diff --git a/modules/highgui/CMakeLists.txt b/modules/highgui/CMakeLists.txt index 0b7f8fe526a6..dba05ec05b49 100644 --- a/modules/highgui/CMakeLists.txt +++ b/modules/highgui/CMakeLists.txt @@ -1,7 +1,3 @@ -if (WINRT) - ocv_module_disable(highgui) -endif() - set(the_description "High-level GUI and Media I/O") ocv_add_module(highgui opencv_imgproc opencv_imgcodecs opencv_videoio WRAP python) @@ -11,8 +7,7 @@ ocv_add_module(highgui opencv_imgproc opencv_imgcodecs opencv_videoio WRAP pytho # Jose Luis Blanco, 2008 # ---------------------------------------------------------------------------- -# Compilation with /ZW is not allowed for *.c files -if(HAVE_WINRT_CX AND NOT WINRT) +if(WINRT_8_1) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /ZW") endif() @@ -71,6 +66,25 @@ elseif(HAVE_QT) if(${_have_flag}) set_source_files_properties(${_RCC_OUTFILES} PROPERTIES COMPILE_FLAGS -Wno-missing-declarations) endif() +elseif(WINRT AND NOT WINRT_8_0) + # Dependencies used by the implementation referenced + # below are not available on WinRT 8.0. + # Enabling it for WiRT 8.1+ only. + status(" ${name}: WinRT detected") + list(APPEND highgui_srcs ${CMAKE_CURRENT_LIST_DIR}/src/window_winrt.cpp) + + # libraries below are neither available nor required + # on ARM devices and/or Windows Phone + if(WINRT_PHONE OR (OpenCV_ARCH STREQUAL "ARM")) + list(REMOVE_ITEM HIGHGUI_LIBRARIES "comctl32" "gdi32" "ole32" "setupapi") + if(WINRT_PHONE) + status(" ${name}: Windows Phone detected") + elseif(OpenCV_ARCH STREQUAL "ARM") + status(" ${name}: ARM detected") + endif() + status(" ${name}: Removing 'comctl32.lib, gdi32.lib, ole32.lib, setupapi.lib'") + status(" ${name}: Leaving '${HIGHGUI_LIBRARIES}'") + endif() elseif(HAVE_WIN32UI) list(APPEND highgui_srcs ${CMAKE_CURRENT_LIST_DIR}/src/window_w32.cpp) elseif(HAVE_GTK OR HAVE_GTK3) diff --git a/modules/highgui/src/agile_wrl.h b/modules/highgui/src/agile_wrl.h deleted file mode 100644 index 99fbf4185667..000000000000 --- a/modules/highgui/src/agile_wrl.h +++ /dev/null @@ -1,568 +0,0 @@ -// -// Copyright (C) Microsoft Corporation -// All rights reserved. -// Modified for native C++ WRL support by Gregory Morse -// -// Code in Details namespace is for internal usage within the library code -// - -#ifndef _PLATFORM_AGILE_H_ -#define _PLATFORM_AGILE_H_ - -#ifdef _MSC_VER -#pragma once -#endif // _MSC_VER - -#include -#include - -template class Agile; - -template -struct UnwrapAgile -{ - static const bool _IsAgile = false; -}; -template -struct UnwrapAgile> -{ - static const bool _IsAgile = true; -}; -template -struct UnwrapAgile> -{ - static const bool _IsAgile = true; -}; - -#define IS_AGILE(T) UnwrapAgile::_IsAgile - -#define __is_winrt_agile(T) (std::is_same::value || std::is_base_of::value || std::is_base_of::value) //derived from Microsoft::WRL::FtmBase or IAgileObject - -#define __is_win_interface(T) (std::is_base_of::value || std::is_base_of::value) //derived from IUnknown or IInspectable - -#define __is_win_class(T) (std::is_same::value || std::is_base_of::value) //derived from Microsoft::WRL::RuntimeClass or HSTRING - - namespace Details - { - IUnknown* __stdcall GetObjectContext(); - HRESULT __stdcall GetProxyImpl(IUnknown*, REFIID, IUnknown*, IUnknown**); - HRESULT __stdcall ReleaseInContextImpl(IUnknown*, IUnknown*); - - template -#if _MSC_VER >= 1800 - __declspec(no_refcount) inline HRESULT GetProxy(T *ObjectIn, IUnknown *ContextCallBack, T **Proxy) -#else - inline HRESULT GetProxy(T *ObjectIn, IUnknown *ContextCallBack, T **Proxy) -#endif - { -#if _MSC_VER >= 1800 - return GetProxyImpl(*reinterpret_cast(&ObjectIn), __uuidof(T*), ContextCallBack, reinterpret_cast(Proxy)); -#else - return GetProxyImpl(*reinterpret_cast(&const_cast(ObjectIn)), __uuidof(T*), ContextCallBack, reinterpret_cast(Proxy)); -#endif - } - - template - inline HRESULT ReleaseInContext(T *ObjectIn, IUnknown *ContextCallBack) - { - return ReleaseInContextImpl(ObjectIn, ContextCallBack); - } - - template - class AgileHelper - { - __abi_IUnknown* _p; - bool _release; - public: - AgileHelper(__abi_IUnknown* p, bool release = true) : _p(p), _release(release) - { - } - AgileHelper(AgileHelper&& other) : _p(other._p), _release(other._release) - { - _other._p = nullptr; - _other._release = true; - } - AgileHelper operator=(AgileHelper&& other) - { - _p = other._p; - _release = other._release; - _other._p = nullptr; - _other._release = true; - return *this; - } - - ~AgileHelper() - { - if (_release && _p) - { - _p->__abi_Release(); - } - } - - __declspec(no_refcount) __declspec(no_release_return) - T* operator->() - { - return reinterpret_cast(_p); - } - - __declspec(no_refcount) __declspec(no_release_return) - operator T * () - { - return reinterpret_cast(_p); - } - private: - AgileHelper(const AgileHelper&); - AgileHelper operator=(const AgileHelper&); - }; - template - struct __remove_hat - { - typedef T type; - }; - template - struct __remove_hat - { - typedef T type; - }; - template - struct AgileTypeHelper - { - typename typedef __remove_hat::type type; - typename typedef __remove_hat::type* agileMemberType; - }; - } // namespace Details - -#pragma warning(push) -#pragma warning(disable: 4451) // Usage of ref class inside this context can lead to invalid marshaling of object across contexts - - template < - typename T, - bool TIsNotAgile = (__is_win_class(typename Details::AgileTypeHelper::type) && !__is_winrt_agile(typename Details::AgileTypeHelper::type)) || - __is_win_interface(typename Details::AgileTypeHelper::type) - > - class Agile - { - static_assert(__is_win_class(typename Details::AgileTypeHelper::type) || __is_win_interface(typename Details::AgileTypeHelper::type), "Agile can only be used with ref class or interface class types"); - typename typedef Details::AgileTypeHelper::agileMemberType TypeT; - TypeT _object; - ::Microsoft::WRL::ComPtr _contextCallback; - ULONG_PTR _contextToken; - -#if _MSC_VER >= 1800 - enum class AgileState - { - NonAgilePointer = 0, - AgilePointer = 1, - Unknown = 2 - }; - AgileState _agileState; -#endif - - void CaptureContext() - { - _contextCallback = Details::GetObjectContext(); - __abi_ThrowIfFailed(CoGetContextToken(&_contextToken)); - } - - void SetObject(TypeT object) - { - // Capture context before setting the pointer - // If context capture fails then nothing to cleanup - Release(); - if (object != nullptr) - { - ::Microsoft::WRL::ComPtr checkIfAgile; - HRESULT hr = reinterpret_cast(object)->QueryInterface(__uuidof(IAgileObject), &checkIfAgile); - // Don't Capture context if object is agile - if (hr != S_OK) - { -#if _MSC_VER >= 1800 - _agileState = AgileState::NonAgilePointer; -#endif - CaptureContext(); - } -#if _MSC_VER >= 1800 - else - { - _agileState = AgileState::AgilePointer; - } -#endif - } - _object = object; - } - - public: - Agile() throw() : _object(nullptr), _contextToken(0) -#if _MSC_VER >= 1800 - , _agileState(AgileState::Unknown) -#endif - { - } - - Agile(nullptr_t) throw() : _object(nullptr), _contextToken(0) -#if _MSC_VER >= 1800 - , _agileState(AgileState::Unknown) -#endif - { - } - - explicit Agile(TypeT object) throw() : _object(nullptr), _contextToken(0) -#if _MSC_VER >= 1800 - , _agileState(AgileState::Unknown) -#endif - { - // Assumes that the source object is from the current context - SetObject(object); - } - - Agile(const Agile& object) throw() : _object(nullptr), _contextToken(0) -#if _MSC_VER >= 1800 - , _agileState(AgileState::Unknown) -#endif - { - // Get returns pointer valid for current context - SetObject(object.Get()); - } - - Agile(Agile&& object) throw() : _object(nullptr), _contextToken(0) -#if _MSC_VER >= 1800 - , _agileState(AgileState::Unknown) -#endif - { - // Assumes that the source object is from the current context - Swap(object); - } - - ~Agile() throw() - { - Release(); - } - - TypeT Get() const - { - // Agile object, no proxy required -#if _MSC_VER >= 1800 - if (_agileState == AgileState::AgilePointer || _object == nullptr) -#else - if (_contextToken == 0 || _contextCallback == nullptr || _object == nullptr) -#endif - { - return _object; - } - - // Do the check for same context - ULONG_PTR currentContextToken; - __abi_ThrowIfFailed(CoGetContextToken(¤tContextToken)); - if (currentContextToken == _contextToken) - { - return _object; - } - -#if _MSC_VER >= 1800 - // Different context and holding on to a non agile object - // Do the costly work of getting a proxy - TypeT localObject; - __abi_ThrowIfFailed(Details::GetProxy(_object, _contextCallback.Get(), &localObject)); - - if (_agileState == AgileState::Unknown) -#else - // Object is agile if it implements IAgileObject - // GetAddressOf captures the context with out knowing the type of object that it will hold - if (_object != nullptr) -#endif - { -#if _MSC_VER >= 1800 - // Object is agile if it implements IAgileObject - // GetAddressOf captures the context with out knowing the type of object that it will hold - ::Microsoft::WRL::ComPtr checkIfAgile; - HRESULT hr = reinterpret_cast(localObject)->QueryInterface(__uuidof(IAgileObject), &checkIfAgile); -#else - ::Microsoft::WRL::ComPtr checkIfAgile; - HRESULT hr = reinterpret_cast(_object)->QueryInterface(__uuidof(IAgileObject), &checkIfAgile); -#endif - if (hr == S_OK) - { - auto pThis = const_cast(this); -#if _MSC_VER >= 1800 - pThis->_agileState = AgileState::AgilePointer; -#endif - pThis->_contextToken = 0; - pThis->_contextCallback = nullptr; - return _object; - } -#if _MSC_VER >= 1800 - else - { - auto pThis = const_cast(this); - pThis->_agileState = AgileState::NonAgilePointer; - } -#endif - } - -#if _MSC_VER < 1800 - // Different context and holding on to a non agile object - // Do the costly work of getting a proxy - TypeT localObject; - __abi_ThrowIfFailed(Details::GetProxy(_object, _contextCallback.Get(), &localObject)); -#endif - return localObject; - } - - TypeT* GetAddressOf() throw() - { - Release(); - CaptureContext(); - return &_object; - } - - TypeT* GetAddressOfForInOut() throw() - { - CaptureContext(); - return &_object; - } - - TypeT operator->() const throw() - { - return Get(); - } - - Agile& operator=(nullptr_t) throw() - { - Release(); - return *this; - } - - Agile& operator=(TypeT object) throw() - { - Agile(object).Swap(*this); - return *this; - } - - Agile& operator=(Agile object) throw() - { - // parameter is by copy which gets pointer valid for current context - object.Swap(*this); - return *this; - } - -#if _MSC_VER < 1800 - Agile& operator=(IUnknown* lp) throw() - { - // bump ref count - ::Microsoft::WRL::ComPtr spObject(lp); - - // put it into Platform Object - Platform::Object object; - *(IUnknown**)(&object) = spObject.Detach(); - - SetObject(object); - return *this; - } -#endif - - void Swap(Agile& object) - { - std::swap(_object, object._object); - std::swap(_contextCallback, object._contextCallback); - std::swap(_contextToken, object._contextToken); -#if _MSC_VER >= 1800 - std::swap(_agileState, object._agileState); -#endif - } - - // Release the interface and set to NULL - void Release() throw() - { - if (_object) - { - // Cast to IInspectable (no QI) - IUnknown* pObject = *(IUnknown**)(&_object); - // Set * to null without release - *(IUnknown**)(&_object) = nullptr; - - ULONG_PTR currentContextToken; - __abi_ThrowIfFailed(CoGetContextToken(¤tContextToken)); - if (_contextToken == 0 || _contextCallback == nullptr || _contextToken == currentContextToken) - { - pObject->Release(); - } - else - { - Details::ReleaseInContext(pObject, _contextCallback.Get()); - } - _contextCallback = nullptr; - _contextToken = 0; -#if _MSC_VER >= 1800 - _agileState = AgileState::Unknown; -#endif - } - } - - bool operator==(nullptr_t) const throw() - { - return _object == nullptr; - } - - bool operator==(const Agile& other) const throw() - { - return _object == other._object && _contextToken == other._contextToken; - } - - bool operator<(const Agile& other) const throw() - { - if (reinterpret_cast(_object) < reinterpret_cast(other._object)) - { - return true; - } - - return _object == other._object && _contextToken < other._contextToken; - } - }; - - template - class Agile - { - static_assert(__is_win_class(typename Details::AgileTypeHelper::type) || __is_win_interface(typename Details::AgileTypeHelper::type), "Agile can only be used with ref class or interface class types"); - typename typedef Details::AgileTypeHelper::agileMemberType TypeT; - TypeT _object; - - public: - Agile() throw() : _object(nullptr) - { - } - - Agile(nullptr_t) throw() : _object(nullptr) - { - } - - explicit Agile(TypeT object) throw() : _object(object) - { - } - - Agile(const Agile& object) throw() : _object(object._object) - { - } - - Agile(Agile&& object) throw() : _object(nullptr) - { - Swap(object); - } - - ~Agile() throw() - { - Release(); - } - - TypeT Get() const - { - return _object; - } - - TypeT* GetAddressOf() throw() - { - Release(); - return &_object; - } - - TypeT* GetAddressOfForInOut() throw() - { - return &_object; - } - - TypeT operator->() const throw() - { - return Get(); - } - - Agile& operator=(nullptr_t) throw() - { - Release(); - return *this; - } - - Agile& operator=(TypeT object) throw() - { - if (_object != object) - { - _object = object; - } - return *this; - } - - Agile& operator=(Agile object) throw() - { - object.Swap(*this); - return *this; - } - -#if _MSC_VER < 1800 - Agile& operator=(IUnknown* lp) throw() - { - Release(); - // bump ref count - ::Microsoft::WRL::ComPtr spObject(lp); - - // put it into Platform Object - Platform::Object object; - *(IUnknown**)(&object) = spObject.Detach(); - - _object = object; - return *this; - } -#endif - - // Release the interface and set to NULL - void Release() throw() - { - _object = nullptr; - } - - void Swap(Agile& object) - { - std::swap(_object, object._object); - } - - bool operator==(nullptr_t) const throw() - { - return _object == nullptr; - } - - bool operator==(const Agile& other) const throw() - { - return _object == other._object; - } - - bool operator<(const Agile& other) const throw() - { - return reinterpret_cast(_object) < reinterpret_cast(other._object); - } - }; - -#pragma warning(pop) - - template - bool operator==(nullptr_t, const Agile& a) throw() - { - return a == nullptr; - } - - template - bool operator!=(const Agile& a, nullptr_t) throw() - { - return !(a == nullptr); - } - - template - bool operator!=(nullptr_t, const Agile& a) throw() - { - return !(a == nullptr); - } - - template - bool operator!=(const Agile& a, const Agile& b) throw() - { - return !(a == b); - } - - -#endif // _PLATFORM_AGILE_H_ diff --git a/modules/highgui/src/ppltasks_winrt.h b/modules/highgui/src/ppltasks_winrt.h deleted file mode 100644 index c9867d8a5698..000000000000 --- a/modules/highgui/src/ppltasks_winrt.h +++ /dev/null @@ -1,9466 +0,0 @@ -/*** -* ==++== -* -* Copyright (c) Microsoft Corporation. All rights reserved. -* -* Modified for native C++ WRL support by Gregory Morse -* -* ==--== -* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ -* -* ppltasks_winrt.h -* -* Parallel Patterns Library - PPL Tasks -* -* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -****/ - -#pragma once - -#ifndef _PPLTASKS_WINRT_H -#define _PPLTASKS_WINRT_H - -#include -#include -#if _MSC_VER >= 1800 -#include - -// Cannot build using a compiler that is older than dev10 SP1 -#ifdef _MSC_VER -#if _MSC_FULL_VER < 160040219 /*IFSTRIP=IGN*/ -#error ERROR: Visual Studio 2010 SP1 or later is required to build ppltasks -#endif /*IFSTRIP=IGN*/ -#endif -#else -#include -#endif -#include -#include -#include -#include -#if _MSC_VER >= 1800 -#include -#endif - -#ifndef __cplusplus_winrt - -#include -#include -#if _MSC_VER >= 1800 -#include "agile_wrl.h" -#endif -#include -#include - -#ifndef _UITHREADCTXT_SUPPORT - -#ifdef WINAPI_FAMILY /*IFSTRIP=IGN*/ - -// It is safe to include winapifamily as WINAPI_FAMILY was defined by the user -#include - -#if WINAPI_FAMILY == WINAPI_FAMILY_APP /*IFSTRIP=IGN*/ - // UI thread context support is not required for desktop and Windows Store apps - #define _UITHREADCTXT_SUPPORT 0 -#elif WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP /*IFSTRIP=IGN*/ - // UI thread context support is not required for desktop and Windows Store apps - #define _UITHREADCTXT_SUPPORT 0 -#else /* WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP */ - #define _UITHREADCTXT_SUPPORT 1 -#endif /* WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP */ - -#else /* WINAPI_FAMILY */ - // Not supported without a WINAPI_FAMILY setting. - #define _UITHREADCTXT_SUPPORT 0 -#endif /* WINAPI_FAMILY */ - -#endif /* _UITHREADCTXT_SUPPORT */ - -#if _UITHREADCTXT_SUPPORT -#include -#endif /* _UITHREADCTXT_SUPPORT */ - -#pragma detect_mismatch("_PPLTASKS_WITH_WINRT", "0") - -#ifdef _DEBUG -#define _DBG_ONLY(X) X -#else -#define _DBG_ONLY(X) -#endif // #ifdef _DEBUG - -// std::copy_exception changed to std::make_exception_ptr from VS 2010 to VS 11. -#ifdef _MSC_VER -#if _MSC_VER < 1700 /*IFSTRIP=IGN*/ -namespace std -{ - template exception_ptr make_exception_ptr(_E _Except) - { - return copy_exception(_Except); - } -} -#endif -#ifndef _PPLTASK_ASYNC_LOGGING -#if _MSC_VER >= 1800 && defined(__cplusplus_winrt) -#define _PPLTASK_ASYNC_LOGGING 1 // Only enable async logging under dev12 winrt -#else -#define _PPLTASK_ASYNC_LOGGING 0 -#endif -#endif -#endif - -#pragma pack(push,_CRT_PACKING) - -#pragma warning(push) -#pragma warning(disable: 28197) -#pragma warning(disable: 4100) // Unreferenced formal parameter - needed for document generation -#if _MSC_VER >= 1800 -#pragma warning(disable: 4127) // constant express in if condition - we use it for meta programming -#else -#pragma warning(disable: 4702) // Unreachable code - it is caused by user lambda throw exceptions -#endif - -// All CRT public header files are required to be protected from the macro new -#pragma push_macro("new") -#undef new - -// stuff ported from Dev11 CRT -// NOTE: this doesn't actually match std::declval. it behaves differently for void! -// so don't blindly change it to std::declval. -namespace stdx -{ - template - _T&& declval(); -} - -/// -/// The Concurrency_winrt namespace provides classes and functions that give you access to the Concurrency Runtime, -/// a concurrent programming framework for C++. For more information, see . -/// -/**/ -namespace Concurrency_winrt -{ - // In debug builds, default to 10 frames, unless this is overridden prior to #includ'ing ppltasks.h. In retail builds, default to only one frame. -#ifndef PPL_TASK_SAVE_FRAME_COUNT -#ifdef _DEBUG -#define PPL_TASK_SAVE_FRAME_COUNT 10 -#else -#define PPL_TASK_SAVE_FRAME_COUNT 1 -#endif -#endif - - /// - /// Helper macro to determine how many stack frames need to be saved. When any number less or equal to 1 is specified, - /// only one frame is captured and no stackwalk will be involved. Otherwise, the number of callstack frames will be captured. - /// - /// - /// This needs to be defined as a macro rather than a function so that if we're only gathering one frame, _ReturnAddress() - /// will evaluate to client code, rather than a helper function inside of _TaskCreationCallstack, itself. - /// -#ifdef _CAPTURE_CALLSTACK -#undef _CAPTURE_CALLSTACK -#endif -#if PPL_TASK_SAVE_FRAME_COUNT > 1 -#if !defined(_DEBUG) -#pragma message ("WARNING: Redefinning PPL_TASK_SAVE_FRAME_COUNT under Release build for non-desktop applications is not supported; only one frame will be captured!") -#define _CAPTURE_CALLSTACK() ::Concurrency_winrt::details::_TaskCreationCallstack::_CaptureSingleFrameCallstack(_ReturnAddress()) -#else -#define _CAPTURE_CALLSTACK() ::Concurrency_winrt::details::_TaskCreationCallstack::_CaptureMultiFramesCallstack(PPL_TASK_SAVE_FRAME_COUNT) -#endif -#else -#define _CAPTURE_CALLSTACK() ::Concurrency_winrt::details::_TaskCreationCallstack::_CaptureSingleFrameCallstack(_ReturnAddress()) -#endif -/// - -/// A type that represents the terminal state of a task. Valid values are completed and canceled. -/// -/// -/**/ -typedef Concurrency::task_group_status task_status; - -template class task; -template <> class task; - -/// -/// Returns an indication of whether the task that is currently executing has received a request to cancel its -/// execution. Cancellation is requested on a task if the task was created with a cancellation token, and -/// the token source associated with that token is canceled. -/// -/// -/// true if the currently executing task has received a request for cancellation, false otherwise. -/// -/// -/// If you call this method in the body of a task and it returns true, you must respond with a call to -/// cancel_current_task to acknowledge the cancellation request, -/// after performing any cleanup you need. This will abort the execution of the task and cause it to enter into -/// the canceled state. If you do not respond and continue execution, or return instead of calling -/// cancel_current_task, the task will enter the completed state when it is done. -/// state. -/// A task is not cancellable if it was created without a cancellation token. -/// -/// -/// -/// -/// -/**/ -#if _MSC_VER >= 1800 -inline bool __cdecl is_task_cancellation_requested() -{ - return ::Concurrency::details::_TaskCollection_t::_Is_cancellation_requested(); -} -#else -inline bool __cdecl is_task_cancellation_requested() -{ - // ConcRT scheduler under the hood is using TaskCollection, which is same as task_group - return ::Concurrency::is_current_task_group_canceling(); -} -#endif - -/// -/// Cancels the currently executing task. This function can be called from within the body of a task to abort the -/// task's execution and cause it to enter the canceled state. While it may be used in response to -/// the is_task_cancellation_requested function, you may -/// also use it by itself, to initiate cancellation of the task that is currently executing. -/// It is not a supported scenario to call this function if you are not within the body of a task. -/// Doing so will result in undefined behavior such as a crash or a hang in your application. -/// -/// -/// -/**/ -//#if _MSC_VER >= 1800 -inline __declspec(noreturn) void __cdecl cancel_current_task() -{ - throw Concurrency::task_canceled(); -} -//#else -//_CRTIMP2 __declspec(noreturn) void __cdecl cancel_current_task(); -//#endif - -namespace details -{ -#if _MSC_VER >= 1800 - /// - /// Callstack container, which is used to capture and preserve callstacks in ppltasks. - /// Members of this class is examined by vc debugger, thus there will be no public access methods. - /// Please note that names of this class should be kept stable for debugger examining. - /// - class _TaskCreationCallstack - { - private: - // If _M_SingleFrame != nullptr, there will be only one frame of callstacks, which is stored in _M_SingleFrame; - // otherwise, _M_Frame will store all the callstack frames. - void* _M_SingleFrame; - std::vector _M_frames; - public: - _TaskCreationCallstack() - { - _M_SingleFrame = nullptr; - } - - // Store one frame of callstack. This function works for both Debug / Release CRT. - static _TaskCreationCallstack _CaptureSingleFrameCallstack(void *_SingleFrame) - { - _TaskCreationCallstack _csc; - _csc._M_SingleFrame = _SingleFrame; - return _csc; - } - - // Capture _CaptureFrames number of callstack frames. This function only work properly for Desktop or Debug CRT. - __declspec(noinline) - static _TaskCreationCallstack _CaptureMultiFramesCallstack(size_t _CaptureFrames) - { - _TaskCreationCallstack _csc; - _csc._M_frames.resize(_CaptureFrames); - // skip 2 frames to make sure callstack starts from user code - _csc._M_frames.resize(::Concurrency::details::platform::CaptureCallstack(&_csc._M_frames[0], 2, _CaptureFrames)); - return _csc; - } - }; -#endif - typedef UINT32 _Unit_type; - - struct _TypeSelectorNoAsync {}; - struct _TypeSelectorAsyncOperationOrTask {}; - struct _TypeSelectorAsyncOperation : public _TypeSelectorAsyncOperationOrTask { }; - struct _TypeSelectorAsyncTask : public _TypeSelectorAsyncOperationOrTask { }; - struct _TypeSelectorAsyncAction {}; - struct _TypeSelectorAsyncActionWithProgress {}; - struct _TypeSelectorAsyncOperationWithProgress {}; - - template - struct _NormalizeVoidToUnitType - { - typedef _Ty _Type; - }; - - template<> - struct _NormalizeVoidToUnitType - { - typedef _Unit_type _Type; - }; - - template - struct _IsUnwrappedAsyncSelector - { - static const bool _Value = true; - }; - - template<> - struct _IsUnwrappedAsyncSelector<_TypeSelectorNoAsync> - { - static const bool _Value = false; - }; - - template - struct _UnwrapTaskType - { - typedef _Ty _Type; - }; - - template - struct _UnwrapTaskType> - { - typedef _Ty _Type; - }; - - template - _TypeSelectorAsyncTask _AsyncOperationKindSelector(task<_T>); - - _TypeSelectorNoAsync _AsyncOperationKindSelector(...); - - template - struct _Unhat - { - typedef _Type _Value; - }; - - template - struct _Unhat<_Type*> - { - typedef _Type _Value; - }; - - //struct _NonUserType { public: int _Dummy; }; - - template - struct _ValueTypeOrRefType - { - typedef _Unit_type _Value; - }; - - template - struct _ValueTypeOrRefType<_Type, true> - { - typedef _Type _Value; - }; - - template - _Ty _UnwrapAsyncActionWithProgressSelector(ABI::Windows::Foundation::IAsyncActionWithProgress_impl<_Ty>*); - - template - _Ty _UnwrapAsyncActionWithProgressSelector(...); - - template - _Progress _UnwrapAsyncOperationWithProgressProgressSelector(ABI::Windows::Foundation::IAsyncOperationWithProgress_impl<_Ty, _Progress>*); - - template - _Progress _UnwrapAsyncOperationWithProgressProgressSelector(...); - - template - _T2 _ProgressTypeSelector(ABI::Windows::Foundation::IAsyncOperationWithProgress<_T1, _T2>*); - - template - _T1 _ProgressTypeSelector(ABI::Windows::Foundation::IAsyncActionWithProgress<_T1>*); - - template - struct _GetProgressType - { - typedef decltype(_ProgressTypeSelector(stdx::declval<_Type>())) _Value; - }; - - template - _TypeSelectorAsyncOperation _AsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncOperation<_T>*); - - _TypeSelectorAsyncAction _AsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncAction*); - - template - _TypeSelectorAsyncOperationWithProgress _AsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncOperationWithProgress<_T1, _T2>*); - - template - _TypeSelectorAsyncActionWithProgress _AsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncActionWithProgress<_T>*); - - template - struct _IsIAsyncInfo - { - static const bool _Value = std::is_base_of::_Value>::value || - std::is_same<_TypeSelectorAsyncAction, decltype(details::_AsyncOperationKindSelector(stdx::declval<_Type>()))>::value || - std::is_same<_TypeSelectorAsyncOperation, decltype(details::_AsyncOperationKindSelector(stdx::declval<_Type>()))>::value || - std::is_same<_TypeSelectorAsyncOperationWithProgress, decltype(details::_AsyncOperationKindSelector(stdx::declval<_Type>()))>::value || - std::is_same<_TypeSelectorAsyncActionWithProgress, decltype(details::_AsyncOperationKindSelector(stdx::declval<_Type>()))>::value; - }; - - template <> - struct _IsIAsyncInfo - { - static const bool _Value = false; - }; - - template - _Ty _UnwrapAsyncOperationSelector(ABI::Windows::Foundation::IAsyncOperation_impl<_Ty>*); - - template - _Ty _UnwrapAsyncOperationSelector(...); - - template - _Ty _UnwrapAsyncOperationWithProgressSelector(ABI::Windows::Foundation::IAsyncOperationWithProgress_impl<_Ty, _Progress>*); - - template - _Ty _UnwrapAsyncOperationWithProgressSelector(...); - - // Unwrap functions for asyncOperations - template - auto _GetUnwrappedType(ABI::Windows::Foundation::IAsyncOperation<_Ty>*) -> typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type; - - void _GetUnwrappedType(ABI::Windows::Foundation::IAsyncAction*); - - template - auto _GetUnwrappedType(ABI::Windows::Foundation::IAsyncOperationWithProgress<_Ty, _Progress>*) -> typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type; - - template - void _GetUnwrappedType(ABI::Windows::Foundation::IAsyncActionWithProgress<_Progress>*); - - template - _T _ReturnAsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncOperation<_T>*); - - void _ReturnAsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncAction*); - - template - _T1 _ReturnAsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncOperationWithProgress<_T1, _T2>*); - - template - void _ReturnAsyncOperationKindSelector(ABI::Windows::Foundation::IAsyncActionWithProgress<_T>*); - - class _ProgressReporterCtorArgType{}; - - template ::_Value> - struct _TaskTypeTraits - { - typedef typename details::_UnwrapTaskType<_Type>::_Type _TaskRetType; - typedef _TaskRetType _TaskRetType_abi; - typedef decltype(_AsyncOperationKindSelector(stdx::declval<_Type>())) _AsyncKind; - typedef typename details::_NormalizeVoidToUnitType<_TaskRetType>::_Type _NormalizedTaskRetType; - - static const bool _IsAsyncTask = _IsAsync; - static const bool _IsUnwrappedTaskOrAsync = details::_IsUnwrappedAsyncSelector<_AsyncKind>::_Value; - }; - - template - struct _TaskTypeTraits<_Type, true> - { - typedef decltype(_ReturnAsyncOperationKindSelector(stdx::declval<_Type>())) _TaskRetType; - typedef decltype(_GetUnwrappedType(stdx::declval<_Type>())) _TaskRetType_abi; - typedef _TaskRetType _NormalizedTaskRetType; - typedef decltype(_AsyncOperationKindSelector(stdx::declval<_Type>())) _AsyncKind; - - static const bool _IsAsyncTask = true; - static const bool _IsUnwrappedTaskOrAsync = details::_IsUnwrappedAsyncSelector<_AsyncKind>::_Value; - }; - - template auto _IsCallable(_Function _Func, int, int, int) -> decltype(_Func(stdx::declval*>()), std::true_type()) { (void)_Func; return std::true_type(); } - template auto _IsCallable(_Function _Func, int, int, ...) -> decltype(_Func(stdx::declval<_ReturnType*>()), std::true_type()) { (void)_Func; return std::true_type(); } - template auto _IsCallable(_Function _Func, int, ...) -> decltype(_Func(), std::true_type()) { (void)_Func; return std::true_type(); } - template std::false_type _IsCallable(_Function, ...) { return std::false_type(); } - - template <> - struct _TaskTypeTraits - { - typedef void _TaskRetType; - typedef void _TaskRetType_abi; - typedef _TypeSelectorNoAsync _AsyncKind; - typedef _Unit_type _NormalizedTaskRetType; - - static const bool _IsAsyncTask = false; - static const bool _IsUnwrappedTaskOrAsync = false; - }; - - // *************************************************************************** - // Template type traits and helpers for async production APIs: - // - - struct _ZeroArgumentFunctor { }; - struct _OneArgumentFunctor { }; - struct _TwoArgumentFunctor { }; - struct _ThreeArgumentFunctor { }; - - // **************************************** - // CLASS TYPES: - - // mutable functions - // ******************** - // THREE ARGUMENTS: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3)); - - // non-void arg: - template - _Arg2 _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3)); - - // non-void arg: - template - _Arg3 _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3)); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3)); - - template - _ThreeArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3)); - - // ******************** - // TWO ARGUMENTS: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2)); - - // non-void arg: - template - _Arg2 _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2)); - - // non-void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2)); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2)); - - template - _TwoArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1, _Arg2)); - - // ******************** - // ONE ARGUMENT: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1)); - - // non-void arg: - template - void _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1)); - - // non-void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1)); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1)); - - template - _OneArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1)); - - // ******************** - // ZERO ARGUMENT: - - // void arg: - template - void _Arg1ClassHelperThunk(_ReturnType(_Class::*)()); - - // void arg: - template - void _Arg2ClassHelperThunk(_ReturnType(_Class::*)()); - - // void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)()); - - // void arg: - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)()); - - template - _ZeroArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)()); - - // ******************** - // THREE ARGUMENTS: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3) const); - - // non-void arg: - template - _Arg2 _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3) const); - - // non-void arg: - template - _Arg3 _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3) const); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3) const); - - template - _ThreeArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1, _Arg2, _Arg3) const); - - // ******************** - // TWO ARGUMENTS: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2) const); - - // non-void arg: - template - _Arg2 _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2) const); - - // non-void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2) const); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1, _Arg2) const); - - template - _TwoArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1, _Arg2) const); - - // ******************** - // ONE ARGUMENT: - - // non-void arg: - template - _Arg1 _Arg1ClassHelperThunk(_ReturnType(_Class::*)(_Arg1) const); - - // non-void arg: - template - void _Arg2ClassHelperThunk(_ReturnType(_Class::*)(_Arg1) const); - - // non-void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)(_Arg1) const); - - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)(_Arg1) const); - - template - _OneArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)(_Arg1) const); - - // ******************** - // ZERO ARGUMENT: - - // void arg: - template - void _Arg1ClassHelperThunk(_ReturnType(_Class::*)() const); - - // void arg: - template - void _Arg2ClassHelperThunk(_ReturnType(_Class::*)() const); - - // void arg: - template - void _Arg3ClassHelperThunk(_ReturnType(_Class::*)() const); - - // void arg: - template - _ReturnType _ReturnTypeClassHelperThunk(_ReturnType(_Class::*)() const); - - template - _ZeroArgumentFunctor _ArgumentCountHelper(_ReturnType(_Class::*)() const); - - // **************************************** - // POINTER TYPES: - - // ******************** - // THREE ARGUMENTS: - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg3 _Arg3PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2, _Arg3)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2, _Arg3)); - - template - _ThreeArgumentFunctor _ArgumentCountHelper(_ReturnType(__cdecl *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg3 _Arg3PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2, _Arg3)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2, _Arg3)); - - template - _ThreeArgumentFunctor _ArgumentCountHelper(_ReturnType(__stdcall *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2, _Arg3)); - - template - _Arg3 _Arg3PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2, _Arg3)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2, _Arg3)); - - template - _ThreeArgumentFunctor _ArgumentCountHelper(_ReturnType(__fastcall *)(_Arg1, _Arg2, _Arg3)); - - // ******************** - // TWO ARGUMENTS: - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__cdecl *)(_Arg1, _Arg2)); - - template - _TwoArgumentFunctor _ArgumentCountHelper(_ReturnType(__cdecl *)(_Arg1, _Arg2)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__stdcall *)(_Arg1, _Arg2)); - - template - _TwoArgumentFunctor _ArgumentCountHelper(_ReturnType(__stdcall *)(_Arg1, _Arg2)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2)); - - template - _Arg2 _Arg2PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__fastcall *)(_Arg1, _Arg2)); - - template - _TwoArgumentFunctor _ArgumentCountHelper(_ReturnType(__fastcall *)(_Arg1, _Arg2)); - - // ******************** - // ONE ARGUMENT: - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1)); - - template - void _Arg2PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__cdecl *)(_Arg1)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__cdecl *)(_Arg1)); - - template - _OneArgumentFunctor _ArgumentCountHelper(_ReturnType(__cdecl *)(_Arg1)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1)); - - template - void _Arg2PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__stdcall *)(_Arg1)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__stdcall *)(_Arg1)); - - template - _OneArgumentFunctor _ArgumentCountHelper(_ReturnType(__stdcall *)(_Arg1)); - - template - _Arg1 _Arg1PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1)); - - template - void _Arg2PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1)); - - template - void _Arg3PFNHelperThunk(_ReturnType(__fastcall *)(_Arg1)); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__fastcall *)(_Arg1)); - - template - _OneArgumentFunctor _ArgumentCountHelper(_ReturnType(__fastcall *)(_Arg1)); - - // ******************** - // ZERO ARGUMENT: - - template - void _Arg1PFNHelperThunk(_ReturnType(__cdecl *)()); - - template - void _Arg2PFNHelperThunk(_ReturnType(__cdecl *)()); - - template - void _Arg3PFNHelperThunk(_ReturnType(__cdecl *)()); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__cdecl *)()); - - template - _ZeroArgumentFunctor _ArgumentCountHelper(_ReturnType(__cdecl *)()); - - template - void _Arg1PFNHelperThunk(_ReturnType(__stdcall *)()); - - template - void _Arg2PFNHelperThunk(_ReturnType(__stdcall *)()); - - template - void _Arg3PFNHelperThunk(_ReturnType(__stdcall *)()); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__stdcall *)()); - - template - _ZeroArgumentFunctor _ArgumentCountHelper(_ReturnType(__stdcall *)()); - - template - void _Arg1PFNHelperThunk(_ReturnType(__fastcall *)()); - - template - void _Arg2PFNHelperThunk(_ReturnType(__fastcall *)()); - - template - void _Arg3PFNHelperThunk(_ReturnType(__fastcall *)()); - - template - _ReturnType _ReturnTypePFNHelperThunk(_ReturnType(__fastcall *)()); - - template - _ZeroArgumentFunctor _ArgumentCountHelper(_ReturnType(__fastcall *)()); - - template - struct _FunctorArguments - { - static const size_t _Count = 0; - }; - - template<> - struct _FunctorArguments<_OneArgumentFunctor> - { - static const size_t _Count = 1; - }; - - template<> - struct _FunctorArguments<_TwoArgumentFunctor> - { - static const size_t _Count = 2; - }; - - template<> - struct _FunctorArguments<_ThreeArgumentFunctor> - { - static const size_t _Count = 3; - }; - - template - struct _FunctorTypeTraits - { - typedef decltype(_ArgumentCountHelper(&(_T::operator()))) _ArgumentCountType; - static const size_t _ArgumentCount = _FunctorArguments<_ArgumentCountType>::_Count; - - typedef decltype(_ReturnTypeClassHelperThunk(&(_T::operator()))) _ReturnType; - typedef decltype(_Arg1ClassHelperThunk(&(_T::operator()))) _Argument1Type; - typedef decltype(_Arg2ClassHelperThunk(&(_T::operator()))) _Argument2Type; - typedef decltype(_Arg3ClassHelperThunk(&(_T::operator()))) _Argument3Type; - }; - - template - struct _FunctorTypeTraits<_T *> - { - typedef decltype(_ArgumentCountHelper(stdx::declval<_T*>())) _ArgumentCountType; - static const size_t _ArgumentCount = _FunctorArguments<_ArgumentCountType>::_Count; - - typedef decltype(_ReturnTypePFNHelperThunk(stdx::declval<_T*>())) _ReturnType; - typedef decltype(_Arg1PFNHelperThunk(stdx::declval<_T*>())) _Argument1Type; - typedef decltype(_Arg2PFNHelperThunk(stdx::declval<_T*>())) _Argument2Type; - typedef decltype(_Arg3PFNHelperThunk(stdx::declval<_T*>())) _Argument3Type; - }; - - task _To_task(); - - template auto _IsVoidConversionHelper(_Function _Func, int) -> typename decltype(_Func(_To_task()), std::true_type()); - template std::false_type _IsVoidConversionHelper(_Function _Func, ...); - - template std::true_type _VoidIsTaskHelper(task _Arg, int); - template std::false_type _VoidIsTaskHelper(T _Arg, ...); - - template(), 0)), std::true_type>::value, const size_t _Count = _FunctorTypeTraits<_Function>::_ArgumentCount> - struct _FunctionTypeTraits - { - typedef typename _Unhat::_Argument2Type>::_Value _FuncRetType; - static_assert(std::is_same::_Argument1Type, _ExpectedParameterType>::value || - std::is_same::_Argument1Type, task<_ExpectedParameterType>>::value, "incorrect parameter type for the callable object in 'then'; consider _ExpectedParameterType or task<_ExpectedParameterType> (see below)"); - - typedef decltype(_VoidIsTaskHelper(stdx::declval<_FunctorTypeTraits<_Function>::_Argument1Type>(), 0)) _Takes_task; - }; - - //if there is a continuation parameter, then must use void/no return value - template - struct _FunctionTypeTraits<_Function, _ExpectedParameterType, _IsVoidConversion, 1> - { - typedef void _FuncRetType; - static_assert(std::is_same::_Argument1Type, _ExpectedParameterType>::value || - std::is_same::_Argument1Type, task<_ExpectedParameterType>>::value, "incorrect parameter type for the callable object in 'then'; consider _ExpectedParameterType or task<_ExpectedParameterType> (see below)"); - - typedef decltype(_VoidIsTaskHelper(stdx::declval<_FunctorTypeTraits<_Function>::_Argument1Type>(), 0)) _Takes_task; - }; - - template - struct _FunctionTypeTraits<_Function, void, true, 1> - { - typedef void _FuncRetType; - static_assert(std::is_same::_Argument1Type, decltype(_To_task())>::value, "incorrect parameter type for the callable object in 'then'; consider _ExpectedParameterType or task<_ExpectedParameterType> (see below)"); - - typedef decltype(_VoidIsTaskHelper(stdx::declval<_FunctorTypeTraits<_Function>::_Argument1Type>(), 0)) _Takes_task; - }; - - template - struct _FunctionTypeTraits<_Function, void, false, 1> - { - typedef typename _Unhat::_Argument1Type>::_Value _FuncRetType; - - typedef std::false_type _Takes_task; - }; - - template - struct _FunctionTypeTraits<_Function, _ExpectedParameterType, _IsVoidConversion, 0> - { - typedef void _FuncRetType; - - typedef std::false_type _Takes_task; - }; - - template - struct _ContinuationTypeTraits - { - typedef typename task::_FuncRetType>::_TaskRetType_abi> _TaskOfType; - }; - - // _InitFunctorTypeTraits is used to decide whether a task constructed with a lambda should be unwrapped. Depending on how the variable is - // declared, the constructor may or may not perform unwrapping. For eg. - // - // This declaration SHOULD NOT cause unwrapping - // task> t1([]() -> task { - // task t2([]() {}); - // return t2; - // }); - // - // This declaration SHOULD cause unwrapping - // task> t1([]() -> task { - // task t2([]() {}); - // return t2; - // }); - // If the type of the task is the same as the return type of the function, no unwrapping should take place. Else normal rules apply. - template - struct _InitFunctorTypeTraits - { - typedef typename _TaskTypeTraits<_FuncRetType>::_AsyncKind _AsyncKind; - static const bool _IsAsyncTask = _TaskTypeTraits<_FuncRetType>::_IsAsyncTask; - static const bool _IsUnwrappedTaskOrAsync = _TaskTypeTraits<_FuncRetType>::_IsUnwrappedTaskOrAsync; - }; - - template - struct _InitFunctorTypeTraits - { - typedef _TypeSelectorNoAsync _AsyncKind; - static const bool _IsAsyncTask = false; - static const bool _IsUnwrappedTaskOrAsync = false; - }; - /// - /// Helper object used for LWT invocation. - /// - struct _TaskProcThunk - { - _TaskProcThunk(const std::function & _Callback) : - _M_func(_Callback) - { - } - - static void __cdecl _Bridge(void *_PData) - { - _TaskProcThunk *_PThunk = reinterpret_cast<_TaskProcThunk *>(_PData); -#if _MSC_VER >= 1800 - _Holder _ThunkHolder(_PThunk); -#endif - _PThunk->_M_func(); -#if _MSC_VER < 1800 - delete _PThunk; -#endif - } - private: -#if _MSC_VER >= 1800 - // RAII holder - struct _Holder - { - _Holder(_TaskProcThunk * _PThunk) : _M_pThunk(_PThunk) - { - } - - ~_Holder() - { - delete _M_pThunk; - } - - _TaskProcThunk * _M_pThunk; - - private: - _Holder& operator=(const _Holder&); - }; -#endif - std::function _M_func; - _TaskProcThunk& operator=(const _TaskProcThunk&); - }; - - /// - /// Schedule a functor with automatic inlining. Note that this is "fire and forget" scheduling, which cannot be - /// waited on or canceled after scheduling. - /// This schedule method will perform automatic inlining base on . - /// - /// - /// The user functor need to be scheduled. - /// - /// - /// The inlining scheduling policy for current functor. - /// -#if _MSC_VER >= 1800 - typedef Concurrency::details::_TaskInliningMode_t _TaskInliningMode; -#else - typedef Concurrency::details::_TaskInliningMode _TaskInliningMode; -#endif - static void _ScheduleFuncWithAutoInline(const std::function & _Func, _TaskInliningMode _InliningMode) - { -#if _MSC_VER >= 1800 - Concurrency::details::_TaskCollection_t::_RunTask(&_TaskProcThunk::_Bridge, new _TaskProcThunk(_Func), _InliningMode); -#else - Concurrency::details::_StackGuard _Guard; - if (_Guard._ShouldInline(_InliningMode)) - { - _Func(); - } - else - { - Concurrency::details::_CurrentScheduler::_ScheduleTask(reinterpret_cast(&_TaskProcThunk::_Bridge), new _TaskProcThunk(_Func)); - } -#endif - } - class _ContextCallback - { - typedef std::function _CallbackFunction; - - public: - - static _ContextCallback _CaptureCurrent() - { - _ContextCallback _Context; - _Context._Capture(); - return _Context; - } - - ~_ContextCallback() - { - _Reset(); - } - - _ContextCallback(bool _DeferCapture = false) - { - if (_DeferCapture) - { - _M_context._M_captureMethod = _S_captureDeferred; - } - else - { - _M_context._M_pContextCallback = nullptr; - } - } - - // Resolves a context that was created as _S_captureDeferred based on the environment (ancestor, current context). - void _Resolve(bool _CaptureCurrent) - { - if (_M_context._M_captureMethod == _S_captureDeferred) - { - _M_context._M_pContextCallback = nullptr; - - if (_CaptureCurrent) - { - if (_IsCurrentOriginSTA()) - { - _Capture(); - } -#if _UITHREADCTXT_SUPPORT - else - { - // This method will fail if not called from the UI thread. - HRESULT _Hr = CaptureUiThreadContext(&_M_context._M_pContextCallback); - if (FAILED(_Hr)) - { - _M_context._M_pContextCallback = nullptr; - } - } -#endif // _UITHREADCTXT_SUPPORT - } - } - } - - void _Capture() - { - HRESULT _Hr = CoGetObjectContext(IID_IContextCallback, reinterpret_cast(&_M_context._M_pContextCallback)); - if (FAILED(_Hr)) - { - _M_context._M_pContextCallback = nullptr; - } - } - - _ContextCallback(const _ContextCallback& _Src) - { - _Assign(_Src._M_context._M_pContextCallback); - } - - _ContextCallback(_ContextCallback&& _Src) - { - _M_context._M_pContextCallback = _Src._M_context._M_pContextCallback; - _Src._M_context._M_pContextCallback = nullptr; - } - - _ContextCallback& operator=(const _ContextCallback& _Src) - { - if (this != &_Src) - { - _Reset(); - _Assign(_Src._M_context._M_pContextCallback); - } - return *this; - } - - _ContextCallback& operator=(_ContextCallback&& _Src) - { - if (this != &_Src) - { - _M_context._M_pContextCallback = _Src._M_context._M_pContextCallback; - _Src._M_context._M_pContextCallback = nullptr; - } - return *this; - } - - bool _HasCapturedContext() const - { - _CONCRT_ASSERT(_M_context._M_captureMethod != _S_captureDeferred); - return (_M_context._M_pContextCallback != nullptr); - } - - HRESULT _CallInContext(_CallbackFunction _Func) const - { - if (!_HasCapturedContext()) - { - _Func(); - } - else - { - ComCallData callData; - ZeroMemory(&callData, sizeof(callData)); - callData.pUserDefined = reinterpret_cast(&_Func); - - HRESULT _Hr = _M_context._M_pContextCallback->ContextCallback(&_Bridge, &callData, IID_ICallbackWithNoReentrancyToApplicationSTA, 5, nullptr); - if (FAILED(_Hr)) - { - return _Hr; - } - } - return S_OK; - } - - bool operator==(const _ContextCallback& _Rhs) const - { - return (_M_context._M_pContextCallback == _Rhs._M_context._M_pContextCallback); - } - - bool operator!=(const _ContextCallback& _Rhs) const - { - return !(operator==(_Rhs)); - } - - private: - - void _Reset() - { - if (_M_context._M_captureMethod != _S_captureDeferred && _M_context._M_pContextCallback != nullptr) - { - _M_context._M_pContextCallback->Release(); - } - } - - void _Assign(IContextCallback *_PContextCallback) - { - _M_context._M_pContextCallback = _PContextCallback; - if (_M_context._M_captureMethod != _S_captureDeferred && _M_context._M_pContextCallback != nullptr) - { - _M_context._M_pContextCallback->AddRef(); - } - } - - static HRESULT __stdcall _Bridge(ComCallData *_PParam) - { - _CallbackFunction *pFunc = reinterpret_cast<_CallbackFunction *>(_PParam->pUserDefined); - return (*pFunc)(); - } - - // Returns the origin information for the caller (runtime / Windows Runtime apartment as far as task continuations need know) - static bool _IsCurrentOriginSTA() - { - APTTYPE _AptType; - APTTYPEQUALIFIER _AptTypeQualifier; - - HRESULT hr = CoGetApartmentType(&_AptType, &_AptTypeQualifier); - if (SUCCEEDED(hr)) - { - // We determine the origin of a task continuation by looking at where .then is called, so we can tell whether - // to need to marshal the continuation back to the originating apartment. If an STA thread is in executing in - // a neutral aparment when it schedules a continuation, we will not marshal continuations back to the STA, - // since variables used within a neutral apartment are expected to be apartment neutral. - switch (_AptType) - { - case APTTYPE_MAINSTA: - case APTTYPE_STA: - return true; - default: - break; - } - } - return false; - } - - union - { - IContextCallback *_M_pContextCallback; - size_t _M_captureMethod; - } _M_context; - - static const size_t _S_captureDeferred = 1; - }; - -#if _MSC_VER >= 1800 - template - struct _ResultHolder - { - void Set(const _Type& _type) - { - _Result = _type; - } - - _Type Get() - { - return _Result; - } - - _Type _Result; - }; - - template - struct _ResultHolder<_Type*> - { - void Set(_Type* const & _type) - { - _M_Result = _type; - } - - _Type* Get() - { - return _M_Result.Get(); - } - private: - // ::Platform::Agile handle specialization of all hats - // including ::Platform::String and ::Platform::Array - Agile<_Type*> _M_Result; - }; - - // - // The below are for composability with tasks auto-created from when_any / when_all / && / || constructs. - // - template - struct _ResultHolder> - { - void Set(const std::vector<_Type*>& _type) - { - _Result.reserve(_type.size()); - - for (auto _PTask = _type.begin(); _PTask != _type.end(); ++_PTask) - { - _Result.emplace_back(*_PTask); - } - } - - std::vector<_Type*> Get() - { - // Return vectory with the objects that are marshaled in the proper appartment - std::vector<_Type*> _Return; - _Return.reserve(_Result.size()); - - for (auto _PTask = _Result.begin(); _PTask != _Result.end(); ++_PTask) - { - _Return.push_back(_PTask->Get()); // Agile will marshal the object to appropriate appartment if neccessary - } - - return _Return; - } - - std::vector< Agile<_Type*> > _Result; - }; - - template - struct _ResultHolder > - { - void Set(const std::pair<_Type*, size_t>& _type) - { - _M_Result = _type; - } - - std::pair<_Type*, size_t> Get() - { - return std::make_pair(_M_Result.first, _M_Result.second); - } - private: - std::pair, size_t> _M_Result; - }; -#else - template - struct _ResultContext - { - static _ContextCallback _GetContext(bool /* _RuntimeAggregate */) - { - return _ContextCallback(); - } - - static _Type _GetValue(_Type _ObjInCtx, const _ContextCallback & /* _Ctx */, bool /* _RuntimeAggregate */) - { - return _ObjInCtx; - } - }; - - template::value> - struct _MarshalHelper - { - }; - template - struct _MarshalHelper<_Type, N, true> - { - static _Type* _Perform(_Type(&_ObjInCtx)[N], const _ContextCallback& _Ctx) - { - static_assert(__is_valid_winrt_type(_Type*), "must be a WinRT array compatible type"); - if (_ObjInCtx == nullptr) - { - return nullptr; - } - - HRESULT _Hr; - IStream * _PStream; - _Ctx._CallInContext([&]() -> HRESULT { - // It isn't safe to simply reinterpret_cast a hat type to IUnknown* because some types do not have a real vtable ptr. - // Instead, we could to create a property value to make it "grow" the vtable ptr but instead primitives are not marshalled. - - IUnknown * _PUnk = winrt_array_type::create(_ObjInCtx, N); - _Hr = CoMarshalInterThreadInterfaceInStream(winrt_type<_Type>::getuuid(), _PUnk, &_PStream); - return S_OK; - }); - - // With an APPX manifest, this call should never fail. - _CONCRT_ASSERT(SUCCEEDED(_Hr)); - - _Type* _Proxy; - // - // Cannot use IID_PPV_ARGS with ^ types. - // - _Hr = CoGetInterfaceAndReleaseStream(_PStream, winrt_type<_Type>::getuuid(), reinterpret_cast(&_Proxy)); - if (FAILED(_Hr)) - { - throw std::make_exception_ptr(_Hr); - } - return _Proxy; - } - }; - template - struct _MarshalHelper<_Type, 0, false> - { - static _Type* _Perform(_Type* _ObjInCtx, const _ContextCallback& _Ctx) - { - static_assert(std::is_base_of::value || __is_valid_winrt_type(_Type), "must be a COM or WinRT type"); - if (_ObjInCtx == nullptr) - { - return nullptr; - } - - HRESULT _Hr; - IStream * _PStream; - _Ctx._CallInContext([&]() -> HRESULT { - // It isn't safe to simply reinterpret_cast a hat type to IUnknown* because some types do not have a real vtable ptr. - // Instead, we could to create a property value to make it "grow" the vtable ptr but instead primitives are not marshalled. - - IUnknown * _PUnk = winrt_type<_Type>::create(_ObjInCtx); - _Hr = CoMarshalInterThreadInterfaceInStream(winrt_type<_Type>::getuuid(), _PUnk, &_PStream); - return S_OK; - }); - - // With an APPX manifest, this call should never fail. - _CONCRT_ASSERT(SUCCEEDED(_Hr)); - - _Type* _Proxy; - // - // Cannot use IID_PPV_ARGS with ^ types. - // - _Hr = CoGetInterfaceAndReleaseStream(_PStream, winrt_type<_Type>::getuuid(), reinterpret_cast(&_Proxy)); - if (FAILED(_Hr)) - { - throw std::make_exception_ptr(_Hr); - } - return _Proxy; - } - }; - - // Arrays must be converted to IPropertyValue objects. - - template<> - struct _MarshalHelper - { - static HSTRING _Perform(HSTRING _ObjInCtx, const _ContextCallback& _Ctx) - { - return _ObjInCtx; - } - }; - - template - _Type* _Marshal(_Type* _ObjInCtx, const _ContextCallback& _Ctx) - { - return _MarshalHelper<_Type>::_Perform(_ObjInCtx, _Ctx); - } - - template - struct _InContext - { - static _Type _Get(_Type _ObjInCtx, const _ContextCallback& _Ctx) - { - return _ObjInCtx; - } - }; - - template - struct _InContext<_Type*> - { - static _Type* _Get(_Type* _ObjInCtx, const _ContextCallback& _Ctx) - { - _ContextCallback _CurrentContext = _ContextCallback::_CaptureCurrent(); - if (!_Ctx._HasCapturedContext() || _Ctx == _CurrentContext) - { - return _ObjInCtx; - } - - // - // The object is from another apartment. If it's marshalable, do so. - // - return _Marshal<_Type>(_ObjInCtx, _Ctx); - } - }; - - template - struct _ResultContext<_Type*> - { - static _Type* _GetValue(_Type* _ObjInCtx, const _ContextCallback& _Ctx, bool /* _RuntimeAggregate */) - { - return _InContext<_Type*>::_Get(_ObjInCtx, _Ctx); - } - - static _ContextCallback _GetContext(bool /* _RuntimeAggregate */) - { - return _ContextCallback::_CaptureCurrent(); - } - }; - - // - // The below are for composability with tasks auto-created from when_any / when_all / && / || constructs. - // - template - struct _ResultContext> - { - static std::vector<_Type*> _GetValue(std::vector<_Type*> _ObjInCtx, const _ContextCallback& _Ctx, bool _RuntimeAggregate) - { - if (!_RuntimeAggregate) - { - return _ObjInCtx; - } - - _ContextCallback _CurrentContext = _ContextCallback::_CaptureCurrent(); - if (!_Ctx._HasCapturedContext() || _Ctx == _CurrentContext) - { - return _ObjInCtx; - } - - for (auto _It = _ObjInCtx.begin(); _It != _ObjInCtx.end(); ++_It) - { - *_It = _Marshal<_Type>(*_It, _Ctx); - } - - return _ObjInCtx; - } - - static _ContextCallback _GetContext(bool _RuntimeAggregate) - { - if (!_RuntimeAggregate) - { - return _ContextCallback(); - } - else - { - return _ContextCallback::_CaptureCurrent(); - } - } - }; - - template - struct _ResultContext> - { - static std::pair<_Type*, size_t> _GetValue(std::pair<_Type*, size_t> _ObjInCtx, const _ContextCallback& _Ctx, bool _RuntimeAggregate) - { - if (!_RuntimeAggregate) - { - return _ObjInCtx; - } - - _ContextCallback _CurrentContext = _ContextCallback::_CaptureCurrent(); - if (!_Ctx._HasCapturedContext() || _Ctx == _CurrentContext) - { - return _ObjInCtx; - } - - return std::pair<_Type*, size_t>(_Marshal<_Type>(_ObjInCtx.first, _Ctx), _ObjInCtx.second); - } - - static _ContextCallback _GetContext(bool _RuntimeAggregate) - { - if (!_RuntimeAggregate) - { - return _ContextCallback(); - } - else - { - return _ContextCallback::_CaptureCurrent(); - } - } - }; -#endif - // An exception thrown by the task body is captured in an exception holder and it is shared with all value based continuations rooted at the task. - // The exception is 'observed' if the user invokes get()/wait() on any of the tasks that are sharing this exception holder. If the exception - // is not observed by the time the internal object owned by the shared pointer destructs, the process will fail fast. - struct _ExceptionHolder - { -#if _MSC_VER >= 1800 - private: - void ReportUnhandledError() - { - if (_M_winRTException != nullptr) - { - throw _M_winRTException.Get(); - } - } - public: - explicit _ExceptionHolder(const std::exception_ptr& _E, const _TaskCreationCallstack &_stackTrace) : - _M_exceptionObserved(0), _M_stdException(_E), _M_stackTrace(_stackTrace) - { - } - - explicit _ExceptionHolder(IRestrictedErrorInfo*& _E, const _TaskCreationCallstack &_stackTrace) : - _M_exceptionObserved(0), _M_winRTException(_E), _M_stackTrace(_stackTrace) - { - } -#else - explicit _ExceptionHolder(const std::exception_ptr& _E, void* _SourceAddressHint) : - _M_exceptionObserved(0), _M_stdException(_E), _M_disassembleMe(_SourceAddressHint) - { - } - - explicit _ExceptionHolder(IRestrictedErrorInfo*& _E, void* _SourceAddressHint) : - _M_exceptionObserved(0), _M_disassembleMe(_SourceAddressHint), _M_winRTException(_E) - { - } -#endif - __declspec(noinline) - ~_ExceptionHolder() - { - if (_M_exceptionObserved == 0) - { -#if _MSC_VER >= 1800 - // If you are trapped here, it means an exception thrown in task chain didn't get handled. - // Please add task-based continuation to handle all exceptions coming from tasks. - // this->_M_stackTrace keeps the creation callstack of the task generates this exception. - _REPORT_PPLTASK_UNOBSERVED_EXCEPTION(); -#else - // Disassemble at this->_M_disassembleMe to get to the source location right after either the creation of the task (constructor - // or then method) that encountered this exception, or the set_exception call for a task_completion_event. - Concurrency::details::_ReportUnobservedException(); -#endif - } - } - - void _RethrowUserException() - { - if (_M_exceptionObserved == 0) - { -#if _MSC_VER >= 1800 - Concurrency::details::atomic_exchange(_M_exceptionObserved, 1l); -#else - _InterlockedExchange(&_M_exceptionObserved, 1); -#endif - } - - if (_M_winRTException != nullptr) - { - throw _M_winRTException.Get(); - } - std::rethrow_exception(_M_stdException); - } - - // A variable that remembers if this exception was every rethrown into user code (and hence handled by the user). Exceptions that - // are unobserved when the exception holder is destructed will terminate the process. -#if _MSC_VER >= 1800 - Concurrency::details::atomic_long _M_exceptionObserved; -#else - long volatile _M_exceptionObserved; -#endif - - // Either _M_stdException or _M_winRTException is populated based on the type of exception encountered. - std::exception_ptr _M_stdException; - Microsoft::WRL::ComPtr _M_winRTException; - - // Disassembling this value will point to a source instruction right after a call instruction. If the call is to create_task, - // a task constructor or the then method, the task created by that method is the one that encountered this exception. If the call - // is to task_completion_event::set_exception, the set_exception method was the source of the exception. - // DO NOT REMOVE THIS VARIABLE. It is extremely helpful for debugging. -#if _MSC_VER >= 1800 - _TaskCreationCallstack _M_stackTrace; -#else - void* _M_disassembleMe; -#endif - }; - -#ifndef RUNTIMECLASS_Concurrency_winrt_details__AsyncInfoImpl_DEFINED -#define RUNTIMECLASS_Concurrency_winrt_details__AsyncInfoImpl_DEFINED - extern const __declspec(selectany) WCHAR RuntimeClass_Concurrency_winrt_details__AsyncInfoImpl[] = L"Concurrency_winrt.details._AsyncInfoImpl"; -#endif - - /// - /// Base converter class for converting asynchronous interfaces to IAsyncOperation - /// - template - struct _AsyncInfoImpl abstract : public Microsoft::WRL::RuntimeClass< - Microsoft::WRL::RuntimeClassFlags< Microsoft::WRL::RuntimeClassType::WinRt>, - Microsoft::WRL::Implements>> - { - InspectableClass(RuntimeClass_Concurrency_winrt_details__AsyncInfoImpl, BaseTrust) - public: - // The async action, action with progress or operation with progress that this stub forwards to. -#if _MSC_VER >= 1800 - Agile<_AsyncOperationType> _M_asyncInfo; -#else - Microsoft::WRL::ComPtr<_AsyncOperationType> _M_asyncInfo; - // The context in which this async info is valid - may be different from the context where the completion handler runs, - // and may require marshalling before it is used. - _ContextCallback _M_asyncInfoContext; -#endif - - Microsoft::WRL::ComPtr<_CompletionHandlerType> _M_CompletedHandler; - - _AsyncInfoImpl(_AsyncOperationType* _AsyncInfo) : _M_asyncInfo(_AsyncInfo) -#if _MSC_VER < 1800 - , _M_asyncInfoContext(_ContextCallback::_CaptureCurrent()) -#endif - {} - - public: - virtual HRESULT OnStart() { return S_OK; } - virtual void OnCancel() { - Microsoft::WRL::ComPtr pAsyncInfo; - HRESULT hr; -#if _MSC_VER >= 1800 - if (SUCCEEDED(hr = _M_asyncInfo.Get()->QueryInterface(pAsyncInfo.GetAddressOf()))) -#else - if (SUCCEEDED(hr = _M_asyncInfo.As(&pAsyncInfo))) -#endif - pAsyncInfo->Cancel(); - else - throw std::make_exception_ptr(hr); - } - virtual void OnClose() { - Microsoft::WRL::ComPtr pAsyncInfo; - HRESULT hr; -#if _MSC_VER >= 1800 - if (SUCCEEDED(hr = _M_asyncInfo.Get()->QueryInterface(pAsyncInfo.GetAddressOf()))) -#else - if (SUCCEEDED(hr = _M_asyncInfo.As(&pAsyncInfo))) -#endif - pAsyncInfo->Close(); - else - throw std::make_exception_ptr(hr); - } - - virtual STDMETHODIMP get_ErrorCode(HRESULT* errorCode) - { - Microsoft::WRL::ComPtr pAsyncInfo; - HRESULT hr; -#if _MSC_VER >= 1800 - if (SUCCEEDED(hr = _M_asyncInfo.Get()->QueryInterface(pAsyncInfo.GetAddressOf()))) -#else - if (SUCCEEDED(hr = _M_asyncInfo.As(&pAsyncInfo))) -#endif - return pAsyncInfo->get_ErrorCode(errorCode); - return hr; - } - - virtual STDMETHODIMP get_Id(UINT* id) - { - Microsoft::WRL::ComPtr pAsyncInfo; - HRESULT hr; -#if _MSC_VER >= 1800 - if (SUCCEEDED(hr = _M_asyncInfo.Get()->QueryInterface(pAsyncInfo.GetAddressOf()))) -#else - if (SUCCEEDED(hr = _M_asyncInfo.As(&pAsyncInfo))) -#endif - return pAsyncInfo->get_Id(id); - return hr; - } - - virtual STDMETHODIMP get_Status(ABI::Windows::Foundation::AsyncStatus *status) - { - Microsoft::WRL::ComPtr pAsyncInfo; - HRESULT hr; -#if _MSC_VER >= 1800 - if (SUCCEEDED(hr = _M_asyncInfo.Get()->QueryInterface(pAsyncInfo.GetAddressOf()))) -#else - if (SUCCEEDED(hr = _M_asyncInfo.As(&pAsyncInfo))) -#endif - return pAsyncInfo->get_Status(status); - return hr; - } - - virtual STDMETHODIMP GetResults(_Result_abi*) { throw std::runtime_error("derived class must implement"); } - - virtual STDMETHODIMP get_Completed(_CompletionHandlerType** handler) - { - if (!handler) return E_POINTER; - _M_CompletedHandler.CopyTo(handler); - return S_OK; - } - - virtual STDMETHODIMP put_Completed(_CompletionHandlerType* value) - { - _M_CompletedHandler = value; - Microsoft::WRL::ComPtr<_CompletionHandlerType> handler = Microsoft::WRL::Callback<_CompletionHandlerType>([&](_AsyncOperationType*, ABI::Windows::Foundation::AsyncStatus status) -> HRESULT { -#if _MSC_VER < 1800 - // Update the saved _M_asyncInfo with a proxy valid in the current context if required. Some Windows APIs return an IAsyncInfo - // that is only valid for the thread that called the API to retrieve. Since this completion handler can run on any thread, we - // need to ensure that the async info is valid in the current apartment. _M_asyncInfo will be accessed via calls to 'this' inside - // _AsyncInit. - _M_asyncInfo = _ResultContext<_AsyncOperationType*>::_GetValue(_M_asyncInfo.Get(), _M_asyncInfoContext, false); -#endif - return _M_CompletedHandler->Invoke(_M_asyncInfo.Get(), status); - }); -#if _MSC_VER >= 1800 - return _M_asyncInfo.Get()->put_Completed(handler.Get()); -#else - return _M_asyncInfo->put_Completed(handler.Get()); -#endif - } - }; - - extern const __declspec(selectany) WCHAR RuntimeClass_IAsyncOperationToAsyncOperationConverter[] = L"_IAsyncOperationToAsyncOperationConverter"; - - /// - /// Class _IAsyncOperationToAsyncOperationConverter is used to convert an instance of IAsyncOperationWithProgress into IAsyncOperation - /// - template - struct _IAsyncOperationToAsyncOperationConverter : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncOperationCompletedHandler<_Result>, - typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type> - { - typedef typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type _Result_abi; - - InspectableClass(RuntimeClass_IAsyncOperationToAsyncOperationConverter, BaseTrust) - public: - _IAsyncOperationToAsyncOperationConverter(ABI::Windows::Foundation::IAsyncOperation<_Result>* _Operation) : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncOperationCompletedHandler<_Result>, - _Result_abi>(_Operation) {} - public: - virtual STDMETHODIMP GetResults(_Result_abi* results) override { - if (!results) return E_POINTER; -#if _MSC_VER >= 1800 - return _M_asyncInfo.Get()->GetResults(results); -#else - return _M_asyncInfo->GetResults(results); -#endif - } - }; - - extern const __declspec(selectany) WCHAR RuntimeClass_IAsyncOperationWithProgressToAsyncOperationConverter[] = L"_IAsyncOperationWithProgressToAsyncOperationConverter"; - - /// - /// Class _IAsyncOperationWithProgressToAsyncOperationConverter is used to convert an instance of IAsyncOperationWithProgress into IAsyncOperation - /// - template - struct _IAsyncOperationWithProgressToAsyncOperationConverter : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncOperationWithProgressCompletedHandler<_Result, _Progress>, - typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type> - { - typedef typename ABI::Windows::Foundation::Internal::GetAbiType*>()))>::type _Result_abi; - - InspectableClass(RuntimeClass_IAsyncOperationWithProgressToAsyncOperationConverter, BaseTrust) - public: - _IAsyncOperationWithProgressToAsyncOperationConverter(ABI::Windows::Foundation::IAsyncOperationWithProgress<_Result, _Progress>* _Operation) : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncOperationWithProgressCompletedHandler<_Result, _Progress>, - _Result_abi>(_Operation) {} - public: - virtual STDMETHODIMP GetResults(_Result_abi* results) override { - if (!results) return E_POINTER; -#if _MSC_VER >= 1800 - return _M_asyncInfo.Get()->GetResults(results); -#else - return _M_asyncInfo->GetResults(results); -#endif - } - }; - - extern const __declspec(selectany) WCHAR RuntimeClass_IAsyncActionToAsyncOperationConverter[] = L"_IAsyncActionToAsyncOperationConverter"; - - /// - /// Class _IAsyncActionToAsyncOperationConverter is used to convert an instance of IAsyncAction into IAsyncOperation<_Unit_type> - /// - struct _IAsyncActionToAsyncOperationConverter : - _AsyncInfoImpl - { - InspectableClass(RuntimeClass_IAsyncActionToAsyncOperationConverter, BaseTrust) - public: - _IAsyncActionToAsyncOperationConverter(ABI::Windows::Foundation::IAsyncAction* _Operation) : - _AsyncInfoImpl(_Operation) {} - - public: - virtual STDMETHODIMP GetResults(details::_Unit_type* results) - { - if (!results) return E_POINTER; - // Invoke GetResults on the IAsyncAction to allow exceptions to be thrown to higher layers before returning a dummy value. -#if _MSC_VER >= 1800 - HRESULT hr = _M_asyncInfo.Get()->GetResults(); -#else - HRESULT hr = _M_asyncInfo->GetResults(); -#endif - if (SUCCEEDED(hr)) *results = _Unit_type(); - return hr; - } - }; - - extern const __declspec(selectany) WCHAR RuntimeClass_IAsyncActionWithProgressToAsyncOperationConverter[] = L"_IAsyncActionWithProgressToAsyncOperationConverter"; - - /// - /// Class _IAsyncActionWithProgressToAsyncOperationConverter is used to convert an instance of IAsyncActionWithProgress into IAsyncOperation<_Unit_type> - /// - template - struct _IAsyncActionWithProgressToAsyncOperationConverter : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncActionWithProgressCompletedHandler<_Progress>, - _Unit_type> - { - InspectableClass(RuntimeClass_IAsyncActionWithProgressToAsyncOperationConverter, BaseTrust) - public: - _IAsyncActionWithProgressToAsyncOperationConverter(ABI::Windows::Foundation::IAsyncActionWithProgress<_Progress>* _Action) : - _AsyncInfoImpl, - ABI::Windows::Foundation::IAsyncActionWithProgressCompletedHandler<_Progress>, - _Unit_type>(_Action) {} - public: - virtual STDMETHODIMP GetResults(_Unit_type* results) override - { - if (!results) return E_POINTER; - // Invoke GetResults on the IAsyncActionWithProgress to allow exceptions to be thrown before returning a dummy value. -#if _MSC_VER >= 1800 - HRESULT hr = _M_asyncInfo.Get()->GetResults(); -#else - HRESULT hr = _M_asyncInfo->GetResults(); -#endif - if (SUCCEEDED(hr)) *results = _Unit_type(); - return hr; - } - }; -} - -/// -/// The task_continuation_context class allows you to specify where you would like a continuation to be executed. -/// It is only useful to use this class from a Windows Store app. For non-Windows Store apps, the task continuation's -/// execution context is determined by the runtime, and not configurable. -/// -/// -/**/ -class task_continuation_context : public details::_ContextCallback -{ -public: - - /// - /// Creates the default task continuation context. - /// - /// - /// The default continuation context. - /// - /// - /// The default context is used if you don't specifiy a continuation context when you call the then method. In Windows - /// applications for Windows 7 and below, as well as desktop applications on Windows 8 and higher, the runtime determines where - /// task continuations will execute. However, in a Windows Store app, the default continuation context for a continuation on an - /// apartment aware task is the apartment where then is invoked. - /// An apartment aware task is a task that unwraps a Windows Runtime IAsyncInfo interface, or a task that is descended from such - /// a task. Therefore, if you schedule a continuation on an apartment aware task in a Windows Runtime STA, the continuation will execute in - /// that STA. - /// A continuation on a non-apartment aware task will execute in a context the Runtime chooses. - /// - /**/ - static task_continuation_context use_default() - { - // The callback context is created with the context set to CaptureDeferred and resolved when it is used in .then() - return task_continuation_context(true); // sets it to deferred, is resolved in the constructor of _ContinuationTaskHandle - } - - /// - /// Creates a task continuation context which allows the Runtime to choose the execution context for a continuation. - /// - /// - /// A task continuation context that represents an arbitrary location. - /// - /// - /// When this continuation context is used the continuation will execute in a context the runtime chooses even if the antecedent task - /// is apartment aware. - /// use_arbitrary can be used to turn off the default behavior for a continuation on an apartment - /// aware task created in an STA. - /// This method is only available to Windows Store apps. - /// - /**/ - static task_continuation_context use_arbitrary() - { - task_continuation_context _Arbitrary(true); - _Arbitrary._Resolve(false); - return _Arbitrary; - } - - /// - /// Returns a task continuation context object that represents the current execution context. - /// - /// - /// The current execution context. - /// - /// - /// This method captures the caller's Windows Runtime context so that continuations can be executed in the right apartment. - /// The value returned by use_current can be used to indicate to the Runtime that the continuation should execute in - /// the captured context (STA vs MTA) regardless of whether or not the antecedent task is apartment aware. An apartment aware task is - /// a task that unwraps a Windows Runtime IAsyncInfo interface, or a task that is descended from such a task. - /// This method is only available to Windows Store apps. - /// - /**/ - static task_continuation_context use_current() - { - task_continuation_context _Current(true); - _Current._Resolve(true); - return _Current; - } - -private: - - task_continuation_context(bool _DeferCapture = false) : details::_ContextCallback(_DeferCapture) - { - } -}; - -#if _MSC_VER >= 1800 -class task_options; -namespace details -{ - struct _Internal_task_options - { - bool _M_hasPresetCreationCallstack; - _TaskCreationCallstack _M_presetCreationCallstack; - - void _set_creation_callstack(const _TaskCreationCallstack &_callstack) - { - _M_hasPresetCreationCallstack = true; - _M_presetCreationCallstack = _callstack; - } - _Internal_task_options() - { - _M_hasPresetCreationCallstack = false; - } - }; - - inline _Internal_task_options &_get_internal_task_options(task_options &options); - inline const _Internal_task_options &_get_internal_task_options(const task_options &options); -} -/// -/// Represents the allowed options for creating a task -/// -class task_options -{ -public: - - - /// - /// Default list of task creation options - /// - task_options() - : _M_Scheduler(Concurrency::get_ambient_scheduler()), - _M_CancellationToken(Concurrency::cancellation_token::none()), - _M_ContinuationContext(task_continuation_context::use_default()), - _M_HasCancellationToken(false), - _M_HasScheduler(false) - { - } - - /// - /// Task option that specify a cancellation token - /// - task_options(Concurrency::cancellation_token _Token) - : _M_Scheduler(Concurrency::get_ambient_scheduler()), - _M_CancellationToken(_Token), - _M_ContinuationContext(task_continuation_context::use_default()), - _M_HasCancellationToken(true), - _M_HasScheduler(false) - { - } - - /// - /// Task option that specify a continuation context. This is valid only for continuations (then) - /// - task_options(task_continuation_context _ContinuationContext) - : _M_Scheduler(Concurrency::get_ambient_scheduler()), - _M_CancellationToken(Concurrency::cancellation_token::none()), - _M_ContinuationContext(_ContinuationContext), - _M_HasCancellationToken(false), - _M_HasScheduler(false) - { - } - - /// - /// Task option that specify a cancellation token and a continuation context. This is valid only for continuations (then) - /// - task_options(Concurrency::cancellation_token _Token, task_continuation_context _ContinuationContext) - : _M_Scheduler(Concurrency::get_ambient_scheduler()), - _M_CancellationToken(_Token), - _M_ContinuationContext(_ContinuationContext), - _M_HasCancellationToken(false), - _M_HasScheduler(false) - { - } - - /// - /// Task option that specify a scheduler with shared lifetime - /// - template - task_options(std::shared_ptr<_SchedType> _Scheduler) - : _M_Scheduler(std::move(_Scheduler)), - _M_CancellationToken(cancellation_token::none()), - _M_ContinuationContext(task_continuation_context::use_default()), - _M_HasCancellationToken(false), - _M_HasScheduler(true) - { - } - - /// - /// Task option that specify a scheduler reference - /// - task_options(Concurrency::scheduler_interface& _Scheduler) - : _M_Scheduler(&_Scheduler), - _M_CancellationToken(Concurrency::cancellation_token::none()), - _M_ContinuationContext(task_continuation_context::use_default()), - _M_HasCancellationToken(false), - _M_HasScheduler(true) - { - } - - /// - /// Task option that specify a scheduler - /// - task_options(Concurrency::scheduler_ptr _Scheduler) - : _M_Scheduler(std::move(_Scheduler)), - _M_CancellationToken(Concurrency::cancellation_token::none()), - _M_ContinuationContext(task_continuation_context::use_default()), - _M_HasCancellationToken(false), - _M_HasScheduler(true) - { - } - - /// - /// Task option copy constructor - /// - task_options(const task_options& _TaskOptions) - : _M_Scheduler(_TaskOptions.get_scheduler()), - _M_CancellationToken(_TaskOptions.get_cancellation_token()), - _M_ContinuationContext(_TaskOptions.get_continuation_context()), - _M_HasCancellationToken(_TaskOptions.has_cancellation_token()), - _M_HasScheduler(_TaskOptions.has_scheduler()) - { - } - - /// - /// Sets the given token in the options - /// - void set_cancellation_token(Concurrency::cancellation_token _Token) - { - _M_CancellationToken = _Token; - _M_HasCancellationToken = true; - } - - /// - /// Sets the given continuation context in the options - /// - void set_continuation_context(task_continuation_context _ContinuationContext) - { - _M_ContinuationContext = _ContinuationContext; - } - - /// - /// Indicates whether a cancellation token was specified by the user - /// - bool has_cancellation_token() const - { - return _M_HasCancellationToken; - } - - /// - /// Returns the cancellation token - /// - Concurrency::cancellation_token get_cancellation_token() const - { - return _M_CancellationToken; - } - - /// - /// Returns the continuation context - /// - task_continuation_context get_continuation_context() const - { - return _M_ContinuationContext; - } - - /// - /// Indicates whether a scheduler n was specified by the user - /// - bool has_scheduler() const - { - return _M_HasScheduler; - } - - /// - /// Returns the scheduler - /// - Concurrency::scheduler_ptr get_scheduler() const - { - return _M_Scheduler; - } - -private: - - task_options const& operator=(task_options const& _Right); - friend details::_Internal_task_options &details::_get_internal_task_options(task_options &); - friend const details::_Internal_task_options &details::_get_internal_task_options(const task_options &); - - Concurrency::scheduler_ptr _M_Scheduler; - Concurrency::cancellation_token _M_CancellationToken; - task_continuation_context _M_ContinuationContext; - details::_Internal_task_options _M_InternalTaskOptions; - bool _M_HasCancellationToken; - bool _M_HasScheduler; -}; -#endif - -namespace details -{ -#if _MSC_VER >= 1800 - inline _Internal_task_options & _get_internal_task_options(task_options &options) - { - return options._M_InternalTaskOptions; - } - inline const _Internal_task_options & _get_internal_task_options(const task_options &options) - { - return options._M_InternalTaskOptions; - } -#endif - struct _Task_impl_base; - template struct _Task_impl; - - template - struct _Task_ptr - { - typedef std::shared_ptr<_Task_impl<_ReturnType>> _Type; -#if _MSC_VER >= 1800 - static _Type _Make(Concurrency::details::_CancellationTokenState * _Ct, Concurrency::scheduler_ptr _Scheduler_arg) { return std::make_shared<_Task_impl<_ReturnType>>(_Ct, _Scheduler_arg); } -#else - static _Type _Make(Concurrency::details::_CancellationTokenState * _Ct) { return std::make_shared<_Task_impl<_ReturnType>>(_Ct); } -#endif - }; -#if _MSC_VER >= 1800 - typedef Concurrency::details::_TaskCollection_t::_TaskProcHandle_t _UnrealizedChore_t; - typedef _UnrealizedChore_t _UnrealizedChore; - typedef Concurrency::extensibility::scoped_critical_section_t scoped_lock; - typedef Concurrency::extensibility::critical_section_t critical_section; - typedef Concurrency::details::atomic_size_t atomic_size_t; -#else - typedef Concurrency::details::_UnrealizedChore _UnrealizedChore; - typedef Concurrency::critical_section::scoped_lock scoped_lock; - typedef Concurrency::critical_section critical_section; - typedef volatile size_t atomic_size_t; -#endif - typedef std::shared_ptr<_Task_impl_base> _Task_ptr_base; - // The weak-typed base task handler for continuation tasks. - struct _ContinuationTaskHandleBase : _UnrealizedChore - { - _ContinuationTaskHandleBase * _M_next; - task_continuation_context _M_continuationContext; - bool _M_isTaskBasedContinuation; - - // This field gives inlining scheduling policy for current chore. - _TaskInliningMode _M_inliningMode; - - virtual _Task_ptr_base _GetTaskImplBase() const = 0; - - _ContinuationTaskHandleBase() : - _M_next(nullptr), _M_isTaskBasedContinuation(false), _M_continuationContext(task_continuation_context::use_default()), _M_inliningMode(Concurrency::details::_NoInline) - { - } - virtual ~_ContinuationTaskHandleBase() {} - }; -#if _MSC_VER >= 1800 -#if _PPLTASK_ASYNC_LOGGING - // GUID used for identifying causality logs from PPLTask - const ::Platform::Guid _PPLTaskCausalityPlatformID(0x7A76B220, 0xA758, 0x4E6E, 0xB0, 0xE0, 0xD7, 0xC6, 0xD7, 0x4A, 0x88, 0xFE); - - __declspec(selectany) volatile long _isCausalitySupported = 0; - - inline bool _IsCausalitySupported() - { -#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) - if (_isCausalitySupported == 0) - { - long _causality = 1; - OSVERSIONINFOEX _osvi = {}; - _osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); - - // The Causality is supported on Windows version higher than Windows 8 - _osvi.dwMajorVersion = 6; - _osvi.dwMinorVersion = 3; - - DWORDLONG _conditionMask = 0; - VER_SET_CONDITION(_conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL); - VER_SET_CONDITION(_conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL); - - if (::VerifyVersionInfo(&_osvi, VER_MAJORVERSION | VER_MINORVERSION, _conditionMask)) - { - _causality = 2; - } - - _isCausalitySupported = _causality; - return _causality == 2; - } - - return _isCausalitySupported == 2 ? true : false; -#else - return true; -#endif - } - - // Stateful logger rests inside task_impl_base. - struct _TaskEventLogger - { - _Task_impl_base *_M_task; - bool _M_scheduled; - bool _M_taskPostEventStarted; - - // Log before scheduling task - void _LogScheduleTask(bool _isContinuation) - { - if (details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceOperationCreation(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - _PPLTaskCausalityPlatformID, reinterpret_cast(_M_task), - _isContinuation ? "Concurrency::PPLTask::ScheduleContinuationTask" : "Concurrency::PPLTask::ScheduleTask", 0); - _M_scheduled = true; - } - } - - // It will log the cancel event but not canceled state. _LogTaskCompleted will log the terminal state, which includes cancel state. - void _LogCancelTask() - { - if (details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceOperationRelation(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Important, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - _PPLTaskCausalityPlatformID, reinterpret_cast(_M_task), ::Windows::Foundation::Diagnostics::CausalityRelation::Cancel); - - } - } - - // Log when task reaches terminal state. Note: the task can reach a terminal state (by cancellation or exception) without having run - void _LogTaskCompleted(); - - // Log when task body (which includes user lambda and other scheduling code) begin to run - void _LogTaskExecutionStarted() { } - - // Log when task body finish executing - void _LogTaskExecutionCompleted() - { - if (_M_taskPostEventStarted && details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceSynchronousWorkCompletion(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - ::Windows::Foundation::Diagnostics::CausalitySynchronousWork::CompletionNotification); - } - } - - // Log right before user lambda being invoked - void _LogWorkItemStarted() - { - if (details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceSynchronousWorkStart(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - _PPLTaskCausalityPlatformID, reinterpret_cast(_M_task), ::Windows::Foundation::Diagnostics::CausalitySynchronousWork::Execution); - } - } - - // Log right after user lambda being invoked - void _LogWorkItemCompleted() - { - if (details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceSynchronousWorkCompletion(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - ::Windows::Foundation::Diagnostics::CausalitySynchronousWork::Execution); - - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceSynchronousWorkStart(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - _PPLTaskCausalityPlatformID, reinterpret_cast(_M_task), ::Windows::Foundation::Diagnostics::CausalitySynchronousWork::CompletionNotification); - _M_taskPostEventStarted = true; - } - } - - _TaskEventLogger(_Task_impl_base *_task) : _M_task(_task) - { - _M_scheduled = false; - _M_taskPostEventStarted = false; - } - }; - - // Exception safe logger for user lambda - struct _TaskWorkItemRAIILogger - { - _TaskEventLogger &_M_logger; - _TaskWorkItemRAIILogger(_TaskEventLogger &_taskHandleLogger) : _M_logger(_taskHandleLogger) - { - _M_logger._LogWorkItemStarted(); - } - - ~_TaskWorkItemRAIILogger() - { - _M_logger._LogWorkItemCompleted(); - } - _TaskWorkItemRAIILogger &operator =(const _TaskWorkItemRAIILogger &); // cannot be assigned - }; - -#else - inline void _LogCancelTask(_Task_impl_base *) {} - struct _TaskEventLogger - { - void _LogScheduleTask(bool) {} - void _LogCancelTask() {} - void _LogWorkItemStarted() {} - void _LogWorkItemCompleted() {} - void _LogTaskExecutionStarted() {} - void _LogTaskExecutionCompleted() {} - void _LogTaskCompleted() {} - _TaskEventLogger(_Task_impl_base *) {} - }; - struct _TaskWorkItemRAIILogger - { - _TaskWorkItemRAIILogger(_TaskEventLogger &) {} - }; -#endif -#endif - /// - /// The _PPLTaskHandle is the strong-typed task handle base. All user task functions need to be wrapped in this task handler - /// to be executable by PPL. By deriving from a different _BaseTaskHandle, it can be used for both initial tasks and continuation tasks. - /// For initial tasks, _PPLTaskHandle will be derived from _UnrealizedChore, and for continuation tasks, it will be derived from - /// _ContinuationTaskHandleBase. The life time of the _PPLTaskHandle object is be managed by runtime if task handle is scheduled. - /// - /// - /// The result type of the _Task_impl. - /// - /// - /// The derived task handle class. The operator () needs to be implemented. - /// - /// - /// The base class from which _PPLTaskHandle should be derived. This is either _UnrealizedChore or _ContinuationTaskHandleBase. - /// - template - struct _PPLTaskHandle : _BaseTaskHandle - { - _PPLTaskHandle(const typename _Task_ptr<_ReturnType>::_Type & _PTask) : _M_pTask(_PTask) - { -#if _MSC_VER < 1800 - m_pFunction = reinterpret_cast (&_UnrealizedChore::_InvokeBridge<_PPLTaskHandle>); - _SetRuntimeOwnsLifetime(true); -#endif - } - virtual ~_PPLTaskHandle() { -#if _MSC_VER >= 1800 - // Here is the sink of all task completion code paths - _M_pTask->_M_taskEventLogger._LogTaskCompleted(); -#endif - } -#if _MSC_VER >= 1800 - virtual void invoke() const -#else - void operator()() const -#endif - { - // All exceptions should be rethrown to finish cleanup of the task collection. They will be caught and handled - // by the runtime. - _CONCRT_ASSERT(_M_pTask != nullptr); - if (!_M_pTask->_TransitionedToStarted()) { -#if _MSC_VER >= 1800 - static_cast(this)->_SyncCancelAndPropagateException(); -#endif - return; - } -#if _MSC_VER >= 1800 - _M_pTask->_M_taskEventLogger._LogTaskExecutionStarted(); -#endif - try - { - // All derived task handle must implement this contract function. - static_cast(this)->_Perform(); - } - catch (const Concurrency::task_canceled &) - { - _M_pTask->_Cancel(true); -#if _MSC_VER < 1800 - throw; -#endif - } - catch (const Concurrency::details::_Interruption_exception &) - { - _M_pTask->_Cancel(true); -#if _MSC_VER < 1800 - throw; -#endif - } - catch (IRestrictedErrorInfo*& _E) - { - _M_pTask->_CancelWithException(_E); -#if _MSC_VER < 1800 - throw; -#endif - } - catch (...) - { - _M_pTask->_CancelWithException(std::current_exception()); -#if _MSC_VER < 1800 - throw; -#endif - } -#if _MSC_VER >= 1800 - _M_pTask->_M_taskEventLogger._LogTaskExecutionCompleted(); -#endif - } - - // Cast _M_pTask pointer to "type-less" _Task_impl_base pointer, which can be used in _ContinuationTaskHandleBase. - // The return value should be automatically optimized by R-value ref. - _Task_ptr_base _GetTaskImplBase() const - { - return _M_pTask; - } - - typename _Task_ptr<_ReturnType>::_Type _M_pTask; - - private: - _PPLTaskHandle const & operator=(_PPLTaskHandle const&); // no assignment operator - }; - - /// - /// The base implementation of a first-class task. This class contains all the non-type specific - /// implementation details of the task. - /// - /**/ - struct _Task_impl_base - { - enum _TaskInternalState - { - // Tracks the state of the task, rather than the task collection on which the task is scheduled - _Created, - _Started, - _PendingCancel, - _Completed, - _Canceled - }; -#if _MSC_VER >= 1800 - _Task_impl_base(Concurrency::details::_CancellationTokenState * _PTokenState, Concurrency::scheduler_ptr _Scheduler_arg) - : _M_TaskState(_Created), - _M_fFromAsync(false), _M_fUnwrappedTask(false), - _M_pRegistration(nullptr), _M_Continuations(nullptr), _M_TaskCollection(_Scheduler_arg), - _M_taskEventLogger(this) -#else - _Task_impl_base(Concurrency::details::_CancellationTokenState * _PTokenState) : _M_TaskState(_Created), - _M_fFromAsync(false), _M_fRuntimeAggregate(false), _M_fUnwrappedTask(false), - _M_pRegistration(nullptr), _M_Continuations(nullptr), _M_pTaskCollection(nullptr), - _M_pTaskCreationAddressHint(nullptr) -#endif - { - // Set cancelation token - _M_pTokenState = _PTokenState; - _CONCRT_ASSERT(_M_pTokenState != nullptr); - if (_M_pTokenState != Concurrency::details::_CancellationTokenState::_None()) - _M_pTokenState->_Reference(); - - } - - virtual ~_Task_impl_base() - { - _CONCRT_ASSERT(_M_pTokenState != nullptr); - if (_M_pTokenState != Concurrency::details::_CancellationTokenState::_None()) - { - _M_pTokenState->_Release(); - } -#if _MSC_VER < 1800 - if (_M_pTaskCollection != nullptr) - { - _M_pTaskCollection->_Release(); - _M_pTaskCollection = nullptr; - } -#endif - } - - task_status _Wait() - { - bool _DoWait = true; - - if (_IsNonBlockingThread()) - { - // In order to prevent Windows Runtime STA threads from blocking the UI, calling task.wait() task.get() is illegal - // if task has not been completed. - if (!_IsCompleted() && !_IsCanceled()) - { - throw Concurrency::invalid_operation("Illegal to wait on a task in a Windows Runtime STA"); - } - else - { - // Task Continuations are 'scheduled' *inside* the chore that is executing on the ancestors's task group. If a continuation - // needs to be marshalled to a different apartment, instead of scheduling, we make a synchronous cross apartment COM - // call to execute the continuation. If it then happens to do something which waits on the ancestor (say it calls .get(), which - // task based continuations are wont to do), waiting on the task group results in on the chore that is making this - // synchronous callback, which causes a deadlock. To avoid this, we test the state ancestor's event , and we will NOT wait on - // if it has finished execution (which means now we are on the inline synchronous callback). - _DoWait = false; - } - } - if (_DoWait) - { -#if _MSC_VER < 1800 - // Wait for the task to be actually scheduled, otherwise the underlying task collection - // might not be created yet. If we don't wait, we will miss the chance to inline this task. - _M_Scheduled.wait(); - - - // A PPL task created by a task_completion_event does not have an underlying TaskCollection. For - // These tasks, a call to wait should wait for the event to be set. The TaskCollection must either - // be nullptr or allocated (the setting of _M_Scheduled) ensures that. -#endif - // If this task was created from a Windows Runtime async operation, do not attempt to inline it. The - // async operation will take place on a thread in the appropriate apartment Simply wait for the completed - // event to be set. -#if _MSC_VER >= 1800 - if (_M_fFromAsync) -#else - if ((_M_pTaskCollection == nullptr) || _M_fFromAsync) -#endif - { -#if _MSC_VER >= 1800 - _M_TaskCollection._Wait(); -#else - _M_Completed.wait(); -#endif - } - else - { - // Wait on the task collection to complete. The task collection is guaranteed to still be - // valid since the task must be still within scope so that the _Task_impl_base destructor - // has not yet been called. This call to _Wait potentially inlines execution of work. - try - { - // Invoking wait on a task collection resets the state of the task collection. This means that - // if the task collection itself were canceled, or had encountered an exception, only the first - // call to wait will receive this status. However, both cancellation and exceptions flowing through - // tasks set state in the task impl itself. - - // When it returns cancelled, either work chore or the cancel thread should already have set task's state - // properly -- cancelled state or completed state (because there was no interruption point). - // For tasks with unwrapped tasks, we should not change the state of current task, since the unwrapped task are still running. -#if _MSC_VER >= 1800 - _M_TaskCollection._RunAndWait(); -#else - _M_pTaskCollection->_RunAndWait(); -#endif - } - catch (Concurrency::details::_Interruption_exception&) - { - // The _TaskCollection will never be an interruption point since it has a none token. - _CONCRT_ASSERT(false); - } - catch (Concurrency::task_canceled&) - { - // task_canceled is a special exception thrown by cancel_current_task. The spec states that cancel_current_task - // must be called from code that is executed within the task (throwing it from parallel work created by and waited - // upon by the task is acceptable). We can safely assume that the task wrapper _PPLTaskHandle::operator() has seen - // the exception and canceled the task. Swallow the exception here. - _CONCRT_ASSERT(_IsCanceled()); - } - catch (IRestrictedErrorInfo*& _E) - { - // Its possible the task body hasn't seen the exception, if so we need to cancel with exception here. - if(!_HasUserException()) - { - _CancelWithException(_E); - } - // Rethrow will mark the exception as observed. - _M_exceptionHolder->_RethrowUserException(); - } - catch (...) - { - // Its possible the task body hasn't seen the exception, if so we need to cancel with exception here. - if (!_HasUserException()) - { - _CancelWithException(std::current_exception()); - } - // Rethrow will mark the exception as observed. - _M_exceptionHolder->_RethrowUserException(); - } - - // If the lambda body for this task (executed or waited upon in _RunAndWait above) happened to return a task - // which is to be unwrapped and plumbed to the output of this task, we must not only wait on the lambda body, we must - // wait on the **INNER** body. It is in theory possible that we could inline such if we plumb a series of things through; - // however, this takes the tact of simply waiting upon the completion signal. - if (_M_fUnwrappedTask) - { -#if _MSC_VER >= 1800 - _M_TaskCollection._Wait(); -#else - _M_Completed.wait(); -#endif - } - } - } - - if (_HasUserException()) - { - _M_exceptionHolder->_RethrowUserException(); - } - else if (_IsCanceled()) - { - return Concurrency::canceled; - } - _CONCRT_ASSERT(_IsCompleted()); - return Concurrency::completed; - } - /// - /// Requests cancellation on the task and schedules continuations if the task can be transitioned to a terminal state. - /// - /// - /// Set to true if the cancel takes place as a result of the task body encountering an exception, or because an ancestor or task_completion_event the task - /// was registered with were canceled with an exception. A synchronous cancel is one that assures the task could not be running on a different thread at - /// the time the cancellation is in progress. An asynchronous cancel is one where the thread performing the cancel has no control over the thread that could - /// be executing the task, that is the task could execute concurrently while the cancellation is in progress. - /// - /// - /// Whether an exception other than the internal runtime cancellation exceptions caused this cancellation. - /// - /// - /// Whether this exception came from an ancestor task or a task_completion_event as opposed to an exception that was encountered by the task itself. Only valid when - /// _UserException is set to true. - /// - /// - /// The exception holder that represents the exception. Only valid when _UserException is set to true. - /// - virtual bool _CancelAndRunContinuations(bool _SynchronousCancel, bool _UserException, bool _PropagatedFromAncestor, const std::shared_ptr<_ExceptionHolder>& _ExHolder) = 0; - - bool _Cancel(bool _SynchronousCancel) - { - // Send in a dummy value for exception. It is not used when the first parameter is false. - return _CancelAndRunContinuations(_SynchronousCancel, false, false, _M_exceptionHolder); - } - - bool _CancelWithExceptionHolder(const std::shared_ptr<_ExceptionHolder>& _ExHolder, bool _PropagatedFromAncestor) - { - // This task was canceled because an ancestor task encountered an exception. - return _CancelAndRunContinuations(true, true, _PropagatedFromAncestor, _ExHolder); - } - - bool _CancelWithException(IRestrictedErrorInfo*& _Exception) - { - // This task was canceled because the task body encountered an exception. - _CONCRT_ASSERT(!_HasUserException()); -#if _MSC_VER >= 1800 - return _CancelAndRunContinuations(true, true, false, std::make_shared<_ExceptionHolder>(_Exception, _GetTaskCreationCallstack())); -#else - return _CancelAndRunContinuations(true, true, false, std::make_shared<_ExceptionHolder>(_Exception, _GetTaskCreationAddressHint())); -#endif - } - bool _CancelWithException(const std::exception_ptr& _Exception) - { - // This task was canceled because the task body encountered an exception. - _CONCRT_ASSERT(!_HasUserException()); -#if _MSC_VER >= 1800 - return _CancelAndRunContinuations(true, true, false, std::make_shared<_ExceptionHolder>(_Exception, _GetTaskCreationCallstack())); -#else - return _CancelAndRunContinuations(true, true, false, std::make_shared<_ExceptionHolder>(_Exception, _GetTaskCreationAddressHint())); -#endif - } - -#if _MSC_VER >= 1800 - void _RegisterCancellation(std::weak_ptr<_Task_impl_base> _WeakPtr) -#else - void _RegisterCancellation() -#endif - { - _CONCRT_ASSERT(Concurrency::details::_CancellationTokenState::_IsValid(_M_pTokenState)); -#if _MSC_VER >= 1800 - auto _CancellationCallback = [_WeakPtr](){ - // Taking ownership of the task prevents dead lock during destruction - // if the destructor waits for the cancellations to be finished - auto _task = _WeakPtr.lock(); - if (_task != nullptr) - _task->_Cancel(false); - }; - - _M_pRegistration = new Concurrency::details::_CancellationTokenCallback(_CancellationCallback); - _M_pTokenState->_RegisterCallback(_M_pRegistration); -#else - _M_pRegistration = _M_pTokenState->_RegisterCallback(reinterpret_cast(&_CancelViaToken), (_Task_impl_base *)this); -#endif - } - - void _DeregisterCancellation() - { - if (_M_pRegistration != nullptr) - { - _M_pTokenState->_DeregisterCallback(_M_pRegistration); - _M_pRegistration->_Release(); - _M_pRegistration = nullptr; - } - } -#if _MSC_VER < 1800 - static void _CancelViaToken(_Task_impl_base *_PImpl) - { - _PImpl->_Cancel(false); - } -#endif - bool _IsCreated() - { - return (_M_TaskState == _Created); - } - - bool _IsStarted() - { - return (_M_TaskState == _Started); - } - - bool _IsPendingCancel() - { - return (_M_TaskState == _PendingCancel); - } - - bool _IsCompleted() - { - return (_M_TaskState == _Completed); - } - - bool _IsCanceled() - { - return (_M_TaskState == _Canceled); - } - - bool _HasUserException() - { - return static_cast(_M_exceptionHolder); - } -#if _MSC_VER < 1800 - void _SetScheduledEvent() - { - _M_Scheduled.set(); - } -#endif - const std::shared_ptr<_ExceptionHolder>& _GetExceptionHolder() - { - _CONCRT_ASSERT(_HasUserException()); - return _M_exceptionHolder; - } - - bool _IsApartmentAware() - { - return _M_fFromAsync; - } - - void _SetAsync(bool _Async = true) - { - _M_fFromAsync = _Async; - } -#if _MSC_VER >= 1800 - _TaskCreationCallstack _GetTaskCreationCallstack() - { - return _M_pTaskCreationCallstack; - } - - void _SetTaskCreationCallstack(const _TaskCreationCallstack &_Callstack) - { - _M_pTaskCreationCallstack = _Callstack; - } -#else - void* _GetTaskCreationAddressHint() - { - return _M_pTaskCreationAddressHint; - } - - void _SetTaskCreationAddressHint(void* _AddressHint) - { - _M_pTaskCreationAddressHint = _AddressHint; - } -#endif - /// - /// Helper function to schedule the task on the Task Collection. - /// - /// - /// The task chore handle that need to be executed. - /// - /// - /// The inlining scheduling policy for current _PTaskHandle. - /// - void _ScheduleTask(_UnrealizedChore * _PTaskHandle, _TaskInliningMode _InliningMode) - { -#if _MSC_VER < 1800 - // Construct the task collection; We use none token to provent it becoming interruption point. - _M_pTaskCollection = Concurrency::details::_AsyncTaskCollection::_NewCollection(Concurrency::details::_CancellationTokenState::_None()); - // _M_pTaskCollection->_ScheduleWithAutoInline will schedule the chore onto AsyncTaskCollection with automatic inlining, in a way that honors cancellation etc. -#endif - try - { -#if _MSC_VER >= 1800 - _M_TaskCollection._ScheduleTask(_PTaskHandle, _InliningMode); -#else - // Do not need to check its returning state, more details please refer to _Wait method. - _M_pTaskCollection->_ScheduleWithAutoInline(_PTaskHandle, _InliningMode); -#endif - } - catch (const Concurrency::task_canceled &) - { - // task_canceled is a special exception thrown by cancel_current_task. The spec states that cancel_current_task - // must be called from code that is executed within the task (throwing it from parallel work created by and waited - // upon by the task is acceptable). We can safely assume that the task wrapper _PPLTaskHandle::operator() has seen - // the exception and canceled the task. Swallow the exception here. - _CONCRT_ASSERT(_IsCanceled()); - } - catch (const Concurrency::details::_Interruption_exception &) - { - // The _TaskCollection will never be an interruption point since it has a none token. - _CONCRT_ASSERT(false); - } - catch (...) - { - // This exception could only have come from within the chore body. It should've been caught - // and the task should be canceled with exception. Swallow the exception here. - _CONCRT_ASSERT(_HasUserException()); - } -#if _MSC_VER < 1800 - // Set the event in case anyone is waiting to notify that this task has been scheduled. In the case where we - // execute the chore inline, the event should be set after the chore has executed, to prevent a different thread - // performing a wait on the task from waiting on the task collection before the chore is actually added to it, - // and thereby returning from the wait() before the chore has executed. - _SetScheduledEvent(); -#endif - } - - /// - /// Function executes a continuation. This function is recorded by a parent task implementation - /// when a continuation is created in order to execute later. - /// - /// - /// The continuation task chore handle that need to be executed. - /// - /**/ - void _RunContinuation(_ContinuationTaskHandleBase * _PTaskHandle) - { - _Task_ptr_base _ImplBase = _PTaskHandle->_GetTaskImplBase(); - if (_IsCanceled() && !_PTaskHandle->_M_isTaskBasedContinuation) - { - if (_HasUserException()) - { - // If the ancestor encountered an exception, transfer the exception to the continuation - // This traverses down the tree to propagate the exception. - _ImplBase->_CancelWithExceptionHolder(_GetExceptionHolder(), true); - } - else - { - // If the ancestor was canceled, then your own execution should be canceled. - // This traverses down the tree to cancel it. - _ImplBase->_Cancel(true); - } - } - else - { - // This can only run when the ancestor has completed or it's a task based continuation that fires when a task is canceled - // (with or without a user exception). - _CONCRT_ASSERT(_IsCompleted() || _PTaskHandle->_M_isTaskBasedContinuation); - -#if _MSC_VER >= 1800 - _CONCRT_ASSERT(!_ImplBase->_IsCanceled()); - return _ImplBase->_ScheduleContinuationTask(_PTaskHandle); -#else - // If it has been canceled here (before starting), do nothing. The guy firing cancel will do the clean up. - if (!_ImplBase->_IsCanceled()) - { - return _ImplBase->_ScheduleContinuationTask(_PTaskHandle); - } -#endif - } - - // If the handle is not scheduled, we need to manually delete it. - delete _PTaskHandle; - } - - // Schedule a continuation to run - void _ScheduleContinuationTask(_ContinuationTaskHandleBase * _PTaskHandle) - { -#if _MSC_VER >= 1800 - _M_taskEventLogger._LogScheduleTask(true); -#endif - // Ensure that the continuation runs in proper context (this might be on a Concurrency Runtime thread or in a different Windows Runtime apartment) - if (_PTaskHandle->_M_continuationContext._HasCapturedContext()) - { - // For those continuations need to be scheduled inside captured context, we will try to apply automatic inlining to their inline modes, - // if they haven't been specified as _ForceInline yet. This change will encourage those continuations to be executed inline so that reduce - // the cost of marshaling. - // For normal continuations we won't do any change here, and their inline policies are completely decided by ._ThenImpl method. - if (_PTaskHandle->_M_inliningMode != Concurrency::details::_ForceInline) - { - _PTaskHandle->_M_inliningMode = Concurrency::details::_DefaultAutoInline; - } - details::_ScheduleFuncWithAutoInline([_PTaskHandle]() -> HRESULT { - // Note that we cannot directly capture "this" pointer, instead, we should use _TaskImplPtr, a shared_ptr to the _Task_impl_base. - // Because "this" pointer will be invalid as soon as _PTaskHandle get deleted. _PTaskHandle will be deleted after being scheduled. - auto _TaskImplPtr = _PTaskHandle->_GetTaskImplBase(); - if (details::_ContextCallback::_CaptureCurrent() == _PTaskHandle->_M_continuationContext) - { - _TaskImplPtr->_ScheduleTask(_PTaskHandle, Concurrency::details::_ForceInline); - } - else - { - // - // It's entirely possible that the attempt to marshal the call into a differing context will fail. In this case, we need to handle - // the exception and mark the continuation as canceled with the appropriate exception. There is one slight hitch to this: - // - // NOTE: COM's legacy behavior is to swallow SEH exceptions and marshal them back as HRESULTS. This will in effect turn an SEH into - // a C++ exception that gets tagged on the task. One unfortunate result of this is that various pieces of the task infrastructure will - // not be in a valid state after this in /EHsc (due to the lack of destructors running, etc...). - // - try - { - // Dev10 compiler needs this! - auto _PTaskHandle1 = _PTaskHandle; - _PTaskHandle->_M_continuationContext._CallInContext([_PTaskHandle1, _TaskImplPtr]() -> HRESULT { - _TaskImplPtr->_ScheduleTask(_PTaskHandle1, Concurrency::details::_ForceInline); - return S_OK; - }); - } - catch (IRestrictedErrorInfo*& _E) - { - _TaskImplPtr->_CancelWithException(_E); - } - catch (...) - { - _TaskImplPtr->_CancelWithException(std::current_exception()); - } - } - return S_OK; - }, _PTaskHandle->_M_inliningMode); - } - else - { - _ScheduleTask(_PTaskHandle, _PTaskHandle->_M_inliningMode); - } - } - - /// - /// Schedule the actual continuation. This will either schedule the function on the continuation task's implementation - /// if the task has completed or append it to a list of functions to execute when the task actually does complete. - /// - /// - /// The input type of the task. - /// - /// - /// The output type of the task. - /// - /**/ - void _ScheduleContinuation(_ContinuationTaskHandleBase * _PTaskHandle) - { - enum { _Nothing, _Schedule, _Cancel, _CancelWithException } _Do = _Nothing; - - // If the task has canceled, cancel the continuation. If the task has completed, execute the continuation right away. - // Otherwise, add it to the list of pending continuations - { - scoped_lock _LockHolder(_M_ContinuationsCritSec); - if (_IsCompleted() || (_IsCanceled() && _PTaskHandle->_M_isTaskBasedContinuation)) - { - _Do = _Schedule; - } - else if (_IsCanceled()) - { - if (_HasUserException()) - { - _Do = _CancelWithException; - } - else - { - _Do = _Cancel; - } - } - else - { - // chain itself on the continuation chain. - _PTaskHandle->_M_next = _M_Continuations; - _M_Continuations = _PTaskHandle; - } - } - - // Cancellation and execution of continuations should be performed after releasing the lock. Continuations off of - // async tasks may execute inline. - switch (_Do) - { - case _Schedule: - { - _PTaskHandle->_GetTaskImplBase()->_ScheduleContinuationTask(_PTaskHandle); - break; - } - case _Cancel: - { - // If the ancestor was canceled, then your own execution should be canceled. - // This traverses down the tree to cancel it. - _PTaskHandle->_GetTaskImplBase()->_Cancel(true); - - delete _PTaskHandle; - break; - } - case _CancelWithException: - { - // If the ancestor encountered an exception, transfer the exception to the continuation - // This traverses down the tree to propagate the exception. - _PTaskHandle->_GetTaskImplBase()->_CancelWithExceptionHolder(_GetExceptionHolder(), true); - - delete _PTaskHandle; - break; - } - case _Nothing: - default: - // In this case, we have inserted continuation to continuation chain, - // nothing more need to be done, just leave. - break; - } - } - - void _RunTaskContinuations() - { - // The link list can no longer be modified at this point, - // since all following up continuations will be scheduled by themselves. - _ContinuationList _Cur = _M_Continuations, _Next; - _M_Continuations = nullptr; - while (_Cur) - { - // Current node might be deleted after running, - // so we must fetch the next first. - _Next = _Cur->_M_next; - _RunContinuation(_Cur); - _Cur = _Next; - } - } - static bool _IsNonBlockingThread() - { - APTTYPE _AptType; - APTTYPEQUALIFIER _AptTypeQualifier; - - HRESULT hr = CoGetApartmentType(&_AptType, &_AptTypeQualifier); - // - // If it failed, it's not a Windows Runtime/COM initialized thread. This is not a failure. - // - if (SUCCEEDED(hr)) - { - switch (_AptType) - { - case APTTYPE_STA: - case APTTYPE_MAINSTA: - return true; - break; - case APTTYPE_NA: - switch (_AptTypeQualifier) - { - // A thread executing in a neutral apartment is either STA or MTA. To find out if this thread is allowed - // to wait, we check the app qualifier. If it is an STA thread executing in a neutral apartment, waiting - // is illegal, because the thread is responsible for pumping messages and waiting on a task could take the - // thread out of circulation for a while. - case APTTYPEQUALIFIER_NA_ON_STA: - case APTTYPEQUALIFIER_NA_ON_MAINSTA: - return true; - break; - } - break; - } - } -#if _UITHREADCTXT_SUPPORT - // This method is used to throw an exepection in _Wait() if called within STA. We - // want the same behavior if _Wait is called on the UI thread. - if (SUCCEEDED(CaptureUiThreadContext(nullptr))) - { - return true; - } -#endif // _UITHREADCTXT_SUPPORT - - return false; - } - - template - static void _AsyncInit(const typename _Task_ptr<_ReturnType>::_Type & _OuterTask, - _AsyncInfoImpl<_OpType, _CompHandlerType, _ResultType>* _AsyncOp) - { - typedef typename ABI::Windows::Foundation::Internal::GetAbiType()))>::type _Result_abi; - // This method is invoked either when a task is created from an existing async operation or - // when a lambda that creates an async operation executes. - - // If the outer task is pending cancel, cancel the async operation before setting the completed handler. The COM reference on - // the IAsyncInfo object will be released when all *references to the operation go out of scope. - - // This assertion uses the existence of taskcollection to determine if the task was created from an event. - // That is no longer valid as even tasks created from a user lambda could have no underlying taskcollection - // when a custom scheduler is used. -#if _MSC_VER < 1800 - _CONCRT_ASSERT(((_OuterTask->_M_pTaskCollection == nullptr) || _OuterTask->_M_fUnwrappedTask) && !_OuterTask->_IsCanceled()); -#endif - - // Pass the shared_ptr by value into the lambda instead of using 'this'. - - _AsyncOp->put_Completed(Microsoft::WRL::Callback<_CompHandlerType>( - [_OuterTask, _AsyncOp](_OpType* _Operation, ABI::Windows::Foundation::AsyncStatus _Status) mutable -> HRESULT - { - HRESULT hr = S_OK; - if (_Status == ABI::Windows::Foundation::AsyncStatus::Canceled) - { - _OuterTask->_Cancel(true); - } - else if (_Status == ABI::Windows::Foundation::AsyncStatus::Error) - { - HRESULT _hr; - Microsoft::WRL::ComPtr pAsyncInfo; - if (SUCCEEDED(hr = _Operation->QueryInterface(pAsyncInfo.GetAddressOf())) && SUCCEEDED(hr = pAsyncInfo->get_ErrorCode(&_hr))) - _OuterTask->_CancelWithException(std::make_exception_ptr(_hr)); - } - else - { - _CONCRT_ASSERT(_Status == ABI::Windows::Foundation::AsyncStatus::Completed); - _NormalizeVoidToUnitType<_Result_abi>::_Type results; - if (SUCCEEDED(hr = _AsyncOp->GetResults(&results))) - _OuterTask->_FinalizeAndRunContinuations(results); - } - // Take away this shared pointers reference on the task instead of waiting for the delegate to be released. It could - // be released on a different thread after a delay, and not releasing the reference here could cause the tasks to hold - // on to resources longer than they should. As an example, without this reset, writing to a file followed by reading from - // it using the Windows Runtime Async APIs causes a sharing violation. - // Using const_cast is the workaround for failed mutable keywords - const_cast<_Task_ptr<_ReturnType>::_Type &>(_OuterTask).reset(); - return hr; - }).Get()); - _OuterTask->_SetUnwrappedAsyncOp(_AsyncOp); - } - template - static void _AsyncInit(const typename _Task_ptr<_ReturnType>::_Type& _OuterTask, const task<_InternalReturnType> & _UnwrappedTask) - { - _CONCRT_ASSERT(_OuterTask->_M_fUnwrappedTask && !