memcached_return memcached_do(memcached_st *ptr, unsigned int server_key, char *commmand,
size_t command_length, char with_flush);
memcached_return memcached_version(memcached_st *ptr);
memcached_return memcached_do(memcached_st *ptr, unsigned int server_key, char *commmand,
size_t command_length, char with_flush);
memcached_return memcached_version(memcached_st *ptr);