N service創建

M之前版本在一個進程中創建media相關所有服務

av/media/mediaserver/main_mediaserver.cpp        

        sp<IServiceManager> sm = defaultServiceManager();
        ALOGI("ServiceManager: %p", sm.get());
        AudioFlinger::instantiate();
        MediaPlayerService::instantiate();
        ResourceManagerService::instantiate();
        CameraService::instantiate();
        AudioPolicyService::instantiate();
        SoundTriggerHwService::instantiate();
        RadioService::instantiate();
        registerExtensions();
        ProcessState::self()->startThreadPool();
        IPCThreadState::self()->joinThreadPool();

N版本將各個服務轉移到不同進程中進行創建

media/audioserver/main_audioserver.cpp:        AudioPolicyService::instantiate();
camera/cameraserver/main_cameraserver.cpp:    CameraService::instantiate();
media/mediaserver/main_mediaserver.cpp:    MediaPlayerService::instantiate();


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