c++ node: How to Threads?

[griffinboy]

Hello hello, it's time to pester @Christoph-Hart again.

I'm making a non-realtime effect that processes a buffer offline.

It currently bricks the UI of Hise when it runs.
Multithreading is the solution, I know that Hise already has threads set up, so I'm cautious about messing it up. I've tried traditional c++ async to no effect. This is not my area of expertise.

Is there a simple way to tap into the multithreading of Hise? Or is there a better way?

Thanks : )