413 lines
35 KiB
HTML
413 lines
35 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>标准库头文件 <mutex></title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_header_mutex skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <mutex></h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-header.html">header</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p>此头文件是<a href="cpp-thread.html">线程支持</a>库的一部分。</p>
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<table class="t-dsc-begin">
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-mutex.html"><span class="t-lines"><span>mutex</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>提供基本互斥设施<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-timed_mutex.html"><span class="t-lines"><span>timed_mutex</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>提供互斥设施，实现有时限锁定<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-recursive_mutex.html"><span class="t-lines"><span>recursive_mutex</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>提供能被同一线程递归锁定的互斥设施<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-recursive_timed_mutex.html"><span class="t-lines"><span>recursive_timed_mutex</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>提供能被同一线程递归锁定的互斥设施，并实现有时限锁定<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-lock_guard.html"><span class="t-lines"><span>lock_guard</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>实现严格基于作用域的互斥体所有权包装器<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-unique_lock.html"><span class="t-lines"><span>unique_lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>实现可移动的互斥体所有权包装器<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-scoped_lock.html"><span class="t-lines"><span>scoped_lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>用于多个互斥体的免死锁 RAII 封装器<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-lock_tag_t.html"><span class="t-lines"><span>defer_lock_t</span><span>try_to_lock_t</span><span>adopt_lock_t</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>用于指定锁定策略的标签类型<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-once_flag.html"><span class="t-lines"><span>once_flag</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>确保 <a href="cpp-thread-call_once.html"><tt>call_once</tt></a> 只调用函数一次的帮助对象<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E5.B8.B8.E9.87.8F">常量</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-lock_tag.html"><span class="t-lines"><span>defer_lock</span><span>try_to_lock</span><span>adopt_lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>用于指定锁定策略的标签常量<br />
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<span class="t-mark">(常量)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-try_lock.html"><span class="t-lines"><span>try_lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>试图通过重复调用 <code>try_lock</code> 获得互斥体的所有权<br />
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<span class="t-mark">(函数模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-lock.html"><span class="t-lines"><span>lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>锁定指定的互斥体，若任何一个不可用则阻塞<br />
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<span class="t-mark">(函数模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-call_once.html"><span class="t-lines"><span>call_once</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>仅调用函数一次，即使从多个线程调用<br />
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<span class="t-mark">(函数模板)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-thread-unique_lock-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::unique_lock)</span></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td><span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> 对 <code>unique_lock</code> 的特化<br />
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<span class="t-mark">(函数模板)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> mutex<span class="sy4">;</span>
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<span class="kw1">class</span> recursive_mutex<span class="sy4">;</span>
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<span class="kw1">class</span> timed_mutex<span class="sy4">;</span>
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<span class="kw1">class</span> recursive_timed_mutex<span class="sy4">;</span>
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<span class="kw1">struct</span> defer_lock_t <span class="br0">{</span> <span class="kw1">explicit</span> defer_lock_t<span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">struct</span> try_to_lock_t <span class="br0">{</span> <span class="kw1">explicit</span> try_to_lock_t<span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">struct</span> adopt_lock_t <span class="br0">{</span> <span class="kw1">explicit</span> adopt_lock_t<span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">inline</span> <span class="kw4">constexpr</span> defer_lock_t defer_lock <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">inline</span> <span class="kw4">constexpr</span> try_to_lock_t try_to_lock <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">inline</span> <span class="kw4">constexpr</span> adopt_lock_t adopt_lock <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span> <span class="kw1">class</span> lock_guard<span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span>... <span class="me1">MutexTypes</span><span class="sy1">></span> <span class="kw1">class</span> scoped_lock<span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span> <span class="kw1">class</span> unique_lock<span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span>
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<span class="kw4">void</span> swap<span class="br0">(</span>unique_lock<span class="sy1"><</span>Mutex<span class="sy1">></span><span class="sy3">&</span> x, unique_lock<span class="sy1"><</span>Mutex<span class="sy1">></span><span class="sy3">&</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> L1, <span class="kw1">class</span> L2, <span class="kw1">class</span>... <span class="me1">L3</span><span class="sy1">></span> <span class="kw4">int</span> try_lock<span class="br0">(</span>L1<span class="sy3">&</span>, L2<span class="sy3">&</span>, L3<span class="sy3">&</span>...<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> L1, <span class="kw1">class</span> L2, <span class="kw1">class</span>... <span class="me1">L3</span><span class="sy1">></span> <span class="kw4">void</span> lock<span class="br0">(</span>L1<span class="sy3">&</span>, L2<span class="sy3">&</span>, L3<span class="sy3">&</span>...<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">struct</span> once_flag<span class="sy4">;</span>
