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 <errno.h>
37 #include <pthread.h>
38 #include "un-namespace.h"
39
40 #include "thr_private.h"
41
42 int
_pthread_getschedparam(pthread_t pthread,int * __restrict policy,struct sched_param * __restrict param)43 _pthread_getschedparam(pthread_t pthread, int * __restrict policy,
44 struct sched_param * __restrict param)
45 {
46 pthread_t curthread = tls_get_curthread();
47 int ret = 0;
48
49 if (policy == NULL || param == NULL)
50 return (EINVAL);
51
52 if (pthread == curthread) {
53 /*
54 * Avoid searching the thread list when it is the current
55 * thread.
56 */
57 THR_LOCK(curthread);
58 *policy = curthread->attr.sched_policy;
59 param->sched_priority = curthread->attr.prio;
60 THR_UNLOCK(curthread);
61 }
62 /* Find the thread in the list of active threads. */
63 else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
64 == 0) {
65 THR_THREAD_LOCK(curthread, pthread);
66 *policy = pthread->attr.sched_policy;
67 param->sched_priority = pthread->attr.prio;
68 THR_THREAD_UNLOCK(curthread, pthread);
69 _thr_ref_delete(curthread, pthread);
70 }
71 return (ret);
72 }
73
74 __strong_reference(_pthread_getschedparam, pthread_getschedparam);
75