1 files changed, 199 insertions, 0 deletions
diff --git a/vendor/rustix/src/maybe_polyfill/no_std/os/windows/io/socket.rs b/vendor/rustix/src/maybe_polyfill/no_std/os/windows/io/socket.rs
new file mode 100644
index 000000000..bc637aa53
--- /dev/null
+++ b/vendor/rustix/src/maybe_polyfill/no_std/os/windows/io/socket.rs
@@ -0,0 +1,199 @@
+//! The following is derived from Rust's
+//! library/std/src/os/windows/io/socket.rs
+//! at revision
+//! 4f9b394c8a24803e57ba892fa00e539742ebafc0.
+//!
+//! All code in this file is licensed MIT or Apache 2.0 at your option.
+
+use super::raw::*;
+use crate::backend::c;
+use crate::backend::fd::LibcFd as LibcSocket;
+use core::fmt;
+use core::marker::PhantomData;
+use core::mem::forget;
+
+/// A borrowed socket.
+///
+/// This has a lifetime parameter to tie it to the lifetime of something that
+/// owns the socket.
+///
+/// This uses `repr(transparent)` and has the representation of a host socket,
+/// so it can be used in FFI in places where a socket is passed as an argument,
+/// it is not captured or consumed, and it never has the value
+/// `INVALID_SOCKET`.
+///
+/// This type's `.to_owned()` implementation returns another `BorrowedSocket`
+/// rather than an `OwnedSocket`. It just makes a trivial copy of the raw
+/// socket, which is then borrowed under the same lifetime.
+#[derive(Copy, Clone)]
+#[repr(transparent)]
+#[cfg_attr(staged_api, rustc_layout_scalar_valid_range_start(0))]
+// This is -2, in two's complement. -1 is `INVALID_SOCKET`.
+#[cfg_attr(
+    all(staged_api, target_pointer_width = "32"),
+    rustc_layout_scalar_valid_range_end(0xFF_FF_FF_FE)
+)]
+#[cfg_attr(
+    all(staged_api, target_pointer_width = "64"),
+    rustc_layout_scalar_valid_range_end(0xFF_FF_FF_FF_FF_FF_FF_FE)
+)]
+#[cfg_attr(staged_api, rustc_nonnull_optimization_guaranteed)]
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+pub struct BorrowedSocket<'socket> {
+    socket: RawSocket,
+    _phantom: PhantomData<&'socket OwnedSocket>,
+}
+
+/// An owned socket.
+///
+/// This closes the socket on drop.
+///
+/// This uses `repr(transparent)` and has the representation of a host socket,
+/// so it can be used in FFI in places where a socket is passed as a consumed
+/// argument or returned as an owned value, and it never has the value
+/// `INVALID_SOCKET`.
+#[repr(transparent)]
+#[cfg_attr(staged_api, rustc_layout_scalar_valid_range_start(0))]
+// This is -2, in two's complement. -1 is `INVALID_SOCKET`.
+#[cfg_attr(
+    all(staged_api, target_pointer_width = "32"),
+    rustc_layout_scalar_valid_range_end(0xFF_FF_FF_FE)
+)]
+#[cfg_attr(
+    all(staged_api, target_pointer_width = "64"),
+    rustc_layout_scalar_valid_range_end(0xFF_FF_FF_FF_FF_FF_FF_FE)
+)]
+#[cfg_attr(staged_api, rustc_nonnull_optimization_guaranteed)]
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+pub struct OwnedSocket {
+    socket: RawSocket,
+}
+
+impl BorrowedSocket<'_> {
+    /// Return a `BorrowedSocket` holding the given raw socket.
+    ///
+    /// # Safety
+    ///
+    /// The resource pointed to by `raw` must remain open for the duration of
+    /// the returned `BorrowedSocket`, and it must not have the value
+    /// `INVALID_SOCKET`.
+    #[inline]
+    #[cfg_attr(
+        staged_api,
+        rustc_const_stable(feature = "io_safety", since = "1.63.0")
+    )]
+    #[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+    pub const unsafe fn borrow_raw(socket: RawSocket) -> Self {
+        assert!(socket != c::INVALID_SOCKET as RawSocket);
+        Self {
+            socket,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl AsRawSocket for BorrowedSocket<'_> {
+    #[inline]
+    fn as_raw_socket(&self) -> RawSocket {
+        self.socket
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl AsRawSocket for OwnedSocket {
+    #[inline]
+    fn as_raw_socket(&self) -> RawSocket {
+        self.socket
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl IntoRawSocket for OwnedSocket {
+    #[inline]
+    fn into_raw_socket(self) -> RawSocket {
+        let socket = self.socket;
+        forget(self);
+        socket
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl FromRawSocket for OwnedSocket {
+    #[inline]
+    unsafe fn from_raw_socket(socket: RawSocket) -> Self {
+        debug_assert_ne!(socket, c::INVALID_SOCKET as RawSocket);
+        Self { socket }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl Drop for OwnedSocket {
+    #[inline]
+    fn drop(&mut self) {
+        unsafe {
+            let _ = c::closesocket(self.socket as LibcSocket);
+        }
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl fmt::Debug for BorrowedSocket<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("BorrowedSocket")
+            .field("socket", &self.socket)
+            .finish()
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl fmt::Debug for OwnedSocket {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("OwnedSocket")
+            .field("socket", &self.socket)
+            .finish()
+    }
+}
+
+/// A trait to borrow the socket from an underlying object.
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+pub trait AsSocket {
+    /// Borrows the socket.
+    #[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+    fn as_socket(&self) -> BorrowedSocket<'_>;
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl<T: AsSocket> AsSocket for &T {
+    #[inline]
+    fn as_socket(&self) -> BorrowedSocket<'_> {
+        T::as_socket(self)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl<T: AsSocket> AsSocket for &mut T {
+    #[inline]
+    fn as_socket(&self) -> BorrowedSocket<'_> {
+        T::as_socket(self)
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl AsSocket for BorrowedSocket<'_> {
+    #[inline]
+    fn as_socket(&self) -> BorrowedSocket<'_> {
+        *self
+    }
+}
+
+#[cfg_attr(staged_api, stable(feature = "io_safety", since = "1.63.0"))]
+impl AsSocket for OwnedSocket {
+    #[inline]
+    fn as_socket(&self) -> BorrowedSocket<'_> {
+        // Safety: `OwnedSocket` and `BorrowedSocket` have the same validity
+        // invariants, and the `BorrowdSocket` is bounded by the lifetime
+        // of `&self`.
+        unsafe { BorrowedSocket::borrow_raw(self.as_raw_socket()) }
+    }
+}