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 "modules/webdatabase/DatabaseDetails.h" 33 #include "wtf/Assertions.h" 34 #include "wtf/ThreadSafeRefCounted.h" 35 36 namespace WebCore { 37 38 class Database; 39 class DatabaseBackendContext; 40 class DatabaseTaskSynchronizer; 41 class DatabaseThread; 42 class ScriptExecutionContext; 43 44 class DatabaseContext : public ThreadSafeRefCounted<DatabaseContext>, public ActiveDOMObject { 45 public: 46 virtual ~DatabaseContext(); 47 48 // For life-cycle management (inherited from ActiveDOMObject): 49 virtual void contextDestroyed(); 50 virtual void stop(); 51 52 PassRefPtr<DatabaseBackendContext> backend(); 53 DatabaseThread* databaseThread(); 54 55 void setHasOpenDatabases() { m_hasOpenDatabases = true; } 56 bool hasOpenDatabases() { return m_hasOpenDatabases; } 57 58 // When the database cleanup is done, cleanupSync will be signalled. 59 bool stopDatabases(DatabaseTaskSynchronizer*); 60 61 bool allowDatabaseAccess() const; 62 63 private: 64 explicit DatabaseContext(ScriptExecutionContext*); 65 66 void stopDatabases() { stopDatabases(0); } 67 68 RefPtr<DatabaseThread> m_databaseThread; 69 bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed. 70 bool m_isRegistered; 71 bool m_hasRequestedTermination; 72 73 friend class DatabaseBackendContext; 74 friend class DatabaseManager; 75 }; 76 77 } // namespace WebCore 78 79 #endif // DatabaseContext_h 80