thr_detach.c revision 157457 
1/*
2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
3 * Copyright (C) 2003 Daniel M. Eischen <deischen@freebsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice unmodified, this list of conditions, and the following
11 *    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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD: head/lib/libthr/thread/thr_detach.c 157457 2006-04-04 02:57:49Z davidxu $
28 *
29 */
30
31#include "namespace.h"
32#include <sys/types.h>
33#include <errno.h>
34#include <pthread.h>
35#include "un-namespace.h"
36
37#include "thr_private.h"
38
39__weak_reference(_pthread_detach, pthread_detach);
40
41int
42_pthread_detach(pthread_t pthread)
43{
44	struct pthread *curthread = _get_curthread();
45	int rval;
46
47	if (pthread == NULL)
48		return (EINVAL);
49
50	THREAD_LIST_LOCK(curthread);
51	if ((rval = _thr_find_thread(curthread, pthread,
52			/*include dead*/1)) != 0) {
53		THREAD_LIST_UNLOCK(curthread);
54		return (rval);
55	}
56
57	/* Check if the thread is already detached or has a joiner. */
58	if ((pthread->tlflags & TLFLAGS_DETACHED) != 0 ||
59	    (pthread->joiner != NULL)) {
60		THREAD_LIST_UNLOCK(curthread);
61		return (EINVAL);
62	}
63
64	/* Flag the thread as detached. */
65	pthread->tlflags |= TLFLAGS_DETACHED;
66	if (pthread->state == PS_DEAD)
67		THR_GCLIST_ADD(pthread);
68	THREAD_LIST_UNLOCK(curthread);
69
70	return (0);
71}
72