1 /* Return frequency of ticks reported by profil. Generic version. */
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34 #include <sys/types.h>
37 #include <libc-internal.h>
43 __profile_frequency (void)
46 * Discover the tick frequency of the machine if something goes wrong,
47 * we return 0, an impossible hertz.
51 tim
.it_interval
.tv_sec
= 0;
52 tim
.it_interval
.tv_usec
= 1;
53 tim
.it_value
.tv_sec
= 0;
54 tim
.it_value
.tv_usec
= 0;
55 setitimer(ITIMER_REAL
, &tim
, 0);
56 setitimer(ITIMER_REAL
, 0, &tim
);
57 if (tim
.it_interval
.tv_usec
< 2)
59 return (1000000 / tim
.it_interval
.tv_usec
);