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From: metzger@watson.ibm.com (Perry E. Metzger)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: talk session
Message-ID: <1991May8.194940.13610@watson.ibm.com>
Date: 8 May 91 19:49:40 GMT
References: <1991May7.000521.28186@athena.cs.uga.edu> <1991May7.084631.10183@prl.dec.com> <1991May7.102219.25557@ssd.kodak.com>
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In article <1991May7.102219.25557@ssd.kodak.com> weimer@ssd.kodak.com writes:
>In article <1991May7.084631.10183@prl.dec.com>, boyd@prl.dec.com (Boyd
>Roberts) writes:
>|> In article <1991May7.000521.28186@athena.cs.uga.edu>,
>greg@athena.cs.uga.edu (Greg Whitlock) writes:
>|> > 		for (i = 0; i < delay; i++)
>|> > 			;
>|> You cannot be serious.  I think your `friend' should man sleep(3).
>
>Mmmm, my man page doesn't tell me how to sleep for less than 1 second...

Check out usleep, or, if you don't have it and are on a BSD system,
write your own using select with a timeout and no file descriptors. Or
use the getitimer/setitimer facility if somehow you don't have the
rest but you have them. All these let you nap for less than a second.

Really, there is ABSOLUTELY NO EXCUSE for busy waiting on a
timesharing system. Its obnoxious because it wastes the cycles other
people could be getting work done during.

Perry