async-oneshot-channel

A simple (<150 LoC, dependency-free) "oneshot" channel for asynchronously sending a single value between tasks, in a thread-safe and async-runtime-agnostic manner. This implementation supports cloned senders while ensuring only one send operation will succeed.

Usage

use futures::executor::block_on;

// Create a new channel
let (tx, rx) = oneshot();

// Send a value
tx.send(42).unwrap();

// Receive the value asynchronously
let result = block_on(rx.recv());
assert_eq!(result, Some(42));

Features

• Multiple senders (through cloning) with guaranteed single-use semantics
• Async support for receiver, instant send.
• Zero unsafe code in the public API, one unsafe line enforcing MaybeUninit safety.
• Thread-safe: implements Send and Sync where appropriate
• Cancellation support: receivers get None if all senders drop

Licensed under the MIT license.