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 * 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#include "config.h"
27#include "LocalStorageThread.h"
28
29#if ENABLE(DOM_STORAGE)
30
31#include "LocalStorageTask.h"
32#include "StorageAreaSync.h"
33
34namespace WebCore {
35
36PassOwnPtr<LocalStorageThread> LocalStorageThread::create()
37{
38    return adoptPtr(new LocalStorageThread);
39}
40
41LocalStorageThread::LocalStorageThread()
42    : m_threadID(0)
43{
44}
45
46LocalStorageThread::~LocalStorageThread()
47{
48    ASSERT(isMainThread());
49    ASSERT(!m_threadID);
50}
51
52bool LocalStorageThread::start()
53{
54    ASSERT(isMainThread());
55    if (!m_threadID)
56        m_threadID = createThread(LocalStorageThread::threadEntryPointCallback, this, "WebCore: LocalStorage");
57    return m_threadID;
58}
59
60void* LocalStorageThread::threadEntryPointCallback(void* thread)
61{
62    return static_cast<LocalStorageThread*>(thread)->threadEntryPoint();
63}
64
65void* LocalStorageThread::threadEntryPoint()
66{
67    ASSERT(!isMainThread());
68    while (OwnPtr<LocalStorageTask> task = m_queue.waitForMessage())
69        task->performTask();
70
71    return 0;
72}
73
74void LocalStorageThread::scheduleTask(PassOwnPtr<LocalStorageTask> task)
75{
76    ASSERT(isMainThread());
77    ASSERT(!m_queue.killed() && m_threadID);
78    m_queue.append(task);
79}
80
81void LocalStorageThread::terminate()
82{
83    ASSERT(isMainThread());
84    ASSERT(!m_queue.killed() && m_threadID);
85    // Even in weird, exceptional cases, don't wait on a nonexistent thread to terminate.
86    if (!m_threadID)
87        return;
88
89    void* returnValue;
90    m_queue.append(LocalStorageTask::createTerminate(this));
91    waitForThreadCompletion(m_threadID, &returnValue);
92    ASSERT(m_queue.killed());
93    m_threadID = 0;
94}
95
96void LocalStorageThread::performTerminate()
97{
98    ASSERT(!isMainThread());
99    m_queue.kill();
100}
101
102}
103
104#endif // ENABLE(DOM_STORAGE)
105