| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.8/src/sys/unix/pipe.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>pipe.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../mio/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../mio/index.html"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! Unix pipe. |
| //! |
| //! See the [`new`] function for documentation. |
| |
| </span><span class="kw">use </span>std::fs::File; |
| <span class="kw">use </span>std::io::{<span class="self">self</span>, IoSlice, IoSliceMut, Read, Write}; |
| <span class="kw">use </span>std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd}; |
| <span class="kw">use </span>std::process::{ChildStderr, ChildStdin, ChildStdout}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::io_source::IoSource; |
| <span class="kw">use crate</span>::{event, Interest, Registry, Token}; |
| |
| <span class="doccomment">/// Create a new non-blocking Unix pipe. |
| /// |
| /// This is a wrapper around Unix's [`pipe(2)`] system call and can be used as |
| /// inter-process or thread communication channel. |
| /// |
| /// This channel may be created before forking the process and then one end used |
| /// in each process, e.g. the parent process has the sending end to send command |
| /// to the child process. |
| /// |
| /// [`pipe(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/pipe.html |
| /// |
| /// # Events |
| /// |
| /// The [`Sender`] can be registered with [`WRITABLE`] interest to receive |
| /// [writable events], the [`Receiver`] with [`READABLE`] interest. Once data is |
| /// written to the `Sender` the `Receiver` will receive an [readable event]. |
| /// |
| /// In addition to those events, events will also be generated if the other side |
| /// is dropped. To check if the `Sender` is dropped you'll need to check |
| /// [`is_read_closed`] on events for the `Receiver`, if it returns true the |
| /// `Sender` is dropped. On the `Sender` end check [`is_write_closed`], if it |
| /// returns true the `Receiver` was dropped. Also see the second example below. |
| /// |
| /// [`WRITABLE`]: Interest::WRITABLE |
| /// [writable events]: event::Event::is_writable |
| /// [`READABLE`]: Interest::READABLE |
| /// [readable event]: event::Event::is_readable |
| /// [`is_read_closed`]: event::Event::is_read_closed |
| /// [`is_write_closed`]: event::Event::is_write_closed |
| /// |
| /// # Deregistering |
| /// |
| /// Both `Sender` and `Receiver` will deregister themselves when dropped, |
| /// **iff** the file descriptors are not duplicated (via [`dup(2)`]). |
| /// |
| /// [`dup(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.html |
| /// |
| /// # Examples |
| /// |
| /// Simple example that writes data into the sending end and read it from the |
| /// receiving end. |
| /// |
| /// ``` |
| /// use std::io::{self, Read, Write}; |
| /// |
| /// use mio::{Poll, Events, Interest, Token}; |
| /// use mio::unix::pipe; |
| /// |
| /// // Unique tokens for the two ends of the channel. |
| /// const PIPE_RECV: Token = Token(0); |
| /// const PIPE_SEND: Token = Token(1); |
| /// |
| /// # fn main() -> io::Result<()> { |
| /// // Create our `Poll` instance and the `Events` container. |
| /// let mut poll = Poll::new()?; |
| /// let mut events = Events::with_capacity(8); |
| /// |
| /// // Create a new pipe. |
| /// let (mut sender, mut receiver) = pipe::new()?; |
| /// |
| /// // Register both ends of the channel. |
| /// poll.registry().register(&mut receiver, PIPE_RECV, Interest::READABLE)?; |
| /// poll.registry().register(&mut sender, PIPE_SEND, Interest::WRITABLE)?; |
| /// |
| /// const MSG: &[u8; 11] = b"Hello world"; |
| /// |
| /// loop { |
| /// poll.poll(&mut events, None)?; |
| /// |
