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    use std::fs::File;
    use std::io::{Read, Write};
    use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};

    use libc;

    use {io, Ready, Poll, PollOpt, Token};
    use event::Evented;
    use unix::EventedFd;
    use sys::unix::cvt;

    pub fn set_nonblock(fd: libc::c_int) -> io::Result<()> {
        unsafe {
            let flags = libc::fcntl(fd, libc::F_GETFL);
            cvt(libc::fcntl(fd, libc::F_SETFL, flags | libc::O_NONBLOCK)).map(|_|())
        }
    }

    pub fn set_cloexec(fd: libc::c_int) -> io::Result<()> {
        unsafe {
            let flags = libc::fcntl(fd, libc::F_GETFD);
            cvt(libc::fcntl(fd, libc::F_SETFD, flags | libc::FD_CLOEXEC)).map(|_| ())
        }
    }

    /*
     *
     * ===== Basic IO type =====
     *
     */

    /// Manages a FD
    #[derive(Debug)]
    pub struct Io {
        fd: File,
    }

    impl Io {
        /// Try to clone the FD
        pub fn try_clone(&self) -> io::Result<Io> {
            Ok(Io { fd: self.fd.try_clone()? })
        }
    }

    impl FromRawFd for Io {
        unsafe fn from_raw_fd(fd: RawFd) -> Io {
            Io { fd: File::from_raw_fd(fd) }
        }
    }

    impl IntoRawFd for Io {
        fn into_raw_fd(self) -> RawFd {
            self.fd.into_raw_fd()
        }
    }

    impl AsRawFd for Io {
        fn as_raw_fd(&self) -> RawFd {
            self.fd.as_raw_fd()
        }
    }

    impl Evented for Io {
        fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
            EventedFd(&self.as_raw_fd()).register(poll, token, interest, opts)
        }

        fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
            EventedFd(&self.as_raw_fd()).reregister(poll, token, interest, opts)
        }

        fn deregister(&self, poll: &Poll) -> io::Result<()> {
            EventedFd(&self.as_raw_fd()).deregister(poll)
        }
    }

    impl Read for Io {
        fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
            (&self.fd).read(dst)
        }
    }

    impl<'a> Read for &'a Io {
        fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
            (&self.fd).read(dst)
        }
    }

    impl Write for Io {
        fn write(&mut self, src: &[u8]) -> io::Result<usize> {
            (&self.fd).write(src)
        }

        fn flush(&mut self) -> io::Result<()> {
            (&self.fd).flush()
        }
    }

    impl<'a> Write for &'a Io {
        fn write(&mut self, src: &[u8]) -> io::Result<usize> {
            (&self.fd).write(src)
        }

        fn flush(&mut self) -> io::Result<()> {
            (&self.fd).flush()
        }
    }

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