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  * $DragonFly: src/lib/libthread_xu/thread/thr_detach.c,v 1.4 2006/04/06 13:03:09 davidxu Exp $
33  */
34 
35 #include "namespace.h"
36 #include <machine/tls.h>
37 
38 #include <errno.h>
39 #include <pthread.h>
40 #include "un-namespace.h"
41 
42 #include "thr_private.h"
43 
44 int
45 _pthread_detach(pthread_t pthread)
46 {
47 	struct pthread *curthread = tls_get_curthread();
48 	int rval;
49 
50 	if (pthread == NULL)
51 		return (EINVAL);
52 
53 	THREAD_LIST_LOCK(curthread);
54 	if ((rval = _thr_find_thread(curthread, pthread,
55 			/*include dead*/1)) != 0) {
56 		THREAD_LIST_UNLOCK(curthread);
57 		return (rval);
58 	}
59 
60 	/* Check if the thread is already detached or has a joiner. */
61 	if ((pthread->tlflags & TLFLAGS_DETACHED) != 0 ||
62 	    (pthread->joiner != NULL)) {
63 		THREAD_LIST_UNLOCK(curthread);
64 		return (EINVAL);
65 	}
66 
67 	/* Flag the thread as detached. */
68 	pthread->tlflags |= TLFLAGS_DETACHED;
69 	if (pthread->state == PS_DEAD)
70 		THR_GCLIST_ADD(pthread);
71 	THREAD_LIST_UNLOCK(curthread);
72 
73 	return (0);
74 }
75 
76 __strong_reference(_pthread_detach, pthread_detach);
77