1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 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 AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef IDBTransactionBackendImpl_h 27 #define IDBTransactionBackendImpl_h 28 29 #if ENABLE(INDEXED_DATABASE) 30 31 #include "DOMStringList.h" 32 #include "IDBBackingStore.h" 33 #include "IDBTransactionBackendInterface.h" 34 #include "IDBTransactionCallbacks.h" 35 #include "Timer.h" 36 #include <wtf/Deque.h> 37 #include <wtf/RefPtr.h> 38 39 namespace WebCore { 40 41 class IDBDatabaseBackendImpl; 42 43 class IDBTransactionBackendImpl : public IDBTransactionBackendInterface { 44 public: 45 static PassRefPtr<IDBTransactionBackendImpl> create(DOMStringList* objectStores, unsigned short mode, IDBDatabaseBackendImpl*); 46 virtual ~IDBTransactionBackendImpl(); 47 48 virtual PassRefPtr<IDBObjectStoreBackendInterface> objectStore(const String& name, ExceptionCode&); 49 virtual unsigned short mode() const { return m_mode; } 50 virtual bool scheduleTask(PassOwnPtr<ScriptExecutionContext::Task> task, PassOwnPtr<ScriptExecutionContext::Task> abortTask); 51 virtual void didCompleteTaskEvents(); 52 virtual void abort(); 53 virtual void setCallbacks(IDBTransactionCallbacks* callbacks) { m_callbacks = callbacks; } 54 55 void run(); 56 57 private: 58 IDBTransactionBackendImpl(DOMStringList* objectStores, unsigned short mode, IDBDatabaseBackendImpl*); 59 60 enum State { 61 Unused, // Created, but no tasks yet. 62 StartPending, // Enqueued tasks, but SQLite transaction not yet started. 63 Running, // SQLite transaction started but not yet finished. 64 Finished, // Either aborted or committed. 65 }; 66 67 void start(); 68 void commit(); 69 70 void taskTimerFired(Timer<IDBTransactionBackendImpl>*); 71 void taskEventTimerFired(Timer<IDBTransactionBackendImpl>*); 72 73 RefPtr<DOMStringList> m_objectStoreNames; 74 unsigned short m_mode; 75 76 State m_state; 77 RefPtr<IDBTransactionCallbacks> m_callbacks; 78 RefPtr<IDBDatabaseBackendImpl> m_database; 79 80 typedef Deque<OwnPtr<ScriptExecutionContext::Task> > TaskQueue; 81 TaskQueue m_taskQueue; 82 TaskQueue m_abortTaskQueue; 83 84 RefPtr<IDBBackingStore::Transaction> m_transaction; 85 86 // FIXME: delete the timer once we have threads instead. 87 Timer<IDBTransactionBackendImpl> m_taskTimer; 88 Timer<IDBTransactionBackendImpl> m_taskEventTimer; 89 int m_pendingEvents; 90 }; 91 92 } // namespace WebCore 93 94 #endif // ENABLE(INDEXED_DATABASE) 95 96 #endif // IDBTransactionBackendImpl_h 97
