thr_setprio.c revision 256281
1101099Srwatson/* 2184308Srwatson * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 3140628Srwatson * All rights reserved. 4172930Srwatson * 5101099Srwatson * Redistribution and use in source and binary forms, with or without 6101099Srwatson * modification, are permitted provided that the following conditions 7101099Srwatson * are met: 8101099Srwatson * 1. Redistributions of source code must retain the above copyright 9140628Srwatson * notice, this list of conditions and the following disclaimer. 10140628Srwatson * 2. Redistributions in binary form must reproduce the above copyright 11140628Srwatson * notice, this list of conditions and the following disclaimer in the 12140628Srwatson * documentation and/or other materials provided with the distribution. 13101099Srwatson * 3. Neither the name of the author nor the names of any co-contributors 14172930Srwatson * may be used to endorse or promote products derived from this software 15172930Srwatson * without specific prior written permission. 16172930Srwatson * 17101099Srwatson * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 18101099Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19101099Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20101099Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21101099Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22101099Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23101099Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24101099Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25101099Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26101099Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27101099Srwatson * SUCH DAMAGE. 28101099Srwatson * 29101099Srwatson * $FreeBSD: stable/10/lib/libthr/thread/thr_setprio.c 238642 2012-07-20 03:22:17Z davidxu $ 30101099Srwatson */ 31101099Srwatson 32101099Srwatson#include "namespace.h" 33101099Srwatson#include <pthread.h> 34101099Srwatson#include "un-namespace.h" 35101099Srwatson 36101099Srwatson#include "thr_private.h" 37101099Srwatson 38101099Srwatson__weak_reference(_pthread_setprio, pthread_setprio); 39101099Srwatson 40101099Srwatsonint 41101099Srwatson_pthread_setprio(pthread_t pthread, int prio) 42101099Srwatson{ 43168951Srwatson struct pthread *curthread = _get_curthread(); 44101099Srwatson struct sched_param param; 45101099Srwatson int ret; 46101099Srwatson 47101099Srwatson param.sched_priority = prio; 48101099Srwatson if (pthread == curthread) 49105988Srwatson THR_LOCK(curthread); 50101099Srwatson else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0))) 51164184Strhodes return (ret); 52103183Sbde if (pthread->attr.sched_policy == SCHED_OTHER || 53145076Scsjp pthread->attr.prio == prio) { 54101099Srwatson pthread->attr.prio = prio; 55168951Srwatson ret = 0; 56101099Srwatson } else { 57115497Srwatson ret = _thr_setscheduler(pthread->tid, 58101099Srwatson pthread->attr.sched_policy, ¶m); 59101099Srwatson if (ret == -1) 60101099Srwatson ret = errno; 61105696Srwatson else 62101099Srwatson pthread->attr.prio = prio; 63101099Srwatson } 64101099Srwatson THR_THREAD_UNLOCK(curthread, pthread); 65101099Srwatson return (ret); 66101099Srwatson} 67150340Sphk