791120c0c1
- Switch from a single additional thread (receiving/holding a single `Arc::clone` reference) running a loop modeling 10 sequential jobs, to a loop generating 10 threads each modeling 1 job (each getting their own `Arc::clone` reference) - use the previously ignored `for` loop var to keep the execution timing approx the same - Print a more descriptive waiting message (taking an opportunity to use comment to disambiguate the count)
33 lines
954 B
Rust
33 lines
954 B
Rust
// threads1.rs
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// Make this compile! Execute `rustlings hint threads1` for hints :)
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// The idea is the threads spawned on line 22 are completing jobs while the main thread is
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// monitoring progress until 10 jobs are 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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for i in 0..10 {
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let status_ref = Arc::clone(&status);
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thread::spawn(move || {
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thread::sleep(Duration::from_millis(250 * i));
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status_ref.jobs_completed += 1;
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});
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}
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while status.jobs_completed < 10 {
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println!("waiting for {} jobs ({} jobs running)... ",
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(10 - status.jobs_completed),
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(Arc::strong_count(&status) - 1) // subtract one for refrence in _this_ thread
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);
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thread::sleep(Duration::from_millis(500));
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}
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}
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