f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/* $NetBSD: sched.c,v 1.4 2012/03/18 02:04:39 christos Exp $ */
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/*
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* Copyright (c) 2008, Mindaugas Rasiukevicius <rmind at NetBSD org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: sched.c,v 1.4 2012/03/18 02:04:39 christos Exp $");
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sched.h>
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#include <signal.h>
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#include <sys/param.h>
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#include <sys/types.h>
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/* All LWPs in the process */
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#define P_ALL_LWPS 0
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/*
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* Scheduling parameters.
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*/
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int
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sched_setparam(pid_t pid, const struct sched_param *param)
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{
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struct sched_param sp;
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memset(&sp, 0, sizeof(struct sched_param));
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sp.sched_priority = param->sched_priority;
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return _sched_setparam(pid, P_ALL_LWPS, SCHED_NONE, &sp);
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}
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int
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sched_getparam(pid_t pid, struct sched_param *param)
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{
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return _sched_getparam(pid, P_ALL_LWPS, NULL, param);
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}
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int
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sched_setscheduler(pid_t pid, int policy, const struct sched_param *param)
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{
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struct sched_param sp;
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int ret, old_policy;
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ret = _sched_getparam(pid, P_ALL_LWPS, &old_policy, &sp);
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if (ret < 0)
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return ret;
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memset(&sp, 0, sizeof(struct sched_param));
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sp.sched_priority = param->sched_priority;
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ret = _sched_setparam(pid, P_ALL_LWPS, policy, &sp);
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if (ret < 0)
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return ret;
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return old_policy;
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}
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int
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sched_getscheduler(pid_t pid)
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{
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struct sched_param sp;
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int ret, policy;
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ret = _sched_getparam(pid, P_ALL_LWPS, &policy, &sp);
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if (ret < 0)
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return ret;
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return policy;
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}
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/*
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* Scheduling priorities.
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*/
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int
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sched_get_priority_max(int policy)
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{
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if (policy < SCHED_OTHER || policy > SCHED_RR) {
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errno = EINVAL;
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return -1;
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}
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return (int)sysconf(_SC_SCHED_PRI_MAX);
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}
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int
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sched_get_priority_min(int policy)
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{
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if (policy < SCHED_OTHER || policy > SCHED_RR) {
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errno = EINVAL;
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return -1;
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}
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return (int)sysconf(_SC_SCHED_PRI_MIN);
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}
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int
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/*ARGSUSED*/
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sched_rr_get_interval(pid_t pid, struct timespec *interval)
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{
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if (pid && kill(pid, 0) == -1)
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return -1;
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interval->tv_sec = 0;
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interval->tv_nsec = sysconf(_SC_SCHED_RT_TS) * 1000;
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return 0;
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}
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/*
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* Process affinity.
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*/
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int
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sched_getaffinity_np(pid_t pid, size_t size, cpuset_t *cpuset)
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{
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return _sched_getaffinity(pid, P_ALL_LWPS, size, cpuset);
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}
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int
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sched_setaffinity_np(pid_t pid, size_t size, cpuset_t *cpuset)
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{
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return _sched_setaffinity(pid, P_ALL_LWPS, size, cpuset);
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}
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