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mykhanimykhani
committedApr 11, 2021
C++17 Threading
Signed-off-by: ykhan <[email protected]>
1 parent c23c4da commit 5a9f753

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‎Threading/.cproject

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<?fileVersion 4.0.0?><cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
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<externalSettings/>
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<configuration artifactName="${ProjName}" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.release" cleanCommand="rm -rf" description="" id="cdt.managedbuild.config.gnu.exe.release.226196580" name="Release" optionalBuildProperties="" parent="cdt.managedbuild.config.gnu.exe.release">
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<toolChain id="cdt.managedbuild.toolchain.gnu.exe.release.2143874536" name="Linux GCC" superClass="cdt.managedbuild.toolchain.gnu.exe.release">
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<builder buildPath="${workspace_loc:/Threading}/Release" id="cdt.managedbuild.target.gnu.builder.exe.release.433648707" keepEnvironmentInBuildfile="false" managedBuildOn="true" name="Gnu Make Builder" superClass="cdt.managedbuild.target.gnu.builder.exe.release"/>
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<tool id="cdt.managedbuild.tool.gnu.cpp.linker.exe.release.1802019644" name="GCC C++ Linker" superClass="cdt.managedbuild.tool.gnu.cpp.linker.exe.release">
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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</scannerConfigBuildInfo>
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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</scannerConfigBuildInfo>
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<scannerConfigBuildInfo instanceId="cdt.managedbuild.config.gnu.exe.release.226196580;cdt.managedbuild.config.gnu.exe.release.226196580.;cdt.managedbuild.tool.gnu.c.compiler.exe.release.1366031107;cdt.managedbuild.tool.gnu.c.compiler.input.744105623">
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<storageModule moduleId="refreshScope" versionNumber="2">
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<configuration configurationName="Debug">
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<resource resourceType="PROJECT" workspacePath="/Threading"/>
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</configuration>
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<resource resourceType="PROJECT" workspacePath="/Threading"/>
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</cproject>

‎Threading/.gitignore

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/Debug/

‎Threading/.project

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>Threading</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
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<triggers>clean,full,incremental,</triggers>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
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<triggers>full,incremental,</triggers>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.cdt.core.cnature</nature>
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<nature>org.eclipse.cdt.core.ccnature</nature>
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<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
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<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
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</natures>
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</projectDescription>

‎Threading/.settings/language.settings.xml

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<project>
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<configuration id="cdt.managedbuild.config.gnu.exe.debug.758897142" name="Debug">
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<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
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<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
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<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
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<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
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<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-491375104338413693" id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
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<language-scope id="org.eclipse.cdt.core.gcc"/>
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<language-scope id="org.eclipse.cdt.core.g++"/>
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</provider>
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</extension>
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</configuration>
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<configuration id="cdt.managedbuild.config.gnu.exe.release.226196580" name="Release">
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<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
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<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
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<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
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<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
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<provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="-491375104338413693" id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
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<language-scope id="org.eclipse.cdt.core.gcc"/>
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<language-scope id="org.eclipse.cdt.core.g++"/>
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</provider>
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</extension>
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</configuration>
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</project>

‎Threading/.settings/org.eclipse.cdt.core.prefs

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doxygen/doxygen_new_line_after_brief=true
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doxygen/doxygen_use_brief_tag=false
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doxygen/doxygen_use_javadoc_tags=true
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doxygen/doxygen_use_pre_tag=false
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doxygen/doxygen_use_structural_commands=false
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eclipse.preferences.version=1

‎Threading/src/main.cpp

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/*
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* main.cpp
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*
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* Created on: 5 Apr 2021
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* Author: ykhan
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*/
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#include <thread>
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#include <mutex>
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#include <iostream>
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#include <future>
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using namespace std;
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std::mutex console;
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void thread_fn(int &counter) {
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for (int i = 0; i < 5; i++) {
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counter++;
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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}
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std::lock_guard<std::mutex> lg { console };
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cout << "Finished thread_fn " << endl;
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}
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struct Callable {
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void operator()(int &counter) {
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for (int i = 0; i < 5; i++) {
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counter++;
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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}
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std::lock_guard<std::mutex> lg { console };
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cout << "Finished Callable object " << endl;
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}
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};
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void thread_concurrency() {
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int counter1 = 100;
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int counter2 = 200;
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int counter3 = 300;
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cout << endl;
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cout << "Executing thread based concurrency test" << endl;
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std::thread t1 { thread_fn, std::ref(counter1) };
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std::thread t2 { Callable { }, std::ref(counter2) };
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std::thread t3 { [](int &counter) {
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for (int i = 0; i < 5; i++) {
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counter++;
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std::this_thread::sleep_for(std::chrono::milliseconds(500));
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}
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std::lock_guard<std::mutex> lg { console };
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cout << "Finished lambda " << endl;
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}, std::ref(counter3) };
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//cout << "Hardware threads: " << t1.hardware_concurrency() << endl;
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// same as
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cout << "Hardware threads: " << std::thread::hardware_concurrency() << endl;
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std::this_thread::sleep_for(std::chrono::milliseconds(4000));
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std::lock_guard<std::mutex> lg { console };
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cout << "In main thread" << "counter1: " << counter1 << ", " << "counter2: "
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<< counter2 << ", " << "counter3: " << counter3 << endl;
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t1.join();
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t2.join();
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t3.join();
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cout << "Finished thread based concurrency test" << endl;
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}
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using namespace std::chrono_literals;
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bool do_work(std::future<bool> start) {
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// wait for the start command
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cout << "Waiting for the start command from main thread" << endl;
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bool go = start.get();
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if (go) {
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cout << "Start command received from main thread" << endl;
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std::this_thread::sleep_for(4s);
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return true;
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}
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return false;
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}
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void task_concurrency() {
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cout << endl;
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cout << "Executing task based concurrency test" << endl;
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std::promise<bool> start;
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std::future<bool> result = std::async(std::launch::async, do_work, start.get_future());
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bool done = false;
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std::this_thread::sleep_for(2s);
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cout << "Main thread sending start command" << endl;
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start.set_value(true);
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cout << "Main thread waiting for the result " << endl;
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if (result.valid())
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done = result.get();
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cout << "async operation result: " << done << endl;
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cout << "Finished task based concurrency test" << endl;
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}
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int main() {
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thread_concurrency();
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task_concurrency();
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}

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