From: "John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: High speed timing
Date: Fri, 30 Jan 1998 00:05:11 -0500
Organization: Two pounds of chaos and a pinch of salt.
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Lester Davis wrote:
> 
> What is the best way to get a time value between events. I'm getting
> ready to interface a sonar system to a pc and need to measure time of
> flight of the sonar. I don't want to use a simple counter. I'm sure
> there is a function that does what I need, any ideas?

clock() (defined in time.h) returns the elapsed time in CLOCKS_PER_SEC
since the first call to clock() in your program.  uclock() (also defined
in time.h) returns the elapsed time in UCLOCKS_PER_SEC since the first
call to uclock() in your program.  clock() is accurate to approximately
1/91 sec., while uclock() has a resolution of 1/1193180 seconds.  Those
constants are also defined in time.h.

Be aware that uclock() may not be 100% accurate under Windows 95,
because it reprograms the system timer.

For more information, see the libc documentation for clock() and
uclock(), and look at the time.h header file.

-- 
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|      John M. Aldrich       |"A competent and self-confident person|
|       aka Fighteer I       | is incapable of jealousy in anything.|
|   mailto:fighteer AT cs DOT com   | Jealousy is invariably a symptom of  |
| http://www.cs.com/fighteer | neurotic insecurity."  - Lazarus Long|
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