Struct PreemptiveGuard 

pub struct PreemptiveGuard { /* private fields */ }

RAII guard holding one unit of a PreemptiveResource.

Dropping the guard releases the unit (waking the next waiter) unless the unit was already preempted, in which case the drop is a no-op — the unit has already been handed to the preemptor.

Implementations

impl PreemptiveGuard

pub fn preempted(&self) -> EventAwaitable

A future that resolves when this unit is preempted by a higher-priority request. Intended for racing against the holder’s work, e.g. any_of![env.timeout(d), guard.preempted()].

Resolves immediately if preemption has already happened.

pub fn is_preempted(&self) -> bool

Synchronously report whether this unit has been preempted. Check this after a race to decide whether to abandon the work.

Trait Implementations

impl Debug for PreemptiveGuard

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

Formats the value using the given formatter.

impl Drop for PreemptiveGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.