1 /* $NetBSD: pthread_misc.c,v 1.14 2009/08/12 23:51:23 enami 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 1.14 2009/08/12 23:51:23 enami 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 50 int pthread__sched_yield(void); 51 52 int _sys___sigprocmask14(int, const sigset_t *, sigset_t *); 53 int _sys_sched_yield(void); 54 55 __strong_alias(__libc_thr_sigsetmask,pthread_sigmask) 56 __strong_alias(__sigprocmask14,pthread_sigmask) 57 __strong_alias(__libc_thr_yield,pthread__sched_yield) 58 59 int 60 pthread_getschedparam(pthread_t thread, int *policy, struct sched_param *param) 61 { 62 63 if (pthread__find(thread) != 0) 64 return ESRCH; 65 66 if (_sched_getparam(getpid(), thread->pt_lid, policy, param) < 0) 67 return errno; 68 69 return 0; 70 } 71 72 int 73 pthread_setschedparam(pthread_t thread, int policy, 74 const struct sched_param *param) 75 { 76 struct sched_param sp; 77 78 if (pthread__find(thread) != 0) 79 return ESRCH; 80 81 memcpy(&sp, param, sizeof(struct sched_param)); 82 if (_sched_setparam(getpid(), thread->pt_lid, policy, &sp) < 0) 83 return errno; 84 85 return 0; 86 } 87 88 int 89 pthread_getaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset) 90 { 91 92 if (pthread__find(thread) != 0) 93 return ESRCH; 94 95 if (_sched_getaffinity(getpid(), thread->pt_lid, size, cpuset) < 0) 96 return errno; 97 98 return 0; 99 } 100 101 int 102 pthread_setaffinity_np(pthread_t thread, size_t size, cpuset_t *cpuset) 103 { 104 105 if (pthread__find(thread) != 0) 106 return ESRCH; 107 108 if (_sched_setaffinity(getpid(), thread->pt_lid, size, cpuset) < 0) 109 return errno; 110 111 return 0; 112 } 113 114 int 115 pthread_setschedprio(pthread_t thread, int prio) 116 { 117 struct sched_param sp; 118 119 if (pthread__find(thread) != 0) 120 return ESRCH; 121 122 sp.sched_priority = prio; 123 if (_sched_setparam(getpid(), thread->pt_lid, SCHED_NONE, &sp) < 0) 124 return errno; 125 126 return 0; 127 } 128 129 int 130 pthread_kill(pthread_t thread, int sig) 131 { 132 133 if ((sig < 0) || (sig >= _NSIG)) 134 return EINVAL; 135 if (pthread__find(thread) != 0) 136 return ESRCH; 137 if (_lwp_kill(thread->pt_lid, sig)) 138 return errno; 139 return 0; 140 } 141 142 int 143 pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) 144 { 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 self = pthread__self(); 158 159 /* Memory barrier for unlocked mutex release. */ 160 membar_producer(); 161 self->pt_blocking++; 162 error = _sys_sched_yield(); 163 self->pt_blocking--; 164 membar_sync(); 165 166 return error; 167 } 168