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
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