diff options
Diffstat (limited to 'lib/libthr/thread/thr_detach.c')
-rw-r--r-- | lib/libthr/thread/thr_detach.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_detach.c b/lib/libthr/thread/thr_detach.c new file mode 100644 index 0000000..ca1b473 --- /dev/null +++ b/lib/libthr/thread/thr_detach.c @@ -0,0 +1,82 @@ +/* + * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by John Birrell. + * 4. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ +#include <errno.h> +#include <pthread.h> +#include "thr_private.h" + +__weak_reference(_pthread_detach, pthread_detach); + +int +_pthread_detach(pthread_t pthread) +{ + pthread_t curthread; + + if (pthread == NULL || pthread->magic != PTHREAD_MAGIC) + return (EINVAL); + + if (pthread->attr.flags & PTHREAD_DETACHED) + return (EINVAL); + + curthread = _get_curthread(); + + pthread->attr.flags |= PTHREAD_DETACHED; + + /* + * Defer signals to protect the scheduling queues from + * access by the signal handler: + */ + GIANT_LOCK(curthread); + + /* Check if there is a joiner: */ + if (pthread->joiner != NULL) { + struct pthread *joiner = pthread->joiner; + + /* Make the thread runnable: */ + PTHREAD_NEW_STATE(joiner, PS_RUNNING); + + /* Set the return value for the woken thread: */ + joiner->join_status.error = ESRCH; + joiner->join_status.ret = NULL; + joiner->join_status.thread = NULL; + + /* + * Disconnect the joiner from the thread being detached: + */ + pthread->joiner = NULL; + } + + GIANT_UNLOCK(curthread); + + return (0); +} |