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/*
* Copyright (C) 2006 Apple Computer, 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 "SharedTimer.h"
#include "SystemTime.h"
#include "Assertions.h"
#undef LOG
#include "base/message_loop.h"
namespace WebCore {
class WebkitTimerTask;
// We maintain a single active timer and a single active task for
// setting timers directly on the platform.
static WebkitTimerTask* msgLoopTask;
static void (*sharedTimerFiredFunction)();
// Timer task to run in the chrome message loop.
class WebkitTimerTask : public Task {
public:
WebkitTimerTask(void (*callback)()) : m_callback(callback) {}
virtual void Run() {
if (!m_callback)
return;
// Since we only have one task running at a time, verify that it
// is 'this'.
ASSERT(msgLoopTask == this);
msgLoopTask = NULL;
m_callback();
}
void Cancel() {
m_callback = NULL;
}
private:
void (*m_callback)();
DISALLOW_COPY_AND_ASSIGN(WebkitTimerTask);
};
void setSharedTimerFiredFunction(void (*f)())
{
sharedTimerFiredFunction = f;
}
void setSharedTimerFireTime(double fireTime)
{
ASSERT(sharedTimerFiredFunction);
int interval = static_cast<int>( (fireTime - currentTime()) * 1000);
if (interval < 0)
interval = 0;
stopSharedTimer();
// Verify that we didn't leak the task or timer objects.
ASSERT(msgLoopTask == NULL);
msgLoopTask = new WebkitTimerTask(sharedTimerFiredFunction);
MessageLoop::current()->PostDelayedTask(FROM_HERE, msgLoopTask, interval);
}
void stopSharedTimer()
{
if (!msgLoopTask)
return;
msgLoopTask->Cancel();
msgLoopTask = NULL;
}
} // namespace WebCore
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