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/*
* 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 <utils/Condition.h>
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 close() {
Mutex::Autolock l(mLock);
mOpened = false;
}
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
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