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/types.h>
37 #include <sys/rtprio.h>
38 #include <errno.h>
39 #include <pthread.h>
40 #include "un-namespace.h"
41
42 #include "thr_private.h"
43
44 __weak_reference(_pthread_getschedparam, pthread_getschedparam);
45
46 int
_pthread_getschedparam(pthread_t pthread,int * __restrict policy,struct sched_param * __restrict param)47 _pthread_getschedparam(pthread_t pthread, int * __restrict policy,
48 struct sched_param * __restrict param)
49 {
50 struct pthread *curthread = _get_curthread();
51 int ret = 0;
52
53 if (policy == NULL || param == NULL)
54 return (EINVAL);
55
56 /*
57 * Avoid searching the thread list when it is the current
58 * thread.
59 */
60 if (pthread == curthread)
61 THR_LOCK(curthread);
62 else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0)))
63 return (ret);
64 *policy = pthread->attr.sched_policy;
65 param->sched_priority = pthread->attr.prio;
66 THR_THREAD_UNLOCK(curthread, pthread);
67 return (ret);
68 }
69