a0240e2cb0
environment. This includes support for multiple KSEs and KSEGs. The ability to create more than 1 KSE via pthread_setconcurrency() is in the works as well as support for PTHREAD_SCOPE_SYSTEM threads. Those should come shortly. There are still some known issues which davidxu and I are working on, but it'll make it easier for us by committing what we have. This library now passes all of the ACE tests that libc_r passes with the exception of one. It also seems to work OK with KDE including konqueror, kwrite, etc. I haven't been able to get mozilla to run due to lack of java plugin, so I'd be interested to see how it works with that. Reviewed by: davidxu
133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/*
|
|
* 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_join, pthread_join);
|
|
|
|
int
|
|
_pthread_join(pthread_t pthread, void **thread_return)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
int ret = 0;
|
|
|
|
_thr_enter_cancellation_point(curthread);
|
|
|
|
/* Check if the caller has specified an invalid thread: */
|
|
if (pthread == NULL || pthread->magic != THR_MAGIC) {
|
|
/* Invalid thread: */
|
|
_thr_leave_cancellation_point(curthread);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Check if the caller has specified itself: */
|
|
if (pthread == curthread) {
|
|
/* Avoid a deadlock condition: */
|
|
_thr_leave_cancellation_point(curthread);
|
|
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_leave_cancellation_point(curthread);
|
|
return (ESRCH);
|
|
}
|
|
|
|
/* Check if this thread has been detached: */
|
|
if ((pthread->attr.flags & PTHREAD_DETACHED) != 0) {
|
|
/* Remove the reference and return an error: */
|
|
_thr_ref_delete(curthread, pthread);
|
|
ret = ESRCH;
|
|
} else {
|
|
/* Lock the target thread while checking its state. */
|
|
THR_SCHED_LOCK(curthread, pthread);
|
|
if ((pthread->state == PS_DEAD) ||
|
|
((pthread->flags & THR_FLAGS_EXITING) != 0)) {
|
|
if (thread_return != NULL)
|
|
/* Return the thread's return value: */
|
|
*thread_return = pthread->ret;
|
|
|
|
/* Unlock the thread and remove the reference. */
|
|
THR_SCHED_UNLOCK(curthread, pthread);
|
|
_thr_ref_delete(curthread, pthread);
|
|
}
|
|
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);
|
|
if (curthread->join_status.thread == pthread)
|
|
THR_SET_STATE(curthread, PS_JOIN);
|
|
THR_SCHED_UNLOCK(curthread, curthread);
|
|
|
|
while (curthread->join_status.thread == pthread) {
|
|
/* Schedule the next thread: */
|
|
_thr_sched_switch(curthread);
|
|
}
|
|
|
|
/*
|
|
* 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_leave_cancellation_point(curthread);
|
|
|
|
/* Return the completion status: */
|
|
return (ret);
|
|
}
|