+#if TARGET_HOST_UNIX_X11
+ /*
+ * Possibly due to aggressive use of XFlush() and friends,
+ * it is possible to have our socket drained but still have
+ * unprocessed events. (Or, this may just be normal with
+ * X, anyway?) We do non-trivial processing of X events
+ * after tham in event-reading loop, in any case, so we
+ * need to allow that we may have an empty socket but non-
+ * empty event queue.
+ */
+ if( ! XPending( fgDisplay.Display ) )
+ {
+ fd_set fdset;
+ int err;
+ int socket;
+ struct timeval wait;
+
+ socket = ConnectionNumber( fgDisplay.Display );
+ FD_ZERO( &fdset );
+ FD_SET( socket, &fdset );
+ wait.tv_sec = msec / 1000;
+ wait.tv_usec = (msec % 1000) * 1000;
+ err = select( socket+1, &fdset, NULL, NULL, &wait );
+
+ if( -1 == err )
+ fgWarning ( "freeglut select() error: %d\n", errno );
+ }