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# ArcSwap
[](https://travis-ci.org/vorner/arc-swap)
[](https://ci.appveyor.com/project/vorner/arc-swap/branch/master)
This provides something similar to what `RwLock<Arc<T>>` is or what
`Atomic<Arc<T>>` would be if it existed, optimized for read-mostly write-seldom
scenarios, with consistent performance characteristics.
Read [the documentation](https://docs.rs/arc-swap) before using.
## Rust version policy
There's no hard policy yet. However, currently the crate builds with Rust 1.26
and is tested for that. There would have to be a very good reason to increase
the required version.
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](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.
[`Arc`]: https://doc.rust-lang.org/std/sync/struct.Arc.html
[`AtomicPtr`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicPtr.html
[`ArcSwap`]: https://docs.rs/arc-swap/*/arc_swap/type.ArcSwap.html
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