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<title>std::this_thread::yield</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::this_thread::</span>yield</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></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-thread.html">&lt;thread&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> yield<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</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>&#25552;&#20379;&#25552;&#31034;&#32473;&#23454;&#29616;&#65292;&#20197;&#37325;&#35843;&#24230;&#32447;&#31243;&#30340;&#25191;&#34892;&#65292;&#20801;&#35768;&#20854;&#20182;&#32447;&#31243;&#36816;&#34892;&#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=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#27492;&#20989;&#25968;&#30340;&#20934;&#30830;&#24615;&#20026;&#20381;&#36182;&#20110;&#23454;&#29616;&#65292;&#29305;&#21035;&#26159;&#20351;&#29992;&#20013;&#30340; OS &#35843;&#24230;&#22120;&#26426;&#21046;&#21644;&#31995;&#32479;&#29366;&#24577;&#12290;&#20363;&#22914;&#65292;&#20808;&#36827;&#20808;&#20986;&#23454;&#26102;&#35843;&#24230;&#22120;&#65288; Linux &#30340; <code>SCHED_FIFO</code> &#65289;&#23558;&#24748;&#25346;&#24403;&#21069;&#32447;&#31243;&#24182;&#23558;&#23427;&#25918;&#21040;&#20934;&#22791;&#36816;&#34892;&#30340;&#21516;&#20248;&#20808;&#32423;&#32447;&#31243;&#30340;&#38431;&#21015;&#23614;&#65288;&#32780;&#33509;&#26080;&#20854;&#20182;&#32447;&#31243;&#22312;&#21516;&#20248;&#20808;&#32423;&#65292;&#21017; <code>yield</code> &#26080;&#25928;&#26524;&#65289;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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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="co1">// &#24314;&#35758;&#20854;&#20182;&#32447;&#31243;&#36816;&#34892;&#19968;&#23567;&#27573;&#26102;&#38388;&#30340;&ldquo;&#24537;&#30561;&#30496;&rdquo;</span>
<span class="kw4">void</span> little_sleep<span class="br0">(</span><a href="cpp-chrono-duration.html"><span class="kw995">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">microseconds</span></span></a> us<span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">auto</span> start <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">high_resolution_clock</span><span class="sy4">::</span><span class="me2">now</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span> end <span class="sy1">=</span> start <span class="sy2">+</span> us<span class="sy4">;</span>
<span class="kw1">do</span> <span class="br0">{</span>
std<span class="sy4">::</span><span class="me2">this_thread</span><span class="sy4">::</span><span class="me2">yield</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span> <span class="kw1">while</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">high_resolution_clock</span><span class="sy4">::</span><span class="me2">now</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;</span> end<span class="br0">)</span><span class="sy4">;</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">auto</span> start <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">high_resolution_clock</span><span class="sy4">::</span><span class="me2">now</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
little_sleep<span class="br0">(</span><a href="cpp-chrono-duration.html"><span class="kw995">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">microseconds</span></span></a><span class="br0">(</span><span class="nu0">100</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span> elapsed <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">high_resolution_clock</span><span class="sy4">::</span><span class="me2">now</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span> start<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> <span class="st0">&quot;waited for &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-chrono-duration-duration_cast.html"><span class="kw1000">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">duration_cast</span></span></a><span class="sy1">&lt;</span><a href="cpp-chrono-duration.html"><span class="kw995">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">microseconds</span></span></a><span class="sy1">&gt;</span><span class="br0">(</span>elapsed<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot; microseconds<span class="es1">\n</span>&quot;</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">waited for 128 microseconds</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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