1/*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 * Copyright (C) 2011 Google, Inc. All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 */
27
28#ifndef DatabaseContext_h
29#define DatabaseContext_h
30
31#include "core/dom/ActiveDOMObject.h"
32#include "wtf/PassRefPtr.h"
33#include "wtf/ThreadSafeRefCounted.h"
34
35namespace WebCore {
36
37class Database;
38class DatabaseContext;
39class DatabaseTaskSynchronizer;
40class DatabaseThread;
41class ExecutionContext;
42class SecurityOrigin;
43
44class DatabaseContext : public ThreadSafeRefCounted<DatabaseContext>, public ActiveDOMObject {
45public:
46    friend class DatabaseManager;
47
48    static PassRefPtr<DatabaseContext> create(ExecutionContext*);
49
50    virtual ~DatabaseContext();
51
52    // For life-cycle management (inherited from ActiveDOMObject):
53    virtual void contextDestroyed();
54    virtual void stop();
55
56    PassRefPtr<DatabaseContext> backend();
57    DatabaseThread* databaseThread();
58
59    void setHasOpenDatabases() { m_hasOpenDatabases = true; }
60    bool hasOpenDatabases() { return m_hasOpenDatabases; }
61
62    // When the database cleanup is done, cleanupSync will be signalled.
63    bool stopDatabases(DatabaseTaskSynchronizer*);
64
65    bool allowDatabaseAccess() const;
66
67    SecurityOrigin* securityOrigin() const;
68    bool isContextThread() const;
69
70private:
71    explicit DatabaseContext(ExecutionContext*);
72
73    void stopDatabases() { stopDatabases(0); }
74
75    RefPtr<DatabaseThread> m_databaseThread;
76    bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed.
77    bool m_isRegistered;
78    bool m_hasRequestedTermination;
79};
80
81} // namespace WebCore
82
83#endif // DatabaseContext_h
84