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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 implementations of `Mutex`, `RwLock`, `Condvar` and `Once` that are smaller, faster and more flexible than those in the Rust standard library. It also provides a `ReentrantMutex` type."><meta name="keywords" content="rust, rustlang, rust-lang, parking_lot"><title>parking_lot - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Semibold.ttf.woff2"><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="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script src="../crates.js"></script><script defer src="../main.js"></script>
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<noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../favicon.svg"></head><body class="rustdoc mod crate"><!--[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 class="sidebar-logo" href="../parking_lot/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.png" alt="logo"></div>
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</a><h2 class="location">Crate parking_lot</h2><div class="block version"><div class="narrow-helper"></div><p>Version 0.12.0</p></div><div class="sidebar-elems"><a id="all-types" href="all.html"><p>See all parking_lot's items</p></a><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#functions">Functions</a></li><li><a href="#types">Type Definitions</a></li></ul></div><div id="sidebar-vars" data-name="parking_lot" data-ty="mod" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../parking_lot/index.html"><img class="rust-logo" src="../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../brush.svg"></button><div id="theme-choices" role="menu"></div></div><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" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><h1 class="fqn"><span class="in-band">Crate <a class="mod" href="#">parking_lot</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></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/parking_lot/lib.rs.html#8-56" title="goto source code">[src]</a></span></h1><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This library provides implementations of <code>Mutex</code>, <code>RwLock</code>, <code>Condvar</code> and
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<code>Once</code> that are smaller, faster and more flexible than those in the Rust
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standard library. It also provides a <code>ReentrantMutex</code> type.</p>
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</div></details><h2 id="reexports" class="small-section-header"><a href="#reexports">Re-exports</a></h2>
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<div class="item-table"><div class="item-row"><div class="item-left import-item"><code>pub use {{root}}::<a class="mod" href="../lock_api/index.html" title="mod lock_api">lock_api</a>;</code></div><div class="item-right docblock-short"></div></div></div><h2 id="structs" class="small-section-header"><a href="#structs">Structs</a></h2>
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<div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Condvar.html" title="parking_lot::Condvar struct">Condvar</a></div><div class="item-right docblock-short"><p>A Condition Variable</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.Once.html" title="parking_lot::Once struct">Once</a></div><div class="item-right docblock-short"><p>A synchronization primitive which can be used to run a one-time
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initialization. Useful for one-time initialization for globals, FFI or
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related functionality.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.RawFairMutex.html" title="parking_lot::RawFairMutex struct">RawFairMutex</a></div><div class="item-right docblock-short"><p>Raw fair mutex type backed by the parking lot.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.RawMutex.html" title="parking_lot::RawMutex struct">RawMutex</a></div><div class="item-right docblock-short"><p>Raw mutex type backed by the parking lot.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.RawRwLock.html" title="parking_lot::RawRwLock struct">RawRwLock</a></div><div class="item-right docblock-short"><p>Raw reader-writer lock type backed by the parking lot.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.RawThreadId.html" title="parking_lot::RawThreadId struct">RawThreadId</a></div><div class="item-right docblock-short"><p>Implementation of the <code>GetThreadId</code> trait for <code>lock_api::ReentrantMutex</code>.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="struct" href="struct.WaitTimeoutResult.html" title="parking_lot::WaitTimeoutResult struct">WaitTimeoutResult</a></div><div class="item-right docblock-short"><p>A type indicating whether a timed wait on a condition variable returned
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due to a time out or not.</p>
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</div></div></div><h2 id="enums" class="small-section-header"><a href="#enums">Enums</a></h2>
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<div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="enum" href="enum.OnceState.html" title="parking_lot::OnceState enum">OnceState</a></div><div class="item-right docblock-short"><p>Current state of a <code>Once</code>.</p>
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</div></div></div><h2 id="functions" class="small-section-header"><a href="#functions">Functions</a></h2>
