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94 lines
1.9 KiB
C++
94 lines
1.9 KiB
C++
/*
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* ThreadableJob.h - declaration of class ThreadableJob
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*
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* Copyright (c) 2009-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef LMMS_THREADABLE_JOB_H
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#define LMMS_THREADABLE_JOB_H
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#include "lmms_basics.h"
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#include <atomic>
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namespace lmms
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{
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class ThreadableJob
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{
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public:
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enum class ProcessingState : int
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{
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Unstarted,
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Queued,
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InProgress,
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Done
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};
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ThreadableJob() :
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m_state(ProcessingState::Unstarted)
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{
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}
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inline ProcessingState state() const
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{
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return m_state.load();
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}
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inline void reset()
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{
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m_state = ProcessingState::Unstarted;
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}
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inline void queue()
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{
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m_state = ProcessingState::Queued;
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}
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inline void done()
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{
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m_state = ProcessingState::Done;
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}
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void process()
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{
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auto expected = ProcessingState::Queued;
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if (m_state.compare_exchange_strong(expected, ProcessingState::InProgress))
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{
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doProcessing();
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m_state = ProcessingState::Done;
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}
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}
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virtual bool requiresProcessing() const = 0;
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protected:
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virtual void doProcessing() = 0;
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std::atomic<ProcessingState> m_state;
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} ;
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} // namespace lmms
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#endif // LMMS_THREADABLE_JOB_H
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