`Mutex`

Mutex<T>를 이용하면 불변 참조를 통해서도 T의 값을 수정할 수가 있으며, 이에 더해서 한 번에 한 스레드만 T의 값을 접근(읽거나 쓰거나)함을 보장해 줍니다:

use std::sync::Mutex;

fn main() {
    let v = Mutex::new(vec![10, 20, 30]);
    println!("v: {:?}", v.lock().unwrap());

    {
        let mut guard = v.lock().unwrap();
        guard.push(40);
    }

    println!("v: {:?}", v.lock().unwrap());
}

모든 Mutex<T>는 impl<T: Send> Sync for Mutex<T>를 자동으로 구현함을 참조하세요.

Mutex in Rust looks like a collection with just one element - the protected data.
- It is not possible to forget to acquire the mutex before accessing the protected data.
You can get an &mut T from an &Mutex<T> by taking the lock. The MutexGuard ensures that the &mut T doesn’t outlive the lock being held.
Mutex<T> implements both Send and Sync iff (if and only if) T implements Send.
A read-write lock counterpart - RwLock.
Why does lock() return a Result?
- If the thread that held the Mutex panicked, the Mutex becomes “poisoned” to signal that the data it protected might be in an inconsistent state. Calling lock() on a poisoned mutex fails with a PoisonError. You can call into_inner() on the error to recover the data regardless.

Comprehensive Rust 🦀

Mutex

`Mutex`