/*
 * Copyright (C) 2007, 2008, 2013 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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#ifndef TaskSynchronizer_h
#define TaskSynchronizer_h

#include "platform/PlatformExport.h"
#include "wtf/Allocator.h"
#include "wtf/Noncopyable.h"
#include "wtf/Threading.h"
#include "wtf/ThreadingPrimitives.h"

namespace blink {

// TaskSynchronizer can be used to wait for task completion.
class PLATFORM_EXPORT TaskSynchronizer {
    DISALLOW_NEW();
    WTF_MAKE_NONCOPYABLE(TaskSynchronizer);
public:
    TaskSynchronizer();

    // Called from a thread that waits for the task completion.
    void waitForTaskCompletion();

    // Called from a thread that executes the task.
    void taskCompleted();

private:
    void waitForTaskCompletionInternal();

    bool m_taskCompleted;
    Mutex m_synchronousMutex;
    ThreadCondition m_synchronousCondition;
};

} // namespace blink

#endif // TaskSynchronizer_h