blob: be1301d7388e20ef623d0ec1bbbd4b162be75428 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// 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.
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<u128> = 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);
}
}
|
