/*

 * Copyright (C) 2010 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "RunLoop.h"

#include "WorkItem.h"

#include <wtf/StdLibExtras.h>

static RunLoop* s_mainRunLoop;

void RunLoop::initializeMainRunLoop()

{

    if (s_mainRunLoop)

        return;

    s_mainRunLoop = RunLoop::current();

}

RunLoop* RunLoop::current()

{

    DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<RunLoop>, runLoopData, ());

    return &*runLoopData;

}

RunLoop* RunLoop::main()

{

    ASSERT(s_mainRunLoop);

    return s_mainRunLoop;

}

void RunLoop::performWork()

{

    Vector<WorkItem*> workItemQueue;

    {

        MutexLocker locker(m_workItemQueueLock);

        m_workItemQueue.swap(workItemQueue);

    }

    for (size_t i = 0; i < workItemQueue.size(); ++i) {

        OwnPtr<WorkItem> item(workItemQueue[i]);

        item->execute();

    }

}

void RunLoop::scheduleWork(PassOwnPtr<WorkItem> item)

{

    MutexLocker locker(m_workItemQueueLock);

    m_workItemQueue.append(item.leakPtr());

    wakeUp();

}