Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 223 insertions, 0 deletions

diff --git a/third_party/rust/tokio/src/signal/windows.rs b/third_party/rust/tokio/src/signal/windows.rs
new file mode 100644
index 0000000000..11ec6cb08c
--- /dev/null
+++ b/third_party/rust/tokio/src/signal/windows.rs
@@ -0,0 +1,223 @@
+//! Windows-specific types for signal handling.
+//!
+//! This module is only defined on Windows and allows receiving "ctrl-c"
+//! and "ctrl-break" notifications. These events are listened for via the
+//! `SetConsoleCtrlHandler` function which receives events of the type
+//! `CTRL_C_EVENT` and `CTRL_BREAK_EVENT`.
+
+#![cfg(any(windows, docsrs))]
+#![cfg_attr(docsrs, doc(cfg(all(windows, feature = "signal"))))]
+
+use crate::signal::RxFuture;
+use std::io;
+use std::task::{Context, Poll};
+
+#[cfg(not(docsrs))]
+#[path = "windows/sys.rs"]
+mod imp;
+#[cfg(not(docsrs))]
+pub(crate) use self::imp::{OsExtraData, OsStorage};
+
+#[cfg(docsrs)]
+#[path = "windows/stub.rs"]
+mod imp;
+
+/// Creates a new stream which receives "ctrl-c" notifications sent to the
+/// process.
+///
+/// # Examples
+///
+/// ```rust,no_run
+/// use tokio::signal::windows::ctrl_c;
+///
+/// #[tokio::main]
+/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
+///     // An infinite stream of CTRL-C events.
+///     let mut stream = ctrl_c()?;
+///
+///     // Print whenever a CTRL-C event is received.
+///     for countdown in (0..3).rev() {
+///         stream.recv().await;
+///         println!("got CTRL-C. {} more to exit", countdown);
+///     }
+///
+///     Ok(())
+/// }
+/// ```
+pub fn ctrl_c() -> io::Result<CtrlC> {
+    Ok(CtrlC {
+        inner: self::imp::ctrl_c()?,
+    })
+}
+
+/// Represents a stream which receives "ctrl-c" notifications sent to the process
+/// via `SetConsoleCtrlHandler`.
+///
+/// A notification to this process notifies *all* streams listening for
+/// this event. Moreover, the notifications **are coalesced** if they aren't processed
+/// quickly enough. This means that if two notifications are received back-to-back,
+/// then the stream may only receive one item about the two notifications.
+#[must_use = "streams do nothing unless polled"]
+#[derive(Debug)]
+pub struct CtrlC {
+    inner: RxFuture,
+}
+
+impl CtrlC {
+    /// Receives the next signal notification event.
+    ///
+    /// `None` is returned if no more events can be received by this stream.
+    ///
+    /// # Examples
+    ///
+    /// ```rust,no_run
+    /// use tokio::signal::windows::ctrl_c;
+    ///
+    /// #[tokio::main]
+    /// async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    ///     // An infinite stream of CTRL-C events.
+    ///     let mut stream = ctrl_c()?;
+    ///
+    ///     // Print whenever a CTRL-C event is received.
+    ///     for countdown in (0..3).rev() {
+    ///         stream.recv().await;
+    ///         println!("got CTRL-C. {} more to exit", countdown);
+    ///     }
+    ///
+    ///     Ok(())
+    /// }
+    /// ```
+    pub async fn recv(&mut self) -> Option<()> {
+        self.inner.recv().await
+    }
+
+    /// Polls to receive the next signal notification event, outside of an
+    /// `async` context.
+    ///
+    /// `None` is returned if no more events can be received by this stream.
+    ///
+    /// # Examples
+    ///
+    /// Polling from a manually implemented future
+    ///
+    /// ```rust,no_run
+    /// use std::pin::Pin;
+    /// use std::future::Future;
+    /// use std::task::{Context, Poll};
+    /// use tokio::signal::windows::CtrlC;
+    ///
+    /// struct MyFuture {
+    ///     ctrl_c: CtrlC,
+    /// }
+    ///
+    /// impl Future for MyFuture {
+    ///     type Output = Option<()>;
+    ///
+    ///     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+    ///         println!("polling MyFuture");
+    ///         self.ctrl_c.poll_recv(cx)
+    ///     }
+    /// }
+    /// ```
+    pub fn poll_recv(&mut self, cx: &mut Context<'_>) -> Poll<Option<()>> {
+        self.inner.poll_recv(cx)
+    }
+}
+
+/// Represents a stream which receives "ctrl-break" notifications sent to the process
+/// via `SetConsoleCtrlHandler`.
+///
+/// A notification to this process notifies *all* streams listening for
+/// this event. Moreover, the notifications **are coalesced** if they aren't processed
+/// quickly enough. This means that if two notifications are received back-to-back,
+/// then the stream may only receive one item about the two notifications.
+#[must_use = "streams do nothing unless polled"]
+#[derive(Debug)]
+pub struct CtrlBreak {
+    inner: RxFuture,
+}
+
+impl CtrlBreak {
+    /// Receives the next signal notification event.
+    ///
+    /// `None` is returned if no more events can be received by this stream.
+    ///
+    /// # Examples
+    ///
+    /// ```rust,no_run
+    /// use tokio::signal::windows::ctrl_break;
+    ///
+    /// #[tokio::main]
+    /// async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    ///     // An infinite stream of CTRL-BREAK events.
+    ///     let mut stream = ctrl_break()?;
+    ///
+    ///     // Print whenever a CTRL-BREAK event is received.
+    ///     loop {
+    ///         stream.recv().await;
+    ///         println!("got signal CTRL-BREAK");
+    ///     }
+    /// }
+    /// ```
+    pub async fn recv(&mut self) -> Option<()> {
+        self.inner.recv().await
+    }
+
+    /// Polls to receive the next signal notification event, outside of an
+    /// `async` context.
+    ///
+    /// `None` is returned if no more events can be received by this stream.
+    ///
+    /// # Examples
+    ///
+    /// Polling from a manually implemented future
+    ///
+    /// ```rust,no_run
+    /// use std::pin::Pin;
+    /// use std::future::Future;
+    /// use std::task::{Context, Poll};
+    /// use tokio::signal::windows::CtrlBreak;
+    ///
+    /// struct MyFuture {
+    ///     ctrl_break: CtrlBreak,
+    /// }
+    ///
+    /// impl Future for MyFuture {
+    ///     type Output = Option<()>;
+    ///
+    ///     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+    ///         println!("polling MyFuture");
+    ///         self.ctrl_break.poll_recv(cx)
+    ///     }
+    /// }
+    /// ```
+    pub fn poll_recv(&mut self, cx: &mut Context<'_>) -> Poll<Option<()>> {
+        self.inner.poll_recv(cx)
+    }
+}
+
+/// Creates a new stream which receives "ctrl-break" notifications sent to the
+/// process.
+///
+/// # Examples
+///
+/// ```rust,no_run
+/// use tokio::signal::windows::ctrl_break;
+///
+/// #[tokio::main]
+/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
+///     // An infinite stream of CTRL-BREAK events.
+///     let mut stream = ctrl_break()?;
+///
+///     // Print whenever a CTRL-BREAK event is received.
+///     loop {
+///         stream.recv().await;
+///         println!("got signal CTRL-BREAK");
+///     }
+/// }
+/// ```
+pub fn ctrl_break() -> io::Result<CtrlBreak> {
+    Ok(CtrlBreak {
+        inner: self::imp::ctrl_break()?,
+    })
+}