gecko-dev/third_party/rust/atomic

Generic Atomic<T> for Rust

A Rust library which provides a generic Atomic<T> type for all T: Copy types, unlike the standard library which only provides a few fixed atomic types (AtomicBool, AtomicIsize, AtomicUsize, AtomicPtr).

This library will use native atomic instructions if possible, and will otherwise fall back to a lock-based mechanism. You can use the Atomic::<T>::is_lock_free() function to check whether native atomic operations are supported for a given type. Note that a type must have a power-of-2 size and alignment in order to be used by native atomic instructions.

Only a subset of native atomic operations are supported on stable Rust (types which are the same size as AtomicUsize), but you can use the nightly Cargo feature on a nightly compiler to enable the full range of native atomic instructions. The nightly feature also enables const fn constructors which allow you to initialize static atomic variables.

This crate uses #![no_std] and only depends on libcore.

Documentation

Usage

Add this to your Cargo.toml:

[dependencies]
atomic = "0.4"

and this to your crate root:

extern crate atomic;

To enable nightly-only features, add this to your Cargo.toml instead:

[dependencies]
atomic = {version = "0.4", features = ["nightly"]}

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

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.