thr_detach.c revision 35008 
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 REGENTS 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 */
33#include <errno.h>
34#ifdef _THREAD_SAFE
35#include <pthread.h>
36#include "pthread_private.h"
37
38int
39pthread_detach(pthread_t pthread)
40{
41	int             rval = 0;
42	int             status;
43	pthread_t       next_thread;
44
45	/* Block signals: */
46	_thread_kern_sig_block(&status);
47
48	/* Check for invalid calling parameters: */
49	if (pthread == NULL || pthread->magic != PTHREAD_MAGIC) {
50		/* Return an invalid argument error: */
51		rval = EINVAL;
52	}
53	/* Check if the thread has not been detached: */
54	else if ((pthread->attr.flags & PTHREAD_DETACHED) == 0) {
55		/* Flag the thread as detached: */
56		pthread->attr.flags |= PTHREAD_DETACHED;
57
58		/* Enter a loop to bring all threads off the join queue: */
59		while ((next_thread = _thread_queue_deq(&pthread->join_queue)) != NULL) {
60			/* Make the thread run: */
61			PTHREAD_NEW_STATE(next_thread,PS_RUNNING);
62		}
63	} else {
64		/* Return an error: */
65		rval = EINVAL;
66	}
67
68	/* Unblock signals: */
69	_thread_kern_sig_unblock(status);
70
71	/* Return the completion status: */
72	return (rval);
73}
74#endif
75