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/*
* Copyright (C) 2007, 2008, 2013, 2015 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 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.
*/
#pragma once
#include "ExceptionOr.h"
#include <wtf/Condition.h>
#include <wtf/Forward.h>
#include <wtf/Lock.h>
namespace WebCore {
class Database;
class SQLTransaction;
// Can be used to wait until DatabaseTask is completed.
// Has to be passed into DatabaseTask::create to be associated with the task.
class DatabaseTaskSynchronizer {
WTF_MAKE_NONCOPYABLE(DatabaseTaskSynchronizer);
public:
DatabaseTaskSynchronizer();
// Called from main thread to wait until task is completed.
void waitForTaskCompletion();
// Called by the task.
void taskCompleted();
#if ASSERT_ENABLED
bool hasCheckedForTermination() const { return m_hasCheckedForTermination; }
void setHasCheckedForTermination() { m_hasCheckedForTermination = true; }
#endif
private:
bool m_taskCompleted WTF_GUARDED_BY_LOCK(m_synchronousLock) { false };
Lock m_synchronousLock;
Condition m_synchronousCondition;
#if ASSERT_ENABLED
bool m_hasCheckedForTermination { false };
#endif
};
class DatabaseTask {
WTF_MAKE_FAST_ALLOCATED;
public:
virtual ~DatabaseTask();
void performTask();
Database& database() const { return m_database; }
#if ASSERT_ENABLED
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;
#if !LOG_DISABLED
virtual const char* debugTaskName() const = 0;
#endif
#if ASSERT_ENABLED
bool m_complete { false };
#endif
};
class DatabaseOpenTask final : public DatabaseTask {
public:
DatabaseOpenTask(Database&, bool setVersionInNewDatabase, DatabaseTaskSynchronizer&, ExceptionOr<void>& result);
private:
void doPerformTask() final;
#if !LOG_DISABLED
const char* debugTaskName() const final;
#endif
bool m_setVersionInNewDatabase;
ExceptionOr<void>& m_result;
};
class DatabaseCloseTask final : public DatabaseTask {
public:
DatabaseCloseTask(Database&, DatabaseTaskSynchronizer&);
private:
void doPerformTask() final;
#if !LOG_DISABLED
const char* debugTaskName() const final;
#endif
};
class DatabaseTransactionTask final : public DatabaseTask {
public:
explicit DatabaseTransactionTask(RefPtr<SQLTransaction>&&);
virtual ~DatabaseTransactionTask();
SQLTransaction* transaction() const { return m_transaction.get(); }
private:
void doPerformTask() final;
#if !LOG_DISABLED
const char* debugTaskName() const final;
#endif
RefPtr<SQLTransaction> m_transaction;
bool m_didPerformTask;
};
class DatabaseTableNamesTask final : public DatabaseTask {
public:
DatabaseTableNamesTask(Database&, DatabaseTaskSynchronizer&, Vector<String>& result);
private:
void doPerformTask() final;
#if !LOG_DISABLED
const char* debugTaskName() const override;
#endif
Vector<String>& m_result;
};
} // namespace WebCore
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