/usr/include/soprano/mutexmodel.h is in libsoprano-dev 2.7.6+dfsg.1-2wheezy1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* This file is part of Soprano Project.
*
* Copyright (C) 2007-2008 Sebastian Trueg <trueg@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _SOPRANO_MUTEX_MODEL_H_
#define _SOPRANO_MUTEX_MODEL_H_
#include "filtermodel.h"
#include "soprano_export.h"
namespace Soprano {
namespace Util {
class MutexIteratorBase;
/**
* \class MutexModel mutexmodel.h Soprano/Util/MutexModel
*
* \brief Protect a Model for multiple calls in multi-threaded
* applications.
*
* In most cases one does not need to use this FilterModel since Models
* created by Soprano::createModel and Soprano::Backend::createModel
* are thread-safe. It may, however, come in handy for custom models.
*
* \author Sebastian Trueg <trueg@kde.org>
*/
class SOPRANO_EXPORT MutexModel : public FilterModel
{
Q_OBJECT
public:
enum ProtectionMode {
/**
* In PlainMultiThreading mode only one action can be performed
* at the same time. Calls block until the previous call is done.
*
* \warning In this mode nesting iterators will result in a deadlock.
*/
PlainMultiThreading,
/**
* In ReadWriteMultiThreading mode multiple read operations
* can be performed at the same time but only one write
* operation.
*
* In general write operations take precedence over read
* operations when locking. However, the same thread can perform
* nested read locks an arbitrary number of times.
*/
ReadWriteMultiThreading,
/**
* \deprecated This was a buggy mode which was impossible to fix.
* Use Soprano::Util::AsyncModel instead.
*/
ReadWriteSingleThreading
};
/**
* Create a new MutexModel.
*
* \param mode The mode to use.
* \param parent The parent Model to forward
* the actual calls to.
*/
MutexModel( ProtectionMode mode, Model* parent = 0 );
/**
* Destructor.
*/
~MutexModel();
Error::ErrorCode addStatement( const Statement &statement );
Error::ErrorCode removeStatement( const Statement &statement );
Error::ErrorCode removeAllStatements( const Statement &statement );
StatementIterator listStatements( const Statement &partial ) const;
NodeIterator listContexts() const;
QueryResultIterator executeQuery( const QString& query,
Query::QueryLanguage language,
const QString& userQueryLanguage = QString() ) const;
bool containsStatement( const Statement &statement ) const;
bool containsAnyStatement( const Statement &statement ) const;
bool isEmpty() const;
int statementCount() const;
using FilterModel::addStatement;
using FilterModel::removeStatement;
using FilterModel::removeAllStatements;
using FilterModel::listStatements;
using FilterModel::containsStatement;
using FilterModel::containsAnyStatement;
private:
void removeIterator( MutexIteratorBase* it ) const;
class Private;
Private* const d;
friend class MutexIteratorBase;
};
}
}
#endif
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