| /// for event in events.iter() { |
| /// match event.token() { |
| /// PIPE_SEND => sender.write(MSG) |
| /// .and_then(|n| if n != MSG.len() { |
| /// // We'll consider a short write an error in this |
| /// // example. NOTE: we can't use `write_all` with |
| /// // non-blocking I/O. |
| /// Err(io::ErrorKind::WriteZero.into()) |
| /// } else { |
| /// Ok(()) |
| /// })?, |
| /// PIPE_RECV => { |
| /// let mut buf = [0; 11]; |
| /// let n = receiver.read(&mut buf)?; |
| /// println!("received: {:?}", &buf[0..n]); |
| /// assert_eq!(n, MSG.len()); |
| /// assert_eq!(&buf, &*MSG); |
| /// return Ok(()); |
| /// }, |
| /// _ => unreachable!(), |
| /// } |
| /// } |
| /// } |
| /// # } |
| /// ``` |
| /// |
| /// Example that receives an event once the `Sender` is dropped. |
| /// |
| /// ``` |
| /// # use std::io; |
| /// # |
| /// # use mio::{Poll, Events, Interest, Token}; |
| /// # use mio::unix::pipe; |
| /// # |
| /// # const PIPE_RECV: Token = Token(0); |
| /// # const PIPE_SEND: Token = Token(1); |
| /// # |
| /// # fn main() -> io::Result<()> { |
| /// // Same setup as in the example above. |
| /// let mut poll = Poll::new()?; |
| /// let mut events = Events::with_capacity(8); |
| /// |
| /// let (mut sender, mut receiver) = pipe::new()?; |
| /// |
| /// poll.registry().register(&mut receiver, PIPE_RECV, Interest::READABLE)?; |
| /// poll.registry().register(&mut sender, PIPE_SEND, Interest::WRITABLE)?; |
| /// |
| /// // Drop the sender. |
| /// drop(sender); |
| /// |
| /// poll.poll(&mut events, None)?; |
| /// |
| /// for event in events.iter() { |
| /// match event.token() { |
| /// PIPE_RECV if event.is_read_closed() => { |
| /// // Detected that the sender was dropped. |
| /// println!("Sender dropped!"); |
| /// return Ok(()); |
| /// }, |
| /// _ => unreachable!(), |
| /// } |
| /// } |
| /// # unreachable!(); |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>new() -> io::Result<(Sender, Receiver)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>fds: [RawFd; <span class="number">2</span>] = [-<span class="number">1</span>, -<span class="number">1</span>]; |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"redox"</span>, |
| ))] |
| </span><span class="kw">unsafe </span>{ |
| <span class="kw">if </span>libc::pipe2(fds.as_mut_ptr(), libc::O_CLOEXEC | libc::O_NONBLOCK) != <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(io::Error::last_os_error()); |
| } |
| } |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"tvos"</span>, |
| target_os = <span class="string">"watchos"</span>, |
| ))] |
| </span><span class="kw">unsafe </span>{ |
| <span class="comment">// For platforms that don't have `pipe2(2)` we need to manually set the |
| // correct flags on the file descriptor. |
| </span><span class="kw">if </span>libc::pipe(fds.as_mut_ptr()) != <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(io::Error::last_os_error()); |
| } |
| |
| <span class="kw">for </span>fd <span class="kw">in </span><span class="kw-2">&</span>fds { |
| <span class="kw">if </span>libc::fcntl(<span class="kw-2">*</span>fd, libc::F_SETFL, libc::O_NONBLOCK) != <span class="number">0 |
| </span>|| libc::fcntl(<span class="kw-2">*</span>fd, libc::F_SETFD, libc::FD_CLOEXEC) != <span class="number">0 |
| </span>{ |
| <span class="kw">let </span>err = io::Error::last_os_error(); |
| <span class="comment">// Don't leak file descriptors. Can't handle closing error though. |
| </span><span class="kw">let _ </span>= libc::close(fds[<span class="number">0</span>]); |
| <span class="kw">let _ </span>= libc::close(fds[<span class="number">1</span>]); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(err); |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"tvos"</span>, |
| target_os = <span class="string">"watchos"</span>, |
