TIME_TO_TICKS
_Static_assert(TIME_TO_TICKS(INT_MAX / (hz) - 1, 999999, hz) >= 0 && \
TIME_TO_TICKS(INT_MAX / (hz) - 1, 999999, hz) < INT_MAX, \
retval = TIME_TO_TICKS((int)tv->tv_sec, (int)tv->tv_usec, hz);