183 lines
4.4 KiB
C
183 lines
4.4 KiB
C
/* $NetBSD: pthread_misc.c,v 1.10 2008/06/28 16:50:43 ad Exp $ */
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/*-
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* Copyright (c) 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nathan J. Williams.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: pthread_misc.c,v 1.10 2008/06/28 16:50:43 ad Exp $");
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/pset.h>
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#include <sys/signal.h>
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#include <sys/time.h>
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#include <lwp.h>
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#include <sched.h>
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#include "pthread.h"
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#include "pthread_int.h"
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int pthread__sched_yield(void);
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int _sys___sigprocmask14(int, const sigset_t *, sigset_t *);
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int _sys_nanosleep(const struct timespec *, struct timespec *);
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int _sys_sched_yield(void);
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__strong_alias(_nanosleep, nanosleep)
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__strong_alias(__libc_thr_sigsetmask,pthread_sigmask)
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__strong_alias(__sigprocmask14,pthread_sigmask)
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__strong_alias(__libc_thr_yield,pthread__sched_yield)
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int
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pthread_getschedparam(pthread_t thread, int *policy, struct sched_param *param)
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{
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if (pthread__find(thread) != 0)
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return ESRCH;
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if (_sched_getparam(getpid(), thread->pt_lid, policy, param) < 0)
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return errno;
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return 0;
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}
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int
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pthread_setschedparam(pthread_t thread, int policy,
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const struct sched_param *param)
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{
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struct sched_param sp;
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if (pthread__find(thread) != 0)
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return ESRCH;
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memcpy(&sp, param, sizeof(struct sched_param));
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if (_sched_setparam(getpid(), thread->pt_lid, policy, &sp) < 0)
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return errno;
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return 0;
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}
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int
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pthread_getaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset)
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{
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if (pthread__find(thread) != 0)
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return ESRCH;
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if (_sched_getaffinity(getpid(), thread->pt_lid, size, cpuset) < 0)
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return errno;
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return 0;
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}
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int
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pthread_setaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset)
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{
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if (pthread__find(thread) != 0)
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return ESRCH;
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if (_sched_setaffinity(getpid(), thread->pt_lid, size, cpuset) < 0)
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return errno;
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return 0;
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}
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int
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pthread_setschedprio(pthread_t thread, int prio)
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{
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struct sched_param sp;
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if (pthread__find(thread) != 0)
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return ESRCH;
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sp.sched_priority = prio;
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if (_sched_setparam(getpid(), thread->pt_lid, SCHED_NONE, &sp) < 0)
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return errno;
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return 0;
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}
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int
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pthread_kill(pthread_t thread, int sig)
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{
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if ((sig < 0) || (sig >= _NSIG))
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return EINVAL;
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if (pthread__find(thread) != 0)
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return ESRCH;
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if (_lwp_kill(thread->pt_lid, sig))
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return errno;
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return 0;
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}
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int
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pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
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{
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if (_sys___sigprocmask14(how, set, oset))
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return errno;
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return 0;
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}
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#ifndef lint
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int
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nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
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{
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/*
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* For now, just nanosleep. In the future, maybe pass a ucontext_t
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* to _lwp_nanosleep() and allow it to recycle our kernel stack.
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*/
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return _sys_nanosleep(rqtp, rmtp);
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}
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#endif
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int
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pthread__sched_yield(void)
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{
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pthread_t self;
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int error;
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self = pthread__self();
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/* Memory barrier for unlocked mutex release. */
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membar_producer();
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self->pt_blocking++;
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error = _sys_sched_yield();
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self->pt_blocking--;
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membar_sync();
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return error;
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}
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