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 IMemoryHeap; 32 class ISurfaceComposer; 33 34 // --------------------------------------------------------------------------- 35 36 // This holds our connection to the composer service (i.e. SurfaceFlinger). 37 // If the remote side goes away, we will re-establish the connection. 38 // Users of this class should not retain the value from 39 // getComposerService() for an extended period. 40 // 41 // (It's not clear that using Singleton is useful here anymore.) 42 class ComposerService : public Singleton<ComposerService> 43 { 44 sp<ISurfaceComposer> mComposerService; 45 sp<IBinder::DeathRecipient> mDeathObserver; 46 Mutex mLock; 47 48 ComposerService(); 49 void connectLocked(); 50 void composerServiceDied(); 51 friend class Singleton<ComposerService>; 52 public: 53 54 // Get a connection to the Composer Service. This will block until 55 // a connection is established. 56 static sp<ISurfaceComposer> getComposerService(); 57 }; 58 59 // --------------------------------------------------------------------------- 60 }; // namespace android 61 62 #endif // ANDROID_PRIVATE_GUI_COMPOSER_SERVICE_H 63