Xref: utzoo comp.lang.c:24630 comp.unix.questions:18545
Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!sunic!maxim!prc
From: prc@erbe.se (Robert Claeson)
Newsgroups: comp.lang.c,comp.unix.questions
Subject: Re: sleep()ing less than a second
Message-ID: <1043@maxim.erbe.se>
Date: 20 Dec 89 17:55:22 GMT
References: <89348.231211BACON@MTUS5.BITNET> <2754@servax0.essex.ac.uk>
Followup-To: comp.unix.questions
Organization: ERBE DATA AB, Jarfalla, Sweden
Lines: 16

In article <2754@servax0.essex.ac.uk>, peter@sersun1.essex.ac.uk (Allott P) writes:
> In article <89348.231211BACON@MTUS5.BITNET> BACON@MTUS5.BITNET (Jeffery Bacon) writes:

> >Given sleep(arg); unsigned arg. Nothing new.
> >But what if you want to sleep for less than one second, say, 0.5?

> It is possible to "sleep" for less than one second by doing a
> selcect(.......) with an appropriate value in the timeval (5th param I think)
> and with no channels to check (2nd through 4th params I think).

The same trick can be done under UNIX System V Release 3.x using the poll()
system call with appropriate values and no stream fd's to check.

-- 
          Robert Claeson      E-mail: rclaeson@erbe.se
	  ERBE DATA AB