1/*
2 * Copyright (C) 2008 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 TimeoutChecker_h
30#define TimeoutChecker_h
31
32#include <wtf/Assertions.h>
33
34#ifdef ANDROID_INSTRUMENT
35#include "TimeCounter.h"
36#endif
37
38namespace JSC {
39
40    class ExecState;
41
42    class TimeoutChecker {
43    public:
44        TimeoutChecker();
45
46        void setTimeoutInterval(unsigned timeoutInterval) { m_timeoutInterval = timeoutInterval; }
47        unsigned timeoutInterval() const { return m_timeoutInterval; }
48
49        unsigned ticksUntilNextCheck() { return m_ticksUntilNextCheck; }
50
51        void start()
52        {
53            if (!m_startCount)
54                reset();
55#ifdef ANDROID_INSTRUMENT
56            if (!m_startCount)
57                android::TimeCounter::start(android::TimeCounter::JavaScriptTimeCounter);
58#endif
59            ++m_startCount;
60        }
61
62        void stop()
63        {
64            ASSERT(m_startCount);
65            --m_startCount;
66#ifdef ANDROID_INSTRUMENT
67            if (!m_startCount)
68                android::TimeCounter::record(android::TimeCounter::JavaScriptTimeCounter, __FUNCTION__);
69#endif
70        }
71
72        void reset();
73
74        bool didTimeOut(ExecState*);
75
76    private:
77        unsigned m_timeoutInterval;
78        unsigned m_timeAtLastCheck;
79        unsigned m_timeExecuting;
80        unsigned m_startCount;
81        unsigned m_ticksUntilNextCheck;
82    };
83
84} // namespace JSC
85
86#endif // TimeoutChecker_h
87