2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 * $FreeBSD: src/lib/libc_r/uthread/uthread_detach.c,v 1.11.2.4 2002/10/22 14:44:03 fjoe Exp $
36 #include "pthread_private.h"
38 __weak_reference(_pthread_detach, pthread_detach);
41 _pthread_detach(pthread_t pthread)
45 /* Check for invalid calling parameters: */
46 if (pthread == NULL || pthread->magic != PTHREAD_MAGIC)
47 /* Return an invalid argument error: */
50 /* Check if the thread has not been detached: */
51 else if ((pthread->attr.flags & PTHREAD_DETACHED) == 0) {
52 /* Flag the thread as detached: */
53 pthread->attr.flags |= PTHREAD_DETACHED;
56 * Defer signals to protect the scheduling queues from
57 * access by the signal handler:
59 _thread_kern_sig_defer();
61 /* Check if there is a joiner: */
62 if (pthread->joiner != NULL) {
63 struct pthread *joiner = pthread->joiner;
65 /* Make the thread runnable: */
66 PTHREAD_NEW_STATE(joiner, PS_RUNNING);
68 /* Set the return value for the woken thread: */
69 joiner->join_status.error = ESRCH;
70 joiner->join_status.ret = NULL;
71 joiner->join_status.thread = NULL;
74 * Disconnect the joiner from the thread being detached:
76 pthread->joiner = NULL;
80 * Undefer and handle pending signals, yielding if a
81 * scheduling signal occurred while in the critical region.
83 _thread_kern_sig_undefer();
85 /* Return an error: */
88 /* Return the completion status: */