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

int main(void)
{
        struct timeval tv, old_tv;
        long count = 0;

        gettimeofday(&old_tv, NULL);
        while (1) {
                gettimeofday(&tv, NULL);
                if (((tv.tv_sec == old_tv.tv_sec) &&
                     (tv.tv_usec < old_tv.tv_usec)) ||
                    (tv.tv_sec < old_tv.tv_sec)) {
                        printf("backwards\n");
                        printf("old %d.%06d  new %d.%06d\n",
                               old_tv.tv_sec, old_tv.tv_usec,
                               tv.tv_sec, tv.tv_usec);
                        printf("ok count: %ld\n", count);
                } else {
			if ( (tv.tv_sec == old_tv.tv_sec)  &&
			     (tv.tv_usec - old_tv.tv_usec > 9900) ) {
				printf("You only have 10ms clock resolution. No point of testing.\n");
				exit(0);
			}
                        count++;
                }
                old_tv = tv;
        }
        return 0;
}