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 */
33
34 #include "namespace.h"
35 #include <machine/tls.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 int
_pthread_setschedparam(pthread_t pthread,int policy,const struct sched_param * param)44 _pthread_setschedparam(pthread_t pthread, int policy,
45 const struct sched_param *param)
46 {
47 pthread_t curthread = tls_get_curthread();
48 int ret = 0;
49
50 if (pthread == curthread) {
51 THR_LOCK(curthread);
52 if (curthread->attr.sched_policy == policy &&
53 curthread->attr.prio == param->sched_priority) {
54 THR_UNLOCK(curthread);
55 return (0);
56 }
57 if (policy == SCHED_OTHER) {
58 ret = _thr_set_sched_other_prio(curthread,
59 param->sched_priority);
60 } else {
61 ret = _thr_setscheduler(curthread->tid, policy, param);
62 }
63 if (ret == -1)
64 ret = errno;
65 else {
66 curthread->attr.sched_policy = policy;
67 curthread->attr.prio = param->sched_priority;
68 }
69 THR_UNLOCK(curthread);
70 } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
71 == 0) {
72 THR_THREAD_LOCK(curthread, pthread);
73 if (pthread->attr.sched_policy == policy &&
74 pthread->attr.prio == param->sched_priority) {
75 THR_THREAD_UNLOCK(curthread, pthread);
76 return (0);
77 }
78 if (policy == SCHED_OTHER) {
79 ret = _thr_set_sched_other_prio(pthread,
80 param->sched_priority);
81 } else {
82 ret = _thr_setscheduler(pthread->tid, policy, param);
83 }
84 if (ret == -1)
85 ret = errno;
86 else {
87 pthread->attr.sched_policy = policy;
88 pthread->attr.prio = param->sched_priority;
89 }
90 THR_THREAD_UNLOCK(curthread, pthread);
91 _thr_ref_delete(curthread, pthread);
92 }
93 return (ret);
94 }
95
96 __strong_reference(_pthread_setschedparam, pthread_setschedparam);
97