1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * Copyright (C) 2013 Apple 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 are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef SQLTransactionCoordinator_h 33 #define SQLTransactionCoordinator_h 34 35 #include "wtf/Deque.h" 36 #include "wtf/HashMap.h" 37 #include "wtf/HashSet.h" 38 #include "wtf/RefPtr.h" 39 #include "wtf/text/StringHash.h" 40 41 namespace WebCore { 42 43 class SQLTransactionBackend; 44 45 class SQLTransactionCoordinator { 46 WTF_MAKE_NONCOPYABLE(SQLTransactionCoordinator); WTF_MAKE_FAST_ALLOCATED; 47 public: 48 SQLTransactionCoordinator(); 49 void acquireLock(SQLTransactionBackend*); 50 void releaseLock(SQLTransactionBackend*); 51 void shutdown(); 52 private: 53 typedef Deque<RefPtr<SQLTransactionBackend> > TransactionsQueue; 54 struct CoordinationInfo { 55 TransactionsQueue pendingTransactions; 56 HashSet<RefPtr<SQLTransactionBackend> > activeReadTransactions; 57 RefPtr<SQLTransactionBackend> activeWriteTransaction; 58 }; 59 // Maps database names to information about pending transactions 60 typedef HashMap<String, CoordinationInfo> CoordinationInfoMap; 61 CoordinationInfoMap m_coordinationInfoMap; 62 bool m_isShuttingDown; 63 64 void processPendingTransactions(CoordinationInfo&); 65 }; 66 67 } // namespace WebCore 68 69 #endif // SQLTransactionCoordinator_h 70