tokio 1.1.0

An event-driven, non-blocking I/O platform for writing asynchronous I/O backed applications.
Documentation 
macro_rules! ready {
    ($e:expr $(,)?) => {
        match $e {
            std::task::Poll::Ready(t) => t,
            std::task::Poll::Pending => return std::task::Poll::Pending,
        }
    };
}