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<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Callable, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">></span>
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<span class="kw4">void</span> call_once<span class="br0">(</span>once_flag<span class="sy3">&</span> flag, Callable<span class="sy3">&&</span> func, Args<span class="sy3">&&</span>... <span class="me1">args</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB_std::mutex">类 <span class="t-lc"><a href="cpp-thread-mutex.html">std::mutex</a></span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> mutex <span class="br0">{</span>
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<span class="kw1">public</span><span class="sy4">:</span>
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<span class="kw4">constexpr</span> mutex<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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~mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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mutex<span class="br0">(</span><span class="kw4">const</span> mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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mutex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">using</span> native_handle_type <span class="sy1">=</span> <span class="coMULTI">/* 由实现定义 */</span><span class="sy4">;</span>
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native_handle_type native_handle<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB_std::recursive_mutex">类 <span class="t-lc"><a href="cpp-thread-recursive_mutex.html">std::recursive_mutex</a></span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> recursive_mutex <span class="br0">{</span>
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<span class="kw1">public</span><span class="sy4">:</span>
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recursive_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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~recursive_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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recursive_mutex<span class="br0">(</span><span class="kw4">const</span> recursive_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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recursive_mutex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> recursive_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">using</span> native_handle_type <span class="sy1">=</span> <span class="coMULTI">/* 由实现定义 */</span><span class="sy4">;</span>
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native_handle_type native_handle<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB_std::timed_mutex">类 <span class="t-lc"><a href="cpp-thread-timed_mutex.html">std::timed_mutex</a></span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> timed_mutex <span class="br0">{</span>
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<span class="kw1">public</span><span class="sy4">:</span>
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timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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~timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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timed_mutex<span class="br0">(</span><span class="kw4">const</span> timed_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
timed_mutex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> timed_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 阻塞</span>
|
|
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1"><</span>Rep, Period<span class="sy1">></span><span class="sy3">&</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
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|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1"><</span>Clock, Duration<span class="sy1">></span><span class="sy3">&</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">using</span> native_handle_type <span class="sy1">=</span> <span class="coMULTI">/* 由实现定义 */</span><span class="sy4">;</span>
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native_handle_type native_handle<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span><span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB_std::recursive_timed_mutex">类 <span class="t-lc"><a href="cpp-thread-recursive_timed_mutex.html">std::recursive_timed_mutex</a></span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">class</span> recursive_timed_mutex <span class="br0">{</span>
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<span class="kw1">public</span><span class="sy4">:</span>
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recursive_timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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~recursive_timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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recursive_timed_mutex<span class="br0">(</span><span class="kw4">const</span> recursive_timed_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
recursive_timed_mutex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> recursive_timed_mutex<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
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<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 阻塞</span>
|
|
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1"><</span>Rep, Period<span class="sy1">></span><span class="sy3">&</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1"><</span>Clock, Duration<span class="sy1">></span><span class="sy3">&</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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|
<span class="kw1">using</span> native_handle_type <span class="sy1">=</span> <span class="coMULTI">/* 由实现定义 */</span><span class="sy4">;</span>
|
|
native_handle_type native_handle<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
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</div>
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<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::lock_guard">类模板 <span class="t-lc"><a href="cpp-thread-lock_guard.html">std::lock_guard</a></span></span></h4>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span>
|
|
<span class="kw1">class</span> lock_guard <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="kw1">using</span> mutex_type <span class="sy1">=</span> Mutex<span class="sy4">;</span>
|
|
|
|
<span class="kw1">explicit</span> lock_guard<span class="br0">(</span>mutex_type<span class="sy3">&</span> m<span class="br0">)</span><span class="sy4">;</span>
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|
