Rust Shared-State Concurrency

Mutex<T>

Single thread example

use std::sync::Mutex;
 
fn main() {
    let m = Mutex::new(5);
 
    {
        let mut num = m.lock().unwrap();
        *num = 6;
    }
 
    println!("m = {:?}", m);
}

Multiple thread example

use std::sync::{Arc, Mutex};
use std::thread;
 
fn main() {
    let counter = Arc::new(Mutex::new(0));
    let mut handles = vec![];
 
    for _ in 0..10 {
        let counter = Arc::clone(&counter);
        let handle = thread::spawn(move || {
            let mut num = counter.lock().unwrap();
 
            *num += 1;
        });
        handles.push(handle);
    }
 
    for handle in handles {
        handle.join().unwrap();
    }
 
    println!("Result: {}", *counter.lock().unwrap());
}