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93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
/* ==== pthread_detach.c =======================================================
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* Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Chris Provenzano.
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* 4. The name of Chris Provenzano may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Description : pthread_join function.
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*
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* 1.00 94/01/15 proven
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* -Started coding this file.
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*/
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#ifndef lint
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static const char rcsid[] = "$Id$";
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#endif
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#include <errno.h>
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#include <pthread.h>
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/* ==========================================================================
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* pthread_detach()
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*/
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int pthread_detach(pthread_t pthread)
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{
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struct pthread * next_thread, * high_thread, * low_thread;
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int ret;
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pthread_sched_prevent();
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/* Check that thread isn't detached already */
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if (!(pthread->attr.flags & PTHREAD_DETACHED)) {
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pthread->attr.flags |= PTHREAD_DETACHED;
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/* Wakeup all threads waiting on a join */
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if (next_thread = pthread_queue_deq(&(pthread->join_queue))) {
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high_thread = next_thread;
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while (next_thread = pthread_queue_deq(&(pthread->join_queue))) {
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if (high_thread->pthread_priority < next_thread->pthread_priority) {
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low_thread = high_thread;
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high_thread = next_thread;
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} else {
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low_thread = next_thread;
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}
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pthread_prio_queue_enq(pthread_current_prio_queue, low_thread);
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low_thread->state = PS_RUNNING;
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}
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/* If the thread is dead then move it to the alloc queue */
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if (pthread_queue_remove(&pthread_dead_queue, pthread) == OK) {
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pthread_queue_enq(&pthread_alloc_queue, pthread);
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}
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pthread_sched_other_resume(high_thread);
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return(OK);
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}
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/* If the thread is dead then move it to the alloc queue */
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if (pthread_queue_remove(&pthread_dead_queue, pthread) == OK) {
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pthread_queue_enq(&pthread_alloc_queue, pthread);
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pthread->state = PS_UNALLOCED;
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}
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ret = OK;
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} else {
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ret = ESRCH;
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}
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pthread_sched_resume();
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return(ret);
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}
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