83 lines
4.0 KiB
HTML
83 lines
4.0 KiB
HTML
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<title>atomic_signal_fence</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_atomic_atomic_signal_fence skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading">atomic_signal_fence</h1>
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<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-atomic.html">atomic</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>定义于头文件 <code><stdatomic.h></code></div>
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<div><span class="mw-geshi c source-c"><span class="kw4">void</span> atomic_signal_fence<span class="br0">(</span> <a href="c-atomic-memory_order.html"><span class="kw910">memory_order</span></a> order <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-c11">(C11 起)</span></td>
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<p>在线程和同一线程上执行的信号处理函数之间，建立以 <code>order</code> 指示的非原子和宽松原子访问的内存同步顺序。这等价于 <span class="t-lc"><a href="c-atomic-atomic_thread_fence.html">atomic_thread_fence</a></span> ，除了不为内存顺序产生 CPU 指令。只会以 <code>order</code> 指示抑制编译器重排指令。例如，拥有释放语义的栅栏阻止移到读或写到后继写入之后，而拥有获得语义的栅栏阻止移动读或写到前驱读取之前。</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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<table class="t-par-begin">
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<td>order</td>
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<td>-</td>
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<td>此栅栏执行的内存顺序</td>
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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=".E5.BC.95.E7.94.A8">引用</span></h3>
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<div class="t-ref-std-11">
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<ul>
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<li>C11 标准（ISO/IEC 9899:2011）：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li>7.17.4.2 The atomic_signal_fence function (p: 279)</li>
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</ul>
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</dd>
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</dl>
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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="c-atomic-atomic_thread_fence.html"><span class="t-lines"><span>atomic_thread_fence</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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<td>通用的内存顺序依赖的栅栏同步原语<br />
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<span class="t-mark">(函数)</span></td>
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