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<p class='location'>Struct EventedFd</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Evented">Evented</a></div></div><p class='location'><a href='../index.html'>mio</a>::<wbr><a href='index.html'>unix</a></p><script>window.sidebarCurrent = {name: 'EventedFd', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>mio</a>::<wbr><a href='index.html'>unix</a>::<wbr><a class="struct" href=''>EventedFd</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#92' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct EventedFd<'a>(pub &'a <a class="type" href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/type.RawFd.html" title="type std::sys::unix::ext::io::RawFd">RawFd</a>);</pre><div class='docblock'><p>Adapter for <code>RawFd</code> providing an <a href="../event/trait.Evented.html"><code>Evented</code></a> implementation.</p>
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<p><code>EventedFd</code> enables registering any type with an FD with <a href="../struct.Poll.html"><code>Poll</code></a>.</p>
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<p>While only implementations for TCP and UDP are provided, Mio supports
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registering any FD that can be registered with the underlying OS selector.
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<code>EventedFd</code> provides the necessary bridge.</p>
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<p>Note that <code>EventedFd</code> takes a <code>&RawFd</code>. This is because <code>EventedFd</code> <strong>does
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not</strong> take ownership of the FD. Specifically, it will not manage any
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lifecycle related operations, such as closing the FD on drop. It is expected
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that the <code>EventedFd</code> is constructed right before a call to
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<a href="../struct.Poll.html#method.register"><code>Poll::register</code></a>. See the examples for more detail.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p>Basic usage</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">mio</span>::{<span class="ident">Ready</span>, <span class="ident">Poll</span>, <span class="ident">PollOpt</span>, <span class="ident">Token</span>};
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<span class="kw">use</span> <span class="ident">mio</span>::<span class="ident">unix</span>::<span class="ident">EventedFd</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">AsRawFd</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">net</span>::<span class="ident">TcpListener</span>;
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<span class="comment">// Bind a std listener</span>
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<span class="kw">let</span> <span class="ident">listener</span> <span class="op">=</span> <span class="ident">TcpListener</span>::<span class="ident">bind</span>(<span class="string">"127.0.0.1:0"</span>)<span class="question-mark">?</span>;
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<span class="kw">let</span> <span class="ident">poll</span> <span class="op">=</span> <span class="ident">Poll</span>::<span class="ident">new</span>()<span class="question-mark">?</span>;
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<span class="comment">// Register the listener</span>
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<span class="ident">poll</span>.<span class="ident">register</span>(<span class="kw-2">&</span><span class="ident">EventedFd</span>(<span class="kw-2">&</span><span class="ident">listener</span>.<span class="ident">as_raw_fd</span>()),
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<span class="ident">Token</span>(<span class="number">0</span>), <span class="ident">Ready</span>::<span class="ident">readable</span>(), <span class="ident">PollOpt</span>::<span class="ident">edge</span>())<span class="question-mark">?</span>;</pre>
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<p>Implementing <code>Evented</code> for a custom type backed by a <code>RawFd</code>.</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">mio</span>::{<span class="ident">Ready</span>, <span class="ident">Poll</span>, <span class="ident">PollOpt</span>, <span class="ident">Token</span>};
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<span class="kw">use</span> <span class="ident">mio</span>::<span class="ident">event</span>::<span class="ident">Evented</span>;
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<span class="kw">use</span> <span class="ident">mio</span>::<span class="ident">unix</span>::<span class="ident">EventedFd</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">RawFd</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>;
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MyIo</span> {
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<span class="ident">fd</span>: <span class="ident">RawFd</span>,
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}
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<span class="kw">impl</span> <span class="ident">Evented</span> <span class="kw">for</span> <span class="ident">MyIo</span> {
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<span class="kw">fn</span> <span class="ident">register</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>, <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>)
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<span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span>
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{
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<span class="ident">EventedFd</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fd</span>).<span class="ident">register</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
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}
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<span class="kw">fn</span> <span class="ident">reregister</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&</span><span class="ident">Poll</span>, <span class="ident">token</span>: <span class="ident">Token</span>, <span class="ident">interest</span>: <span class="ident">Ready</span>, <span class="ident">opts</span>: <span class="ident">PollOpt</span>)
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<span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span>
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{
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<span class="ident">EventedFd</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fd</span>).<span class="ident">reregister</span>(<span class="ident">poll</span>, <span class="ident">token</span>, <span class="ident">interest</span>, <span class="ident">opts</span>)
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}
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<span class="kw">fn</span> <span class="ident">deregister</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">poll</span>: <span class="kw-2">&</span><span class="ident">Poll</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> {
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<span class="ident">EventedFd</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fd</span>).<span class="ident">deregister</span>(<span class="ident">poll</span>)
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}
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}</pre>
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</div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../mio/unix/struct.EventedFd.html" title="struct mio::unix::EventedFd">EventedFd</a><'a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#11' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, __arg_0: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#11' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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</div></div><h3 id='impl-Evented' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="../../mio/event/trait.Evented.html" title="trait mio::event::Evented">Evented</a> for <a class="struct" href="../../mio/unix/struct.EventedFd.html" title="struct mio::unix::EventedFd">EventedFd</a><'a></code><a href='#impl-Evented' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#94-106' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.register' class="method"><span id='register.v' class='invisible'><code>fn <a href='../../mio/event/trait.Evented.html#tymethod.register' class='fnname'>register</a>(<br> &self, <br> poll: &<a class="struct" href="../../mio/struct.Poll.html" title="struct mio::Poll">Poll</a>, <br> token: <a class="struct" href="../../mio/struct.Token.html" title="struct mio::Token">Token</a>, <br> interest: <a class="struct" href="../../mio/struct.Ready.html" title="struct mio::Ready">Ready</a>, <br> opts: <a class="struct" href="../../mio/struct.PollOpt.html" title="struct mio::PollOpt">PollOpt</a><br>) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#95-97' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Register <code>self</code> with the given <code>Poll</code> instance. <a href="../../mio/event/trait.Evented.html#tymethod.register">Read more</a></p>
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</div><h4 id='method.reregister' class="method"><span id='reregister.v' class='invisible'><code>fn <a href='../../mio/event/trait.Evented.html#tymethod.reregister' class='fnname'>reregister</a>(<br> &self, <br> poll: &<a class="struct" href="../../mio/struct.Poll.html" title="struct mio::Poll">Poll</a>, <br> token: <a class="struct" href="../../mio/struct.Token.html" title="struct mio::Token">Token</a>, <br> interest: <a class="struct" href="../../mio/struct.Ready.html" title="struct mio::Ready">Ready</a>, <br> opts: <a class="struct" href="../../mio/struct.PollOpt.html" title="struct mio::PollOpt">PollOpt</a><br>) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#99-101' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Re-register <code>self</code> with the given <code>Poll</code> instance. <a href="../../mio/event/trait.Evented.html#tymethod.reregister">Read more</a></p>
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</div><h4 id='method.deregister' class="method"><span id='deregister.v' class='invisible'><code>fn <a href='../../mio/event/trait.Evented.html#tymethod.deregister' class='fnname'>deregister</a>(&self, poll: &<a class="struct" href="../../mio/struct.Poll.html" title="struct mio::Poll">Poll</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/mio/sys/unix/eventedfd.rs.html#103-105' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Deregister <code>self</code> from the given <code>Poll</code> instance <a href="../../mio/event/trait.Evented.html#tymethod.deregister">Read more</a></p>
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