diff options
Diffstat (limited to 'lib/libpthread/thread/thr_join.c')
| -rw-r--r-- | lib/libpthread/thread/thr_join.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/lib/libpthread/thread/thr_join.c b/lib/libpthread/thread/thr_join.c deleted file mode 100644 index 2396034..0000000 --- a/lib/libpthread/thread/thr_join.c +++ /dev/null @@ -1,162 +0,0 @@ -/* - * 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. 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" - -LT10_COMPAT_PRIVATE(_pthread_join); -LT10_COMPAT_DEFAULT(pthread_join); - -__weak_reference(_pthread_join, pthread_join); - -int -_pthread_join(pthread_t pthread, void **thread_return) -{ - struct pthread *curthread = _get_curthread(); - void *tmp; - kse_critical_t crit; - int ret = 0; - - _thr_cancel_enter(curthread); - - /* Check if the caller has specified an invalid thread: */ - if (pthread == NULL || pthread->magic != THR_MAGIC) { - /* Invalid thread: */ - _thr_cancel_leave(curthread, 1); - return (EINVAL); - } - - /* Check if the caller has specified itself: */ - if (pthread == curthread) { - /* Avoid a deadlock condition: */ - _thr_cancel_leave(curthread, 1); - return (EDEADLK); - } - - /* - * Find the thread in the list of active threads or in the - * list of dead threads: - */ - if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/1)) != 0) { - /* Return an error: */ - _thr_cancel_leave(curthread, 1); - return (ESRCH); - } - - THR_SCHED_LOCK(curthread, pthread); - /* Check if this thread has been detached: */ - if ((pthread->attr.flags & PTHREAD_DETACHED) != 0) { - THR_SCHED_UNLOCK(curthread, pthread); - /* Remove the reference and return an error: */ - _thr_ref_delete(curthread, pthread); - ret = EINVAL; - } else { - /* Lock the target thread while checking its state. */ - if (pthread->state == PS_DEAD) { - /* Return the thread's return value: */ - tmp = pthread->ret; - - /* Detach the thread. */ - pthread->attr.flags |= PTHREAD_DETACHED; - - /* Unlock the thread. */ - THR_SCHED_UNLOCK(curthread, pthread); - - /* - * Remove the thread from the list of active - * threads and add it to the GC list. - */ - crit = _kse_critical_enter(); - KSE_LOCK_ACQUIRE(curthread->kse, &_thread_list_lock); - THR_LIST_REMOVE(pthread); - THR_GCLIST_ADD(pthread); - KSE_LOCK_RELEASE(curthread->kse, &_thread_list_lock); - _kse_critical_leave(crit); - - /* Remove the reference. */ - _thr_ref_delete(curthread, pthread); - if (thread_return != NULL) - *thread_return = tmp; - } - else if (pthread->joiner != NULL) { - /* Unlock the thread and remove the reference. */ - THR_SCHED_UNLOCK(curthread, pthread); - _thr_ref_delete(curthread, pthread); - - /* Multiple joiners are not supported. */ - ret = ENOTSUP; - } - else { - /* Set the running thread to be the joiner: */ - pthread->joiner = curthread; - - /* Keep track of which thread we're joining to: */ - curthread->join_status.thread = pthread; - - /* Unlock the thread and remove the reference. */ - THR_SCHED_UNLOCK(curthread, pthread); - _thr_ref_delete(curthread, pthread); - - THR_SCHED_LOCK(curthread, curthread); - while (curthread->join_status.thread == pthread) { - THR_SET_STATE(curthread, PS_JOIN); - THR_SCHED_UNLOCK(curthread, curthread); - /* Schedule the next thread: */ - _thr_sched_switch(curthread); - THR_SCHED_LOCK(curthread, curthread); - } - THR_SCHED_UNLOCK(curthread, curthread); - - if ((curthread->cancelflags & THR_CANCELLING) && - !(curthread->cancelflags & PTHREAD_CANCEL_DISABLE)) { - if (_thr_ref_add(curthread, pthread, 1) == 0) { - THR_SCHED_LOCK(curthread, pthread); - pthread->joiner = NULL; - THR_SCHED_UNLOCK(curthread, pthread); - _thr_ref_delete(curthread, pthread); - } - pthread_exit(PTHREAD_CANCELED); - } - - /* - * The thread return value and error are set by the - * thread we're joining to when it exits or detaches: - */ - ret = curthread->join_status.error; - if ((ret == 0) && (thread_return != NULL)) - *thread_return = curthread->join_status.ret; - } - } - _thr_cancel_leave(curthread, 1); - - /* Return the completion status: */ - return (ret); -} |
