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, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  */
27 
28 #include "namespace.h"
29 #include <machine/tls.h>
30 #include <errno.h>
31 #include <pthread.h>
32 #include "un-namespace.h"
33 
34 #include "thr_private.h"
35 
36 int
37 _pthread_detach(pthread_t pthread)
38 {
39 	pthread_t curthread = tls_get_curthread();
40 	int rval;
41 
42 	if (pthread == NULL)
43 		return (EINVAL);
44 
45 	THREAD_LIST_LOCK(curthread);
46 	if ((rval = _thr_find_thread(curthread, pthread,
47 			/*include dead*/1)) != 0) {
48 		THREAD_LIST_UNLOCK(curthread);
49 		return (rval);
50 	}
51 
52 	/* Check if the thread is already detached or has a joiner. */
53 	if ((pthread->tlflags & TLFLAGS_DETACHED) != 0 ||
54 	    (pthread->joiner != NULL)) {
55 		THREAD_LIST_UNLOCK(curthread);
56 		return (EINVAL);
57 	}
58 
59 	/* Flag the thread as detached. */
60 	pthread->tlflags |= TLFLAGS_DETACHED;
61 	if (pthread->state == PS_DEAD)
62 		THR_GCLIST_ADD(pthread);
63 	THREAD_LIST_UNLOCK(curthread);
64 
65 	return (0);
66 }
67 
68 __strong_reference(_pthread_detach, pthread_detach);
69