diff options
Diffstat (limited to 'mit-pthreads/pthreads/pthread_detach.c')
| -rw-r--r-- | mit-pthreads/pthreads/pthread_detach.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/mit-pthreads/pthreads/pthread_detach.c b/mit-pthreads/pthreads/pthread_detach.c new file mode 100644 index 00000000000..d3ae8c03bb3 --- /dev/null +++ b/mit-pthreads/pthreads/pthread_detach.c @@ -0,0 +1,92 @@ +/* ==== pthread_detach.c ======================================================= + * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu + * 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 Chris Provenzano. + * 4. The name of Chris Provenzano may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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. + * + * Description : pthread_join function. + * + * 1.00 94/01/15 proven + * -Started coding this file. + */ + +#ifndef lint +static const char rcsid[] = "$Id$"; +#endif + +#include <errno.h> +#include <pthread.h> + +/* ========================================================================== + * pthread_detach() + */ +int pthread_detach(pthread_t pthread) +{ + struct pthread * next_thread, * high_thread, * low_thread; + int ret; + + pthread_sched_prevent(); + + /* Check that thread isn't detached already */ + if (!(pthread->attr.flags & PTHREAD_DETACHED)) { + + pthread->attr.flags |= PTHREAD_DETACHED; + + /* Wakeup all threads waiting on a join */ + if (next_thread = pthread_queue_deq(&(pthread->join_queue))) { + high_thread = next_thread; + + while (next_thread = pthread_queue_deq(&(pthread->join_queue))) { + if (high_thread->pthread_priority < next_thread->pthread_priority) { + low_thread = high_thread; + high_thread = next_thread; + } else { + low_thread = next_thread; + } + pthread_prio_queue_enq(pthread_current_prio_queue, low_thread); + low_thread->state = PS_RUNNING; + } + /* If the thread is dead then move it to the alloc queue */ + if (pthread_queue_remove(&pthread_dead_queue, pthread) == OK) { + pthread_queue_enq(&pthread_alloc_queue, pthread); + } + pthread_sched_other_resume(high_thread); + return(OK); + } + /* If the thread is dead then move it to the alloc queue */ + if (pthread_queue_remove(&pthread_dead_queue, pthread) == OK) { + pthread_queue_enq(&pthread_alloc_queue, pthread); + pthread->state = PS_UNALLOCED; + } + ret = OK; + } else { + ret = ESRCH; + } + pthread_sched_resume(); + return(ret); +} |