/*

 * Copyright (C) 2007 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 COMPUTER, INC. ``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 COMPUTER, INC. OR

 * 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 "config.h"

#include "GCController.h"

#include "JSDOMWindow.h"

#include <runtime/JSGlobalData.h>

#include <runtime/JSLock.h>

#include <runtime/Collector.h>

#include <wtf/StdLibExtras.h>

#if USE(PTHREADS)

#include <pthread.h>

#endif

using namespace JSC;

namespace WebCore {

static void* collect(void*)

{

    JSLock lock(SilenceAssertionsOnly);

    JSDOMWindow::commonJSGlobalData()->heap.collectAllGarbage();

    return 0;

}

GCController& gcController()

{

    DEFINE_STATIC_LOCAL(GCController, staticGCController, ());

    return staticGCController;

}

GCController::GCController()

    : m_GCTimer(this, &GCController::gcTimerFired)

{

}

void GCController::garbageCollectSoon()

{

    if (!m_GCTimer.isActive())

        m_GCTimer.startOneShot(0);

}

void GCController::gcTimerFired(Timer<GCController>*)

{

    collect(0);

}

void GCController::garbageCollectNow()

{

    JSLock lock(SilenceAssertionsOnly);

    if (!JSDOMWindow::commonJSGlobalData()->heap.isBusy())

        collect(0);

}

void GCController::garbageCollectOnAlternateThreadForDebugging(bool waitUntilDone)

{

#if USE(PTHREADS)

    pthread_t thread;

    pthread_create(&thread, NULL, collect, NULL);

    if (waitUntilDone)

        pthread_join(thread, NULL);

#endif

}

} // namespace WebCore