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/*
* 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 DatabaseThread_h
#define DatabaseThread_h
#include "platform/WebThreadSupportingGC.h"
#include "platform/heap/Handle.h"
#include "wtf/HashMap.h"
#include "wtf/ThreadingPrimitives.h"
#include <memory>
namespace blink {
class Database;
class DatabaseTask;
class SQLTransactionClient;
class SQLTransactionCoordinator;
class WaitableEvent;
class DatabaseThread : public GarbageCollectedFinalized<DatabaseThread> {
public:
static DatabaseThread* create() { return new DatabaseThread; }
~DatabaseThread();
DECLARE_TRACE();
// Callable only from the main thread.
void start();
void terminate();
// Callable from the main thread or the database thread.
void scheduleTask(std::unique_ptr<DatabaseTask>);
bool isDatabaseThread() const;
// Callable only from the database thread.
void recordDatabaseOpen(Database*);
void recordDatabaseClosed(Database*);
bool isDatabaseOpen(Database*);
SQLTransactionClient* transactionClient() {
return m_transactionClient.get();
}
SQLTransactionCoordinator* transactionCoordinator() {
return m_transactionCoordinator.get();
}
private:
DatabaseThread();
void setupDatabaseThread();
void cleanupDatabaseThread();
void cleanupDatabaseThreadCompleted();
std::unique_ptr<WebThreadSupportingGC> m_thread;
// This set keeps track of the open databases that have been used on this
// thread. This must be updated in the database thread though it is
// constructed and destructed in the context thread.
HashSet<CrossThreadPersistent<Database>> m_openDatabaseSet;
std::unique_ptr<SQLTransactionClient> m_transactionClient;
CrossThreadPersistent<SQLTransactionCoordinator> m_transactionCoordinator;
WaitableEvent* m_cleanupSync;
Mutex m_terminationRequestedMutex;
bool m_terminationRequested;
};
} // namespace blink
#endif // DatabaseThread_h
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