/*
* Return an allocated lttng hashtable.
*/
LTTNG_HIDDEN
struct lttng_ht *lttng_ht_new(unsigned long size, int type)
{
struct lttng_ht *ht;
/* Test size */
if (!size)
size = DEFAULT_HT_SIZE;
pthread_mutex_lock(&seed_lock);
if (!seed_init) {
lttng_ht_seed = (unsigned long) time(NULL);
seed_init = true;
}
pthread_mutex_unlock(&seed_lock);
ht = zmalloc(sizeof(*ht));
if (ht == NULL) {
PERROR("zmalloc lttng_ht");
goto error;
}
ht->ht = cds_lfht_new(size, min_hash_alloc_size, max_hash_buckets_size,
CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
/*
* There is already an assert in the RCU hashtable code so if the ht is
* NULL here there is a *huge* problem.
*/
assert(ht->ht);
switch (type) {
case LTTNG_HT_TYPE_STRING:
ht->match_fct = match_str;
ht->hash_fct = hash_key_str;
break;
case LTTNG_HT_TYPE_ULONG:
ht->match_fct = match_ulong;
ht->hash_fct = hash_key_ulong;
break;
case LTTNG_HT_TYPE_U64:
ht->match_fct = match_u64;
ht->hash_fct = hash_key_u64;
break;
case LTTNG_HT_TYPE_TWO_U64:
ht->match_fct = match_two_u64;
ht->hash_fct = hash_key_two_u64;
break;
default:
ERR("Unknown lttng hashtable type %d", type);
lttng_ht_destroy(ht);
goto error;
}
DBG3("Created hashtable size %lu at %p of type %d", size, ht->ht, type);
return ht;
error:
return NULL;
}
UA_NodeStore * UA_NodeStore_new() {
UA_NodeStore *ns;
if(!(ns = UA_malloc(sizeof(UA_NodeStore))))
return NULL;
/* 32 is the minimum size for the hashtable. */
ns->ht = cds_lfht_new(32, 32, 0, CDS_LFHT_AUTO_RESIZE, NULL);
if(!ns->ht) {
UA_free(ns);
return NULL;
}
return ns;
}
