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41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
// threads1.rs
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//
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// 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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//
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// Execute `rustlings hint threads1` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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use std::thread;
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use std::time::{Duration, Instant};
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fn main() {
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let mut handles = vec![];
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for i in 0..10 {
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handles.push(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 {} is complete", i);
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start.elapsed().as_millis()
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}));
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}
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let mut results: Vec<u128> = vec![];
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for handle in handles {
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// TODO: a struct is returned from thread::spawn, can you use it?
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}
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if results.len() != 10 {
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panic!("Oh no! All the spawned threads did not finish!");
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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 {} took {}ms", i, result);
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}
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}
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