_OuterTask->_IsCanceled()); - // - // We must ensure that continuations off _OuterTask (especially exception handling ones) continue to function in the - // presence of an exception flowing out of the inner task _UnwrappedTask. This requires an exception handling continuation - // off the inner task which does the appropriate funnelling to the outer one. We use _Then instead of then to prevent - // the exception from being marked as observed by our internal continuation. This continuation must be scheduled regardless - // of whether or not the _OuterTask task is canceled. - // - _UnwrappedTask._Then([_OuterTask](task<_InternalReturnType> _AncestorTask) -> HRESULT { - - if (_AncestorTask._GetImpl()->_IsCompleted()) - { - _OuterTask->_FinalizeAndRunContinuations(_AncestorTask._GetImpl()->_GetResult()); - } - else - { - _CONCRT_ASSERT(_AncestorTask._GetImpl()->_IsCanceled()); - if (_AncestorTask._GetImpl()->_HasUserException()) - { - // Set _PropagatedFromAncestor to false, since _AncestorTask is not an ancestor of _UnwrappedTask. - // Instead, it is the enclosing task. - _OuterTask->_CancelWithExceptionHolder(_AncestorTask._GetImpl()->_GetExceptionHolder(), false); - } - else - { - _OuterTask->_Cancel(true); - } - } - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr, Concurrency::details::_DefaultAutoInline); -#else - }, nullptr, false, Concurrency::details::_DefaultAutoInline); -#endif - } - -#if _MSC_VER >= 1800 - Concurrency::scheduler_ptr _GetScheduler() const - { - return _M_TaskCollection._GetScheduler(); - } -#else - Concurrency::event _M_Completed; - Concurrency::event _M_Scheduled; -#endif - - // Tracks the internal state of the task - volatile _TaskInternalState _M_TaskState; - // Set to true either if the ancestor task had the flag set to true, or if the lambda that does the work of this task returns an - // async operation or async action that is unwrapped by the runtime. - bool _M_fFromAsync; -#if _MSC_VER < 1800 - // Set to true if we need to marshal the inner parts of an aggregate type like std::vector or std::pair. We only marshal - // the contained T^s if we create the vector or pair, such as on a when_any or a when_all operation. - bool _M_fRuntimeAggregate; -#endif - // Set to true when a continuation unwraps a task or async operation. - bool _M_fUnwrappedTask; - - // An exception thrown by the task body is captured in an exception holder and it is shared with all value based continuations rooted at the task. - // The exception is 'observed' if the user invokes get()/wait() on any of the tasks that are sharing this exception holder. If the exception - // is not observed by the time the internal object owned by the shared pointer destructs, the process will fail fast. - std::shared_ptr<_ExceptionHolder> _M_exceptionHolder; - - typedef _ContinuationTaskHandleBase * _ContinuationList; - - critical_section _M_ContinuationsCritSec; - _ContinuationList _M_Continuations; - - // The cancellation token state. - Concurrency::details::_CancellationTokenState * _M_pTokenState; - - // The registration on the token. - Concurrency::details::_CancellationTokenRegistration * _M_pRegistration; - - // The async task collection wrapper -#if _MSC_VER >= 1800 - Concurrency::details::_TaskCollection_t _M_TaskCollection; - - // Callstack for function call (constructor or .then) that created this task impl. - _TaskCreationCallstack _M_pTaskCreationCallstack; - - _TaskEventLogger _M_taskEventLogger; -#else - Concurrency::details::_AsyncTaskCollection * _M_pTaskCollection; - - // Points to the source code instruction right after the function call (constructor or .then) that created this task impl. - void* _M_pTaskCreationAddressHint; -#endif - - private: - // Must not be copied by value: - _Task_impl_base(const _Task_impl_base&); - _Task_impl_base const & operator=(_Task_impl_base const&); - }; - -#if _MSC_VER >= 1800 -#if _PPLTASK_ASYNC_LOGGING - inline void _TaskEventLogger::_LogTaskCompleted() - { - if (_M_scheduled) - { - ::Windows::Foundation::AsyncStatus _State; - if (_M_task->_IsCompleted()) - _State = ::Windows::Foundation::AsyncStatus::Completed; - else if (_M_task->_HasUserException()) - _State = ::Windows::Foundation::AsyncStatus::Error; - else - _State = ::Windows::Foundation::AsyncStatus::Canceled; - - if (details::_IsCausalitySupported()) - { - ::Windows::Foundation::Diagnostics::AsyncCausalityTracer::TraceOperationCompletion(::Windows::Foundation::Diagnostics::CausalityTraceLevel::Required, ::Windows::Foundation::Diagnostics::CausalitySource::Library, - _PPLTaskCausalityPlatformID, reinterpret_cast(_M_task), _State); - } - } - } -#endif -#endif - - template - struct _Task_impl : public _Task_impl_base - { - typedef ABI::Windows::Foundation::IAsyncInfo _AsyncOperationType; -#if _MSC_VER >= 1800 - _Task_impl(Concurrency::details::_CancellationTokenState * _Ct, Concurrency::scheduler_ptr _Scheduler_arg) - : _Task_impl_base(_Ct, _Scheduler_arg) -#else - _Task_impl(Concurrency::details::_CancellationTokenState * _Ct) : _Task_impl_base(_Ct) -#endif - { - _M_unwrapped_async_op = nullptr; - } - virtual ~_Task_impl() - { - // We must invoke _DeregisterCancellation in the derived class destructor. Calling it in the base class destructor could cause - // a partially initialized _Task_impl to be in the list of registrations for a cancellation token. - _DeregisterCancellation(); - } - virtual bool _CancelAndRunContinuations(bool _SynchronousCancel, bool _UserException, bool _PropagatedFromAncestor, const std::shared_ptr<_ExceptionHolder> & _ExceptionHolder) - { - enum { _Nothing, _RunContinuations, _Cancel } _Do = _Nothing; - { - scoped_lock _LockHolder(_M_ContinuationsCritSec); - if (_UserException) - { - _CONCRT_ASSERT(_SynchronousCancel && !_IsCompleted()); - // If the state is _Canceled, the exception has to be coming from an ancestor. - _CONCRT_ASSERT(!_IsCanceled() || _PropagatedFromAncestor); -#if _MSC_VER < 1800 - // If the state is _Started or _PendingCancel, the exception cannot be coming from an ancestor. - _CONCRT_ASSERT((!_IsStarted() && !_IsPendingCancel()) || !_PropagatedFromAncestor); -#endif - // We should not be canceled with an exception more than once. - _CONCRT_ASSERT(!_HasUserException()); - - if (_M_TaskState == _Canceled) - { - // If the task has finished cancelling there should not be any continuation records in the array. - return false; - } - else - { - _CONCRT_ASSERT(_M_TaskState != _Completed); - _M_exceptionHolder = _ExceptionHolder; - } - } - else - { - // Completed is a non-cancellable state, and if this is an asynchronous cancel, we're unable to do better than the last async cancel - // which is to say, cancellation is already initiated, so return early. - if (_IsCompleted() || _IsCanceled() || (_IsPendingCancel() && !_SynchronousCancel)) - { - _CONCRT_ASSERT(!_IsCompleted() || !_HasUserException()); - return false; - } - _CONCRT_ASSERT(!_SynchronousCancel || !_HasUserException()); - } - -#if _MSC_VER >= 1800 - if (_SynchronousCancel) -#else - if (_SynchronousCancel || _IsCreated()) -#endif - { - // Be aware that this set must be done BEFORE _M_Scheduled being set, or race will happen between this and wait() - _M_TaskState = _Canceled; -#if _MSC_VER < 1800 - _M_Scheduled.set(); -#endif - - // Cancellation completes the task, so all dependent tasks must be run to cancel them - // They are canceled when they begin running (see _RunContinuation) and see that their - // ancestor has been canceled. - _Do = _RunContinuations; - } - else - { -#if _MSC_VER >= 1800 - _CONCRT_ASSERT(!_UserException); - - if (_IsStarted()) - { - // should not initiate cancellation under a lock - _Do = _Cancel; - } - - // The _M_TaskState variable transitions to _Canceled when cancellation is completed (the task is not executing user code anymore). - // In the case of a synchronous cancel, this can happen immediately, whereas with an asynchronous cancel, the task has to move from - // _Started to _PendingCancel before it can move to _Canceled when it is finished executing. - _M_TaskState = _PendingCancel; - - _M_taskEventLogger._LogCancelTask(); - } - } - - switch (_Do) - { - case _Cancel: - { -#else - _CONCRT_ASSERT(_IsStarted() && !_UserException); -#endif - // The _M_TaskState variable transitions to _Canceled when cancellation is completed (the task is not executing user code anymore). - // In the case of a synchronous cancel, this can happen immediately, whereas with an asynchronous cancel, the task has to move from - // _Started to _PendingCancel before it can move to _Canceled when it is finished executing. - _M_TaskState = _PendingCancel; - if (_M_unwrapped_async_op != nullptr) - { - // We will only try to cancel async operation but not unwrapped tasks, since unwrapped tasks cannot be canceled without its token. - if (_M_unwrapped_async_op) _M_unwrapped_async_op->Cancel(); - } -#if _MSC_VER >= 1800 - _M_TaskCollection._Cancel(); - break; -#else - // Optimistic trying for cancelation - if (_M_pTaskCollection != nullptr) - { - _M_pTaskCollection->_Cancel(); - } -#endif - } -#if _MSC_VER < 1800 - } -#endif - - // Only execute continuations and mark the task as completed if we were able to move the task to the _Canceled state. -#if _MSC_VER >= 1800 - case _RunContinuations: - { - _M_TaskCollection._Complete(); -#else - if (_RunContinuations) - { - _M_Completed.set(); -#endif - - if (_M_Continuations) - { - // Scheduling cancellation with automatic inlining. - details::_ScheduleFuncWithAutoInline([=]() -> HRESULT { _RunTaskContinuations(); return S_OK; }, Concurrency::details::_DefaultAutoInline); - } -#if _MSC_VER >= 1800 - break; - } -#endif - } - return true; - } - void _FinalizeAndRunContinuations(_ReturnType _Result) - { - -#if _MSC_VER >= 1800 - _M_Result.Set(_Result); -#else - _M_Result = _Result; - _M_ResultContext = _ResultContext<_ReturnType>::_GetContext(_M_fRuntimeAggregate); -#endif - { - // - // Hold this lock to ensure continuations being concurrently either get added - // to the _M_Continuations vector or wait for the result - // - scoped_lock _LockHolder(_M_ContinuationsCritSec); - - // A task could still be in the _Created state if it was created with a task_completion_event. - // It could also be in the _Canceled state for the same reason. - _CONCRT_ASSERT(!_HasUserException() && !_IsCompleted()); - if (_IsCanceled()) - { - return; - } - - // Always transition to "completed" state, even in the face of unacknowledged pending cancellation - _M_TaskState = _Completed; - } -#if _MSC_VER >= 1800 - _M_TaskCollection._Complete(); -#else - _M_Completed.set(); -#endif - _RunTaskContinuations(); - } - // - // This method is invoked when the starts executing. The task returns early if this method returns true. - // - bool _TransitionedToStarted() - { - scoped_lock _LockHolder(_M_ContinuationsCritSec); -#if _MSC_VER >= 1800 - // Canceled state could only result from antecedent task's canceled state, but that code path will not reach here. - _ASSERT(!_IsCanceled()); - if (_IsPendingCancel()) -#else - if (_IsCanceled()) -#endif - { - return false; - } - _CONCRT_ASSERT(_IsCreated()); - _M_TaskState = _Started; - return true; - } - void _SetUnwrappedAsyncOp(_AsyncOperationType* _AsyncOp) - { - scoped_lock _LockHolder(_M_ContinuationsCritSec); - // Cancel the async operation if the task itself is canceled, since the thread that canceled the task missed it. - if (_IsPendingCancel()) - { - _CONCRT_ASSERT(!_IsCanceled()); - if (_AsyncOp) _AsyncOp->Cancel(); - } - else - { - _M_unwrapped_async_op = _AsyncOp; - } - } -#if _MSC_VER >= 1800 - // Return true if the task has reached a terminal state - bool _IsDone() - { - return _IsCompleted() || _IsCanceled(); - } -#endif - _ReturnType _GetResult() - { -#if _MSC_VER >= 1800 - return _M_Result.Get(); -#else - return _ResultContext<_ReturnType>::_GetValue(_M_Result, _M_ResultContext, _M_fRuntimeAggregate); -#endif - } -#if _MSC_VER >= 1800 - _ResultHolder<_ReturnType> _M_Result; // this means that the result type must have a public default ctor. -#else - _ReturnType _M_Result; // this means that the result type must have a public default ctor. -#endif - Microsoft::WRL::ComPtr<_AsyncOperationType> _M_unwrapped_async_op; -#if _MSC_VER < 1800 - _ContextCallback _M_ResultContext; -#endif - }; - - template - struct _Task_completion_event_impl - { -#if _MSC_VER >= 1800 - private: - _Task_completion_event_impl(const _Task_completion_event_impl&); - _Task_completion_event_impl& operator=(const _Task_completion_event_impl&); - - public: -#endif - typedef std::vector::_Type> _TaskList; - - _Task_completion_event_impl() : _M_fHasValue(false), _M_fIsCanceled(false) - { - } - - bool _HasUserException() - { - return _M_exceptionHolder != nullptr; - } - - ~_Task_completion_event_impl() - { - for (auto _TaskIt = _M_tasks.begin(); _TaskIt != _M_tasks.end(); ++_TaskIt) - { - _CONCRT_ASSERT(!_M_fHasValue && !_M_fIsCanceled); - // Cancel the tasks since the event was never signaled or canceled. - (*_TaskIt)->_Cancel(true); - } - } - - // We need to protect the loop over the array, so concurrent_vector would not have helped - _TaskList _M_tasks; - critical_section _M_taskListCritSec; -#if _MSC_VER >= 1800 - _ResultHolder<_ResultType> _M_value; -#else - _ResultType _M_value; -#endif - std::shared_ptr<_ExceptionHolder> _M_exceptionHolder; - bool _M_fHasValue; - bool _M_fIsCanceled; - }; - - // Utility method for dealing with void functions - inline std::function _MakeVoidToUnitFunc(const std::function& _Func) - { - return [=](_Unit_type* retVal) -> HRESULT { HRESULT hr = _Func(); *retVal = _Unit_type(); return hr; }; - } - - template - std::function _MakeUnitToTFunc(const std::function& _Func) - { - return [=](_Unit_type, _Type* retVal) -> HRESULT { HRESULT hr = _Func(retVal); return hr; }; - } - - template - std::function _MakeTToUnitFunc(const std::function& _Func) - { - return[=](_Type t, _Unit_type* retVal) -> HRESULT { HRESULT hr = _Func(t); *retVal = _Unit_type(); return hr; }; - } - - inline std::function _MakeUnitToUnitFunc(const std::function& _Func) - { - return [=](_Unit_type, _Unit_type* retVal) -> HRESULT { HRESULT hr = _Func(); *retVal = _Unit_type(); return hr; }; - } -} - - -/// -/// The task_completion_event class allows you to delay the execution of a task until a condition is satisfied, -/// or start a task in response to an external event. -/// -/// -/// The result type of this task_completion_event class. -/// -/// -/// Use a task created from a task completion event when your scenario requires you to create a task that will complete, and -/// thereby have its continuations scheduled for execution, at some point in the future. The task_completion_event must -/// have the same type as the task you create, and calling the set method on the task completion event with a value of that type -/// will cause the associated task to complete, and provide that value as a result to its continuations. -/// If the task completion event is never signaled, any tasks created from it will be canceled when it is destructed. -/// task_completion_event behaves like a smart pointer, and should be passed by value. -/// -/// -/**/ -template -class task_completion_event -{ -public: - /// - /// Constructs a task_completion_event object. - /// - /**/ - task_completion_event() : _M_Impl(std::make_shared>()) - { - } - - /// - /// Sets the task completion event. - /// - /// - /// The result to set this event with. - /// - /// - /// The method returns true if it was successful in setting the event. It returns false if the event is already set. - /// - /// - /// In the presence of multiple or concurrent calls to set, only the first call will succeed and its result (if any) will be stored in the - /// task completion event. The remaining sets are ignored and the method will return false. When you set a task completion event, all the - /// tasks created from that event will immediately complete, and its continuations, if any, will be scheduled. Task completion objects that have - /// a other than void will pass the value to their continuations. - /// - /**/ - bool set(_ResultType _Result) const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - // Subsequent sets are ignored. This makes races to set benign: the first setter wins and all others are ignored. - if (_IsTriggered()) - { - return false; - } - - _TaskList _Tasks; - bool _RunContinuations = false; - { - details::scoped_lock _LockHolder(_M_Impl->_M_taskListCritSec); - - if (!_IsTriggered()) - { -#if _MSC_VER >= 1800 - _M_Impl->_M_value.Set(_Result); -#else - _M_Impl->_M_value = _Result; -#endif - _M_Impl->_M_fHasValue = true; - - _Tasks.swap(_M_Impl->_M_tasks); - _RunContinuations = true; - } - } - - if (_RunContinuations) - { - for (auto _TaskIt = _Tasks.begin(); _TaskIt != _Tasks.end(); ++_TaskIt) - { -#if _MSC_VER >= 1800 - // If current task was cancelled by a cancellation_token, it would be in cancel pending state. - if ((*_TaskIt)->_IsPendingCancel()) - (*_TaskIt)->_Cancel(true); - else - { - // Tasks created with task_completion_events can be marked as async, (we do this in when_any and when_all - // if one of the tasks involved is an async task). Since continuations of async tasks can execute inline, we - // need to run continuations after the lock is released. - (*_TaskIt)->_FinalizeAndRunContinuations(_M_Impl->_M_value.Get()); - } -#else - // Tasks created with task_completion_events can be marked as async, (we do this in when_any and when_all - // if one of the tasks involved is an async task). Since continuations of async tasks can execute inline, we - // need to run continuations after the lock is released. - (*_TaskIt)->_FinalizeAndRunContinuations(_M_Impl->_M_value); -#endif - } - if (_M_Impl->_HasUserException()) - { - _M_Impl->_M_exceptionHolder.reset(); - } - return true; - } - - return false; - } -#if _MSC_VER >= 1800 - - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - bool set_exception(_E _Except) const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - // It is important that _CAPTURE_CALLSTACK() evaluate to the instruction after the call instruction for set_exception. - return _Cancel(std::make_exception_ptr(_Except), _CAPTURE_CALLSTACK()); - } -#endif - - /// - /// Propagates an exception to all tasks associated with this event. - /// - /// - /// The exception_ptr that indicates the exception to set this event with. - /// - /**/ - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - bool set_exception(std::exception_ptr _ExceptionPtr) const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - // It is important that _ReturnAddress() evaluate to the instruction after the call instruction for set_exception. -#if _MSC_VER >= 1800 - return _Cancel(_ExceptionPtr, _CAPTURE_CALLSTACK()); -#else - return _Cancel(_ExceptionPtr, _ReturnAddress()); -#endif - } - - /// - /// Internal method to cancel the task_completion_event. Any task created using this event will be marked as canceled if it has - /// not already been set. - /// - bool _Cancel() const - { - // Cancel with the stored exception if one exists. - return _CancelInternal(); - } - - /// - /// Internal method to cancel the task_completion_event with the exception provided. Any task created using this event will be canceled - /// with the same exception. - /// - template -#if _MSC_VER >= 1800 - bool _Cancel(_ExHolderType _ExHolder, const details::_TaskCreationCallstack &_SetExceptionAddressHint = details::_TaskCreationCallstack()) const -#else - bool _Cancel(_ExHolderType _ExHolder, void* _SetExceptionAddressHint = nullptr) const -#endif - { - (void)_SetExceptionAddressHint; - bool _Canceled; -#if _MSC_VER >= 1800 - if(_StoreException(_ExHolder, _SetExceptionAddressHint)) -#else - if (_StoreException(_ExHolder)) -#endif - { - _Canceled = _CancelInternal(); - _CONCRT_ASSERT(_Canceled); - } - else - { - _Canceled = false; - } - return _Canceled; - } - - /// - /// Internal method that stores an exception in the task completion event. This is used internally by when_any. - /// Note, this does not cancel the task completion event. A task completion event with a stored exception - /// can bet set() successfully. If it is canceled, it will cancel with the stored exception, if one is present. - /// - template -#if _MSC_VER >= 1800 - bool _StoreException(_ExHolderType _ExHolder, const details::_TaskCreationCallstack &_SetExceptionAddressHint = details::_TaskCreationCallstack()) const -#else - bool _StoreException(_ExHolderType _ExHolder, void* _SetExceptionAddressHint = nullptr) const -#endif - { - details::scoped_lock _LockHolder(_M_Impl->_M_taskListCritSec); - if (!_IsTriggered() && !_M_Impl->_HasUserException()) - { - // Create the exception holder only if we have ensured there we will be successful in setting it onto the - // task completion event. Failing to do so will result in an unobserved task exception. - _M_Impl->_M_exceptionHolder = _ToExceptionHolder(_ExHolder, _SetExceptionAddressHint); - return true; - } - return false; - } - - /// - /// Tests whether current event has been either Set, or Canceled. - /// - bool _IsTriggered() const - { - return _M_Impl->_M_fHasValue || _M_Impl->_M_fIsCanceled; - } - -private: - -#if _MSC_VER >= 1800 - static std::shared_ptr _ToExceptionHolder(const std::shared_ptr& _ExHolder, const details::_TaskCreationCallstack&) -#else - static std::shared_ptr _ToExceptionHolder(const std::shared_ptr& _ExHolder, void*) -#endif - { - return _ExHolder; - } - -#if _MSC_VER >= 1800 - static std::shared_ptr _ToExceptionHolder(std::exception_ptr _ExceptionPtr, const details::_TaskCreationCallstack &_SetExceptionAddressHint) -#else - static std::shared_ptr _ToExceptionHolder(std::exception_ptr _ExceptionPtr, void* _SetExceptionAddressHint) -#endif - { - return std::make_shared(_ExceptionPtr, _SetExceptionAddressHint); - } - - template friend class task; // task can register itself with the event by calling the private _RegisterTask - template friend class task_completion_event; - - typedef typename details::_Task_completion_event_impl<_ResultType>::_TaskList _TaskList; - - /// - /// Cancels the task_completion_event. - /// - bool _CancelInternal() const - { - // Cancellation of task completion events is an internal only utility. Our usage is such that _CancelInternal - // will never be invoked if the task completion event has been set. - _CONCRT_ASSERT(!_M_Impl->_M_fHasValue); - if (_M_Impl->_M_fIsCanceled) - { - return false; - } - - _TaskList _Tasks; - bool _Cancel = false; - { - details::scoped_lock _LockHolder(_M_Impl->_M_taskListCritSec); - _CONCRT_ASSERT(!_M_Impl->_M_fHasValue); - if (!_M_Impl->_M_fIsCanceled) - { - _M_Impl->_M_fIsCanceled = true; - _Tasks.swap(_M_Impl->_M_tasks); - _Cancel = true; - } - } - - bool _UserException = _M_Impl->_HasUserException(); - - if (_Cancel) - { - for (auto _TaskIt = _Tasks.begin(); _TaskIt != _Tasks.end(); ++_TaskIt) - { - // Need to call this after the lock is released. See comments in set(). - if (_UserException) - { - (*_TaskIt)->_CancelWithExceptionHolder(_M_Impl->_M_exceptionHolder, true); - } - else - { - (*_TaskIt)->_Cancel(true); - } - } - } - return _Cancel; - } - - /// - /// Register a task with this event. This function is called when a task is constructed using - /// a task_completion_event. - /// - void _RegisterTask(const typename details::_Task_ptr<_ResultType>::_Type & _TaskParam) - { - details::scoped_lock _LockHolder(_M_Impl->_M_taskListCritSec); -#if _MSC_VER < 1800 - _TaskParam->_SetScheduledEvent(); -#endif - //If an exception was already set on this event, then cancel the task with the stored exception. - if (_M_Impl->_HasUserException()) - { - _TaskParam->_CancelWithExceptionHolder(_M_Impl->_M_exceptionHolder, true); - } - else if (_M_Impl->_M_fHasValue) - { -#if _MSC_VER >= 1800 - _TaskParam->_FinalizeAndRunContinuations(_M_Impl->_M_value.Get()); -#else - _TaskParam->_FinalizeAndRunContinuations(_M_Impl->_M_value); -#endif - } - else - { - _M_Impl->_M_tasks.push_back(_TaskParam); - } - } - - std::shared_ptr> _M_Impl; -}; - -/// -/// The task_completion_event class allows you to delay the execution of a task until a condition is satisfied, -/// or start a task in response to an external event. -/// -/// -/// Use a task created from a task completion event when your scenario requires you to create a task that will complete, and -/// thereby have its continuations scheduled for execution, at some point in the future. The task_completion_event must -/// have the same type as the task you create, and calling the set method on the task completion event with a value of that type -/// will cause the associated task to complete, and provide that value as a result to its continuations. -/// If the task completion event is never signaled, any tasks created from it will be canceled when it is destructed. -/// task_completion_event behaves like a smart pointer, and should be passed by value. -/// -/// -/**/ -template<> -class task_completion_event -{ -public: - /// - /// Sets the task completion event. - /// - /// - /// The method returns true if it was successful in setting the event. It returns false if the event is already set. - /// - /// - /// In the presence of multiple or concurrent calls to set, only the first call will succeed and its result (if any) will be stored in the - /// task completion event. The remaining sets are ignored and the method will return false. When you set a task completion event, all the - /// tasks created from that event will immediately complete, and its continuations, if any, will be scheduled. Task completion objects that have - /// a other than void will pass the value to their continuations. - /// - /**/ - bool set() const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - return _M_unitEvent.set(details::_Unit_type()); - } -#if _MSC_VER >= 1800 - - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - bool set_exception(_E _Except) const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - return _M_unitEvent._Cancel(std::make_exception_ptr(_Except), _CAPTURE_CALLSTACK()); - } -#endif - - /// - /// Propagates an exception to all tasks associated with this event. - /// - /// - /// The exception_ptr that indicates the exception to set this event with. - /// - /**/ - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - bool set_exception(std::exception_ptr _ExceptionPtr) const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - // It is important that _ReturnAddress() evaluate to the instruction after the call instruction for set_exception. -#if _MSC_VER >= 1800 - return _M_unitEvent._Cancel(_ExceptionPtr, _CAPTURE_CALLSTACK()); -#else - return _M_unitEvent._Cancel(_ExceptionPtr, _ReturnAddress()); -#endif - } - - /// - /// Cancel the task_completion_event. Any task created using this event will be marked as canceled if it has - /// not already been set. - /// - void _Cancel() const // 'const' (even though it's not deep) allows to safely pass events by value into lambdas - { - _M_unitEvent._Cancel(); - } - - /// - /// Cancel the task_completion_event with the exception holder provided. Any task created using this event will be canceled - /// with the same exception. - /// - void _Cancel(const std::shared_ptr& _ExHolder) const - { - _M_unitEvent._Cancel(_ExHolder); - } - - /// - /// Method that stores an exception in the task completion event. This is used internally by when_any. - /// Note, this does not cancel the task completion event. A task completion event with a stored exception - /// can bet set() successfully. If it is canceled, it will cancel with the stored exception, if one is present. - /// - bool _StoreException(const std::shared_ptr& _ExHolder) const - { - return _M_unitEvent._StoreException(_ExHolder); - } - - /// - /// Test whether current event has been either Set, or Canceled. - /// - bool _IsTriggered() const - { - return _M_unitEvent._IsTriggered(); - } - -private: - template friend class task; // task can register itself with the event by calling the private _RegisterTask - - /// - /// Register a task with this event. This function is called when a task is constructed using - /// a task_completion_event. - /// - void _RegisterTask(details::_Task_ptr::_Type _TaskParam) - { - _M_unitEvent._RegisterTask(_TaskParam); - } - - // The void event contains an event a dummy type so common code can be used for events with void and non-void results. - task_completion_event _M_unitEvent; -}; -namespace details -{ - // - // Compile-time validation helpers - // - - // Task constructor validation: issue helpful diagnostics for common user errors. Do not attempt full validation here. - // - // Anything callable is fine - template - auto _IsValidTaskCtor(_Ty _Param, int, int, int, int, int, int, int) -> typename decltype(_Param(), std::true_type()); - - // Anything callable with a task return value is fine - template - auto _IsValidTaskCtor(_Ty _Param, int, int, int, int, int, int, ...) -> typename decltype(_Param(stdx::declval*>()), std::true_type()); - - // Anything callable with a return value is fine - template - auto _IsValidTaskCtor(_Ty _Param, int, int, int, int, int, ...) -> typename decltype(_Param(stdx::declval<_ReturnType*>()), std::true_type()); - - // Anything that has GetResults is fine: this covers AsyncAction* - template - auto _IsValidTaskCtor(_Ty _Param, int, int, int, int, ...) -> typename decltype(_Param->GetResults(), std::true_type()); - - // Anything that has GetResults(TResult_abi*) is fine: this covers AsyncOperation* - template - auto _IsValidTaskCtor(_Ty _Param, int, int, int, ...) -> typename decltype(_Param->GetResults(stdx::declval()))*>()), std::true_type()); - - // Allow parameters with set: this covers task_completion_event - template - auto _IsValidTaskCtor(_Ty _Param, int, int, ...) -> typename decltype(_Param.set(stdx::declval<_ReturnType>()), std::true_type()); - - template - auto _IsValidTaskCtor(_Ty _Param, int, ...) -> typename decltype(_Param.set(), std::true_type()); - - // All else is invalid - template - std::false_type _IsValidTaskCtor(_Ty _Param, ...); - - template - void _ValidateTaskConstructorArgs(_Ty _Param) - { - (void)_Param; - static_assert(std::is_same(_Param, 0, 0, 0, 0, 0, 0, 0)), std::true_type>::value, - "incorrect argument for task constructor; can be a callable object, an asynchronous operation, or a task_completion_event" - ); - static_assert(!(std::is_same<_Ty, _ReturnType>::value && details::_IsIAsyncInfo<_Ty>::_Value), - "incorrect template argument for task; consider using the return type of the async operation"); - } - // Helpers for create_async validation - // - // A parameter lambda taking no arguments is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, int, int, int, int, int) -> typename decltype(_Param(), std::true_type()); - - // A parameter lambda taking a result argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, int, int, int, int, ...) -> typename decltype(_Param(stdx::declval<_ReturnType*>()), std::true_type()); - - // A parameter lambda taking an cancellation_token argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, int, int, int, ...) -> typename decltype(_Param(Concurrency::cancellation_token::none()), std::true_type()); - - // A parameter lambda taking an cancellation_token argument and a result argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, int, int, ...) -> typename decltype(_Param(Concurrency::cancellation_token::none(), stdx::declval<_ReturnType*>()), std::true_type()); - - // A parameter lambda taking a progress report argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, int, ...) -> typename decltype(_Param(details::_ProgressReporterCtorArgType()), std::true_type()); - - // A parameter lambda taking a progress report argument and a result argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, int, ...) -> typename decltype(_Param(details::_ProgressReporterCtorArgType(), stdx::declval<_ReturnType*>()), std::true_type()); - - // A parameter lambda taking a progress report and a cancellation_token argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, int, ...) -> typename decltype(_Param(details::_ProgressReporterCtorArgType(), Concurrency::cancellation_token::none()), std::true_type()); - - // A parameter lambda taking a progress report and a cancellation_token argument and a result argument is valid - template - static auto _IsValidCreateAsync(_Ty _Param, int, ...) -> typename decltype(_Param(details::_ProgressReporterCtorArgType(), Concurrency::cancellation_token::none(), stdx::declval<_ReturnType*>()), std::true_type()); - - // All else is invalid - template - static std::false_type _IsValidCreateAsync(_Ty _Param, ...); -} - -/// -/// The Parallel Patterns Library (PPL) task class. A task object represents work that can be executed asynchronously, -/// and concurrently with other tasks and parallel work produced by parallel algorithms in the Concurrency Runtime. It produces -/// a result of type on successful completion. Tasks of type task<void> produce no result. -/// A task can be waited upon and canceled independently of other tasks. It can also be composed with other tasks using -/// continuations(then), and join(when_all) and choice(when_any) patterns. -/// -/// -/// The result type of this task. -/// -/// -/// For more information, see . -/// -/**/ -template -class task -{ -public: - /// - /// The type of the result an object of this class produces. - /// - /**/ - typedef _ReturnType result_type; - - /// - /// Constructs a task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task() : _M_Impl(nullptr) - { - // The default constructor should create a task with a nullptr impl. This is a signal that the - // task is not usable and should throw if any wait(), get() or then() APIs are used. - } - - /// - /// Constructs a task object. - /// - /// - /// The type of the parameter from which the task is to be constructed. - /// - /// - /// The parameter from which the task is to be constructed. This could be a lambda, a function object, a task_completion_event<result_type> - /// object, or a Windows::Foundation::IAsyncInfo if you are using tasks in your Windows Store app. The lambda or function - /// object should be a type equivalent to std::function<X(void)>, where X can be a variable of type result_type, - /// task<result_type>, or a Windows::Foundation::IAsyncInfo in Windows Store apps. - /// - /// - /// The cancellation token to associate with this task. A task created without a cancellation token cannot be canceled. It implicitly receives - /// the token cancellation_token::none(). - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - explicit task(_Ty _Param) - { -#if _MSC_VER >= 1800 - task_options _TaskOptions; -#endif - details::_ValidateTaskConstructorArgs<_ReturnType, _Ty>(_Param); - -#if _MSC_VER >= 1800 - _CreateImpl(_TaskOptions.get_cancellation_token()._GetImplValue(), _TaskOptions.get_scheduler()); -#else - _CreateImpl(Concurrency::cancellation_token::none()._GetImplValue()); -#endif - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of the task constructor. -#if _MSC_VER >= 1800 - _SetTaskCreationCallstack(_CAPTURE_CALLSTACK()); -#else - _SetTaskCreationAddressHint(_ReturnAddress()); -#endif - _TaskInitMaybeFunctor(_Param, details::_IsCallable<_ReturnType>(_Param, 0, 0, 0)); - } - - /// - /// Constructs a task object. - /// - /// - /// The type of the parameter from which the task is to be constructed. - /// - /// - /// The parameter from which the task is to be constructed. This could be a lambda, a function object, a task_completion_event<result_type> - /// object, or a Windows::Foundation::IAsyncInfo if you are using tasks in your Windows Store app. The lambda or function - /// object should be a type equivalent to std::function<X(void)>, where X can be a variable of type result_type, - /// task<result_type>, or a Windows::Foundation::IAsyncInfo in Windows Store apps. - /// - /// - /// The cancellation token to associate with this task. A task created without a cancellation token cannot be canceled. It implicitly receives - /// the token cancellation_token::none(). - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -#if _MSC_VER >= 1800 - explicit task(_Ty _Param, const task_options &_TaskOptions) -#else - explicit task(_Ty _Param, Concurrency::cancellation_token _Token) -#endif - { - details::_ValidateTaskConstructorArgs<_ReturnType, _Ty>(_Param); - -#if _MSC_VER >= 1800 - _CreateImpl(_TaskOptions.get_cancellation_token()._GetImplValue(), _TaskOptions.get_scheduler()); -#else - _CreateImpl(_Token._GetImplValue()); -#endif - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of the task constructor. -#if _MSC_VER >= 1800 - _SetTaskCreationCallstack(details::_get_internal_task_options(_TaskOptions)._M_hasPresetCreationCallstack ? details::_get_internal_task_options(_TaskOptions)._M_presetCreationCallstack : _CAPTURE_CALLSTACK()); -#else - _SetTaskCreationAddressHint(_ReturnAddress()); -#endif - _TaskInitMaybeFunctor(_Param, details::_IsCallable<_ReturnType>(_Param, 0, 0, 0)); - } - - /// - /// Constructs a task object. - /// - /// - /// The source task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task(const task& _Other) : _M_Impl(_Other._M_Impl) {} - - /// - /// Constructs a task object. - /// - /// - /// The source task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task(task&& _Other) : _M_Impl(std::move(_Other._M_Impl)) {} - - /// - /// Replaces the contents of one task object with another. - /// - /// - /// The source task object. - /// - /// - /// As task behaves like a smart pointer, after a copy assignment, this task objects represents the same - /// actual task as does. - /// - /**/ - task& operator=(const task& _Other) - { - if (this != &_Other) - { - _M_Impl = _Other._M_Impl; - } - return *this; - } - - /// - /// Replaces the contents of one task object with another. - /// - /// - /// The source task object. - /// - /// - /// As task behaves like a smart pointer, after a copy assignment, this task objects represents the same - /// actual task as does. - /// - /**/ - task& operator=(task&& _Other) - { - if (this != &_Other) - { - _M_Impl = std::move(_Other._M_Impl); - } - return *this; - } - - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - auto then(const _Function& _Func) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType - { -#if _MSC_VER >= 1800 - task_options _TaskOptions; - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - return _ThenImpl<_ReturnType, _Function>(_Func, _TaskOptions); -#else - auto _ContinuationTask = _ThenImpl<_ReturnType, _Function>(_Func, nullptr, task_continuation_context::use_default()); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; -#endif - } - - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The cancellation token to associate with the continuation task. A continuation task that is created without a cancellation token will inherit - /// the token of its antecedent task. - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -#if _MSC_VER >= 1800 - auto then(const _Function& _Func, task_options _TaskOptions) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType -#else - auto then(const _Function& _Func, Concurrency::cancellation_token _CancellationToken) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType -#endif - { -#if _MSC_VER >= 1800 - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - return _ThenImpl<_ReturnType, _Function>(_Func, _TaskOptions); -#else - auto _ContinuationTask = _ThenImpl<_ReturnType, _Function>(_Func, _CancellationToken._GetImplValue(), task_continuation_context::use_default()); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; -#endif - } -#if _MSC_VER < 1800 - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// A variable that specifies where the continuation should execute. This variable is only useful when used in a - /// Windows Store app. For more information, see task_continuation_context - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - auto then(const _Function& _Func, task_continuation_context _ContinuationContext) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType - { - auto _ContinuationTask = _ThenImpl<_ReturnType, _Function>(_Func, nullptr, _ContinuationContext); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; - } -#endif - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The cancellation token to associate with the continuation task. A continuation task that is created without a cancellation token will inherit - /// the token of its antecedent task. - /// - /// - /// A variable that specifies where the continuation should execute. This variable is only useful when used in a - /// Windows Store app. For more information, see task_continuation_context - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - auto then(const _Function& _Func, Concurrency::cancellation_token _CancellationToken, task_continuation_context _ContinuationContext) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType - { -#if _MSC_VER >= 1800 - task_options _TaskOptions(_CancellationToken, _ContinuationContext); - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - return _ThenImpl<_ReturnType, _Function>(_Func, _TaskOptions); -#else - auto _ContinuationTask = _ThenImpl<_ReturnType, _Function>(_Func, _CancellationToken._GetImplValue(), _ContinuationContext); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; -#endif - } - - /// - /// Waits for this task to reach a terminal state. It is possible for wait to execute the task inline, if all of the tasks - /// dependencies are satisfied, and it has not already been picked up for execution by a background worker. - /// - /// - /// A task_status value which could be either completed or canceled. If the task encountered an exception - /// during execution, or an exception was propagated to it from an antecedent task, wait will throw that exception. - /// - /**/ - task_status wait() const - { - if (_M_Impl == nullptr) - { - throw Concurrency::invalid_operation("wait() cannot be called on a default constructed task."); - } - - return _M_Impl->_Wait(); - } - - /// - /// Returns the result this task produced. If the task is not in a terminal state, a call to get will wait for the task to - /// finish. This method does not return a value when called on a task with a result_type of void. - /// - /// - /// The result of the task. - /// - /// - /// If the task is canceled, a call to get will throw a task_canceled exception. If the task - /// encountered an different exception or an exception was propagated to it from an antecedent task, a call to get will throw that exception. - /// - /**/ - _ReturnType get() const - { - if (_M_Impl == nullptr) - { - throw Concurrency::invalid_operation("get() cannot be called on a default constructed task."); - } - - if (_M_Impl->_Wait() == Concurrency::canceled) - { - throw Concurrency::task_canceled(); - } - - return _M_Impl->_GetResult(); - } -#if _MSC_VER >= 1800 - /// - /// Determines if the task is completed. - /// - /// - /// True if the task has completed, false otherwise. - /// - /// - /// The function returns true if the task is completed or canceled (with or without user exception). - /// - bool is_done() const - { - if (!