1 /* $NetBSD: pthread_misc.c,v 1.15 2013/03/21 16:49:12 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2006, 2007, 2008 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: pthread_misc.c,v 1.15 2013/03/21 16:49:12 christos Exp $"); 34 35 #include <errno.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #include <sys/types.h> 40 #include <sys/pset.h> 41 #include <sys/signal.h> 42 #include <sys/time.h> 43 44 #include <lwp.h> 45 #include <sched.h> 46 47 #include "pthread.h" 48 #include "pthread_int.h" 49 #include "reentrant.h" 50 51 int pthread__sched_yield(void); 52 53 int _sys___sigprocmask14(int, const sigset_t *, sigset_t *); 54 int _sys_sched_yield(void); 55 56 __strong_alias(__libc_thr_sigsetmask,pthread_sigmask) 57 __strong_alias(__sigprocmask14,pthread_sigmask) 58 __strong_alias(__libc_thr_yield,pthread__sched_yield) 59 60 int 61 pthread_getschedparam(pthread_t thread, int *policy, struct sched_param *param) 62 { 63 64 if (pthread__find(thread) != 0) 65 return ESRCH; 66 67 if (_sched_getparam(getpid(), thread->pt_lid, policy, param) < 0) 68 return errno; 69 70 return 0; 71 } 72 73 int 74 pthread_setschedparam(pthread_t thread, int policy, 75 const struct sched_param *param) 76 { 77 struct sched_param sp; 78 79 if (pthread__find(thread) != 0) 80 return ESRCH; 81 82 memcpy(&sp, param, sizeof(struct sched_param)); 83 if (_sched_setparam(getpid(), thread->pt_lid, policy, &sp) < 0) 84 return errno; 85 86 return 0; 87 } 88 89 int 90 pthread_getaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset) 91 { 92 93 if (pthread__find(thread) != 0) 94 return ESRCH; 95 96 if (_sched_getaffinity(getpid(), thread->pt_lid, size, cpuset) < 0) 97 return errno; 98 99 return 0; 100 } 101 102 int 103 pthread_setaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset) 104 { 105 106 if (pthread__find(thread) != 0) 107 return ESRCH; 108 109 if (_sched_setaffinity(getpid(), thread->pt_lid, size, cpuset) < 0) 110 return errno; 111 112 return 0; 113 } 114 115 int 116 pthread_setschedprio(pthread_t thread, int prio) 117 { 118 struct sched_param sp; 119 120 if (pthread__find(thread) != 0) 121 return ESRCH; 122 123 sp.sched_priority = prio; 124 if (_sched_setparam(getpid(), thread->pt_lid, SCHED_NONE, &sp) < 0) 125 return errno; 126 127 return 0; 128 } 129 130 int 131 pthread_kill(pthread_t thread, int sig) 132 { 133 134 if ((sig < 0) || (sig >= _NSIG)) 135 return EINVAL; 136 if (pthread__find(thread) != 0) 137 return ESRCH; 138 if (_lwp_kill(thread->pt_lid, sig)) 139 return errno; 140 return 0; 141 } 142 143 int 144 pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) 145 { 146 if (_sys___sigprocmask14(how, set, oset)) 147 return errno; 148 return 0; 149 } 150 151 int 152 pthread__sched_yield(void) 153 { 154 pthread_t self; 155 int error; 156 157 if (__predict_false(__uselibcstub)) 158 return __libc_thr_yield(); 159 160 self = pthread__self(); 161 162 /* Memory barrier for unlocked mutex release. */ 163 membar_producer(); 164 self->pt_blocking++; 165 error = _sys_sched_yield(); 166 self->pt_blocking--; 167 membar_sync(); 168 169 return error; 170 } 171