Rust Parallelism Starting a new thread
Example
To start a new thread:
use std::thread;
fn main() {
thread::spawn(move || {
// The main thread will not wait for this thread to finish. That
// might mean that the next println isn't even executed before the
// program exits.
println!("Hello from spawned thread");
});
let join_handle = thread::spawn(move || {
println!("Hello from second spawned thread");
// To ensure that the program waits for a thread to finish, we must
// call `join()` on its join handle. It is even possible to send a
// value to a different thread through the join handle, like the
// integer 17 in this case:
17
});
println!("Hello from the main thread");
// The above three printlns can be observed in any order.
// Block until the second spawned thread has finished.
match join_handle.join() {
Ok(x) => println!("Second spawned thread returned {}", x),
Err(_) => println!("Second spawned thread panicked")
}
}
