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/*
* Copyright 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_DISCONNECT_WAITER_H
#define ANDROID_DISCONNECT_WAITER_H
#include <gui/IConsumerListener.h>
#include <utils/Condition.h>
#include <utils/Mutex.h>
namespace android {
// Note that GLConsumer will lose the notifications
// onBuffersReleased and onFrameAvailable as there is currently
// no way to forward the events. This DisconnectWaiter will not let the
// disconnect finish until finishDisconnect() is called. It will
// also block until a disconnect is called
class DisconnectWaiter : public BnConsumerListener {
public:
DisconnectWaiter () :
mWaitForDisconnect(false),
mPendingFrames(0) {
}
void waitForFrame() {
Mutex::Autolock lock(mMutex);
while (mPendingFrames == 0) {
mFrameCondition.wait(mMutex);
}
mPendingFrames--;
}
virtual void onFrameAvailable() {
Mutex::Autolock lock(mMutex);
mPendingFrames++;
mFrameCondition.signal();
}
virtual void onBuffersReleased() {
Mutex::Autolock lock(mMutex);
while (!mWaitForDisconnect) {
mDisconnectCondition.wait(mMutex);
}
}
virtual void onSidebandStreamChanged() {}
void finishDisconnect() {
Mutex::Autolock lock(mMutex);
mWaitForDisconnect = true;
mDisconnectCondition.signal();
}
private:
Mutex mMutex;
bool mWaitForDisconnect;
Condition mDisconnectCondition;
int mPendingFrames;
Condition mFrameCondition;
};
} // namespace android
#endif
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