Upgrading Tokio for 0.2.0, adding examples with actix and actix-web

[dangerousplay]

• Removing old examples.

[Rufflewind]

Thanks for the PR! It seems tokio has native support for files nowadays. Is there still a use case for this library?

[WGH-]

Yes, tokio::fs::File doesn't seem to handle EAGAIN, so reading such file returns a WouldBlock error instead of proper "blocking" through the event loop.

[Rufflewind]

Yes, tokio::fs::File doesn't seem to handle EAGAIN, so reading such file returns a WouldBlock error instead of proper "blocking" through the event loop.

Could this issue be resolved upstream?

[WGH-]

In theory yes. However, given that the issue essentially asking for this is stalled, it's not clear whether they want to include it in the main crate: tokio-rs/tokio#2558

As an example from another language, Go runtime automatically detects that the file is non-blocking and uses the runtime poller: golang/go@ea5825b

[Rufflewind]

Thanks for the pull request!

[WGH-]

FWIW, tokio 0.3 has tokio::io::unix::AsyncFd, which looks like direct replacement.