Struct HaltSignal 

pub struct HaltSignal { /* private fields */ }

A thread-safe halt signal the kernel registers with the writer.

Each fail-stop source fires the shared callback at most once: the submitting thread on a backpressure stall, the writer thread on a backend failure, and the capture adapter on a rejected submit. The signal records the first reason for supervision; no runtime component polls it to stop the trader.

Implementations

impl HaltSignal

pub fn new() -> Self

Constructs a fresh, un-fired halt signal.

pub fn callback(&self) -> HaltCallback

Returns the HaltCallback the writer fires when an unrecoverable condition occurs.

The callback records the HaltReason (preserving only the first one when the writer and the capture adapter both signal) and then flips the halted flag, so a poller that observes is_halted() never reads back an empty reason.

pub fn is_halted(&self) -> bool

Returns whether the writer has signaled fail-stop.

pub fn reason(&self) -> Option<HaltReason>

Returns the HaltReason recorded on the first fail-stop, if any.

Calling this does not clear the signal; the kernel’s halted flag remains set so subsequent submits surface as fail-stopped.

Trait Implementations

impl Clone for HaltSignal

fn clone(&self) -> HaltSignal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HaltSignal

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

Formats the value using the given formatter.

impl Default for HaltSignal

fn default() -> Self

Returns the “default value” for a type.