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
34 namespace WebCore {
35
create()36 PassOwnPtr<LocalStorageThread> LocalStorageThread::create()
37 {
38 return adoptPtr(new LocalStorageThread);
39 }
40
LocalStorageThread()41 LocalStorageThread::LocalStorageThread()
42 : m_threadID(0)
43 {
44 }
45
~LocalStorageThread()46 LocalStorageThread::~LocalStorageThread()
47 {
48 ASSERT(isMainThread());
49 ASSERT(!m_threadID);
50 }
51
start()52 bool 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
threadEntryPointCallback(void * thread)60 void* LocalStorageThread::threadEntryPointCallback(void* thread)
61 {
62 return static_cast<LocalStorageThread*>(thread)->threadEntryPoint();
63 }
64
threadEntryPoint()65 void* LocalStorageThread::threadEntryPoint()
66 {
67 ASSERT(!isMainThread());
68 while (OwnPtr<LocalStorageTask> task = m_queue.waitForMessage())
69 task->performTask();
70
71 return 0;
72 }
73
scheduleTask(PassOwnPtr<LocalStorageTask> task)74 void LocalStorageThread::scheduleTask(PassOwnPtr<LocalStorageTask> task)
75 {
76 ASSERT(isMainThread());
77 ASSERT(!m_queue.killed() && m_threadID);
78 m_queue.append(task);
79 }
80
terminate()81 void 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
performTerminate()96 void LocalStorageThread::performTerminate()
97 {
98 ASSERT(!isMainThread());
99 m_queue.kill();
100 }
101
102 }
103
104 #endif // ENABLE(DOM_STORAGE)
105