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 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 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#pragma once
29
30#include "ActiveDOMObject.h"
31#include <wtf/RefPtr.h>
32#include <wtf/ThreadSafeRefCounted.h>
33
34#if PLATFORM(IOS_FAMILY)
35#include <wtf/Threading.h>
36#endif
37
38namespace WebCore {
39
40class Database;
41class DatabaseDetails;
42class DatabaseTaskSynchronizer;
43class DatabaseThread;
44class SecurityOrigin;
45struct SecurityOriginData;
46
47class DatabaseContext final : public ThreadSafeRefCounted<DatabaseContext>, private ActiveDOMObject {
48public:
49 virtual ~DatabaseContext();
50
51 DatabaseThread* existingDatabaseThread() const { return m_databaseThread.get(); }
52 DatabaseThread* databaseThread();
53
54 void setHasOpenDatabases() { m_hasOpenDatabases = true; }
55 bool hasOpenDatabases() const { return m_hasOpenDatabases; }
56
57 // When the database cleanup is done, the sychronizer will be signalled.
58 bool stopDatabases(DatabaseTaskSynchronizer*);
59
60 bool allowDatabaseAccess() const;
61 void databaseExceededQuota(const String& name, DatabaseDetails);
62
63 using ActiveDOMObject::scriptExecutionContext;
64 const SecurityOriginData& securityOrigin() const;
65
66 bool isContextThread() const;
67
68private:
69 explicit DatabaseContext(ScriptExecutionContext&);
70
71 void stopDatabases() { stopDatabases(nullptr); }
72
73 void contextDestroyed() override;
74 void stop() override;
75 bool canSuspendForDocumentSuspension() const override;
76 const char* activeDOMObjectName() const override { return "DatabaseContext"; }
77
78 RefPtr<DatabaseThread> m_databaseThread;
79 bool m_hasOpenDatabases { false }; // This never changes back to false, even after the database thread is closed.
80 bool m_hasRequestedTermination { false };
81
82 friend class DatabaseManager;
83};
84
85} // namespace WebCore
86