Mastering Rust - Second Edition

Thread basics

As we said, every program starts with a main thread. To create an independent execution point from anywhere in the program, the main thread can spawn a new thread, which becomes its child thread. Child threads can further spawn their own threads. Let's look at a concurrent program in Rust that uses threads in the simplest way possible:

// thread_basics.rsuse std::thread;fn main() {    thread::spawn(|| {        println!("Thread!");        "Much concurrent, such wow!".to_string()    });    print!("Hello ");}

In main, we call the spawn function from the thread module which takes a no parameter closure as an argument. Within this closure, we can write any code that we want to execute concurrently as a separate thread. In our closure, we simply print some ...