# raw.rs - source
Source of the Rust file `/home/justine/.cargo/registry/src/github.com-1ecc6299db9ec823/io-lifetimes-1.0.3/src/raw.rs`.
Keywords: rust, rustlang, rust-lang

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    //! Portability abstractions over `Raw*`.
    //!
    //! On Unix, "everything is a file descriptor". On Windows, file/pipe/process
    //! handles are distinct from socket descriptors. This file provides a minimal
    //! layer of portability over this difference.

    #[cfg(unix)]
    use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
    #[cfg(target_os = "wasi")]
    use std::os::wasi::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
    #[cfg(windows)]
    use std::os::windows::io::{
        AsRawHandle, AsRawSocket, FromRawHandle, FromRawSocket, IntoRawHandle, IntoRawSocket,
        RawHandle, RawSocket,
    };

    /// A raw filelike object.
    ///
    /// This is a portability abstraction over Unix-like [`RawFd`] and
    /// Windows' `RawHandle`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub type RawFilelike = RawFd;

    /// A raw filelike object.
    ///
    /// This is a portability abstraction over Unix-like `RawFd` and
    /// Windows' [`RawHandle`].
    #[cfg(windows)]
    pub type RawFilelike = RawHandle;

    /// A raw socketlike object.
    ///
    /// This is a portability abstraction over Unix-like [`RawFd`] and
    /// Windows' `RawSocket`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub type RawSocketlike = RawFd;

    /// A raw socketlike object.
    ///
    /// This is a portability abstraction over Unix-like `RawFd` and
    /// Windows' [`RawSocket`].
    #[cfg(windows)]
    pub type RawSocketlike = RawSocket;

    /// A portable trait to obtain the raw value of an underlying filelike object.
    ///
    /// This is a portability abstraction over Unix-like [`AsRawFd`] and Windows'
    /// `AsRawHandle`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait AsRawFilelike: AsRawFd {
        /// Returns the raw value.
        fn as_raw_filelike(&self) -> RawFilelike;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: AsRawFd> AsRawFilelike for T {
        #[inline]
        fn as_raw_filelike(&self) -> RawFilelike {
            self.as_raw_fd()
        }
    }

    /// This is a portability abstraction over Unix-like `AsRawFd` and Windows'
    /// [`AsRawHandle`].
    #[cfg(windows)]
    pub trait AsRawFilelike: AsRawHandle {
        /// Returns the raw value.
        fn as_raw_filelike(&self) -> RawFilelike;
    }

    #[cfg(windows)]
    impl<T: AsRawHandle> AsRawFilelike for T {
        #[inline]
        fn as_raw_filelike(&self) -> RawFilelike {
            self.as_raw_handle()
        }
    }

    /// This is a portability abstraction over Unix-like [`AsRawFd`] and Windows'
    /// `AsRawSocket`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait AsRawSocketlike: AsRawFd {
        /// Returns the raw value.
        fn as_raw_socketlike(&self) -> RawSocketlike;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: AsRawFd> AsRawSocketlike for T {
        #[inline]
        fn as_raw_socketlike(&self) -> RawSocketlike {
            self.as_raw_fd()
        }
    }

    /// This is a portability abstraction over Unix-like `AsRawFd` and Windows'
    /// [`AsRawSocket`].
    #[cfg(windows)]
    pub trait AsRawSocketlike: AsRawSocket {
        /// Returns the raw value.
        fn as_raw_socketlike(&self) -> RawSocketlike;
    }

    #[cfg(windows)]
    impl<T: AsRawSocket> AsRawSocketlike for T {
        #[inline]
        fn as_raw_socketlike(&self) -> RawSocketlike {
            self.as_raw_socket()
        }
    }

    /// This is a portability abstraction over Unix-like [`IntoRawFd`] and Windows'
    /// `IntoRawHandle`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait IntoRawFilelike: IntoRawFd {
        /// Returns the raw value.
        fn into_raw_filelike(self) -> RawFilelike;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: IntoRawFd> IntoRawFilelike for T {
        #[inline]
        fn into_raw_filelike(self) -> RawFilelike {
            self.into_raw_fd()
        }
    }

    /// This is a portability abstraction over Unix-like `IntoRawFd` and Windows'
    /// [`IntoRawHandle`].
    #[cfg(windows)]
    pub trait IntoRawFilelike: IntoRawHandle {
        /// Returns the raw value.
        fn into_raw_filelike(self) -> RawFilelike;
    }

