TcpStream clones count as same Evented handler

[khionu]

I'm not sure if this counts as a bug or if it's just a detail that needs to be documented, but this is apparently not possible.

Example:

let mut tx = TcpStream::connect(...)?;
let mut rx = stream.try_clone()?;

poll.register(&tx, Token(1), Ready::writable(), PollOpt::edge())?;
poll.register(&rx, Token(2), Ready::readable(), PollOpt::edge())?; // Error: bug or illegal?

Error:

Os { code: 87, kind: Other, message: "The parameter is incorrect." }

The issue I see is that the docs say that the clone produces an independent handle, which should mean this is allowed.

System: Windows 10 1903 x64
Mio: 0.6.21

[Thomasdezeeuw]

@khionu try_clone has many problems, this could very well be one of them. For Mio 0.7 try_clone is going to be removed, see #1178 and #1184. Based on that I'm going to close this.

If you still need to split the reading and writing side I would suggest an Arc and then you can read and write safely.

[khionu]

Alrighty, thank you very much.