104 lines
7.5 KiB
HTML
104 lines
7.5 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>std::stop_callback</title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_thread_stop_callback skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>stop_callback</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-thread.html">thread</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<table class="t-dcl-begin">
|
|
<tbody>
|
|
<tr class="t-dsc-header">
|
|
<td>
|
|
<div>定义于头文件 <code><a href="cpp-header-stop_token.html"><stop_token></a></code></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Callback <span class="sy1">></span><br />
|
|
<span class="kw1">class</span> stop_callback<span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td class="t-dcl-nopad"></td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p><code>stop_callback</code> 类模板提供对关联的 <a href="cpp-thread-stop_token.html"><tt>std::stop_token</tt></a> 对象注册回调函数的 RAII 对象类型，使得将在 <a href="cpp-thread-stop_token.html"><tt>std::stop_token</tt></a> 的关联 <a href="cpp-thread-stop_source.html"><tt>std::stop_source</tt></a> 被请求停止时调用回调函数。</p>
|
|
<p>在对该 <code>stop_callback</code> 的关联 <a href="cpp-thread-stop_token.html"><tt>std::stop_token</tt></a> 的<a href="cpp-thread-stop_source.html"><tt>std::stop_source</tt></a> 成功调用 <span class="t-c"><span class="mw-geshi cpp source-cpp">request_stop<span class="br0">(</span><span class="br0">)</span></span></span> 的同一线程调用经由 <code>stop_callback</code> 构造函数注册的回调函数；或若在构造函数的注册前已请求停止，则在构造 <code>stop_callback</code> 的线程调用回调函数。</p>
|
|
<p>能在同一或不同线程同时对同一 <a href="cpp-thread-stop_token.html"><tt>std::stop_token</tt></a> 创建多于一个 <code>stop_callback</code> 。不提供对执行它们所用顺序的保证，但将同步调用它们；除了对已对 <a href="cpp-thread-stop_token.html"><tt>std::stop_token</tt></a> 请求停止后构造的 <code>stop_callback</code> 如前述。</p>
|
|
<p>若调用的回调经由异常退出，则调用 <span class="t-lc"><a href="cpp-error-terminate.html">std::terminate</a></span> 。</p>
|
|
<p><code>std::stop_callback</code> 非<a href="cpp-named_req-CopyConstructible.html"><span style="font-style:italic">可复制构造</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyConstructible)</span></a> 、<a href="cpp-named_req-CopyAssignable.html"><span style="font-style:italic">可复制赋值</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyAssignable)</span></a> 、<a href="cpp-named_req-MoveConstructible.html"><span style="font-style:italic">可移动构造</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(MoveConstructible)</span></a> 亦非<a href="cpp-named_req-MoveAssignable.html"><span style="font-style:italic">可移动赋值</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(MoveAssignable)</span></a> 。</p>
|
|
<p>模板形参 <code>Callback</code> 类型必须为 <a href="cpp-concepts-invocable.html"><code>invocable</code></a> 且 <a href="cpp-concepts-destructible.html"><code>destructible</code></a> 。忽略任何返回值。</p>
|
|
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">成员类型</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc-hitem">
|
|
<td>类型</td>
|
|
<td>定义</td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td><code>callback_type</code></td>
|
|
<td><code>Callback</code></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div t-dsc-member-nobold-div">
|
|
<div><a href="cpp-thread-stop_callback-stop_callback.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>构造新的 <code>stop_callback</code> 对象<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div t-dsc-member-nobold-div">
|
|
<div><a href="cpp-thread-stop_callback-~stop_callback.html"><span class="t-lines"><span>(析构函数)</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>析构 <code>stop_callback</code> 对象<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><span class="t-lines"><span>operator=</span></span></div>
|
|
<div><span class="t-lines"><span><span class="t-cmark">[被删除]</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td><code>stop_callback</code> 不可赋值<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.8E.A8.E5.AF.BC.E6.8C.87.E5.BC.95"><a href="cpp-thread-stop_callback-deduction_guides.html">推导指引</a></span></h3>
|
|
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
|
|
<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
|
|
<tr>
|
|
<td class="mbox-empty-cell"></td>
|
|
<td class="mbox-text" style="">本节未完成<br />
|
|
原因：暂无示例</td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|