-ssize_t memcached_io_writev(memcached_server_write_instance_st ptr,
- libmemcached_io_vector_st vector[],
- const size_t number_of, const bool with_flush);
+bool memcached_io_writev(org::libmemcached::Instance* ptr,
+ libmemcached_io_vector_st vector[],
+ const size_t number_of, const bool with_flush);