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/*
* Copyright (C) 2005-2008 by Pieter Palmers
*
* This file is part of FFADO
* FFADO = Free FireWire (pro-)audio drivers for Linux
*
* FFADO is based upon FreeBoB
*
* 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) version 3 of the License.
*
* 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. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "realtimetools.h"
#include "debugmodule/debugmodule.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sched.h>
// needed for clock_nanosleep
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <time.h>
DECLARE_GLOBAL_DEBUG_MODULE;
int set_realtime_priority(unsigned int prio)
{
debugOutput(DEBUG_LEVEL_NORMAL, "Setting thread prio to %u\n", prio);
if (prio > 0) {
struct sched_param schp;
/*
* set the process to realtime privs
*/
memset(&schp, 0, sizeof(schp));
schp.sched_priority = prio;
if (sched_setscheduler(0, SCHED_FIFO, &schp) != 0) {
perror("sched_setscheduler");
return -1;
}
} else {
struct sched_param schp;
/*
* set the process to realtime privs
*/
memset(&schp, 0, sizeof(schp));
schp.sched_priority = 0;
if (sched_setscheduler(0, SCHED_OTHER, &schp) != 0) {
perror("sched_setscheduler");
return -1;
}
}
return 0;
}
void
rt_sleep_relative_usecs(uint64_t usecs) {
//usleep(usecs);
struct timespec ts;
ts.tv_sec = usecs / (1000000LL);
ts.tv_nsec = (usecs % (1000000LL)) * 1000LL;
clock_nanosleep(CLOCK_REALTIME, 0, &ts, NULL);
}
void
rt_sleep_absolute_usecs(uint64_t wake_at_usec) {
struct timespec ts;
ts.tv_sec = wake_at_usec / (1000000LL);
ts.tv_nsec = (wake_at_usec % (1000000LL)) * 1000LL;
clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &ts, NULL);
}
uint64_t rt_gettime_usecs() {
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return (uint64_t)(ts.tv_sec * 1000000LL + ts.tv_nsec / 1000LL);
}
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