9e49a2370c
except the function will return ETIMEDOUT if target thread does not exit before specified absolute time passes.
146 lines
4.2 KiB
C
146 lines
4.2 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"
|
|
|
|
static int join_common(pthread_t, void **, const struct timespec *);
|
|
|
|
__weak_reference(_pthread_join, pthread_join);
|
|
__weak_reference(_pthread_timedjoin_np, pthread_timedjoin_np);
|
|
|
|
static void backout_join(void *arg)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
struct pthread *pthread = (struct pthread *)arg;
|
|
|
|
THREAD_LIST_LOCK(curthread);
|
|
pthread->joiner = NULL;
|
|
THREAD_LIST_UNLOCK(curthread);
|
|
}
|
|
|
|
int
|
|
_pthread_join(pthread_t pthread, void **thread_return)
|
|
{
|
|
return (join_common(pthread, thread_return, NULL));
|
|
}
|
|
|
|
int
|
|
_pthread_timedjoin_np(pthread_t pthread, void **thread_return,
|
|
const struct timespec *abstime)
|
|
{
|
|
if (abstime == NULL || abstime->tv_sec < 0 || abstime->tv_nsec < 0 ||
|
|
abstime->tv_nsec >= 1000000000)
|
|
return (EINVAL);
|
|
|
|
return (join_common(pthread, thread_return, abstime));
|
|
}
|
|
|
|
static int
|
|
join_common(pthread_t pthread, void **thread_return,
|
|
const struct timespec *abstime)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
struct timespec ts, ts2, *tsp;
|
|
void *tmp;
|
|
long state;
|
|
int oldcancel;
|
|
int ret = 0;
|
|
|
|
if (pthread == NULL)
|
|
return (EINVAL);
|
|
|
|
if (pthread == curthread)
|
|
return (EDEADLK);
|
|
|
|
THREAD_LIST_LOCK(curthread);
|
|
if ((ret = _thr_find_thread(curthread, pthread, 1)) != 0) {
|
|
ret = ESRCH;
|
|
} else if ((pthread->tlflags & TLFLAGS_DETACHED) != 0) {
|
|
ret = ESRCH;
|
|
} else if (pthread->joiner != NULL) {
|
|
/* Multiple joiners are not supported. */
|
|
ret = ENOTSUP;
|
|
}
|
|
if (ret) {
|
|
THREAD_LIST_UNLOCK(curthread);
|
|
return (ret);
|
|
}
|
|
/* Set the running thread to be the joiner: */
|
|
pthread->joiner = curthread;
|
|
|
|
THREAD_LIST_UNLOCK(curthread);
|
|
|
|
THR_CLEANUP_PUSH(curthread, backout_join, pthread);
|
|
oldcancel = _thr_cancel_enter(curthread);
|
|
|
|
while ((state = pthread->state) != PS_DEAD) {
|
|
if (abstime != NULL) {
|
|
clock_gettime(CLOCK_REALTIME, &ts);
|
|
TIMESPEC_SUB(&ts2, abstime, &ts);
|
|
if (ts2.tv_sec < 0) {
|
|
ret = ETIMEDOUT;
|
|
break;
|
|
}
|
|
tsp = &ts2;
|
|
} else
|
|
tsp = NULL;
|
|
ret = _thr_umtx_wait(&pthread->state, state, tsp);
|
|
if (ret == ETIMEDOUT)
|
|
break;
|
|
}
|
|
|
|
_thr_cancel_leave(curthread, oldcancel);
|
|
THR_CLEANUP_POP(curthread, 0);
|
|
|
|
if (ret == ETIMEDOUT) {
|
|
THREAD_LIST_LOCK(curthread);
|
|
pthread->joiner = NULL;
|
|
THREAD_LIST_UNLOCK(curthread);
|
|
} else {
|
|
tmp = pthread->ret;
|
|
THREAD_LIST_LOCK(curthread);
|
|
pthread->tlflags |= TLFLAGS_DETACHED;
|
|
pthread->joiner = NULL;
|
|
THR_GCLIST_ADD(pthread);
|
|
THREAD_LIST_UNLOCK(curthread);
|
|
|
|
if (thread_return != NULL)
|
|
*thread_return = tmp;
|
|
}
|
|
return (ret);
|
|
}
|