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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
      3  * Copyright (C) 2009 Google Inc.  All rights reserved.
      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 COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef ThreadTimers_h
     28 #define ThreadTimers_h
     29 
     30 #include "platform/PlatformExport.h"
     31 #include "wtf/Noncopyable.h"
     32 #include "wtf/HashSet.h"
     33 #include "wtf/Vector.h"
     34 
     35 namespace WebCore {
     36 
     37 class SharedTimer;
     38 class TimerBase;
     39 
     40 // A collection of timers per thread. Kept in PlatformThreadData.
     41 class PLATFORM_EXPORT ThreadTimers {
     42     WTF_MAKE_NONCOPYABLE(ThreadTimers); WTF_MAKE_FAST_ALLOCATED;
     43 public:
     44     ThreadTimers();
     45 
     46     // On a thread different then main, we should set the thread's instance of the SharedTimer.
     47     void setSharedTimer(SharedTimer*);
     48 
     49     Vector<TimerBase*>& timerHeap() { return m_timerHeap; }
     50 
     51     void updateSharedTimer();
     52     void fireTimersInNestedEventLoop();
     53 
     54 private:
     55     static void sharedTimerFired();
     56 
     57     void sharedTimerFiredInternal();
     58     void fireTimersInNestedEventLoopInternal();
     59 
     60     Vector<TimerBase*> m_timerHeap;
     61     SharedTimer* m_sharedTimer; // External object, can be a run loop on a worker thread. Normally set/reset by worker thread.
     62     bool m_firingTimers; // Reentrancy guard.
     63     double m_pendingSharedTimerFireTime;
     64 };
     65 
     66 }
     67 
     68 #endif
     69