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pthread_misc.c revision 1.2 
      1 /*	$NetBSD: pthread_misc.c,v 1.2 2007/08/16 13:54:17 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001, 2006, 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nathan J. Williams.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __RCSID("$NetBSD: pthread_misc.c,v 1.2 2007/08/16 13:54:17 ad Exp $");
     41 
     42 #include <sys/types.h>
     43 #include <sys/signal.h>
     44 #include <sys/time.h>
     45 
     46 #include <errno.h>
     47 #include <lwp.h>
     48 
     49 #include "pthread.h"
     50 #include "pthread_int.h"
     51 
     52 int	_sys___sigprocmask14(int, const sigset_t *, sigset_t *);
     53 int	_sys_nanosleep(const struct timespec *, struct timespec *);
     54 
     55 __strong_alias(_nanosleep, nanosleep)
     56 __strong_alias(__libc_thr_sigsetmask,pthread_sigmask)
     57 __strong_alias(__sigprocmask14,pthread_sigmask)
     58 __strong_alias(__libc_thr_yield,_sys_sched_yield)
     59 
     60 /*ARGSUSED*/
     61 int
     62 pthread_getschedparam(pthread_t thread, int *policy, struct sched_param *param)
     63 {
     64 	if (param == NULL || policy == NULL)
     65 		return EINVAL;
     66 	param->sched_priority = 0;
     67 	*policy = SCHED_RR;
     68 	return 0;
     69 }
     70 
     71 /*ARGSUSED*/
     72 int
     73 pthread_setschedparam(pthread_t thread, int policy,
     74     const struct sched_param *param)
     75 {
     76 	if (param == NULL || policy < SCHED_FIFO || policy > SCHED_RR)
     77 		return EINVAL;
     78 	if (param->sched_priority > 0 || policy != SCHED_RR)
     79 		return ENOTSUP;
     80 	return 0;
     81 }
     82 
     83 int
     84 pthread_kill(pthread_t thread, int sig)
     85 {
     86 
     87 	if ((sig < 0) || (sig >= _NSIG))
     88 		return EINVAL;
     89 	if (pthread__find(thread) != 0)
     90 		return ESRCH;
     91 
     92 	return _lwp_kill(thread->pt_lid, sig);
     93 }
     94 
     95 int
     96 pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
     97 {
     98 
     99 	return _sys___sigprocmask14(how, set, oset);
    100 }
    101 
    102 int
    103 nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
    104 {
    105 
    106 	/*
    107 	 * For now, just nanosleep.  In the future, maybe pass a ucontext_t
    108 	 * to _lwp_nanosleep() and allow it to recycle our kernel stack.
    109 	 */
    110 	return  _sys_nanosleep(rqtp, rmtp);
    111 }
    112