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37 lines
1 KiB
Rust
37 lines
1 KiB
Rust
// This program spawns multiple threads that each run for at least 250ms, and
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// each thread returns how much time they took to complete. The program should
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// wait until all the spawned threads have finished and should collect their
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// return values into a vector.
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use std::{
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thread,
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time::{Duration, Instant},
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};
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fn main() {
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let mut handles = Vec::new();
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for i in 0..10 {
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let handle = thread::spawn(move || {
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let start = Instant::now();
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thread::sleep(Duration::from_millis(250));
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println!("Thread {i} done");
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start.elapsed().as_millis()
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});
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handles.push(handle);
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}
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let mut results = Vec::new();
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for handle in handles {
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// Collect the results of all threads into the `results` vector.
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results.push(handle.join().unwrap());
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}
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if results.len() != 10 {
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panic!("Oh no! Some thread isn't done yet!");
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}
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println!();
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for (i, result) in results.into_iter().enumerate() {
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println!("Thread {i} took {result}ms");
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}
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}
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