81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_DISCONNECT_WAITER_H
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#define ANDROID_DISCONNECT_WAITER_H
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#include <gui/IConsumerListener.h>
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#include <utils/Condition.h>
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#include <utils/Mutex.h>
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namespace android {
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// Note that GLConsumer will lose the notifications
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// onBuffersReleased and onFrameAvailable as there is currently
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// no way to forward the events. This DisconnectWaiter will not let the
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// disconnect finish until finishDisconnect() is called. It will
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// also block until a disconnect is called
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class DisconnectWaiter : public BnConsumerListener {
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public:
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DisconnectWaiter () :
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mWaitForDisconnect(false),
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mPendingFrames(0) {
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}
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void waitForFrame() {
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Mutex::Autolock lock(mMutex);
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while (mPendingFrames == 0) {
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mFrameCondition.wait(mMutex);
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}
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mPendingFrames--;
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}
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virtual void onFrameAvailable() {
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Mutex::Autolock lock(mMutex);
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mPendingFrames++;
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mFrameCondition.signal();
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}
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virtual void onBuffersReleased() {
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Mutex::Autolock lock(mMutex);
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while (!mWaitForDisconnect) {
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mDisconnectCondition.wait(mMutex);
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}
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}
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virtual void onSidebandStreamChanged() {}
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void finishDisconnect() {
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Mutex::Autolock lock(mMutex);
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mWaitForDisconnect = true;
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mDisconnectCondition.signal();
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}
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private:
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Mutex mMutex;
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bool mWaitForDisconnect;
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Condition mDisconnectCondition;
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int mPendingFrames;
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Condition mFrameCondition;
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};
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} // namespace android
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#endif
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