Struct Liveness 

pub struct Liveness { /* private fields */ }

Per-child liveness tracker. Construct at spawn with the child’s absolute deadline; feed it events as they arrive; classify(now) each tick.

Implementations

impl Liveness

pub fn new(now: Instant, deadline: Instant, cfg: LivenessConfig) -> Liveness

pub fn on_event(&mut self, now: Instant)

A substantive progress frame arrived (Event/Usage/Result). Also counts as liveness, so it refreshes the pong clock too.

pub fn on_pong(&mut self, now: Instant)

A Pong arrived (liveness only — not progress).

pub fn on_eof(&mut self)

The control channel closed.

pub fn deadline(&self) -> Instant

pub fn classify(&self, now: Instant) -> Health

The 2x2 classifier. Order matters: EOF and the hard deadline dominate — a child that has already closed its channel or blown its deadline must not be reported Healthy just because an event landed a moment earlier. Otherwise recent events = Healthy, else recent pongs = Busy, else Stuck.

Trait Implementations

impl Debug for Liveness

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

Formats the value using the given formatter.