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 IDBTransactionCoordinator_h 27 #define IDBTransactionCoordinator_h 28 29 #if ENABLE(INDEXED_DATABASE) 30 31 #include "DOMStringList.h" 32 #include "IDBTransactionBackendInterface.h" 33 #include <wtf/ListHashSet.h> 34 #include <wtf/RefPtr.h> 35 36 namespace WebCore { 37 38 class IDBTransactionBackendImpl; 39 class IDBTransactionCallbacks; 40 class IDBDatabaseBackendImpl; 41 42 // Transactions are executed in the order the were created. 43 class IDBTransactionCoordinator : public RefCounted<IDBTransactionCoordinator> { 44 public: 45 static PassRefPtr<IDBTransactionCoordinator> create(); 46 virtual ~IDBTransactionCoordinator(); 47 48 // Called by transactions as they start and finish. 49 void didCreateTransaction(IDBTransactionBackendImpl*); 50 void didStartTransaction(IDBTransactionBackendImpl*); 51 void didFinishTransaction(IDBTransactionBackendImpl*); 52 53 #ifndef NDEBUG 54 bool isActive(IDBTransactionBackendImpl*); 55 #endif 56 57 private: 58 IDBTransactionCoordinator(); 59 60 void processStartedTransactions(); 61 62 // This is just an efficient way to keep references to all transactions. 63 HashMap<IDBTransactionBackendImpl*, RefPtr<IDBTransactionBackendImpl> > m_transactions; 64 // Transactions in different states are grouped below. 65 ListHashSet<IDBTransactionBackendImpl*> m_startedTransactions; 66 HashSet<IDBTransactionBackendImpl*> m_runningTransactions; 67 }; 68 69 } // namespace WebCore 70 71 #endif // ENABLE(INDEXED_DATABASE) 72 73 #endif // IDBTransactionCoordinator_h 74