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Re: B20.1: Setitimer provides virtual timer?
- To: chikayama@klic.org
- Subject: Re: B20.1: Setitimer provides virtual timer?
- From: Chris Faylor <cgf@cygnus.com>
- Date: Thu, 12 Aug 1999 17:28:37 -0400
- Cc: cygwin@sourceware.cygnus.com
- References: <19990812112810X.chik@klic.org>
- Reply-To: cygwin@sourceware.cygnus.com
It's not implemented in Cygwin currently. Actually, I don't know
of any way to implement it, period.
-chris
On Thu, Aug 12, 1999 at 11:28:10AM +0900, chikayama@klic.org wrote:
>"setitimer(ITIMER_VIRTUAL, ...)" does not seem to deliver SIGVTALRM
>signals. The test program included below, that sets the process timer
>and loops awaiting for timer expiration, will loop forever. However,
>running this in background and sending the signal by "kill -VTALRM ..."
>from the shell will terminate it as expected (with an exclamation mark
>output).
>
>Is this the spec. of the current release or a bug?
>
># I really enjoy using Cygwin. Thank you for your efforts!
>
>-- Takashi Chikayama@Dept. of Frontier Informatics., the Univ. of Tokyo
>-- Tel. +81-3-5841-6658; Fax. +81-3-5841-8572
>-- E-mail chikayama@klic.org; Home page http://www.logos.t.u-tokyo.ac.jp
>
>#include <sys/time.h>
>#include <unistd.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <signal.h>
>
>volatile int time_has_come;
>
>void handler(int signal)
>{
> time_has_come = 1;
> fprintf(stderr, "!\n");
> return;
>}
>
>struct itimerval interval;
>
>int main(int argc, char * const argv[])
>{
> interval.it_interval.tv_sec = 0;
> interval.it_interval.tv_usec = 0;
> interval.it_value.tv_sec = 1;
> interval.it_value.tv_usec = 0;
> signal(SIGVTALRM, handler);
> (void) setitimer(ITIMER_VIRTUAL, &interval, NULL);
> time_has_come = 0;
> while (1) {
> if (time_has_come) {
> exit(0);
> }
> }
>}
>
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