cmd/nscd/nscd_access.c

37  * be used to allocate memory that requires access control or usage
38  * count control, will initialize this access control structure at the
59 	if (access->data != data) \
63 		access = (nscd_access_t *) \
71  * Decrements the usage count maintained in the access data
79 	nscd_access_t	*access;
88 		(me, "data = %p, access->data = %p, "
90 		data, access->data, access->seq_num, access->nUse);
93 	(void) mutex_lock(&access->mutex);
94 	access->nUse--;
95 	if (access->nUse < 0) {
99 	if (access->nUse <= 0 &&
100 		access->delete == 1) {
103 		(me, "deleting data %p\n", access->data);
104 		(access->free_func)(access->data);
108 		 * holding the access->mutex lock, It is safe
114 		(void) mutex_unlock(&access->mutex);
134 	nscd_access_t	*access;
143 	(me, "data = %p, access->data = %p\n", data, access->data);
146 	(void) mutex_lock(&access->mutex);
147 	access->delete = 1;
148 	(void) mutex_unlock(&access->mutex);
163 	nscd_access_t	*access;
174 	(me, "data = %p, access->data = %p, seq#= %lld, nUse = %d\n",
175 		data, access->data, access->seq_num, access->nUse);
183 	 * to prevent the access data from being
187 			access->seq_num)) == NULL) {
194 	(void) mutex_lock(&access->mutex);
195 	if (access->delete == 1)
198 		access->nUse++;
199 	(void) mutex_unlock(&access->mutex);
255 	nscd_access_t	*access;
267 	(me, "data = %p, access->data = %p\n", data, access->data);
270 	assert(access->data_rwlock != NULL);
272 	(void) rw_rdlock(access->data_rwlock);
288 	nscd_access_t	*access;
300 	(me, "data = %p, access->data = %p\n", data, access->data);
303 	assert(access->data_rwlock != NULL);
305 	(void) rw_wrlock(access->data_rwlock);
319 	nscd_access_t	*access;
328 	(me, "data = %p, access->data = %p\n",
329 		data, access->data);
332 	assert(access->data_rwlock != NULL);
334 	(void) rw_unlock(access->data_rwlock);
349 	nscd_access_t	*access;
357 	assert(access->data_rwlock != NULL);
359 	(void) rw_unlock(access->data_rwlock);
373 	nscd_access_t	*access;
385 	(me, "data = %p, access->data = %p\n", data, access->data);
388 	assert(access->data_mutex != NULL);
390 	(void) mutex_lock(access->data_mutex);
405 	nscd_access_t	*access;
414 	(me, "data = %p, access->data = %p\n", data, access->data);
417 	assert(access->data_mutex != NULL);
419 	(void) mutex_unlock(access->data_mutex);
433 	nscd_access_t	*access;
442 	(me, "data = %p, access->data = %p\n", data, access->data);
445 	assert(access->data_cond != NULL && access->data_mutex != NULL);
448 		(void) cond_wait(access->data_cond, access->data_mutex);
450 		(void) cond_wait(cond, access->data_mutex);
462 	nscd_access_t	*access;
471 	(me, "data = %p, access->data = %p\n", data, access->data);
474 	assert(access->data_cond != NULL);
476 	(void) cond_signal(access->data_cond);
496 	nscd_access_t	*access;
537 	access = (nscd_access_t *)ptr;
538 	access->data = (char *)ptr + sizeof_access;
539 	access->data_mutex = mutex;
540 	access->data_rwlock = rwlock;
541 	access->data_cond = cond;
542 	access->nUse = 0;
543 	access->delete = 0;
544 	access->type = type;
545 	access->free_func = data_free;
546 	access->seq_num = seq_num;
549 	if (_nscd_add_int_addr(access->data, type,
555 	return (access->data);
567 	nscd_access_t	*access;
576 	_nscd_del_int_addr(access->data, access->seq_num);
578 	if (access->data_mutex)
579 		free(access->data_mutex);
580 	if (access->data_rwlock)
581 		free(access->data_rwlock);
582 	if (access->data_cond)
583 		free(access->data_cond);
585 	(void) memset(access, 0, sizeof (*access));
587 	free(access);