cc/CCTimer.cpp

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6
   7 #include "CCTimer.h"
   8
   9 #include "CCThread.h"
  10
  11 namespace WebCore {
  12
  13 class CCTimerTask : public CCThread::Task {
  14 public:
  15     explicit CCTimerTask(CCTimer* timer)
  16         : CCThread::Task(0)
  17         , m_timer(timer)
  18     {
  19     }
  20
  21     ~CCTimerTask()
  22     {
  23         if (!m_timer)
  24             return;
  25
  26         ASSERT(m_timer->m_task == this);
  27         m_timer->stop();
  28     }
  29
  30     void performTask()
  31     {
  32         if (!m_timer)
  33             return;
  34
  35         CCTimerClient* client = m_timer->m_client;
  36
  37         m_timer->stop();
  38         if (client)
  39             client->onTimerFired();
  40     }
  41
  42 private:
  43     friend class CCTimer;
  44
  45     CCTimer* m_timer; // null if cancelled
  46 };
  47
  48 CCTimer::CCTimer(CCThread* thread, CCTimerClient* client)
  49     : m_client(client)
  50     , m_thread(thread)
  51     , m_task(0)
  52 {
  53 }
  54
  55 CCTimer::~CCTimer()
  56 {
  57     stop();
  58 }
  59
  60 void CCTimer::startOneShot(double intervalSeconds)
  61 {
  62     stop();
  63
  64     m_task = new CCTimerTask(this);
  65
  66     // The thread expects delays in milliseconds.
  67     m_thread->postDelayedTask(adoptPtr(m_task), intervalSeconds * 1000.0);
  68 }
  69
  70 void CCTimer::stop()
  71 {
  72     if (!m_task)
  73         return;
  74
  75     m_task->m_timer = 0;
  76     m_task = 0;
  77 }
  78
  79 } // namespace WebCore