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From: morrell@hpcuhb.HP.COM (Michael Morrell)
Newsgroups: comp.unix.internals
Subject: Re: Can Unix sleep in terms of mili/micro?
Message-ID: <37960001@hpcuhb.HP.COM>
Date: 12 Sep 90 21:56:23 GMT
References: <24437@adm.BRL.MIL>
Organization: Hewlett Packard, Cupertino
Lines: 22

/comp.unix.internals/james@dlss2.UUCP (James Cummings)/5:11 am  Sep 11, 1990/
>>        Can Unix sleep in terms of mili or mirco second?

> sleep_less_than_sec(x)
> int x;
> {
>	int i;
> 
> 	for (i = 0;i <= x;i++)
> 		;
> }

>	I'd think that would give you approx. 25 clock cycles, dependent on
>the machine, the load on the machine, etc.
----------

This is not a very good idea.  Any decent optimizer will simply optimize away
your code loop and you won't get any delay (although if you declare "i" as
volatile, it shouldn't be removed, but it's still very dependent on the
machine and its current load).

  Michael