Struct FaultLatch 

pub struct FaultLatch { /* private fields */ }

A one-shot, first-writer-wins fault flag.

Constructible in a test so the global is never a shared fixture — a latch is by design irreversible, which would make one global instance a cross-test dependency.

Implementations

impl FaultLatch

pub const fn new() -> Self

pub fn latch(&self, reason: impl Into<String>) -> bool

Record a fatal fault. Returns true iff this call was the first — the caller uses that to log and to trigger shutdown exactly once.

pub fn fault(&self) -> Option<&str>

The reason for the fault, or None if healthy.

pub fn is_faulted(&self) -> bool

Cheap health check — one acquire load.

Trait Implementations

impl Debug for FaultLatch

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

Formats the value using the given formatter.

impl Default for FaultLatch

fn default() -> FaultLatch

Returns the “default value” for a type.