darc - Dynamically-atomic reference-counting pointers

This is a proof of concept of a Rust Rc<T> type that can dynamically choose whether to use atomic access to update its reference count. A related Arc<T> can be created which offers thread-safe (Send + Sync) access to the same data. If there's never an Arc, the Rc never pays the price for atomics.

darc currently requires rustc 1.31.0 or greater.

License

Licensed under either of

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