Struct async_ui_internal_utils::wakers_arena::WakersArena

pub struct WakersArena { /* private fields */ }

An arena to contain many doubly-linked lists of wakers.

Implementations

impl WakersArena

pub fn new() -> Self

Create a new arena with no list in it yet.

pub fn add_sublist(&mut self) -> WakersSublist

Create an empty doubly-linked list of wakers in the arena.

The returned WakersSublist can be used to access this list later.

pub fn add(&mut self, WakersSublist: &WakersSublist) -> WakerSlot

Allocate space in a list for a waker.

The allocated slot will have a dummy no-op waker put in. Use update to set your actual waker.

pub fn remove(&mut self, handle: &WakerSlot)

Remove a previously added waker.

pub fn remove_sublist_if_empty(&mut self, WakersSublist: &WakersSublist) -> bool

If the sublist is empty (contains only the head node), remove it and return true.

pub fn update(&mut self, WakerSlot: &WakerSlot, waker: &Waker)

Set the waker in the slot.

This method checks Waker::will_wake first.

pub fn iter<'s>( &'s self, WakersSublist: &WakersSublist ) -> impl Iterator<Item = &'s Waker> + 's

Iterate over all the wakers in the given sublist.

Useful for waking the wakers.

Trait Implementations

impl Default for WakersArena

fn default() -> Self

Returns the “default value” for a type.