Multithreaded behavior of Poll

[dtolnay]

Question from i.r-l.o:

Can multiple threads call poll on the same Poll? What happens? The documentation says nothing.

[frehberg]

Is this question related to libc::poll or mio.Poll?
Neither one implements the reactor pattern (multiple threads polling same set of sockets) but are thin layers around the OS API for socket-IO.

Most underlying socket-APIs of the OS (Linux/Windows, etc.) support ::poll for read evnets from one thread and ::poll for write-events from another thread. But I am not sure if this would fit into ownership model for sockets in Rust.

[JohnColanduoni]

Is there a reason that mio::Poll protects poll() with a lock? Both epoll and kqueue are fine with concurrent epoll_wait/kevent calls on the same epoll descriptor/kqueue.

[carllerche]

Relates to #759

[carllerche]

@JohnColanduoni Yes, there is a reason, poll does more than call epoll_wait

[carllerche]

Closing due to inactivity.