1/* 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef Timer_h 27#define Timer_h 28 29#include <wtf/Noncopyable.h> 30#include <wtf/Threading.h> 31 32namespace WebCore { 33 34// Time intervals are all in seconds. 35 36class TimerHeapElement; 37 38class TimerBase : public Noncopyable { 39public: 40 TimerBase(); 41 virtual ~TimerBase(); 42 43 void start(double nextFireInterval, double repeatInterval); 44 45 void startRepeating(double repeatInterval) { start(repeatInterval, repeatInterval); } 46 void startOneShot(double interval) { start(interval, 0); } 47 48 void stop(); 49 bool isActive() const; 50 51 double nextFireInterval() const; 52 double repeatInterval() const { return m_repeatInterval; } 53 54 void augmentRepeatInterval(double delta) { setNextFireTime(m_nextFireTime + delta); m_repeatInterval += delta; } 55 56 static void fireTimersInNestedEventLoop(); 57 58private: 59 virtual void fired() = 0; 60 61 void checkConsistency() const; 62 void checkHeapIndex() const; 63 64 void setNextFireTime(double); 65 66 bool inHeap() const { return m_heapIndex != -1; } 67 68 void heapDecreaseKey(); 69 void heapDelete(); 70 void heapDeleteMin(); 71 void heapIncreaseKey(); 72 void heapInsert(); 73 void heapPop(); 74 void heapPopMin(); 75 76 double m_nextFireTime; // 0 if inactive 77 double m_repeatInterval; // 0 if not repeating 78 int m_heapIndex; // -1 if not in heap 79 unsigned m_heapInsertionOrder; // Used to keep order among equal-fire-time timers 80 81#ifndef NDEBUG 82 ThreadIdentifier m_thread; 83#endif 84 85 friend class TimerHeapElement; 86 friend class ThreadTimers; 87 friend bool operator<(const TimerHeapElement&, const TimerHeapElement&); 88}; 89 90template <typename TimerFiredClass> class Timer : public TimerBase { 91public: 92 typedef void (TimerFiredClass::*TimerFiredFunction)(Timer*); 93 94 Timer(TimerFiredClass* o, TimerFiredFunction f) 95 : m_object(o), m_function(f) { } 96 97private: 98 virtual void fired() { (m_object->*m_function)(this); } 99 100 TimerFiredClass* m_object; 101 TimerFiredFunction m_function; 102}; 103 104inline bool TimerBase::isActive() const 105{ 106 ASSERT(m_thread == currentThread()); 107 return m_nextFireTime; 108} 109 110} 111 112#endif 113