_M_Impl) - { - throw Concurrency::invalid_operation("is_done() cannot be called on a default constructed task."); - } - - return _M_Impl->_IsDone(); - } - - /// - /// Returns the scheduler for this task - /// - /// - /// A pointer to the scheduler - /// - Concurrency::scheduler_ptr scheduler() const - { - if (!_M_Impl) - { - throw Concurrency::invalid_operation("scheduler() cannot be called on a default constructed task."); - } - - return _M_Impl->_GetScheduler(); - } -#endif - /// - /// Determines whether the task unwraps a Windows Runtime IAsyncInfo interface or is descended from such a task. - /// - /// - /// true if the task unwraps an IAsyncInfo interface or is descended from such a task, false otherwise. - /// - /**/ - bool is_apartment_aware() const - { - if (_M_Impl == nullptr) - { - throw Concurrency::invalid_operation("is_apartment_aware() cannot be called on a default constructed task."); - } - return _M_Impl->_IsApartmentAware(); - } - - /// - /// Determines whether two task objects represent the same internal task. - /// - /// - /// true if the objects refer to the same underlying task, and false otherwise. - /// - /**/ - bool operator==(const task<_ReturnType>& _Rhs) const - { - return (_M_Impl == _Rhs._M_Impl); - } - - /// - /// Determines whether two task objects represent different internal tasks. - /// - /// - /// true if the objects refer to different underlying tasks, and false otherwise. - /// - /**/ - bool operator!=(const task<_ReturnType>& _Rhs) const - { - return !operator==(_Rhs); - } - - /// - /// Create an underlying task implementation. - /// -#if _MSC_VER >= 1800 - void _CreateImpl(Concurrency::details::_CancellationTokenState * _Ct, Concurrency::scheduler_ptr _Scheduler) -#else - void _CreateImpl(Concurrency::details::_CancellationTokenState * _Ct) -#endif - { - _CONCRT_ASSERT(_Ct != nullptr); -#if _MSC_VER >= 1800 - _M_Impl = details::_Task_ptr<_ReturnType>::_Make(_Ct, _Scheduler); -#else - _M_Impl = details::_Task_ptr<_ReturnType>::_Make(_Ct); -#endif - if (_Ct != Concurrency::details::_CancellationTokenState::_None()) - { -#if _MSC_VER >= 1800 - _M_Impl->_RegisterCancellation(_M_Impl); -#else - _M_Impl->_RegisterCancellation(); -#endif - } - } - - /// - /// Return the underlying implementation for this task. - /// - const typename details::_Task_ptr<_ReturnType>::_Type & _GetImpl() const - { - return _M_Impl; - } - - /// - /// Set the implementation of the task to be the supplied implementaion. - /// - void _SetImpl(const typename details::_Task_ptr<_ReturnType>::_Type & _Impl) - { - _CONCRT_ASSERT(_M_Impl == nullptr); - _M_Impl = _Impl; - } - - /// - /// Set the implementation of the task to be the supplied implementaion using a move instead of a copy. - /// - void _SetImpl(typename details::_Task_ptr<_ReturnType>::_Type && _Impl) - { - _CONCRT_ASSERT(_M_Impl == nullptr); - _M_Impl = std::move(_Impl); - } - - /// - /// Sets a property determining whether the task is apartment aware. - /// - void _SetAsync(bool _Async = true) - { - _GetImpl()->_SetAsync(_Async); - } - - /// - /// Sets a field in the task impl to the return address for calls to the task constructors and the then method. - /// -#if _MSC_VER >= 1800 - void _SetTaskCreationCallstack(const details::_TaskCreationCallstack &_callstack) - { - _GetImpl()->_SetTaskCreationCallstack(_callstack); - } -#else - void _SetTaskCreationAddressHint(void* _Address) - { - _GetImpl()->_SetTaskCreationAddressHint(_Address); - } -#endif - /// - /// An internal version of then that takes additional flags and always execute the continuation inline by default. - /// When _ForceInline is set to false, continuations inlining will be limited to default _DefaultAutoInline. - /// This function is Used for runtime internal continuations only. - /// - template -#if _MSC_VER >= 1800 - auto _Then(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, - details::_TaskInliningMode _InliningMode = Concurrency::details::_ForceInline) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType - { - // inherit from antecedent - auto _Scheduler = _GetImpl()->_GetScheduler(); - - return _ThenImpl<_ReturnType, _Function>(_Func, _PTokenState, task_continuation_context::use_default(), _Scheduler, _CAPTURE_CALLSTACK(), _InliningMode); - } -#else - auto _Then(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, bool _Aggregating, - details::_TaskInliningMode _InliningMode = Concurrency::details::_ForceInline) const -> typename details::_ContinuationTypeTraits<_Function, _ReturnType>::_TaskOfType - { - return _ThenImpl<_ReturnType, _Function>(_Func, _PTokenState, task_continuation_context::use_default(), _Aggregating, _InliningMode); - } -#endif - -private: - template friend class task; - - // A helper class template that transforms an intial task lambda returns void into a lambda that returns a non-void type (details::_Unit_type is used - // to substitute for void). This is to minimize the special handling required for 'void'. - template - class _Init_func_transformer - { - public: - static auto _Perform(std::function _Func) -> decltype(_Func) - { - return _Func; - } - }; - - template<> - class _Init_func_transformer - { - public: - static auto _Perform(std::function _Func) -> decltype(details::_MakeVoidToUnitFunc(_Func)) - { - return details::_MakeVoidToUnitFunc(_Func); - } - }; - - // The task handle type used to construct an 'initial task' - a task with no dependents. - template - struct _InitialTaskHandle : - details::_PPLTaskHandle<_ReturnType, _InitialTaskHandle<_InternalReturnType, _Function, _TypeSelection>, details::_UnrealizedChore> - { - _Function _M_function; - _InitialTaskHandle(const typename details::_Task_ptr<_ReturnType>::_Type & _TaskImpl, const _Function & _Function) : _M_function(_Function), _PPLTaskHandle(_TaskImpl) - { - } - virtual ~_InitialTaskHandle() {} - -#if _MSC_VER >= 1800 - template - auto _LogWorkItemAndInvokeUserLambda(_Func && _func, _RetArg && _retArg) const -> decltype(_func(std::forward<_RetArg>(_retArg))) - { - details::_TaskWorkItemRAIILogger _LogWorkItem(this->_M_pTask->_M_taskEventLogger); - return _func(std::forward<_RetArg>(_retArg)); - } -#endif - - void _Perform() const - { - _Init(_TypeSelection()); - } -#if _MSC_VER >= 1800 - - void _SyncCancelAndPropagateException() const - { - this->_M_pTask->_Cancel(true); - } -#endif - // - // Overload 0: returns _InternalReturnType - // - // This is the most basic task with no unwrapping - // - void _Init(details::_TypeSelectorNoAsync) const - { - _ReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Init_func_transformer<_InternalReturnType>::_Perform(_M_function), &retVal); -#else - HRESULT hr = _Init_func_transformer<_InternalReturnType>::_Perform(_M_function)(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - _M_pTask->_FinalizeAndRunContinuations(retVal); - } - - // - // Overload 1: returns IAsyncOperation<_InternalReturnType>* - // or - // returns task<_InternalReturnType> - // - // This is task whose functor returns an async operation or a task which will be unwrapped for continuation - // Depending on the output type, the right _AsyncInit gets invoked - // - void _Init(details::_TypeSelectorAsyncTask) const - { - task<_InternalReturnType> retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, &retVal); -#else - HRESULT hr = _M_function(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_ReturnType, _InternalReturnType>(_M_pTask, retVal); - } - void _Init(details::_TypeSelectorAsyncOperation) const - { - _ReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, &retVal); -#else - HRESULT hr = _M_function(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_ReturnType, _InternalReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal).Get()); - } - - // - // Overload 2: returns IAsyncAction* - // - // This is task whose functor returns an async action which will be unwrapped for continuation - // - void _Init(details::_TypeSelectorAsyncAction) const - { - _ReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, &retVal); -#else - HRESULT hr = _M_function(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_ReturnType, _InternalReturnType>(_M_pTask, Microsoft::WRL::Make(retVal).Get()); - } - - // - // Overload 3: returns IAsyncOperationWithProgress<_InternalReturnType, _ProgressType>* - // - // This is task whose functor returns an async operation with progress which will be unwrapped for continuation - // - void _Init(details::_TypeSelectorAsyncOperationWithProgress) const - { - typedef details::_GetProgressType::_Value _ProgressType; - _ReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, &retVal); -#else - HRESULT hr = _M_function(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_ReturnType, _InternalReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal).Get()); - } - - // - // Overload 4: returns IAsyncActionWithProgress<_ProgressType>* - // - // This is task whose functor returns an async action with progress which will be unwrapped for continuation - // - void _Init(details::_TypeSelectorAsyncActionWithProgress) const - { - typedef details::_GetProgressType::_Value _ProgressType; - _ReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, &retVal); -#else - HRESULT hr = _M_function(&retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_ReturnType, _InternalReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal).Get()); - } - }; - - /// - /// A helper class template that transforms a continuation lambda that either takes or returns void, or both, into a lambda that takes and returns a - /// non-void type (details::_Unit_type is used to substitute for void). This is to minimize the special handling required for 'void'. - /// - template - class _Continuation_func_transformer - { - public: - static auto _Perform(std::function _Func) -> decltype(_Func) - { - return _Func; - } - }; - - template - class _Continuation_func_transformer - { - public: - static auto _Perform(std::function _Func) -> decltype(details::_MakeUnitToTFunc<_OutType>(_Func)) - { - return details::_MakeUnitToTFunc<_OutType>(_Func); - } - }; - - template - class _Continuation_func_transformer<_InType, void> - { - public: - static auto _Perform(std::function _Func) -> decltype(details::_MakeTToUnitFunc<_InType>(_Func)) - { - return details::_MakeTToUnitFunc<_InType>(_Func); - } - }; - - template<> - class _Continuation_func_transformer - { - public: - static auto _Perform(std::function _Func) -> decltype(details::_MakeUnitToUnitFunc(_Func)) - { - return details::_MakeUnitToUnitFunc(_Func); - } - }; - /// - /// The task handle type used to create a 'continuation task'. - /// - template - struct _ContinuationTaskHandle : - details::_PPLTaskHandle::_Type, - _ContinuationTaskHandle<_InternalReturnType, _ContinuationReturnType, _Function, _IsTaskBased, _TypeSelection>, details::_ContinuationTaskHandleBase> - { - typedef typename details::_NormalizeVoidToUnitType<_ContinuationReturnType>::_Type _NormalizedContinuationReturnType; - - typename details::_Task_ptr<_ReturnType>::_Type _M_ancestorTaskImpl; - _Function _M_function; - - _ContinuationTaskHandle(const typename details::_Task_ptr<_ReturnType>::_Type & _AncestorImpl, - const typename details::_Task_ptr<_NormalizedContinuationReturnType>::_Type & _ContinuationImpl, - const _Function & _Func, const task_continuation_context & _Context, details::_TaskInliningMode _InliningMode) : -#if _MSC_VER >= 1800 - details::_PPLTaskHandle::_Type, - _ContinuationTaskHandle<_InternalReturnType, _ContinuationReturnType, _Function, _IsTaskBased, _TypeSelection>, details::_ContinuationTaskHandleBase> - ::_PPLTaskHandle(_ContinuationImpl) - , _M_ancestorTaskImpl(_AncestorImpl) - , _M_function(_Func) -#else - _M_ancestorTaskImpl(_AncestorImpl), _PPLTaskHandle(_ContinuationImpl), _M_function(_Func) -#endif - { - _M_isTaskBasedContinuation = _IsTaskBased::value; - _M_continuationContext = _Context; - _M_continuationContext._Resolve(_AncestorImpl->_IsApartmentAware()); - _M_inliningMode = _InliningMode; - } - - virtual ~_ContinuationTaskHandle() {} - -#if _MSC_VER >= 1800 - template - auto _LogWorkItemAndInvokeUserLambda(_Func && _func, _Arg && _value, _RetArg && _retArg) const -> decltype(_func(std::forward<_Arg>(_value), std::forward<_RetArg>(_retArg))) - { - details::_TaskWorkItemRAIILogger _LogWorkItem(this->_M_pTask->_M_taskEventLogger); - return _func(std::forward<_Arg>(_value), std::forward<_RetArg>(_retArg)); - } -#endif - - void _Perform() const - { - _Continue(_IsTaskBased(), _TypeSelection()); - } - -#if _MSC_VER >= 1800 - void _SyncCancelAndPropagateException() const - { - if (_M_ancestorTaskImpl->_HasUserException()) - { - // If the ancestor encountered an exception, transfer the exception to the continuation - // This traverses down the tree to propagate the exception. - this->_M_pTask->_CancelWithExceptionHolder(_M_ancestorTaskImpl->_GetExceptionHolder(), true); - } - else - { - // If the ancestor was canceled, then your own execution should be canceled. - // This traverses down the tree to cancel it. - this->_M_pTask->_Cancel(true); - } - } -#endif - - // - // Overload 0-0: _InternalReturnType -> _TaskType - // - // This is a straight task continuation which simply invokes its target with the ancestor's completion argument - // - void _Continue(std::false_type, details::_TypeSelectorNoAsync) const - { - _NormalizedContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _ContinuationReturnType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &retVal); -#else - HRESULT hr =_Continuation_func_transformer<_InternalReturnType, _ContinuationReturnType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - _M_pTask->_FinalizeAndRunContinuations(retVal); - } - - // - // Overload 0-1: _InternalReturnType -> IAsyncOperation<_TaskType>* - // or - // _InternalReturnType -> task<_TaskType> - // - // This is a straight task continuation which returns an async operation or a task which will be unwrapped for continuation - // Depending on the output type, the right _AsyncInit gets invoked - // - void _Continue(std::false_type, details::_TypeSelectorAsyncTask) const - { - typedef typename details::_FunctionTypeTraits<_Function, _InternalReturnType>::_FuncRetType _FuncOutputType; - _FuncOutputType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &retVal); -#else - HRESULT hr = _Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>( - _M_pTask, - retVal - ); - } - void _Continue(std::false_type, details::_TypeSelectorAsyncOperation) const - { - typedef typename details::_FunctionTypeTraits<_Function, _InternalReturnType>::_FuncRetType _FuncOutputType; - _FuncOutputType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &retVal); -#else - HRESULT hr = _Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>( - _M_pTask, - Microsoft::WRL::Make>(retVal).Get()); - } - - // - // Overload 0-2: _InternalReturnType -> IAsyncAction* - // - // This is a straight task continuation which returns an async action which will be unwrapped for continuation - // - void _Continue(std::false_type, details::_TypeSelectorAsyncAction) const - { - typedef details::_FunctionTypeTraits<_Function, _InternalReturnType>::_FuncRetType _FuncOutputType; - _FuncOutputType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &retVal); -#else - HRESULT hr = _Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>( - _M_pTask, - Microsoft::WRL::Make( - retVal).Get()); - } - - // - // Overload 0-3: _InternalReturnType -> IAsyncOperationWithProgress<_TaskType, _ProgressType>* - // - // This is a straight task continuation which returns an async operation with progress which will be unwrapped for continuation - // - void _Continue(std::false_type, details::_TypeSelectorAsyncOperationWithProgress) const - { - typedef details::_FunctionTypeTraits<_Function, _InternalReturnType>::_FuncRetType _FuncOutputType; - - _FuncOutputType _OpWithProgress; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &_OpWithProgress); -#else - HRESULT hr = _Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &_OpWithProgress); -#endif - typedef details::_GetProgressType::_Value _ProgressType; - - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>( - _M_pTask, - Microsoft::WRL::Make>(_OpWithProgress).Get()); - } - - // - // Overload 0-4: _InternalReturnType -> IAsyncActionWithProgress<_ProgressType>* - // - // This is a straight task continuation which returns an async action with progress which will be unwrapped for continuation - // - void _Continue(std::false_type, details::_TypeSelectorAsyncActionWithProgress) const - { - typedef details::_FunctionTypeTraits<_Function, _InternalReturnType>::_FuncRetType _FuncOutputType; - - _FuncOutputType _OpWithProgress; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function), _M_ancestorTaskImpl->_GetResult(), &_OpWithProgress); -#else - HRESULT hr = _Continuation_func_transformer<_InternalReturnType, _FuncOutputType>::_Perform(_M_function)(_M_ancestorTaskImpl->_GetResult(), &_OpWithProgress); -#endif - typedef details::_GetProgressType::_Value _ProgressType; - - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>( - _M_pTask, - Microsoft::WRL::Make>(_OpWithProgress).Get()); - } - - - // - // Overload 1-0: task<_InternalReturnType> -> _TaskType - // - // This is an exception handling type of continuation which takes the task rather than the task's result. - // - void _Continue(std::true_type, details::_TypeSelectorNoAsync) const - { - typedef task<_InternalReturnType> _FuncInputType; - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - _NormalizedContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_Continuation_func_transformer<_FuncInputType, _ContinuationReturnType>::_Perform(_M_function), std::move(_ResultTask), &retVal); -#else - HRESULT hr = _Continuation_func_transformer<_FuncInputType, _ContinuationReturnType>::_Perform(_M_function)(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - _M_pTask->_FinalizeAndRunContinuations(retVal); - } - - // - // Overload 1-1: task<_InternalReturnType> -> IAsyncOperation<_TaskType>^ - // or - // task<_TaskType> - // - // This is an exception handling type of continuation which takes the task rather than - // the task's result. It also returns an async operation or a task which will be unwrapped - // for continuation - // - void _Continue(std::true_type, details::_TypeSelectorAsyncTask) const - { - // The continuation takes a parameter of type task<_Input>, which is the same as the ancestor task. - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - _ContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, std::move(_ResultTask), &retVal); -#else - HRESULT hr = _M_function(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>(_M_pTask, retVal); - } - void _Continue(std::true_type, details::_TypeSelectorAsyncOperation) const - { - // The continuation takes a parameter of type task<_Input>, which is the same as the ancestor task. - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - _ContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, std::move(_ResultTask), &retVal); -#else - HRESULT hr = _M_function(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal)); - } - - // - // Overload 1-2: task<_InternalReturnType> -> IAsyncAction* - // - // This is an exception handling type of continuation which takes the task rather than - // the task's result. It also returns an async action which will be unwrapped for continuation - // - void _Continue(std::true_type, details::_TypeSelectorAsyncAction) const - { - // The continuation takes a parameter of type task<_Input>, which is the same as the ancestor task. - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - _ContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, std::move(_ResultTask), &retVal); -#else - HRESULT hr = _M_function(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>(_M_pTask, - Microsoft::WRL::Make(retVal)); - } - - // - // Overload 1-3: task<_InternalReturnType> -> IAsyncOperationWithProgress<_TaskType, _ProgressType>* - // - // This is an exception handling type of continuation which takes the task rather than - // the task's result. It also returns an async operation with progress which will be unwrapped - // for continuation - // - void _Continue(std::true_type, details::_TypeSelectorAsyncOperationWithProgress) const - { - // The continuation takes a parameter of type task<_Input>, which is the same as the ancestor task. - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - - typedef details::_GetProgressType::_Value _ProgressType; - _ContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, std::move(_ResultTask), &retVal); -#else - HRESULT hr = _M_function(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal)); - } - - // - // Overload 1-4: task<_InternalReturnType> -> IAsyncActionWithProgress<_ProgressType>* - // - // This is an exception handling type of continuation which takes the task rather than - // the task's result. It also returns an async operation with progress which will be unwrapped - // for continuation - // - void _Continue(std::true_type, details::_TypeSelectorAsyncActionWithProgress) const - { - // The continuation takes a parameter of type task<_Input>, which is the same as the ancestor task. - task<_InternalReturnType> _ResultTask; - _ResultTask._SetImpl(std::move(_M_ancestorTaskImpl)); - - typedef details::_GetProgressType::_Value _ProgressType; - _ContinuationReturnType retVal; -#if _MSC_VER >= 1800 - HRESULT hr = _LogWorkItemAndInvokeUserLambda(_M_function, std::move(_ResultTask), &retVal); -#else - HRESULT hr = _M_function(std::move(_ResultTask), &retVal); -#endif - if (FAILED(hr)) throw std::make_exception_ptr(hr); - details::_Task_impl_base::_AsyncInit<_NormalizedContinuationReturnType, _ContinuationReturnType>(_M_pTask, - Microsoft::WRL::Make>(retVal)); - } - }; - /// - /// Initializes a task using a lambda, function pointer or function object. - /// - template - void _TaskInitWithFunctor(const _Function& _Func) - { - typedef details::_InitFunctorTypeTraits<_InternalReturnType, details::_FunctionTypeTraits<_Function, void>::_FuncRetType> _Async_type_traits; - - _M_Impl->_M_fFromAsync = _Async_type_traits::_IsAsyncTask; - _M_Impl->_M_fUnwrappedTask = _Async_type_traits::_IsUnwrappedTaskOrAsync; -#if _MSC_VER >= 1800 - _M_Impl->_M_taskEventLogger._LogScheduleTask(false); -#endif - _M_Impl->_ScheduleTask(new _InitialTaskHandle<_InternalReturnType, _Function, typename _Async_type_traits::_AsyncKind>(_GetImpl(), _Func), Concurrency::details::_NoInline); - } - - /// - /// Initializes a task using a task completion event. - /// - void _TaskInitNoFunctor(task_completion_event<_ReturnType>& _Event) - { - _Event._RegisterTask(_M_Impl); - } - - /// - /// Initializes a task using an asynchronous operation IAsyncOperation* - /// - template - void _TaskInitAsyncOp(details::_AsyncInfoImpl<_OpType, _CompHandlerType, _ResultType>* _AsyncOp) - { - _M_Impl->_M_fFromAsync = true; -#if _MSC_VER < 1800 - _M_Impl->_SetScheduledEvent(); -#endif - // Mark this task as started here since we can set the state in the constructor without acquiring a lock. Once _AsyncInit - // returns a completion could execute concurrently and the task must be fully initialized before that happens. - _M_Impl->_M_TaskState = details::_Task_impl_base::_Started; - // Pass the shared pointer into _AsyncInit for storage in the Async Callback. - details::_Task_impl_base::_AsyncInit<_ReturnType, _Result>(_M_Impl, _AsyncOp); - } - - /// - /// Initializes a task using an asynchronous operation IAsyncOperation* - /// - template - void _TaskInitNoFunctor(ABI::Windows::Foundation::IAsyncOperation<_Result>* _AsyncOp) - { - _TaskInitAsyncOp<_Result>(Microsoft::WRL::Make>(_AsyncOp).Get()); - } - - /// - /// Initializes a task using an asynchronous operation with progress IAsyncOperationWithProgress* - /// - template - void _TaskInitNoFunctor(ABI::Windows::Foundation::IAsyncOperationWithProgress<_Result, _Progress>* _AsyncOp) - { - _TaskInitAsyncOp<_Result>(Microsoft::WRL::Make>(_AsyncOp).Get()); - } - /// - /// Initializes a task using a callable object. - /// - template - void _TaskInitMaybeFunctor(_Function & _Func, std::true_type) - { - _TaskInitWithFunctor<_ReturnType, _Function>(_Func); - } - - /// - /// Initializes a task using a non-callable object. - /// - template - void _TaskInitMaybeFunctor(_Ty & _Param, std::false_type) - { - _TaskInitNoFunctor(_Param); - } -#if _MSC_VER >= 1800 - template - auto _ThenImpl(const _Function& _Func, const task_options& _TaskOptions) const -> typename details::_ContinuationTypeTraits<_Function, _InternalReturnType>::_TaskOfType - { - if (!_M_Impl) - { - throw Concurrency::invalid_operation("then() cannot be called on a default constructed task."); - } - - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; - auto _Scheduler = _TaskOptions.has_scheduler() ? _TaskOptions.get_scheduler() : _GetImpl()->_GetScheduler(); - auto _CreationStack = details::_get_internal_task_options(_TaskOptions)._M_hasPresetCreationCallstack ? details::_get_internal_task_options(_TaskOptions)._M_presetCreationCallstack : details::_TaskCreationCallstack(); - return _ThenImpl<_InternalReturnType, _Function>(_Func, _PTokenState, _TaskOptions.get_continuation_context(), _Scheduler, _CreationStack); - } -#endif - /// - /// The one and only implementation of then for void and non-void tasks. - /// - template -#if _MSC_VER >= 1800 - auto _ThenImpl(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, const task_continuation_context& _ContinuationContext, Concurrency::scheduler_ptr _Scheduler, details::_TaskCreationCallstack _CreationStack, - details::_TaskInliningMode _InliningMode = Concurrency::details::_NoInline) const -> typename details::_ContinuationTypeTraits<_Function, _InternalReturnType>::_TaskOfType -#else - auto _ThenImpl(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, const task_continuation_context& _ContinuationContext, - bool _Aggregating = false, details::_TaskInliningMode _InliningMode = Concurrency::details::_NoInline) const -> typename details::_ContinuationTypeTraits<_Function, _InternalReturnType>::_TaskOfType -#endif - { - if (_M_Impl == nullptr) - { - throw Concurrency::invalid_operation("then() cannot be called on a default constructed task."); - } - - typedef details::_FunctionTypeTraits<_Function, _InternalReturnType> _Function_type_traits; - typedef details::_TaskTypeTraits _Async_type_traits; - typedef typename _Async_type_traits::_TaskRetType _TaskType; - - // - // A **nullptr** token state indicates that it was not provided by the user. In this case, we inherit the antecedent's token UNLESS this is a - // an exception handling continuation. In that case, we break the chain with a _None. That continuation is never canceled unless the user - // explicitly passes the same token. - // - if (_PTokenState == nullptr) - { -#if _MSC_VER >= 1800 - if (_Function_type_traits::_Takes_task::value) -#else - if (_Function_type_traits::_Takes_task()) -#endif - { - _PTokenState = Concurrency::details::_CancellationTokenState::_None(); - } - else - { - _PTokenState = _GetImpl()->_M_pTokenState; - } - } - - task<_TaskType> _ContinuationTask; -#if _MSC_VER >= 1800 - _ContinuationTask._CreateImpl(_PTokenState, _Scheduler); -#else - _ContinuationTask._CreateImpl(_PTokenState); -#endif - _ContinuationTask._GetImpl()->_M_fFromAsync = (_GetImpl()->_M_fFromAsync || _Async_type_traits::_IsAsyncTask); -#if _MSC_VER < 1800 - _ContinuationTask._GetImpl()->_M_fRuntimeAggregate = _Aggregating; -#endif - _ContinuationTask._GetImpl()->_M_fUnwrappedTask = _Async_type_traits::_IsUnwrappedTaskOrAsync; -#if _MSC_VER >= 1800 - _ContinuationTask._SetTaskCreationCallstack(_CreationStack); -#endif - _GetImpl()->_ScheduleContinuation(new _ContinuationTaskHandle<_InternalReturnType, _TaskType, _Function, typename _Function_type_traits::_Takes_task, typename _Async_type_traits::_AsyncKind>( - _GetImpl(), _ContinuationTask._GetImpl(), _Func, _ContinuationContext, _InliningMode)); - - return _ContinuationTask; - } - - // The underlying implementation for this task - typename details::_Task_ptr<_ReturnType>::_Type _M_Impl; -}; - -/// -/// The Parallel Patterns Library (PPL) task class. A task object represents work that can be executed asynchronously, -/// and concurrently with other tasks and parallel work produced by parallel algorithms in the Concurrency Runtime. It produces -/// a result of type on successful completion. Tasks of type task<void> produce no result. -/// A task can be waited upon and canceled independently of other tasks. It can also be composed with other tasks using -/// continuations(then), and join(when_all) and choice(when_any) patterns. -/// -/// -/// For more information, see . -/// -/**/ -template<> -class task -{ -public: - /// - /// The type of the result an object of this class produces. - /// - /**/ - typedef void result_type; - - /// - /// Constructs a task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task() : _M_unitTask() - { - // The default constructor should create a task with a nullptr impl. This is a signal that the - // task is not usable and should throw if any wait(), get() or then() APIs are used. - } -#if _MSC_VER < 1800 - /// - /// Constructs a task object. - /// - /// - /// The type of the parameter from which the task is to be constructed. - /// - /// - /// The parameter from which the task is to be constructed. This could be a lambda, a function object, a task_completion_event<result_type> - /// object, or a Windows::Foundation::IAsyncInfo if you are using tasks in your Windows Store app. The lambda or function - /// object should be a type equivalent to std::function<X(void)>, where X can be a variable of type result_type, - /// task<result_type>, or a Windows::Foundation::IAsyncInfo in Windows Store apps. