57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
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/*
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* Copyright (C) 2014 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU 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 License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __libbackend_alsa_rthread_h__
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#define __libbackend_alsa_rthread_h__
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#include <pthread.h>
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#include <sched.h>
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static int
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_realtime_pthread_create (
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int policy, int priority,
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pthread_t *thread,
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void *(*start_routine) (void *),
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void *arg)
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{
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int rv;
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pthread_attr_t attr;
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struct sched_param parm;
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const size_t stacksize = 100000;
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const int p_min = sched_get_priority_min (policy);
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const int p_max = sched_get_priority_max (policy);
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priority += p_max;
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if (priority > p_max) priority = p_max;
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if (priority < p_min) priority = p_min;
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parm.sched_priority = priority;
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pthread_attr_init (&attr);
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pthread_attr_setschedpolicy (&attr, policy);
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pthread_attr_setschedparam (&attr, &parm);
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pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
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pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
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pthread_attr_setstacksize (&attr, stacksize);
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rv = pthread_create (thread, &attr, start_routine, arg);
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pthread_attr_destroy (&attr);
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return rv;
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}
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#endif
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