klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
196e706fe41f737f31d8617ead8fe566aa616329
hustoj/web/cppreference-zh/chmhelp/cpp-atomic-atomic-operator_arith.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

155 lines
13 KiB
HTML
Raw Blame History

<!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::atomic&lt;T&gt;::operator++,++(int),--,--(int)</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_atomic_atomic_operator_arith 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::atomic&lt;T&gt;::</span>operator++,++<span style="font-size:0.7em; line-height:130%">(int)</span>,--,--<span style="font-size:0.7em; line-height:130%">(int)</span></h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-atomic.html">atomic</a>&lrm; | <a href="cpp-atomic-atomic.html">atomic</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-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(1)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;<i>Integral</i>&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy2">*</span> operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T<span class="sy2">*</span> operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(1)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;T*&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(2)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;<i>Integral</i>&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy2">*</span> operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T<span class="sy2">*</span> operator<span class="sy2">++</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(2)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;T*&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(3)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;<i>Integral</i>&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy2">*</span> operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T<span class="sy2">*</span> operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(3)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;T*&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T operator<span class="sy2">--</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T operator<span class="sy2">--</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(4)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;<i>Integral</i>&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy2">*</span> operator<span class="sy2">--</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
T<span class="sy2">*</span> operator<span class="sy2">--</span><span class="br0">(</span> <span class="kw4">int</span> <span class="br0">)</span> <span class="kw4">volatile</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(4)</td>
<td><span class="t-mark">(&#20165;&#20026; <code>atomic&lt;T*&gt;</code> &#27169;&#26495;&#29305;&#21270;&#30340;&#25104;&#21592;)</span><br />
<span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#21407;&#23376;&#22320;&#33258;&#22686;&#25110;&#33258;&#20943;&#24403;&#21069;&#20540;&#12290;&#25805;&#20316;&#20026;&#35835;-&#20462;&#25913;-&#20889;&#25805;&#20316;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#36827;&#34892;&#21407;&#23376;&#21069;&#33258;&#22686;&#12290;&#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">fetch_add<span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span><span class="sy2">+</span><span class="nu0">1</span></span></span> &#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#36827;&#34892;&#21407;&#23376;&#21518;&#33258;&#22686;&#12290;&#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">fetch_add<span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span></span></span> &#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> &#36827;&#34892;&#21407;&#23376;&#21069;&#33258;&#20943;&#12290;&#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">fetch_sub<span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span><span class="sy2">-</span><span class="nu0">1</span></span></span> &#12290;</div>
<div class="t-li1"><span class="t-li">4)</span> &#36827;&#34892;&#21407;&#23376;&#21518;&#33258;&#20943;&#12290;&#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi cpp source-cpp">fetch_sub<span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span></span></span> &#12290;</div>
<p>&#23545;&#20110;&#26377;&#31526;&#21495;&#25972;&#25968;&#31867;&#22411;&#65292;&#31639;&#26415;&#23450;&#20041;&#20026;&#20351;&#29992;&#34917;&#30721;&#34920;&#31034;&#12290;&#26080;&#26410;&#23450;&#20041;&#32467;&#26524;&#12290;&#23545;&#20110; <code>T*</code> &#31867;&#22411;&#65292;&#32467;&#26524;&#21487;&#33021;&#20026;&#26410;&#23450;&#20041;&#22320;&#22336;&#65292;&#20294;&#27492;&#22806;&#36825;&#20123;&#25805;&#20316;&#19981;&#20250;&#26377;&#26410;&#23450;&#20041;&#34892;&#20026;&#12290;</p>
<table class="t-rev-begin">
<tr class="t-rev t-since-cxx20">
<td>
<p>&#33509; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-atomic-atomic.html"><span class="kw2066">std::<span class="me2">atomic</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">is_always_lock_free</span></span></span> &#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> &#21017; volatile &#38480;&#23450;&#29256;&#26412;&#34987;&#24323;&#29992;&#12290;</p>
</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<div class="t-li1"><span class="t-li">1,3)</span> &#20462;&#25913;&#21518;&#30340;&#21407;&#23376;&#21464;&#37327;&#30340;&#20540;&#12290;&#27491;&#24335;&#22320;&#35828;&#65292; <code>*this</code> &#30340;<a href="cpp-atomic-memory_order.html#.E4.BF.AE.E6.94.B9.E9.A1.BA.E5.BA.8F">&#20462;&#25913;&#39034;&#24207;</a>&#20013;&#33258;&#22686;/&#33258;&#20943;&#20540;&#30340;&#32467;&#26524;&#31435;&#21363;&#21069;&#36235;&#20110;&#27492;&#20989;&#25968;&#30340;&#25928;&#26524;&#12290;</div>
<div class="t-li1"><span class="t-li">2,4)</span> &#20462;&#25913;&#21069;&#30340;&#21407;&#23376;&#21464;&#37327;&#30340;&#20540;&#12290;&#27491;&#24335;&#22320;&#35828;&#65292; <code>*this</code> &#30340;<a href="cpp-atomic-memory_order.html#.E4.BF.AE.E6.94.B9.E9.A1.BA.E5.BA.8F">&#20462;&#25913;&#39034;&#24207;</a>&#20013;&#20540;&#31435;&#21363;&#21069;&#36235;&#20110;&#27492;&#20989;&#25968;&#30340;&#25928;&#26524;&#12290;</div>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#19981;&#21516;&#20110;&#22823;&#22810;&#25968;&#21069;&#33258;&#22686;&#21644;&#33258;&#20943;&#36816;&#31639;&#31526;&#65292;&#21407;&#23376;&#31867;&#22411;&#30340;&#21069;&#33258;&#22686;&#21644;&#33258;&#20943;&#36816;&#31639;&#31526;&#19981;&#36820;&#22238;&#34987;&#20462;&#25913;&#23545;&#35937;&#30340;&#24341;&#29992;&#12290;&#23427;&#20204;&#26367;&#32780;&#36820;&#22238;&#23384;&#20648;&#20540;&#30340;&#21103;&#26412;&#12290;</p>
<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-atomic-atomic-fetch_add.html"><span class="t-lines"><span>fetch_add</span></span></a></div>
</div>
</td>
<td>&#21407;&#23376;&#22320;&#23558;&#21442;&#25968;&#21152;&#21040;&#23384;&#20648;&#20110;&#21407;&#23376;&#23545;&#35937;&#30340;&#20540;&#65292;&#24182;&#36820;&#22238;&#20808;&#21069;&#20445;&#26377;&#30340;&#20540;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-atomic-atomic-fetch_sub.html"><span class="t-lines"><span>fetch_sub</span></span></a></div>
</div>
</td>
<td>&#21407;&#23376;&#22320;&#20174;&#23384;&#20648;&#20110;&#21407;&#23376;&#23545;&#35937;&#30340;&#20540;&#20943;&#21435;&#21442;&#25968;&#65292;&#24182;&#33719;&#24471;&#20808;&#21069;&#20445;&#26377;&#30340;&#20540;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-atomic-atomic-operator_arith2.html"><span class="t-lines"><span>operator+=</span><span>operator-=</span><span>operator&amp;=</span><span>operator|=</span><span>operator^=</span></span></a></div>
</div>
</td>
<td>&#21152;&#12289;&#20943;&#65292;&#25110;&#19982;&#21407;&#23376;&#20540;&#36827;&#34892;&#36880;&#20301;&#19982;&#12289;&#25110;&#12289;&#24322;&#25110;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink