static void Main(string[] args)
        {
            IntPtr loop = uv.uv_default_loop();

            IntPtr address = alloc(4);

            uv.uv_ip4_addr("0.0.0.0", 5000, address);

            IntPtr server = alloc(uv.uv_handle_size(uv.handle_type.UV_TCP));

            uv.uv_tcp_init(loop, server);

            uv.uv_tcp_bind(server, address);

            var r = uv.uv_listen(server, 128, (val, status) =>
            {
                Console.WriteLine("got connection");

                var client = alloc(uv.uv_handle_size(uv.handle_type.UV_TCP));

                uv.uv_tcp_init(loop, client);

                uv.uv_accept(server, client);

                uv.uv_read_start(client, (handle, suggested_size, buf) =>
                {
                    Console.WriteLine("alloc_callback");

                    Console.WriteLine("handle: {0}", handle);

                    Console.WriteLine("suggested_size: {0}", suggested_size);

                    var _buf   = (uv.uv_buf_t)Marshal.PtrToStructure(buf, typeof(uv.uv_buf_t));

                    _buf.@base = alloc(suggested_size);

                    _buf.len   = suggested_size;

                }, (stream, nread, buf) =>
                {
                    Console.WriteLine("read_callback");

                    Console.WriteLine("stream: {0}", stream);

                    Console.WriteLine("nread: {0}", nread);

                    var _buf = (uv.uv_buf_t)Marshal.PtrToStructure(buf, typeof(uv.uv_buf_t));

                    Console.WriteLine("buf: {0}", _buf.len);
                });

                //uv.uv_close(client, (handle) =>
                //{
                //    Console.WriteLine(handle);
                //});
            });

            uv.uv_run(loop, uv.uv_run_mode.UV_RUN_DEFAULT);

            Console.ReadLine();
        }