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/*
* 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 "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)
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