Microsoft.R.Host.Client.RHost.RunWorker C# (CSharp) Method

        private async Task RunWorker(CancellationToken ct) {
            TaskUtilities.AssertIsOnBackgroundThread();

            // Spin until the worker task is registered.
            while (_runTask == null) {
                await Task.Yield();
            }

            try {
                var message = await ReceiveMessageAsync(ct);
                if (message == null || !message.IsNotification || message.Name != "!Microsoft.R.Host") {
                    throw ProtocolError($"Microsoft.R.Host handshake expected:", message);
                }

                var protocolVersion = message.GetInt32(0, "protocol_version");
                if (protocolVersion != 1) {
                    throw ProtocolError($"Unsupported RHost protocol version:", message);
                }

                var rVersion = message.GetString(1, "R_version");
                await _callbacks.Connected(rVersion);

                message = await RunLoop(ct);
                if (message != null) {
                    throw ProtocolError($"Unexpected host response message:", message);
                }
            } finally {
                // Signal cancellation to any callbacks that haven't returned yet.
                _cts.Cancel();

                await _callbacks.Disconnected();
            }
        }