-map_t * map_alloc (map_type_e map_type);
-void map_free (map_t *map);
-void map_print (map_t *map);
-uint64_t map_stat (map_t *map, map_stat_e stat_type);
+typedef const struct map_impl *map_type_t;
+
+extern map_type_t MAP_TYPE_HASHTABLE;
+extern map_type_t MAP_TYPE_SKIPLIST;
+extern map_type_t MAP_TYPE_LIST;
uint64_t map_get (map_t *map, const void *key_data, uint32_t key_len);
uint64_t map_set (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_add (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_cas (map_t *map, const void *key_data, uint32_t key_len, uint64_t expected_val, uint64_t new_val);
uint64_t map_replace(map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_remove (map_t *map, const void *key_data, uint32_t key_len);
uint64_t map_get (map_t *map, const void *key_data, uint32_t key_len);
uint64_t map_set (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_add (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_cas (map_t *map, const void *key_data, uint32_t key_len, uint64_t expected_val, uint64_t new_val);
uint64_t map_replace(map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val);
uint64_t map_remove (map_t *map, const void *key_data, uint32_t key_len);