1 /* 2 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Daniel Eischen. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 */ 33 34 #include "namespace.h" 35 #include <machine/tls.h> 36 #include <sys/param.h> 37 #include <errno.h> 38 #include <pthread.h> 39 #include "un-namespace.h" 40 41 #include "thr_private.h" 42 43 int 44 _pthread_setschedparam(pthread_t pthread, int policy, 45 const struct sched_param *param) 46 { 47 pthread_t curthread = tls_get_curthread(); 48 int ret = 0; 49 50 if (pthread == curthread) { 51 THR_LOCK(curthread); 52 if (curthread->attr.sched_policy == policy && 53 curthread->attr.prio == param->sched_priority) { 54 THR_UNLOCK(curthread); 55 return (0); 56 } 57 if (policy == SCHED_OTHER) { 58 ret = _thr_set_sched_other_prio(curthread, 59 param->sched_priority); 60 } else { 61 ret = _thr_setscheduler(curthread->tid, policy, param); 62 } 63 if (ret == -1) 64 ret = errno; 65 else { 66 curthread->attr.sched_policy = policy; 67 curthread->attr.prio = param->sched_priority; 68 } 69 THR_UNLOCK(curthread); 70 } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) 71 == 0) { 72 THR_THREAD_LOCK(curthread, pthread); 73 if (pthread->attr.sched_policy == policy && 74 pthread->attr.prio == param->sched_priority) { 75 THR_THREAD_UNLOCK(curthread, pthread); 76 return (0); 77 } 78 if (policy == SCHED_OTHER) { 79 ret = _thr_set_sched_other_prio(pthread, 80 param->sched_priority); 81 } else { 82 ret = _thr_setscheduler(pthread->tid, policy, param); 83 } 84 if (ret == -1) 85 ret = errno; 86 else { 87 pthread->attr.sched_policy = policy; 88 pthread->attr.prio = param->sched_priority; 89 } 90 THR_THREAD_UNLOCK(curthread, pthread); 91 _thr_ref_delete(curthread, pthread); 92 } 93 return (ret); 94 } 95 96 __strong_reference(_pthread_setschedparam, pthread_setschedparam); 97