227 lines
6.5 KiB
C
227 lines
6.5 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 "namespace.h"
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include "un-namespace.h"
|
|
|
|
#include "thr_private.h"
|
|
|
|
/* Static variables: */
|
|
struct pthread_key _thread_keytable[PTHREAD_KEYS_MAX];
|
|
|
|
__weak_reference(_pthread_key_create, pthread_key_create);
|
|
__weak_reference(_pthread_key_delete, pthread_key_delete);
|
|
__weak_reference(_pthread_getspecific, pthread_getspecific);
|
|
__weak_reference(_pthread_setspecific, pthread_setspecific);
|
|
|
|
|
|
int
|
|
_pthread_key_create(pthread_key_t *key, void (*destructor) (void *))
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
int i;
|
|
|
|
/* Lock the key table: */
|
|
THR_LOCK_ACQUIRE(curthread, &_keytable_lock);
|
|
for (i = 0; i < PTHREAD_KEYS_MAX; i++) {
|
|
|
|
if (_thread_keytable[i].allocated == 0) {
|
|
_thread_keytable[i].allocated = 1;
|
|
_thread_keytable[i].destructor = destructor;
|
|
_thread_keytable[i].seqno++;
|
|
|
|
/* Unlock the key table: */
|
|
THR_LOCK_RELEASE(curthread, &_keytable_lock);
|
|
*key = i;
|
|
return (0);
|
|
}
|
|
|
|
}
|
|
/* Unlock the key table: */
|
|
THR_LOCK_RELEASE(curthread, &_keytable_lock);
|
|
return (EAGAIN);
|
|
}
|
|
|
|
int
|
|
_pthread_key_delete(pthread_key_t key)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
int ret = 0;
|
|
|
|
if ((unsigned int)key < PTHREAD_KEYS_MAX) {
|
|
/* Lock the key table: */
|
|
THR_LOCK_ACQUIRE(curthread, &_keytable_lock);
|
|
|
|
if (_thread_keytable[key].allocated)
|
|
_thread_keytable[key].allocated = 0;
|
|
else
|
|
ret = EINVAL;
|
|
|
|
/* Unlock the key table: */
|
|
THR_LOCK_RELEASE(curthread, &_keytable_lock);
|
|
} else
|
|
ret = EINVAL;
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
_thread_cleanupspecific(void)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
void (*destructor)( void *);
|
|
const void *data = NULL;
|
|
int key;
|
|
int i;
|
|
|
|
if (curthread->specific == NULL)
|
|
return;
|
|
|
|
/* Lock the key table: */
|
|
THR_LOCK_ACQUIRE(curthread, &_keytable_lock);
|
|
for (i = 0; (i < PTHREAD_DESTRUCTOR_ITERATIONS) &&
|
|
(curthread->specific_data_count > 0); i++) {
|
|
for (key = 0; (key < PTHREAD_KEYS_MAX) &&
|
|
(curthread->specific_data_count > 0); key++) {
|
|
destructor = NULL;
|
|
|
|
if (_thread_keytable[key].allocated &&
|
|
(curthread->specific[key].data != NULL)) {
|
|
if (curthread->specific[key].seqno ==
|
|
_thread_keytable[key].seqno) {
|
|
data = curthread->specific[key].data;
|
|
destructor = _thread_keytable[key].destructor;
|
|
}
|
|
curthread->specific[key].data = NULL;
|
|
curthread->specific_data_count--;
|
|
}
|
|
|
|
/*
|
|
* If there is a destructore, call it
|
|
* with the key table entry unlocked:
|
|
*/
|
|
if (destructor != NULL) {
|
|
/*
|
|
* Don't hold the lock while calling the
|
|
* destructor:
|
|
*/
|
|
THR_LOCK_RELEASE(curthread, &_keytable_lock);
|
|
destructor(__DECONST(void *, data));
|
|
THR_LOCK_ACQUIRE(curthread, &_keytable_lock);
|
|
}
|
|
}
|
|
}
|
|
THR_LOCK_RELEASE(curthread, &_keytable_lock);
|
|
free(curthread->specific);
|
|
curthread->specific = NULL;
|
|
if (curthread->specific_data_count > 0)
|
|
stderr_debug("Thread %p has exited with leftover "
|
|
"thread-specific data after %d destructor iterations\n",
|
|
curthread, PTHREAD_DESTRUCTOR_ITERATIONS);
|
|
}
|
|
|
|
static inline struct pthread_specific_elem *
|
|
pthread_key_allocate_data(void)
|
|
{
|
|
struct pthread_specific_elem *new_data;
|
|
|
|
new_data = (struct pthread_specific_elem *)
|
|
calloc(1, sizeof(struct pthread_specific_elem) * PTHREAD_KEYS_MAX);
|
|
return (new_data);
|
|
}
|
|
|
|
int
|
|
_pthread_setspecific(pthread_key_t key, const void *value)
|
|
{
|
|
struct pthread *pthread;
|
|
int ret = 0;
|
|
|
|
/* Point to the running thread: */
|
|
pthread = _get_curthread();
|
|
|
|
if ((pthread->specific) ||
|
|
(pthread->specific = pthread_key_allocate_data())) {
|
|
if ((unsigned int)key < PTHREAD_KEYS_MAX) {
|
|
if (_thread_keytable[key].allocated) {
|
|
if (pthread->specific[key].data == NULL) {
|
|
if (value != NULL)
|
|
pthread->specific_data_count++;
|
|
} else if (value == NULL)
|
|
pthread->specific_data_count--;
|
|
pthread->specific[key].data = value;
|
|
pthread->specific[key].seqno =
|
|
_thread_keytable[key].seqno;
|
|
ret = 0;
|
|
} else
|
|
ret = EINVAL;
|
|
} else
|
|
ret = EINVAL;
|
|
} else
|
|
ret = ENOMEM;
|
|
return (ret);
|
|
}
|
|
|
|
void *
|
|
_pthread_getspecific(pthread_key_t key)
|
|
{
|
|
struct pthread *pthread;
|
|
const void *data;
|
|
|
|
/* Point to the running thread: */
|
|
pthread = _get_curthread();
|
|
|
|
/* Check if there is specific data: */
|
|
if (pthread->specific != NULL && (unsigned int)key < PTHREAD_KEYS_MAX) {
|
|
/* Check if this key has been used before: */
|
|
if (_thread_keytable[key].allocated &&
|
|
(pthread->specific[key].seqno == _thread_keytable[key].seqno)) {
|
|
/* Return the value: */
|
|
data = pthread->specific[key].data;
|
|
} else {
|
|
/*
|
|
* This key has not been used before, so return NULL
|
|
* instead:
|
|
*/
|
|
data = NULL;
|
|
}
|
|
} else
|
|
/* No specific data has been created, so just return NULL: */
|
|
data = NULL;
|
|
return (__DECONST(void *, data));
|
|
}
|