Enum RateControlState 

pub enum RateControlState {
    Hold,
    Increase,
    Decrease,
}

What the rate controller should be doing.

Variants

Hold

Hold the current rate — used immediately after a decrease, so the effect of the backoff can be observed before changing anything again.

Increase

Climb, looking for more capacity.

Decrease

Back off.

Implementations

impl RateControlState

pub fn next(self, usage: Usage) -> Self

The next state, given what the delay signal now says.

Pure: no clock, no rate, no history beyond the current state. That is what makes it exhaustively testable — the whole machine is nine transitions.

The asymmetry is deliberate and is the heart of AIMD: overuse always goes straight to Decrease, from any state, because congestion is urgent; but recovery goes through Hold first, so the rate does not resume climbing before the backoff has taken effect.

Trait Implementations

impl Clone for RateControlState

fn clone(&self) -> RateControlState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for RateControlState

impl Debug for RateControlState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RateControlState

fn default() -> RateControlState

Returns the “default value” for a type.

impl Eq for RateControlState

impl PartialEq for RateControlState

fn eq(&self, other: &RateControlState) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RateControlState