    #[cfg(windows)]
    impl<T: IntoRawHandle> IntoRawFilelike for T {
        #[inline]
        fn into_raw_filelike(self) -> RawFilelike {
            self.into_raw_handle()
        }
    }

    /// This is a portability abstraction over Unix-like [`IntoRawFd`] and Windows'
    /// `IntoRawSocket`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait IntoRawSocketlike: IntoRawFd {
        /// Returns the raw value.
        fn into_raw_socketlike(self) -> RawSocketlike;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: IntoRawFd> IntoRawSocketlike for T {
        #[inline]
        fn into_raw_socketlike(self) -> RawSocketlike {
            self.into_raw_fd()
        }
    }

    /// This is a portability abstraction over Unix-like `IntoRawFd` and Windows'
    /// [`IntoRawSocket`].
    #[cfg(windows)]
    pub trait IntoRawSocketlike: IntoRawSocket {
        /// Returns the raw value.
        fn into_raw_socketlike(self) -> RawSocketlike;
    }

    #[cfg(windows)]
    impl<T: IntoRawSocket> IntoRawSocketlike for T {
        #[inline]
        fn into_raw_socketlike(self) -> RawSocketlike {
            self.into_raw_socket()
        }
    }

    /// This is a portability abstraction over Unix-like [`FromRawFd`] and Windows'
    /// `FromRawHandle`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait FromRawFilelike: FromRawFd {
        /// Constructs `Self` from the raw value.
        ///
        /// # Safety
        ///
        /// This is `unsafe` for the same reason as [`from_raw_fd`] and
        /// [`from_raw_handle`].
        ///
        /// [`from_raw_fd`]: https://doc.rust-lang.org/stable/std/os/unix/io/trait.FromRawFd.html#tymethod.from_raw_fd
        /// [`from_raw_handle`]: https://doc.rust-lang.org/stable/std/os/windows/io/trait.FromRawHandle.html#tymethod.from_raw_handle
        unsafe fn from_raw_filelike(raw: RawFilelike) -> Self;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: FromRawFd> FromRawFilelike for T {
        #[inline]
        unsafe fn from_raw_filelike(raw: RawFilelike) -> Self {
            Self::from_raw_fd(raw)
        }
    }

    /// This is a portability abstraction over Unix-like `FromRawFd` and Windows'
    /// [`FromRawHandle`].
    #[cfg(windows)]
    pub trait FromRawFilelike: FromRawHandle {
        /// Constructs `Self` from the raw value.
        unsafe fn from_raw_filelike(raw: RawFilelike) -> Self;
    }

    #[cfg(windows)]
    impl<T: FromRawHandle> FromRawFilelike for T {
        #[inline]
        unsafe fn from_raw_filelike(raw: RawFilelike) -> Self {
            Self::from_raw_handle(raw)
        }
    }

    /// This is a portability abstraction over Unix-like [`FromRawFd`] and Windows'
    /// `FromRawSocket`.
    #[cfg(any(unix, target_os = "wasi"))]
    pub trait FromRawSocketlike: FromRawFd {
        /// Constructs `Self` from the raw value.
        ///
        /// # Safety
        ///
        /// This is `unsafe` for the same reason as [`from_raw_fd`] and
        /// [`from_raw_socket`].
        ///
        /// [`from_raw_fd`]: https://doc.rust-lang.org/stable/std/os/unix/io/trait.FromRawFd.html#tymethod.from_raw_fd
        /// [`from_raw_socket`]: https://doc.rust-lang.org/stable/std/os/windows/io/trait.FromRawSocket.html#tymethod.from_raw_socket
        unsafe fn from_raw_socketlike(raw: RawSocketlike) -> Self;
    }

    #[cfg(any(unix, target_os = "wasi"))]
    impl<T: FromRawFd> FromRawSocketlike for T {
        #[inline]
        unsafe fn from_raw_socketlike(raw: RawSocketlike) -> Self {
            Self::from_raw_fd(raw)
        }
    }

    /// This is a portability abstraction over Unix-like `FromRawFd` and Windows'
    /// [`FromRawSocket`].
    #[cfg(windows)]
    pub trait FromRawSocketlike: FromRawSocket {
        /// Constructs `Self` from the raw value.
        unsafe fn from_raw_socketlike(raw: RawSocketlike) -> Self;
    }

    #[cfg(windows)]
    impl<T: FromRawSocket> FromRawSocketlike for T {
        #[inline]
        unsafe fn from_raw_socketlike(raw: RawSocketlike) -> Self {
            Self::from_raw_socket(raw)
        }
    }