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 SharedTimer_h
27#define SharedTimer_h
28
29#include "platform/PlatformExport.h"
30#include "wtf/FastAllocBase.h"
31#include "wtf/Noncopyable.h"
32
33namespace blink {
34
35// Each thread has its own single instance of shared timer, which implements this interface.
36// This instance is shared by all timers in the thread.
37// Not intended to be used directly; use the Timer class instead.
38class PLATFORM_EXPORT SharedTimer {
39    WTF_MAKE_NONCOPYABLE(SharedTimer); WTF_MAKE_FAST_ALLOCATED;
40public:
41    SharedTimer() { }
42    virtual ~SharedTimer() {}
43    virtual void setFiredFunction(void (*)()) = 0;
44
45    // The fire interval is in seconds relative to the current monotonic clock time.
46    virtual void setFireInterval(double) = 0;
47    virtual void stop() = 0;
48};
49
50
51PLATFORM_EXPORT void setSharedTimerFiredFunction(void (*)());
52PLATFORM_EXPORT void setSharedTimerFireInterval(double);
53PLATFORM_EXPORT void stopSharedTimer();
54
55class PLATFORM_EXPORT MainThreadSharedTimer : public SharedTimer {
56public:
57    virtual void setFiredFunction(void (*function)()) OVERRIDE
58    {
59        setSharedTimerFiredFunction(function);
60    }
61
62    virtual void setFireInterval(double interval) OVERRIDE
63    {
64        setSharedTimerFireInterval(interval);
65    }
66
67    virtual void stop() OVERRIDE
68    {
69        stopSharedTimer();
70    }
71};
72
73} // namespace blink
74
75#endif // SharedTimer_h
76