1 /* 2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 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 John Birrell. 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 JOHN BIRRELL 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 * $FreeBSD$ 33 */ 34 35 #include "namespace.h" 36 #include <pthread.h> 37 #include "un-namespace.h" 38 39 #include "thr_private.h" 40 41 __weak_reference(_pthread_setprio, pthread_setprio); 42 43 int 44 _pthread_setprio(pthread_t pthread, int prio) 45 { 46 struct pthread *curthread = _get_curthread(); 47 struct sched_param param; 48 int ret; 49 50 param.sched_priority = prio; 51 if (pthread == curthread) { 52 THR_LOCK(curthread); 53 if (curthread->attr.sched_policy == SCHED_OTHER || 54 curthread->attr.prio == prio) { 55 curthread->attr.prio = prio; 56 ret = 0; 57 } else { 58 ret = _thr_setscheduler(curthread->tid, 59 curthread->attr.sched_policy, ¶m); 60 if (ret == -1) 61 ret = errno; 62 else 63 curthread->attr.prio = prio; 64 } 65 THR_UNLOCK(curthread); 66 } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) 67 == 0) { 68 THR_THREAD_LOCK(curthread, pthread); 69 if (pthread->attr.sched_policy == SCHED_OTHER || 70 pthread->attr.prio == prio) { 71 pthread->attr.prio = prio; 72 ret = 0; 73 } else { 74 ret = _thr_setscheduler(pthread->tid, 75 curthread->attr.sched_policy, ¶m); 76 if (ret == -1) 77 ret = errno; 78 else 79 pthread->attr.prio = prio; 80 } 81 THR_THREAD_UNLOCK(curthread, pthread); 82 _thr_ref_delete(curthread, pthread); 83 } 84 return (ret); 85 } 86