/*
* 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.
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* 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
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*/
#ifndef SQLTransactionCoordinator_h
#define SQLTransactionCoordinator_h
#include "heap/Handle.h"
#include "wtf/Deque.h"
#include "wtf/HashMap.h"
#include "wtf/HashSet.h"
#include "wtf/RefPtr.h"
#include "wtf/text/StringHash.h"
namespace WebCore {
class SQLTransactionBackend;
class SQLTransactionCoordinator : public NoBaseWillBeGarbageCollected<SQLTransactionCoordinator> {
WTF_MAKE_NONCOPYABLE(SQLTransactionCoordinator);
WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
SQLTransactionCoordinator();
void trace(Visitor*);
void acquireLock(SQLTransactionBackend*);
void releaseLock(SQLTransactionBackend*);
void shutdown();
private:
typedef Deque<RefPtrWillBeMember<SQLTransactionBackend> > TransactionsQueue;
struct CoordinationInfo {
TransactionsQueue pendingTransactions;
WillBeHeapHashSet<RefPtrWillBeMember<SQLTransactionBackend> > activeReadTransactions;
RefPtrWillBeMember<SQLTransactionBackend> activeWriteTransaction;
void trace(Visitor* visitor)
{
visitor->trace(pendingTransactions);
visitor->trace(activeReadTransactions);
visitor->trace(activeWriteTransaction);
}
ALLOW_ONLY_INLINE_ALLOCATION();
};
// Maps database names to information about pending transactions
typedef WillBeHeapHashMap<String, CoordinationInfo> CoordinationInfoHeapMap;
CoordinationInfoHeapMap m_coordinationInfoMap;
bool m_isShuttingDown;
void processPendingTransactions(CoordinationInfo&);
};
} // namespace WebCore
#endif // SQLTransactionCoordinator_h