Abstracting over threadpool and current_thread runtimes (tokio)

[najamelan]

It depends on the exact things you are trying to do, but you might be out of luck. Rust isn't very flexible over Send. Some discussion here:

• How often do you want non-send futures? - #118 by najamelan - language design - Rust Internals
• How do you all make your dynamic code `Send` agnostic?

There was a bunch of discussion about how to spawn from libraries here, maybe it interests you:

• Poll: Async/Await, let's talk about executors!