🚀 go-pugleaf

"Detlef" <detlef.stute@seatec-gmbh.com> wrote in message
news:4030d231$1@newsgroups.borland.com...
> Hi Rob,
> the problem with Sleep( 1) on Microsoft Windows systems is, that the
minimum
> sleep time is a time slice ( and that is 10/15 ms, depending on the
> processor type). On my current tests ( which I think are different from my
> test years before) I recognized that a sleep bet 1 and 15 causes in real
> sleeptimes of 15 - 18 ms, sleeps between 16 and 20 causes in real times of
> around 32 ms.

I'm not sure of the numbers, but have certainly noted that Sleep() often
sleeps longer than intended for small values.   The basic issue is that
windows is not a hard realtime system and Sleep(n) really only
guarantees a sleep time that is at least n milliseconds.

> That is the reason for looking another type of a sleep function.

As others have said in this thread, you probably want to look at
multimedia timers.  http://www.torry.net/timers.htm  lists
various timer components for Delphi that you can either use or,
if they include source, you can use as a guide for your specific
application.

There are other approaches (eg using the actual PC timer), but
those require development of a device driver under windows NT/2000/XP.