Docs4dev
Docs
rust / latest / std / sync / mpsc / struct.sender.html

Struct std::sync::mpsc::Sender

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

The sending-half of Rust’s asynchronous channel type.

Messages can be sent through this channel with send.

Note: all senders (the original and its clones) need to be dropped for the receiver to stop blocking to receive messages with Receiver::recv.

Examples

use std::sync::mpsc::channel;
use std::thread;

let (sender, receiver) = channel();
let sender2 = sender.clone();

// First thread owns sender
thread::spawn(move || {
    sender.send(1).unwrap();
});

// Second thread owns sender2
thread::spawn(move || {
    sender2.send(2).unwrap();
});

let msg = receiver.recv().unwrap();
let msg2 = receiver.recv().unwrap();

assert_eq!(3, msg + msg2);

Implementations

source 
impl<T> Sender<T>
source 
pub fn send(&self, t: T) -> Result<(), SendError<T>>

Attempts to send a value on this channel, returning it back if it could not be sent.

A successful send occurs when it is determined that the other end of the channel has not hung up already. An unsuccessful send would be one where the corresponding receiver has already been deallocated. Note that a return value of Err means that the data will never be received, but a return value of Ok does not mean that the data will be received. It is possible for the corresponding receiver to hang up immediately after this function returns Ok.

This method will never block the current thread.

Examples
use std::sync::mpsc::channel;

let (tx, rx) = channel();

// This send is always successful
tx.send(1).unwrap();

// This send will fail because the receiver is gone
drop(rx);
assert_eq!(tx.send(1).unwrap_err().0, 1);

Trait Implementations

source 
impl<T> Clone for Sender<T>
source 
fn clone(&self) -> Sender<T>

Clone a sender to send to other threads.

Note, be aware of the lifetime of the sender because all senders (including the original) need to be dropped in order for Receiver::recv to stop blocking.

source 
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source. Read more
1.8.0source 
impl<T> Debug for Sender<T>
source 
fn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
source 
impl<T: Send> Send for Sender<T>
1.72.0source 
impl<T: Send> Sync for Sender<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Sender<T>
impl<T> Unpin for Sender<T>
impl<T> UnwindSafe for Sender<T>

Blanket Implementations

source 
impl<T> Any for T
where
    T: 'static + ?Sized,
source 
fn type_id(&self) -> TypeId
Gets the TypeId of self. Read more
source 
impl<T> Borrow<T> for T
where
    T: ?Sized,
source 
fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
source 
impl<T> BorrowMut<T> for T
where
    T: ?Sized,
source 
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source 
impl<T> From<T> for T
source 
fn from(t: T) -> T

Returns the argument unchanged.

source 
impl<T, U> Into<U> for T
where
    U: From<T>,
source 
fn into(self) -> U

Calls U::from(self).

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

source 
impl<T> ToOwned for T
where
    T: Clone,
 
type Owned = T
The resulting type after obtaining ownership.
source 
fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
source 
fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more
source 
impl<T, U> TryFrom<U> for T
where
    U: Into<T>,
 
type Error = Infallible
The type returned in the event of a conversion error.
source 
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
source 
impl<T, U> TryInto<U> for T
where
    U: TryFrom<T>,
 
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
source 
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/sync/mpsc/struct.Sender.html