| /* |
| * 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. |
| */ |
| |
| #ifndef IDBTransactionBackendImpl_h |
| #define IDBTransactionBackendImpl_h |
| |
| #include "core/platform/Timer.h" |
| #include "modules/indexeddb/IDBBackingStore.h" |
| #include "modules/indexeddb/IDBDatabaseBackendInterface.h" |
| #include "modules/indexeddb/IDBDatabaseError.h" |
| #include "wtf/Deque.h" |
| #include "wtf/HashSet.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace WebCore { |
| |
| class IDBDatabaseBackendImpl; |
| class IDBCursorBackendImpl; |
| class IDBDatabaseCallbacks; |
| |
| class IDBTransactionBackendImpl : public RefCounted<IDBTransactionBackendImpl> { |
| public: |
| static PassRefPtr<IDBTransactionBackendImpl> create(int64_t transactionId, PassRefPtr<IDBDatabaseCallbacks>, const Vector<int64_t>&, IndexedDB::TransactionMode, IDBDatabaseBackendImpl*); |
| virtual ~IDBTransactionBackendImpl(); |
| |
| virtual void abort(); |
| void commit(); |
| |
| class Operation { |
| public: |
| virtual ~Operation() { } |
| virtual void perform(IDBTransactionBackendImpl*) = 0; |
| }; |
| |
| void abort(PassRefPtr<IDBDatabaseError>); |
| void run(); |
| IndexedDB::TransactionMode mode() const { return m_mode; } |
| const HashSet<int64_t>& scope() const { return m_objectStoreIds; } |
| void scheduleTask(PassOwnPtr<Operation> task, PassOwnPtr<Operation> abortTask = nullptr) { scheduleTask(IDBDatabaseBackendInterface::NormalTask, task, abortTask); } |
| void scheduleTask(IDBDatabaseBackendInterface::TaskType, PassOwnPtr<Operation>, PassOwnPtr<Operation> abortTask = nullptr); |
| void registerOpenCursor(IDBCursorBackendImpl*); |
| void unregisterOpenCursor(IDBCursorBackendImpl*); |
| void addPreemptiveEvent() { m_pendingPreemptiveEvents++; } |
| void didCompletePreemptiveEvent() { m_pendingPreemptiveEvents--; ASSERT(m_pendingPreemptiveEvents >= 0); } |
| IDBBackingStore::Transaction* backingStoreTransaction() { return &m_transaction; } |
| int64_t id() const { return m_id; } |
| |
| IDBDatabaseBackendImpl* database() const { return m_database.get(); } |
| IDBDatabaseCallbacks* connection() const { return m_callbacks.get(); } |
| |
| private: |
| IDBTransactionBackendImpl(int64_t id, PassRefPtr<IDBDatabaseCallbacks>, const HashSet<int64_t>& objectStoreIds, IndexedDB::TransactionMode, IDBDatabaseBackendImpl*); |
| |
| enum State { |
| Unused, // Created, but no tasks yet. |
| StartPending, // Enqueued tasks, but backing store transaction not yet started. |
| Running, // Backing store transaction started but not yet finished. |
| Finished, // Either aborted or committed. |
| }; |
| |
| void start(); |
| |
| bool isTaskQueueEmpty() const; |
| bool hasPendingTasks() const; |
| |
| void taskTimerFired(Timer<IDBTransactionBackendImpl>*); |
| void closeOpenCursors(); |
| |
| const int64_t m_id; |
| const HashSet<int64_t> m_objectStoreIds; |
| const IndexedDB::TransactionMode m_mode; |
| |
| State m_state; |
| bool m_commitPending; |
| RefPtr<IDBDatabaseCallbacks> m_callbacks; |
| RefPtr<IDBDatabaseBackendImpl> m_database; |
| |
| typedef Deque<OwnPtr<Operation> > TaskQueue; |
| TaskQueue m_taskQueue; |
| TaskQueue m_preemptiveTaskQueue; |
| TaskQueue m_abortTaskQueue; |
| |
| IDBBackingStore::Transaction m_transaction; |
| |
| // FIXME: delete the timer once we have threads instead. |
| Timer<IDBTransactionBackendImpl> m_taskTimer; |
| int m_pendingPreemptiveEvents; |
| |
| HashSet<IDBCursorBackendImpl*> m_openCursors; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // IDBTransactionBackendImpl_h |