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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="A wrapper around `mpsc::Sender` that can be polled."><title>PollSender in tokio_util::sync - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="tokio_util" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">PollSender</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../tokio_util/index.html">tokio_<wbr>util</a><span class="version">0.7.18</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Poll<wbr>Sender</a></h2><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.abort_send" title="abort_send">abort_send</a></li><li><a href="#method.close" title="close">close</a></li><li><a href="#method.get_ref" title="get_ref">get_ref</a></li><li><a href="#method.is_closed" title="is_closed">is_closed</a></li><li><a href="#method.new" title="new">new</a></li><li><a href="#method.poll_reserve" title="poll_reserve">poll_reserve</a></li><li><a href="#method.send_item" title="send_item">send_item</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-PollSender%3CT%3E" title="Clone">Clone</a></li><li><a href="#impl-Debug-for-PollSender%3CT%3E" title="Debug">Debug</a></li><li><a href="#impl-Sink%3CT%3E-for-PollSender%3CT%3E" title="Sink&#60;T&#62;">Sink&#60;T&#62;</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-PollSender%3CT%3E" title="!RefUnwindSafe">!RefUnwindSafe</a></li><li><a href="#impl-UnwindSafe-for-PollSender%3CT%3E" title="!UnwindSafe">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-PollSender%3CT%3E" title="Freeze">Freeze</a></li><li><a href="#impl-Send-for-PollSender%3CT%3E" title="Send">Send</a></li><li><a href="#impl-Sync-for-PollSender%3CT%3E" title="Sync">Sync</a></li><li><a href="#impl-Unpin-for-PollSender%3CT%3E" title="Unpin">Unpin</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T" title="Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T" title="Borrow&#60;T&#62;">Borrow&#60;T&#62;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut&#60;T&#62;">BorrowMut&#60;T&#62;</a></li><li><a href="#impl-CloneToUninit-for-T" title="CloneToUninit">CloneToUninit</a></li><li><a href="#impl-From%3CT%3E-for-T" title="From&#60;T&#62;">From&#60;T&#62;</a></li><li><a href="#impl-Into%3CU%3E-for-T" title="Into&#60;U&#62;">Into&#60;U&#62;</a></li><li><a href="#impl-ToOwned-for-T" title="ToOwned">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T" title="TryFrom&#60;U&#62;">TryFrom&#60;U&#62;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T" title="TryInto&#60;U&#62;">TryInto&#60;U&#62;</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In tokio_<wbr>util::<wbr>sync</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">tokio_util</a>::<wbr><a href="index.html">sync</a></div><h1>Struct <span class="struct">Poll<wbr>Sender</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/tokio_util/sync/mpsc.rs.html#44-48">Source</a> </span></div><pre class="rust item-decl"><code>pub struct PollSender&lt;T&gt; { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A wrapper around <a href="../../tokio/sync/mpsc/bounded/struct.Sender.html" title="struct tokio::sync::mpsc::bounded::Sender"><code>mpsc::Sender</code></a> that can be polled.</p>
</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-PollSender%3CT%3E" class="impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#110-286">Source</a><a href="#impl-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>&gt; <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#112-118">Source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>(sender: <a class="struct" href="../../tokio/sync/mpsc/bounded/struct.Sender.html" title="struct tokio::sync::mpsc::bounded::Sender">Sender</a>&lt;T&gt;) -&gt; Self</h4></section></summary><div class="docblock"><p>Creates a new <code>PollSender</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.poll_reserve" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#137-167">Source</a><h4 class="code-header">pub fn <a href="#method.poll_reserve" class="fn">poll_reserve</a>(
&amp;mut self,
cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.PollSendError.html" title="struct tokio_util::sync::PollSendError">PollSendError</a>&lt;T&gt;&gt;&gt;</h4></section></summary><div class="docblock"><p>Attempts to prepare the sender to receive a value.</p>
<p>This method must be called and return <code>Poll::Ready(Ok(()))</code> prior to each call to
<code>send_item</code>.</p>
<p>This method returns <code>Poll::Ready</code> once the underlying channel is ready to receive a value,
by reserving a slot in the channel for the item to be sent. If this method returns
<code>Poll::Pending</code>, the current task is registered to be notified (via
<code>cx.waker().wake_by_ref()</code>) when <code>poll_reserve</code> should be called again.</p>
<h5 id="errors"><a class="doc-anchor" href="#errors">§</a>Errors</h5>
<p>If the channel is closed, an error will be returned. This is a permanent state.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.send_item" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#183-201">Source</a><h4 class="code-header">pub fn <a href="#method.send_item" class="fn">send_item</a>(&amp;mut self, value: T) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, <a class="struct" href="struct.PollSendError.html" title="struct tokio_util::sync::PollSendError">PollSendError</a>&lt;T&gt;&gt;</h4></section></summary><div class="docblock"><p>Sends an item to the channel.</p>
<p>Before calling <code>send_item</code>, <code>poll_reserve</code> must be called with a successful return
value of <code>Poll::Ready(Ok(()))</code>.</p>
<h5 id="errors-1"><a class="doc-anchor" href="#errors-1">§</a>Errors</h5>
<p>If the channel is closed, an error will be returned. This is a permanent state.</p>
<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
<p>If <code>poll_reserve</code> was not successfully called prior to calling <code>send_item</code>, then this method
will panic.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_closed" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#206-208">Source</a><h4 class="code-header">pub fn <a href="#method.is_closed" class="fn">is_closed</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks whether this sender is closed.</p>
