| <!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/futures-util-0.3.28/src/io/split.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>split.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="../../../futures_util/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="../../../futures_util/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="kw">use </span><span class="kw">crate</span>::lock::BiLock; |
| <span class="kw">use </span>core::fmt; |
| <span class="kw">use </span>futures_core::ready; |
| <span class="kw">use </span>futures_core::task::{Context, Poll}; |
| <span class="kw">use </span>futures_io::{AsyncRead, AsyncWrite, IoSlice, IoSliceMut}; |
| <span class="kw">use </span>std::io; |
| <span class="kw">use </span>std::pin::Pin; |
| |
| <span class="doccomment">/// The readable half of an object returned from `AsyncRead::split`. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>ReadHalf<T> { |
| handle: BiLock<T>, |
| } |
| |
| <span class="doccomment">/// The writable half of an object returned from `AsyncRead::split`. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>WriteHalf<T> { |
| handle: BiLock<T>, |
| } |
| |
| <span class="kw">fn </span>lock_and_then<T, U, E, F>(lock: <span class="kw-2">&</span>BiLock<T>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, f: F) -> Poll<<span class="prelude-ty">Result</span><U, E>> |
| <span class="kw">where |
| </span>F: FnOnce(Pin<<span class="kw-2">&mut </span>T>, <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><U, E>>, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>l = <span class="macro">ready!</span>(lock.poll_lock(cx)); |
| f(l.as_pin_mut(), cx) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>split<T: AsyncRead + AsyncWrite>(t: T) -> (ReadHalf<T>, WriteHalf<T>) { |
| <span class="kw">let </span>(a, b) = BiLock::new(t); |
| (ReadHalf { handle: a }, WriteHalf { handle: b }) |
| } |
| |
| <span class="kw">impl</span><T: Unpin> ReadHalf<T> { |
| <span class="doccomment">/// Attempts to put the two "halves" of a split `AsyncRead + AsyncWrite` back |
| /// together. Succeeds only if the `ReadHalf<T>` and `WriteHalf<T>` are |
| /// a matching pair originating from the same call to `AsyncReadExt::split`. |
| </span><span class="kw">pub fn </span>reunite(<span class="self">self</span>, other: WriteHalf<T>) -> <span class="prelude-ty">Result</span><T, ReuniteError<T>> { |
| <span class="self">self</span>.handle |
| .reunite(other.handle) |
| .map_err(|err| ReuniteError(ReadHalf { handle: err.<span class="number">0 </span>}, WriteHalf { handle: err.<span class="number">1 </span>})) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Unpin> WriteHalf<T> { |
| <span class="doccomment">/// Attempts to put the two "halves" of a split `AsyncRead + AsyncWrite` back |
| /// together. Succeeds only if the `ReadHalf<T>` and `WriteHalf<T>` are |
| /// a matching pair originating from the same call to `AsyncReadExt::split`. |
| </span><span class="kw">pub fn </span>reunite(<span class="self">self</span>, other: ReadHalf<T>) -> <span class="prelude-ty">Result</span><T, ReuniteError<T>> { |
| other.reunite(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><R: AsyncRead> AsyncRead <span class="kw">for </span>ReadHalf<R> { |
| <span class="kw">fn </span>poll_read( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| buf: <span class="kw-2">&mut </span>[u8], |
| ) -> Poll<io::Result<usize>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_read(cx, buf)) |
| } |
| |
| <span class="kw">fn </span>poll_read_vectored( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| bufs: <span class="kw-2">&mut </span>[IoSliceMut<<span class="lifetime">'_</span>>], |
| ) -> Poll<io::Result<usize>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_read_vectored(cx, bufs)) |
| } |
| } |
| |
| <span class="kw">impl</span><W: AsyncWrite> AsyncWrite <span class="kw">for </span>WriteHalf<W> { |
| <span class="kw">fn </span>poll_write( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| buf: <span class="kw-2">&</span>[u8], |
| ) -> Poll<io::Result<usize>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_write(cx, buf)) |
| } |
| |
| <span class="kw">fn </span>poll_write_vectored( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| bufs: <span class="kw-2">&</span>[IoSlice<<span class="lifetime">'_</span>>], |
| ) -> Poll<io::Result<usize>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_write_vectored(cx, bufs)) |
| } |
| |
| <span class="kw">fn </span>poll_flush(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<io::Result<()>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_flush(cx)) |
| } |
| |
| <span class="kw">fn </span>poll_close(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<io::Result<()>> { |
| lock_and_then(<span class="kw-2">&</span><span class="self">self</span>.handle, cx, |l, cx| l.poll_close(cx)) |
| } |
| } |
| |
| <span class="doccomment">/// Error indicating a `ReadHalf<T>` and `WriteHalf<T>` were not two halves |
| /// of a `AsyncRead + AsyncWrite`, and thus could not be `reunite`d. |
| </span><span class="kw">pub struct </span>ReuniteError<T>(<span class="kw">pub </span>ReadHalf<T>, <span class="kw">pub </span>WriteHalf<T>); |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>ReuniteError<T> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_tuple(<span class="string">"ReuniteError"</span>).field(<span class="kw-2">&</span><span class="string">"..."</span>).finish() |
| } |
| } |
| |
| <span class="kw">impl</span><T> fmt::Display <span class="kw">for </span>ReuniteError<T> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"tried to reunite a ReadHalf and WriteHalf that don't form a pair"</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">impl</span><T: core::any::Any> std::error::Error <span class="kw">for </span>ReuniteError<T> {} |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="futures_util" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
