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Diffstat (limited to 'Source/WebCore/storage/DatabaseTask.h')
-rw-r--r-- | Source/WebCore/storage/DatabaseTask.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/Source/WebCore/storage/DatabaseTask.h b/Source/WebCore/storage/DatabaseTask.h new file mode 100644 index 0000000..b61e465 --- /dev/null +++ b/Source/WebCore/storage/DatabaseTask.h @@ -0,0 +1,175 @@ +/* + * Copyright (C) 2007, 2008 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: + * + * 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. + * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 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 DatabaseTask_h +#define DatabaseTask_h + +#if ENABLE(DATABASE) +#include "Database.h" +#include "ExceptionCode.h" +#include "PlatformString.h" +#include "SQLTransaction.h" +#include <wtf/OwnPtr.h> +#include <wtf/PassOwnPtr.h> +#include <wtf/PassRefPtr.h> +#include <wtf/Threading.h> +#include <wtf/Vector.h> + +namespace WebCore { + +// Can be used to wait until DatabaseTask is completed. +// Has to be passed into DatabaseTask::create to be associated with the task. +class DatabaseTaskSynchronizer : public Noncopyable { +public: + DatabaseTaskSynchronizer(); + + // Called from main thread to wait until task is completed. + void waitForTaskCompletion(); + + // Called by the task. + void taskCompleted(); + +#ifndef NDEBUG + bool hasCheckedForTermination() const { return m_hasCheckedForTermination; } + void setHasCheckedForTermination() { m_hasCheckedForTermination = true; } +#endif + +private: + bool m_taskCompleted; + Mutex m_synchronousMutex; + ThreadCondition m_synchronousCondition; +#ifndef NDEBUG + bool m_hasCheckedForTermination; +#endif +}; + +class DatabaseTask : public Noncopyable { +public: + virtual ~DatabaseTask(); + + void performTask(); + + Database* database() const { return m_database; } +#ifndef NDEBUG + bool hasSynchronizer() const { return m_synchronizer; } + bool hasCheckedForTermination() const { return m_synchronizer->hasCheckedForTermination(); } +#endif + +protected: + DatabaseTask(Database*, DatabaseTaskSynchronizer*); + +private: + virtual void doPerformTask() = 0; + + Database* m_database; + DatabaseTaskSynchronizer* m_synchronizer; + +#ifndef NDEBUG + virtual const char* debugTaskName() const = 0; + bool m_complete; +#endif +}; + +class Database::DatabaseOpenTask : public DatabaseTask { +public: + static PassOwnPtr<DatabaseOpenTask> create(Database* db, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, ExceptionCode& code, bool& success) + { + return adoptPtr(new DatabaseOpenTask(db, setVersionInNewDatabase, synchronizer, code, success)); + } + +private: + DatabaseOpenTask(Database*, bool setVersionInNewDatabase, DatabaseTaskSynchronizer*, ExceptionCode&, bool& success); + + virtual void doPerformTask(); +#ifndef NDEBUG + virtual const char* debugTaskName() const; +#endif + + bool m_setVersionInNewDatabase; + ExceptionCode& m_code; + bool& m_success; +}; + +class Database::DatabaseCloseTask : public DatabaseTask { +public: + static PassOwnPtr<DatabaseCloseTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer) + { + return adoptPtr(new DatabaseCloseTask(db, synchronizer)); + } + +private: + DatabaseCloseTask(Database*, DatabaseTaskSynchronizer*); + + virtual void doPerformTask(); +#ifndef NDEBUG + virtual const char* debugTaskName() const; +#endif +}; + +class Database::DatabaseTransactionTask : public DatabaseTask { +public: + // Transaction task is never synchronous, so no 'synchronizer' parameter. + static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransaction> transaction) + { + return adoptPtr(new DatabaseTransactionTask(transaction)); + } + + SQLTransaction* transaction() const { return m_transaction.get(); } + +private: + DatabaseTransactionTask(PassRefPtr<SQLTransaction>); + + virtual void doPerformTask(); +#ifndef NDEBUG + virtual const char* debugTaskName() const; +#endif + + RefPtr<SQLTransaction> m_transaction; +}; + +class Database::DatabaseTableNamesTask : public DatabaseTask { +public: + static PassOwnPtr<DatabaseTableNamesTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names) + { + return adoptPtr(new DatabaseTableNamesTask(db, synchronizer, names)); + } + +private: + DatabaseTableNamesTask(Database*, DatabaseTaskSynchronizer*, Vector<String>& names); + + virtual void doPerformTask(); +#ifndef NDEBUG + virtual const char* debugTaskName() const; +#endif + + Vector<String>& m_tableNames; +}; + +} // namespace WebCore + +#endif // ENABLE(DATABASE) +#endif // DatabaseTask_h |