Trait governor::clock::Reference[−][src]

pub trait Reference: Sized + Add<Nanos, Output = Self> + PartialEq + Eq + Ord + Copy + Clone + Send + Sync + Debug {
    fn duration_since(&self, earlier: Self) -> Nanos;

    fn saturating_sub(&self, duration: Nanos) -> Self;
}
Expand description

A measurement from a clock.

Required methods

Determines the time that separates two measurements of a clock. Implementations of this must perform a saturating subtraction - if the earlier timestamp should be later, duration_since must return the zero duration.

Returns a reference point that lies at most duration in the past from the current reference. If an underflow should occur, returns the current reference.

Implementations on Foreign Types

The internal duration between this point and another.

let diff = Duration::from_secs(20).duration_since(Duration::from_secs(10));
assert_eq!(diff, Duration::from_secs(10).into());

The internal duration between this point and another.

let diff = Reference::saturating_sub(&Duration::from_secs(20), Duration::from_secs(10).into());
assert_eq!(diff, Duration::from_secs(10));

Returns the difference in times between the two SystemTimes. Due to the fallible nature of SystemTimes, returns the zero duration if a negative duration would result (e.g. due to system clock adjustments).

Implementors