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 "platform/heap/Handle.h" 36 #include "wtf/Deque.h" 37 #include "wtf/HashMap.h" 38 #include "wtf/HashSet.h" 39 #include "wtf/RefPtr.h" 40 #include "wtf/text/StringHash.h" 41 42 namespace WebCore { 43 44 class SQLTransactionBackend; 45 46 class SQLTransactionCoordinator : public NoBaseWillBeGarbageCollected<SQLTransactionCoordinator> { 47 WTF_MAKE_NONCOPYABLE(SQLTransactionCoordinator); 48 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 49 public: 50 SQLTransactionCoordinator(); 51 void trace(Visitor*); 52 void acquireLock(SQLTransactionBackend*); 53 void releaseLock(SQLTransactionBackend*); 54 void shutdown(); 55 private: 56 typedef Deque<RefPtrWillBeMember<SQLTransactionBackend> > TransactionsQueue; 57 struct CoordinationInfo { 58 TransactionsQueue pendingTransactions; 59 WillBeHeapHashSet<RefPtrWillBeMember<SQLTransactionBackend> > activeReadTransactions; 60 RefPtrWillBeMember<SQLTransactionBackend> activeWriteTransaction; 61 62 void trace(Visitor* visitor) 63 { 64 visitor->trace(pendingTransactions); 65 visitor->trace(activeReadTransactions); 66 visitor->trace(activeWriteTransaction); 67 } 68 ALLOW_ONLY_INLINE_ALLOCATION(); 69 }; 70 // Maps database names to information about pending transactions 71 typedef WillBeHeapHashMap<String, CoordinationInfo> CoordinationInfoHeapMap; 72 CoordinationInfoHeapMap m_coordinationInfoMap; 73 bool m_isShuttingDown; 74 75 void processPendingTransactions(CoordinationInfo&); 76 }; 77 78 } // namespace WebCore 79 80 #endif // SQLTransactionCoordinator_h 81