Sharing mutable states

Rust's ownership and borrowing model simplifies immutable data access and transfer considerably—but what about shared states? There are many applications that require mutable access to a shared resource from multiple threads. Let's see how this is done!

How to do it...

In this recipe, we will create a very simple simulation:

1. Run cargo new black-white to create a new application project and open the directory in Visual Studio Code.
2. Open src/main.rs to add some code. First, we are going to need some imports and an enum to make our simulation interesting:

use std::sync::{Arc, Mutex};
use std::thread;
use std::time::Duration;

///
/// A simple enum with only two variations: black and white
...