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/* $OpenBSD: uthread_detach.c,v 1.7 2001/12/11 00:19:47 fgsch Exp $ */
/*
* 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: uthread_detach.c,v 1.10 1999/08/28 00:03:28 peter Exp $
*/
#include <errno.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
int
pthread_detach(pthread_t pthread)
{
int rval = 0;
/* Check for invalid calling parameters: */
if (pthread == NULL || pthread->magic != PTHREAD_MAGIC)
/* Return an invalid argument error: */
rval = EINVAL;
/* Check if the thread has not been detached: */
else if ((pthread->attr.flags & PTHREAD_DETACHED) == 0) {
/* Flag the thread as detached: */
pthread->attr.flags |= PTHREAD_DETACHED;
/*
* Defer signals to protect the scheduling queues from
* access by the signal handler:
*/
_thread_kern_sig_defer();
/* 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->error = ESRCH;
/*
* Disconnect the joiner from the thread being detached:
*/
pthread->joiner = NULL;
}
/*
* Undefer and handle pending signals, yielding if a
* scheduling signal occurred while in the critical region.
*/
_thread_kern_sig_undefer();
} else
/* Return an error: */
rval = EINVAL;
/* Return the completion status: */
return (rval);
}
#endif
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