Struct std::sync::mpsc::Sender

1.0.0 · source · []
pub struct Sender<T> { /* private fields */ }
Expand description

The sending-half of Rust’s asynchronous channel type. This half can only be owned by one thread, but it can be cloned to send to other threads.

Messages can be sent through this channel with send.

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


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

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

// First thread owns sender
thread::spawn(move || {

// Second thread owns sender2
thread::spawn(move || {

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

assert_eq!(3, msg + msg2);


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.

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

let (tx, rx) = channel();

// This send is always successful

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

Trait Implementations

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.

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Executes the destructor for this type. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

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

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.