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 * $DragonFly: src/lib/libthread_xu/thread/thr_setschedparam.c,v 1.7 2007/05/04 17:18:55 dillon Exp $ 33 */ 34 35 #include "namespace.h" 36 #include <machine/tls.h> 37 38 #include <sys/param.h> 39 #include <errno.h> 40 #include <pthread.h> 41 #include "un-namespace.h" 42 43 #include "thr_private.h" 44 45 int 46 _pthread_setschedparam(pthread_t pthread, int policy, 47 const struct sched_param *param) 48 { 49 struct pthread *curthread = tls_get_curthread(); 50 int ret = 0; 51 52 if (pthread == curthread) { 53 THR_LOCK(curthread); 54 if (curthread->attr.sched_policy == policy && 55 curthread->attr.prio == param->sched_priority) { 56 THR_UNLOCK(curthread); 57 return (0); 58 } 59 if (policy == SCHED_OTHER) { 60 ret = _thr_set_sched_other_prio(curthread, 61 param->sched_priority); 62 } else { 63 ret = _thr_setscheduler(curthread->tid, policy, param); 64 } 65 if (ret == -1) 66 ret = errno; 67 else { 68 curthread->attr.sched_policy = policy; 69 curthread->attr.prio = param->sched_priority; 70 } 71 THR_UNLOCK(curthread); 72 } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) 73 == 0) { 74 THR_THREAD_LOCK(curthread, pthread); 75 if (pthread->attr.sched_policy == policy && 76 pthread->attr.prio == param->sched_priority) { 77 THR_THREAD_UNLOCK(curthread, pthread); 78 return (0); 79 } 80 if (policy == SCHED_OTHER) { 81 ret = _thr_set_sched_other_prio(pthread, 82 param->sched_priority); 83 } else { 84 ret = _thr_setscheduler(pthread->tid, policy, param); 85 } 86 if (ret == -1) 87 ret = errno; 88 else { 89 pthread->attr.sched_policy = policy; 90 pthread->attr.prio = param->sched_priority; 91 } 92 THR_THREAD_UNLOCK(curthread, pthread); 93 _thr_ref_delete(curthread, pthread); 94 } 95 return (ret); 96 } 97 98 __strong_reference(_pthread_setschedparam, pthread_setschedparam); 99