Struct MioDriver 

pub struct MioDriver<S = Box<dyn Handler<Event>>> { /* private fields */ }

World resource wrapping mio::Poll and a handler slab.

S is the handler storage type. Defaults to Box<dyn Handler<mio::event::Event>>.

Users interact with this through Res<MioDriver<S>> (for registry()) or ResMut<MioDriver<S>> (for insert/remove).

Implementations

impl<S> MioDriver<S>

pub fn registry(&self) -> &Registry

Access the mio registry for registering/reregistering sources.

Poll::registry() takes &self, so this works through Res<MioDriver<S>> (shared access).

pub fn insert(&mut self, handler: S) -> Token

Insert a handler and return its token.

The token maps to a mio::Token for use with Registry::register. Requires ResMut<MioDriver<S>>.

pub fn remove(&mut self, token: Token) -> S

Remove a handler by token.

The caller is responsible for deregistering the mio source via registry().deregister(&mut source) if no replacement handler will be inserted. Failing to deregister is safe (stale events are skipped) but wastes kernel resources.

Panics

Panics if the token is not present in the slab.

pub fn contains(&self, token: Token) -> bool

Returns true if the token has a handler in the slab.

pub fn len(&self) -> usize

Number of active handlers.

pub fn is_empty(&self) -> bool

Whether the handler slab is empty.

Trait Implementations

impl<S: Send + 'static> Resource for MioDriver<S>