package congestion import ( "math" "time" "golang.org/x/exp/constraints" ) // InfDuration is a duration of infinite length const InfDuration = time.Duration(math.MaxInt64) func Max[T constraints.Ordered](a, b T) T { if a < b { return b } return a } func Min[T constraints.Ordered](a, b T) T { if a < b { return a } return b } // MinNonZeroDuration return the minimum duration that's not zero. func MinNonZeroDuration(a, b time.Duration) time.Duration { if a == 0 { return b } if b == 0 { return a } return Min(a, b) } // AbsDuration returns the absolute value of a time duration func AbsDuration(d time.Duration) time.Duration { if d >= 0 { return d } return -d } // MinTime returns the earlier time func MinTime(a, b time.Time) time.Time { if a.After(b) { return b } return a } // MinNonZeroTime returns the earlist time that is not time.Time{} // If both a and b are time.Time{}, it returns time.Time{} func MinNonZeroTime(a, b time.Time) time.Time { if a.IsZero() { return b } if b.IsZero() { return a } return MinTime(a, b) } // MaxTime returns the later time func MaxTime(a, b time.Time) time.Time { if a.After(b) { return a } return b }