1 /* 2 * Copyright (C) 2013 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_HWUI_BARRIER_H 18 #define ANDROID_HWUI_BARRIER_H 19 20 #include <utils/Condition.h> 21 22 namespace android { 23 namespace uirenderer { 24 25 class Barrier { 26 public: mType(type)27 Barrier(Condition::WakeUpType type = Condition::WAKE_UP_ALL) : mType(type), mOpened(false) { } ~Barrier()28 ~Barrier() { } 29 open()30 void open() { 31 Mutex::Autolock l(mLock); 32 mOpened = true; 33 mCondition.signal(mType); 34 } 35 close()36 void close() { 37 Mutex::Autolock l(mLock); 38 mOpened = false; 39 } 40 wait()41 void wait() const { 42 Mutex::Autolock l(mLock); 43 while (!mOpened) { 44 mCondition.wait(mLock); 45 } 46 } 47 48 private: 49 Condition::WakeUpType mType; 50 volatile bool mOpened; 51 mutable Mutex mLock; 52 mutable Condition mCondition; 53 }; 54 55 }; // namespace uirenderer 56 }; // namespace android 57 58 #endif // ANDROID_HWUI_BARRIER_H 59