-list_t * ll_alloc (const datatype_t *key_type);
-uint64_t ll_cas (list_t *ll, void *key, uint64_t expected_val, uint64_t new_val);
-uint64_t ll_lookup (list_t *ll, void *key);
-uint64_t ll_remove (list_t *ll, void *key);
-uint64_t ll_count (list_t *ll);
-void ll_print (list_t *ll);
-void ll_free (list_t *ll);
+list_t * ll_alloc (const datatype_t *key_type);
+map_val_t ll_cas (list_t *ll, map_key_t key, map_val_t expected_val, map_val_t new_val);
+map_val_t ll_lookup (list_t *ll, map_key_t key);
+map_val_t ll_remove (list_t *ll, map_key_t key);
+size_t ll_count (list_t *ll);
+void ll_print (list_t *ll);
+void ll_free (list_t *ll);
+map_key_t ll_min_key (list_t *sl);
+
+ll_iter_t * ll_iter_begin (list_t *ll, map_key_t key);
+map_val_t ll_iter_next (ll_iter_t *iter, map_key_t *key_ptr);
+void ll_iter_free (ll_iter_t *iter);