[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Waiting for I/O, and suggestions
The description of the various READ routines says, "If no input is
available, then the end-of-file token is returned." Depending on how
you interpret "available," that's not true for (TERMINAL-INPUT); i.e.,
the T process will wait for input.
I don't know whether that feature is worth generalizing; i.e., should
you be able to define your own input stream that has that
characteristic? It might be handy for "mailboxes" and pipes, for
Another addition, probably more useful but equally system-dependent,
is something along the lines of (INPUT-AVAILABLE? stream) that does
a conditional read. It's hackable now, but should it become part of
the standard language?