153 lines
7.5 KiB
HTML
153 lines
7.5 KiB
HTML
|
<!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 `spawn` fn in crate `tokio`.">
|
|||
|
|
<meta name="keywords" content="rust, rustlang, rust-lang, spawn">
|
|||
|
|
|
|||
|
|
<title>tokio::executor::spawn - 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="../../dark.css">
|
|||
|
|
<link rel="stylesheet" type="text/css" href="../../main.css" id="themeStyle">
|
|||
|
|
<script src="../../storage.js"></script>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</head>
|
|||
|
|
<body class="rustdoc fn">
|
|||
|
|
<!--[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">☰</div>
|
|||
|
|
|
|||
|
|
<p class='location'><a href='../index.html'>tokio</a>::<wbr><a href='index.html'>executor</a></p><script>window.sidebarCurrent = {name: 'spawn', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
<div class="theme-picker">
|
|||
|
|
<button id="theme-picker" aria-label="Pick another theme!">
|
|||
|
|
<img src="../../brush.svg" width="18" alt="Pick another theme!">
|
|||
|
|
</button>
|
|||
|
|
<div id="theme-choices"></div>
|
|||
|
|
</div>
|
|||
|
|
<script src="../../theme.js"></script>
|
|||
|
|
<nav class="sub">
|
|||
|
|
<form class="search-form js-only">
|
|||
|
|
<div class="search-container">
|
|||
|
|
<input class="search-input" name="search"
|
|||
|
|
autocomplete="off"
|
|||
|
|
placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
|
|||
|
|
type="search">
|
|||
|
|
</div>
|
|||
|
|
</form>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
<section id='main' class="content">
|
|||
|
|
<h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>tokio</a>::<wbr><a href='index.html'>executor</a>::<wbr><a class="fn" href=''>spawn</a></span><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'>−</span>]
|
|||
|
|
</a>
|
|||
|
|
</span><a class='srclink' href='../../src/tokio/executor/mod.rs.html#204-209' title='goto source code'>[src]</a></span></h1>
|
|||
|
|
<pre class='rust fn'>pub fn spawn<F>(f: F) -> <a class="struct" href="../../tokio/executor/struct.Spawn.html" title="struct tokio::executor::Spawn">Spawn</a> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../tokio/prelude/future/trait.Future.html" title="trait tokio::prelude::future::Future">Future</a><Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Error = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>> + 'static + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></pre><div class='docblock'><p>Spawns a future on the default executor.</p>
|
|||
|
|
<p>In order for a future to do work, it must be spawned on an executor. The
|
|||
|
|
<code>spawn</code> function is the easiest way to do this. It spawns a future on the
|
|||
|
|
<a href="struct.DefaultExecutor.html">default executor</a> for the current execution context (tracked using a
|
|||
|
|
thread-local variable).</p>
|
|||
|
|
<p>The default executor is <strong>usually</strong> a thread pool.</p>
|
|||
|
|
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
|
|||
|
|
<p>In this example, a server is started and <code>spawn</code> is used to start a new task
|
|||
|
|
that processes each received connection.</p>
|
|||
|
|
|
|||
|
|
<pre class="rust rust-example-rendered">
|
|||
|
|
<span class="kw">use</span> <span class="ident">tokio</span>::<span class="ident">net</span>::<span class="ident">TcpListener</span>;
|
|||
|
|
|
|||
|
|
<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="kw-2">&</span><span class="ident">addr</span>).<span class="ident">unwrap</span>();
|
|||
|
|
|
|||
|
|
<span class="kw">let</span> <span class="ident">server</span> <span class="op">=</span> <span class="ident">listener</span>.<span class="ident">incoming</span>()
|
|||
|
|
.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"error = {:?}"</span>, <span class="ident">e</span>))
|
|||
|
|
.<span class="ident">for_each</span>(<span class="op">|</span><span class="ident">socket</span><span class="op">|</span> {
|
|||
|
|
<span class="ident">tokio</span>::<span class="ident">spawn</span>(<span class="ident">process</span>(<span class="ident">socket</span>))
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
<span class="ident">tokio</span>::<span class="ident">run</span>(<span class="ident">server</span>);</pre>
|
|||
|
|
<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
|
|||
|
|
<p>This function will panic if the default executor is not set or if spawning
|
|||
|
|
onto the default executor returns an error. To avoid the panic, use
|
|||
|
|
<a href="struct.DefaultExecutor.html"><code>DefaultExecutor</code></a>.</p>
|
|||
|
|
</div></section>
|
|||
|
|
<section id='search' class="content hidden"></section>
|
|||
|
|
|
|||
|
|
<section class="footer"></section>
|
|||
|
|
|
|||
|
|
<aside id="help" class="hidden">
|
|||
|
|
<div>
|
|||
|
|
<h1 class="hidden">Help</h1>
|
|||
|
|
|
|||
|
|
<div class="shortcuts">
|
|||
|
|
<h2>Keyboard Shortcuts</h2>
|
|||
|
|
|
|||
|
|
<dl>
|
|||
|
|
<dt><kbd>?</kbd></dt>
|
|||
|
|
<dd>Show this help dialog</dd>
|
|||
|
|
<dt><kbd>S</kbd></dt>
|
|||
|
|
<dd>Focus the search field</dd>
|
|||
|
|
<dt><kbd>↑</kbd></dt>
|
|||
|
|
<dd>Move up in search results</dd>
|
|||
|
|
<dt><kbd>↓</kbd></dt>
|
|||
|
|
<dd>Move down in search results</dd>
|
|||
|
|
<dt><kbd>↹</kbd></dt>
|
|||
|
|
<dd>Switch tab</dd>
|
|||
|
|
<dt><kbd>⏎</kbd></dt>
|
|||
|
|
<dd>Go to active search result</dd>
|
|||
|
|
<dt><kbd>+</kbd></dt>
|
|||
|
|
<dd>Expand all sections</dd>
|
|||
|
|
<dt><kbd>-</kbd></dt>
|
|||
|
|
<dd>Collapse all sections</dd>
|
|||
|
|
</dl>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<div class="infos">
|
|||
|
|
<h2>Search Tricks</h2>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Prefix searches with a type followed by a colon (e.g.
|
|||
|
|
<code>fn:</code>) to restrict the search to a given type.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Accepted types are: <code>fn</code>, <code>mod</code>,
|
|||
|
|
<code>struct</code>, <code>enum</code>,
|
|||
|
|
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
|||
|
|
and <code>const</code>.
|
|||
|
|
</p>
|
|||
|
|
|
|||
|
|
<p>
|
|||
|
|
Search functions by type signature (e.g.
|
|||
|
|
<code>vec -> usize</code> or <code>* -> vec</code>)
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</aside>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script>
|
|||
|
|
window.rootPath = "../../";
|
|||
|
|
window.currentCrate = "tokio";
|
|||
|
|
</script>
|
|||
|
|
<script src="../../main.js"></script>
|
|||
|
|
<script defer src="../../search-index.js"></script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|