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 IDBPendingTransactionMonitor_h 27 #define IDBPendingTransactionMonitor_h 28 29 #if ENABLE(INDEXED_DATABASE) 30 31 #include <wtf/Noncopyable.h> 32 #include <wtf/Vector.h> 33 34 namespace WebCore { 35 36 class IDBTransactionBackendInterface; 37 38 // This class keeps track of the transactions created during the current 39 // Javascript execution context. A transaction is 'pending' if no asynchronous 40 // operation is currently queued for it (e.g. an IDBObjectStore::put() or similar). 41 // All pending transactions are aborted as soon as execution returns from 42 // the script engine. 43 // 44 // FIXME: move the vector of transactions to TLS. Keeping it static 45 // will not work once we add support for workers. Another possible 46 // solution is to keep the vector in the ScriptExecutionContext. 47 class IDBPendingTransactionMonitor { 48 WTF_MAKE_NONCOPYABLE(IDBPendingTransactionMonitor); 49 public: 50 static void addPendingTransaction(IDBTransactionBackendInterface*); 51 static void removePendingTransaction(IDBTransactionBackendInterface*); 52 static void abortPendingTransactions(); 53 54 private: 55 IDBPendingTransactionMonitor(); 56 57 static Vector<IDBTransactionBackendInterface*>* m_transactions; 58 }; 59 60 } // namespace WebCore 61 62 #endif // ENABLE(INDEXED_DATABASE) 63 64 #endif // IDBPendingTransactionMonitor_h 65
