1# Fragile 2 3[](https://github.com/mitsuhiko/fragile/actions?query=workflow%3ATests) 4[](https://crates.io/crates/fragile) 5[](https://github.com/mitsuhiko/fragile/blob/master/LICENSE) 6[](https://img.shields.io/badge/rust-1.42%2B-orange.svg) 7[](https://docs.rs/fragile) 8 9This library provides wrapper types that permit sending non Send types to other 10threads and use runtime checks to ensure safety. 11 12It provides the `Fragile<T>`, `Sticky<T>` and `SemiSticky<T>` types which are 13similar in nature but have different behaviors with regards to how destructors 14are executed. The `Fragile<T>` will panic if the destructor is called in another 15thread, `Sticky<T>` will temporarily leak the object until the thread shuts down. 16`SemiSticky<T>` is a compromise of the two. It behaves like `Sticky<T>` but it 17avoids the use of thread local storage if the type does not need `Drop`. 18 19## Example 20 21```rust 22use std::thread; 23 24// creating and using a fragile object in the same thread works 25let val = Fragile::new(true); 26assert_eq!(*val.get(), true); 27assert!(val.try_get().is_ok()); 28 29// once send to another thread it stops working 30thread::spawn(move || { 31 assert!(val.try_get().is_err()); 32}).join() 33 .unwrap(); 34``` 35 36## License and Links 37 38- [Documentation](https://docs.rs/fragile/) 39- [Issue Tracker](https://github.com/mitsuhiko/fragile/issues) 40- License: [Apache 2.0](https://github.com/mitsuhiko/fragile/blob/master/LICENSE) 41