Struct Watchdog 

pub struct Watchdog { /* private fields */ }

The per-execute timeout timer with a movable deadline.

Created by the kernel when a script timeout is in effect, shared with every ExecContext snapshot of that execution (and its forks) so builtins can acquire patient holds against it.

Implementations

impl Watchdog

pub fn new(budget: Duration) -> Self

Start the clock: the script deadline is budget from now.

pub async fn run( self: Arc<Self>, elapsed: Arc<AtomicBool>, token: CancellationToken, )

Timer task body: sleep toward the current deadline, re-arming whenever a patient hold moves it. When the deadline is genuinely reached, set elapsed (so the kernel maps the result to exit 124) and fire token.

pub fn hold(self: &Arc<Self>, budget: Duration) -> WatchdogHold

Suspend the active regime: freeze its remaining time and let budget govern the deadline until the hold drops.