Way to have assertion whether something is outside of a rayon task

[Konstantin Solomatov]

I have some code which blocks (i.e. waits for a mpsc queue). Such code is bad for running inside of rayon. Is there any way to check whether the current code is inside of rayon task or not? I want to create assertions to make sure that this code isn't called from such an inappropriate context and prevent deadlocks.

[Josh Stone]

You can check rayon::current_thread_index(), which will return None outside of any pool.

[Konstantin Solomatov]

@cuviper Thank you. That's exactly what I was looking for!