From 0dd3b25e2d96f953e5087d9405893ca777ebeaec Mon Sep 17 00:00:00 2001
From: Tomoaki Kawada <kawada@kmckk.co.jp>
Date: Wed, 23 Aug 2023 16:46:26 +0900
Subject: [PATCH] kmc-solid: Implement `AsFd` for `{Arc,Rc,Box}<impl AsFd>`

---
 library/std/src/os/solid/io.rs | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/library/std/src/os/solid/io.rs b/library/std/src/os/solid/io.rs
index 67fc94830d0..683edc1ca85 100644
--- a/library/std/src/os/solid/io.rs
+++ b/library/std/src/os/solid/io.rs
@@ -271,6 +271,39 @@ macro_rules! impl_owned_fd_traits {
 }
 impl_owned_fd_traits! { TcpStream TcpListener UdpSocket }
 
+/// This impl allows implementing traits that require `AsFd` on Arc.
+/// ```
+/// # #[cfg(target_os = "solid_asp3")] mod group_cfg {
+/// # use std::os::solid::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()
+    }
+}
+
+impl<T: AsFd> AsFd for crate::rc::Rc<T> {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        (**self).as_fd()
+    }
+}
+
+impl<T: AsFd> AsFd for Box<T> {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        (**self).as_fd()
+    }
+}
+
 /// A trait to extract the raw SOLID Sockets file descriptor from an underlying
 /// object.
 pub trait AsRawFd {