Cleanup the TLS implementation:
[dragonfly.git] / lib / libthread_xu / thread / thr_getschedparam.c
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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 * $FreeBSD: src/lib/libpthread/thread/thr_getschedparam.c,v 1.10 2003/07/07 04:28:23 davidxu Exp $
9e2ee207 33 * $DragonFly: src/lib/libthread_xu/thread/thr_getschedparam.c,v 1.2 2005/03/29 19:26:20 joerg Exp $
71b3fa15 34 */
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35
36#include <machine/tls.h>
37
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38#include <errno.h>
39#include <pthread.h>
40#include "thr_private.h"
41
42__weak_reference(_pthread_getschedparam, pthread_getschedparam);
43
44int
45_pthread_getschedparam(pthread_t pthread, int *policy,
46 struct sched_param *param)
47{
9e2ee207 48 struct pthread *curthread = tls_get_curthread();
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49 int ret, tmp;
50
51 if ((param == NULL) || (policy == NULL))
52 /* Return an invalid argument error: */
53 ret = EINVAL;
54 else if (pthread == curthread) {
55 /*
56 * Avoid searching the thread list when it is the current
57 * thread.
58 */
59 THR_THREAD_LOCK(curthread, curthread);
60 param->sched_priority =
61 THR_BASE_PRIORITY(pthread->base_priority);
62 tmp = pthread->attr.sched_policy;
63 THR_THREAD_UNLOCK(curthread, curthread);
64 *policy = tmp;
65 ret = 0;
66 }
67 /* Find the thread in the list of active threads. */
68 else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
69 == 0) {
70 THR_THREAD_LOCK(curthread, pthread);
71 param->sched_priority =
72 THR_BASE_PRIORITY(pthread->base_priority);
73 tmp = pthread->attr.sched_policy;
74 THR_THREAD_UNLOCK(curthread, pthread);
75 _thr_ref_delete(curthread, pthread);
76 *policy = tmp;
77 }
78 return (ret);
79}