timeout=(delay)[permalink][rdoc]-
[TODO]
Sets block and non-blocking reads for the window. - If delay is negative, blocking read is used (i.e., waits indefinitely for input). - If delay is zero, then non-blocking read is used (i.e., read returns ERR if no input is waiting). - If delay is positive, then read blocks for delay milliseconds, and returns ERR if there is still no input.