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/*
* ThreadableJob.h - declaration of class ThreadableJob
*
* Copyright (c) 2009-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#ifndef THREADABLE_JOB_H
#define THREADABLE_JOB_H
#include "AtomicInt.h"
#include "lmms_basics.h"
class ThreadableJob
{
public:
enum ProcessingState
{
Unstarted,
Queued,
InProgress,
Done
};
ThreadableJob() :
m_state( ThreadableJob::Unstarted )
{
}
inline ProcessingState state() const
{
return static_cast<ProcessingState>( (int) m_state );
}
inline void reset()
{
m_state = Unstarted;
}
inline void queue()
{
m_state = Queued;
}
inline void done()
{
m_state = Done;
}
void process()
{
if( m_state.testAndSetOrdered( Queued, InProgress ) )
{
doProcessing();
m_state = Done;
}
}
virtual bool requiresProcessing() const = 0;
protected:
virtual void doProcessing() = 0;
AtomicInt m_state;
} ;
#endif
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