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
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Date: Thu, 04 May 2000 20:23:48 GMT
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To: djgpp AT delorie DOT com
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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);
   }

}


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|               Frederic CAZENAVE                          |
|    _/\_  /^=  McGill Radar                               |
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