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Diffstat (limited to 'Source/WebCore/storage/IDBTransactionCoordinator.cpp')
-rw-r--r-- | Source/WebCore/storage/IDBTransactionCoordinator.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/Source/WebCore/storage/IDBTransactionCoordinator.cpp b/Source/WebCore/storage/IDBTransactionCoordinator.cpp new file mode 100644 index 0000000..f867f42 --- /dev/null +++ b/Source/WebCore/storage/IDBTransactionCoordinator.cpp @@ -0,0 +1,114 @@ +/* + * 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. + */ + +#include "config.h" +#include "IDBTransactionCoordinator.h" + +#if ENABLE(INDEXED_DATABASE) + +#include "IDBDatabaseBackendImpl.h" +#include "IDBObjectStoreBackendInterface.h" +#include "IDBTransactionBackendImpl.h" +#include "SQLiteDatabase.h" +#include "ScriptExecutionContext.h" + +namespace WebCore { + +PassRefPtr<IDBTransactionCoordinator> IDBTransactionCoordinator::create() +{ + return adoptRef(new IDBTransactionCoordinator()); +} + +IDBTransactionCoordinator::IDBTransactionCoordinator() +{ +} + +IDBTransactionCoordinator::~IDBTransactionCoordinator() +{ +} + +void IDBTransactionCoordinator::didCreateTransaction(IDBTransactionBackendImpl* transaction) +{ + ASSERT(!m_transactions.contains(transaction)); + m_transactions.add(transaction, transaction); +} + +void IDBTransactionCoordinator::didStartTransaction(IDBTransactionBackendImpl* transaction) +{ + ASSERT(m_transactions.contains(transaction)); + + m_startedTransactions.add(transaction); + processStartedTransactions(); +} + +void IDBTransactionCoordinator::didFinishTransaction(IDBTransactionBackendImpl* transaction) +{ + ASSERT(m_transactions.contains(transaction)); + + if (m_startedTransactions.contains(transaction)) { + ASSERT(!m_runningTransactions.contains(transaction)); + m_startedTransactions.remove(transaction); + } else if (m_runningTransactions.contains(transaction)) + m_runningTransactions.remove(transaction); + + m_transactions.remove(transaction); + + processStartedTransactions(); +} + +#ifndef NDEBUG +// Verifies internal consistiency while returning whether anything is found. +bool IDBTransactionCoordinator::isActive(IDBTransactionBackendImpl* transaction) +{ + bool found = false; + if (m_startedTransactions.contains(transaction)) + found = true; + if (m_runningTransactions.contains(transaction)) { + ASSERT(!found); + found = true; + } + ASSERT(found == m_transactions.contains(transaction)); + return found; +} +#endif + +void IDBTransactionCoordinator::processStartedTransactions() +{ + // FIXME: For now, we only allow one transaction to run at a time. + if (!m_runningTransactions.isEmpty()) + return; + + if (m_startedTransactions.isEmpty()) + return; + + IDBTransactionBackendImpl* transaction = *m_startedTransactions.begin(); + m_startedTransactions.remove(transaction); + m_runningTransactions.add(transaction); + transaction->run(); +} + +}; + +#endif // ENABLE(INDEXED_DATABASE) |