crossbeam-utils 0.7.2

Utilities for concurrent programming

Crossbeam Utils

Build Status License Cargo Documentation Rust 1.28+ chat

This crate provides miscellaneous tools for concurrent programming:


  • AtomicCell, a thread-safe mutable memory location.(no_std)
  • AtomicConsume, for reading from primitive atomic types with "consume" ordering.(no_std)

Thread synchronization

  • Parker, a thread parking primitive.
  • ShardedLock, a sharded reader-writer lock with fast concurrent reads.
  • WaitGroup, for synchronizing the beginning or end of some computation.


  • Backoff, for exponential backoff in spin loops.(no_std)
  • CachePadded, for padding and aligning a value to the length of a cache line.(no_std)
  • scope, for spawning threads that borrow local variables from the stack.

*Features marked with (no_std) can be used in no_std environments.*


Add this to your Cargo.toml:

crossbeam-utils = "0.7"

Next, add this to your crate:

extern crate crossbeam_utils;


The minimum supported Rust version is 1.28. Any change to this is considered a breaking change.


Licensed under either of

at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.