forked from enlightenment/efl
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* EINA - EFL data type library
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* Copyright (C) 2010 ProFUSION embedded systems
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <pthread.h>
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#ifdef __linux__
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# include <sched.h>
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# include <sys/time.h>
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# include <sys/resource.h>
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# include <errno.h>
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#endif
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#include "eina_sched.h"
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#include "eina_log.h"
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#define RTNICENESS 1
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#define NICENESS 5
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EAPI void
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eina_sched_prio_drop(void)
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{
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struct sched_param param;
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int pol, ret;
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pthread_t pthread_id;
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pthread_id = pthread_self();
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ret = pthread_getschedparam(pthread_id, &pol, ¶m);
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if (ret)
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{
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EINA_LOG_ERR("Unable to query sched parameters");
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return;
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}
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if (EINA_UNLIKELY(pol == SCHED_RR || pol == SCHED_FIFO))
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{
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param.sched_priority -= RTNICENESS;
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/* We don't change the policy */
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if (param.sched_priority < 1)
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{
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EINA_LOG_INFO("RT prio < 1, setting to 1 instead");
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param.sched_priority = 1;
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}
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pthread_setschedparam(pthread_id, pol, ¶m);
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}
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# ifdef __linux__
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else
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{
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int prio;
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errno = 0;
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prio = getpriority(PRIO_PROCESS, 0);
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if (errno == 0)
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{
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prio += NICENESS;
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if (prio > 19)
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{
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EINA_LOG_INFO("Max niceness reached; keeping max (19)");
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prio = 19;
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}
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setpriority(PRIO_PROCESS, 0, prio);
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}
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}
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# endif
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}
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