Struct OverlayAck 

pub struct OverlayAck {
    armed: AtomicU64,
    acked: AtomicU64,
}

Two monotonic counters tracking whether the overlay reported in for the most recently fired break. armed advances on every fired break; acked is raised to the latest armed value when the overlay renders. A captured epoch is “stranded” when it is still the armed break and acked never caught up to it.

Fields

armed: AtomicU64

acked: AtomicU64

Implementations

impl OverlayAck

pub const fn new() -> Self

pub fn arm(&self) -> u64

Arm a freshly-fired break and return its epoch for a watchdog task to capture. The first armed break is epoch 1 (0 is “never fired”).

pub fn ack(&self)

Record that the overlay rendered the current break — raise acked to the latest armed epoch. Also used as a defensive disarm on a normal end_break, so a late watchdog can never tear down an already-ended break. fetch_max keeps it monotonic under any interleaving.

pub fn is_stranded(&self, epoch: u64) -> bool

Whether epoch is still the armed break and no ack has caught up to it — the overlay never rendered. A newer break (armed > epoch) makes the captured epoch inert: that break has its own watchdog.

Trait Implementations

impl Debug for OverlayAck

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

Formats the value using the given formatter.

impl Default for OverlayAck

fn default() -> Self

Returns the “default value” for a type.