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 * $FreeBSD$ 33 */ 34 #include <errno.h> 35 #include <pthread.h> 36 #include "thr_private.h" 37 38 __weak_reference(_pthread_detach, pthread_detach); 39 40 int 41 _pthread_detach(pthread_t pthread) 42 { 43 if (pthread == NULL || pthread->magic != PTHREAD_MAGIC) 44 return (EINVAL); 45 46 if (pthread->attr.flags & PTHREAD_DETACHED) 47 return (EINVAL); 48 49 pthread->attr.flags |= PTHREAD_DETACHED; 50 51 /* 52 * Defer signals to protect the scheduling queues from 53 * access by the signal handler: 54 */ 55 GIANT_LOCK(curthread); 56 57 /* Check if there is a joiner: */ 58 if (pthread->joiner != NULL) { 59 struct pthread *joiner = pthread->joiner; 60 61 /* Make the thread runnable: */ 62 PTHREAD_NEW_STATE(joiner, PS_RUNNING); 63 64 /* Set the return value for the woken thread: */ 65 joiner->join_status.error = ESRCH; 66 joiner->join_status.ret = NULL; 67 joiner->join_status.thread = NULL; 68 69 /* 70 * Disconnect the joiner from the thread being detached: 71 */ 72 pthread->joiner = NULL; 73 } 74 75 GIANT_UNLOCK(curthread); 76 77 return (0); 78 } 79