1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H 18 #define ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <utils/Singleton.h> 24 #include <utils/StrongPointer.h> 25 26 27 namespace android { 28 29 // --------------------------------------------------------------------------- 30 31 class ISurfaceComposer; 32 33 // --------------------------------------------------------------------------- 34 35 // This holds our connection to the composer service (i.e. SurfaceFlinger). 36 // If the remote side goes away, we will re-establish the connection. 37 // Users of this class should not retain the value from 38 // getComposerService() for an extended period. 39 // 40 // (It's not clear that using Singleton is useful here anymore.) 41 class ComposerService : public Singleton<ComposerService> 42 { 43 sp<ISurfaceComposer> mComposerService; 44 sp<IBinder::DeathRecipient> mDeathObserver; 45 Mutex mLock; 46 47 ComposerService(); 48 void connectLocked(); 49 void composerServiceDied(); 50 friend class Singleton<ComposerService>; 51 public: 52 53 // Get a connection to the Composer Service. This will block until 54 // a connection is established. 55 static sp<ISurfaceComposer> getComposerService(); 56 }; 57 58 // --------------------------------------------------------------------------- 59 }; // namespace android 60 61 #endif // ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H 62
