ptr->io_bytes_sent= 0;
ptr->write_buffer_offset= size_t(ptr->root and memcached_is_udp(ptr->root) ? UDP_DATAGRAM_HEADER_LENGTH : 0);
ptr->read_buffer_length= 0;
ptr->io_bytes_sent= 0;
ptr->write_buffer_offset= size_t(ptr->root and memcached_is_udp(ptr->root) ? UDP_DATAGRAM_HEADER_LENGTH : 0);
ptr->read_buffer_length= 0;