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#ifndef DatabaseContext_h 29#define DatabaseContext_h 30 31#if ENABLE(SQL_DATABASE) 32 33#include "ActiveDOMObject.h" 34#include <wtf/RefPtr.h> 35#include <wtf/ThreadSafeRefCounted.h> 36 37#if PLATFORM(IOS) 38#include <wtf/Threading.h> 39#endif 40 41namespace WebCore { 42 43class Database; 44class DatabaseDetails; 45class DatabaseBackendContext; 46class DatabaseTaskSynchronizer; 47class DatabaseThread; 48 49class DatabaseContext : public ThreadSafeRefCounted<DatabaseContext>, private ActiveDOMObject { 50public: 51 virtual ~DatabaseContext(); 52 53 PassRefPtr<DatabaseBackendContext> backend(); 54 DatabaseThread* databaseThread(); 55 56#if PLATFORM(IOS) 57 void setPaused(bool); 58#endif 59 60 void setHasOpenDatabases() { m_hasOpenDatabases = true; } 61 bool hasOpenDatabases() { return m_hasOpenDatabases; } 62 63 // When the database cleanup is done, the sychronizer will be signalled. 64 bool stopDatabases(DatabaseTaskSynchronizer*); 65 66 bool allowDatabaseAccess() const; 67 void databaseExceededQuota(const String& name, DatabaseDetails); 68 69private: 70 explicit DatabaseContext(ScriptExecutionContext*); 71 72 void stopDatabases() { stopDatabases(nullptr); } 73 74 virtual void contextDestroyed() override final; 75 virtual void stop() override final; 76 77 RefPtr<DatabaseThread> m_databaseThread; 78 bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed. 79 bool m_isRegistered; 80 bool m_hasRequestedTermination; 81 82 friend class DatabaseBackendContext; 83 friend class DatabaseManager; 84 85#if PLATFORM(IOS) 86 Mutex m_databaseThreadMutex; 87 bool m_paused; 88#endif 89}; 90 91} // namespace WebCore 92 93#endif // ENABLE(SQL_DATABASE) 94 95#endif // DatabaseContext_h 96