71 lines
3.6 KiB
HTML
71 lines
3.6 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::sig_atomic_t</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_program_sig_atomic_t 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::</span>sig_atomic_t</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-utility.html">utility</a>‎ | <a href="cpp-utility-program.html">program</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-csignal.html"><csignal></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">typedef</span> <span class="coMULTI">/* unspecified */</span> sig_atomic_t<span class="sy4">;</span></span></div>
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<p>即使在信号所为的异步中断的存在中，都能作为原子实体访问的整数类型。</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>在引入 <span class="t-lc"><a href="cpp-atomic-atomic.html">std::atomic</a></span> 和 <span class="t-lc"><a href="cpp-atomic-atomic_signal_fence.html">std::atomic_signal_fence</a></span> 的 C++11 前，严格遵从程序在信号处理函数所能做的唯有赋值给 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">volatile</span> <span class="kw4">static</span> std<span class="sy4">::</span><span class="me2">sig_atomic_t</span></span></span> 变量并立即返回。</p>
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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-utility-program-signal.html"><span class="t-lines"><span>signal</span></span></a></div>
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</td>
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<td>为特定信号设置信号处理函数<br />
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<span class="t-mark">(函数)</span></td>
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<div><a href="cpp-atomic-atomic_signal_fence.html"><span class="t-lines"><span>atomic_signal_fence</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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<td>线程与执行于同一线程的信号处理函数间的栅栏<br />
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<span class="t-mark">(函数)</span></td>
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