Struct pagecache::OneShot

pub struct OneShot<T> { /* fields omitted */ }

A Future value which may or may not be filled

Methods

impl<T> OneShot<T>

pub fn pair() -> (OneShotFiller<T>, Self)

Create a new OneShotFiller and the OneShot that will be filled by its completion.

pub fn wait(self) -> Option<T>

Block on the OneShot's completion or dropping of the OneShotFiller

pub fn unwrap(self) -> T

Block on the OneShot's completion or dropping of the OneShotFiller.

Panics

panics if the OneShotFiller is dropped without completing the promise.

Trait Implementations

impl<T: Debug> Debug for OneShot<T>

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

Formats the value using the given formatter.

impl<T> Future for OneShot<Result<T>>

type Output = Result<T>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.