Struct ReadinessInterestTable 

pub struct ReadinessInterestTable {
    next_watcher_id: usize,
    interests: BTreeMap<FdId, Vec<(usize, Weak<ReadinessWatcher>)>>,
}

The table with all ReadinessWatchers. This tracks, for each file description, which watchers have an interest in events for this file description.

Fields

next_watcher_id: usize

The id of the next ReadinessWatcher created through ReadinessInterestTable::new_watcher.

interests: BTreeMap<FdId, Vec<(usize, Weak<ReadinessWatcher>)>>

Maps each file description (identified by its FdId) to the list of watchers that are interested in that FD. We also store the ReadinessWatchers ID separately so we can access it without calling upgrade. The list is sorted by that id. We use an ID so that we can identify the watcher even after it has been moved, e.g. in ReadinessWatcher::destroy.

Implementations

impl ReadinessInterestTable

pub(crate) fn new() -> Self

pub fn new_watcher(&mut self) -> ReadinessWatcher

Create a new ReadinessWatcher with a globally unique id. Every watcher gets a sequentially increasing id such that no two watchers ever get the same id.

fn insert(&mut self, fd_id: FdId, watcher: &Rc<ReadinessWatcher>)

Add an interest for watcher for the file description with id fd_id.

fn remove(&mut self, fd_id: FdId, watcher: &ReadinessWatcher)

Remove the interest of watcher for the file description with id fd_id.

fn get_watchers_for_fd( &self, fd_id: FdId, ) -> Option<impl Iterator<Item = Rc<ReadinessWatcher>>>

Get all watchers which have a registered interest in the file description with id fd_id.

pub fn remove_watchers_for_fd(&mut self, fd_id: FdId)

Remove all watchers for the file description with id fd_id.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes