text: /*
   * Copyright (C) 2010, 2012 Apple 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "RunLoop.h"
  
  #include <CoreFoundation/CoreFoundation.h>
  #include <dispatch/dispatch.h>
  #include <wtf/AutodrainedPool.h>
  
  namespace WTF {
  
  void RunLoop::performWork(void* context)
  {
      AutodrainedPool pool;
      static_cast<RunLoop*>(context)->performWork();
  }
  
  RunLoop::RunLoop()
      : m_runLoop(CFRunLoopGetCurrent())
  {
      CFRunLoopSourceContext context = { 0, this, 0, 0, 0, 0, 0, 0, 0, performWork };
      m_runLoopSource = adoptCF(CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context));
      CFRunLoopAddSource(m_runLoop.get(), m_runLoopSource.get(), kCFRunLoopCommonModes);
  }
  
  RunLoop::~RunLoop()
  {
      CFRunLoopSourceInvalidate(m_runLoopSource.get());
  }
  
  void RunLoop::runForDuration(double duration)
  {
      CFRunLoopRunInMode(kCFRunLoopDefaultMode, duration, true);
  }
  
  void RunLoop::wakeUp()
  {
      CFRunLoopSourceSignal(m_runLoopSource.get());
      CFRunLoopWakeUp(m_runLoop.get());
  }
  
  void RunLoop::run()
  {
      AutodrainedPool pool;
      CFRunLoopRun();
  }
  
  void RunLoop::stop()
  {
      ASSERT(m_runLoop == CFRunLoopGetCurrent());
      CFRunLoopStop(m_runLoop.get());
  }
  
  // RunLoop::Timer
  
  void RunLoop::TimerBase::timerFired(CFRunLoopTimerRef, void* context)
  {
      TimerBase* timer = static_cast<TimerBase*>(context);
  
      AutodrainedPool pool;
      timer->fired();
  }
  
  RunLoop::TimerBase::TimerBase(RunLoop& runLoop)
      : m_runLoop(runLoop)
  {
  }
  
  RunLoop::TimerBase::~TimerBase()
  {
      stop();
  }
  
  void RunLoop::TimerBase::start(double nextFireInterval, bool repeat)
  {
      if (m_timer)
          stop();
      
      CFRunLoopTimerContext context = { 0, this, 0, 0, 0 };
      CFTimeInterval repeatInterval = repeat ? nextFireInterval : 0;
      m_timer = adoptCF(CFRunLoopTimerCreate(kCFAllocatorDefault, CFAbsoluteTimeGetCurrent() + nextFireInterval, repeatInterval, 0, 0, timerFired, &context));
      CFRunLoopAddTimer(m_runLoop.m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
  }
  
  void RunLoop::TimerBase::stop()
  {
      if (!m_timer)
          return;
      
      CFRunLoopTimerInvalidate(m_timer.get());
      m_timer = nullptr;
  }
  
  bool RunLoop::TimerBase::isActive() const
  {
      return m_timer && CFRunLoopTimerIsValid(m_timer.get());
  }
  
  } // namespace WTF
  