lock_guard<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, adopt_lock_t<span class="br0">)</span><span class="sy4">;</span>
|
|
~lock_guard<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
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|
|
|
lock_guard<span class="br0">(</span><span class="kw4">const</span> lock_guard<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
lock_guard<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> lock_guard<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
|
|
<span class="kw1">private</span><span class="sy4">:</span>
|
|
mutex_type<span class="sy3">&</span> pm<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::scoped_lock">类模板 <span class="t-lc">std::scoped_lock</span></span></h4>
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|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span>... <span class="me1">MutexTypes</span><span class="sy1">></span>
|
|
<span class="kw1">class</span> scoped_lock <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="kw1">using</span> mutex_type <span class="sy1">=</span> Mutex<span class="sy4">;</span> <span class="co1">// 若 MutexTypes... 仅由单个类型 Mutex 组成</span>
|
|
|
|
<span class="kw1">explicit</span> scoped_lock<span class="br0">(</span>MutexTypes<span class="sy3">&</span>... <span class="me1">m</span><span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">explicit</span> scoped_lock<span class="br0">(</span>adopt_lock_t, MutexTypes<span class="sy3">&</span>... <span class="me1">m</span><span class="br0">)</span><span class="sy4">;</span>
|
|
~scoped_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
scoped_lock<span class="br0">(</span><span class="kw4">const</span> scoped_lock<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
scoped_lock<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> scoped_lock<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
|
|
<span class="kw1">private</span><span class="sy4">:</span>
|
|
tuple<span class="sy1"><</span>MutexTypes<span class="sy3">&</span>...<span class="sy1">></span> pm<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::unique_lock">类模板 <span class="t-lc"><a href="cpp-thread-unique_lock.html">std::unique_lock</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span>
|
|
<span class="kw1">class</span> unique_lock <span class="br0">{</span>
|
|
<span class="kw1">public</span><span class="sy4">:</span>
|
|
<span class="kw1">using</span> mutex_type <span class="sy1">=</span> Mutex<span class="sy4">;</span>
|
|
|
|
<span class="co1">// 构造/复制/销毁</span>
|
|
unique_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">explicit</span> unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m<span class="br0">)</span><span class="sy4">;</span>
|
|
unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, defer_lock_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, try_to_lock_t<span class="br0">)</span><span class="sy4">;</span>
|
|
unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, adopt_lock_t<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">></span>
|
|
unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, <span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1"><</span>Clock, Duration<span class="sy1">></span><span class="sy3">&</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">></span>
|
|
unique_lock<span class="br0">(</span>mutex_type<span class="sy3">&</span> m, <span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1"><</span>Rep, Period<span class="sy1">></span><span class="sy3">&</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
|
|
~unique_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
unique_lock<span class="br0">(</span><span class="kw4">const</span> unique_lock<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
unique_lock<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> unique_lock<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
|
|
unique_lock<span class="br0">(</span>unique_lock<span class="sy3">&&</span> u<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
unique_lock<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span>unique_lock<span class="sy3">&&</span> u<span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 锁定</span>
|
|
<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1"><</span>Rep, Period<span class="sy1">></span><span class="sy3">&</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">></span>
|
|
<span class="kw4">bool</span> try_lock_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1"><</span>Clock, Duration<span class="sy1">></span><span class="sy3">&</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 修改器</span>
|
|
<span class="kw4">void</span> swap<span class="br0">(</span>unique_lock<span class="sy3">&</span> u<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
mutex_type<span class="sy2">*</span> release<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="co1">// 观察器</span>
|
|
<span class="kw4">bool</span> owns_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="kw1">explicit</span> operator <span class="kw4">bool</span> <span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
mutex_type<span class="sy2">*</span> mutex<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">private</span><span class="sy4">:</span>
|
|
mutex_type<span class="sy2">*</span> pm<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="kw4">bool</span> owns<span class="sy4">;</span> <span class="co1">// 仅用于阐释</span>
|
|
<span class="br0">}</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> Mutex<span class="sy1">></span>
|
|
<span class="kw4">void</span> swap<span class="br0">(</span>unique_lock<span class="sy1"><</span>Mutex<span class="sy1">></span><span class="sy3">&</span> x, unique_lock<span class="sy1"><</span>Mutex<span class="sy1">></span><span class="sy3">&</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<h4><span class="mw-headline" id=".E7.B1.BB_std::once_flag">类 <span class="t-lc"><a href="cpp-thread-once_flag.html">std::once_flag</a></span></span></h4>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="cpp source-cpp">
|
|
<pre class="de1"><span class="kw1">struct</span> once_flag <span class="br0">{</span>
|
|
<span class="kw4">constexpr</span> once_flag<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
|
|
once_flag<span class="br0">(</span><span class="kw4">const</span> once_flag<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
once_flag<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> once_flag<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
|
|
<span class="br0">}</span><span class="sy4">;</span></pre></div>
|
|
</div>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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