188 lines
12 KiB
HTML
188 lines
12 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 `ScopedKey` struct in crate `scoped_tls`.">
|
|||
|
|
<meta name="keywords" content="rust, rustlang, rust-lang, ScopedKey">
|
|||
|
|
|
|||
|
|
<title>scoped_tls::ScopedKey - 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 struct">
|
|||
|
|
<!--[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'>Struct ScopedKey</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.set">set</a><a href="#method.with">with</a><a href="#method.is_set">is_set</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='index.html'>scoped_tls</a></p><script>window.sidebarCurrent = {name: 'ScopedKey', ty: 'struct', 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'>Struct <a href='index.html'>scoped_tls</a>::<wbr><a class="struct" href=''>ScopedKey</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/scoped_tls/lib.rs.html#94-99' title='goto source code'>[src]</a></span></h1>
|
|||
|
|
<pre class='rust struct'>pub struct ScopedKey<T> { /* fields omitted */ }</pre><div class='docblock'><p>Type representing a thread local storage key corresponding to a reference
|
|||
|
|
to the type parameter <code>T</code>.</p>
|
|||
|
|
<p>Keys are statically allocated and can contain a reference to an instance of
|
|||
|
|
type <code>T</code> scoped to a particular lifetime. Keys provides two methods, <code>set</code>
|
|||
|
|
and <code>with</code>, both of which currently use closures to control the scope of
|
|||
|
|
their contents.</p>
|
|||
|
|
</div>
|
|||
|
|
<h2 id='methods' class='small-section-header'>
|
|||
|
|
Methods<a href='#methods' class='anchor'></a>
|
|||
|
|
</h2>
|
|||
|
|
<h3 id='impl' class='impl'><span class='in-band'><code>impl<T> <a class="struct" href="../scoped_tls/struct.ScopedKey.html" title="struct scoped_tls::ScopedKey">ScopedKey</a><T></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scoped_tls/lib.rs.html#103-197' title='goto source code'>[src]</a></span></h3>
|
|||
|
|
<div class='impl-items'><h4 id='method.set' class="method"><span id='set.v' class='invisible'><code>pub fn <a href='#method.set' class='fnname'>set</a><F, R>(&'static self, t: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T, f: F) -> R <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> R, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scoped_tls/lib.rs.html#137-156' title='goto source code'>[src]</a></span></h4>
|
|||
|
|
<div class='docblock'><p>Inserts a value into this scoped thread local storage slot for a
|
|||
|
|
duration of a closure.</p>
|
|||
|
|
<p>While <code>cb</code> is running, the value <code>t</code> will be returned by <code>get</code> unless
|
|||
|
|
this function is called recursively inside of <code>cb</code>.</p>
|
|||
|
|
<p>Upon return, this function will restore the previous value, if any
|
|||
|
|
was available.</p>
|
|||
|
|
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
|
|||
|
|
<pre class="rust rust-example-rendered">
|
|||
|
|
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">scoped_tls</span>;
|
|||
|
|
|
|||
|
|
<span class="macro">scoped_thread_local</span><span class="macro">!</span>(<span class="kw">static</span> <span class="ident">FOO</span>: <span class="ident">u32</span>);
|
|||
|
|
|
|||
|
|
<span class="ident">FOO</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="number">100</span>, <span class="op">||</span> {
|
|||
|
|
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="ident">FOO</span>.<span class="ident">with</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">v</span>);
|
|||
|
|
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">val</span>, <span class="number">100</span>);
|
|||
|
|
|
|||
|
|
<span class="comment">// set can be called recursively</span>
|
|||
|
|
<span class="ident">FOO</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="number">101</span>, <span class="op">||</span> {
|
|||
|
|
<span class="comment">// ...</span>
|
|||
|
|
});
|
|||
|
|
|
|||
|
|
<span class="comment">// Recursive calls restore the previous value.</span>
|
|||
|
|
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="ident">FOO</span>.<span class="ident">with</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">v</span>);
|
|||
|
|
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">val</span>, <span class="number">100</span>);
|
|||
|
|
});</pre>
|
|||
|
|
</div><h4 id='method.with' class="method"><span id='with.v' class='invisible'><code>pub fn <a href='#method.with' class='fnname'>with</a><F, R>(&'static self, f: F) -> R <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T) -> R, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scoped_tls/lib.rs.html#182-191' title='goto source code'>[src]</a></span></h4>
|
|||
|
|
<div class='docblock'><p>Gets a value out of this scoped variable.</p>
|
|||
|
|
<p>This function takes a closure which receives the value of this
|
|||
|
|
variable.</p>
|
|||
|
|
<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
|
|||
|
|
<p>This function will panic if <code>set</code> has not previously been called.</p>
|
|||
|
|
<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
|
|||
|
|
<pre class="rust rust-example-rendered">
|
|||
|
|
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
|
|||
|
|
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">scoped_tls</span>;
|
|||
|
|
|
|||
|
|
<span class="macro">scoped_thread_local</span><span class="macro">!</span>(<span class="kw">static</span> <span class="ident">FOO</span>: <span class="ident">u32</span>);
|
|||
|
|
|
|||
|
|
<span class="ident">FOO</span>.<span class="ident">with</span>(<span class="op">|</span><span class="ident">slot</span><span class="op">|</span> {
|
|||
|
|
<span class="comment">// work with `slot`</span>
|
|||
|
|
});</pre>
|
|||
|
|
</div><h4 id='method.is_set' class="method"><span id='is_set.v' class='invisible'><code>pub fn <a href='#method.is_set' class='fnname'>is_set</a>(&'static self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scoped_tls/lib.rs.html#194-196' title='goto source code'>[src]</a></span></h4>
|
|||
|
|
<div class='docblock'><p>Test whether this TLS key has been <code>set</code> for the current thread.</p>
|
|||
|
|
</div></div>
|
|||
|
|
<h2 id='implementations' class='small-section-header'>
|
|||
|
|
Trait Implementations<a href='#implementations' class='anchor'></a>
|
|||
|
|
</h2>
|
|||
|
|
<h3 id='impl-Sync' class='impl'><span class='in-band'><code>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../scoped_tls/struct.ScopedKey.html" title="struct scoped_tls::ScopedKey">ScopedKey</a><T></code><a href='#impl-Sync' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/scoped_tls/lib.rs.html#101' title='goto source code'>[src]</a></span></h3>
|
|||
|
|
<div class='impl-items'></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 = "scoped_tls";
|
|||
|
|
</script>
|
|||
|
|
<script src="../main.js"></script>
|
|||
|
|
<script defer src="../search-index.js"></script>
|
|||
|
|
</body>
|
|||
|
|
</html>
|