From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 .../rustix/src/backend/linux_raw/event/poll_fd.rs  | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 vendor/rustix/src/backend/linux_raw/event/poll_fd.rs

(limited to 'vendor/rustix/src/backend/linux_raw/event/poll_fd.rs')

diff --git a/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs
new file mode 100644
index 0000000..9de43f2
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs
@@ -0,0 +1,98 @@
+use crate::fd::{AsFd, BorrowedFd};
+use bitflags::bitflags;
+
+bitflags! {
+    /// `POLL*` flags for use with [`poll`].
+    ///
+    /// [`poll`]: crate::event::poll
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PollFlags: u16 {
+        /// `POLLIN`
+        const IN = linux_raw_sys::general::POLLIN as u16;
+        /// `POLLPRI`
+        const PRI = linux_raw_sys::general::POLLPRI as u16;
+        /// `POLLOUT`
+        const OUT = linux_raw_sys::general::POLLOUT as u16;
+        /// `POLLRDNORM`
+        const RDNORM = linux_raw_sys::general::POLLRDNORM as u16;
+        /// `POLLWRNORM`
+        const WRNORM = linux_raw_sys::general::POLLWRNORM as u16;
+        /// `POLLRDBAND`
+        const RDBAND = linux_raw_sys::general::POLLRDBAND as u16;
+        /// `POLLWRBAND`
+        const WRBAND = linux_raw_sys::general::POLLWRBAND as u16;
+        /// `POLLERR`
+        const ERR = linux_raw_sys::general::POLLERR as u16;
+        /// `POLLHUP`
+        const HUP = linux_raw_sys::general::POLLHUP as u16;
+        /// `POLLNVAL`
+        const NVAL = linux_raw_sys::general::POLLNVAL as u16;
+        /// `POLLRDHUP`
+        const RDHUP = linux_raw_sys::general::POLLRDHUP as u16;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `struct pollfd`—File descriptor and flags for use with [`poll`].
+///
+/// [`poll`]: crate::event::poll
+#[doc(alias = "pollfd")]
+#[repr(C)]
+#[derive(Debug, Clone)]
+pub struct PollFd<'fd> {
+    pub(crate) fd: BorrowedFd<'fd>,
+    pub(crate) events: u16,
+    pub(crate) revents: u16,
+}
+
+impl<'fd> PollFd<'fd> {
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    #[inline]
+    pub fn new<Fd: AsFd>(fd: &'fd Fd, events: PollFlags) -> Self {
+        Self::from_borrowed_fd(fd.as_fd(), events)
+    }
+
+    /// Sets the contained file descriptor to `fd`.
+    #[inline]
+    pub fn set_fd<Fd: AsFd>(&mut self, fd: &'fd Fd) {
+        self.fd = fd.as_fd();
+    }
+
+    /// Clears the ready events.
+    #[inline]
+    pub fn clear_revents(&mut self) {
+        self.revents = 0;
+    }
+
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    ///
+    /// This is the same as `new`, but can be used to avoid borrowing the
+    /// `BorrowedFd`, which can be tricky in situations where the `BorrowedFd`
+    /// is a temporary.
+    #[inline]
+    pub fn from_borrowed_fd(fd: BorrowedFd<'fd>, events: PollFlags) -> Self {
+        Self {
+            fd,
+            events: events.bits(),
+            revents: 0,
+        }
+    }
+
+    /// Returns the ready events.
+    #[inline]
+    pub fn revents(&self) -> PollFlags {
+        // Use `.unwrap()` here because in theory we know we know all the bits
+        // the OS might set here, but OS's have added extensions in the past.
+        PollFlags::from_bits(self.revents).unwrap()
+    }
+}
+
+impl<'fd> AsFd for PollFd<'fd> {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.fd.as_fd()
+    }
+}
-- 
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