233 lines
No EOL
11 KiB
HTML
233 lines
No EOL
11 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 `timer` mod in crate `tokio`.">
|
||
<meta name="keywords" content="rust, rustlang, rust-lang, timer">
|
||
|
||
<title>tokio::timer - 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="../../light.css" id="themeStyle">
|
||
<script src="../../storage.js"></script>
|
||
|
||
|
||
|
||
|
||
</head>
|
||
<body class="rustdoc mod">
|
||
<!--[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'>Module timer</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><p class='location'><a href='../index.html'>tokio</a></p><script>window.sidebarCurrent = {name: 'timer', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div>
|
||
</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'>Module <a href='../index.html'>tokio</a>::<wbr><a class="mod" href=''>timer</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/timer.rs.html#1-86' title='goto source code'>[src]</a></span></h1><div class='docblock'><p>Utilities for tracking time.</p>
|
||
<p>This module provides a number of types for executing code after a set period
|
||
of time.</p>
|
||
<ul>
|
||
<li>
|
||
<p>[<code>Delay</code>][Delay] is a future that does no work and completes at a specific <code>Instant</code>
|
||
in time.</p>
|
||
</li>
|
||
<li>
|
||
<p>[<code>Interval</code>][Interval] is a stream yielding a value at a fixed period. It
|
||
is initialized with a <code>Duration</code> and repeatedly yields each time the
|
||
duration elapses.</p>
|
||
</li>
|
||
<li>
|
||
<p>[<code>Deadline</code>][Deadline] wraps a future, requiring that it completes before
|
||
a specified <code>Instant</code> in time. If the future does not complete in time,
|
||
then it is canceled and an error is returned.</p>
|
||
</li>
|
||
</ul>
|
||
<p>These types are sufficient for handling a large number of scenarios
|
||
involving time.</p>
|
||
<p>These types must be used from within the context of the
|
||
<a href="../runtime/struct.Runtime.html"><code>Runtime</code></a> or a timer context must be setup explicitly. See the
|
||
<a href="https://docs.rs/tokio-timer"><code>tokio-timer</code></a> crate for more details on how to setup a timer
|
||
context.</p>
|
||
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
|
||
<p>Wait 100ms and print "Hello World!"</p>
|
||
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">tokio</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
|
||
<span class="kw">use</span> <span class="ident">tokio</span>::<span class="ident">timer</span>::<span class="ident">Delay</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">Instant</span>};
|
||
|
||
<span class="kw">let</span> <span class="ident">when</span> <span class="op">=</span> <span class="ident">Instant</span>::<span class="ident">now</span>() <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">100</span>);
|
||
|
||
<span class="ident">tokio</span>::<span class="ident">run</span>({
|
||
<span class="ident">Delay</span>::<span class="ident">new</span>(<span class="ident">when</span>)
|
||
.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"timer failed; err={:?}"</span>, <span class="ident">e</span>))
|
||
.<span class="ident">and_then</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> {
|
||
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"Hello world!"</span>);
|
||
<span class="prelude-val">Ok</span>(())
|
||
})
|
||
})</pre>
|
||
<p>Require that an operation takes no more than 300ms. Note that this uses the
|
||
<a href="../util/trait.FutureExt.html#method.deadline"><code>deadline</code></a> function on the <a href="../util/trait.FutureExt.html#method.deadline"><code>FutureExt</code></a> trait. This trait is
|
||
included in the prelude.</p>
|
||
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">use</span> <span class="ident">tokio</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">Instant</span>};
|
||
|
||
<span class="kw">fn</span> <span class="ident">long_op</span>() <span class="op">-></span> <span class="ident">Box</span><span class="op"><</span><span class="ident">Future</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> (), <span class="ident">Error</span> <span class="op">=</span> ()<span class="op">></span> <span class="op">+</span> <span class="ident">Send</span><span class="op">></span> {
|
||
<span class="comment">// ...</span>
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">when</span> <span class="op">=</span> <span class="ident">Instant</span>::<span class="ident">now</span>() <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">300</span>);
|
||
|
||
<span class="ident">tokio</span>::<span class="ident">run</span>({
|
||
<span class="ident">long_op</span>()
|
||
.<span class="ident">deadline</span>(<span class="ident">when</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">"operation timed out"</span>);
|
||
})
|
||
})</pre>
|
||
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
|
||
<table>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Deadline.html"
|
||
title='struct tokio::timer::Deadline'>Deadline</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Allows a given <code>Future</code> to execute until the specified deadline.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.DeadlineError.html"
|
||
title='struct tokio::timer::DeadlineError'>DeadlineError</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Error returned by <code>Deadline</code> future.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Delay.html"
|
||
title='struct tokio::timer::Delay'>Delay</a></td>
|
||
<td class='docblock-short'>
|
||
<p>A future that completes at a specified instant in time.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Error.html"
|
||
title='struct tokio::timer::Error'>Error</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Errors encountered by the timer implementation.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Interval.html"
|
||
title='struct tokio::timer::Interval'>Interval</a></td>
|
||
<td class='docblock-short'>
|
||
<p>A stream representing notifications at fixed interval</p>
|
||
|
||
</td>
|
||
</tr></table></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> |