-memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_length,
- time_t expiration);
+ memcached_return
+ memcached_delete (memcached_st *ptr,
+ char *key, size_t key_length,
+ time_t expiration);
+
+ memcached_return
+ memcached_delete_by_key (memcached_st *ptr,
+ char *master_key, size_t master_key_length,
+ char *key, size_t key_length,
+ time_t expiration);