Is the handle_tasks system in the async_comput example polling or blocking?

[rohel01]

Hello,

I am trying to understand the async_comput example, specifically the lines below:

) {
    for (entity, mut task) in &mut transform_tasks {
        if let Some(transform) = future::block_on(future::poll_once(&mut task.0)) {

Since we are in a system, I would expect this code to do a non blocking poll, but the future::block_on seems to indicate otherwise. Is it blocking?

Kind regards,

[Aiden2207]

It doesn't block, future::poll_once means that the future will complete immediately when .awaited or block_oned, assuming the future is well-behaved. The code here just checks to see if the future is done, and consumes the output if it is.

[rohel01]

Ok, this is what I expected.
Thank you for the clarification.