1/*
2 * Copyright (C) 2007, 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef DatabaseThread_h
29#define DatabaseThread_h
30
31#include "public/platform/WebThread.h"
32#include "wtf/Deque.h"
33#include "wtf/HashMap.h"
34#include "wtf/HashSet.h"
35#include "wtf/OwnPtr.h"
36#include "wtf/PassOwnPtr.h"
37#include "wtf/PassRefPtr.h"
38#include "wtf/RefPtr.h"
39#include "wtf/ThreadSafeRefCounted.h"
40
41namespace WebCore {
42
43class DatabaseBackend;
44class DatabaseTask;
45class DatabaseTaskSynchronizer;
46class Document;
47class SQLTransactionClient;
48class SQLTransactionCoordinator;
49
50class DatabaseThread : public ThreadSafeRefCounted<DatabaseThread> {
51public:
52    static PassRefPtr<DatabaseThread> create() { return adoptRef(new DatabaseThread); }
53    ~DatabaseThread();
54
55    void start();
56    void requestTermination(DatabaseTaskSynchronizer* cleanupSync);
57    bool terminationRequested(DatabaseTaskSynchronizer* taskSynchronizer = 0) const;
58
59    void scheduleTask(PassOwnPtr<DatabaseTask>);
60
61    void recordDatabaseOpen(DatabaseBackend*);
62    void recordDatabaseClosed(DatabaseBackend*);
63    bool isDatabaseOpen(DatabaseBackend*);
64
65    bool isDatabaseThread() { return m_thread && m_thread->isCurrentThread(); }
66
67    SQLTransactionClient* transactionClient() { return m_transactionClient.get(); }
68    SQLTransactionCoordinator* transactionCoordinator() { return m_transactionCoordinator.get(); }
69
70private:
71    DatabaseThread();
72
73    void cleanupDatabaseThread();
74
75    OwnPtr<blink::WebThread> m_thread;
76
77    // This set keeps track of the open databases that have been used on this thread.
78    typedef HashSet<RefPtr<DatabaseBackend> > DatabaseSet;
79    DatabaseSet m_openDatabaseSet;
80
81    OwnPtr<SQLTransactionClient> m_transactionClient;
82    OwnPtr<SQLTransactionCoordinator> m_transactionCoordinator;
83    DatabaseTaskSynchronizer* m_cleanupSync;
84    bool m_terminationRequested;
85};
86
87} // namespace WebCore
88
89#endif // DatabaseThread_h
90