+ht_iter_t * ht_iter_begin (hashtable_t *ht, map_key_t key);
+uint64_t ht_iter_next (ht_iter_t *iter, map_key_t *key_ptr);
+void ht_iter_free (ht_iter_t *iter);
+
+static const map_impl_t ht_map_impl = {
+ (map_alloc_t)ht_alloc, (map_cas_t)ht_cas, (map_get_t)ht_get, (map_remove_t)ht_remove,
+ (map_count_t)ht_count, (map_print_t)ht_print, (map_free_t)ht_free, (map_iter_begin_t)ht_iter_begin,
+ (map_iter_next_t)ht_iter_next, (map_iter_free_t)ht_iter_free
+};
+