fields-doug@cs.yale.edu (Doug Fields) (03/27/91)
I am using the functions nap() and rdchk() in one of my programs.
I was wondering if anyone had any code to emulate these in a portable,
non-cpu intensive way. In case you don't know what these do:
rdchk(f) - checks to see if a subsequent read would not block... I
use it as rdchk(0) to see if the user has pressed a key
yet. Returns 1 if there is input waiting.
nap(t) - sleeps for t milliseconds. I use this to put a 1/5th of a
second pause (nap(200)).
If there is no way to get nap() to work the program works just fine with
sleep(1) but it is a lot more slugish. As for rdchk, Apparently you can
use ioctl to set the VTIME and the other parameter to 0 and get a very
cpu-intensive form of rdchk.
Any help is appreiciated. Thanks.
Doug
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