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 * 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. ``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 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 SuddenTermination_h
27#define SuddenTermination_h
28
29#include <wtf/Noncopyable.h>
30
31namespace WebCore {
32
33 // Once disabled via one or more more calls to disableSuddenTermination(), fast shutdown
34 // is not valid until enableSuddenTermination() has been called an equal number of times.
35 // On Mac, these are thin wrappers around Mac OS X functions of the same name.
36#if PLATFORM(MAC)
37 WEBCORE_EXPORT void disableSuddenTermination();
38 WEBCORE_EXPORT void enableSuddenTermination();
39#else
40 inline void disableSuddenTermination() { }
41 inline void enableSuddenTermination() { }
42#endif
43
44 class SuddenTerminationDisabler {
45 WTF_MAKE_NONCOPYABLE(SuddenTerminationDisabler);
46 public:
47 SuddenTerminationDisabler()
48 {
49 disableSuddenTermination();
50 }
51
52 ~SuddenTerminationDisabler()
53 {
54 enableSuddenTermination();
55 }
56 };
57
58} // namespace WebCore
59
60#endif // SuddenTermination_h
61