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - explicit task(_Ty _Param) - { - details::_ValidateTaskConstructorArgs(_Param); - - _M_unitTask._CreateImpl(Concurrency::cancellation_token::none()._GetImplValue()); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of the task constructor. - _M_unitTask._SetTaskCreationAddressHint(_ReturnAddress()); - - _TaskInitMaybeFunctor(_Param, details::_IsCallable(_Param, 0, 0, 0)); - } -#endif - /// - /// Constructs a task object. - /// - /// - /// The type of the parameter from which the task is to be constructed. - /// - /// - /// The parameter from which the task is to be constructed. This could be a lambda, a function object, a task_completion_event<result_type> - /// object, or a Windows::Foundation::IAsyncInfo if you are using tasks in your Windows Store app. The lambda or function - /// object should be a type equivalent to std::function<X(void)>, where X can be a variable of type result_type, - /// task<result_type>, or a Windows::Foundation::IAsyncInfo in Windows Store apps. - /// - /// - /// The cancellation token to associate with this task. A task created without a cancellation token cannot be canceled. It implicitly receives - /// the token cancellation_token::none(). - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -#if _MSC_VER >= 1800 - explicit task(_Ty _Param, const task_options& _TaskOptions = task_options()) -#else - explicit task(_Ty _Param, Concurrency::cancellation_token _CancellationToken) -#endif - { - details::_ValidateTaskConstructorArgs(_Param); -#if _MSC_VER >= 1800 - _M_unitTask._CreateImpl(_TaskOptions.get_cancellation_token()._GetImplValue(), _TaskOptions.get_scheduler()); -#else - _M_unitTask._CreateImpl(_CancellationToken._GetImplValue()); -#endif - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of the task constructor. -#if _MSC_VER >= 1800 - _M_unitTask._SetTaskCreationCallstack(details::_get_internal_task_options(_TaskOptions)._M_hasPresetCreationCallstack ? details::_get_internal_task_options(_TaskOptions)._M_presetCreationCallstack : _CAPTURE_CALLSTACK()); -#else - _M_unitTask._SetTaskCreationAddressHint(_ReturnAddress()); -#endif - _TaskInitMaybeFunctor(_Param, details::_IsCallable(_Param, 0, 0, 0)); - } - - /// - /// Constructs a task object. - /// - /// - /// The source task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task(const task& _Other) : _M_unitTask(_Other._M_unitTask){} - - /// - /// Constructs a task object. - /// - /// - /// The source task object. - /// - /// - /// The default constructor for a task is only present in order to allow tasks to be used within containers. - /// A default constructed task cannot be used until you assign a valid task to it. Methods such as get, wait or then - /// will throw an invalid_argument exception when called on a default constructed task. - /// A task that is created from a task_completion_event will complete (and have its continuations scheduled) when the task - /// completion event is set. - /// The version of the constructor that takes a cancellation token creates a task that can be canceled using the - /// cancellation_token_source the token was obtained from. Tasks created without a cancellation token are not cancelable. - /// Tasks created from a Windows::Foundation::IAsyncInfo interface or a lambda that returns an IAsyncInfo interface - /// reach their terminal state when the enclosed Windows Runtime asynchronous operation or action completes. Similarly, tasks created - /// from a lamda that returns a task<result_type> reach their terminal state when the inner task reaches its terminal state, - /// and not when the lamda returns. - /// task behaves like a smart pointer and is safe to pass around by value. It can be accessed by multiple threads - /// without the need for locks. - /// The constructor overloads that take a Windows::Foundation::IAsyncInfo interface or a lambda returning such an interface, are only available - /// to Windows Store apps. - /// For more information, see . - /// - /**/ - task(task&& _Other) : _M_unitTask(std::move(_Other._M_unitTask)) {} - - /// - /// Replaces the contents of one task object with another. - /// - /// - /// The source task object. - /// - /// - /// As task behaves like a smart pointer, after a copy assignment, this task objects represents the same - /// actual task as does. - /// - /**/ - task& operator=(const task& _Other) - { - if (this != &_Other) - { - _M_unitTask = _Other._M_unitTask; - } - return *this; - } - - /// - /// Replaces the contents of one task object with another. - /// - /// - /// The source task object. - /// - /// - /// As task behaves like a smart pointer, after a copy assignment, this task objects represents the same - /// actual task as does. - /// - /**/ - task& operator=(task&& _Other) - { - if (this != &_Other) - { - _M_unitTask = std::move(_Other._M_unitTask); - } - return *this; - } -#if _MSC_VER < 1800 - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - auto then(const _Function& _Func) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - auto _ContinuationTask = _M_unitTask._ThenImpl(_Func, nullptr, task_continuation_context::use_default()); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; - } -#endif - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The cancellation token to associate with the continuation task. A continuation task that is created without a cancellation token will inherit - /// the token of its antecedent task. - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -#if _MSC_VER >= 1800 - auto then(const _Function& _Func, task_options _TaskOptions = task_options()) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - return _M_unitTask._ThenImpl(_Func, _TaskOptions); - } -#else - auto then(const _Function& _Func, Concurrency::cancellation_token _CancellationToken) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - auto _ContinuationTask = _M_unitTask._ThenImpl(_Func, _CancellationToken._GetImplValue(), task_continuation_context::use_default()); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; - } - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// A variable that specifies where the continuation should execute. This variable is only useful when used in a - /// Windows Store app. For more information, see task_continuation_context - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result - auto then(const _Function& _Func, task_continuation_context _ContinuationContext) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - auto _ContinuationTask = _M_unitTask._ThenImpl(_Func, nullptr, _ContinuationContext); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; - - } -#endif - /// - /// Adds a continuation task to this task. - /// - /// - /// The type of the function object that will be invoked by this task. - /// - /// - /// The continuation function to execute when this task completes. This continuation function must take as input - /// a variable of either result_type or task<result_type>, where result_type is the type - /// of the result this task produces. - /// - /// - /// The cancellation token to associate with the continuation task. A continuation task that is created without a cancellation token will inherit - /// the token of its antecedent task. - /// - /// - /// A variable that specifies where the continuation should execute. This variable is only useful when used in a - /// Windows Store app. For more information, see task_continuation_context - /// - /// - /// The newly created continuation task. The result type of the returned task is determined by what returns. - /// - /// - /// The overloads of then that take a lambda or functor that returns a Windows::Foundation::IAsyncInfo interface, are only available - /// to Windows Store apps. - /// For more information on how to use task continuations to compose asynchronous work, see . - /// - /**/ - template - __declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -#if _MSC_VER >= 1800 - auto then(const _Function& _Func, Concurrency::cancellation_token _CancellationToken, task_continuation_context _ContinuationContext) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - task_options _TaskOptions(_CancellationToken, _ContinuationContext); - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - return _M_unitTask._ThenImpl(_Func, _TaskOptions); - } -#else - auto then(const _Function& _Func, Concurrency::cancellation_token _CancellationToken, task_continuation_context _ContinuationContext) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - auto _ContinuationTask = _M_unitTask._ThenImpl(_Func, _CancellationToken._GetImplValue(), _ContinuationContext); - // Do not move the next line out of this function. It is important that _ReturnAddress() evaluate to the the call site of then. - _ContinuationTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _ContinuationTask; - } -#endif - - /// - /// Waits for this task to reach a terminal state. It is possible for wait to execute the task inline, if all of the tasks - /// dependencies are satisfied, and it has not already been picked up for execution by a background worker. - /// - /// - /// A task_status value which could be either completed or canceled. If the task encountered an exception - /// during execution, or an exception was propagated to it from an antecedent task, wait will throw that exception. - /// - /**/ - task_status wait() const - { - return _M_unitTask.wait(); - } - - /// - /// Returns the result this task produced. If the task is not in a terminal state, a call to get will wait for the task to - /// finish. This method does not return a value when called on a task with a result_type of void. - /// - /// - /// If the task is canceled, a call to get will throw a task_canceled exception. If the task - /// encountered an different exception or an exception was propagated to it from an antecedent task, a call to get will throw that exception. - /// - /**/ - void get() const - { - _M_unitTask.get(); - } -#if _MSC_VER >= 1800 - - /// - /// Determines if the task is completed. - /// - /// - /// True if the task has completed, false otherwise. - /// - /// - /// The function returns true if the task is completed or canceled (with or without user exception). - /// - bool is_done() const - { - return _M_unitTask.is_done(); - } - - /// - /// Returns the scheduler for this task - /// - /// - /// A pointer to the scheduler - /// - Concurrency::scheduler_ptr scheduler() const - { - return _M_unitTask.scheduler(); - } -#endif - /// - /// Determines whether the task unwraps a Windows Runtime IAsyncInfo interface or is descended from such a task. - /// - /// - /// true if the task unwraps an IAsyncInfo interface or is descended from such a task, false otherwise. - /// - /**/ - bool is_apartment_aware() const - { - return _M_unitTask.is_apartment_aware(); - } - - /// - /// Determines whether two task objects represent the same internal task. - /// - /// - /// true if the objects refer to the same underlying task, and false otherwise. - /// - /**/ - bool operator==(const task& _Rhs) const - { - return (_M_unitTask == _Rhs._M_unitTask); - } - - /// - /// Determines whether two task objects represent different internal tasks. - /// - /// - /// true if the objects refer to different underlying tasks, and false otherwise. - /// - /**/ - bool operator!=(const task& _Rhs) const - { - return !operator==(_Rhs); - } - - /// - /// Create an underlying task implementation. - /// -#if _MSC_VER >= 1800 - void _CreateImpl(Concurrency::details::_CancellationTokenState * _Ct, Concurrency::scheduler_ptr _Scheduler) - { - _M_unitTask._CreateImpl(_Ct, _Scheduler); - } -#else - void _CreateImpl(Concurrency::details::_CancellationTokenState * _Ct) - { - _M_unitTask._CreateImpl(_Ct); - } -#endif - - /// - /// Return the underlying implementation for this task. - /// - const details::_Task_ptr::_Type & _GetImpl() const - { - return _M_unitTask._M_Impl; - } - - /// - /// Set the implementation of the task to be the supplied implementaion. - /// - void _SetImpl(const details::_Task_ptr::_Type & _Impl) - { - _M_unitTask._SetImpl(_Impl); - } - - /// - /// Set the implementation of the task to be the supplied implementaion using a move instead of a copy. - /// - void _SetImpl(details::_Task_ptr::_Type && _Impl) - { - _M_unitTask._SetImpl(std::move(_Impl)); - } - - /// - /// Sets a property determining whether the task is apartment aware. - /// - void _SetAsync(bool _Async = true) - { - _M_unitTask._SetAsync(_Async); - } - - /// - /// Sets a field in the task impl to the return address for calls to the task constructors and the then method. - /// -#if _MSC_VER >= 1800 - void _SetTaskCreationCallstack(const details::_TaskCreationCallstack &_callstack) - { - _M_unitTask._SetTaskCreationCallstack(_callstack); - } -#else - void _SetTaskCreationAddressHint(void* _Address) - { - _M_unitTask._SetTaskCreationAddressHint(_Address); - } -#endif - - /// - /// An internal version of then that takes additional flags and executes the continuation inline. Used for runtime internal continuations only. - /// - template -#if _MSC_VER >= 1800 - auto _Then(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, - details::_TaskInliningMode _InliningMode = Concurrency::details::_ForceInline) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - // inherit from antecedent - auto _Scheduler = _GetImpl()->_GetScheduler(); - - return _M_unitTask._ThenImpl(_Func, _PTokenState, task_continuation_context::use_default(), _Scheduler, _CAPTURE_CALLSTACK(), _InliningMode); - } -#else - auto _Then(const _Function& _Func, Concurrency::details::_CancellationTokenState *_PTokenState, - bool _Aggregating, details::_TaskInliningMode _InliningMode = Concurrency::details::_ForceInline) const -> typename details::_ContinuationTypeTraits<_Function, void>::_TaskOfType - { - return _M_unitTask._ThenImpl(_Func, _PTokenState, task_continuation_context::use_default(), _Aggregating, _InliningMode); - } -#endif - -private: - template friend class task; - template friend class task_completion_event; - - /// - /// Initializes a task using a task completion event. - /// - void _TaskInitNoFunctor(task_completion_event& _Event) - { - _M_unitTask._TaskInitNoFunctor(_Event._M_unitEvent); - } - /// - /// Initializes a task using an asynchronous action IAsyncAction* - /// - void _TaskInitNoFunctor(ABI::Windows::Foundation::IAsyncAction* _AsyncAction) - { - _M_unitTask._TaskInitAsyncOp(Microsoft::WRL::Make(_AsyncAction).Get()); - } - - /// - /// Initializes a task using an asynchronous action with progress IAsyncActionWithProgress<_P>* - /// - template - void _TaskInitNoFunctor(ABI::Windows::Foundation::IAsyncActionWithProgress<_P>* _AsyncActionWithProgress) - { - _M_unitTask._TaskInitAsyncOp(Microsoft::WRL::Make>(_AsyncActionWithProgress).Get()); - } - /// - /// Initializes a task using a callable object. - /// - template - void _TaskInitMaybeFunctor(_Function & _Func, std::true_type) - { - _M_unitTask._TaskInitWithFunctor(_Func); - } - - /// - /// Initializes a task using a non-callable object. - /// - template - void _TaskInitMaybeFunctor(_T & _Param, std::false_type) - { - _TaskInitNoFunctor(_Param); - } - - // The void task contains a task of a dummy type so common code can be used for tasks with void and non-void results. - task _M_unitTask; -}; - -namespace details -{ - - /// - /// The following type traits are used for the create_task function. - /// - - // Unwrap task - template - _Ty _GetUnwrappedType(task<_Ty>); - - // Unwrap all supported types - template - auto _GetUnwrappedReturnType(_Ty _Arg, int) -> decltype(_GetUnwrappedType(_Arg)); - // fallback - template - _Ty _GetUnwrappedReturnType(_Ty, ...); - - /// - /// _GetTaskType functions will retrieve task type T in task[T](Arg), - /// for given constructor argument Arg and its property "callable". - /// It will automatically unwrap argument to get the final return type if necessary. - /// - - // Non-Callable - template - _Ty _GetTaskType(task_completion_event<_Ty>, std::false_type); - - // Non-Callable - template - auto _GetTaskType(_Ty _NonFunc, std::false_type) -> decltype(_GetUnwrappedType(_NonFunc)); - - // Callable - template - auto _GetTaskType(_Ty _Func, std::true_type) -> decltype(_GetUnwrappedReturnType(stdx::declval<_FunctionTypeTraits<_Ty, void>::_FuncRetType>(), 0)); - - // Special callable returns void - void _GetTaskType(std::function, std::true_type); - struct _BadArgType{}; - - template - auto _FilterValidTaskType(_Ty _Param, int) -> decltype(_GetTaskType(_Param, _IsCallable<_ReturnType>(_Param, 0, 0, 0))); - - template - _BadArgType _FilterValidTaskType(_Ty _Param, ...); - - template - struct _TaskTypeFromParam - { - typedef decltype(_FilterValidTaskType<_ReturnType>(stdx::declval<_Ty>(), 0)) _Type; - }; -} - - -/// -/// Creates a PPL task object. create_task can be used anywhere you would have used a task constructor. -/// It is provided mainly for convenience, because it allows use of the auto keyword while creating tasks. -/// -/// -/// The type of the parameter from which the task is to be constructed. -/// -/// -/// The parameter from which the task is to be constructed. This could be a lambda or function object, a task_completion_event -/// object, a different task object, or a Windows::Foundation::IAsyncInfo interface if you are using tasks in your Windows Store app. -/// -/// -/// A new task of type T, that is inferred from . -/// -/// -/// The first overload behaves like a task constructor that takes a single parameter. -/// The second overload associates the cancellation token provided with the newly created task. If you use this overload you are not -/// allowed to pass in a different task object as the first parameter. -/// The type of the returned task is inferred from the first parameter to the function. If is a task_completion_event<T>, -/// a task<T>, or a functor that returns either type T or task<T>, the type of the created task is task<T>. -/// In a Windows Store app, if is of type Windows::Foundation::IAsyncOperation<T>^ or -/// Windows::Foundation::IAsyncOperationWithProgress<T,P>^, or a functor that returns either of those types, the created task will be of type task<T>. -/// If is of type Windows::Foundation::IAsyncAction^ or Windows::Foundation::IAsyncActionWithProgress<P>^, or a functor -/// that returns either of those types, the created task will have type task<void>. -/// -/// -/// -/**/ -template -__declspec(noinline) -#if _MSC_VER >= 1800 -auto create_task(_Ty _Param, task_options _TaskOptions = task_options()) -> task::_Type> -#else -auto create_task(_Ty _Param) -> task::_Type> -#endif -{ - static_assert(!std::is_same::_Type, details::_BadArgType>::value, - "incorrect argument for create_task; can be a callable object, an asynchronous operation, or a task_completion_event" - ); -#if _MSC_VER >= 1800 - details::_get_internal_task_options(_TaskOptions)._set_creation_callstack(_CAPTURE_CALLSTACK()); - task::_Type> _CreatedTask(_Param, _TaskOptions); -#else - task::_Type> _CreatedTask(_Param); - // Ideally we would like to forceinline create_task, but __forceinline does nothing on debug builds. Therefore, we ask for no inlining - // and overwrite the creation address hint set by the task constructor. DO NOT REMOVE this next line from create_task. It is - // essential that _ReturnAddress() evaluate to the instruction right after the call to create_task in client code. - _CreatedTask._SetTaskCreationAddressHint(_ReturnAddress()); -#endif - return _CreatedTask; -} - -/// -/// Creates a PPL task object. create_task can be used anywhere you would have used a task constructor. -/// It is provided mainly for convenience, because it allows use of the auto keyword while creating tasks. -/// -/// -/// The type of the parameter from which the task is to be constructed. -/// -/// -/// The parameter from which the task is to be constructed. This could be a lambda or function object, a task_completion_event -/// object, a different task object, or a Windows::Foundation::IAsyncInfo interface if you are using tasks in your Windows Store app. -/// -/// -/// The cancellation token to associate with the task. When the source for this token is canceled, cancellation will be requested on the task. -/// -/// -/// A new task of type T, that is inferred from . -/// -/// -/// The first overload behaves like a task constructor that takes a single parameter. -/// The second overload associates the cancellation token provided with the newly created task. If you use this overload you are not -/// allowed to pass in a different task object as the first parameter. -/// The type of the returned task is inferred from the first parameter to the function. If is a task_completion_event<T>, -/// a task<T>, or a functor that returns either type T or task<T>, the type of the created task is task<T>. -/// In a Windows Store app, if is of type Windows::Foundation::IAsyncOperation<T>^ or -/// Windows::Foundation::IAsyncOperationWithProgress<T,P>^, or a functor that returns either of those types, the created task will be of type task<T>. -/// If is of type Windows::Foundation::IAsyncAction^ or Windows::Foundation::IAsyncActionWithProgress<P>^, or a functor -/// that returns either of those types, the created task will have type task<void>. -/// -/// -/// -/**/ -#if _MSC_VER >= 1800 -template -__declspec(noinline) -task<_ReturnType> create_task(const task<_ReturnType>& _Task) -{ - task<_ReturnType> _CreatedTask(_Task); - return _CreatedTask; -} -#else -template -__declspec(noinline) -auto create_task(_Ty _Param, Concurrency::cancellation_token _Token) -> task::_Type> -{ - static_assert(!std::is_same::_Type, details::_BadArgType>::value, - "incorrect argument for create_task; can be a callable object, an asynchronous operation, or a task_completion_event" - ); - task::_Type> _CreatedTask(_Param, _Token); - // Ideally we would like to forceinline create_task, but __forceinline does nothing on debug builds. Therefore, we ask for no inlining - // and overwrite the creation address hint set by the task constructor. DO NOT REMOVE this next line from create_task. It is - // essential that _ReturnAddress() evaluate to the instruction right after the call to create_task in client code. - _CreatedTask._SetTaskCreationAddressHint(_ReturnAddress()); - return _CreatedTask; -} -#endif - -namespace details -{ - template - task*>()))>::type> _To_task_helper(ABI::Windows::Foundation::IAsyncOperation<_T>* op) - { - return task<_T>(op); - } - - template - task*>()))>::type> _To_task_helper(ABI::Windows::Foundation::IAsyncOperationWithProgress<_T, _Progress>* op) - { - return task<_T>(op); - } - - inline task _To_task_helper(ABI::Windows::Foundation::IAsyncAction* op) - { - return task(op); - } - - template - task _To_task_helper(ABI::Windows::Foundation::IAsyncActionWithProgress<_Progress>* op) - { - return task(op); - } - - template - class _ProgressDispatcherBase - { - public: - - virtual ~_ProgressDispatcherBase() - { - } - - virtual void _Report(const _ProgressType& _Val) = 0; - }; - - template - class _ProgressDispatcher : public _ProgressDispatcherBase<_ProgressType> - { - public: - - virtual ~_ProgressDispatcher() - { - } - - _ProgressDispatcher(_ClassPtrType _Ptr) : _M_ptr(_Ptr) - { - } - - virtual void _Report(const _ProgressType& _Val) - { - _M_ptr->_FireProgress(_Val); - } - - private: - - _ClassPtrType _M_ptr; - }; -} // namespace details - - -/// -/// The progress reporter class allows reporting progress notifications of a specific type. Each progress_reporter object is bound -/// to a particular asynchronous action or operation. -/// -/// -/// The payload type of each progress notification reported through the progress reporter. -/// -/// -/// This type is only available to Windows Store apps. -/// -/// -/**/ -template -class progress_reporter -{ - typedef std::shared_ptr> _PtrType; - -public: - - /// - /// Sends a progress report to the asynchronous action or operation to which this progress reporter is bound. - /// - /// - /// The payload to report through a progress notification. - /// - /**/ - void report(const _ProgressType& _Val) const - { - _M_dispatcher->_Report(_Val); - } - - template - static progress_reporter _CreateReporter(_ClassPtrType _Ptr) - { - progress_reporter _Reporter; - details::_ProgressDispatcherBase<_ProgressType> *_PDispatcher = new details::_ProgressDispatcher<_ProgressType, _ClassPtrType>(_Ptr); - _Reporter._M_dispatcher = _PtrType(_PDispatcher); - return _Reporter; - } - progress_reporter() {} - -private: - progress_reporter(details::_ProgressReporterCtorArgType); - - _PtrType _M_dispatcher; -}; - -namespace details -{ - // - // maps internal definitions for AsyncStatus and defines states that are not client visible - // - enum _AsyncStatusInternal - { - _AsyncCreated = -1, // externally invisible - // client visible states (must match AsyncStatus exactly) - _AsyncStarted = ABI::Windows::Foundation::AsyncStatus::Started, // 0 - _AsyncCompleted = ABI::Windows::Foundation::AsyncStatus::Completed, // 1 - _AsyncCanceled = ABI::Windows::Foundation::AsyncStatus::Canceled, // 2 - _AsyncError = ABI::Windows::Foundation::AsyncStatus::Error, // 3 - // non-client visible internal states - _AsyncCancelPending, - _AsyncClosed, - _AsyncUndefined - }; - - // - // designates whether the "GetResults" method returns a single result (after complete fires) or multiple results - // (which are progressively consumable between Start state and before Close is called) - // - enum _AsyncResultType - { - SingleResult = 0x0001, - MultipleResults = 0x0002 - }; - - template - struct _ProgressTypeTraits - { - static const bool _TakesProgress = false; - typedef void _ProgressType; - }; - - template - struct _ProgressTypeTraits> - { - static const bool _TakesProgress = true; - typedef typename _T _ProgressType; - }; - - template::value, bool bTakesProgress = _ProgressTypeTraits<_T>::_TakesProgress> - struct _TokenTypeTraits - { - static const bool _TakesToken = false; - typedef typename _T _ReturnType; - }; - - template - struct _TokenTypeTraits<_T, false, true> - { - static const bool _TakesToken = false; - typedef void _ReturnType; - }; - - template - struct _TokenTypeTraits<_T, true, false> - { - static const bool _TakesToken = true; - typedef void _ReturnType; - }; - - template::_ArgumentCount> - struct _CAFunctorOptions - { - static const bool _TakesProgress = false; - static const bool _TakesToken = false; - typedef void _ProgressType; - typedef void _ReturnType; - }; - - template - struct _CAFunctorOptions<_T, 1> - { - private: - - typedef typename _FunctorTypeTraits<_T>::_Argument1Type _Argument1Type; - - public: - - static const bool _TakesProgress = _ProgressTypeTraits<_Argument1Type>::_TakesProgress; - static const bool _TakesToken = _TokenTypeTraits<_Argument1Type>::_TakesToken; - typedef typename _ProgressTypeTraits<_Argument1Type>::_ProgressType _ProgressType; - typedef typename _TokenTypeTraits<_Argument1Type>::_ReturnType _ReturnType; - }; - - template - struct _CAFunctorOptions<_T, 2> - { - private: - - typedef typename _FunctorTypeTraits<_T>::_Argument1Type _Argument1Type; - typedef typename _FunctorTypeTraits<_T>::_Argument2Type _Argument2Type; - - public: - - static const bool _TakesProgress = _ProgressTypeTraits<_Argument1Type>::_TakesProgress; - static const bool _TakesToken = !_TakesProgress ? true : _TokenTypeTraits<_Argument2Type>::_TakesToken; - typedef typename _ProgressTypeTraits<_Argument1Type>::_ProgressType _ProgressType; - typedef typename _TokenTypeTraits<_Argument2Type>::_ReturnType _ReturnType; - }; - - template - struct _CAFunctorOptions<_T, 3> - { - private: - - typedef typename _FunctorTypeTraits<_T>::_Argument1Type _Argument1Type; - - public: - - static const bool _TakesProgress = true; - static const bool _TakesToken = true; - typedef typename _ProgressTypeTraits<_Argument1Type>::_ProgressType _ProgressType; - typedef typename _FunctorTypeTraits<_T>::_Argument3Type _ReturnType; - }; - - class _Zip - { - }; - - // *************************************************************************** - // Async Operation Task Generators - // - - // - // Functor returns an IAsyncInfo - result needs to be wrapped in a task: - // - template - struct _SelectorTaskGenerator - { -#if _MSC_VER >= 1800 - template - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>(_Func(_pRet), _taskOptinos); - } - - template - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>(_Func(_Cts.get_token(), _pRet), _taskOptinos); - } - - template - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>(_Func(_Progress, _pRet), _taskOptinos); - } - - template - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>(_Func(_Progress, _Cts.get_token(), _pRet), _taskOptinos); - } -#else - template - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>(_Func(_pRet), _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>(_Func(_Cts.get_token(), _pRet), _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>(_Func(_Progress, _pRet), _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>(_Func(_Progress, _Cts.get_token(), _pRet), _Cts.get_token()); - } -#endif - }; - - template - struct _SelectorTaskGenerator<_AsyncSelector, void> - { -#if _MSC_VER >= 1800 - template - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task(_Func(), _taskOptinos); - } - - template - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task(_Func(_Cts.get_token()), _taskOptinos); - } - - template - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task(_Func(_Progress), _taskOptinos); - } - - template - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task(_Func(_Progress, _Cts.get_token()), _taskOptinos); - } -#else - template - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts) - { - return task(_Func(), _Cts.get_token()); - } - - template - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts) - { - return task(_Func(_Cts.get_token()), _Cts.get_token()); - } - - template - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) - { - return task(_Func(_Progress), _Cts.get_token()); - } - - template - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) - { - return task(_Func(_Progress, _Cts.get_token()), _Cts.get_token()); - } -#endif - }; - -#if _MSC_VER < 1800 - // For create_async lambdas that return a (non-task) result, we oversubscriber the current task for the duration of the - // lambda. - struct _Task_generator_oversubscriber - { - _Task_generator_oversubscriber() - { - Concurrency::details::_Context::_Oversubscribe(true); - } - - ~_Task_generator_oversubscriber() - { - Concurrency::details::_Context::_Oversubscribe(false); - } - }; -#endif - - // - // Functor returns a result - it needs to be wrapped in a task: - // - template - struct _SelectorTaskGenerator - { -#if _MSC_VER >= 1800 - -#pragma warning(push) -#pragma warning(disable: 4702) - template - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - HRESULT hr = _Func(_pRet); - retVal = _pRet; - return hr; - }, _taskOptinos); - } -#pragma warning(pop) - - template - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - HRESULT hr = _Func(_Cts.get_token(), _pRet); - retVal = _pRet; - return hr; - }, _taskOptinos); - } - - template - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - HRESULT hr = _Func(_Progress, _pRet); - retVal = _pRet; - return hr; - }, _taskOptinos); - } - - template - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - HRESULT hr = _Func(_Progress, _Cts.get_token(), _pRet); - retVal = _pRet; - return hr; - }, _taskOptinos); - } -#else - template - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - HRESULT hr = _Func(_pRet); - retVal = _pRet; - return hr; - }, _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - HRESULT hr = _Func(_Cts.get_token(), _pRet); - retVal = _pRet; - return hr; - }, _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - HRESULT hr = _Func(_Progress, _pRet); - retVal = _pRet; - return hr; - }, _Cts.get_token()); - } - - template - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return task<_ReturnType>([=](_ReturnType* retVal) -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - HRESULT hr = _Func(_Progress, _Cts.get_token(), _pRet); - retVal = _pRet; - return hr; - }, _Cts.get_token()); - } -#endif - }; - - template<> - struct _SelectorTaskGenerator - { -#if _MSC_VER >= 1800 - template - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task([=]() -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - return _Func(); - }, _taskOptinos); - } - - template - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task([=]() -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - return _Func(_Cts.get_token()); - }, _taskOptinos); - } - - template - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task([=]() -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - return _Func(_Progress); - }, _taskOptinos); - } - - template - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - task_options _taskOptinos(_Cts.get_token()); - details::_get_internal_task_options(_taskOptinos)._set_creation_callstack(_callstack); - return task([=]() -> HRESULT { - Concurrency::details::_Task_generator_oversubscriber_t _Oversubscriber; - (_Oversubscriber); - return _Func(_Progress, _Cts.get_token()); - }, _taskOptinos); - } -#else - template - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts) - { - return task([=]() -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - return _Func(); - }, _Cts.get_token()); - } - - template - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts) - { - return task([=]() -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - return _Func(_Cts.get_token()); - }, _Cts.get_token()); - } - - template - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) - { - return task([=]() -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - return _Func(_Progress); - }, _Cts.get_token()); - } - - template - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) - { - return task([=]() -> HRESULT { - _Task_generator_oversubscriber _Oversubscriber; - return _Func(_Progress, _Cts.get_token()); - }, _Cts.get_token()); - } -#endif - }; - - // - // Functor returns a task - the task can directly be returned: - // - template - struct _SelectorTaskGenerator - { - template -#if _MSC_VER >= 1800 - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) -#else - static task<_ReturnType> _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) -#endif - { - task<_ReturnType> _task; - _Func(&_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) -#else - static task<_ReturnType> _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) -#endif - { - task<_ReturnType> _task; - _Func(_Cts.get_token(), &_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) -#else - static task<_ReturnType> _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) -#endif - { - task<_ReturnType> _task; - _Func(_Progress, &_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) -#else - static task<_ReturnType> _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) -#endif - { - task<_ReturnType> _task; - _Func(_Progress, _Cts.get_token(), &_task); - return _task; - } - }; - - template<> - struct _SelectorTaskGenerator - { - template -#if _MSC_VER >= 1800 - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) -#else - static task _GenerateTask_0(const _Function& _Func, Concurrency::cancellation_token_source _Cts) -#endif - { - task _task; - _Func(&_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) -#else - static task _GenerateTask_1C(const _Function& _Func, Concurrency::cancellation_token_source _Cts) -#endif - { - task _task; - _Func(_Cts.get_token(), &_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) -#else - static task _GenerateTask_1P(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) -#endif - { - task _task; - _Func(_Progress, &_task); - return _task; - } - - template -#if _MSC_VER >= 1800 - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) -#else - static task _GenerateTask_2PC(const _Function& _Func, const _ProgressObject& _Progress, Concurrency::cancellation_token_source _Cts) -#endif - { - task _task; - _Func(_Progress, _Cts.get_token(), &_task); - return _task; - } - }; - - template - struct _TaskGenerator - { - }; - - template - struct _TaskGenerator<_Generator, false, false> - { -#if _MSC_VER >= 1800 - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _callstack)) - { - (void)_Ptr; - return _Generator::_GenerateTask_0(_Func, _Cts, _callstack); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet, _callstack)) - { - return _Generator::_GenerateTask_0(_Func, _Cts, _pRet, _callstack); - } -#else - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts)) - { - (void)_Ptr; - return _Generator::_GenerateTask_0(_Func, _Cts); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet)) - { - return _Generator::_GenerateTask_0(_Func, _Cts, _pRet); - } -#endif - }; - - template - struct _TaskGenerator<_Generator, true, false> - { -#if _MSC_VER >= 1800 - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _callstack)) - { - return _Generator::_GenerateTask_1C(_Func, _Cts, _callstack); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet, _callstack)) - { - return _Generator::_GenerateTask_1C(_Func, _Cts, _pRet, _callstack); - } -#else - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts)) - { - return _Generator::_GenerateTask_1C(_Func, _Cts); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet)) - { - return _Generator::_GenerateTask_1C(_Func, _Cts, _pRet); - } -#endif - }; - - template - struct _TaskGenerator<_Generator, false, true> - { -#if _MSC_VER >= 1800 - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _callstack)) - { - return _Generator::_GenerateTask_1P(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _callstack); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet, _callstack)) - { - return _Generator::_GenerateTask_1P(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _pRet, _callstack); - } -#else - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts)) - { - return _Generator::_GenerateTask_1P(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet)) - { - return _Generator::_GenerateTask_1P(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _pRet); - } -#endif - }; - - template - struct _TaskGenerator<_Generator, true, true> - { -#if _MSC_VER >= 1800 - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _callstack)) - { - return _Generator::_GenerateTask_2PC(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _callstack); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet, _callstack)) - { - return _Generator::_GenerateTask_2PC(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _pRet, _callstack); - } -#else - template - static auto _GenerateTaskNoRet(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts)) - { - return _Generator::_GenerateTask_2PC(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts); - } - - template - static auto _GenerateTask(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - -> decltype(_Generator::_GenerateTask_0(_Func, _Cts, _pRet)) - { - return _Generator::_GenerateTask_2PC(_Func, progress_reporter<_ProgressType>::_CreateReporter(_Ptr), _Cts, _pRet); - } -#endif - }; - - // *************************************************************************** - // Async Operation Attributes Classes - // - // These classes are passed through the hierarchy of async base classes in order to hold multiple attributes of a given async construct in - // a single container. An attribute class must define: - // - // Mandatory: - // ------------------------- - // - // _AsyncBaseType : The Windows Runtime interface which is being implemented. - // _CompletionDelegateType : The Windows Runtime completion delegate type for the interface. - // _ProgressDelegateType : If _TakesProgress is true, the Windows Runtime progress delegate type for the interface. If it is false, an empty Windows Runtime type. - // _ReturnType : The return type of the async construct (void for actions / non-void for operations) - // - // _TakesProgress : An indication as to whether or not - // - // _Generate_Task : A function adapting the user's function into what's necessary to produce the appropriate task - // - // Optional: - // ------------------------- - // - - template - struct _AsyncAttributes - { - }; - - template - struct _AsyncAttributes<_Function, _ProgressType, _ReturnType, _TaskTraits, _TakesToken, true> - { - typedef typename ABI::Windows::Foundation::IAsyncOperationWithProgress<_ReturnType, _ProgressType> _AsyncBaseType; - typedef typename ABI::Windows::Foundation::IAsyncOperationProgressHandler<_ReturnType, _ProgressType> _ProgressDelegateType; - typedef typename ABI::Windows::Foundation::IAsyncOperationWithProgressCompletedHandler<_ReturnType, _ProgressType> _CompletionDelegateType; - typedef typename _ReturnType _ReturnType; - typedef typename ABI::Windows::Foundation::Internal::GetAbiType()))>::type _ReturnType_abi; - typedef typename _ProgressType _ProgressType; - typedef typename ABI::Windows::Foundation::Internal::GetAbiType()))>::type _ProgressType_abi; - typedef typename _TaskTraits::_AsyncKind _AsyncKind; - typedef typename _SelectorTaskGenerator<_AsyncKind, _ReturnType> _SelectorTaskGenerator; - typedef typename _TaskGenerator<_SelectorTaskGenerator, _TakesToken, true> _TaskGenerator; - - static const bool _TakesProgress = true; - static const bool _TakesToken = _TakesToken; - - template -#if _MSC_VER >= 1800 - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType_abi, _ReturnType>(_Func, _Ptr, _Cts, _pRet, _callstack); - } -#else - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType_abi, _ReturnType>(_Func, _Ptr, _Cts, _pRet); - } -#endif - }; - - template - struct _AsyncAttributes<_Function, _ProgressType, _ReturnType, _TaskTraits, _TakesToken, false> - { - typedef typename ABI::Windows::Foundation::IAsyncOperation<_ReturnType> _AsyncBaseType; - typedef _Zip _ProgressDelegateType; - typedef typename ABI::Windows::Foundation::IAsyncOperationCompletedHandler<_ReturnType> _CompletionDelegateType; - typedef typename _ReturnType _ReturnType; - typedef typename ABI::Windows::Foundation::Internal::GetAbiType()))>::type _ReturnType_abi; - typedef typename _TaskTraits::_AsyncKind _AsyncKind; - typedef typename _SelectorTaskGenerator<_AsyncKind, _ReturnType> _SelectorTaskGenerator; - typedef typename _TaskGenerator<_SelectorTaskGenerator, _TakesToken, false> _TaskGenerator; - - static const bool _TakesProgress = false; - static const bool _TakesToken = _TakesToken; - - template -#if _MSC_VER >= 1800 - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType, _ReturnType>(_Func, _Ptr, _Cts, _pRet, _callstack); - } -#else - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType, _ReturnType>(_Func, _Ptr, _Cts, _pRet); - } -#endif - }; - - template - struct _AsyncAttributes<_Function, _ProgressType, void, _TaskTraits, _TakesToken, true> - { - typedef typename ABI::Windows::Foundation::IAsyncActionWithProgress<_ProgressType> _AsyncBaseType; - typedef typename ABI::Windows::Foundation::IAsyncActionProgressHandler<_ProgressType> _ProgressDelegateType; - typedef typename ABI::Windows::Foundation::IAsyncActionWithProgressCompletedHandler<_ProgressType> _CompletionDelegateType; - typedef void _ReturnType; - typedef void _ReturnType_abi; - typedef typename _ProgressType _ProgressType; - typedef typename ABI::Windows::Foundation::Internal::GetAbiType()))>::type _ProgressType_abi; - typedef typename _TaskTraits::_AsyncKind _AsyncKind; - typedef