1 /* 2 * Copyright (C) 2015 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 A_WAKELOCK_H_ 18 #define A_WAKELOCK_H_ 19 20 #include <media/stagefright/foundation/ABase.h> 21 #include <android/os/IPowerManager.h> 22 #include <utils/RefBase.h> 23 24 namespace android { 25 26 class AWakeLock : public RefBase { 27 28 public: 29 AWakeLock(); 30 31 // NOTE: acquire and release are not thread safe 32 33 // returns true if wakelock was acquired 34 bool acquire(); 35 void release(bool force = false); 36 37 virtual ~AWakeLock(); 38 39 private: 40 sp<os::IPowerManager> mPowerManager; 41 sp<IBinder> mWakeLockToken; 42 uint32_t mWakeLockCount; 43 44 class PMDeathRecipient : public IBinder::DeathRecipient { 45 public: PMDeathRecipient(AWakeLock * wakeLock)46 explicit PMDeathRecipient(AWakeLock *wakeLock) : mWakeLock(wakeLock) {} ~PMDeathRecipient()47 virtual ~PMDeathRecipient() {} 48 49 // IBinder::DeathRecipient 50 virtual void binderDied(const wp<IBinder> &who); 51 52 private: 53 PMDeathRecipient(const PMDeathRecipient&); 54 PMDeathRecipient& operator= (const PMDeathRecipient&); 55 56 AWakeLock *mWakeLock; 57 }; 58 59 const sp<PMDeathRecipient> mDeathRecipient; 60 61 void clearPowerManager(); 62 63 DISALLOW_EVIL_CONSTRUCTORS(AWakeLock); 64 }; 65 66 } // namespace android 67 68 #endif // A_WAKELOCK_H_ 69