+struct libmemcached_io_vector_st
+{
+ size_t length;
+ const void *buffer;
+};
+
+LIBMEMCACHED_LOCAL
+memcached_return_t memcached_io_wait_for_write(memcached_server_write_instance_st ptr);
+
+LIBMEMCACHED_LOCAL
+ssize_t memcached_io_writev(memcached_server_write_instance_st ptr,
+ const struct libmemcached_io_vector_st *vector,
+ size_t number_of, bool with_flush);
+