Cygwin with clock_gettime and CLOCK_MONOTONIC - gives always 0
Corinna Vinschen
corinna-cygwin@cygwin.com
Thu Apr 11 19:09:00 GMT 2013
On Apr 11 15:37, Tobias Burnus wrote:
> Please CC your reply to fortran@gcc.gnu.org
Please don't CC me or cgf. We're subscribed to the Cygwin list anyway.
> Dear all,
>
> using clock_gettime with CLOCK_MONOTONIC fails on Cygwin; it always
> gives 0. That breaks code compiled with GCC's gfortran which uses
> system_clock in libgfortran.
Works fine for me with the current Cygwin 1.7.17, and the upcoming
Cygwin 1.7.18:
$ cat > ct.c <<EOF
#include <stdio.h>
#include <time.h>
int
main ()
{
struct timespec tp;
sleep (1);
if (!clock_gettime (CLOCK_MONOTONIC, &tp))
printf ("tv_sec = %ld, tv_nsec = %ld\n", tp.tv_sec, tp.tv_nsec);
sleep (1);
if (!clock_gettime (CLOCK_MONOTONIC, &tp))
printf ("tv_sec = %ld, tv_nsec = %ld\n", tp.tv_sec, tp.tv_nsec);
sleep (1);
if (!clock_gettime (CLOCK_MONOTONIC, &tp))
printf ("tv_sec = %ld, tv_nsec = %ld\n", tp.tv_sec, tp.tv_nsec);
sleep (1);
if (!clock_gettime (CLOCK_MONOTONIC, &tp))
printf ("tv_sec = %ld, tv_nsec = %ld\n", tp.tv_sec, tp.tv_nsec);
}
EOF
$ gcc -o ct ct.c
$ ./ct
tv_sec = 0, tv_nsec = 29920
tv_sec = 1, tv_nsec = 15866090
tv_sec = 2, tv_nsec = 28048880
tv_sec = 3, tv_nsec = 42100530
$
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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