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
34namespace JSC {
35
36 class ExecState;
37
38 class TimeoutChecker {
39 public:
40 TimeoutChecker();
41 virtual ~TimeoutChecker();
42
43 void setTimeoutInterval(unsigned timeoutInterval) { m_timeoutInterval = timeoutInterval; }
44 void setCheckInterval(unsigned checkInterval) { if (checkInterval) m_intervalBetweenChecks = checkInterval; }
45
46 unsigned ticksUntilNextCheck() { return m_ticksUntilNextCheck; }
47
48 void start()
49 {
50 if (!m_startCount)
51 reset();
52 ++m_startCount;
53 }
54
55 void stop()
56 {
57 ASSERT(m_startCount);
58 --m_startCount;
59 }
60
61 void reset();
62 void copyTimeoutValues(TimeoutChecker* other);
63
64 virtual bool didTimeOut(ExecState*);
65
66 private:
67 unsigned m_timeoutInterval;
68 unsigned m_timeAtLastCheck;
69 unsigned m_timeExecuting;
70 unsigned m_startCount;
71 unsigned m_ticksUntilNextCheck;
72 unsigned m_intervalBetweenChecks;
73 };
74
75} // namespace JSC
76
77#endif // TimeoutChecker_h
78

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/TimeoutChecker.h