Example on how to schedule coro on another scheduler?

[dsvua]

I am confused on how I can schedule coro on another scheduler. For example if I want to schedule coro on unit_pool from coro on lazy_pool. Also, would coro on lazy_pool wait for coro on unit_pool? An example usage is to schedule slow disk IO reads/writes to unit_pool and not wait for them. However, I am not sure how to implement such case. Any help is appreciated.

[dsvua]

Another example usage: SDL library requires all communications to created window to be done from the same thread which creates window and unit_pool fits perfectly. When all calculations and game main loop can use lazy_pool. However, I would need to schedule coros from unit_pool in lazy_pool and vise versa.