Struct Clock 

pub struct Clock { /* private fields */ }

What: The clock of one bounded child: it says when the child has stalled or passed its fixed deadline. Why: The waiting loop asks it every few milliseconds; it reads the counters only every SAMPLE_INTERVAL.

In TS you’d write (pseudocode):

class Clock { check(): StopCause | undefined }

Implementations

impl Clock

pub fn start(pid: u32, patience: Patience) -> Self

Start the clock of a child that has just been started.

pub fn without_wall_fallback(self) -> Self

The same clock for a run that must never end by wall time: where nothing is counted it is never judged stalled.

pub fn with_connected_window(self, window: Duration) -> Self

The same clock with another window for a tree whose connection is open and silent.

pub fn measures(&self) -> bool

Whether this clock reads the tree’s signs of work at all (Linux with /proc/<pid>/io), so a stall means quiet time.

pub fn longest_quiet(&self) -> Duration

The longest stretch with no sign of work so far, the one still running included. A step that ended by itself gives the figure of a healthy step, which is what an interval must be set above.

pub fn wait_report(&self) -> Option<WaitReport>

The wait the clock has let pass instead of a stop, once the stall window ran out with the connection open.

pub fn take_wait_note(&mut self) -> Option<WaitReport>

The wait, the first time it is asked for after the wait began, so the caller says it once.

pub fn check(&mut self) -> Option<StopCause>

Whether the child must be stopped now, and why.