/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com 

 * 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 "SharedTimer.h"

#include "SystemTime.h"

#include <wtf/Assertions.h>

#include <glib.h>

namespace WebCore {

static guint sharedTimer;

static void (*sharedTimerFiredFunction)();

void setSharedTimerFiredFunction(void (*f)())

{

    sharedTimerFiredFunction = f;

}

static gboolean timeout_cb(gpointer)

{

    if (sharedTimerFiredFunction)

        sharedTimerFiredFunction();

    return FALSE;

}

void setSharedTimerFireTime(double fireTime)

{

    ASSERT(sharedTimerFiredFunction);

    double interval = fireTime - currentTime();

    guint intervalInMS;

    if (interval < 0)

        intervalInMS = 0;

    else {

        interval *= 1000;

        intervalInMS = (guint)interval;

    }

    stopSharedTimer();

    if (intervalInMS == 0)

        sharedTimer = g_idle_add_full(G_PRIORITY_DEFAULT, timeout_cb, NULL, NULL);

    else

        sharedTimer = g_timeout_add_full(G_PRIORITY_DEFAULT, intervalInMS, timeout_cb, NULL, NULL);

}

void stopSharedTimer()

{

    gboolean s = FALSE;

    if (sharedTimer == 0)

        return;

    s = g_source_remove(sharedTimer);

    ASSERT(s);

    sharedTimer = 0;

}

}