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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 <memory>
#include "platform/WebThreadSupportingGC.h"
#include "platform/heap/Handle.h"
#include "platform/wtf/HashMap.h"
#include "platform/wtf/ThreadingPrimitives.h"
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();
void Trace(blink::Visitor*);
// 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 transaction_client_.get();
}
SQLTransactionCoordinator* TransactionCoordinator() {
return transaction_coordinator_.Get();
}
private:
DatabaseThread();
void SetupDatabaseThread();
void CleanupDatabaseThread();
void CleanupDatabaseThreadCompleted();
std::unique_ptr<WebThreadSupportingGC> 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>> open_database_set_;
std::unique_ptr<SQLTransactionClient> transaction_client_;
CrossThreadPersistent<SQLTransactionCoordinator> transaction_coordinator_;
WaitableEvent* cleanup_sync_;
Mutex termination_requested_mutex_;
bool termination_requested_;
};
} // namespace blink
#endif // DatabaseThread_h