Struct futures::channel::mpsc::Sender

pub struct Sender<T> { /* fields omitted */ }

The transmission end of a bounded mpsc channel.

This value is created by the channel function.

Methods

impl<T> Sender<T>

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

Attempts to send a message on this Sender, returning the message if there was an error.

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

Send a message on the channel.

This function should only be called after poll_ready has reported that the channel is ready to receive a message.

pub fn poll_ready(&mut self, lw: &LocalWaker) -> Poll<Result<(), SendError>>

Polls the channel to determine if there is guaranteed capacity to send at least one item without waiting.

Return value

This method returns:

• Ok(Async::Ready(_)) if there is sufficient capacity;
• Ok(Async::Pending) if the channel may not have capacity, in which case the current task is queued to be notified once capacity is available;
• Err(SendError) if the receiver has been dropped.

pub fn is_closed(&self) -> bool

Returns whether this channel is closed without needing a context.

pub fn close_channel(&mut self)

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

Trait Implementations

impl<T> Unpin for Sender<T>

impl<T> Debug for Sender<T> where     T: Debug,

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

Formats the value using the given formatter.

impl<T> Drop for Sender<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T> Clone for Sender<T>

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

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Sink for Sender<T>

type SinkItem = T

The type of value that the sink accepts.

type SinkError = SendError

The type of value produced by the sink when an error occurs.

fn poll_ready(     self: Pin<&mut Sender<T>>,     lw: &LocalWaker ) -> Poll<Result<(), <Sender<T> as Sink>::SinkError>>

Attempts to prepare the Sink to receive a value.

fn start_send(     self: Pin<&mut Sender<T>>,     msg: T ) -> Result<(), <Sender<T> as Sink>::SinkError>

Begin the process of sending a value to the sink. Each call to this function must be proceeded by a successful call to poll_ready which returned Ok(Poll::Ready(())).

fn poll_flush(     self: Pin<&mut Sender<T>>,     &LocalWaker ) -> Poll<Result<(), <Sender<T> as Sink>::SinkError>>

Flush any remaining output from this sink.

fn poll_close(     self: Pin<&mut Sender<T>>,     &LocalWaker ) -> Poll<Result<(), <Sender<T> as Sink>::SinkError>>

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