/* * Copyright (C) 2010 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef IDBTransactionCoordinator_h #define IDBTransactionCoordinator_h #if ENABLE(INDEXED_DATABASE) #include <memory> #include <wtf/HashMap.h> #include <wtf/ListHashSet.h> #include <wtf/RefPtr.h> namespace WebCore { class IDBTransactionBackend; // Transactions are executed in the order the were created. class IDBTransactionCoordinator { public: IDBTransactionCoordinator(); virtual ~IDBTransactionCoordinator(); // Called by transactions as they start and finish. void didCreateTransaction(IDBTransactionBackend*); void didOpenBackingStoreTransaction(IDBTransactionBackend*); void didStartTransaction(IDBTransactionBackend*); void didFinishTransaction(IDBTransactionBackend*); #ifndef NDEBUG bool isActive(IDBTransactionBackend*); #endif private: void processStartedTransactions(); bool canRunTransaction(IDBTransactionBackend*); // This is just an efficient way to keep references to all transactions. HashMap<IDBTransactionBackend*, RefPtr<IDBTransactionBackend> > m_transactions; // Transactions in different states are grouped below. ListHashSet<IDBTransactionBackend*> m_queuedTransactions; HashSet<IDBTransactionBackend*> m_startedTransactions; }; } // namespace WebCore #endif // ENABLE(INDEXED_DATABASE) #endif // IDBTransactionCoordinator_h