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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
* Copyright (C) 2013 Apple 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 SQLTransactionCoordinator_h
#define SQLTransactionCoordinator_h
#include "base/macros.h"
#include "platform/heap/Handle.h"
#include "platform/wtf/Deque.h"
#include "platform/wtf/HashMap.h"
#include "platform/wtf/HashSet.h"
#include "platform/wtf/text/StringHash.h"
namespace blink {
class SQLTransactionBackend;
class SQLTransactionCoordinator
: public GarbageCollectedFinalized<SQLTransactionCoordinator> {
public:
SQLTransactionCoordinator();
void Trace(blink::Visitor*);
void AcquireLock(SQLTransactionBackend*);
void ReleaseLock(SQLTransactionBackend*);
void Shutdown();
private:
typedef Deque<CrossThreadPersistent<SQLTransactionBackend>> TransactionsQueue;
struct CoordinationInfo {
DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
public:
TransactionsQueue pending_transactions;
HashSet<CrossThreadPersistent<SQLTransactionBackend>>
active_read_transactions;
CrossThreadPersistent<SQLTransactionBackend> active_write_transaction;
};
// Maps database names to information about pending transactions
typedef HashMap<String, CoordinationInfo> CoordinationInfoHeapMap;
CoordinationInfoHeapMap coordination_info_map_;
bool is_shutting_down_;
void ProcessPendingTransactions(CoordinationInfo&);
DISALLOW_COPY_AND_ASSIGN(SQLTransactionCoordinator);
};
} // namespace blink
#endif // SQLTransactionCoordinator_h