How to await for tasks in progress?

[dmiedev]

Hello, I'd like to ask a question.
I use amphp/parallel for recursive tasks -- I submit one task, then I await for the result data and submit more tasks based on this data, and so on.
Is there a good way how to await for tasks to be completed in this case? I would like to execute certain code in the main thread after the completion of all tasks before exiting the script.
Thanks in advance

[kelunik]

There are multiple primitives that can help you there, one of them is a Barrier: https://github.com/amphp/sync/blob/2.x/src/Barrier.php

Every time you enqueue a new task, you can call register there and call Barrier::await() after your initial submit.

[dmiedev]

This looks good, thank you!