Trait AsFd 

pub trait AsFd {
    // Required method
    fn as_fd(&self) -> BorrowedFd<'_>;
}

A trait to borrow the file descriptor from an underlying object.

This is only available on unix platforms and must be imported in order to call the method. Windows platforms have a corresponding AsHandle and AsSocket set of traits.

Required Methods

fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor.

Example

use std::fs::File;

let mut f = File::open("foo.txt")?;
let borrowed_fd: BorrowedFd<'_> = f.as_fd();

Implementors

impl AsFd for compio::fs::pipe::Receiver

Available on Unix only.

impl AsFd for compio::fs::pipe::Sender

Available on Unix only.

impl AsFd for compio::fs::Dir

Available on Unix only.

impl AsFd for compio::fs::File

Available on Unix only.

impl AsFd for compio::net::TcpListener

Available on Unix only.

impl AsFd for compio::net::TcpSocket

Available on Unix only.

impl AsFd for compio::net::TcpStream

Available on Unix only.

impl AsFd for compio::net::UdpSocket

Available on Unix only.

impl AsFd for compio::net::UnixListener

Available on Unix only.

impl AsFd for compio::net::UnixSocket

Available on Unix only.

impl AsFd for compio::net::UnixStream

Available on Unix only.

impl AsFd for compio::process::ChildStderr

impl AsFd for compio::process::ChildStdin

impl AsFd for compio::process::ChildStdout

impl AsFd for std::fs::Dir

impl AsFd for std::fs::File

Available on non-Trusty only.

impl AsFd for PipeReader

Available on non-Trusty only.

impl AsFd for PipeWriter

Available on non-Trusty only.

impl AsFd for Stderr

impl AsFd for Stdin

impl AsFd for Stdout

impl AsFd for std::net::tcp::TcpListener

Available on non-Trusty only.

impl AsFd for std::net::tcp::TcpStream

Available on non-Trusty only.

impl AsFd for std::net::udp::UdpSocket

Available on non-Trusty only.

impl AsFd for PidFd

impl AsFd for std::os::unix::net::datagram::UnixDatagram

impl AsFd for std::os::unix::net::listener::UnixListener

impl AsFd for std::os::unix::net::stream::UnixStream

impl AsFd for std::process::ChildStderr

impl AsFd for std::process::ChildStdin

impl AsFd for std::process::ChildStdout

impl AsFd for CurrentDir

impl AsFd for BorrowedFd<'_>

impl AsFd for OwnedFd

impl AsFd for Poller

impl AsFd for Receiver

impl AsFd for Receiver

Available on crate feature os-ext only.

impl AsFd for Registry

Available on Unix and non-mio_unsupported_force_poll_poll and neither AIX nor ESP-IDF nor Haiku nor Fuchsia nor Hermit nor GNU/Hurd nor QNX Neutrino nor Solaris nor Play Station Vita nor Cygwin only.

impl AsFd for Sender

impl AsFd for Sender

Available on crate feature os-ext only.

impl AsFd for SignalFd

impl AsFd for Socket

impl AsFd for TcpListener

impl AsFd for TcpListener

Available on Unix or Hermit or WASI only.

impl AsFd for TcpSocket

Available on docsrs, or Unix, or WASI only.

impl AsFd for TcpStream

impl AsFd for TcpStream

Available on Unix or Hermit or WASI only.

impl AsFd for UdpSocket

impl AsFd for UdpSocket

Available on Unix or Hermit or WASI only.

impl AsFd for UnixDatagram

impl AsFd for UnixDatagram

impl AsFd for UnixListener

impl AsFd for UnixListener

impl AsFd for UnixSocket

impl AsFd for UnixStream

impl AsFd for UnixStream

impl<'a> AsFd for StderrLock<'a>

impl<'a> AsFd for StdinLock<'a>

impl<'a> AsFd for StdoutLock<'a>

impl<'fd> AsFd for PollFd<'fd>

impl<T> AsFd for &T

where T: AsFd + ?Sized,

impl<T> AsFd for &mut T

where T: AsFd + ?Sized,

impl<T> AsFd for Box<T>

where T: AsFd + ?Sized,

impl<T> AsFd for Rc<T>

where T: AsFd + ?Sized,

impl<T> AsFd for UniqueRc<T>

where T: AsFd + ?Sized,

impl<T> AsFd for Arc<T>

where T: AsFd + ?Sized,

This impl allows implementing traits that require AsFd on Arc.

use std::net::UdpSocket;
use std::sync::Arc;

trait MyTrait: AsFd {}
impl MyTrait for Arc<UdpSocket> {}
impl MyTrait for Box<UdpSocket> {}

impl<T> AsFd for compio::runtime::fd::AsyncFd<T>

where T: AsFd,

impl<T> AsFd for compio::runtime::fd::PollFd<T>

where T: AsFd,

impl<T> AsFd for SharedFd<T>

where T: AsFd,

impl<T> AsFd for Async<T>

where T: AsFd,

Available on Unix only.

impl<T> AsFd for AsyncFd<T>

where T: AsRawFd,