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<!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="API documentation for the Rust `AsyncRead` trait in crate `tokio`."><meta name="keywords" content="rust, rustlang, rust-lang, AsyncRead"><title>tokio::io::AsyncRead - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../tokio/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Trait AsyncRead</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.poll_read">poll_read</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-AsyncRead-for-%26%27_%20%5Bu8%5D">&amp;&#39;_ [u8]</a><a href="#impl-AsyncRead-for-%26%27_%20mut%20T">&amp;&#39;_ mut T</a><a href="#impl-AsyncRead-for-Box%3CT%3E">Box&lt;T&gt;</a><a href="#impl-AsyncRead-for-Cursor%3CT%3E">Cursor&lt;T&gt;</a><a href="#impl-AsyncRead-for-Pin%3CP%3E">Pin&lt;P&gt;</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class="location"><a href="../index.html">tokio</a>::<wbr><a href="index.html">io</a></p><script>window.sidebarCurrent = {name: "AsyncRead", ty: "trait", relpath: ""};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"></div><span class="help-button">?</span>
<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span><a class="srclink" href="../../src/tokio/io/async_read.rs.html#43-58" title="goto source code">[src]</a></span><span class="in-band">Trait <a href="../index.html">tokio</a>::<wbr><a href="index.html">io</a>::<wbr><a class="trait" href="">AsyncRead</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class="rust trait">pub trait AsyncRead {
fn <a href="#tymethod.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;;
}</pre></div><div class="docblock"><p>Reads bytes from a source.</p>
<p>This trait is analogous to the <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html"><code>std::io::Read</code></a> trait, but integrates with
the asynchronous task system. In particular, the <a href="../../tokio/io/trait.AsyncRead.html#tymethod.poll_read"><code>poll_read</code></a> method,
unlike <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read"><code>Read::read</code></a>, will automatically queue the current task for wakeup
and return if data is not yet available, rather than blocking the calling
thread.</p>
<p>Specifically, this means that the <code>poll_read</code> function will return one of
the following:</p>
<ul>
<li>
<p><code>Poll::Ready(Ok(()))</code> means that data was immediately read and placed into
the output buffer. The amount of data read can be determined by the
increase in the length of the slice returned by <code>ReadBuf::filled</code>. If the
difference is 0, EOF has been reached.</p>
</li>
<li>
<p><code>Poll::Pending</code> means that no data was read into the buffer
provided. The I/O object is not currently readable but may become readable
in the future. Most importantly, <strong>the current future's task is scheduled
to get unparked when the object is readable</strong>. This means that like
<code>Future::poll</code> you'll receive a notification when the I/O object is
readable again.</p>
</li>
<li>
<p><code>Poll::Ready(Err(e))</code> for other errors are standard I/O errors coming from the
underlying object.</p>
</li>
</ul>
<p>This trait importantly means that the <code>read</code> method only works in the
context of a future's task. The object may panic if used outside of a task.</p>
<p>Utilities for working with <code>AsyncRead</code> values are provided by
<a href="crate::io::AsyncReadExt"><code>AsyncReadExt</code></a>.</p>
</div><h2 id="required-methods" class="small-section-header">Required methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><h3 id="tymethod.poll_read" class="method"><code>fn <a href="#tymethod.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code></h3><div class="docblock"><p>Attempts to read from the <code>AsyncRead</code> into <code>buf</code>.</p>
<p>On success, returns <code>Poll::Ready(Ok(()))</code> and fills <code>buf</code> with data
read. If no data was read (<code>buf.filled().is_empty()</code>) it implies that
EOF has been reached.</p>
<p>If no data is available for reading, the method returns <code>Poll::Pending</code>
and arranges for the current task (via <code>cx.waker()</code>) to receive a
notification when the object becomes readable or is closed.</p>
</div></div><span class="loading-content">Loading content...</span><h2 id="foreign-impls" class="small-section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor"></a></h2><h3 id="impl-AsyncRead-for-Box%3CT%3E" class="impl"><code class="in-band">impl&lt;T:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>&gt; <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a>&lt;T&gt;</code><a href="#impl-AsyncRead-for-Box%3CT%3E" class="anchor"></a><a class="srclink" href="../../src/tokio/io/async_read.rs.html#72-74" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read" class="method hidden"><code>fn <a href="#method.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/io/async_read.rs.html#73" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-for-%26%27_%20mut%20T" class="impl"><code class="in-band">impl&lt;T:&nbsp;?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, '_&gt; <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'_ mut </a>T</code><a href="#impl-AsyncRead-for-%26%27_%20mut%20T" class="anchor"></a><a class="srclink" href="../../src/tokio/io/async_read.rs.html#76-78" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-1" class="method hidden"><code>fn <a href="#method.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/io/async_read.rs.html#77" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-for-Pin%3CP%3E" class="impl"><code class="in-band">impl&lt;P&gt; <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;P&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;P::<a class="type" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target" title="type core::ops::deref::Deref::Target">Target</a>: <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a>,&nbsp;</span></code><a href="#impl-AsyncRead-for-Pin%3CP%3E" class="anchor"></a><a class="srclink" href="../../src/tokio/io/async_read.rs.html#80-92" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-2" class="method hidden"><code>fn <a href="#method.