b5e9addd22
in-kernel priority is used. Reported by <drochner>. Minor fixes for scheduling calls to conform the POSIX: - If pid is equal to zero, use the calling process; - In case of permission problem, return EPERM instead of EACESS; - sched_setscheduler() should return previously used policy; - pthread_* calls should return the error code or zero; Should fix the namespace problems (and builds of some packages): - Move cpuset_t defintion from pset.h to sched.h; - Remove the #include of pset.h in pthread.h;
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
/* $NetBSD: sched.c,v 1.2 2008/01/26 17:55:30 rmind Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2008, Mindaugas Rasiukevicius <rmind at NetBSD org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__RCSID("$NetBSD: sched.c,v 1.2 2008/01/26 17:55:30 rmind Exp $");
|
|
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <sched.h>
|
|
#include <sys/param.h>
|
|
#include <sys/pset.h>
|
|
#include <sys/types.h>
|
|
|
|
/* All LWPs in the process */
|
|
#define P_ALL_LWPS 0
|
|
|
|
/*
|
|
* Scheduling parameters.
|
|
*/
|
|
|
|
int
|
|
sched_setparam(pid_t pid, const struct sched_param *param)
|
|
{
|
|
struct sched_param sp;
|
|
|
|
memset(&sp, 0, sizeof(struct sched_param));
|
|
sp.sched_priority = param->sched_priority;
|
|
sp.sched_class = SCHED_NONE;
|
|
return _sched_setparam(pid, P_ALL_LWPS, &sp);
|
|
}
|
|
|
|
int
|
|
sched_getparam(pid_t pid, struct sched_param *param)
|
|
{
|
|
|
|
return _sched_getparam(pid, P_ALL_LWPS, param);
|
|
}
|
|
|
|
int
|
|
sched_setscheduler(pid_t pid, int policy, const struct sched_param *param)
|
|
{
|
|
struct sched_param sp;
|
|
int ret, old_policy;
|
|
|
|
ret = _sched_getparam(pid, P_ALL_LWPS, &sp);
|
|
if (ret < 0)
|
|
return ret;
|
|
old_policy = sp.sched_class;
|
|
|
|
memset(&sp, 0, sizeof(struct sched_param));
|
|
sp.sched_priority = param->sched_priority;
|
|
sp.sched_class = policy;
|
|
ret = _sched_setparam(pid, P_ALL_LWPS, &sp);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return old_policy;
|
|
}
|
|
|
|
int
|
|
sched_getscheduler(pid_t pid)
|
|
{
|
|
struct sched_param sp;
|
|
int ret;
|
|
|
|
ret = _sched_getparam(pid, P_ALL_LWPS, &sp);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sp.sched_class;
|
|
}
|
|
|
|
/*
|
|
* Scheduling priorities.
|
|
*/
|
|
|
|
int
|
|
sched_get_priority_max(int policy)
|
|
{
|
|
|
|
if (policy < SCHED_OTHER || policy > SCHED_RR) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
return sysconf(_SC_SCHED_PRI_MAX);
|
|
}
|
|
|
|
int
|
|
sched_get_priority_min(int policy)
|
|
{
|
|
|
|
if (policy < SCHED_OTHER || policy > SCHED_RR) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
return sysconf(_SC_SCHED_PRI_MIN);
|
|
}
|
|
|
|
int
|
|
sched_rr_get_interval(pid_t pid, struct timespec *interval)
|
|
{
|
|
|
|
interval->tv_sec = 0;
|
|
interval->tv_nsec = sysconf(_SC_SCHED_RT_TS) * 1000;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Processor-sets.
|
|
*/
|
|
|
|
int
|
|
pset_bind(psetid_t psid, idtype_t idtype, id_t id, psetid_t *opsid)
|
|
{
|
|
|
|
return _pset_bind(idtype, id, P_ALL_LWPS, psid, opsid);
|
|
}
|