Date: Mon, 26 Nov 2001 16:43:12 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Alex Vinokur <alexvn AT bigfoot DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: Getting system time used
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On Mon, 26 Nov 2001, Alex Vinokur wrote:

> The only field of  struct rusage is computed is DJGPP :
>    struct timeval ru_utime;  /* total time used by process */
> 
> How can we get total _system_ time used?

DOS/Windows don't let DJGPP programs get at this kind of info.  In order 
to implement this functionality, one should modify __dpmi_int, which is a 
gateway to all system calls, so that it peeks at the system clock before 
and after the call, and accumulates the results.

Would you like to volunteer to do that?

> For instance, in UNIX
> http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getrusage+3
> struct rusage contains the fields
>    struct timeval ru_utime;/* user time used */
>    struct timeval ru_stime;/* system time used */

On Unix systems, getrusage() talks to the OS kernel and gets the info 
directly from the OS.  So life is muche easier on Unix.  No such luxury 
on DOS/Windows...