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// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "cc/timer.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "cc/thread.h"
namespace cc {
class TimerTask : public Thread::Task {
public:
explicit TimerTask(Timer* timer)
: Thread::Task(0)
, m_timer(timer)
{
}
virtual ~TimerTask()
{
if (!m_timer)
return;
DCHECK(m_timer->m_task == this);
m_timer->stop();
}
virtual void performTask() OVERRIDE
{
if (!m_timer)
return;
TimerClient* client = m_timer->m_client;
m_timer->stop();
if (client)
client->onTimerFired();
}
private:
friend class Timer;
Timer* m_timer; // null if cancelled
};
Timer::Timer(Thread* thread, TimerClient* client)
: m_client(client)
, m_thread(thread)
, m_task(0)
{
}
Timer::~Timer()
{
stop();
}
void Timer::startOneShot(double intervalSeconds)
{
stop();
m_task = new TimerTask(this);
// The thread expects delays in milliseconds.
m_thread->postDelayedTask(adoptPtr(m_task), intervalSeconds * 1000.0);
}
void Timer::stop()
{
if (!m_task)
return;
m_task->m_timer = 0;
m_task = 0;
}
} // namespace cc
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