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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::mutex::</span>unlock</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-thread.html">thread</a>&lrm; | <a href="cpp-thread-mutex.html">mutex</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#35299;&#38145;&#20114;&#26021;&#12290;</p>
<p>&#20114;&#26021;&#24517;&#39035;&#20026;&#24403;&#21069;&#25191;&#34892;&#32447;&#31243;&#25152;&#38145;&#23450;&#65292;&#21542;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#12290;</p>
<p>&#27492;&#25805;&#20316;<i>&#21516;&#27493;&#20110;</i>&#65288;&#23450;&#20041;&#20110; <span class="t-lc"><a href="cpp-atomic-memory_order.html">std::memory_order</a></span> &#65289;&#20219;&#20309;&#21518;&#32487;&#30340;&#21462;&#24471;&#21516;&#19968;&#20114;&#26021;&#25152;&#26377;&#26435;&#30340;&#38145;&#25805;&#20316;&#12290;</p>
<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>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
<p>&#19981;&#25243;&#20986;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#36890;&#24120;&#19981;&#30452;&#25509;&#35843;&#29992; <code>unlock()</code> &#65306;&#29992; <span class="t-lc"><a href="cpp-thread-unique_lock.html">std::unique_lock</a></span> &#19982; <span class="t-lc"><a href="cpp-thread-lock_guard.html">std::lock_guard</a></span> &#31649;&#29702;&#20114;&#26021;&#38145;&#23450;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<p>&#27492;&#31034;&#20363;&#28436;&#31034; <code>lock</code> &#19982; <code>unlock</code> &#33021;&#22914;&#20309;&#20445;&#25252;&#20849;&#20139;&#25968;&#25454;&#12290;</p>
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<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;chrono&gt;</span>
<span class="co2">#include &lt;thread&gt;</span>
<span class="co2">#include &lt;mutex&gt;</span>
<span class="kw4">int</span> g_num <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> <span class="co1">// &#20026; g_num_mutex &#25152;&#20445;&#25252;</span>
<a href="cpp-thread-mutex.html"><span class="kw2154">std::<span class="me2">mutex</span></span></a> g_num_mutex<span class="sy4">;</span>
<span class="kw4">void</span> slow_increment<span class="br0">(</span><span class="kw4">int</span> id<span class="br0">)</span>
<span class="br0">{</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> i <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> i <span class="sy1">&lt;</span> <span class="nu0">3</span><span class="sy4">;</span> <span class="sy2">++</span>i<span class="br0">)</span> <span class="br0">{</span>
g_num_mutex.<span class="me1">lock</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="sy2">++</span>g_num<span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> id <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; =&gt; &quot;</span> <span class="sy1">&lt;&lt;</span> g_num <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
g_num_mutex.<span class="me1">unlock</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-thread-sleep_for.html"><span class="kw2149">std::<span class="me2">this_thread</span><span class="sy4">::</span><span class="me2">sleep_for</span></span></a><span class="br0">(</span><a href="cpp-chrono-duration.html"><span class="kw997">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">seconds</span></span></a><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-thread-thread.html"><span class="kw2146">std::<span class="me2">thread</span></span></a> t1<span class="br0">(</span>slow_increment, <span class="nu0">0</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-thread-thread.html"><span class="kw2146">std::<span class="me2">thread</span></span></a> t2<span class="br0">(</span>slow_increment, <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
t1.<span class="me1">join</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
t2.<span class="me1">join</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">0 =&gt; 1
1 =&gt; 2
0 =&gt; 3
1 =&gt; 4
0 =&gt; 5
1 =&gt; 6</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-thread-mutex-lock.html"><span class="t-lines"><span>lock</span></span></a></div>
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<td>&#38145;&#23450;&#20114;&#26021;&#65292;&#33509;&#20114;&#26021;&#19981;&#21487;&#29992;&#21017;&#38459;&#22622;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-thread-mutex-try_lock.html"><span class="t-lines"><span>try_lock</span></span></a></div>
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<td>&#23581;&#35797;&#38145;&#23450;&#20114;&#26021;&#65292;&#33509;&#20114;&#26021;&#19981;&#21487;&#29992;&#21017;&#36820;&#22238;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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