Cleanup the TLS implementation:
[dragonfly.git] / lib / libthread_xu / thread / thr_detach.c
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1/*
2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
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 John Birrell.
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 JOHN BIRRELL 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_detach.c,v 1.23 2003/07/23 02:11:07 deischen Exp $
9e2ee207 33 * $DragonFly: src/lib/libthread_xu/thread/thr_detach.c,v 1.2 2005/03/29 19:26:20 joerg Exp $
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34 */
35#include <sys/types.h>
36#include <machine/atomic.h>
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37#include <machine/tls.h>
38
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39#include <errno.h>
40#include <pthread.h>
41#include "thr_private.h"
42
43__weak_reference(_pthread_detach, pthread_detach);
44
45int
46_pthread_detach(pthread_t pthread)
47{
9e2ee207 48 struct pthread *curthread = tls_get_curthread();
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49 int rval;
50
51 if (pthread == NULL)
52 return (EINVAL);
53
54 THREAD_LIST_LOCK(curthread);
55 if ((rval = _thr_find_thread(curthread, pthread,
56 /*include dead*/1)) != 0) {
57 THREAD_LIST_UNLOCK(curthread);
58 return (rval);
59 }
60
61 /* Check if the thread is already detached or has a joiner. */
62 if ((pthread->tlflags & TLFLAGS_DETACHED) != 0 ||
63 (pthread->joiner != NULL)) {
64 THREAD_LIST_UNLOCK(curthread);
65 return (EINVAL);
66 }
67
68 /* Flag the thread as detached. */
69 pthread->tlflags |= TLFLAGS_DETACHED;
70 if (pthread->state == PS_DEAD)
71 THR_GCLIST_ADD(pthread);
72 THREAD_LIST_UNLOCK(curthread);
73
74 return (0);
75}