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