| )))] |
| </span><span class="macro">compile_error!</span>(<span class="string">"unsupported target for `mio::unix::pipe`"</span>); |
| |
| <span class="comment">// SAFETY: we just initialised the `fds` above. |
| </span><span class="kw">let </span>r = <span class="kw">unsafe </span>{ Receiver::from_raw_fd(fds[<span class="number">0</span>]) }; |
| <span class="kw">let </span>w = <span class="kw">unsafe </span>{ Sender::from_raw_fd(fds[<span class="number">1</span>]) }; |
| |
| <span class="prelude-val">Ok</span>((w, r)) |
| } |
| |
| <span class="doccomment">/// Sending end of an Unix pipe. |
| /// |
| /// See [`new`] for documentation, including examples. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>Sender { |
| inner: IoSource<File>, |
| } |
| |
| <span class="kw">impl </span>Sender { |
| <span class="doccomment">/// Set the `Sender` into or out of non-blocking mode. |
| </span><span class="kw">pub fn </span>set_nonblocking(<span class="kw-2">&</span><span class="self">self</span>, nonblocking: bool) -> io::Result<()> { |
| set_nonblocking(<span class="self">self</span>.inner.as_raw_fd(), nonblocking) |
| } |
| |
| <span class="doccomment">/// Execute an I/O operation ensuring that the socket receives more events |
| /// if it hits a [`WouldBlock`] error. |
| /// |
| /// # Notes |
| /// |
| /// This method is required to be called for **all** I/O operations to |
| /// ensure the user will receive events once the socket is ready again after |
| /// returning a [`WouldBlock`] error. |
| /// |
| /// [`WouldBlock`]: io::ErrorKind::WouldBlock |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// # use std::error::Error; |
| /// # |
| /// # fn main() -> Result<(), Box<dyn Error>> { |
| /// use std::io; |
| /// use std::os::unix::io::AsRawFd; |
| /// use mio::unix::pipe; |
| /// |
| /// let (sender, receiver) = pipe::new()?; |
| /// |
| /// // Wait until the sender is writable... |
| /// |
| /// // Write to the sender using a direct libc call, of course the |
| /// // `io::Write` implementation would be easier to use. |
| /// let buf = b"hello"; |
| /// let n = sender.try_io(|| { |
| /// let buf_ptr = &buf as *const _ as *const _; |
| /// let res = unsafe { libc::write(sender.as_raw_fd(), buf_ptr, buf.len()) }; |
| /// if res != -1 { |
| /// Ok(res as usize) |
| /// } else { |
| /// // If EAGAIN or EWOULDBLOCK is set by libc::write, the closure |
| /// // should return `WouldBlock` error. |
| /// Err(io::Error::last_os_error()) |
| /// } |
| /// })?; |
| /// eprintln!("write {} bytes", n); |
| /// |
| /// // Wait until the receiver is readable... |
| /// |
| /// // Read from the receiver using a direct libc call, of course the |
| /// // `io::Read` implementation would be easier to use. |
| /// let mut buf = [0; 512]; |
| /// let n = receiver.try_io(|| { |
| /// let buf_ptr = &mut buf as *mut _ as *mut _; |
| /// let res = unsafe { libc::read(receiver.as_raw_fd(), buf_ptr, buf.len()) }; |
| /// if res != -1 { |
| /// Ok(res as usize) |
| /// } else { |
| /// // If EAGAIN or EWOULDBLOCK is set by libc::read, the closure |
| /// // should return `WouldBlock` error. |
| /// Err(io::Error::last_os_error()) |
| /// } |
| /// })?; |
| /// eprintln!("read {} bytes", n); |
| /// # Ok(()) |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>try_io<F, T>(<span class="kw-2">&</span><span class="self">self</span>, f: F) -> io::Result<T> |
| <span class="kw">where |
| </span>F: FnOnce() -> io::Result<T>, |
| { |
| <span class="self">self</span>.inner.do_io(|<span class="kw">_</span>| f()) |
| } |
| } |
| |
| <span class="kw">impl </span>event::Source <span class="kw">for </span>Sender { |
| <span class="kw">fn </span>register( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| registry: <span class="kw-2">&</span>Registry, |
