added BinderService<> template to help creating native binder services

Change-Id: Id980899d2647b56479f8a27c89eaa949f9209dfe

cmds/surfaceflinger/main_surfaceflinger.cpp

@@ -1,18 +1,25 @@
-#include <binder/IPCThreadState.h>
-#include <binder/ProcessState.h>
-#include <binder/IServiceManager.h>
-#include <utils/Log.h>
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
+#include <binder/BinderService.h>
 #include <SurfaceFlinger.h>
 
 using namespace android;
 
-int main(int argc, char** argv)
-{
-    sp<ProcessState> proc(ProcessState::self());
-    sp<IServiceManager> sm = defaultServiceManager();
-    LOGI("ServiceManager: %p", sm.get());
-    SurfaceFlinger::instantiate();
-    ProcessState::self()->startThreadPool();
-    IPCThreadState::self()->joinThreadPool();
+int main(int argc, char** argv) {
+    SurfaceFlinger::publishAndJoinThreadPool();
+    return 0;
 }

include/binder/BinderService.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_BINDER_SERVICE_H
+#define ANDROID_BINDER_SERVICE_H
+
+#include <stdint.h>
+
+#include <utils/Errors.h>
+#include <utils/String16.h>
+
+#include <binder/IServiceManager.h>
+#include <binder/IPCThreadState.h>
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+
+// ---------------------------------------------------------------------------
+namespace android {
+
+template<typename SERVICE>
+class BinderService
+{
+public:
+    static status_t publish() {
+        sp<IServiceManager> sm(defaultServiceManager());
+        return sm->addService(String16(SERVICE::getServiceName()), new SERVICE());
+    }
+
+    static void publishAndJoinThreadPool() {
+        sp<ProcessState> proc(ProcessState::self());
+        sp<IServiceManager> sm(defaultServiceManager());
+        sm->addService(String16(SERVICE::getServiceName()), new SERVICE());
+        ProcessState::self()->startThreadPool();
+        IPCThreadState::self()->joinThreadPool();
+    }
+
+    static void instantiate() { publish(); }
+
+    static status_t shutdown() {
+        return NO_ERROR;
+    }
+};
+
+
+}; // namespace android
+// ---------------------------------------------------------------------------
+#endif // ANDROID_BINDER_SERVICE_H

services/surfaceflinger/SurfaceFlinger.cpp

@@ -63,20 +63,6 @@
 #define DISPLAY_COUNT       1
 
 namespace android {
-
-// ---------------------------------------------------------------------------
-
-void SurfaceFlinger::instantiate() {
-    defaultServiceManager()->addService(
-            String16("SurfaceFlinger"), new SurfaceFlinger());
-}
-
-void SurfaceFlinger::shutdown() {
-    // we should unregister here, but not really because
-    // when (if) the service manager goes away, all the services
-    // it has a reference to will leave too.
-}
-
 // ---------------------------------------------------------------------------
 
 SurfaceFlinger::LayerVector::LayerVector(const SurfaceFlinger::LayerVector& rhs)

services/surfaceflinger/SurfaceFlinger.h

@@ -29,6 +29,7 @@
 
 #include <binder/IMemory.h>
 #include <binder/Permission.h>
+#include <binder/BinderService.h>
 
 #include <ui/PixelFormat.h>
 #include <surfaceflinger/ISurfaceComposer.h>
@@ -167,11 +168,13 @@ enum {
     eTraversalNeeded        = 0x02
 };
 
-class SurfaceFlinger : public BnSurfaceComposer, protected Thread
+class SurfaceFlinger :
+        public BinderService<SurfaceFlinger>,
+        public BnSurfaceComposer,
+        protected Thread
 {
 public:
-    static void instantiate();
-    static void shutdown();
+    static char const* getServiceName() { return "SurfaceFlinger"; }
 
                     SurfaceFlinger();
     virtual         ~SurfaceFlinger();