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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Unix-specific extensions to general I/O primitives
#![stable(feature = "rust1", since = "1.0.0")]
use fs;
use net;
use os::raw;
use sys;
use sys_common::{self, AsInner, FromInner};
/// Raw file descriptors.
#[stable(feature = "rust1", since = "1.0.0")]
pub type RawFd = raw::c_int;
/// A trait to extract the raw unix 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 `AsRawHandle`
/// and `AsRawSocket` set of traits.
#[stable(feature = "rust1", since = "1.0.0")]
pub trait AsRawFd {
/// Extracts the raw file descriptor.
///
/// This method does **not** pass ownership of the raw file descriptor
/// to the caller. The descriptor is only guarantee to be valid while
/// the original object has not yet been destroyed.
#[stable(feature = "rust1", since = "1.0.0")]
fn as_raw_fd(&self) -> RawFd;
}
/// A trait to express the ability to construct an object from a raw file
/// descriptor.
#[stable(feature = "from_raw_os", since = "1.1.0")]
pub trait FromRawFd {
/// Constructs a new instances of `Self` from the given raw file
/// descriptor.
///
/// This function **consumes ownership** of the specified file
/// descriptor. The returned object will take responsibility for closing
/// it when the object goes out of scope.
///
/// This function is also unsafe as the primitives currently returned
/// have the contract that they are the sole owner of the file
/// descriptor they are wrapping. Usage of this function could
/// accidentally allow violating this contract which can cause memory
/// unsafety in code that relies on it being true.
#[stable(feature = "from_raw_os", since = "1.1.0")]
unsafe fn from_raw_fd(fd: RawFd) -> Self;
}
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRawFd for fs::File {
fn as_raw_fd(&self) -> RawFd {
self.as_inner().fd().raw()
}
}
#[stable(feature = "from_raw_os", since = "1.1.0")]
impl FromRawFd for fs::File {
unsafe fn from_raw_fd(fd: RawFd) -> fs::File {
fs::File::from_inner(sys::fs::File::from_inner(fd))
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRawFd for net::TcpStream {
fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
}
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRawFd for net::TcpListener {
fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
}
#[stable(feature = "rust1", since = "1.0.0")]
impl AsRawFd for net::UdpSocket {
fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
}
#[stable(feature = "from_raw_os", since = "1.1.0")]
impl FromRawFd for net::TcpStream {
unsafe fn from_raw_fd(fd: RawFd) -> net::TcpStream {
let socket = sys::net::Socket::from_inner(fd);
net::TcpStream::from_inner(sys_common::net::TcpStream::from_inner(socket))
}
}
#[stable(feature = "from_raw_os", since = "1.1.0")]
impl FromRawFd for net::TcpListener {
unsafe fn from_raw_fd(fd: RawFd) -> net::TcpListener {
let socket = sys::net::Socket::from_inner(fd);
net::TcpListener::from_inner(sys_common::net::TcpListener::from_inner(socket))
}
}
#[stable(feature = "from_raw_os", since = "1.1.0")]
impl FromRawFd for net::UdpSocket {
unsafe fn from_raw_fd(fd: RawFd) -> net::UdpSocket {
let socket = sys::net::Socket::from_inner(fd);
net::UdpSocket::from_inner(sys_common::net::UdpSocket::from_inner(socket))
}
}
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