| token: Token, |
| interests: Interest, |
| ) -> io::Result<()> { |
| <span class="self">self</span>.inner.register(registry, token, interests) |
| } |
| |
| <span class="kw">fn </span>reregister( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| registry: <span class="kw-2">&</span>Registry, |
| token: Token, |
| interests: Interest, |
| ) -> io::Result<()> { |
| <span class="self">self</span>.inner.reregister(registry, token, interests) |
| } |
| |
| <span class="kw">fn </span>deregister(<span class="kw-2">&mut </span><span class="self">self</span>, registry: <span class="kw-2">&</span>Registry) -> io::Result<()> { |
| <span class="self">self</span>.inner.deregister(registry) |
| } |
| } |
| |
| <span class="kw">impl </span>Write <span class="kw">for </span>Sender { |
| <span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.write(buf)) |
| } |
| |
| <span class="kw">fn </span>write_vectored(<span class="kw-2">&mut </span><span class="self">self</span>, bufs: <span class="kw-2">&</span>[IoSlice<<span class="lifetime">'_</span>>]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.write_vectored(bufs)) |
| } |
| |
| <span class="kw">fn </span>flush(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<()> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.flush()) |
| } |
| } |
| |
| <span class="kw">impl </span>Write <span class="kw">for </span><span class="kw-2">&</span>Sender { |
| <span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.write(buf)) |
| } |
| |
| <span class="kw">fn </span>write_vectored(<span class="kw-2">&mut </span><span class="self">self</span>, bufs: <span class="kw-2">&</span>[IoSlice<<span class="lifetime">'_</span>>]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.write_vectored(bufs)) |
| } |
| |
| <span class="kw">fn </span>flush(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<()> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.flush()) |
| } |
| } |
| |
| <span class="doccomment">/// # Notes |
| /// |
| /// The underlying pipe is **not** set to non-blocking. |
| </span><span class="kw">impl </span>From<ChildStdin> <span class="kw">for </span>Sender { |
| <span class="kw">fn </span>from(stdin: ChildStdin) -> Sender { |
| <span class="comment">// Safety: `ChildStdin` is guaranteed to be a valid file descriptor. |
| </span><span class="kw">unsafe </span>{ Sender::from_raw_fd(stdin.into_raw_fd()) } |
| } |
| } |
| |
| <span class="kw">impl </span>FromRawFd <span class="kw">for </span>Sender { |
| <span class="kw">unsafe fn </span>from_raw_fd(fd: RawFd) -> Sender { |
| Sender { |
| inner: IoSource::new(File::from_raw_fd(fd)), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>AsRawFd <span class="kw">for </span>Sender { |
| <span class="kw">fn </span>as_raw_fd(<span class="kw-2">&</span><span class="self">self</span>) -> RawFd { |
| <span class="self">self</span>.inner.as_raw_fd() |
| } |
| } |
| |
| <span class="kw">impl </span>IntoRawFd <span class="kw">for </span>Sender { |
| <span class="kw">fn </span>into_raw_fd(<span class="self">self</span>) -> RawFd { |
| <span class="self">self</span>.inner.into_inner().into_raw_fd() |
| } |
| } |
| |
| <span class="doccomment">/// Receiving end of an Unix pipe. |
| /// |
| /// See [`new`] for documentation, including examples. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>Receiver { |
| inner: IoSource<File>, |
| } |
| |
| <span class="kw">impl </span>Receiver { |
| <span class="doccomment">/// Set the `Receiver` into or out of non-blocking mode. |
| </span><span class="kw">pub fn </span>set_nonblocking(<span class="kw-2">&</span><span class="self">self</span>, nonblocking: bool) -> io::Result<()> { |
