delta.tv_sec = t2->tv_sec - t1->tv_sec;
delta.tv_nsec = t2->tv_nsec - t1->tv_nsec;
return ((int64_t) NSEC_PER_SEC * (int64_t) delta.tv_sec) +
delta.tv_sec = t2->tv_sec - t1->tv_sec;
delta.tv_nsec = t2->tv_nsec - t1->tv_nsec;
return ((int64_t) NSEC_PER_SEC * (int64_t) delta.tv_sec) +