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Mail Archives: djgpp/2000/05/04/16:40:00

Message-ID: <3911DCB6.3AC3477E@radar.mcgill.ca>
From: Frederic Cazenave <cazenave AT radar DOT mcgill DOT ca>
Organization: IRD (ex ORSTOM)
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Newsgroups: comp.os.msdos.djgpp
Subject: Signal & setitimer
Lines: 63
Date: Thu, 04 May 2000 20:23:48 GMT
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NNTP-Posting-Date: Thu, 04 May 2000 16:23:48 EDT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hello,

I have written a small progranm to test setitmer.
It's appear this code run correctly on a unix system but
not under DOS.
Under UNIX the timer is reactivate every 10 seconds, but
under dos the timer is active the first time but after is never
reactivate.

Thanks for your help

Fred

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <sys/time.h>

void alarm() {
 printf("Alarm !\n");
 signal (SIGALRM,alarm);
}

void main() {
   static struct itimerval timeout;
   int i;

   timeout.it_interval.tv_sec=0;
   timeout.it_interval.tv_usec = 0;
   timeout.it_value.tv_sec=5;
   timeout.it_value.tv_usec = 0;
   signal (SIGALRM,alarm);

   printf("Signal Test :\n");
   i = 0;
   while (1) {
        sleep(1);
        if ( ++i == 10) {
                setitimer(ITIMER_REAL,&timeout,NULL);
                i=0;
        }
        printf(".");
        fflush(stdout);
   }

}


--
 _________________________________________________________
|                                                          |
|               Frederic CAZENAVE                          |
|    _/\_  /^=  McGill Radar                               |
| \_/    \//    Box 198, MacDonald College                 |
|   | /-\ |     Ste Anne de Bellevue                       |
|   ||   ||     Quebec, Canada   H9X 3V9                   |
|               Tel (514) 398 7733 fax (514) 398 7755      |
|               mailto:Frederic DOT Cazenave AT hmg DOT inpg DOT fr       |
|               http://www.mpl.orstom.fr/hydrologie/catch/ |
|__________________________________________________________|



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