The library rightly leaves implementation of that up to the user. You're talking about mixing cooperative and preemptive threads which have very different safet

The library rightly leaves implementation of that up to the user. You're talking about mixing cooperative and preemptive threads which have very different safety and execution profiles. There are many ways to arrange and interact the two things. Trying to provide general support for something like that would just end up a complicated mess that no one actually understands properly.