Parallelizing a self modifying loop in Rust

Question

I have a loop in Rust, which basically looks like this:

while let Some(next) = myqueue.pop_front() {
   let result = next.activate();
   if result.0 {
      myqueue.extend(result.1.into_iter());
   }
}

I want to paralelize this loop. Naturally, rayon crate came to my mind with the parallel executed for_each loop however the problem is that would require myqueue object to be owned by both the main thread and the child threads since the collection that is being iterated over is being modified by the threads and I do not want to use an unsafe block. Therefore, I got stuck and wanted to help with rayon create over this (or maybe a completely different approach).

Any and all help is welcome.

Thank you!