A mutex for Rust that never deadlocks.
A Slock, or Smart Lock, is a smart wrapper around an atomically reference counted read/write lock.
All accesses and modifications are done in a contained manner. This ensures that threads will never deadlock on a Slock operation.
// Create a new lock with an initial value
let lock = Slock::new(5i32);
// Change the lock's value
lock.set(|v| v + 1).await;
// Get the lock's value if Copy
let value = lock.get().await;
// Get the lock's value if Clone
let value = lock.get_clone().await;
assert_eq!(value, 6);It's also possible to extract only the data you need from larger structures without the need to clone the entire thing.
struct User {
name: String,
age: i32,
}
let user = Slock::new(User {
name: "Bob",
age: 32,
});
// Extract something that is Copy
let age = user.map(|v| v.age).await;
// Extract something that is Clone
let name = user.map(|v| v.name.clone()).await;
// Increment `age` by 1
user.set(|v| v.age += 1).await;