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// threads2.rs
//
// 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
//
// Execute `rustlings hint threads2` or use the `hint` watch subcommand for a
// hint.
use std::sync::Arc;
use std::thread;
use std::time::Duration;
struct JobStatus {
jobs_completed: u32,
}
fn main() {
// TODO: `Arc` isn't enough if you want a **mutable** shared state
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);
}
// Waiting for all jobs to complete
for handle in handles {
handle.join().unwrap();
}
// TODO: Print the value of `JobStatus.jobs_completed`
println!("Jobs completed: {}", ???);
}
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