| set_nonblocking(<span class="self">self</span>.inner.as_raw_fd(), nonblocking) |
| } |
| |
| <span class="doccomment">/// Execute an I/O operation ensuring that the socket receives more events |
| /// if it hits a [`WouldBlock`] error. |
| /// |
| /// # Notes |
| /// |
| /// This method is required to be called for **all** I/O operations to |
| /// ensure the user will receive events once the socket is ready again after |
| /// returning a [`WouldBlock`] error. |
| /// |
| /// [`WouldBlock`]: io::ErrorKind::WouldBlock |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// # use std::error::Error; |
| /// # |
| /// # fn main() -> Result<(), Box<dyn Error>> { |
| /// use std::io; |
| /// use std::os::unix::io::AsRawFd; |
| /// use mio::unix::pipe; |
| /// |
| /// let (sender, receiver) = pipe::new()?; |
| /// |
| /// // Wait until the sender is writable... |
| /// |
| /// // Write to the sender using a direct libc call, of course the |
| /// // `io::Write` implementation would be easier to use. |
| /// let buf = b"hello"; |
| /// let n = sender.try_io(|| { |
| /// let buf_ptr = &buf as *const _ as *const _; |
| /// let res = unsafe { libc::write(sender.as_raw_fd(), buf_ptr, buf.len()) }; |
| /// if res != -1 { |
| /// Ok(res as usize) |
| /// } else { |
| /// // If EAGAIN or EWOULDBLOCK is set by libc::write, the closure |
| /// // should return `WouldBlock` error. |
| /// Err(io::Error::last_os_error()) |
| /// } |
| /// })?; |
| /// eprintln!("write {} bytes", n); |
| /// |
| /// // Wait until the receiver is readable... |
| /// |
| /// // Read from the receiver using a direct libc call, of course the |
| /// // `io::Read` implementation would be easier to use. |
| /// let mut buf = [0; 512]; |
| /// let n = receiver.try_io(|| { |
| /// let buf_ptr = &mut buf as *mut _ as *mut _; |
| /// let res = unsafe { libc::read(receiver.as_raw_fd(), buf_ptr, buf.len()) }; |
| /// if res != -1 { |
| /// Ok(res as usize) |
| /// } else { |
| /// // If EAGAIN or EWOULDBLOCK is set by libc::read, the closure |
| /// // should return `WouldBlock` error. |
| /// Err(io::Error::last_os_error()) |
| /// } |
| /// })?; |
| /// eprintln!("read {} bytes", n); |
| /// # Ok(()) |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>try_io<F, T>(<span class="kw-2">&</span><span class="self">self</span>, f: F) -> io::Result<T> |
| <span class="kw">where |
| </span>F: FnOnce() -> io::Result<T>, |
| { |
| <span class="self">self</span>.inner.do_io(|<span class="kw">_</span>| f()) |
| } |
| } |
| |
| <span class="kw">impl </span>event::Source <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>register( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| registry: <span class="kw-2">&</span>Registry, |
| token: Token, |
| interests: Interest, |
| ) -> io::Result<()> { |
| <span class="self">self</span>.inner.register(registry, token, interests) |
| } |
| |
| <span class="kw">fn </span>reregister( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| registry: <span class="kw-2">&</span>Registry, |
| token: Token, |
| interests: Interest, |
| ) -> io::Result<()> { |
| <span class="self">self</span>.inner.reregister(registry, token, interests) |
| } |
| |
| <span class="kw">fn </span>deregister(<span class="kw-2">&mut </span><span class="self">self</span>, registry: <span class="kw-2">&</span>Registry) -> io::Result<()> { |
| <span class="self">self</span>.inner.deregister(registry) |
| } |
| } |
| |
| <span class="kw">impl </span>Read <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>read(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.read(buf)) |
| } |
| |
| <span class="kw">fn </span>read_vectored(<span class="kw-2">&mut </span><span class="self">self</span>, bufs: <span class="kw-2">&mut </span>[IoSliceMut<<span class="lifetime">'_</span>>]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.read_vectored(bufs)) |
