cosmopolitan/libc/thread/pthread_setschedparam_freebsd.c

48 lines
2.8 KiB
C
Raw Normal View History

2022-09-09 18:30:33 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2022 Justine Alexandra Roberts Tunney
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
*/
#include "libc/calls/struct/sched_param.h"
#include "libc/sysv/consts/sched.h"
#include "libc/thread/freebsd.internal.h"
#include "libc/thread/posixthread.internal.h"
#define RTP_SET_FREEBSD 1
#define PRI_REALTIME_FREEBSD 2
#define RTP_PRIO_MAX_FREEBSD 31
#define PRI_FIFO_BIT_FREEBSD 8
#define PRI_FIFO_FREEBSD (PRI_REALTIME_FREEBSD | PRI_FIFO_BIT_FREEBSD)
#define PRI_TIMESHARE_FREEBSD 3
int rtprio_thread(int fun, int tid, struct rtprio *inout_rtp);
int _pthread_setschedparam_freebsd(int tid, int policy,
const struct sched_param *param) {
struct rtprio rtp;
if (policy == SCHED_RR) {
rtp.type = PRI_REALTIME_FREEBSD;
rtp.prio = RTP_PRIO_MAX_FREEBSD - param->sched_priority;
} else if (policy == SCHED_FIFO) {
rtp.type = PRI_FIFO_FREEBSD;
rtp.prio = RTP_PRIO_MAX_FREEBSD - param->sched_priority;
} else {
rtp.type = PRI_TIMESHARE_FREEBSD;
rtp.prio = 0;
}
return rtprio_thread(RTP_SET_FREEBSD, tid, &rtp);
}