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 * $FreeBSD: src/lib/libpthread/thread/thr_getschedparam.c,v 1.10 2003/07/07 04:28:23 davidxu Exp $ 33 * $DragonFly: src/lib/libthread_xu/thread/thr_getschedparam.c,v 1.1 2005/02/01 12:38:27 davidxu Exp $ 34 */ 35 #include <errno.h> 36 #include <pthread.h> 37 #include "thr_private.h" 38 39 __weak_reference(_pthread_getschedparam, pthread_getschedparam); 40 41 int 42 _pthread_getschedparam(pthread_t pthread, int *policy, 43 struct sched_param *param) 44 { 45 struct pthread *curthread = _get_curthread(); 46 int ret, tmp; 47 48 if ((param == NULL) || (policy == NULL)) 49 /* Return an invalid argument error: */ 50 ret = EINVAL; 51 else if (pthread == curthread) { 52 /* 53 * Avoid searching the thread list when it is the current 54 * thread. 55 */ 56 THR_THREAD_LOCK(curthread, curthread); 57 param->sched_priority = 58 THR_BASE_PRIORITY(pthread->base_priority); 59 tmp = pthread->attr.sched_policy; 60 THR_THREAD_UNLOCK(curthread, curthread); 61 *policy = tmp; 62 ret = 0; 63 } 64 /* Find the thread in the list of active threads. */ 65 else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) 66 == 0) { 67 THR_THREAD_LOCK(curthread, pthread); 68 param->sched_priority = 69 THR_BASE_PRIORITY(pthread->base_priority); 70 tmp = pthread->attr.sched_policy; 71 THR_THREAD_UNLOCK(curthread, pthread); 72 _thr_ref_delete(curthread, pthread); 73 *policy = tmp; 74 } 75 return (ret); 76 } 77