| } |
| } |
| |
| <span class="kw">impl </span>Read <span class="kw">for </span><span class="kw-2">&</span>Receiver { |
| <span class="kw">fn </span>read(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.read(buf)) |
| } |
| |
| <span class="kw">fn </span>read_vectored(<span class="kw-2">&mut </span><span class="self">self</span>, bufs: <span class="kw-2">&mut </span>[IoSliceMut<<span class="lifetime">'_</span>>]) -> io::Result<usize> { |
| <span class="self">self</span>.inner.do_io(|<span class="kw-2">mut </span>sender| sender.read_vectored(bufs)) |
| } |
| } |
| |
| <span class="doccomment">/// # Notes |
| /// |
| /// The underlying pipe is **not** set to non-blocking. |
| </span><span class="kw">impl </span>From<ChildStdout> <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>from(stdout: ChildStdout) -> Receiver { |
| <span class="comment">// Safety: `ChildStdout` is guaranteed to be a valid file descriptor. |
| </span><span class="kw">unsafe </span>{ Receiver::from_raw_fd(stdout.into_raw_fd()) } |
| } |
| } |
| |
| <span class="doccomment">/// # Notes |
| /// |
| /// The underlying pipe is **not** set to non-blocking. |
| </span><span class="kw">impl </span>From<ChildStderr> <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>from(stderr: ChildStderr) -> Receiver { |
| <span class="comment">// Safety: `ChildStderr` is guaranteed to be a valid file descriptor. |
| </span><span class="kw">unsafe </span>{ Receiver::from_raw_fd(stderr.into_raw_fd()) } |
| } |
| } |
| |
| <span class="kw">impl </span>FromRawFd <span class="kw">for </span>Receiver { |
| <span class="kw">unsafe fn </span>from_raw_fd(fd: RawFd) -> Receiver { |
| Receiver { |
| inner: IoSource::new(File::from_raw_fd(fd)), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>AsRawFd <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>as_raw_fd(<span class="kw-2">&</span><span class="self">self</span>) -> RawFd { |
| <span class="self">self</span>.inner.as_raw_fd() |
| } |
| } |
| |
| <span class="kw">impl </span>IntoRawFd <span class="kw">for </span>Receiver { |
| <span class="kw">fn </span>into_raw_fd(<span class="self">self</span>) -> RawFd { |
| <span class="self">self</span>.inner.into_inner().into_raw_fd() |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"illumos"</span>))] |
| </span><span class="kw">fn </span>set_nonblocking(fd: RawFd, nonblocking: bool) -> io::Result<()> { |
| <span class="kw">let </span>value = nonblocking <span class="kw">as </span>libc::c_int; |
| <span class="kw">if unsafe </span>{ libc::ioctl(fd, libc::FIONBIO, <span class="kw-2">&</span>value) } == -<span class="number">1 </span>{ |
| <span class="prelude-val">Err</span>(io::Error::last_os_error()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="attribute">#[cfg(target_os = <span class="string">"illumos"</span>)] |
| </span><span class="kw">fn </span>set_nonblocking(fd: RawFd, nonblocking: bool) -> io::Result<()> { |
| <span class="kw">let </span>flags = <span class="kw">unsafe </span>{ libc::fcntl(fd, libc::F_GETFL) }; |
| <span class="kw">if </span>flags < <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(io::Error::last_os_error()); |
| } |
| |
| <span class="kw">let </span>nflags = <span class="kw">if </span>nonblocking { |
| flags | libc::O_NONBLOCK |
| } <span class="kw">else </span>{ |
| flags & !libc::O_NONBLOCK |
| }; |
| |
| <span class="kw">if </span>flags != nflags { |
| <span class="kw">if unsafe </span>{ libc::fcntl(fd, libc::F_SETFL, nflags) } < <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(io::Error::last_os_error()); |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="mio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
