Struct futures::channel::mpsc::UnboundedSender

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pub struct UnboundedSender<T>(/* private fields */);
Expand description

The transmission end of an unbounded mpsc channel.

This value is created by the unbounded function.

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impl<T> UnboundedSender<T>

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pub fn poll_ready(&self, _: &mut Context<'_>) -> Poll<Result<(), SendError>>

Check if the channel is ready to receive a message.

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pub fn is_closed(&self) -> bool

Returns whether this channel is closed without needing a context.

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pub fn close_channel(&self)

Closes this channel from the sender side, preventing any new messages.

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pub fn disconnect(&mut self)

Disconnects this sender from the channel, closing it if there are no more senders left.

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pub fn start_send(&mut self, msg: T) -> Result<(), SendError>

Send a message on the channel.

This method should only be called after poll_ready has been used to verify that the channel is ready to receive a message.

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pub fn unbounded_send(&self, msg: T) -> Result<(), TrySendError<T>>

Sends a message along this channel.

This is an unbounded sender, so this function differs from Sink::send by ensuring the return type reflects that the channel is always ready to receive messages.

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pub fn same_receiver(&self, other: &UnboundedSender<T>) -> bool

Returns whether the senders send to the same receiver.

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pub fn is_connected_to(&self, receiver: &UnboundedReceiver<T>) -> bool

Returns whether the sender send to this receiver.

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pub fn hash_receiver<H>(&self, hasher: &mut H)
where H: Hasher,

Hashes the receiver into the provided hasher

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pub fn len(&self) -> usize

Return the number of messages in the queue or 0 if channel is disconnected.

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pub fn is_empty(&self) -> bool

Return false is channel has no queued messages, true otherwise.

Trait Implementations§

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impl<T> Clone for UnboundedSender<T>

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fn clone(&self) -> UnboundedSender<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for UnboundedSender<T>

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

Formats the value using the given formatter. Read more
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impl<T> Sink<T> for &UnboundedSender<T>

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type Error = SendError

The type of value produced by the sink when an error occurs.
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fn poll_ready( self: Pin<&mut &UnboundedSender<T>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <&UnboundedSender<T> as Sink<T>>::Error>>

Attempts to prepare the Sink to receive a value. Read more
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fn start_send( self: Pin<&mut &UnboundedSender<T>>, msg: T, ) -> Result<(), <&UnboundedSender<T> as Sink<T>>::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())). Read more
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fn poll_flush( self: Pin<&mut &UnboundedSender<T>>, _: &mut Context<'_>, ) -> Poll<Result<(), <&UnboundedSender<T> as Sink<T>>::Error>>

Flush any remaining output from this sink. Read more
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fn poll_close( self: Pin<&mut &UnboundedSender<T>>, _: &mut Context<'_>, ) -> Poll<Result<(), <&UnboundedSender<T> as Sink<T>>::Error>>

Flush any remaining output and close this sink, if necessary. Read more
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impl<T> Sink<T> for UnboundedSender<T>

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type Error = SendError

The type of value produced by the sink when an error occurs.
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fn poll_ready( self: Pin<&mut UnboundedSender<T>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <UnboundedSender<T> as Sink<T>>::Error>>

Attempts to prepare the Sink to receive a value. Read more
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fn start_send( self: Pin<&mut UnboundedSender<T>>, msg: T, ) -> Result<(), <UnboundedSender<T> as Sink<T>>::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())). Read more
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fn poll_flush( self: Pin<&mut UnboundedSender<T>>, _: &mut Context<'_>, ) -> Poll<Result<(), <UnboundedSender<T> as Sink<T>>::Error>>

Flush any remaining output from this sink. Read more
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fn poll_close( self: Pin<&mut UnboundedSender<T>>, _: &mut Context<'_>, ) -> Poll<Result<(), <UnboundedSender<T> as Sink<T>>::Error>>

Flush any remaining output and close this sink, if necessary. Read more

Auto Trait Implementations§

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impl<T> Freeze for UnboundedSender<T>

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impl<T> !RefUnwindSafe for UnboundedSender<T>

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impl<T> Send for UnboundedSender<T>
where T: Send,

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impl<T> Sync for UnboundedSender<T>
where T: Send,

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impl<T> Unpin for UnboundedSender<T>

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impl<T> !UnwindSafe for UnboundedSender<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> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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, 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, Item> SinkExt<Item> for T
where T: Sink<Item> + ?Sized,

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fn with<U, Fut, F, E>(self, f: F) -> With<Self, Item, U, Fut, F>
where F: FnMut(U) -> Fut, Fut: Future<Output = Result<Item, E>>, E: From<Self::Error>, Self: Sized,

Composes a function in front of the sink. Read more
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fn with_flat_map<U, St, F>(self, f: F) -> WithFlatMap<Self, Item, U, St, F>
where F: FnMut(U) -> St, St: Stream<Item = Result<Item, Self::Error>>, Self: Sized,

Composes a function in front of the sink. Read more
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fn sink_map_err<E, F>(self, f: F) -> SinkMapErr<Self, F>
where F: FnOnce(Self::Error) -> E, Self: Sized,

Transforms the error returned by the sink.
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fn sink_err_into<E>(self) -> SinkErrInto<Self, Item, E>
where Self: Sized, Self::Error: Into<E>,

Map this sink’s error to a different error type using the Into trait. Read more
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fn buffer(self, capacity: usize) -> Buffer<Self, Item>
where Self: Sized,

Adds a fixed-size buffer to the current sink. Read more
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fn close(&mut self) -> Close<'_, Self, Item>
where Self: Unpin,

Close the sink.
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fn fanout<Si>(self, other: Si) -> Fanout<Self, Si>
where Self: Sized, Item: Clone, Si: Sink<Item, Error = Self::Error>,

Fanout items to multiple sinks. Read more
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fn flush(&mut self) -> Flush<'_, Self, Item>
where Self: Unpin,

Flush the sink, processing all pending items. Read more
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fn send(&mut self, item: Item) -> Send<'_, Self, Item>
where Self: Unpin,

A future that completes after the given item has been fully processed into the sink, including flushing. Read more
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fn feed(&mut self, item: Item) -> Feed<'_, Self, Item>
where Self: Unpin,

A future that completes after the given item has been received by the sink. Read more
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fn send_all<'a, St>(&'a mut self, stream: &'a mut St) -> SendAll<'a, Self, St>
where St: TryStream<Ok = Item, Error = Self::Error> + Stream + Unpin + ?Sized, Self: Unpin,

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more
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fn left_sink<Si2>(self) -> Either<Self, Si2>
where Si2: Sink<Item, Error = Self::Error>, Self: Sized,

Wrap this sink in an Either sink, making it the left-hand variant of that Either. Read more
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fn right_sink<Si1>(self) -> Either<Si1, Self>
where Si1: Sink<Item, Error = Self::Error>, Self: Sized,

Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more
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fn poll_ready_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_ready on Unpin sink types.
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fn start_send_unpin(&mut self, item: Item) -> Result<(), Self::Error>
where Self: Unpin,

A convenience method for calling Sink::start_send on Unpin sink types.
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fn poll_flush_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_flush on Unpin sink types.
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fn poll_close_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
where Self: Unpin,

A convenience method for calling Sink::poll_close on Unpin sink types.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.