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/*
* Specify process for soft realtime scheduling treatment.
* $Id$
* Copyright (c) 1997 by Tycho Softworks.
* For conditions of distribution and reuse see product license.
*/
#include <proc/process.h>
#include <std/time.h>
#ifndef SYS_RESOURCE_H_MISSING
#include <sys/resource.h>
#endif
#ifndef SETPRIORITY_F_MISSING
int priority(int pri)
{
#ifdef _POSIX_PRIORITY_SCHEDULING
#define _P __P
#include <sched.h>
struct sched_param p;
#endif
int newpri = getpriority(PRIO_PROCESS, 0) - pri - 1;
if(setpriority(PRIO_PROCESS, 0, newpri))
return -1;
#ifdef _POSIX_MEMLOCK
#include <linux/mman.h>
if(mlockall(MCL_CURRENT | MCL_FUTURE))
return -1;
#endif
#ifdef _POSIX_PRIORITY_SCHEDULING
if(pri > 0)
{
p.sched_priority = sched_get_priority_min(SCHED_RR) + pri - 1;
if(sched_setscheduler(0, SCHED_RR, &p))
return -1;
}
#endif
return 0;
}
#else
int priority(int priority)
{
return nice(- priority - 1);
}
#endif
#ifdef _POSIX_PRIORITY_SCHEDULING
#include <sched.h>
void yield(void)
{
sched_yield();
}
#else
void yield(void)
{
sleep(0);
}
#endif
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