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26 #ifndef IDBTransactionCoordinator_h
27 #define IDBTransactionCoordinator_h
29 #if ENABLE(INDEXED_DATABASE)
31 #include "DOMStringList.h"
32 #include "IDBTransactionBackendInterface.h"
33 #include <wtf/ListHashSet.h>
34 #include <wtf/RefPtr.h>
38 class IDBTransactionBackendImpl;
39 class IDBTransactionCallbacks;
40 class IDBDatabaseBackendImpl;
42 // Transactions are executed in the order the were created.
43 class IDBTransactionCoordinator : public RefCounted<IDBTransactionCoordinator> {
45 static PassRefPtr<IDBTransactionCoordinator> create();
46 virtual ~IDBTransactionCoordinator();
48 // Called by transactions as they start and finish.
49 void didCreateTransaction(IDBTransactionBackendImpl*);
50 void didStartTransaction(IDBTransactionBackendImpl*);
51 void didFinishTransaction(IDBTransactionBackendImpl*);
54 bool isActive(IDBTransactionBackendImpl*);
58 IDBTransactionCoordinator();
60 void processStartedTransactions();
62 // This is just an efficient way to keep references to all transactions.
63 HashMap<IDBTransactionBackendImpl*, RefPtr<IDBTransactionBackendImpl> > m_transactions;
64 // Transactions in different states are grouped below.
65 ListHashSet<IDBTransactionBackendImpl*> m_startedTransactions;
66 HashSet<IDBTransactionBackendImpl*> m_runningTransactions;
69 } // namespace WebCore
71 #endif // ENABLE(INDEXED_DATABASE)
73 #endif // IDBTransactionCoordinator_h