112 lines
6.1 KiB
HTML
112 lines
6.1 KiB
HTML
<!DOCTYPE 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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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::raise</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_program_raise skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>raise</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-utility.html">utility</a>‎ | <a href="cpp-utility-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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<table class="t-dcl-begin">
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<tbody>
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<td>
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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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<td></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> raise<span class="br0">(</span> <span class="kw4">int</span> sig <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>发送信号 sig 给程序。调用信号处理函数（用 <span class="t-lc"><a href="cpp-utility-program-signal.html">std::signal()</a></span> 函数指定）。</p>
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<p>若仍未用 <span class="t-lc"><a href="cpp-utility-program-signal.html">std::signal()</a></span> 设置用户定义的处理策略，则忽略信号还是调用默认处理函数是实现定义的。</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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<tr class="t-par">
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<td>sig</td>
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<td>-</td>
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<td>要发送的信号。可以是实现定义值或下列值之一：
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<table class="t-dsc-begin">
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<div><a href="cpp-utility-program-SIG_types.html"><span class="t-lines"><span>SIGABRT</span><span>SIGFPE</span><span>SIGILL</span><span>SIGINT</span><span>SIGSEGV</span><span>SIGTERM</span></span></a></div>
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</div>
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</td>
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<td>定义信号类型<br />
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<span class="t-mark">(宏常量)</span></td>
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</tr>
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</table>
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<p><br /></p>
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</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>成功时为 <span class="t-c"><span class="mw-geshi cpp source-cpp">​<span class="nu0">0</span>​</span></span> ，失败时为非零值。</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 class="t-example-live-link"></div>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <csignal></span>
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<span class="co2">#include <iostream></span>
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<span class="kw4">void</span> signal_handler<span class="br0">(</span><span class="kw4">int</span> signal<span class="br0">)</span>
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<span class="br0">{</span>
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<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Received signal "</span> <span class="sy1"><<</span> signal <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><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="br0">)</span>
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<span class="br0">{</span>
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<span class="co1">// 安装信号处理函数</span>
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<a href="cpp-utility-program-signal.html"><span class="kw976">std::<span class="me2">signal</span></span></a><span class="br0">(</span><a href="cpp-utility-program-SIG_types.html"><span class="kw986">SIGTERM</span></a>, signal_handler<span class="br0">)</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Sending signal "</span> <span class="sy1"><<</span> <a href="cpp-utility-program-SIG_types.html"><span class="kw986">SIGTERM</span></a> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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std<span class="sy4">::</span><span class="me2">raise</span><span class="br0">(</span><a href="cpp-utility-program-SIG_types.html"><span class="kw986">SIGTERM</span></a><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">Sending signal 15
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Received signal 15</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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<div class="t-dsc-member-div">
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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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</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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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</body>
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