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#if ENABLE(SQL_DATABASE) 36 37#include <wtf/Deque.h> 38#include <wtf/HashMap.h> 39#include <wtf/HashSet.h> 40#include <wtf/RefPtr.h> 41#include <wtf/text/StringHash.h> 42 43namespace WebCore { 44 45class SQLTransactionBackend; 46 47class SQLTransactionCoordinator { 48 WTF_MAKE_NONCOPYABLE(SQLTransactionCoordinator); WTF_MAKE_FAST_ALLOCATED; 49public: 50 SQLTransactionCoordinator(); 51 void acquireLock(SQLTransactionBackend*); 52 void releaseLock(SQLTransactionBackend*); 53 void shutdown(); 54private: 55 typedef Deque<RefPtr<SQLTransactionBackend> > TransactionsQueue; 56 struct CoordinationInfo { 57 TransactionsQueue pendingTransactions; 58 HashSet<RefPtr<SQLTransactionBackend> > activeReadTransactions; 59 RefPtr<SQLTransactionBackend> activeWriteTransaction; 60 }; 61 // Maps database names to information about pending transactions 62 typedef HashMap<String, CoordinationInfo> CoordinationInfoMap; 63 CoordinationInfoMap m_coordinationInfoMap; 64 bool m_isShuttingDown; 65 66 void processPendingTransactions(CoordinationInfo&); 67}; 68 69} // namespace WebCore 70 71#endif // ENABLE(SQL_DATABASE) 72 73#endif // SQLTransactionCoordinator_h 74