Struct Sleepers 

pub(crate) struct Sleepers {
    pub(crate) count: usize,
    pub(crate) wakers: Vec<(usize, Waker)>,
    pub(crate) free_ids: Vec<usize>,
}

A list of sleeping tickers.

Fields

count: usize

Number of sleeping tickers (both notified and unnotified).

wakers: Vec<(usize, Waker)>

IDs and wakers of sleeping unnotified tickers.

A sleeping ticker is notified when its waker is missing from this list.

free_ids: Vec<usize>

Reclaimed IDs.

Implementations

impl Sleepers

pub(crate) fn insert(&mut self, waker: &Waker) -> usize

Inserts a new sleeping ticker.

pub(crate) fn update(&mut self, id: usize, waker: &Waker) -> bool

Re-inserts a sleeping ticker’s waker if it was notified.

Returns true if the ticker was notified.

pub(crate) fn remove(&mut self, id: usize) -> bool

Removes a previously inserted sleeping ticker.

Returns true if the ticker was notified.

pub(crate) fn is_notified(&self) -> bool

Returns true if a sleeping ticker is notified or no tickers are sleeping.

pub(crate) fn notify(&mut self) -> Option<Waker>

Returns notification waker for a sleeping ticker.

If a ticker was notified already or there are no tickers, None will be returned.