/*
* returns a pointer to a table, or NULL if fails
*/
struct table *bucket_get_table(struct bucket *bucket, int64_t id, int flags) {
struct table *table;
int wrlocked;
if (bucket == NULL)
return NULL;
wrlocked = 0;
pthread_rwlock_rdlock(&bucket->rwlock);
again:
HASH_FIND_INT64(bucket->tables, &id, table);
if (table == NULL) {
if (wrlocked == 0) {
pthread_rwlock_unlock(&bucket->rwlock);
pthread_rwlock_wrlock(&bucket->rwlock);
wrlocked = 1;
goto again;
}
table = table_create_and_read(bucket, id, flags);
if (table)
HASH_ADD_INT64(bucket->tables, id, table);
}
pthread_rwlock_unlock(&bucket->rwlock);
return table;
}
struct schema *schema_get_from_hash(uint64_t hash, const char *bucket_name) {
struct schema *schema;
pthread_mutex_lock(&mutex);
HASH_FIND_INT64(schemas, &hash, schema);
if (schema == NULL) {
schema = schema_create_from_hash(hash, bucket_name);
if (schema)
HASH_ADD_INT64(schemas, hash, schema);
}
pthread_mutex_unlock(&mutex);
return schema;
}
struct lensum_hash* find_lens(struct lensum_hash* lensums, int64 id) {
// a single file reference, don't allocate
struct lensum_hash* alensum=NULL;
HASH_FIND_INT64(lensums, &id, alensum);
return alensum;
}
struct point_hash* point_hash_find(struct point_hash* self, int64 id) {
struct point_hash* pth=NULL;
HASH_FIND_INT64(self, &id, pth);
return pth;
}
