130 lines
5.4 KiB
HTML
130 lines
5.4 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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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<title>sig_atomic_t</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_program_sig_atomic_t skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading">sig_atomic_t</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-program.html">program</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><signal.h></code></div>
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<div><span class="mw-geshi c source-c"><span class="kw1">typedef</span> <span class="coMULTI">/* unspecified */</span> sig_atomic_t<span class="sy4">;</span></span></div>
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<p>即使缺少信号所做的异步中断，亦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=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="c source-c">
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<pre class="de1"><span class="co2">#include <signal.h></span>
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<span class="co2">#include <stdio.h></span>
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<span class="kw4">volatile</span> sig_atomic_t gSignalStatus <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
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<span class="kw4">void</span> signal_handler<span class="br0">(</span><span class="kw4">int</span> <a href="c-program-signal.html"><span class="kw497">signal</span></a><span class="br0">)</span>
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<span class="br0">{</span>
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gSignalStatus <span class="sy1">=</span> <a href="c-program-signal.html"><span class="kw497">signal</span></a><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="coMULTI">/* 安装信号处理函数 */</span>
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<a href="c-program-signal.html"><span class="kw497">signal</span></a><span class="br0">(</span><a href="c-program-SIG_types.html"><span class="kw505">SIGINT</span></a>, signal_handler<span class="br0">)</span><span class="sy4">;</span>
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<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"SignalValue: %d<span class="es1">\n</span>"</span>, gSignalStatus<span class="br0">)</span><span class="sy4">;</span>
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<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"Sending signal %d<span class="es1">\n</span>"</span>, <a href="c-program-SIG_types.html"><span class="kw505">SIGINT</span></a><span class="br0">)</span><span class="sy4">;</span>
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<a href="c-program-raise.html"><span class="kw498">raise</span></a><span class="br0">(</span><a href="c-program-SIG_types.html"><span class="kw505">SIGINT</span></a><span class="br0">)</span><span class="sy4">;</span>
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<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"SignalValue: %d<span class="es1">\n</span>"</span>, gSignalStatus<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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<p>可能的输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">SignalValue: 0
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Sending signal 2
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SignalValue: 2</pre></div>
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</div>
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</div>
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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>7.14/2 Signal handling <signal.h> (p: 265)</li>
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</ul>
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</dd>
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</dl>
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<div class="t-ref-std-c99">
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<ul>
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<li>C99 标准（ISO/IEC 9899:1999）：</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>7.14/2 Signal handling <signal.h> (p: 246)</li>
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</ul>
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</dd>
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</dl>
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<div class="t-ref-std-c89">
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<ul>
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<li>C89/C90 标准（ISO/IEC 9899:1990）：</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>4.7 SIGNAL HANDLING <signal.h></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 class="t-dsc-member-div">
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<div><a href="c-program-signal.html"><span class="t-lines"><span>signal</span></span></a></div>
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</div>
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</td>
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<td>为特定的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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