typename _SelectorTaskGenerator<_AsyncKind, _ReturnType> _SelectorTaskGenerator; - typedef typename _TaskGenerator<_SelectorTaskGenerator, _TakesToken, true> _TaskGenerator; - - static const bool _TakesProgress = true; - static const bool _TakesToken = _TakesToken; - -#if _MSC_VER >= 1800 - template - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTaskNoRet<_Function, _ClassPtr, _ProgressType_abi>(_Func, _Ptr, _Cts, _callstack); - } - template - static task> _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType_abi>(_Func, _Ptr, _Cts, _pRet, _callstack); - } -#else - template - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - { - return _TaskGenerator::_GenerateTaskNoRet<_Function, _ClassPtr, _ProgressType_abi>(_Func, _Ptr, _Cts); - } - template - static task> _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType_abi>(_Func, _Ptr, _Cts, _pRet); - } -#endif - }; - - template - struct _AsyncAttributes<_Function, _ProgressType, void, _TaskTraits, _TakesToken, false> - { - typedef typename ABI::Windows::Foundation::IAsyncAction _AsyncBaseType; - typedef _Zip _ProgressDelegateType; - typedef typename ABI::Windows::Foundation::IAsyncActionCompletedHandler _CompletionDelegateType; - typedef void _ReturnType; - typedef void _ReturnType_abi; - typedef typename _TaskTraits::_AsyncKind _AsyncKind; - typedef typename _SelectorTaskGenerator<_AsyncKind, _ReturnType> _SelectorTaskGenerator; - typedef typename _TaskGenerator<_SelectorTaskGenerator, _TakesToken, false> _TaskGenerator; - - static const bool _TakesProgress = false; - static const bool _TakesToken = _TakesToken; - -#if _MSC_VER >= 1800 - template - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTaskNoRet<_Function, _ClassPtr, _ProgressType>(_Func, _Ptr, _Cts, _callstack); - } - template - static task> _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet, const _TaskCreationCallstack & _callstack) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType>(_Func, _Ptr, _Cts, _pRet, _callstack); - } -#else - template - static task _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts) - { - return _TaskGenerator::_GenerateTaskNoRet<_Function, _ClassPtr, _ProgressType>(_Func, _Ptr, _Cts); - } - template - static task> _Generate_Task(const _Function& _Func, _ClassPtr _Ptr, Concurrency::cancellation_token_source _Cts, _ReturnType* _pRet) - { - return _TaskGenerator::_GenerateTask<_Function, _ClassPtr, _ProgressType>(_Func, _Ptr, _Cts, _pRet); - } -#endif - }; - - template - struct _AsyncLambdaTypeTraits - { - typedef typename _Unhat::_ReturnType>::_Value _ReturnType; - typedef typename _FunctorTypeTraits<_Function>::_Argument1Type _Argument1Type; - typedef typename _CAFunctorOptions<_Function>::_ProgressType _ProgressType; - - static const bool _TakesProgress = _CAFunctorOptions<_Function>::_TakesProgress; - static const bool _TakesToken = _CAFunctorOptions<_Function>::_TakesToken; - - typedef typename _TaskTypeTraits<_ReturnType> _TaskTraits; - typedef typename _AsyncAttributes<_Function, _ProgressType, typename _TaskTraits::_TaskRetType, _TaskTraits, _TakesToken, _TakesProgress> _AsyncAttributes; - }; - // *************************************************************************** - // AsyncInfo (and completion) Layer: - // -#ifndef RUNTIMECLASS_Concurrency_winrt_details__AsyncInfoBase_DEFINED -#define RUNTIMECLASS_Concurrency_winrt_details__AsyncInfoBase_DEFINED - extern const __declspec(selectany) WCHAR RuntimeClass_Concurrency_winrt_details__AsyncInfoBase[] = L"Concurrency_winrt.details._AsyncInfoBase"; -#endif - - // - // Internal base class implementation for async operations (based on internal Windows representation for ABI level async operations) - // - template < typename _Attributes, _AsyncResultType resultType = SingleResult > - class _AsyncInfoBase abstract : public Microsoft::WRL::RuntimeClass< - Microsoft::WRL::RuntimeClassFlags< Microsoft::WRL::RuntimeClassType::WinRt>, Microsoft::WRL::Implements> - { - InspectableClass(RuntimeClass_Concurrency_winrt_details__AsyncInfoBase, BaseTrust) - public: - _AsyncInfoBase() : - _M_currentStatus(_AsyncStatusInternal::_AsyncCreated), - _M_errorCode(S_OK), - _M_completeDelegate(nullptr), - _M_CompleteDelegateAssigned(0), - _M_CallbackMade(0) - { -#if _MSC_VER < 1800 - _M_id = Concurrency::details::_GetNextAsyncId(); -#else - _M_id = Concurrency::details::platform::GetNextAsyncId(); -#endif - } - public: - virtual STDMETHODIMP GetResults(typename _Attributes::_ReturnType_abi* results) - { - (void)results; - return E_UNEXPECTED; - } - - virtual STDMETHODIMP get_Id(unsigned int* id) - { - HRESULT hr = _CheckValidStateForAsyncInfoCall(); - if (FAILED(hr)) return hr; - if (!id) return E_POINTER; - *id = _M_id; - return S_OK; - } - - virtual STDMETHODIMP put_Id(unsigned int id) - { - HRESULT hr = _CheckValidStateForAsyncInfoCall(); - if (FAILED(hr)) return hr; - - if (id == 0) - { - return E_INVALIDARG; - } - else if (_M_currentStatus != _AsyncStatusInternal::_AsyncCreated) - { - return E_ILLEGAL_METHOD_CALL; - } - - _M_id = id; - return S_OK; - } - virtual STDMETHODIMP get_Status(ABI::Windows::Foundation::AsyncStatus* status) - { - HRESULT hr = _CheckValidStateForAsyncInfoCall(); - if (FAILED(hr)) return hr; - if (!status) return E_POINTER; - - _AsyncStatusInternal _Current = _M_currentStatus; - // - // Map our internal cancel pending to cancelled. This way "pending cancelled" looks to the outside as "cancelled" but - // can still transition to "completed" if the operation completes without acknowledging the cancellation request - // - switch (_Current) - { - case _AsyncCancelPending: - _Current = _AsyncCanceled; - break; - case _AsyncCreated: - _Current = _AsyncStarted; - break; - default: - break; - } - - *status = static_cast(_Current); - return S_OK; - } - - virtual STDMETHODIMP get_ErrorCode(HRESULT* errorCode) - { - HRESULT hr = _CheckValidStateForAsyncInfoCall(); - if (FAILED(hr)) return hr; - if (!hr) return hr; - *errorCode = _M_errorCode; - return S_OK; - } - - virtual STDMETHODIMP get_Progress(typename _Attributes::_ProgressDelegateType** _ProgressHandler) - { - return _GetOnProgress(_ProgressHandler); - } - - virtual STDMETHODIMP put_Progress(typename _Attributes::_ProgressDelegateType* _ProgressHandler) - { - return _PutOnProgress(_ProgressHandler); - } - - virtual STDMETHODIMP Cancel() - { - if (_TransitionToState(_AsyncCancelPending)) - { - _OnCancel(); - } - return S_OK; - } - - virtual STDMETHODIMP Close() - { - if (_TransitionToState(_AsyncClosed)) - { - _OnClose(); - } - else - { - if (_M_currentStatus != _AsyncClosed) // Closed => Closed transition is just ignored - { - return E_ILLEGAL_STATE_CHANGE; - } - } - return S_OK; - } - - virtual STDMETHODIMP get_Completed(typename _Attributes::_CompletionDelegateType** _CompleteHandler) - { - _CheckValidStateForDelegateCall(); - if (!_CompleteHandler) return E_POINTER; - *_CompleteHandler = _M_completeDelegate.Get(); - return S_OK; - } - - virtual STDMETHODIMP put_Completed(typename _Attributes::_CompletionDelegateType* _CompleteHandler) - { - _CheckValidStateForDelegateCall(); - // this delegate property is "write once" - if (InterlockedIncrement(&_M_CompleteDelegateAssigned) == 1) - { - _M_completeDelegateContext = _ContextCallback::_CaptureCurrent(); - _M_completeDelegate = _CompleteHandler; - // Guarantee that the write of _M_completeDelegate is ordered with respect to the read of state below - // as perceived from _FireCompletion on another thread. - MemoryBarrier(); - if (_IsTerminalState()) - { - _FireCompletion(); - } - } - else - { - return E_ILLEGAL_DELEGATE_ASSIGNMENT; - } - return S_OK; - } - - protected: - // _Start - this is not externally visible since async operations "hot start" before returning to the caller - STDMETHODIMP _Start() - { - if (_TransitionToState(_AsyncStarted)) - { - _OnStart(); - } - else - { - return E_ILLEGAL_STATE_CHANGE; - } - return S_OK; - } - - HRESULT _FireCompletion() - { - HRESULT hr = S_OK; - _TryTransitionToCompleted(); - - // we guarantee that completion can only ever be fired once - if (_M_completeDelegate != nullptr && InterlockedIncrement(&_M_CallbackMade) == 1) - { - hr = _M_completeDelegateContext._CallInContext([=]() -> HRESULT { - ABI::Windows::Foundation::AsyncStatus status; - HRESULT hr; - if (SUCCEEDED(hr = this->get_Status(&status))) - _M_completeDelegate->Invoke((_Attributes::_AsyncBaseType*)this, status); - _M_completeDelegate = nullptr; - return hr; - }); - } - return hr; - } - - virtual STDMETHODIMP _GetOnProgress(typename _Attributes::_ProgressDelegateType** _ProgressHandler) - { - (void)_ProgressHandler; - return E_UNEXPECTED; - } - - virtual STDMETHODIMP _PutOnProgress(typename _Attributes::_ProgressDelegateType* _ProgressHandler) - { - (void)_ProgressHandler; - return E_UNEXPECTED; - } - - - bool _TryTransitionToCompleted() - { - return _TransitionToState(_AsyncStatusInternal::_AsyncCompleted); - } - - bool _TryTransitionToCancelled() - { - return _TransitionToState(_AsyncStatusInternal::_AsyncCanceled); - } - - bool _TryTransitionToError(const HRESULT error) - { - _InterlockedCompareExchange(reinterpret_cast(&_M_errorCode), error, S_OK); - return _TransitionToState(_AsyncStatusInternal::_AsyncError); - } - - // This method checks to see if the delegate properties can be - // modified in the current state and generates the appropriate - // error hr in the case of violation. - inline HRESULT _CheckValidStateForDelegateCall() - { - if (_M_currentStatus == _AsyncClosed) - { - return E_ILLEGAL_METHOD_CALL; - } - return S_OK; - } - - // This method checks to see if results can be collected in the - // current state and generates the appropriate error hr in - // the case of a violation. - inline HRESULT _CheckValidStateForResultsCall() - { - _AsyncStatusInternal _Current = _M_currentStatus; - - if (_Current == _AsyncError) - { - return _M_errorCode; - } -#pragma warning(push) -#pragma warning(disable: 4127) // Conditional expression is constant - // single result illegal before transition to Completed or Cancelled state - if (resultType == SingleResult) -#pragma warning(pop) - { - if (_Current != _AsyncCompleted) - { - return E_ILLEGAL_METHOD_CALL; - } - } - // multiple results can be called after Start has been called and before/after Completed - else if (_Current != _AsyncStarted && - _Current != _AsyncCancelPending && - _Current != _AsyncCanceled && - _Current != _AsyncCompleted) - { - return E_ILLEGAL_METHOD_CALL; - } - return S_OK; - } - - // This method can be called by derived classes periodically to determine - // whether the asynchronous operation should continue processing or should - // be halted. - inline bool _ContinueAsyncOperation() - { - return _M_currentStatus == _AsyncStarted; - } - - // These two methods are used to allow the async worker implementation do work on - // state transitions. No real "work" should be done in these methods. In other words - // they should not block for a long time on UI timescales. - virtual void _OnStart() = 0; - virtual void _OnClose() = 0; - virtual void _OnCancel() = 0; - - private: - - // This method is used to check if calls to the AsyncInfo properties - // (id, status, errorcode) are legal in the current state. It also - // generates the appropriate error hr to return in the case of an - // illegal call. - inline HRESULT _CheckValidStateForAsyncInfoCall() - { - _AsyncStatusInternal _Current = _M_currentStatus; - if (_Current == _AsyncClosed) - { - return E_ILLEGAL_METHOD_CALL; - } - else if (_Current == _AsyncCreated) - { - return E_ASYNC_OPERATION_NOT_STARTED; - } - return S_OK; - } - - inline bool _TransitionToState(const _AsyncStatusInternal _NewState) - { - _AsyncStatusInternal _Current = _M_currentStatus; - - // This enforces the valid state transitions of the asynchronous worker object - // state machine. - switch (_NewState) - { - case _AsyncStatusInternal::_AsyncStarted: - if (_Current != _AsyncCreated) - { - return false; - } - break; - case _AsyncStatusInternal::_AsyncCompleted: - if (_Current != _AsyncStarted && _Current != _AsyncCancelPending) - { - return false; - } - break; - case _AsyncStatusInternal::_AsyncCancelPending: - if (_Current != _AsyncStarted) - { - return false; - } - break; - case _AsyncStatusInternal::_AsyncCanceled: - if (_Current != _AsyncStarted && _Current != _AsyncCancelPending) - { - return false; - } - break; - case _AsyncStatusInternal::_AsyncError: - if (_Current != _AsyncStarted && _Current != _AsyncCancelPending) - { - return false; - } - break; - case _AsyncStatusInternal::_AsyncClosed: - if (!_IsTerminalState(_Current)) - { - return false; - } - break; - default: - return false; - break; - } - - // attempt the transition to the new state - // Note: if currentStatus_ == _Current, then there was no intervening write - // by the async work object and the swap succeeded. - _AsyncStatusInternal _RetState = static_cast<_AsyncStatusInternal>( - _InterlockedCompareExchange(reinterpret_cast(&_M_currentStatus), - _NewState, - static_cast(_Current))); - - // ICE returns the former state, if the returned state and the - // state we captured at the beginning of this method are the same, - // the swap succeeded. - return (_RetState == _Current); - } - - inline bool _IsTerminalState() - { - return _IsTerminalState(_M_currentStatus); - } - - inline bool _IsTerminalState(_AsyncStatusInternal status) - { - return (status == _AsyncError || - status == _AsyncCanceled || - status == _AsyncCompleted || - status == _AsyncClosed); - } - - private: - - _ContextCallback _M_completeDelegateContext; - Microsoft::WRL::ComPtr _M_completeDelegate; //ComPtr cannot be volatile as it does not have volatile accessors - _AsyncStatusInternal volatile _M_currentStatus; - HRESULT volatile _M_errorCode; - unsigned int _M_id; - long volatile _M_CompleteDelegateAssigned; - long volatile _M_CallbackMade; - }; - - // *************************************************************************** - // Progress Layer (optional): - // - - template< typename _Attributes, bool _HasProgress, _AsyncResultType _ResultType = SingleResult > - class _AsyncProgressBase abstract : public _AsyncInfoBase<_Attributes, _ResultType> - { - }; - - template< typename _Attributes, _AsyncResultType _ResultType> - class _AsyncProgressBase<_Attributes, true, _ResultType> abstract : public _AsyncInfoBase<_Attributes, _ResultType> - { - public: - - _AsyncProgressBase() : _AsyncInfoBase<_Attributes, _ResultType>(), - _M_progressDelegate(nullptr) - { - } - - virtual STDMETHODIMP _GetOnProgress(typename _Attributes::_ProgressDelegateType** _ProgressHandler) override - { - HRESULT hr = _CheckValidStateForDelegateCall(); - if (FAILED(hr)) return hr; - *_ProgressHandler = _M_progressDelegate; - return S_OK; - } - - virtual STDMETHODIMP _PutOnProgress(typename _Attributes::_ProgressDelegateType* _ProgressHandler) override - { - HRESULT hr = _CheckValidStateForDelegateCall(); - if (FAILED(hr)) return hr; - _M_progressDelegate = _ProgressHandler; - _M_progressDelegateContext = _ContextCallback::_CaptureCurrent(); - return S_OK; - } - - public: - - void _FireProgress(const typename _Attributes::_ProgressType_abi& _ProgressValue) - { - if (_M_progressDelegate != nullptr) - { - _M_progressDelegateContext._CallInContext([=]() -> HRESULT { - _M_progressDelegate->Invoke((_Attributes::_AsyncBaseType*)this, _ProgressValue); - return S_OK; - }); - } - } - - private: - - _ContextCallback _M_progressDelegateContext; - typename _Attributes::_ProgressDelegateType* _M_progressDelegate; - }; - - template - class _AsyncBaseProgressLayer abstract : public _AsyncProgressBase<_Attributes, _Attributes::_TakesProgress, _ResultType> - { - }; - - // *************************************************************************** - // Task Adaptation Layer: - // - - // - // _AsyncTaskThunkBase provides a bridge between IAsync and task. - // - template - class _AsyncTaskThunkBase abstract : public _AsyncBaseProgressLayer<_Attributes> - { - public: - - //AsyncAction* - virtual STDMETHODIMP GetResults() - { - HRESULT hr = _CheckValidStateForResultsCall(); - if (FAILED(hr)) return hr; - _M_task.get(); - return S_OK; - } - public: - typedef task<_ReturnType> _TaskType; - - _AsyncTaskThunkBase(const _TaskType& _Task) - : _M_task(_Task) - { - } - - _AsyncTaskThunkBase() - { - } -#if _MSC_VER < 1800 - void _SetTaskCreationAddressHint(void* _SourceAddressHint) - { - if (!(std::is_same<_Attributes::_AsyncKind, _TypeSelectorAsyncTask>::value)) - { - // Overwrite the creation address with the return address of create_async unless the - // lambda returned a task. If the create async lambda returns a task, that task is reused and - // we want to preserve its creation address hint. - _M_task._SetTaskCreationAddressHint(_SourceAddressHint); - } - } -#endif - protected: - virtual void _OnStart() override - { - _M_task.then([=](_TaskType _Antecedent) -> HRESULT { - try - { - _Antecedent.get(); - } - catch (Concurrency::task_canceled&) - { - _TryTransitionToCancelled(); - } - catch (IRestrictedErrorInfo*& _Ex) - { - HRESULT hr; - HRESULT _hr; - hr = _Ex->GetErrorDetails(NULL, &_hr, NULL, NULL); - if (SUCCEEDED(hr)) hr = _hr; - _TryTransitionToError(hr); - } - catch (...) - { - _TryTransitionToError(E_FAIL); - } - return _FireCompletion(); - }); - } - - protected: - _TaskType _M_task; - Concurrency::cancellation_token_source _M_cts; - }; - - template - class _AsyncTaskReturn abstract : public _AsyncTaskThunkBase<_Attributes, _Return> - { - public: - //AsyncOperation* - virtual STDMETHODIMP GetResults(_ReturnType* results) - { - HRESULT hr = _CheckValidStateForResultsCall(); - if (FAILED(hr)) return hr; - _M_task.get(); - *results = _M_results; - return S_OK; - } - template -#if _MSC_VER >= 1800 - void DoCreateTask(_Function _func, const _TaskCreationCallstack & _callstack) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts, &_M_results, _callstack); - } -#else - void DoCreateTask(_Function _func) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts, &_M_results); - } -#endif - protected: - _ReturnType _M_results; - }; - - template - class _AsyncTaskReturn<_Attributes, _ReturnType, void> abstract : public _AsyncTaskThunkBase<_Attributes, void> - { - public: - template -#if _MSC_VER >= 1800 - void DoCreateTask(_Function _func, const _TaskCreationCallstack & _callstack) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts, _callstack); - } -#else - void DoCreateTask(_Function _func) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts); - } -#endif - }; - - template - class _AsyncTaskReturn<_Attributes, void, task> abstract : public _AsyncTaskThunkBase<_Attributes, task> - { - public: - template -#if _MSC_VER >= 1800 - void DoCreateTask(_Function _func, const _TaskCreationCallstack & _callstack) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts, &_M_results, _callstack); - } -#else - void DoCreateTask(_Function _func) - { - _M_task = _Attributes::_Generate_Task(_func, this, _M_cts, &_M_results); - } -#endif - protected: - task _M_results; - }; - - template - class _AsyncTaskThunk : public _AsyncTaskReturn<_Attributes, typename _Attributes::_ReturnType_abi, typename _Attributes::_ReturnType> - { - public: - - _AsyncTaskThunk(const _TaskType& _Task) : - _AsyncTaskThunkBase(_Task) - { - } - - _AsyncTaskThunk() - { - } - - protected: - - virtual void _OnClose() override - { - } - - virtual void _OnCancel() override - { - _M_cts.cancel(); - } - }; - - // *************************************************************************** - // Async Creation Layer: - // - template - class _AsyncTaskGeneratorThunk : public _AsyncTaskThunk::_AsyncAttributes> - { - public: - - typedef typename _AsyncLambdaTypeTraits<_Function>::_AsyncAttributes _Attributes; - typedef typename _AsyncTaskThunk<_Attributes> _Base; - typedef typename _Attributes::_AsyncBaseType _AsyncBaseType; - -#if _MSC_VER >= 1800 - _AsyncTaskGeneratorThunk(const _Function& _Func, const _TaskCreationCallstack &_callstack) : _M_func(_Func), _M_creationCallstack(_callstack) -#else - _AsyncTaskGeneratorThunk(const _Function& _Func) : _M_func(_Func) -#endif - { - // Virtual call here is safe as the class is declared 'sealed' - _Start(); - } - - protected: - - // - // The only thing we must do different from the base class is we must spin the hot task on transition from Created->Started. Otherwise, - // let the base thunk handle everything. - // - - virtual void _OnStart() override - { - // - // Call the appropriate task generator to actually produce a task of the expected type. This might adapt the user lambda for progress reports, - // wrap the return result in a task, or allow for direct return of a task depending on the form of the lambda. - // -#if _MSC_VER >= 1800 - DoCreateTask<_Function>(_M_func, _M_creationCallstack); -#else - DoCreateTask<_Function>(_M_func); -#endif - _Base::_OnStart(); - } - - virtual void _OnCancel() override - { - _Base::_OnCancel(); - } - - private: -#if _MSC_VER >= 1800 - _TaskCreationCallstack _M_creationCallstack; -#endif - _Function _M_func; - }; -} // namespace details - -/// -/// Creates a Windows Runtime asynchronous construct based on a user supplied lambda or function object. The return type of create_async is -/// one of either IAsyncAction^, IAsyncActionWithProgress<TProgress>^, IAsyncOperation<TResult>^, or -/// IAsyncOperationWithProgress<TResult, TProgress>^ based on the signature of the lambda passed to the method. -/// -/// -/// The lambda or function object from which to create a Windows Runtime asynchronous construct. -/// -/// -/// An asynchronous construct represented by an IAsyncAction^, IAsyncActionWithProgress<TProgress>^, IAsyncOperation<TResult>^, or an -/// IAsyncOperationWithProgress<TResult, TProgress>^. The interface returned depends on the signature of the lambda passed into the function. -/// -/// -/// The return type of the lambda determines whether the construct is an action or an operation. -/// Lambdas that return void cause the creation of actions. Lambdas that return a result of type TResult cause the creation of -/// operations of TResult. -/// The lambda may also return a task<TResult> which encapsulates the aysnchronous work within itself or is the continuation of -/// a chain of tasks that represent the asynchronous work. In this case, the lambda itself is executed inline, since the tasks are the ones that -/// execute asynchronously, and the return type of the lambda is unwrapped to produce the asynchronous construct returned by create_async. -/// This implies that a lambda that returns a task<void> will cause the creation of actions, and a lambda that returns a task<TResult> will -/// cause the creation of operations of TResult. -/// The lambda may take either zero, one or two arguments. The valid arguments are progress_reporter<TProgress> and -/// cancellation_token, in that order if both are used. A lambda without arguments causes the creation of an asynchronous construct without -/// the capability for progress reporting. A lambda that takes a progress_reporter<TProgress> will cause create_async to return an asynchronous -/// construct which reports progress of type TProgress each time the report method of the progress_reporter object is called. A lambda that -/// takes a cancellation_token may use that token to check for cancellation, or pass it to tasks that it creates so that cancellation of the -/// asynchronous construct causes cancellation of those tasks. -/// If the body of the lambda or function object returns a result (and not a task<TResult>), the lamdba will be executed -/// asynchronously within the process MTA in the context of a task the Runtime implicitly creates for it. The IAsyncInfo::Cancel method will -/// cause cancellation of the implicit task. -/// If the body of the lambda returns a task, the lamba executes inline, and by declaring the lambda to take an argument of type -/// cancellation_token you can trigger cancellation of any tasks you create within the lambda by passing that token in when you create them. -/// You may also use the register_callback method on the token to cause the Runtime to invoke a callback when you call IAsyncInfo::Cancel on -/// the async operation or action produced.. -/// This function is only available to Windows Store apps. -/// -/// -/// -/// -/**/ -template -__declspec(noinline) // Ask for no inlining so that the _ReturnAddress intrinsic gives us the expected result -details::_AsyncTaskGeneratorThunk<_Function>* create_async(const _Function& _Func) -{ - static_assert(std::is_same(_Func, 0, 0, 0, 0, 0, 0, 0, 0)), std::true_type>::value, - "argument to create_async must be a callable object taking zero, one, two or three arguments"); -#if _MSC_VER >= 1800 - Microsoft::WRL::ComPtr> _AsyncInfo = Microsoft::WRL::Make>(_Func, _CAPTURE_CALLSTACK()); -#else - Microsoft::WRL::ComPtr> _AsyncInfo = Microsoft::WRL::Make>(_Func); - _AsyncInfo->_SetTaskCreationAddressHint(_ReturnAddress()); -#endif - return _AsyncInfo.Detach(); -} - -namespace details -{ -#if _MSC_VER < 1800 - // Internal API which retrieves the next async id. - _CRTIMP2 unsigned int __cdecl _GetNextAsyncId(); -#endif - // Helper struct for when_all operators to know when tasks have completed - template - struct _RunAllParam - { - _RunAllParam() : _M_completeCount(0), _M_numTasks(0) - { - } - - void _Resize(size_t _Len, bool _SkipVector = false) - { - _M_numTasks = _Len; - if (!_SkipVector) -#if _MSC_VER >= 1800 - { - _M_vector._Result.resize(_Len); - } -#else - _M_vector.resize(_Len); - _M_contexts.resize(_Len); -#endif - } - - task_completion_event<_Unit_type> _M_completed; - atomic_size_t _M_completeCount; -#if _MSC_VER >= 1800 - _ResultHolder > _M_vector; - _ResultHolder<_Type> _M_mergeVal; -#else - std::vector<_Type> _M_vector; - std::vector<_ContextCallback> _M_contexts; - _Type _M_mergeVal; -#endif - size_t _M_numTasks; - }; - -#if _MSC_VER >= 1800 - template - struct _RunAllParam > - { - _RunAllParam() : _M_completeCount(0), _M_numTasks(0) - { - } - - void _Resize(size_t _Len, bool _SkipVector = false) - { - _M_numTasks = _Len; - - if (!_SkipVector) - { - _M_vector.resize(_Len); - } - } - - task_completion_event<_Unit_type> _M_completed; - std::vector<_ResultHolder > > _M_vector; - atomic_size_t _M_completeCount; - size_t _M_numTasks; - }; -#endif - - // Helper struct specialization for void - template<> -#if _MSC_VER >= 1800 - struct _RunAllParam<_Unit_type> -#else - struct _RunAllParam -#endif - { - _RunAllParam() : _M_completeCount(0), _M_numTasks(0) - { - } - - void _Resize(size_t _Len) - { - _M_numTasks = _Len; - } - - task_completion_event<_Unit_type> _M_completed; - atomic_size_t _M_completeCount; - size_t _M_numTasks; - }; - - inline void _JoinAllTokens_Add(const Concurrency::cancellation_token_source& _MergedSrc, Concurrency::details::_CancellationTokenState *_PJoinedTokenState) - { - if (_PJoinedTokenState != nullptr && _PJoinedTokenState != Concurrency::details::_CancellationTokenState::_None()) - { - Concurrency::cancellation_token _T = Concurrency::cancellation_token::_FromImpl(_PJoinedTokenState); - _T.register_callback([=](){ - _MergedSrc.cancel(); - }); - } - } - - template - void _WhenAllContinuationWrapper(_RunAllParam<_ElementType>* _PParam, _Function _Func, task<_TaskType>& _Task) - { - if (_Task._GetImpl()->_IsCompleted()) - { - _Func(); -#if _MSC_VER >= 1800 - if (Concurrency::details::atomic_increment(_PParam->_M_completeCount) == _PParam->_M_numTasks) -#else - if (_InterlockedIncrementSizeT(&_PParam->_M_completeCount) == _PParam->_M_numTasks) -#endif - { - // Inline execute its direct continuation, the _ReturnTask - _PParam->_M_completed.set(_Unit_type()); - // It's safe to delete it since all usage of _PParam in _ReturnTask has been finished. - delete _PParam; - } - } - else - { - _CONCRT_ASSERT(_Task._GetImpl()->_IsCanceled()); - if (_Task._GetImpl()->_HasUserException()) - { - // _Cancel will return false if the TCE is already canceled with or without exception - _PParam->_M_completed._Cancel(_Task._GetImpl()->_GetExceptionHolder()); - } - else - { - _PParam->_M_completed._Cancel(); - } -#if _MSC_VER >= 1800 - if (Concurrency::details::atomic_increment(_PParam->_M_completeCount) == _PParam->_M_numTasks) -#else - if (_InterlockedIncrementSizeT(&_PParam->_M_completeCount) == _PParam->_M_numTasks) -#endif - { - delete _PParam; - } - } - } - - template - struct _WhenAllImpl - { -#if _MSC_VER >= 1800 - static task> _Perform(const task_options& _TaskOptions, _Iterator _Begin, _Iterator _End) -#else - static task> _Perform(Concurrency::details::_CancellationTokenState *_PTokenState, _Iterator _Begin, _Iterator _End) -#endif - { -#if _MSC_VER >= 1800 - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; -#endif - auto _PParam = new _RunAllParam<_ElementType>(); - Concurrency::cancellation_token_source _MergedSource; - - // Step1: Create task completion event. -#if _MSC_VER >= 1800 - task_options _Options(_TaskOptions); - _Options.set_cancellation_token(_MergedSource.get_token()); - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _Options); -#else - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _MergedSource.get_token()); -#endif - // The return task must be created before step 3 to enforce inline execution. - auto _ReturnTask = _All_tasks_completed._Then([=](_Unit_type, std::vector<_ElementType>* retVal) -> HRESULT { -#if _MSC_VER >= 1800 - * retVal = _PParam->_M_vector.Get(); -#else - auto _Result = _PParam->_M_vector; // copy by value - - size_t _Index = 0; - for (auto _It = _Result.begin(); _It != _Result.end(); ++_It) - { - *_It = _ResultContext<_ElementType>::_GetValue(*_It, _PParam->_M_contexts[_Index++], false); - } - *retVal = _Result; -#endif - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, true); -#endif - // Step2: Combine and check tokens, and count elements in range. - if (_PTokenState) - { - details::_JoinAllTokens_Add(_MergedSource, _PTokenState); - _PParam->_Resize(static_cast(std::distance(_Begin, _End))); - } - else - { - size_t _TaskNum = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - _TaskNum++; - details::_JoinAllTokens_Add(_MergedSource, _PTask->_GetImpl()->_M_pTokenState); - } - _PParam->_Resize(_TaskNum); - } - - // Step3: Check states of previous tasks. - if (_Begin == _End) - { - _PParam->_M_completed.set(_Unit_type()); - delete _PParam; - } - else - { - size_t _Index = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - if (_PTask->is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PTask->_Then([_PParam, _Index](task<_ElementType> _ResultTask) -> HRESULT { - -#if _MSC_VER >= 1800 - // Dev10 compiler bug - typedef _ElementType _ElementTypeDev10; - auto _PParamCopy = _PParam; - auto _IndexCopy = _Index; - auto _Func = [_PParamCopy, _IndexCopy, &_ResultTask](){ - _PParamCopy->_M_vector._Result[_IndexCopy] = _ResultTask._GetImpl()->_GetResult(); - }; -#else - auto _Func = [_PParam, _Index, &_ResultTask](){ - _PParam->_M_vector[_Index] = _ResultTask._GetImpl()->_GetResult(); - _PParam->_M_contexts[_Index] = _ResultContext<_ElementType>::_GetContext(false); - }; -#endif - _WhenAllContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - - _Index++; - } - } - - return _ReturnTask; - } - }; - - template - struct _WhenAllImpl, _Iterator> - { -#if _MSC_VER >= 1800 - static task> _Perform(const task_options& _TaskOptions, _Iterator _Begin, _Iterator _End) -#else - static task> _Perform(Concurrency::details::_CancellationTokenState *_PTokenState, _Iterator _Begin, _Iterator _End) -#endif - { -#if _MSC_VER >= 1800 - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; -#endif - auto _PParam = new _RunAllParam>(); - Concurrency::cancellation_token_source _MergedSource; - - // Step1: Create task completion event. -#if _MSC_VER >= 1800 - task_options _Options(_TaskOptions); - _Options.set_cancellation_token(_MergedSource.get_token()); - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _Options); -#else - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _MergedSource.get_token()); -#endif - // The return task must be created before step 3 to enforce inline execution. - auto _ReturnTask = _All_tasks_completed._Then([=](_Unit_type, std::vector<_ElementType>* retVal) -> HRESULT { - _CONCRT_ASSERT(_PParam->_M_completeCount == _PParam->_M_numTasks); - std::vector<_ElementType> _Result; - for (size_t _I = 0; _I < _PParam->_M_numTasks; _I++) - { -#if _MSC_VER >= 1800 - const std::vector<_ElementType>& _Vec = _PParam->_M_vector[_I].Get(); -#else - std::vector<_ElementType>& _Vec = _PParam->_M_vector[_I]; - - for (auto _It = _Vec.begin(); _It != _Vec.end(); ++_It) - { - *_It = _ResultContext<_ElementType>::_GetValue(*_It, _PParam->_M_contexts[_I], false); - } -#endif - _Result.insert(_Result.end(), _Vec.begin(), _Vec.end()); - } - *retVal = _Result; - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, true); -#endif - - // Step2: Combine and check tokens, and count elements in range. - if (_PTokenState) - { - details::_JoinAllTokens_Add(_MergedSource, _PTokenState); - _PParam->_Resize(static_cast(std::distance(_Begin, _End))); - } - else - { - size_t _TaskNum = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - _TaskNum++; - details::_JoinAllTokens_Add(_MergedSource, _PTask->_GetImpl()->_M_pTokenState); - } - _PParam->_Resize(_TaskNum); - } - - // Step3: Check states of previous tasks. - if (_Begin == _End) - { - _PParam->_M_completed.set(_Unit_type()); - delete _PParam; - } - else - { - size_t _Index = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - if (_PTask->is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PTask->_Then([_PParam, _Index](task> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - typedef _ElementType _ElementTypeDev10; - auto _PParamCopy = _PParam; - auto _IndexCopy = _Index; - auto _Func = [_PParamCopy, _IndexCopy, &_ResultTask]() { - _PParamCopy->_M_vector[_IndexCopy].Set(_ResultTask._GetImpl()->_GetResult()); - }; -#else - auto _Func = [_PParam, _Index, &_ResultTask]() { - _PParam->_M_vector[_Index] = _ResultTask._GetImpl()->_GetResult(); - _PParam->_M_contexts[_Index] = _ResultContext<_ElementType>::_GetContext(false); - }; -#endif - _WhenAllContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - - _Index++; - } - } - - return _ReturnTask; - } - }; - - template - struct _WhenAllImpl - { -#if _MSC_VER >= 1800 - static task _Perform(const task_options& _TaskOptions, _Iterator _Begin, _Iterator _End) -#else - static task _Perform(Concurrency::details::_CancellationTokenState *_PTokenState, _Iterator _Begin, _Iterator _End) -#endif - { -#if _MSC_VER >= 1800 - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; -#endif - auto _PParam = new _RunAllParam<_Unit_type>(); - Concurrency::cancellation_token_source _MergedSource; - - // Step1: Create task completion event. -#if _MSC_VER >= 1800 - task_options _Options(_TaskOptions); - _Options.set_cancellation_token(_MergedSource.get_token()); - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _Options); -#else - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _MergedSource.get_token()); -#endif - // The return task must be created before step 3 to enforce inline execution. - auto _ReturnTask = _All_tasks_completed._Then([=](_Unit_type) -> HRESULT { return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, false); -#endif - - // Step2: Combine and check tokens, and count elements in range. - if (_PTokenState) - { - details::_JoinAllTokens_Add(_MergedSource, _PTokenState); - _PParam->_Resize(static_cast(std::distance(_Begin, _End))); - } - else - { - size_t _TaskNum = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - _TaskNum++; - details::_JoinAllTokens_Add(_MergedSource, _PTask->_GetImpl()->_M_pTokenState); - } - _PParam->_Resize(_TaskNum); - } - - // Step3: Check states of previous tasks. - if (_Begin == _End) - { - _PParam->_M_completed.set(_Unit_type()); - delete _PParam; - } - else - { - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - if (_PTask->is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PTask->_Then([_PParam](task _ResultTask) -> HRESULT { - - auto _Func = []() -> HRESULT { return S_OK; }; - _WhenAllContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - } - } - - return _ReturnTask; - } - }; - - template - task> _WhenAllVectorAndValue(const task>& _VectorTask, const task<_ReturnType>& _ValueTask, - bool _OutputVectorFirst) - { - auto _PParam = new _RunAllParam<_ReturnType>(); - Concurrency::cancellation_token_source _MergedSource; - - // Step1: Create task completion event. - task<_Unit_type> _All_tasks_completed(_PParam->_M_completed, _MergedSource.get_token()); - // The return task must be created before step 3 to enforce inline execution. - auto _ReturnTask = _All_tasks_completed._Then([=](_Unit_type, std::vector<_ReturnType>* retVal) -> HRESULT { - _CONCRT_ASSERT(_PParam->_M_completeCount == 2); -#if _MSC_VER >= 1800 - auto _Result = _PParam->_M_vector.Get(); // copy by value - auto _mergeVal = _PParam->_M_mergeVal.Get(); -#else - auto _Result = _PParam->_M_vector; // copy by value - for (auto _It = _Result.begin(); _It != _Result.end(); ++_It) - { - *_It = _ResultContext<_ReturnType>::_GetValue(*_It, _PParam->_M_contexts[0], false); - } -#endif - - if (_OutputVectorFirst == true) - { -#if _MSC_VER >= 1800 - _Result.push_back(_mergeVal); -#else - _Result.push_back(_ResultContext<_ReturnType>::_GetValue(_PParam->_M_mergeVal, _PParam->_M_contexts[1], false)); -#endif - } - else - { -#if _MSC_VER >= 1800 - _Result.insert(_Result.begin(), _mergeVal); -#else - _Result.insert(_Result.begin(), _ResultContext<_ReturnType>::_GetValue(_PParam->_M_mergeVal, _PParam->_M_contexts[1], false)); -#endif - } - *retVal = _Result; - return S_OK; - }, nullptr, true); - - // Step2: Combine and check tokens. - _JoinAllTokens_Add(_MergedSource, _VectorTask._GetImpl()->_M_pTokenState); - _JoinAllTokens_Add(_MergedSource, _ValueTask._GetImpl()->_M_pTokenState); - - // Step3: Check states of previous tasks. - _PParam->_Resize(2, true); - - if (_VectorTask.is_apartment_aware() || _ValueTask.is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - _VectorTask._Then([_PParam](task> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - typedef _ReturnType _ReturnTypeDev10; - auto _PParamCopy = _PParam; - auto _Func = [_PParamCopy, &_ResultTask]() { - auto _ResultLocal = _ResultTask._GetImpl()->_GetResult(); - _PParamCopy->_M_vector.Set(_ResultLocal); - }; -#else - auto _Func = [_PParam, &_ResultTask]() { - _PParam->_M_vector = _ResultTask._GetImpl()->_GetResult(); - _PParam->_M_contexts[0] = _ResultContext<_ReturnType>::_GetContext(false); - }; -#endif - - _WhenAllContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, _CancellationTokenState::_None()); -#else - }, _CancellationTokenState::_None(), false); -#endif - _ValueTask._Then([_PParam](task<_ReturnType> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - typedef _ReturnType _ReturnTypeDev10; - auto _PParamCopy = _PParam; - auto _Func = [_PParamCopy, &_ResultTask]() { - auto _ResultLocal = _ResultTask._GetImpl()->_GetResult(); - _PParamCopy->_M_mergeVal.Set(_ResultLocal); - }; -#else - auto _Func = [_PParam, &_ResultTask]() { - _PParam->_M_mergeVal = _ResultTask._GetImpl()->_GetResult(); - _PParam->_M_contexts[1] = _ResultContext<_ReturnType>::_GetContext(false); - }; -#endif - _WhenAllContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, _CancellationTokenState::_None()); -#else - }, _CancellationTokenState::_None(), false); -#endif - - return _ReturnTask; - } -} // namespace details - -#if _MSC_VER < 1800 -/// -/// Creates a task that will complete successfully when all of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the input iterator. -/// -/// -/// The position of the first element in the range of elements to be combined into the resulting task. -/// -/// -/// The position of the first element beyond the range of elements to be combined into the resulting task. -/// -/// -/// A task that completes sucessfully when all of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -auto when_all(_Iterator _Begin, _Iterator _End) --> decltype (details::_WhenAllImpl::value_type::result_type, _Iterator>::_Perform(nullptr, _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAllImpl<_ElementType, _Iterator>::_Perform(nullptr, _Begin, _End); -} -#endif - -/// -/// Creates a task that will complete successfully when all of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the input iterator. -/// -/// -/// The position of the first element in the range of elements to be combined into the resulting task. -/// -/// -/// The position of the first element beyond the range of elements to be combined into the resulting task. -/// -/// -/// The cancellation token which controls cancellation of the returned task. If you do not provide a cancellation token, the resulting -/// task will be created with a token that is a combination of all the cancelable tokens (tokens created by methods other than -/// cancellation_token::none()of the tasks supplied. -/// -/// -/// A task that completes sucessfully when all of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -#if _MSC_VER >= 1800 -auto when_all(_Iterator _Begin, _Iterator _End, const task_options& _TaskOptions = task_options()) --> decltype (details::_WhenAllImpl::value_type::result_type, _Iterator>::_Perform(_TaskOptions, _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAllImpl<_ElementType, _Iterator>::_Perform(_TaskOptions, _Begin, _End); -} -#else -auto when_all(_Iterator _Begin, _Iterator _End, Concurrency::cancellation_token _CancellationToken) --> decltype (details::_WhenAllImpl::value_type::result_type, _Iterator>::_Perform(_CancellationToken._GetImplValue(), _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAllImpl<_ElementType, _Iterator>::_Perform(_CancellationToken._GetImplValue(), _Begin, _End); -} -#endif - -/// -/// Creates a task that will complete successfully when both of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes successfully when both of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// To allow for a construct of the sort taskA && taskB && taskC, which are combined in pairs, the && operator -/// produces a task<std::vector<T>> if either one or both of the tasks are of type task<std::vector<T>>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator&&(const task<_ReturnType> & _Lhs, const task<_ReturnType> & _Rhs) -{ - task<_ReturnType> _PTasks[2] = { _Lhs, _Rhs }; - return when_all(_PTasks, _PTasks + 2); -} - -/// -/// Creates a task that will complete successfully when both of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes successfully when both of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// To allow for a construct of the sort taskA && taskB && taskC, which are combined in pairs, the && operator -/// produces a task<std::vector<T>> if either one or both of the tasks are of type task<std::vector<T>>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator&&(const task> & _Lhs, const task<_ReturnType> & _Rhs) -{ - return details::_WhenAllVectorAndValue(_Lhs, _Rhs, true); -} - -/// -/// Creates a task that will complete successfully when both of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes successfully when both of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// To allow for a construct of the sort taskA && taskB && taskC, which are combined in pairs, the && operator -/// produces a task<std::vector<T>> if either one or both of the tasks are of type task<std::vector<T>>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator&&(const task<_ReturnType> & _Lhs, const task> & _Rhs) -{ - return details::_WhenAllVectorAndValue(_Rhs, _Lhs, false); -} - -/// -/// Creates a task that will complete successfully when both of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes successfully when both of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// To allow for a construct of the sort taskA && taskB && taskC, which are combined in pairs, the && operator -/// produces a task<std::vector<T>> if either one or both of the tasks are of type task<std::vector<T>>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator&&(const task> & _Lhs, const task> & _Rhs) -{ - task> _PTasks[2] = { _Lhs, _Rhs }; - return when_all(_PTasks, _PTasks + 2); -} - -/// -/// Creates a task that will complete successfully when both of the tasks supplied as arguments complete successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes successfully when both of the input tasks have completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>>. If the input tasks are of type void the output -/// task will also be a task<void>. -/// To allow for a construct of the sort taskA && taskB && taskC, which are combined in pairs, the && operator -/// produces a task<std::vector<T>> if either one or both of the tasks are of type task<std::vector<T>>. -/// -/// -/// If one of the tasks is canceled or throws an exception, the returned task will complete early, in the canceled state, and the exception, -/// if one is encoutered, will be thrown if you call get() or wait() on that task. -/// -/// -/**/ -inline task operator&&(const task & _Lhs, const task & _Rhs) -{ - task _PTasks[2] = { _Lhs, _Rhs }; - return when_all(_PTasks, _PTasks + 2); -} - -namespace details -{ - // Helper struct for when_any operators to know when tasks have completed - template - struct _RunAnyParam - { - _RunAnyParam() : _M_completeCount(0), _M_numTasks(0), _M_exceptionRelatedToken(nullptr), _M_fHasExplicitToken(false) - { - } - ~_RunAnyParam() - { - if (Concurrency::details::_CancellationTokenState::_IsValid(_M_exceptionRelatedToken)) - _M_exceptionRelatedToken->_Release(); - } - task_completion_event<_CompletionType> _M_Completed; - Concurrency::cancellation_token_source _M_cancellationSource; - Concurrency::details::_CancellationTokenState* _M_exceptionRelatedToken; - atomic_size_t _M_completeCount; - size_t _M_numTasks; - bool _M_fHasExplicitToken; - }; - - template - void _WhenAnyContinuationWrapper(_RunAnyParam<_CompletionType> * _PParam, const _Function & _Func, task<_TaskType>& _Task) - { - bool _IsTokenCancled = !_PParam->_M_fHasExplicitToken && _Task._GetImpl()->_M_pTokenState != Concurrency::details::_CancellationTokenState::_None() && _Task._GetImpl()->_M_pTokenState->_IsCanceled(); - if (_Task._GetImpl()->_IsCompleted() && !_IsTokenCancled) - { - _Func(); -#if _MSC_VER >= 1800 - if (Concurrency::details::atomic_increment(_PParam->_M_completeCount) == _PParam->_M_numTasks) -#else - if (_InterlockedIncrementSizeT(&_PParam->_M_completeCount) == _PParam->_M_numTasks) -#endif - { - delete _PParam; - } - } - else - { - _CONCRT_ASSERT(_Task._GetImpl()->_IsCanceled() || _IsTokenCancled); - if (_Task._GetImpl()->_HasUserException() && !_IsTokenCancled) - { - if (_PParam->_M_Completed._StoreException(_Task._GetImpl()->_GetExceptionHolder())) - { - // This can only enter once. - _PParam->_M_exceptionRelatedToken = _Task._GetImpl()->_M_pTokenState; - _CONCRT_ASSERT(_PParam->_M_exceptionRelatedToken); - // Deref token will be done in the _PParam destructor. - if (_PParam->_M_exceptionRelatedToken != Concurrency::details::_CancellationTokenState::_None()) - { - _PParam->_M_exceptionRelatedToken->_Reference(); - } - } - } - -#if _MSC_VER >= 1800 - if (Concurrency::details::atomic_increment(_PParam->_M_completeCount) == _PParam->_M_numTasks) -#else - if (_InterlockedIncrementSizeT(&_PParam->_M_completeCount) == _PParam->_M_numTasks) -#endif - { - // If no one has be completed so far, we need to make some final cancellation decision. - if (!_PParam->_M_Completed._IsTriggered()) - { - // If we already explicit token, we can skip the token join part. - if (!_PParam->_M_fHasExplicitToken) - { - if (_PParam->_M_exceptionRelatedToken) - { - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _PParam->_M_exceptionRelatedToken); - } - else - { - // If haven't captured any exception token yet, there was no exception for all those tasks, - // so just pick a random token (current one) for normal cancellation. - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _Task._GetImpl()->_M_pTokenState); - } - } - // Do exception cancellation or normal cancellation based on whether it has stored exception. - _PParam->_M_Completed._Cancel(); - } - delete _PParam; - } - } - } - - template - struct _WhenAnyImpl - { -#if _MSC_VER >= 1800 - static task> _Perform(const task_options& _TaskOptions, _Iterator _Begin, _Iterator _End) -#else - static task> _Perform(Concurrency::details::_CancellationTokenState *_PTokenState, _Iterator _Begin, _Iterator _End) -#endif - { - if (_Begin == _End) - { - throw Concurrency::invalid_operation("when_any(begin, end) cannot be called on an empty container."); - } -#if _MSC_VER >= 1800 - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; -#endif - auto _PParam = new _RunAnyParam, Concurrency::details::_CancellationTokenState *>>(); - - if (_PTokenState) - { - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _PTokenState); - _PParam->_M_fHasExplicitToken = true; - } -#if _MSC_VER >= 1800 - task_options _Options(_TaskOptions); - _Options.set_cancellation_token(_PParam->_M_cancellationSource.get_token()); - task, Concurrency::details::_CancellationTokenState *>> _Any_tasks_completed(_PParam->_M_Completed, _Options); -#else - task, Concurrency::details::_CancellationTokenState *>> _Any_tasks_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); - _Any_tasks_completed._GetImpl()->_M_fRuntimeAggregate = true; -#endif - // Keep a copy ref to the token source - auto _CancellationSource = _PParam->_M_cancellationSource; - - _PParam->_M_numTasks = static_cast(std::distance(_Begin, _End)); - size_t index = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - if (_PTask->is_apartment_aware()) - { - _Any_tasks_completed._SetAsync(); - } - - _PTask->_Then([_PParam, index](task<_ElementType> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - auto _PParamCopy = _PParam; // Dev10 - auto _IndexCopy = index; // Dev10 - auto _Func = [&_ResultTask, _PParamCopy, _IndexCopy]() { - _PParamCopy->_M_Completed.set(std::make_pair(std::make_pair(_ResultTask._GetImpl()->_GetResult(), _IndexCopy), _ResultTask._GetImpl()->_M_pTokenState)); - }; -#else - auto _Func = [&_ResultTask, _PParam, index]() { - _PParam->_M_Completed.set(std::make_pair(std::make_pair(_ResultTask._GetImpl()->_GetResult(), index), _ResultTask._GetImpl()->_M_pTokenState)); - }; -#endif - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - index++; - } - - // All _Any_tasks_completed._SetAsync() must be finished before this return continuation task being created. - return _Any_tasks_completed._Then([=](std::pair, Concurrency::details::_CancellationTokenState *> _Result, std::pair<_ElementType, size_t>* retVal) -> HRESULT { - _CONCRT_ASSERT(_Result.second); - if (!_PTokenState) - { - details::_JoinAllTokens_Add(_CancellationSource, _Result.second); - } - *retVal = _Result.first; - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, true); -#endif - } - }; - - template - struct _WhenAnyImpl - { -#if _MSC_VER >= 1800 - static task _Perform(const task_options& _TaskOptions, _Iterator _Begin, _Iterator _End) -#else - static task _Perform(Concurrency::details::_CancellationTokenState *_PTokenState, _Iterator _Begin, _Iterator _End) -#endif - { - if (_Begin == _End) - { - throw Concurrency::invalid_operation("when_any(begin, end) cannot be called on an empty container."); - } -#if _MSC_VER >= 1800 - Concurrency::details::_CancellationTokenState *_PTokenState = _TaskOptions.has_cancellation_token() ? _TaskOptions.get_cancellation_token()._GetImplValue() : nullptr; -#endif - auto _PParam = new _RunAnyParam>(); - - if (_PTokenState) - { - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _PTokenState); - _PParam->_M_fHasExplicitToken = true; - } - -#if _MSC_VER >= 1800 - task_options _Options(_TaskOptions); - _Options.set_cancellation_token(_PParam->_M_cancellationSource.get_token()); - task> _Any_tasks_completed(_PParam->_M_Completed, _Options); -#else - task> _Any_tasks_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); -#endif - // Keep a copy ref to the token source - auto _CancellationSource = _PParam->_M_cancellationSource; - - _PParam->_M_numTasks = static_cast(std::distance(_Begin, _End)); - size_t index = 0; - for (auto _PTask = _Begin; _PTask != _End; ++_PTask) - { - if (_PTask->is_apartment_aware()) - { - _Any_tasks_completed._SetAsync(); - } - - _PTask->_Then([_PParam, index](task _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - auto _PParamCopy = _PParam; // Dev10 - auto _IndexCopy = index; // Dev10 - auto _Func = [&_ResultTask, _PParamCopy, _IndexCopy]() { - _PParamCopy->_M_Completed.set(std::make_pair(_IndexCopy, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#else - auto _Func = [&_ResultTask, _PParam, index]() { - _PParam->_M_Completed.set(std::make_pair(index, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#endif - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - - index++; - } - - // All _Any_tasks_completed._SetAsync() must be finished before this return continuation task being created. - return _Any_tasks_completed._Then([=](std::pair _Result, size_t* retVal) -> HRESULT { - _CONCRT_ASSERT(_Result.second); - if (!_PTokenState) - { - details::_JoinAllTokens_Add(_CancellationSource, _Result.second); - } - *retVal = _Result.first; - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, false); -#endif - } - }; -} // namespace details - -/// -/// Creates a task that will complete successfully when any of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the input iterator. -/// -/// -/// The position of the first element in the range of elements to be combined into the resulting task. -/// -/// -/// The position of the first element beyond the range of elements to be combined into the resulting task. -/// -/// -/// A task that completes successfully when any one of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::pair<T, size_t>>>, where the first element of the pair is the result -/// of the completing task, and the second element is the index of the task that finished. If the input tasks are of type void -/// the output is a task<size_t>, where the result is the index of the completing task. -/// -/// -/**/ -template -#if _MSC_VER >= 1800 -auto when_any(_Iterator _Begin, _Iterator _End, const task_options& _TaskOptions = task_options()) --> decltype (details::_WhenAnyImpl::value_type::result_type, _Iterator>::_Perform(_TaskOptions, _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAnyImpl<_ElementType, _Iterator>::_Perform(_TaskOptions, _Begin, _End); -} -#else -auto when_any(_Iterator _Begin, _Iterator _End) --> decltype (details::_WhenAnyImpl::value_type::result_type, _Iterator>::_Perform(nullptr, _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAnyImpl<_ElementType, _Iterator>::_Perform(nullptr, _Begin, _End); -} -#endif - -/// -/// Creates a task that will complete successfully when any of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the input iterator. -/// -/// -/// The position of the first element in the range of elements to be combined into the resulting task. -/// -/// -/// The position of the first element beyond the range of elements to be combined into the resulting task. -/// -/// -/// The cancellation token which controls cancellation of the returned task. If you do not provide a cancellation token, the resulting -/// task will receive the cancellation token of the task that causes it to complete. -/// -/// -/// A task that completes successfully when any one of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::pair<T, size_t>>>, where the first element of the pair is the result -/// of the completing task, and the second element is the index of the task that finished. If the input tasks are of type void -/// the output is a task<size_t>, where the result is the index of the completing task. -/// -/// -/**/ -template -auto when_any(_Iterator _Begin, _Iterator _End, Concurrency::cancellation_token _CancellationToken) --> decltype (details::_WhenAnyImpl::value_type::result_type, _Iterator>::_Perform(_CancellationToken._GetImplValue(), _Begin, _End)) -{ - typedef typename std::iterator_traits<_Iterator>::value_type::result_type _ElementType; - return details::_WhenAnyImpl<_ElementType, _Iterator>::_Perform(_CancellationToken._GetImplValue(), _Begin, _End); -} - -/// -/// Creates a task that will complete successfully when either of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes sucessfully when either of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>. If the input tasks are of type void the output task -/// will also be a task<void>. -/// To allow for a construct of the sort taskA || taskB && taskC, which are combined in pairs, with && taking precedence -/// over ||, the operator|| produces a task<std::vector<T>> if one of the tasks is of type task<std::vector<T>> -/// and the other one is of type task<T>. -/// -/// -/// If both of the tasks are canceled or throw exceptions, the returned task will complete in the canceled state, and one of the exceptions, -/// if any are encountered, will be thrown when you call get() or wait() on that task. -/// -/// -/**/ -template -task<_ReturnType> operator||(const task<_ReturnType> & _Lhs, const task<_ReturnType> & _Rhs) -{ -#if _MSC_VER >= 1800 - auto _PParam = new details::_RunAnyParam>(); - - task> _Any_tasks_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); - // Chain the return continuation task here to ensure it will get inline execution when _M_Completed.set is called, - // So that _PParam can be used before it getting deleted. - auto _ReturnTask = _Any_tasks_completed._Then([=](std::pair<_ReturnType, size_t> _Ret, _ReturnType* retVal) -> HRESULT { - _CONCRT_ASSERT(_Ret.second); - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, reinterpret_cast(_Ret.second)); - *retVal = _Ret.first; - return S_OK; - }, nullptr); -#else - auto _PParam = new details::_RunAnyParam>(); - - task> _Any_tasks_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); - // Chain the return continuation task here to ensure it will get inline execution when _M_Completed.set is called, - // So that _PParam can be used before it getting deleted. - auto _ReturnTask = _Any_tasks_completed._Then([=](std::pair<_ReturnType, Concurrency::details::_CancellationTokenState *> _Ret, _ReturnType* retVal) -> HRESULT { - _CONCRT_ASSERT(_Ret.second); - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _Ret.second); - *retVal = _Ret.first; - return S_OK; - }, nullptr, false); -#endif - if (_Lhs.is_apartment_aware() || _Rhs.is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PParam->_M_numTasks = 2; - auto _Continuation = [_PParam](task<_ReturnType> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - auto _PParamCopy = _PParam; - auto _Func = [&_ResultTask, _PParamCopy]() { - _PParamCopy->_M_Completed.set(std::make_pair(_ResultTask._GetImpl()->_GetResult(), reinterpret_cast(_ResultTask._GetImpl()->_M_pTokenState))); - }; -#else - auto _Func = [&_ResultTask, _PParam]() { - _PParam->_M_Completed.set(std::make_pair(_ResultTask._GetImpl()->_GetResult(), _ResultTask._GetImpl()->_M_pTokenState)); - }; -#endif - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; - }; - -#if _MSC_VER >= 1800 - _Lhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None()); - _Rhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None()); -#else - _Lhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None(), false); - _Rhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - return _ReturnTask; -} - -/// -/// Creates a task that will complete successfully when any of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes sucessfully when either of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>. If the input tasks are of type void the output task -/// will also be a task<void>. -/// To allow for a construct of the sort taskA || taskB && taskC, which are combined in pairs, with && taking precedence -/// over ||, the operator|| produces a task<std::vector<T>> if one of the tasks is of type task<std::vector<T>> -/// and the other one is of type task<T>. -/// -/// -/// If both of the tasks are canceled or throw exceptions, the returned task will complete in the canceled state, and one of the exceptions, -/// if any are encountered, will be thrown when you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator||(const task> & _Lhs, const task<_ReturnType> & _Rhs) -{ - auto _PParam = new details::_RunAnyParam, Concurrency::details::_CancellationTokenState *>>(); - - task, Concurrency::details::_CancellationTokenState *>> _Any_tasks_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); -#if _MSC_VER < 1800 - _Any_tasks_completed._GetImpl()->_M_fRuntimeAggregate = true; -#endif - // Chain the return continuation task here to ensure it will get inline execution when _M_Completed.set is called, - // So that _PParam can be used before it getting deleted. - auto _ReturnTask = _Any_tasks_completed._Then([=](std::pair, Concurrency::details::_CancellationTokenState *> _Ret, std::vector<_ReturnType>* retVal) -> HRESULT { - _CONCRT_ASSERT(_Ret.second); - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _Ret.second); - *retVal = _Ret.first; - return S_OK; - }, nullptr, true); - - if (_Lhs.is_apartment_aware() || _Rhs.is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PParam->_M_numTasks = 2; - _Lhs._Then([_PParam](task> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - auto _PParamCopy = _PParam; - auto _Func = [&_ResultTask, _PParamCopy]() { - auto _Result = _ResultTask._GetImpl()->_GetResult(); - _PParamCopy->_M_Completed.set(std::make_pair(_Result, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#else - auto _Func = [&_ResultTask, _PParam]() { - std::vector<_ReturnType> _Result = _ResultTask._GetImpl()->_GetResult(); - _PParam->_M_Completed.set(std::make_pair(_Result, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#endif - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - _Rhs._Then([_PParam](task<_ReturnType> _ResultTask) -> HRESULT { -#if _MSC_VER >= 1800 - // Dev10 compiler bug - typedef _ReturnType _ReturnTypeDev10; - auto _PParamCopy = _PParam; - auto _Func = [&_ResultTask, _PParamCopy]() { - auto _Result = _ResultTask._GetImpl()->_GetResult(); - - std::vector<_ReturnTypeDev10> _Vec; - _Vec.push_back(_Result); - _PParamCopy->_M_Completed.set(std::make_pair(_Vec, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#else - auto _Func = [&_ResultTask, _PParam]() { - _ReturnType _Result = _ResultTask._GetImpl()->_GetResult(); - - std::vector<_ReturnType> _Vec; - _Vec.push_back(_Result); - _PParam->_M_Completed.set(std::make_pair(_Vec, _ResultTask._GetImpl()->_M_pTokenState)); - }; -#endif - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; -#if _MSC_VER >= 1800 - }, Concurrency::details::_CancellationTokenState::_None()); -#else - }, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - return _ReturnTask; -} - -/// -/// Creates a task that will complete successfully when any of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes sucessfully when either of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>. If the input tasks are of type void the output task -/// will also be a task<void>. -/// To allow for a construct of the sort taskA || taskB && taskC, which are combined in pairs, with && taking precedence -/// over ||, the operator|| produces a task<std::vector<T>> if one of the tasks is of type task<std::vector<T>> -/// and the other one is of type task<T>. -/// -/// -/// If both of the tasks are canceled or throw exceptions, the returned task will complete in the canceled state, and one of the exceptions, -/// if any are encountered, will be thrown when you call get() or wait() on that task. -/// -/// -/**/ -template -task> operator||(const task<_ReturnType> & _Lhs, const task> & _Rhs) -{ - return _Rhs || _Lhs; -} - -/// -/// Creates a task that will complete successfully when any of the tasks supplied as arguments completes successfully. -/// -/// -/// The type of the returned task. -/// -/// -/// The first task to combine into the resulting task. -/// -/// -/// The second task to combine into the resulting task. -/// -/// -/// A task that completes sucessfully when either of the input tasks has completed successfully. If the input tasks are of type T, -/// the output of this function will be a task<std::vector<T>. If the input tasks are of type void the output task -/// will also be a task<void>. -/// To allow for a construct of the sort taskA || taskB && taskC, which are combined in pairs, with && taking precedence -/// over ||, the operator|| produces a task<std::vector<T>> if one of the tasks is of type task<std::vector<T>> -/// and the other one is of type task<T>. -/// -/// -/// If both of the tasks are canceled or throw exceptions, the returned task will complete in the canceled state, and one of the exceptions, -/// if any are encountered, will be thrown when you call get() or wait() on that task. -/// -/// -/**/ -inline task operator||(const task & _Lhs, const task & _Rhs) -{ - auto _PParam = new details::_RunAnyParam>(); - - task> _Any_task_completed(_PParam->_M_Completed, _PParam->_M_cancellationSource.get_token()); - // Chain the return continuation task here to ensure it will get inline execution when _M_Completed.set is called, - // So that _PParam can be used before it getting deleted. - auto _ReturnTask = _Any_task_completed._Then([=](std::pair _Ret) -> HRESULT { - _CONCRT_ASSERT(_Ret.second); - details::_JoinAllTokens_Add(_PParam->_M_cancellationSource, _Ret.second); - return S_OK; -#if _MSC_VER >= 1800 - }, nullptr); -#else - }, nullptr, false); -#endif - - if (_Lhs.is_apartment_aware() || _Rhs.is_apartment_aware()) - { - _ReturnTask._SetAsync(); - } - - _PParam->_M_numTasks = 2; - auto _Continuation = [_PParam](task _ResultTask) mutable -> HRESULT { - // Dev10 compiler needs this. - auto _PParam1 = _PParam; - auto _Func = [&_ResultTask, _PParam1]() { - _PParam1->_M_Completed.set(std::make_pair(details::_Unit_type(), _ResultTask._GetImpl()->_M_pTokenState)); - }; - _WhenAnyContinuationWrapper(_PParam, _Func, _ResultTask); - return S_OK; - }; - -#if _MSC_VER >= 1800 - _Lhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None()); - _Rhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None()); -#else - _Lhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None(), false); - _Rhs._Then(_Continuation, Concurrency::details::_CancellationTokenState::_None(), false); -#endif - - return _ReturnTask; -} - -#if _MSC_VER >= 1800 -template -task<_Ty> task_from_result(_Ty _Param, const task_options& _TaskOptions = task_options()) -{ - task_completion_event<_Ty> _Tce; - _Tce.set(_Param); - return create_task<_Ty>(_Tce, _TaskOptions); -} - -// Work around VS 2010 compiler bug -#if _MSC_VER == 1600 -inline task task_from_result(bool _Param) -{ - task_completion_event _Tce; - _Tce.set(_Param); - return create_task(_Tce, task_options()); -} -#endif -inline task task_from_result(const task_options& _TaskOptions = task_options()) -{ - task_completion_event _Tce; - _Tce.set(); - return create_task(_Tce, _TaskOptions); -} - -template -task<_TaskType> task_from_exception(_ExType _Exception, const task_options& _TaskOptions = task_options()) -{ - task_completion_event<_TaskType> _Tce; - _Tce.set_exception(_Exception); - return create_task<_TaskType>(_Tce, _TaskOptions); -} - -namespace details -{ - /// - /// A convenient extension to Concurrency: loop until a condition is no longer met - /// - /// - /// A function representing the body of the loop. It will be invoked at least once and - /// then repetitively as long as it returns true. - /// - inline - task do_while(std::function(void)> func) - { - task first = func(); - return first.then([=](bool guard, task* retVal) -> HRESULT { - if (guard) - *retVal = do_while(func); - else - *retVal = first; - return S_OK; - }); - } - -} // namespace details -#endif - -} // namespace Concurrency_winrt - -namespace concurrency_winrt = Concurrency_winrt; - -#pragma pop_macro("new") -#pragma warning(pop) -#pragma pack(pop) -#endif - -#endif diff --git a/modules/highgui/src/window.cpp b/modules/highgui/src/window.cpp index cda019102cd8..d6f35af1cb7e 100644 --- a/modules/highgui/src/window.cpp +++ b/modules/highgui/src/window.cpp @@ -481,11 +481,12 @@ int cv::createButton(const String&, ButtonCallback, void*, int , bool ) #endif -#if defined(HAVE_WIN32UI) // see window_w32.cpp +#if defined (HAVE_WIN32UI) // see window_w32.cpp #elif defined (HAVE_GTK) // see window_gtk.cpp #elif defined (HAVE_COCOA) // see window_carbon.cpp #elif defined (HAVE_CARBON) -#elif defined (HAVE_QT) //YV see window_QT.cpp +#elif defined (HAVE_QT) // see window_QT.cpp +#elif defined (WINRT) && !defined (WINRT_8_0) // see window_winrt.cpp #else diff --git a/modules/highgui/src/window_winrt.cpp b/modules/highgui/src/window_winrt.cpp new file mode 100644 index 000000000000..b87c9611db41 --- /dev/null +++ b/modules/highgui/src/window_winrt.cpp @@ -0,0 +1,438 @@ +#include "precomp.hpp" + +#if defined WINRT && !defined WINRT_8_0 + +#include +#include +#include +#include + +struct CvWindow; + +typedef struct CvTrackbar +{ + int signature; + void* hwnd; // TODO: use proper handle type + char* name; + CvTrackbar* next; + CvWindow* parent; + int* data; + int pos; + int maxval; + void (*notify)(int); + void (*notify2)(int, void*); + void* userdata; + int id; +} +CvTrackbar; + + +typedef struct CvWindow +{ + int signature; + void* hwnd; // TODO: use proper handle type + char* name; + CvWindow* prev; + CvWindow* next; + + HGDIOBJ image; + int flags; + + CvMouseCallback on_mouse; + void* on_mouse_param; + + struct + { + void* toolbar; // TODO: use proper handle type + int pos; + int rows; + CvTrackbar* first; + } + toolbar; + + int width; + int height; +} +CvWindow; + +static CvWindow* hg_windows = 0; + +// typedef int (CV_CDECL * CvWin32WindowCallback)(HWND, UINT, WPARAM, LPARAM, int*); + +static CvWindow* icvFindWindowByName(const char* name) { + CvWindow* window = hg_windows; + + for (; window != 0 && strcmp(name, window->name) != 0; window = window->next) + ; + + return window; +} + +static CvTrackbar* +icvFindTrackbarByName(const CvWindow* window, const char* name) { + CvTrackbar* trackbar = window->toolbar.first; + + for (; trackbar != 0 && strcmp(trackbar->name, name) != 0; trackbar = trackbar->next) + ; + + return trackbar; +} + +CV_IMPL int cvInitSystem( int, char** ) +{ + static int wasInitialized = 0; + + if (!wasInitialized) + { + hg_windows = 0; + } + + return 0; +} + +CV_IMPL int cvStartWindowThread(){ + return 0; +} + +CV_IMPL int cvNamedWindow( const char* name, int flags ) +{ + int result = 0; + CV_FUNCNAME( "cvNamedWindow" ); + + __BEGIN__; + __END__; + + return result; +} + +CV_IMPL void cvDestroyWindow( const char* name ) +{ + CV_FUNCNAME( "cvDestroyWindow" ); + + __BEGIN__; + + CvWindow* window; + + if(!name) + CV_ERROR( CV_StsNullPtr, "NULL name string" ); + + window = icvFindWindowByName(name); + if( !window ) + EXIT; + + __END__; +} + +CV_IMPL void cvShowImage( const char* name, const CvArr* arr ) +{ + CV_FUNCNAME( "cvShowImage" ); + + __BEGIN__; + + CvWindow* window; + SIZE size = { 0, 0 }; + int channels = 0; + void* dst_ptr = 0; + const int channels_def = 3; + int origin = 0; + CvMat stub, dst, *image; + bool changed_size = false; + + if( !name ) + CV_ERROR( CV_StsNullPtr, "NULL name" ); + + window = icvFindWindowByName(name); + if(!window) + { + cvNamedWindow(name, CV_WINDOW_AUTOSIZE); + window = icvFindWindowByName(name); + } + + if( !window || !arr ) + EXIT; + + if( CV_IS_IMAGE_HDR( arr )) + origin = ((IplImage*)arr)->origin; + + CV_CALL( image = cvGetMat( arr, &stub )); + +#ifdef HAVE_OPENGL + if (window->useGl) + { + cv::imshow(name, cv::cvarrToMat(image)); + return; + } +#endif + + if (window->image) + { + //TODO: validate image + } + + if (size.cx != image->width || size.cy != image->height || channels != channels_def) + { + changed_size = true; + + //TODO: handle image resize + } + + cvInitMatHeader( &dst, size.cy, size.cx, CV_8UC3, + dst_ptr, (size.cx * channels + 3) & -4 ); + cvConvertImage( image, &dst, origin == 0 ? CV_CVTIMG_FLIP : 0 ); + + if (changed_size) + //TODO: handle consequent image resize + + __END__; +} + +CV_IMPL void cvResizeWindow(const char* name, int width, int height ) +{ + CV_FUNCNAME( "cvResizeWindow" ); + + __BEGIN__; + + CvWindow* window; + + if( !name ) + CV_ERROR( CV_StsNullPtr, "NULL name" ); + + window = icvFindWindowByName(name); + if(!window) + EXIT; + + // TODO: implement appropriate logic here + + __END__; +} + + +CV_IMPL void cvMoveWindow( const char* name, int x, int y ) +{ + CV_FUNCNAME( "cvMoveWindow" ); + + __BEGIN__; + + CvWindow* window; + RECT rect; + + if( !name ) + CV_ERROR( CV_StsNullPtr, "NULL name" ); + + window = icvFindWindowByName(name); + if(!window) + EXIT; + + // TODO: implement appropriate logic here + + __END__; +} + + + +CV_IMPL void cvDestroyAllWindows(void) +{ + // TODO: implement appropriate logic here +} + +CV_IMPL int cvWaitKey( int delay ) +{ + // see https://msdn.microsoft.com/en-us/library/windows/desktop/ms724411(v=vs.85).aspx + int time0 = GetTickCount64(); + + for(;;) + { + CvWindow* window; + + if ((delay > 0 && abs((int)(GetTickCount64() - time0)) >= delay) || hg_windows == 0) + return -1; + + if (delay <= 0) + { + // TODO: implement appropriate logic here + } + + for( window = hg_windows; window != 0; window = window->next ) + { + } + } +} + + + +CV_IMPL int +cvCreateTrackbar( const char* trackbar_name, const char* window_name, + int* val, int count, CvTrackbarCallback on_notify ) +{ + // TODO: implement appropriate logic here + return 0; +} + +CV_IMPL int +cvCreateTrackbar2( const char* trackbar_name, const char* window_name, + int* val, int count, CvTrackbarCallback2 on_notify2, + void* userdata ) +{ + // TODO: implement appropriate logic here + return 0; +} + +CV_IMPL void +cvSetMouseCallback( const char* window_name, CvMouseCallback on_mouse, void* param ) +{ + CV_FUNCNAME( "cvSetMouseCallback" ); + + __BEGIN__; + + CvWindow* window = 0; + + if( !window_name ) + CV_ERROR( CV_StsNullPtr, "NULL window name" ); + + window = icvFindWindowByName(window_name); + if( !window ) + EXIT; + + // TODO: implement appropriate logic here + + __END__; +} + + +CV_IMPL int cvGetTrackbarPos( const char* trackbar_name, const char* window_name ) +{ + int pos = -1; + + CV_FUNCNAME( "cvGetTrackbarPos" ); + + __BEGIN__; + + CvWindow* window; + CvTrackbar* trackbar = 0; + + if( trackbar_name == 0 || window_name == 0 ) + CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" ); + + window = icvFindWindowByName( window_name ); + if( window ) + trackbar = icvFindTrackbarByName( window, trackbar_name ); + + if( trackbar ) + pos = trackbar->pos; + + __END__; + + return pos; +} + + +CV_IMPL void cvSetTrackbarPos( const char* trackbar_name, const char* window_name, int pos ) +{ + CV_FUNCNAME( "cvSetTrackbarPos" ); + + __BEGIN__; + + CvWindow* window; + CvTrackbar* trackbar = 0; + + if( trackbar_name == 0 || window_name == 0 ) + CV_ERROR( CV_StsNullPtr, "NULL trackbar or window name" ); + + window = icvFindWindowByName( window_name ); + if( window ) + trackbar = icvFindTrackbarByName( window, trackbar_name ); + + if( trackbar ) + { + if( pos < 0 ) + pos = 0; + + if( pos > trackbar->maxval ) + pos = trackbar->maxval; + + //TODO: update trackbar + } + + __END__; +} + + +CV_IMPL void cvSetTrackbarMax(const char* trackbar_name, const char* window_name, int maxval) +{ + CV_FUNCNAME( "cvSetTrackbarMax" ); + + __BEGIN__; + + if (maxval >= 0) + { + CvWindow* window = 0; + CvTrackbar* trackbar = 0; + if (trackbar_name == 0 || window_name == 0) + { + CV_ERROR(CV_StsNullPtr, "NULL trackbar or window name"); + } + + window = icvFindWindowByName(window_name); + if (window) + { + trackbar = icvFindTrackbarByName(window, trackbar_name); + if (trackbar) + { + // The position will be min(pos, maxval). + trackbar->maxval = maxval; + + //TODO: update trackbar + } + } + } + + __END__; +} + + +CV_IMPL void* cvGetWindowHandle( const char* window_name ) +{ + void* hwnd = 0; + + CV_FUNCNAME( "cvGetWindowHandle" ); + + __BEGIN__; + + CvWindow* window; + + if( window_name == 0 ) + CV_ERROR( CV_StsNullPtr, "NULL window name" ); + + window = icvFindWindowByName( window_name ); + if( window ) + hwnd = (void*)window->hwnd; + + __END__; + + return hwnd; +} + + +CV_IMPL const char* cvGetWindowName( void* window_handle ) +{ + const char* window_name = ""; + + CV_FUNCNAME( "cvGetWindowName" ); + + __BEGIN__; + + CvWindow* window = 0; + + if( window_handle == 0 ) + CV_ERROR( CV_StsNullPtr, "NULL window" ); + + // window = TODO: find window by handle + if( window ) + window_name = window->name; + + __END__; + + return 0; +} + +#endif //defined WINRT && !defined WINRT_8_0 \ No newline at end of file