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/*
* MixerWorkerThread.h - declaration of class MixerWorkerThread
*
* 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 MIXER_WORKER_THREAD_H
#define MIXER_WORKER_THREAD_H
#include <AtomicInt.h>
#include <QtCore/QAtomicPointer>
#include <QtCore/QThread>
class QWaitCondition;
class Mixer;
class ThreadableJob;
class MixerWorkerThread : public QThread
{
public:
// internal representation of the job queue - all functions are thread-safe
class JobQueue
{
public:
enum OperationMode
{
Static, // no jobs added while processing queue
Dynamic // jobs can be added while processing queue
} ;
JobQueue() :
m_items(),
m_writeIndex( 0 ),
m_itemsDone( 0 ),
m_opMode( Static )
{
}
void reset( OperationMode _opMode );
void addJob( ThreadableJob * _job );
void run();
void wait();
private:
#define JOB_QUEUE_SIZE 8192
QAtomicPointer<ThreadableJob> m_items[JOB_QUEUE_SIZE];
AtomicInt m_writeIndex;
AtomicInt m_itemsDone;
OperationMode m_opMode;
} ;
MixerWorkerThread( Mixer* mixer );
virtual ~MixerWorkerThread();
virtual void quit();
static void resetJobQueue( JobQueue::OperationMode _opMode =
JobQueue::Static )
{
globalJobQueue.reset( _opMode );
}
static void addJob( ThreadableJob * _job )
{
globalJobQueue.addJob( _job );
}
// a convenient helper function allowing to pass a container with pointers
// to ThreadableJob objects
template<typename T>
static void fillJobQueue( const T & _vec,
JobQueue::OperationMode _opMode = JobQueue::Static )
{
resetJobQueue( _opMode );
for( typename T::ConstIterator it = _vec.begin(); it != _vec.end(); ++it )
{
addJob( *it );
}
}
static void startAndWaitForJobs();
private:
virtual void run();
static JobQueue globalJobQueue;
static QWaitCondition * queueReadyWaitCond;
static QList<MixerWorkerThread *> workerThreads;
volatile bool m_quit;
} ;
#endif
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