-uint64_t map_stat (map_t *map, map_stat_e stat_type);
-
-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);
+void map_free (map_t *map);
+
+/////////////////////////////////////////////////////////////////////////////////////
+
+#define CAS_EXPECT_DOES_NOT_EXIST ( 0)
+#define CAS_EXPECT_EXISTS (-1)
+#define CAS_EXPECT_WHATEVER (-2)
+
+typedef void * (*map_alloc_t) (const datatype_t *);
+typedef uint64_t (*map_cas_t) (void *, void *, uint64_t, uint64_t);
+typedef uint64_t (*map_get_t) (void *, void *);
+typedef uint64_t (*map_remove_t) (void *, void *);
+typedef uint64_t (*map_count_t) (void *);
+typedef void (*map_print_t) (void *);
+typedef void (*map_free_t) (void *);
+
+struct map_impl {
+ map_alloc_t alloc;
+ map_cas_t cas;
+ map_get_t get;
+ map_remove_t remove;
+ map_count_t count;
+ map_print_t print;
+ map_free_t free_;
+};