Struct calloop::channel::Channel

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pub struct Channel<T> { /* private fields */ }
Expand description

The receiving end of the channel

This is the event source to be inserted into your EventLoop.

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impl<T> Channel<T>

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pub fn recv(&self) -> Result<T, RecvError>

Proxy for mpsc::Receiver::recv to manually poll events.

Note: Normally you would want to use the Channel by inserting it into an event loop instead. Use this for example to immediately dispatch pending events after creation.

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pub fn try_recv(&self) -> Result<T, TryRecvError>

Proxy for mpsc::Receiver::try_recv to manually poll events.

Note: Normally you would want to use the Channel by inserting it into an event loop instead. Use this for example to immediately dispatch pending events after creation.

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impl<T: Debug> Debug for Channel<T>

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

Formats the value using the given formatter. Read more
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impl<T> EventSource for Channel<T>

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type Event = Event<T>

The type of events generated by your source.
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type Metadata = ()

Some metadata of your event source Read more
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type Ret = ()

The return type of the user callback Read more
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type Error = ChannelError

The error type returned from process_events() (not the user callback!).
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fn process_events<C>( &mut self, readiness: Readiness, token: Token, callback: C, ) -> Result<PostAction, Self::Error>
where C: FnMut(Self::Event, &mut Self::Metadata) -> Self::Ret,

Process any relevant events Read more
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fn register( &mut self, poll: &mut Poll, token_factory: &mut TokenFactory, ) -> Result<()>

Register yourself to this poll instance Read more
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fn reregister( &mut self, poll: &mut Poll, token_factory: &mut TokenFactory, ) -> Result<()>

Re-register your file descriptors Read more
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fn unregister(&mut self, poll: &mut Poll) -> Result<()>

Unregister your file descriptors Read more
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const NEEDS_EXTRA_LIFECYCLE_EVENTS: bool = false

Whether this source needs to be sent the EventSource::before_sleep and EventSource::before_handle_events notifications. These are opt-in because they require more expensive checks, and almost all sources will not need these notifications
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fn before_sleep(&mut self) -> Result<Option<(Readiness, Token)>>

Notification that a single poll is about to begin Read more
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fn before_handle_events(&mut self, events: EventIterator<'_>)

Notification that polling is complete, and EventSource::process_events will be called with the given events for this source. The iterator may be empty, which indicates that no events were generated for this source Read more
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impl<T: Send> Send for Channel<T>

Auto Trait Implementations§

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impl<T> Freeze for Channel<T>

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impl<T> !RefUnwindSafe for Channel<T>

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impl<T> !Sync for Channel<T>

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impl<T> Unpin for Channel<T>

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impl<T> !UnwindSafe for Channel<T>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more