Do we need to be able to work with non-blocking sockets without std.Io in Zig?

[g41797]

@g41797

My project is Single-Threaded Reactor

• non-blocked sockets
• all io on one thread
• “pool” loop (epool, kqueue, wepoll)

It’s based on 0.15.2, just plain std.posix

All my design is based on assumption that io is on single thread.

I did it on 0.15.2 but in 0.16 std.posix does not exist