Struct flume::Receiver

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

The receiving end of a channel.

Note: Cloning the receiver does not turn this channel into a broadcast channel. Each message will only be received by a single receiver. This is useful for implementing work stealing for concurrent programs.

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impl<T> Receiver<T>

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pub fn recv_async(&self) -> RecvFut<'_, T>

Asynchronously receive a value from the channel, returning an error if all senders have been dropped. If the channel is empty, the returned future will yield to the async runtime.

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pub fn into_recv_async<'a>(self) -> RecvFut<'a, T>

Convert this receiver into a future that asynchronously receives a single message from the channel, returning an error if all senders have been dropped. If the channel is empty, this future will yield to the async runtime.

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pub fn stream(&self) -> RecvStream<'_, T>

Create an asynchronous stream that uses this receiver to asynchronously receive messages from the channel. The receiver will continue to be usable after the stream has been dropped.

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pub fn into_stream<'a>(self) -> RecvStream<'a, T>

Convert this receiver into a stream that allows asynchronously receiving messages from the channel.

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impl<T> Receiver<T>

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

Attempt to fetch an incoming value from the channel associated with this receiver, returning an error if the channel is empty or if all senders have been dropped.

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

Wait for an incoming value from the channel associated with this receiver, returning an error if all senders have been dropped.

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pub fn recv_deadline(&self, deadline: Instant) -> Result<T, RecvTimeoutError>

Wait for an incoming value from the channel associated with this receiver, returning an error if all senders have been dropped or the deadline has passed.

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pub fn recv_timeout(&self, dur: Duration) -> Result<T, RecvTimeoutError>

Wait for an incoming value from the channel associated with this receiver, returning an error if all senders have been dropped or the timeout has expired.

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pub fn iter(&self) -> Iter<'_, T>

Create a blocking iterator over the values received on the channel that finishes iteration when all senders have been dropped.

You can also create a self-owned iterator with Receiver::into_iter.

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pub fn try_iter(&self) -> TryIter<'_, T>

A non-blocking iterator over the values received on the channel that finishes iteration when all senders have been dropped or the channel is empty.

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pub fn drain(&self) -> Drain<'_, T>

Take all msgs currently sitting in the channel and produce an iterator over them. Unlike try_iter, the iterator will not attempt to fetch any more values from the channel once the function has been called.

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pub fn is_disconnected(&self) -> bool

Returns true if all senders for this channel have been dropped.

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pub fn is_empty(&self) -> bool

Returns true if the channel is empty. Note: Zero-capacity channels are always empty.

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pub fn is_full(&self) -> bool

Returns true if the channel is full. Note: Zero-capacity channels are always full.

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pub fn len(&self) -> usize

Returns the number of messages in the channel.

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pub fn capacity(&self) -> Option<usize>

If the channel is bounded, returns its capacity.

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pub fn sender_count(&self) -> usize

Get the number of senders that currently exist.

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pub fn receiver_count(&self) -> usize

Get the number of receivers that currently exist, including this one.

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pub fn same_channel(&self, other: &Receiver<T>) -> bool

Returns whether the receivers are belong to the same channel.

Trait Implementations§

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impl<T> Clone for Receiver<T>

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fn clone(&self) -> Self

Clone this receiver. Receiver acts as a handle to the ending a channel. Remaining channel contents will only be cleaned up when all senders and the receiver have been dropped.

Note: Cloning the receiver does not turn this channel into a broadcast channel. Each message will only be received by a single receiver. This is useful for implementing work stealing for concurrent programs.

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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 Receiver<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> Drop for Receiver<T>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<'a, T> IntoIterator for &'a Receiver<T>

This exists as a shorthand for Receiver::iter.

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type Item = T

The type of the elements being iterated over.
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type IntoIter = Iter<'a, T>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl<T> IntoIterator for Receiver<T>

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fn into_iter(self) -> Self::IntoIter

Creates a self-owned but semantically equivalent alternative to Receiver::iter.

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type Item = T

The type of the elements being iterated over.
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type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Receiver<T>

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

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

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impl<T> Unpin for Receiver<T>

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impl<T> UnwindSafe for Receiver<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, 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> 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.