Struct Context 

pub struct Context(/* private fields */);

A context value carrying a cancellation signal and optional deadline.

Cheap to clone — backed by Arc.

Implementations

impl Context

pub fn done(&self) -> &Receiver<()>

A receiver that fires (returns None) when this context is cancelled or its deadline elapses. Use it in select!:

go_lib::select! {
    recv(ctx.done()) -> _v => { /* cancelled */ }
    default              => { /* still running */ }
}

pub fn deadline(&self) -> Option<Instant>

The deadline of this context, or None for contexts without one.

pub fn err(&self) -> Option<ContextError>

The cancellation error, or None if the context is still active.

pub fn is_done(&self) -> bool

true if this context has been cancelled or its deadline has elapsed.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.