// threads2.rs // Execute `rustlings hint threads2` or use the `hint` watch subcommand for a hint. // Building on the last exercise, we want all of the threads to complete their work but this time // the spawned threads need to be in charge of updating a shared value: JobStatus.jobs_completed // I AM NOT DONE use std::sync::Arc; use std::thread; use std::time::Duration; struct JobStatus { jobs_completed: u32, } fn main() { let status = Arc::new(JobStatus { jobs_completed: 0 }); let mut handles = vec![]; for _ in 0..10 { let status_shared = Arc::clone(&status); let handle = thread::spawn(move || { thread::sleep(Duration::from_millis(250)); // TODO: You must take an action before you update a shared value status_shared.jobs_completed += 1; }); handles.push(handle); } for handle in handles { handle.join().unwrap(); // TODO: Print the value of the JobStatus.jobs_completed. Did you notice anything // interesting in the output? Do you have to 'join' on all the handles? println!("jobs completed {}", ???); } }