/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_HWUI_BARRIER_H #define ANDROID_HWUI_BARRIER_H #include namespace android { namespace uirenderer { class Barrier { public: Barrier(Condition::WakeUpType type = Condition::WAKE_UP_ALL) : mType(type), mOpened(false) { } ~Barrier() { } void open() { Mutex::Autolock l(mLock); mOpened = true; mCondition.signal(mType); } void wait() const { Mutex::Autolock l(mLock); while (!mOpened) { mCondition.wait(mLock); } } private: Condition::WakeUpType mType; volatile bool mOpened; mutable Mutex mLock; mutable Condition mCondition; }; }; // namespace uirenderer }; // namespace android #endif // ANDROID_HWUI_BARRIER_H