<p>The underlying channel that this sender was wrapping may still be open.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.get_ref" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#214-216">Source</a><h4 class="code-header">pub fn <a href="#method.get_ref" class="fn">get_ref</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;<a class="struct" href="../../tokio/sync/mpsc/bounded/struct.Sender.html" title="struct tokio::sync::mpsc::bounded::Sender">Sender</a>&lt;T&gt;&gt;</h4></section></summary><div class="docblock"><p>Gets a reference to the <code>Sender</code> of the underlying channel.</p>
<p>If <code>PollSender</code> has been closed, <code>None</code> is returned. The underlying channel that this sender
was wrapping may still be open.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.close" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#230-245">Source</a><h4 class="code-header">pub fn <a href="#method.close" class="fn">close</a>(&amp;mut self)</h4></section></summary><div class="docblock"><p>Closes this sender.</p>
<p>No more messages will be able to be sent from this sender, but the underlying channel will
remain open until all senders have dropped, or until the <a href="../../tokio/sync/mpsc/bounded/struct.Receiver.html" title="struct tokio::sync::mpsc::bounded::Receiver"><code>Receiver</code></a> closes the channel.</p>
<p>If a slot was previously reserved by calling <code>poll_reserve</code>, then a final call can be made
to <code>send_item</code> in order to consume the reserved slot. After that, no further sends will be
possible. If you do not intend to send another item, you can release the reserved slot back
to the underlying sender by calling <a href="struct.PollSender.html#method.abort_send" title="method tokio_util::sync::PollSender::abort_send"><code>abort_send</code></a>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.abort_send" class="method"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#252-285">Source</a><h4 class="code-header">pub fn <a href="#method.abort_send" class="fn">abort_send</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Aborts the current in-progress send, if any.</p>
<p>Returns <code>true</code> if a send was aborted. If the sender was closed prior to calling
<code>abort_send</code>, then the sender will remain in the closed state, otherwise the sender will be
ready to attempt another send.</p>
</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-PollSender%3CT%3E" class="impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#288-304">Source</a><a href="#impl-Clone-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#292-303">Source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h4></section></summary><div class="docblock"><p>Clones this <code>PollSender</code>.</p>
<p>The resulting <code>PollSender</code> will have an initial state identical to calling <code>PollSender::new</code>.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.93.1/src/core/clone.rs.html#245-247">Source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: &amp;Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-PollSender%3CT%3E" class="impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#43">Source</a><a href="#impl-Debug-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#43">Source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.93.1/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.93.1/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Sink%3CT%3E-for-PollSender%3CT%3E" class="impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#306-325">Source</a><a href="#impl-Sink%3CT%3E-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>&gt; <a class="trait" href="../../futures_sink/trait.Sink.html" title="trait futures_sink::Sink">Sink</a>&lt;T&gt; for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#307">Source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="../../futures_sink/trait.Sink.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="struct" href="struct.PollSendError.html" title="struct tokio_util::sync::PollSendError">PollSendError</a>&lt;T&gt;</h4></section></summary><div class='docblock'>The type of value produced by the sink when an error occurs.</div></details><details class="toggle method-toggle" open><summary><section id="method.poll_ready" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#309-311">Source</a><a href="#method.poll_ready" class="anchor">§</a><h4 class="code-header">fn <a href="../../futures_sink/trait.Sink.html#tymethod.poll_ready" class="fn">poll_ready</a>(
self: <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;&amp;mut Self&gt;,
cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="../../futures_sink/trait.Sink.html#associatedtype.Error" title="type futures_sink::Sink::Error">Error</a>&gt;&gt;</h4></section></summary><div class='docblock'>Attempts to prepare the <code>Sink</code> to receive a value. <a href="../../futures_sink/trait.Sink.html#tymethod.poll_ready">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.poll_flush" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#313-315">Source</a><a href="#method.poll_flush" class="anchor">§</a><h4 class="code-header">fn <a href="../../futures_sink/trait.Sink.html#tymethod.poll_flush" class="fn">poll_flush</a>(
self: <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;&amp;mut Self&gt;,
_cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="../../futures_sink/trait.Sink.html#associatedtype.Error" title="type futures_sink::Sink::Error">Error</a>&gt;&gt;</h4></section></summary><div class='docblock'>Flush any remaining output from this sink. <a href="../../futures_sink/trait.Sink.html#tymethod.poll_flush">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.start_send" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#317-319">Source</a><a href="#method.start_send" class="anchor">§</a><h4 class="code-header">fn <a href="../../futures_sink/trait.Sink.html#tymethod.start_send" class="fn">start_send</a>(self: <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;&amp;mut Self&gt;, item: T) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="../../futures_sink/trait.Sink.html#associatedtype.Error" title="type futures_sink::Sink::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Begin the process of sending a value to the sink.
