1/*
2 * Copyright (C) 2010 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 * 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 INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ResponsivenessTimer_h
27#define ResponsivenessTimer_h
28
29#include "RunLoop.h"
30
31namespace WebKit {
32
33class ResponsivenessTimer {
34public:
35    class Client {
36    public:
37        virtual ~Client() { }
38        virtual void didBecomeUnresponsive(ResponsivenessTimer*) = 0;
39        virtual void didBecomeResponsive(ResponsivenessTimer*) = 0;
40    };
41
42    ResponsivenessTimer(ResponsivenessTimer::Client*);
43    ~ResponsivenessTimer();
44
45    void start();
46    void stop();
47
48    void invalidate();
49
50    bool isResponsive() { return m_isResponsive; }
51
52private:
53    void timerFired();
54
55    ResponsivenessTimer::Client* m_client;
56    bool m_isResponsive;
57
58    RunLoop::Timer<ResponsivenessTimer> m_timer;
59};
60
61} // namespace WebKit
62
63#endif // ResponsivenessTimer_h
64
65