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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     16  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     18  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     20  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     21  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     22  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     23  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     24  * THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "RunLoop.h"
     29 
     30 #include "WorkItem.h"
     31 
     32 #include <QApplication>
     33 #include <QAbstractEventDispatcher>
     34 #include <QObject>
     35 #include <QMetaMethod>
     36 #include <QMetaObject>
     37 #include <QTimerEvent>
     38 
     39 class RunLoop::TimerObject : public QObject
     40 {
     41     Q_OBJECT
     42 public:
     43     TimerObject(RunLoop* runLoop) : m_runLoop(runLoop)
     44     {
     45         int methodIndex = metaObject()->indexOfMethod("performWork()");
     46         m_method = metaObject()->method(methodIndex);
     47     }
     48 
     49     Q_SLOT void performWork() { m_runLoop->performWork(); }
     50     inline void wakeUp() { m_method.invoke(this, Qt::QueuedConnection); }
     51 
     52 protected:
     53     virtual void timerEvent(QTimerEvent* event)
     54     {
     55         RunLoop::TimerBase::timerFired(m_runLoop, event->timerId());
     56     }
     57 
     58 private:
     59     RunLoop* m_runLoop;
     60     QMetaMethod m_method;
     61 };
     62 
     63 void RunLoop::run()
     64 {
     65     QCoreApplication::exec();
     66 }
     67 
     68 void RunLoop::stop()
     69 {
     70     QCoreApplication::exit();
     71 }
     72 
     73 RunLoop::RunLoop()
     74     : m_timerObject(new TimerObject(this))
     75 {
     76 }
     77 
     78 RunLoop::~RunLoop()
     79 {
     80     delete m_timerObject;
     81 }
     82 
     83 void RunLoop::wakeUp()
     84 {
     85     m_timerObject->wakeUp();
     86 }
     87 
     88 // RunLoop::Timer
     89 
     90 void RunLoop::TimerBase::timerFired(RunLoop* runLoop, int ID)
     91 {
     92     TimerMap::iterator it = runLoop->m_activeTimers.find(ID);
     93     ASSERT(it != runLoop->m_activeTimers.end());
     94     TimerBase* timer = it->second;
     95 
     96     if (!timer->m_isRepeating) {
     97         // Stop the timer (calling stop would need another hash table lookup).
     98         runLoop->m_activeTimers.remove(it);
     99         runLoop->m_timerObject->killTimer(timer->m_ID);
    100         timer->m_ID = 0;
    101     }
    102 
    103     timer->fired();
    104 }
    105 
    106 RunLoop::TimerBase::TimerBase(RunLoop* runLoop)
    107     : m_runLoop(runLoop)
    108     , m_ID(0)
    109     , m_isRepeating(false)
    110 {
    111 }
    112 
    113 RunLoop::TimerBase::~TimerBase()
    114 {
    115     stop();
    116 }
    117 
    118 void RunLoop::TimerBase::start(double nextFireInterval, bool repeat)
    119 {
    120     stop();
    121     int millis = static_cast<int>(nextFireInterval * 1000);
    122     m_isRepeating = repeat;
    123     m_ID = m_runLoop->m_timerObject->startTimer(millis);
    124     ASSERT(m_ID);
    125     m_runLoop->m_activeTimers.set(m_ID, this);
    126 }
    127 
    128 void RunLoop::TimerBase::stop()
    129 {
    130     if (!m_ID)
    131         return;
    132     TimerMap::iterator it = m_runLoop->m_activeTimers.find(m_ID);
    133     if (it == m_runLoop->m_activeTimers.end())
    134         return;
    135 
    136     m_runLoop->m_activeTimers.remove(it);
    137     m_runLoop->m_timerObject->killTimer(m_ID);
    138     m_ID = 0;
    139 }
    140 
    141 bool RunLoop::TimerBase::isActive() const
    142 {
    143     return m_ID;
    144 }
    145 
    146 #include "RunLoopQt.moc"
    147