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impl<T: AsFd> AsFd for {Arc,Box}<T>

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This commit is contained in:
Joshua Nelson 2022-05-27 09:39:54 -05:00
parent ed1e3512dc
commit cf483a130c
2 changed files with 33 additions and 3 deletions
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31
library/std/src/os/fd/owned.rs
View file

@ -355,3 +355,34 @@ impl From<OwnedFd> for crate::net::UdpSocket {
))))
}
}
#[stable(feature = "io_safety", since = "1.63.0")]
/// This impl allows implementing traits that require `AsFd` on Arc.
/// ```
/// # #[cfg(any(unix, target_os = "wasi"))] mod group_cfg {
/// # #[cfg(target_os = "wasi")]
/// # use std::os::wasi::io::AsFd;
/// # #[cfg(unix)]
/// # use std::os::unix::io::AsFd;
/// use std::net::UdpSocket;
/// use std::sync::Arc;
///
/// trait MyTrait: AsFd {}
/// impl MyTrait for Arc<UdpSocket> {}
/// impl MyTrait for Box<UdpSocket> {}
/// # }
/// ```
impl<T: AsFd> AsFd for crate::sync::Arc<T> {
#[inline]
fn as_fd(&self) -> BorrowedFd<'_> {
(**self).as_fd()
}
}
#[stable(feature = "io_safety", since = "1.63.0")]
impl<T: AsFd> AsFd for Box<T> {
#[inline]
fn as_fd(&self) -> BorrowedFd<'_> {
(**self).as_fd()
}
}

5
library/std/src/os/fd/raw.rs
View file

@ -223,8 +223,7 @@ impl<'a> AsRawFd for io::StderrLock<'a> {
}
}
#[stable(feature = "asraw_ptrs", since = "1.63.0")]
/// This blanket impl allows implementing custom traits that require `AsRawFd` on Arc.
/// This impl allows implementing traits that require `AsRawFd` on Arc.
/// ```
/// # #[cfg(any(unix, target_os = "wasi"))] mod group_cfg {
/// # #[cfg(target_os = "wasi")]
@ -247,7 +246,7 @@ impl<T: AsRawFd> AsRawFd for crate::sync::Arc<T> {
}
}
#[stable(feature = "asraw_ptrs", since = "1.63.0")]
#[stable(feature = "asrawfd_ptrs", since = "1.63.0")]
impl<T: AsRawFd> AsRawFd for Box<T> {
#[inline]
fn as_raw_fd(&self) -> RawFd {