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 #include "platform/Supplementable.h" 30 #include "wtf/Noncopyable.h" 31 #include "wtf/PassOwnPtr.h" 32 #include "wtf/Vector.h" 33 34 namespace WebCore { 35 36 class ExecutionContext; 37 class IDBTransaction; 38 39 // This class keeps track of the transactions created during the current 40 // Javascript execution context. Transactions have an internal |active| flag 41 // which is set to true on creation, but must be set to false when control 42 // returns to the event loop. 43 44 class IDBPendingTransactionMonitor : public Supplement<ExecutionContext> { 45 WTF_MAKE_NONCOPYABLE(IDBPendingTransactionMonitor); 46 47 public: 48 static IDBPendingTransactionMonitor& from(Supplementable<ExecutionContext>&); 49 virtual ~IDBPendingTransactionMonitor(); 50 // The trace functino doesn't work until ExecutionContext is moved to Oilpan 51 // heap. trace(Visitor * visitor)52 virtual void trace(Visitor* visitor) OVERRIDE { Supplement<ExecutionContext>::trace(visitor); } 53 void addNewTransaction(IDBTransaction&); 54 void deactivateNewTransactions(); 55 56 private: 57 IDBPendingTransactionMonitor(); 58 static const char* supplementName(); 59 60 typedef PersistentHeapVector<Member<IDBTransaction> > TransactionList; 61 TransactionList m_transactions; 62 }; 63 64 } // namespace WebCore 65 66 #endif // IDBPendingTransactionMonitor_h 67