ComposerService.h revision 6652b3edcb7ef5402c05db12f477ceb23c27d6ec
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 27namespace android { 28 29// --------------------------------------------------------------------------- 30 31class IMemoryHeap; 32class 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.) 42class 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>; 52public: 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