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 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.) 41class 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>; 51public: 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