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From: jr@bbn.com (John Robinson)
Newsgroups: comp.emacs
Subject: Re: sleep-for milli-seconds
Message-ID: <54666@bbn.COM>
Date: 9 Apr 90 20:29:08 GMT
References: <9004091446.AA02335@life.ai.mit.edu>
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Reply-To: jr@bbn.com (John Robinson)
Organization: BBN Systems and Technologies Corporation, Cambridge MA
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In-reply-to: CLAASSEN@HNYKUN53.BITNET

In article <9004091446.AA02335@life.ai.mit.edu>, CLAASSEN@HNYKUN53 writes:
>Does anybody know of a way to make GNU sleep for milli-seconds instead
>of seconds. (Our OS is ULTRIX)

There is one for the Sun, in sunfns.c:

/*
 *   Sun sleep-for (allows a shorter interval than the regular sleep-for)
 */
DEFUN ("sleep-for-millisecs", 
	Fsleep_for_millisecs,
	Ssleep_for_millisecs, 1, 1, 0,
   "Pause, without updating display, for ARG milliseconds.")
	(n)
	Lisp_Object n;
{
  unsigned useconds;

  CHECK_NUMBER (n, 0);
  useconds = XINT(n) * 1000;
  usleep(useconds);
  return(Qt);
}

This depends on the system call usleep(), which sleeps for a specified
number of microseconds.  Given the appropriate system call, you could
put this functionality into emacs under Ultrix (addf it to the source).
--
/jr, nee John Robinson     Life did not take over the globe by combat,
jr@bbn.com or bbn!jr          but by networking -- Lynn Margulis