1# async-lock 2 3[![Build](https://github.com/smol-rs/async-lock/workflows/Build%20and%20test/badge.svg)]( 4https://github.com/smol-rs/async-lock/actions) 5[![License](https://img.shields.io/badge/license-Apache--2.0_OR_MIT-blue.svg)]( 6https://github.com/smol-rs/async-lock) 7[![Cargo](https://img.shields.io/crates/v/async-lock.svg)]( 8https://crates.io/crates/async-lock) 9[![Documentation](https://docs.rs/async-lock/badge.svg)]( 10https://docs.rs/async-lock) 11 12Async synchronization primitives. 13 14This crate provides the following primitives: 15 16* `Barrier` - enables tasks to synchronize all together at the same time. 17* `Mutex` - a mutual exclusion lock. 18* `RwLock` - a reader-writer lock, allowing any number of readers or a single writer. 19* `Semaphore` - limits the number of concurrent operations. 20 21## License 22 23Licensed under either of 24 25 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) 26 * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) 27 28at your option. 29 30#### Contribution 31 32Unless you explicitly state otherwise, any contribution intentionally submitted 33for inclusion in the work by you, as defined in the Apache-2.0 license, shall be 34dual licensed as above, without any additional terms or conditions. 35