Rust Essentials - Second Edition

Creating threads

A thread can be created by spawning it; this creates an independent detached child thread that in general can outlive its parent. This is demonstrated in the following code snippet:

// code from Chapter 9/code/thread_spawn.rs:  
use std::thread; 
use std::time; 
 
fn main() { 
    thread::spawn(move || { 
 println!("Hello from the goblin in the spawned thread!"); 
    }); 
} 

The argument to spawn is a closure (here, without parameters, it is indicated as ||), which is scheduled to execute independently from the parent thread, which is shown here as main(). Notice that it is a moving closure which takes ownership of the variables in a given context. Our closure here is a simple print statement, but in a real situation this could be replaced ...