1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1998 Daniel Eischen <[email protected]>.
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 <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include "namespace.h"
39 #include <sys/types.h>
40 #include <sys/rtprio.h>
41 #include <errno.h>
42 #include <pthread.h>
43 #include "un-namespace.h"
44
45 #include "thr_private.h"
46
47 __weak_reference(_pthread_getschedparam, pthread_getschedparam);
48
49 int
_pthread_getschedparam(pthread_t pthread,int * __restrict policy,struct sched_param * __restrict param)50 _pthread_getschedparam(pthread_t pthread, int * __restrict policy,
51 struct sched_param * __restrict param)
52 {
53 struct pthread *curthread = _get_curthread();
54 int ret = 0;
55
56 if (policy == NULL || param == NULL)
57 return (EINVAL);
58
59 /*
60 * Avoid searching the thread list when it is the current
61 * thread.
62 */
63 if (pthread == curthread)
64 THR_LOCK(curthread);
65 else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0)))
66 return (ret);
67 *policy = pthread->attr.sched_policy;
68 param->sched_priority = pthread->attr.prio;
69 THR_THREAD_UNLOCK(curthread, pthread);
70 return (ret);
71 }
72