66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_SYNCHRONOUSTASK_H
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#define MOZILLA_GFX_SYNCHRONOUSTASK_H
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#include "mozilla/ReentrantMonitor.h" // for ReentrantMonitor, etc
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namespace mozilla {
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namespace layers {
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// Helper that creates a monitor and a "done" flag, then enters the monitor.
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// This can go away when we switch ImageBridge to an XPCOM thread.
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class MOZ_STACK_CLASS SynchronousTask
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{
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friend class AutoCompleteTask;
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public:
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explicit SynchronousTask(const char* name)
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: mMonitor(name),
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mAutoEnter(mMonitor),
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mDone(false)
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{}
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void Wait() {
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while (!mDone) {
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mMonitor.Wait();
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}
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}
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private:
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void Complete() {
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mDone = true;
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mMonitor.NotifyAll();
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}
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private:
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ReentrantMonitor mMonitor;
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ReentrantMonitorAutoEnter mAutoEnter;
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bool mDone;
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};
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class MOZ_STACK_CLASS AutoCompleteTask
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{
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public:
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explicit AutoCompleteTask(SynchronousTask* aTask)
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: mTask(aTask),
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mAutoEnter(aTask->mMonitor)
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{
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}
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~AutoCompleteTask() {
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mTask->Complete();
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}
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private:
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SynchronousTask* mTask;
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ReentrantMonitorAutoEnter mAutoEnter;
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};
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}
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}
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#endif
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