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async_compute example: don't block in the task (#13699)

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# Objective

- Fixes #13672 

## Solution

- Don't use blocking sleep in the tasks, so that it won't block the task
pool
This commit is contained in:
François Mockers 2024-06-06 02:21:33 +02:00 committed by GitHub
parent 3d9b1e4025
commit 95edd2ea71
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GPG Key ID: B5690EEEBB952194
2 changed files with 4 additions and 5 deletions
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1
Cargo.toml
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@ -354,6 +354,7 @@ serde = { version = "1", features = ["derive"] }
bytemuck = "1.7" bytemuck = "1.7"
# Needed to poll Task examples # Needed to poll Task examples
futures-lite = "2.0.1" futures-lite = "2.0.1"
async-std = "1.12"
crossbeam-channel = "0.5.0" crossbeam-channel = "0.5.0"
argh = "0.1.12" argh = "0.1.12"
thiserror = "1.0" thiserror = "1.0"

8
examples/async_tasks/async_compute.rs
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@ -8,7 +8,7 @@ use bevy::{
tasks::{block_on, futures_lite::future, AsyncComputeTaskPool, Task}, tasks::{block_on, futures_lite::future, AsyncComputeTaskPool, Task},
}; };
use rand::Rng; use rand::Rng;
use std::{thread, time::Duration}; use std::time::Duration;
fn main() { fn main() {
App::new() App::new()
@ -60,12 +60,10 @@ fn spawn_tasks(mut commands: Commands) {
// spawn() can be used to poll for the result // spawn() can be used to poll for the result
let entity = commands.spawn_empty().id(); let entity = commands.spawn_empty().id();
let task = thread_pool.spawn(async move { let task = thread_pool.spawn(async move {
let mut rng = rand::thread_rng(); let duration = Duration::from_secs_f32(rand::thread_rng().gen_range(0.05..5.0));
let duration = Duration::from_secs_f32(rng.gen_range(0.05..0.2));
// Pretend this is a time-intensive function. :) // Pretend this is a time-intensive function. :)
thread::sleep(duration); async_std::task::sleep(duration).await;
// Such hard work, all done! // Such hard work, all done!
let transform = Transform::from_xyz(x as f32, y as f32, z as f32); let transform = Transform::from_xyz(x as f32, y as f32, z as f32);