From 64d95837e9813541cf5b357de13865ce687ae98d Mon Sep 17 00:00:00 2001 From: Adam Brewer Date: Mon, 16 Oct 2023 07:37:12 -0400 Subject: Update Exercises Directory Names to Reflect Order --- exercises/20_threads/threads1.rs | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 exercises/20_threads/threads1.rs (limited to 'exercises/20_threads/threads1.rs') diff --git a/exercises/20_threads/threads1.rs b/exercises/20_threads/threads1.rs new file mode 100644 index 0000000..80b6def --- /dev/null +++ b/exercises/20_threads/threads1.rs @@ -0,0 +1,40 @@ +// threads1.rs +// +// This program spawns multiple threads that each run for at least 250ms, and +// each thread returns how much time they took to complete. The program should +// wait until all the spawned threads have finished and should collect their +// return values into a vector. +// +// Execute `rustlings hint threads1` or use the `hint` watch subcommand for a +// hint. + +// I AM NOT DONE + +use std::thread; +use std::time::{Duration, Instant}; + +fn main() { + let mut handles = vec![]; + for i in 0..10 { + handles.push(thread::spawn(move || { + let start = Instant::now(); + thread::sleep(Duration::from_millis(250)); + println!("thread {} is complete", i); + start.elapsed().as_millis() + })); + } + + let mut results: Vec = vec![]; + for handle in handles { + // TODO: a struct is returned from thread::spawn, can you use it? + } + + if results.len() != 10 { + panic!("Oh no! All the spawned threads did not finish!"); + } + + println!(); + for (i, result) in results.into_iter().enumerate() { + println!("thread {} took {}ms", i, result); + } +} -- cgit v1.2.3