1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Daniel Eischen. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "namespace.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 __weak_reference(_pthread_setschedparam, pthread_setschedparam); 44 45 /* 46 * Set a thread's scheduling parameters, this should be done 47 * in kernel, doing it in userland is no-op. 48 */ 49 int 50 _pthread_setschedparam(pthread_t pthread, int policy, 51 const struct sched_param *param) 52 { 53 struct pthread *curthread = _get_curthread(); 54 int ret; 55 56 if (pthread == curthread) 57 THR_LOCK(curthread); 58 else if ((ret = _thr_find_thread(curthread, pthread, 59 /*include dead*/0)) != 0) 60 return (ret); 61 if (pthread->attr.sched_policy == policy && 62 (policy == SCHED_OTHER || 63 pthread->attr.prio == param->sched_priority)) { 64 pthread->attr.prio = param->sched_priority; 65 THR_THREAD_UNLOCK(curthread, pthread); 66 return (0); 67 } 68 ret = _thr_setscheduler(pthread->tid, policy, param); 69 if (ret == -1) 70 ret = errno; 71 else { 72 pthread->attr.sched_policy = policy; 73 pthread->attr.prio = param->sched_priority; 74 } 75 THR_THREAD_UNLOCK(curthread, pthread); 76 return (ret); 77 } 78