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* Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef DatabaseTask_h
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#define DatabaseTask_h
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#if ENABLE(SQL_DATABASE)
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#include "SQLTransaction.h"
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#include <wtf/OwnPtr.h>
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#include <wtf/PassOwnPtr.h>
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#include <wtf/PassRefPtr.h>
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#include <wtf/Threading.h>
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#include <wtf/Vector.h>
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#include <wtf/text/WTFString.h>
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typedef int ExceptionCode;
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// Can be used to wait until DatabaseTask is completed.
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// Has to be passed into DatabaseTask::create to be associated with the task.
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class DatabaseTaskSynchronizer {
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WTF_MAKE_NONCOPYABLE(DatabaseTaskSynchronizer);
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DatabaseTaskSynchronizer();
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// Called from main thread to wait until task is completed.
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void waitForTaskCompletion();
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// Called by the task.
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bool hasCheckedForTermination() const { return m_hasCheckedForTermination; }
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void setHasCheckedForTermination() { m_hasCheckedForTermination = true; }
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Mutex m_synchronousMutex;
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ThreadCondition m_synchronousCondition;
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bool m_hasCheckedForTermination;
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WTF_MAKE_NONCOPYABLE(DatabaseTask); WTF_MAKE_FAST_ALLOCATED;
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virtual ~DatabaseTask();
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Database* database() const { return m_database; }
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bool hasSynchronizer() const { return m_synchronizer; }
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bool hasCheckedForTermination() const { return m_synchronizer->hasCheckedForTermination(); }
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DatabaseTask(Database*, DatabaseTaskSynchronizer*);
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virtual void doPerformTask() = 0;
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DatabaseTaskSynchronizer* m_synchronizer;
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virtual const char* debugTaskName() const = 0;
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class Database::DatabaseOpenTask : public DatabaseTask {
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static PassOwnPtr<DatabaseOpenTask> create(Database* db, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, ExceptionCode& code, String& errorMessage, bool& success)
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return adoptPtr(new DatabaseOpenTask(db, setVersionInNewDatabase, synchronizer, code, errorMessage, success));
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DatabaseOpenTask(Database*, bool setVersionInNewDatabase, DatabaseTaskSynchronizer*, ExceptionCode&, String& errorMessage, bool& success);
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virtual void doPerformTask();
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virtual const char* debugTaskName() const;
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bool m_setVersionInNewDatabase;
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ExceptionCode& m_code;
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String& m_errorMessage;
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class Database::DatabaseCloseTask : public DatabaseTask {
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static PassOwnPtr<DatabaseCloseTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer)
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return adoptPtr(new DatabaseCloseTask(db, synchronizer));
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DatabaseCloseTask(Database*, DatabaseTaskSynchronizer*);
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virtual void doPerformTask();
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virtual const char* debugTaskName() const;
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class Database::DatabaseTransactionTask : public DatabaseTask {
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// Transaction task is never synchronous, so no 'synchronizer' parameter.
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static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransaction> transaction)
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return adoptPtr(new DatabaseTransactionTask(transaction));
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SQLTransaction* transaction() const { return m_transaction.get(); }
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explicit DatabaseTransactionTask(PassRefPtr<SQLTransaction>);
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virtual void doPerformTask();
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virtual const char* debugTaskName() const;
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RefPtr<SQLTransaction> m_transaction;
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class Database::DatabaseTableNamesTask : public DatabaseTask {
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static PassOwnPtr<DatabaseTableNamesTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
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return adoptPtr(new DatabaseTableNamesTask(db, synchronizer, names));
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DatabaseTableNamesTask(Database*, DatabaseTaskSynchronizer*, Vector<String>& names);
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virtual void doPerformTask();
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virtual const char* debugTaskName() const;
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Vector<String>& m_tableNames;
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} // namespace WebCore
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#endif // ENABLE(SQL_DATABASE)
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#endif // DatabaseTask_h