Each call to this function must be preceded by a successful call to
<code>poll_ready</code> which returned <code>Poll::Ready(Ok(()))</code>. <a href="../../futures_sink/trait.Sink.html#tymethod.start_send">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.poll_close" class="method trait-impl"><a class="src rightside" href="../../src/tokio_util/sync/mpsc.rs.html#321-324">Source</a><a href="#method.poll_close" class="anchor">§</a><h4 class="code-header">fn <a href="../../futures_sink/trait.Sink.html#tymethod.poll_close" class="fn">poll_close</a>(
self: <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a>&lt;&amp;mut Self&gt;,
_cx: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/task/wake/struct.Context.html" title="struct core::task::wake::Context">Context</a>&lt;'_&gt;,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/task/poll/enum.Poll.html" title="enum core::task::poll::Poll">Poll</a>&lt;<a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.unit.html">()</a>, Self::<a class="associatedtype" href="../../futures_sink/trait.Sink.html#associatedtype.Error" title="type futures_sink::Sink::Error">Error</a>&gt;&gt;</h4></section></summary><div class='docblock'>Flush any remaining output and close this sink, if necessary. <a href="../../futures_sink/trait.Sink.html#tymethod.poll_close">Read more</a></div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-PollSender%3CT%3E" class="impl"><a href="#impl-Freeze-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section><section id="impl-RefUnwindSafe-for-PollSender%3CT%3E" class="impl"><a href="#impl-RefUnwindSafe-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; !<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section><section id="impl-Send-for-PollSender%3CT%3E" class="impl"><a href="#impl-Send-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Sync-for-PollSender%3CT%3E" class="impl"><a href="#impl-Sync-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</div></h3></section><section id="impl-Unpin-for-PollSender%3CT%3E" class="impl"><a href="#impl-Unpin-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section><section id="impl-UnwindSafe-for-PollSender%3CT%3E" class="impl"><a href="#impl-UnwindSafe-for-PollSender%3CT%3E" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; !<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.PollSender.html" title="struct tokio_util::sync::PollSender">PollSender</a>&lt;T&gt;</h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/any.rs.html#138">Source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/any.rs.html#139">Source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.93.1/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.93.1/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/borrow.rs.html#212">Source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/borrow.rs.html#214">Source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/borrow.rs.html#221">Source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/borrow.rs.html#222">Source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.93.1/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-CloneToUninit-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/clone.rs.html#547">Source</a><a href="#impl-CloneToUninit-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/clone/trait.CloneToUninit.html" title="trait core::clone::CloneToUninit">CloneToUninit</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone_to_uninit" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/clone.rs.html#549">Source</a><a href="#method.clone_to_uninit" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="https://doc.rust-lang.org/1.93.1/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit" class="fn">clone_to_uninit</a>(&amp;self, dest: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.pointer.html">*mut </a><a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>clone_to_uninit</code>)</span></div></span><div class='docblock'>Performs copy-assignment from <code>self</code> to <code>dest</code>. <a href="https://doc.rust-lang.org/1.93.1/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#785">Source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#788">Source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#767-769">Source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#777">Source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/alloc/borrow.rs.html#85-87">Source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/alloc/borrow.rs.html#89">Source</a><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/alloc/borrow.rs.html#90">Source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&amp;self) -&gt; T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/alloc/borrow.rs.html#94">Source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.reference.html">&amp;mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.93.1/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#827-829">Source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-2" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#831">Source</a><a href="#associatedtype.Error-2" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#834">Source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#811-813">Source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#815">Source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.93.1/src/core/convert/mod.rs.html#818">Source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.93.1/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.93.1/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>