1/*
2 * Copyright (C) 2010 Google, 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 GOOGLE 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 GOOGLE 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 IgnoreDestructiveWriteCountIncrementer_h
27#define IgnoreDestructiveWriteCountIncrementer_h
28
29#include "Document.h"
30
31namespace WebCore {
32
33class IgnoreDestructiveWriteCountIncrementer {
34    WTF_MAKE_NONCOPYABLE(IgnoreDestructiveWriteCountIncrementer);
35public:
36    explicit IgnoreDestructiveWriteCountIncrementer(Document* document)
37        : m_count(document ? &document->m_ignoreDestructiveWriteCount : 0)
38    {
39        if (!m_count)
40            return;
41        ++(*m_count);
42    }
43
44    ~IgnoreDestructiveWriteCountIncrementer()
45    {
46        if (!m_count)
47            return;
48        --(*m_count);
49    }
50
51private:
52    unsigned* m_count;
53};
54
55}
56
57#endif
58