CCTimer.cpp   [plain text]

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"
#include "cc/CCTimer.h"

namespace WebCore {

class CCTimerTask : public CCThread::Task {
public:
    explicit CCTimerTask(CCTimer* timer)
        : CCThread::Task(0)
        , m_timer(timer)
    {
    }

    ~CCTimerTask()
    {
        if (!m_timer)
            return;

        ASSERT(m_timer->m_task == this);
        m_timer->stop();
    }

    void performTask()
    {
        if (!m_timer || !m_timer->m_client)
            return;

        m_timer->m_client->onTimerFired();
    }

private:
    friend class CCTimer;

    CCTimer* m_timer; // null if cancelled
};

CCTimer::CCTimer(CCThread* thread, CCTimerClient* client)
    : m_client(client)
    , m_thread(thread)
    , m_task(0)
{
}

CCTimer::~CCTimer()
{
    stop();
}

void CCTimer::startOneShot(double intervalSeconds)
{
    stop();

    m_task = new CCTimerTask(this);

    // The thread expects delays in milliseconds.
    m_thread->postDelayedTask(adoptPtr(m_task), intervalSeconds * 1000.0);
}

void CCTimer::stop()
{
    if (!m_task)
        return;

    m_task->m_timer = 0;
    m_task = 0;
}

} // namespace WebCore