1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the author nor the names of any co-contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #include "namespace.h" 34 #include <pthread.h> 35 #include "un-namespace.h" 36 37 #include "thr_private.h" 38 39 __weak_reference(_pthread_setprio, pthread_setprio); 40 41 int 42 _pthread_setprio(pthread_t pthread, int prio) 43 { 44 struct pthread *curthread = _get_curthread(); 45 struct sched_param param; 46 int ret; 47 48 param.sched_priority = prio; 49 if (pthread == curthread) 50 THR_LOCK(curthread); 51 else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0))) 52 return (ret); 53 if (pthread->attr.sched_policy == SCHED_OTHER || 54 pthread->attr.prio == prio) { 55 pthread->attr.prio = prio; 56 ret = 0; 57 } else { 58 ret = _thr_setscheduler(pthread->tid, 59 pthread->attr.sched_policy, ¶m); 60 if (ret == -1) 61 ret = errno; 62 else 63 pthread->attr.prio = prio; 64 } 65 THR_THREAD_UNLOCK(curthread, pthread); 66 return (ret); 67 } 68