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/io/async_read.rs.html#85-91" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-for-%26%27_%20%5Bu8%5D" class="impl"><code class="in-band">impl&lt;'_&gt; <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;'_ [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a></code><a href="#impl-AsyncRead-for-%26%27_%20%5Bu8%5D" class="anchor"></a><a class="srclink" href="../../src/tokio/io/async_read.rs.html#94-106" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-3" class="method hidden"><code>fn <a href="#method.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;_cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/io/async_read.rs.html#95-105" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-for-Cursor%3CT%3E" class="impl"><code class="in-band">impl&lt;T:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>&gt; + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>&gt; <a class="trait" href="../../tokio/io/trait.AsyncRead.html" title="trait tokio::io::AsyncRead">AsyncRead</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/cursor/struct.Cursor.html" title="struct std::io::cursor::Cursor">Cursor</a>&lt;T&gt;</code><a href="#impl-AsyncRead-for-Cursor%3CT%3E" class="anchor"></a><a class="srclink" href="../../src/tokio/io/async_read.rs.html#108-131" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-4" class="method hidden"><code>fn <a href="#method.poll_read" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;_cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/io/async_read.rs.html#109-130" title="goto source code">[src]</a></h4></div><span class="loading-content">Loading content...</span><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><h3 id="impl-AsyncRead" class="impl"><code class="in-band">impl AsyncRead for <a class="struct" href="../../tokio/net/struct.TcpStream.html" title="struct tokio::net::TcpStream">TcpStream</a></code><a href="#impl-AsyncRead" class="anchor"></a><a class="srclink" href="../../src/tokio/net/tcp/stream.rs.html#970-978" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-5" class="method hidden"><code>fn <a href="#method.poll_read-5" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/tcp/stream.rs.html#971-977" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-1" class="impl"><code class="in-band">impl AsyncRead for <a class="struct" href="../../tokio/net/struct.UnixStream.html" title="struct tokio::net::UnixStream">UnixStream</a></code><a href="#impl-AsyncRead-1" class="anchor"></a><a class="srclink" href="../../src/tokio/net/unix/stream.rs.html#515-523" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-6" class="method hidden"><code>fn <a href="#method.poll_read-6" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/unix/stream.rs.html#516-522" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-2" class="impl"><code class="in-band">impl AsyncRead for tokio::net::tcp::<a class="struct" href="../../tokio/net/tcp/struct.OwnedReadHalf.html" title="struct tokio::net::tcp::OwnedReadHalf">OwnedReadHalf</a></code><a href="#impl-AsyncRead-2" class="anchor"></a><a class="srclink" href="../../src/tokio/net/tcp/split_owned.rs.html#194-202" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-7" class="method hidden"><code>fn <a href="#method.poll_read-7" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/tcp/split_owned.rs.html#195-201" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-3" class="impl"><code class="in-band">impl AsyncRead for tokio::net::unix::<a class="struct" href="../../tokio/net/unix/struct.OwnedReadHalf.html" title="struct tokio::net::unix::OwnedReadHalf">OwnedReadHalf</a></code><a href="#impl-AsyncRead-3" class="anchor"></a><a class="srclink" href="../../src/tokio/net/unix/split_owned.rs.html#107-115" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-8" class="method hidden"><code>fn <a href="#method.poll_read-8" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/unix/split_owned.rs.html#108-114" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-4" class="impl"><code class="in-band">impl&lt;'_&gt; AsyncRead for tokio::net::tcp::<a class="struct" href="../../tokio/net/tcp/struct.ReadHalf.html" title="struct tokio::net::tcp::ReadHalf">ReadHalf</a>&lt;'_&gt;</code><a href="#impl-AsyncRead-4" class="anchor"></a><a class="srclink" href="../../src/tokio/net/tcp/split.rs.html#139-147" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-9" class="method hidden"><code>fn <a href="#method.poll_read-9" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/tcp/split.rs.html#140-146" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncRead-5" class="impl"><code class="in-band">impl&lt;'_&gt; AsyncRead for tokio::net::unix::<a class="struct" href="../../tokio/net/unix/struct.ReadHalf.html" title="struct tokio::net::unix::ReadHalf">ReadHalf</a>&lt;'_&gt;</code><a href="#impl-AsyncRead-5" class="anchor"></a><a class="srclink" href="../../src/tokio/net/unix/split.rs.html#50-58" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_read-10" class="method hidden"><code>fn <a href="#method.poll_read-10" class="fnname">poll_read</a>(<br>&nbsp;&nbsp;&nbsp;&nbsp;self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;, <br>&nbsp;&nbsp;&nbsp;&nbsp;buf: &amp;mut <a class="struct" href="../../tokio/io/struct.ReadBuf.html" title="struct tokio::io::ReadBuf">ReadBuf</a>&lt;'_&gt;<br>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;&gt;</code><a class="srclink" href="../../src/tokio/net/unix/split.rs.html#51-57" title="goto source code">[src]</a></h4></div></div><span class="loading-content">Loading content...</span><script type="text/javascript" src="../../implementors/tokio/io/trait.AsyncRead.js" async></script></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../";window.currentCrate = "tokio";</script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html>