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