Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uunet!samsung!think!mintaka!yale!cs.yale.edu
From: Duchier-Denys@cs.yale.edu (Denys Duchier)
Newsgroups: comp.lang.lisp
Subject: Re: Lisp - C problem
Keywords: sleep
Message-ID: <10530@cs.yale.edu>
Date: 7 Jan 90 19:43:39 GMT
References: <1026@prlhp1.prl.philips.co.uk>
Sender: news@cs.yale.edu
Reply-To: Duchier-Denys@cs.yale.edu (Denys Duchier)
Organization: Computer Science, Yale University, New Haven, CT 06520-2158
Lines: 21
In-reply-to: walker@prlhp1.prl.philips.co.uk (David Walker)

In article <1026@prlhp1.prl.philips.co.uk>, walker@prlhp1 (David Walker) writes:
> 
>   I'm running Sun Common Lisp 3.0.1 on mu Sparcstation and linking in code
> written in C. One of my c functions calls the sleep subroutine, but the call
> to sleep results in no process suspention. i.e. A sleep(5); call returns
> immediately. Has anybody experienced the same problem and found a solution?
> 
>   Thanks for any help,
>                       david walker
> 
> davidw@prl.philips.co.uk

Lucid 3.0 has a multitasking facility. My guess is that they need a
timer to schedule processes. Perhaps your call is interfering with
that other function (see manual page for sleep). Try setting the timer
directly (but make sure to reset it to what it was before), or maybe
do: sleep(0); sleep(5);
This is just guesswork and may have nothing to do with what is
actually going on.

--Denys