Method serve_request

rpc/rpc.cpp:287–295

                return 0;
            }
            int serve_request()
            {
                sk->m_serving_count++;
                ResponseSender sender(this, &Context::response_sender);
                int ret = func(&request, sender, stream);
                sk->m_serving_count--;
                sk->m_cond_served.notify_all();
                return ret;
            }
            int response_sender(iovector* resp)
            {
                assert(w_lock);