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/* -*- c++ -*- */
/*
* Copyright 2006,2007 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gr_realtime.h>
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdio.h>
#if defined(HAVE_SCHED_SETSCHEDULER)
gr_rt_status_t
gr_enable_realtime_scheduling()
{
int policy = SCHED_FIFO;
int pri = (sched_get_priority_max (policy) + sched_get_priority_min (policy)) / 2;
int pid = 0; // this process
struct sched_param param;
memset(¶m, 0, sizeof(param));
param.sched_priority = pri;
int result = sched_setscheduler(pid, policy, ¶m);
if (result != 0){
if (errno == EPERM)
return RT_NO_PRIVS;
else {
perror ("sched_setscheduler: failed to set real time priority");
return RT_OTHER_ERROR;
}
}
//printf("SCHED_FIFO enabled with priority = %d\n", pri);
return RT_OK;
}
#elif defined(HAVE_PTHREAD_SETSCHEDPARAM)
#include <pthread.h>
#include <stdio.h>
gr_rt_status_t
gr_enable_realtime_scheduling()
{
int policy = SCHED_FIFO;
int pri = (sched_get_priority_max (policy) +
sched_get_priority_min (policy)) / 2;
pthread_t this_thread = pthread_self (); // this process
struct sched_param param;
memset (¶m, 0, sizeof (param));
param.sched_priority = pri;
int result = pthread_setschedparam (this_thread, policy, ¶m);
if (result != 0) {
if (errno == EPERM)
return RT_NO_PRIVS;
else {
perror ("pthread_setschedparam: failed to set real time priority");
return RT_OTHER_ERROR;
}
}
//printf("SCHED_FIFO enabled with priority = %d\n", pri);
return RT_OK;
}
// #elif // could try negative niceness
#else
gr_rt_status_t
gr_enable_realtime_scheduling()
{
return RT_NOT_IMPLEMENTED;
}
#endif
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