1/*
2 * Copyright (C) 2013 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 OriginLock_h
27#define OriginLock_h
28
29#if ENABLE(SQL_DATABASE)
30
31#include "FileSystem.h"
32#include <wtf/ThreadSafeRefCounted.h>
33#include <wtf/ThreadingPrimitives.h>
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38class OriginLock : public ThreadSafeRefCounted<OriginLock> {
39    WTF_MAKE_NONCOPYABLE(OriginLock); WTF_MAKE_FAST_ALLOCATED;
40public:
41    OriginLock(String originPath);
42    ~OriginLock();
43
44    void lock();
45    void unlock();
46
47    static void deleteLockFile(String originPath);
48
49private:
50    static String lockFileNameForPath(String originPath);
51
52    String m_lockFileName;
53    Mutex m_mutex;
54#if USE(FILE_LOCK)
55    PlatformFileHandle m_lockHandle;
56#endif
57};
58
59} // namespace WebCore
60
61#endif // ENABLE(SQL_DATABASE)
62
63#endif // OriginLock_h
64