103 lines
6.1 KiB
HTML
103 lines
6.1 KiB
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>std::coroutine_handle<Promise>::operator(), std::coroutine_handle<Promise>::resume</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_coroutine_coroutine_handle_resume skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::coroutine_handle<Promise>::</span>operator(), <span style="font-size:0.7em; line-height:130%">std::coroutine_handle<Promise>::</span>resume</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-coroutine.html">coroutine</a>‎ | <a href="cpp-coroutine-coroutine_handle.html">coroutine handle</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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<div>其他特化的成员</div>
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</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> operator<span class="br0">(</span><span class="br0">)</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span><br />
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<span class="kw4">void</span> resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<div>特化 <code>std::coroutine_handle<std::noop_coroutine_promise></code> 的成员</div>
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<td></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <span class="kw4">void</span> operator<span class="br0">(</span><span class="br0">)</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
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<span class="kw4">constexpr</span> <span class="kw4">void</span> resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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</td>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<div class="t-li1"><span class="t-li">1)</span> 恢复 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 所指代的协程的执行，或若该协程为无操作协程则不做任何事。</div>
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<div class="t-li1"><span class="t-li">2)</span> 不做任何事。</div>
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<p>若 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 不指代暂停的协程，或该协程不是无操作协程且在最终暂停点暂停，则行为未定义。同时恢复协程可能导致数据竞争。</p>
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<p>在不同于协程暂停所在的执行代理上恢复协程拥有实现定义行为，除非每个执行代理都是由 <span class="t-lc"><a href="cpp-thread-thread.html">std::thread</a></span> 或 <span class="t-lc">std::jthread</span> 表示的线程，或执行 <code>main</code> 的线程。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p>在不同执行代理上恢复的协程应该处处避免依赖一致的线程同一性，例如跨过暂停点保有互斥体对象。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-coroutine-coroutine_handle-destroy.html"><span class="t-lines"><span>destroy</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>销毁协程<br />
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<span class="t-mark">(公开成员函数)</span></td>
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