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      1 /*
      2  * Copyright (C) 2009 Apple 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  *
      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  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef RunLoopTimer_h
     30 #define RunLoopTimer_h
     31 
     32 #include "SchedulePair.h"
     33 #include <wtf/RetainPtr.h>
     34 
     35 namespace WebCore {
     36 
     37 // Time intervals are all in seconds.
     38 
     39 class RunLoopTimerBase {
     40     WTF_MAKE_NONCOPYABLE(RunLoopTimerBase);
     41 public:
     42     RunLoopTimerBase() { }
     43     virtual ~RunLoopTimerBase();
     44 
     45     void schedule(const SchedulePair*);
     46     void schedule(const SchedulePairHashSet&);
     47 
     48     void start(double nextFireInterval, double repeatInterval);
     49 
     50     void startRepeating(double repeatInterval) { start(repeatInterval, repeatInterval); }
     51     void startOneShot(double interval) { start(interval, 0); }
     52 
     53     void stop();
     54     bool isActive() const;
     55 
     56     virtual void fired() = 0;
     57 
     58 private:
     59 #if USE(CF)
     60     RetainPtr<CFRunLoopTimerRef> m_timer;
     61 #endif
     62 };
     63 
     64 template <typename TimerFiredClass> class RunLoopTimer : public RunLoopTimerBase {
     65 public:
     66     typedef void (TimerFiredClass::*TimerFiredFunction)(RunLoopTimer*);
     67 
     68     RunLoopTimer(TimerFiredClass* o, TimerFiredFunction f)
     69         : m_object(o), m_function(f) { }
     70 
     71     virtual void fired() { (m_object->*m_function)(this); }
     72 
     73 private:
     74     TimerFiredClass* m_object;
     75     TimerFiredFunction m_function;
     76 };
     77 
     78 } // namespace WebCore
     79 
     80 #endif
     81