Struct Signal 

pub struct Signal { /* private fields */ }

Cloneable handle onto a scope’s cancellation level. See the module docs for the level/merge model.

The level list is a shared slice, not an owned Vec: clone (the hot per-request/per-record operation) is one atomic increment and zero allocation; only new/child (scope creation) allocate.

Implementations

impl Signal

pub fn new() -> Self

pub fn child(&self) -> Self

A nested scope: observes every ancestor level plus a fresh one of its own. Firing the child never touches the ancestors.

pub fn fire(&self)

Fire this handle’s own scope level (idempotent). Ancestor levels are never fired through a child handle.

pub fn is_fired(&self) -> bool

True once this scope or any ancestor scope has fired.

pub fn fired(&self) -> Fired

Resolves when this scope or any ancestor fires; resolves immediately if that already happened (sticky level).

pub fn guard(self) -> SignalGuard

Fire-on-drop guard for tying a scope’s lifetime to a value (e.g. cancel a request’s subtree when its driver unwinds).

Trait Implementations

impl Clone for Signal

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Signal

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

Formats the value using the given formatter.

impl Default for Signal

fn default() -> Self

Returns the “default value” for a type.