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<div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.const_fair_mutex.html" title="parking_lot::const_fair_mutex fn">const_fair_mutex</a></div><div class="item-right docblock-short"><p>Creates a new fair mutex in an unlocked state ready for use.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.const_mutex.html" title="parking_lot::const_mutex fn">const_mutex</a></div><div class="item-right docblock-short"><p>Creates a new mutex in an unlocked state ready for use.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.const_reentrant_mutex.html" title="parking_lot::const_reentrant_mutex fn">const_reentrant_mutex</a></div><div class="item-right docblock-short"><p>Creates a new reentrant mutex in an unlocked state ready for use.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="fn" href="fn.const_rwlock.html" title="parking_lot::const_rwlock fn">const_rwlock</a></div><div class="item-right docblock-short"><p>Creates a new instance of an <code>RwLock<T></code> which is unlocked.</p>
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</div></div></div><h2 id="types" class="small-section-header"><a href="#types">Type Definitions</a></h2>
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<div class="item-table"><div class="item-row"><div class="item-left module-item"><a class="type" href="type.FairMutex.html" title="parking_lot::FairMutex type">FairMutex</a></div><div class="item-right docblock-short"><p>A mutual exclusive primitive that is always fair, useful for protecting shared data</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.FairMutexGuard.html" title="parking_lot::FairMutexGuard type">FairMutexGuard</a></div><div class="item-right docblock-short"><p>An RAII implementation of a “scoped lock” of a mutex. When this structure is
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dropped (falls out of scope), the lock will be unlocked.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MappedFairMutexGuard.html" title="parking_lot::MappedFairMutexGuard type">MappedFairMutexGuard</a></div><div class="item-right docblock-short"><p>An RAII mutex guard returned by <code>FairMutexGuard::map</code>, which can point to a
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subfield of the protected data.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MappedMutexGuard.html" title="parking_lot::MappedMutexGuard type">MappedMutexGuard</a></div><div class="item-right docblock-short"><p>An RAII mutex guard returned by <code>MutexGuard::map</code>, which can point to a
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subfield of the protected data.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MappedReentrantMutexGuard.html" title="parking_lot::MappedReentrantMutexGuard type">MappedReentrantMutexGuard</a></div><div class="item-right docblock-short"><p>An RAII mutex guard returned by <code>ReentrantMutexGuard::map</code>, which can point to a
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subfield of the protected data.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MappedRwLockReadGuard.html" title="parking_lot::MappedRwLockReadGuard type">MappedRwLockReadGuard</a></div><div class="item-right docblock-short"><p>An RAII read lock guard returned by <code>RwLockReadGuard::map</code>, which can point to a
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subfield of the protected data.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MappedRwLockWriteGuard.html" title="parking_lot::MappedRwLockWriteGuard type">MappedRwLockWriteGuard</a></div><div class="item-right docblock-short"><p>An RAII write lock guard returned by <code>RwLockWriteGuard::map</code>, which can point to a
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subfield of the protected data.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.Mutex.html" title="parking_lot::Mutex type">Mutex</a></div><div class="item-right docblock-short"><p>A mutual exclusion primitive useful for protecting shared data</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.MutexGuard.html" title="parking_lot::MutexGuard type">MutexGuard</a></div><div class="item-right docblock-short"><p>An RAII implementation of a “scoped lock” of a mutex. When this structure is
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dropped (falls out of scope), the lock will be unlocked.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.ReentrantMutex.html" title="parking_lot::ReentrantMutex type">ReentrantMutex</a></div><div class="item-right docblock-short"><p>A mutex which can be recursively locked by a single thread.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.ReentrantMutexGuard.html" title="parking_lot::ReentrantMutexGuard type">ReentrantMutexGuard</a></div><div class="item-right docblock-short"><p>An RAII implementation of a “scoped lock” of a reentrant mutex. When this structure
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is dropped (falls out of scope), the lock will be unlocked.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.RwLock.html" title="parking_lot::RwLock type">RwLock</a></div><div class="item-right docblock-short"><p>A reader-writer lock</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.RwLockReadGuard.html" title="parking_lot::RwLockReadGuard type">RwLockReadGuard</a></div><div class="item-right docblock-short"><p>RAII structure used to release the shared read access of a lock when
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dropped.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.RwLockUpgradableReadGuard.html" title="parking_lot::RwLockUpgradableReadGuard type">RwLockUpgradableReadGuard</a></div><div class="item-right docblock-short"><p>RAII structure used to release the upgradable read access of a lock when
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dropped.</p>
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</div></div><div class="item-row"><div class="item-left module-item"><a class="type" href="type.RwLockWriteGuard.html" title="parking_lot::RwLockWriteGuard type">RwLockWriteGuard</a></div><div class="item-right docblock-short"><p>RAII structure used to release the exclusive write access of a lock when
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dropped.</p>
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