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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="This library provides type-safe and fully-featured `Mutex` and `RwLock` types which wrap a simple raw mutex or rwlock type. This has several benefits: not only does it eliminate a large portion of the work in implementing custom lock types, it also allows users to write code which is generic with regards to different lock implementations."><meta name="keywords" content="rust, rustlang, rust-lang, lock_api"><title>lock_api - 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="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></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" role="button">☰</div><a href='../lock_api/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><p class="location">Crate lock_api</p><div class="block version"><p>Version 0.4.4</p></div><div class="sidebar-elems"><a id="all-types" href="all.html"><p>See all lock_api's items</p></a><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li></ul></div><p class="location"></p><div id="sidebar-vars" data-name="lock_api" data-ty="mod" data-relpath="../"></div></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Crate <a class="mod" href="">lock_api</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/lock_api/lib.rs.html#8-111" title="goto source code">[src]</a></span></h1><div class="docblock"><p>This library provides type-safe and fully-featured <code>Mutex</code> and <code>RwLock</code>
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../lock_api/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><p class="location">Crate lock_api</p><div class="block version"><p>Version 0.4.4</p></div><div class="sidebar-elems"><a id="all-types" href="all.html"><p>See all lock_api's items</p></a><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#traits">Traits</a></li></ul></div><p class="location"></p><div id="sidebar-vars" data-name="lock_api" data-ty="mod" data-relpath="../"></div><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Crate <a class="mod" href="">lock_api</a><button id="copy-path" onclick="copy_path(this)">⎘</button></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/lock_api/lib.rs.html#8-111" title="goto source code">[src]</a></span></h1><div class="docblock"><p>This library provides type-safe and fully-featured <code>Mutex</code> and <code>RwLock</code>
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types which wrap a simple raw mutex or rwlock type. This has several
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benefits: not only does it eliminate a large portion of the work in
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implementing custom lock types, it also allows users to write code which is
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@@ -21,14 +21,14 @@ locks, see <a href="#extension-traits">extension traits</a> below for details)</
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<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">lock_api</span>::{<span class="ident">RawMutex</span>, <span class="ident">Mutex</span>, <span class="ident">GuardSend</span>};
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::{<span class="ident">AtomicBool</span>, <span class="ident">Ordering</span>};
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<span class="kw">use</span> <span class="ident">std::sync::atomic</span>::{<span class="ident">AtomicBool</span>, <span class="ident">Ordering</span>};
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<span class="comment">// 1. Define our raw lock type</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RawSpinlock</span>(<span class="ident">AtomicBool</span>);
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<span class="comment">// 2. Implement RawMutex for this type</span>
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<span class="kw">unsafe</span> <span class="kw">impl</span> <span class="ident">RawMutex</span> <span class="kw">for</span> <span class="ident">RawSpinlock</span> {
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<span class="kw">const</span> <span class="ident">INIT</span>: <span class="ident">RawSpinlock</span> <span class="op">=</span> <span class="ident">RawSpinlock</span>(<span class="ident">AtomicBool</span>::<span class="ident">new</span>(<span class="bool-val">false</span>));
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<span class="kw">const</span> <span class="ident">INIT</span>: <span class="ident">RawSpinlock</span> <span class="op">=</span> <span class="ident">RawSpinlock</span>(<span class="ident">AtomicBool::new</span>(<span class="bool-val">false</span>));
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<span class="comment">// A spinlock guard can be sent to another thread and unlocked there</span>
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<span class="kw">type</span> <span class="ident">GuardMarker</span> <span class="op">=</span> <span class="ident">GuardSend</span>;
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@@ -41,18 +41,18 @@ locks, see <a href="#extension-traits">extension traits</a> below for details)</
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<span class="kw">fn</span> <span class="ident">try_lock</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
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<span class="self">self</span>.<span class="number">0</span>
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.<span class="ident">compare_exchange</span>(<span class="bool-val">false</span>, <span class="bool-val">true</span>, <span class="ident">Ordering</span>::<span class="ident">Acquire</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>)
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.<span class="ident">compare_exchange</span>(<span class="bool-val">false</span>, <span class="bool-val">true</span>, <span class="ident">Ordering::Acquire</span>, <span class="ident">Ordering::Relaxed</span>)
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.<span class="ident">is_ok</span>()
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}
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<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">unlock</span>(<span class="kw-2">&</span><span class="self">self</span>) {
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<span class="self">self</span>.<span class="number">0</span>.<span class="ident">store</span>(<span class="bool-val">false</span>, <span class="ident">Ordering</span>::<span class="ident">Release</span>);
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<span class="self">self</span>.<span class="number">0</span>.<span class="ident">store</span>(<span class="bool-val">false</span>, <span class="ident">Ordering::Release</span>);
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}
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}
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<span class="comment">// 3. Export the wrappers. This are the types that your users will actually use.</span>
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<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Spinlock</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="ident">lock_api</span>::<span class="ident">Mutex</span><span class="op"><</span><span class="ident">RawSpinlock</span>, <span class="ident">T</span><span class="op">></span>;
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<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">SpinlockGuard</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="ident">lock_api</span>::<span class="ident">MutexGuard</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">RawSpinlock</span>, <span class="ident">T</span><span class="op">></span>;</pre></div>
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<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Spinlock</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="ident">lock_api::Mutex</span><span class="op"><</span><span class="ident">RawSpinlock</span>, <span class="ident">T</span><span class="op">></span>;
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<span class="kw">pub</span> <span class="kw">type</span> <span class="ident">SpinlockGuard</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span><span class="op">></span> <span class="op">=</span> <span class="ident">lock_api::MutexGuard</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">RawSpinlock</span>, <span class="ident">T</span><span class="op">></span>;</pre></div>
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<h1 id="extension-traits" class="section-header"><a href="#extension-traits">Extension traits</a></h1>
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<p>In addition to basic locking & unlocking functionality, you have the option
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of exposing additional functionality in your lock types by implementing
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@@ -118,5 +118,5 @@ downgrading.</p>
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unlocking.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.RawRwLockUpgradeTimed.html" title="lock_api::RawRwLockUpgradeTimed trait">RawRwLockUpgradeTimed</a></td><td class="docblock-short"><p>Additional methods for RwLocks which support upgradable locks and locking
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with timeouts.</p>
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</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../" data-current-crate="lock_api" data-search-js="../search-index.js"></div>
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