59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
/*
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* Copyright (C) 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_HWUI_FUTURE_H
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#define ANDROID_HWUI_FUTURE_H
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#include <utils/RefBase.h>
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#include "Barrier.h"
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namespace android {
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namespace uirenderer {
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template<class T>
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class Future: public LightRefBase<Future<T> > {
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public:
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Future(Condition::WakeUpType type = Condition::WAKE_UP_ONE): mBarrier(type), mResult() { }
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~Future() { }
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/**
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* Returns the result of this future, blocking if
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* the result is not available yet.
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*/
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T get() const {
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mBarrier.wait();
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return mResult;
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}
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/**
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* This method must be called only once.
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*/
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void produce(T result) {
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mResult = result;
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mBarrier.open();
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}
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private:
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Barrier mBarrier;
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T mResult;
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};
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_FUTURE_H
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