klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

上传cppreference

Browse Source
This commit is contained in:
klarkxy
2025-08-01 12:57:54 +08:00
parent e29892f8cd
commit 196e706fe4
5485 changed files with 982007 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

126
web/cppreference-zh/chmhelp/cpp-utility-program-longjmp.html Normal file
View File

@@ -0,0 +1,126 @@
<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>std::longjmp</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_program_longjmp skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>longjmp</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-utility.html">utility</a>&lrm; | <a href="cpp-utility-program.html">program</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dsc-header">
<td>
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-csetjmp.html">&lt;csetjmp&gt;</a></code></div>
</td>
<td></td>
<td></td>
</tr>
</tbody>
<tbody class="t-dcl-rev">
<tr class="t-dcl t-until-cxx17">
<td>
<div><span class="mw-geshi cpp source-cpp">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="kw4">void</span> longjmp<span class="br0">(</span> <a href="cpp-utility-program-jmp_buf.html"><span class="kw989">std::<span class="me2">jmp_buf</span></span></a> env, <span class="kw4">int</span> status <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-until-cxx17">(C++17 &#21069;)</span></td>
</tr>
<tr class="t-dcl t-since-cxx17">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="br0">[</span><span class="br0">[</span>noreturn<span class="br0">]</span><span class="br0">]</span> <span class="kw4">void</span> longjmp<span class="br0">(</span> <a href="cpp-utility-program-jmp_buf.html"><span class="kw989">std::<span class="me2">jmp_buf</span></span></a> env, <span class="kw4">int</span> status <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
</tbody>
<tbody>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#21152;&#36733;&#20808;&#21069;&#30340; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#35843;&#29992;&#25152;&#20445;&#23384;&#30340;&#25191;&#34892;&#29615;&#22659; <code>env</code> &#12290;&#27492;&#20989;&#25968;&#19981;&#36820;&#22238;&#12290;&#25511;&#21046;&#34987;&#36716;&#31227;&#21040;&#35774;&#32622;&#20102; <code>env</code> &#30340;&#23439; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#30340;&#35843;&#29992;&#28857;&#12290;&#35813; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#38543;&#21518;&#36820;&#22238;&#20316;&#20026; <code>status</code> &#20256;&#36882;&#30340;&#20540;&#12290;</p>
<p>&#33509;&#35843;&#29992;&#20102; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#30340;&#20989;&#25968;&#24050;&#36864;&#20986;&#65292;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#65288;&#25442;&#35328;&#20043;&#65292;&#20165;&#20801;&#35768;&#22312;&#35843;&#29992;&#26632;&#21521;&#19978;&#38271;&#36339;&#65289;</p>
<p>&#19981;&#35843;&#29992;&#20219;&#20309;&#33258;&#21160;&#23545;&#35937;&#30340;&#26512;&#26500;&#20989;&#25968;&#12290;&#33509;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">throw</span></span></span> &#26367;&#25442; <code>std::longjmp</code> &#19988;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">catch</span></span></span> &#26367;&#25442; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#20250;&#25191;&#34892;&#20219;&#20309;&#33258;&#21160;&#23545;&#35937;&#30340;&#38750;&#24179;&#20961;&#26512;&#26500;&#20989;&#25968;&#65292;&#21017;&#36825;&#31181; <code>std::longjmp</code> &#30340;&#34892;&#20026;&#26410;&#23450;&#20041;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>env</td>
<td>-</td>
<td>&#25351;&#20195; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-program-setjmp.html"><span class="kw988">setjmp</span></a></span></span> &#25152;&#20445;&#23384;&#30340;&#20989;&#25968;&#25191;&#34892;&#29366;&#24577;&#30340;&#21464;&#37327;</td>
</tr>
<tr class="t-par">
<td>status</td>
<td>-</td>
<td>&#20174; <span class="t-lc"><a href="cpp-utility-program-setjmp.html">setjmp</a></span> &#36820;&#22238;&#30340;&#20540;&#12290;&#33509;&#23427;&#31561;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">&#8203;<span class="nu0">0</span>&#8203;</span></span> &#65292;&#21017;&#20197;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">1</span></span></span> &#20195;&#26367;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p><code>longjmp</code> &#26159; C &#20013;&#22788;&#29702;&#20989;&#25968;&#26080;&#27861;&#26377;&#24847;&#20041;&#36820;&#22238;&#22788;&#30340;&#38169;&#35823;&#26465;&#20214;&#30340;&#26426;&#21046;&#12290; C++ &#36890;&#24120;&#20026;&#27492;&#30446;&#30340;&#20351;&#29992;<a href="cpp-language-exceptions.html">&#24322;&#24120;&#22788;&#29702;</a>&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;csetjmp&gt;</span>
<a href="cpp-utility-program-jmp_buf.html"><span class="kw989">std::<span class="me2">jmp_buf</span></span></a> jump_buffer<span class="sy4">;</span>
<span class="br0">[</span><span class="br0">[</span>noreturn<span class="br0">]</span><span class="br0">]</span> <span class="kw4">void</span> a<span class="br0">(</span><span class="kw4">int</span> count<span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;a(&quot;</span> <span class="sy1">&lt;&lt;</span> count <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;) called<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">longjmp</span><span class="br0">(</span>jump_buffer, count<span class="sy2">+</span><span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// setjump() &#23558;&#36820;&#22238; count+1</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">volatile</span> <span class="kw4">int</span> count <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> <span class="co1">// &#24517;&#39035;&#20026; setjmp &#35774;&#23450;&#23616;&#37096;&#21464;&#37327;&#20026; volatile</span>
<span class="kw1">if</span> <span class="br0">(</span><a href="cpp-utility-program-setjmp.html"><span class="kw988">setjmp</span></a><span class="br0">(</span>jump_buffer<span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">9</span><span class="br0">)</span> <span class="br0">{</span>
a<span class="br0">(</span>count<span class="sy2">++</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// This will cause setjmp() to exit</span>
<span class="br0">}</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">a(0) called
a(1) called
a(2) called
a(3) called
a(4) called
a(5) called
a(6) called
a(7) called
a(8) called</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-utility-program-setjmp.html"><span class="t-lines"><span>setjmp</span></span></a></div>
</div>
</td>
<td>&#20445;&#23384;&#35821;&#22659;<br />
<span class="t-mark">(&#23439;&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>