Only one thread can be waiting for I/O events at a time

[miaomiao1992]

if i let main thread wait for accept events，and i let other threads wait for read events just like main-sub reactor，what will happen？

[notgull]

If another thread attempts to wait() on the Poller, it will immediately return Ok(0). This is because platforms have inconsistent behavior for waiting on multiple threads.

[notgull]

See also: https://github.com/smol-rs/polling/issues/69