--- /dev/null
+/* stats */
+void stats_prefix_init(void);
+void stats_prefix_clear(void);
+void stats_prefix_record_get(const char *key, const size_t nkey, const bool is_hit);
+void stats_prefix_record_delete(const char *key, const size_t nkey);
+void stats_prefix_record_set(const char *key, const size_t nkey);
+/*@null@*/
+char *stats_prefix_dump(int *length);