Question: Are we intended to pass contexts between threads?

[ckaran]

I want to eventually write a crate that is like a mashup between a coroutine library and futures. That is, there are a very large set of coroutines that are being multiplexed onto a small number of threads in a thread pool. When a coroutine is blocked waiting for something, I want to save its context, and put it into a ring buffer to try again at a later date. The issue is that the thread that saved the context may not be the thread that picks up the context to continue execution. Is this a supported mode of operation? I did read the requirement that all pointers in the non-volatile registers must still be valid, which I think I can ensure by either requiring closures with move semantics, or closures that only reference stuff on the heap, but I didn't see anything else to suggest that what I'm doing is right or wrong.