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