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From: dwp@mtune.ATT.COM (David Preisler)
Newsgroups: comp.unix
Subject: Asynchronous stuff
Message-ID: <985@altos86.UUCP>
Date: 31 Mar 89 03:18:33 GMT
Sender: dtynan@altos86.UUCP
Organization: AT&T ISL Middletown NJ USA
Lines: 21
Approved: dtynan@zorba.Tynan.COM


Trying to read user input async [like a text editor] via Unix(tm) 
SystemV 'NO DELAY' but it's a real cpu hog!  Emacs reads keys async-  
but it's very good with the cpu- How Does it do it? Currently I'm 
polling for input.

Also am trying to update the time once a second [just so I know that
the program is still alive- the info displayed rarely changes ]- Is
their an efficient way to do this?  Currently, again,  I'm just polling 
'till one sec has elapsed: I can't sleep(1) because I'm also waiting for 
async input.

Please respond via Email, don't often get to read NetNews. 


Thanks,
David William Preisler                                

AT&T Bell Laboratories     Email: att!mtune!dwp.ATT.COM
     200 Laurel Avenue
Middletown,  NJ  07748     Phone: (201) 957-2594