struct timeval timeval_max(const struct timeval *tv1,
const struct timeval *tv2);
-/**
- return the difference between two timevals as a timeval
- if tv1 comes after tv2, then return a zero timeval
- (this is *tv2 - *tv1)
-*/
-struct timeval timeval_until(const struct timeval *tv1,
- const struct timeval *tv2);
-
/**
convert a timeval to a NTTIME
*/