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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>timespec_get</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-chrono.html">chrono</a>&lrm; | <a href="cpp-chrono-c.html">c</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-ctime.html">&lt;ctime&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> timespec_get<span class="br0">(</span> <a href="cpp-chrono-c-timespec.html"><span class="kw1024">std::<span class="me2">timespec</span></span></a><span class="sy2">*</span> ts, <span class="kw4">int</span> base <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="co2">#define TIME_UTC /* implementation-defined */</span></span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<div class="t-li1"><span class="t-li">1)</span> &#20462;&#25913; <code>ts</code> &#25152;&#25351;&#21521;&#30340; <span class="t-lc"><a href="cpp-chrono-c-timespec.html">std::timespec</a></span> &#23545;&#35937;&#65292;&#20197;&#20445;&#26377;&#26102;&#38388;&#22522;&#24213; <code>base</code> &#20013;&#30340;&#24403;&#21069;&#26085;&#21382;&#26102;&#38388;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#23637;&#24320;&#25104;&#36866;&#21512;&#29992;&#20316; <code>std::timespec_get</code> &#30340; <code>base</code> &#21442;&#25968;&#30340;&#20540;&#12290;</div>
<p>&#23454;&#29616;&#21487;&#25552;&#20379;&#20854;&#20182;&#20197; <code>TIME_</code> &#36215;&#22987;&#30340;&#23439;&#24120;&#37327;&#65292;&#20197;&#25351;&#31034;&#21478;&#22806;&#30340;&#26102;&#38388;&#22522;&#24213;&#12290;</p>
<p>&#33509; <code>base</code> &#20026; <code>TIME_UTC</code> &#65292;&#21017;</p>
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<li>&#35774; <code>ts-&gt;tv_sec</code> &#20026;&#20174;&#23454;&#29616;&#23450;&#20041;&#30340;&#32426;&#20803;&#24320;&#22987;&#30340;&#31186;&#25968;&#65292;&#25130;&#26029;&#21040;&#25972;&#25968;&#20540;</li>
<li>&#35774; <code>ts-&gt;tv_nsec</code> &#25104;&#21592;&#20026;&#32435;&#31186;&#30340;&#25972;&#25968;&#65292;&#21462;&#25972;&#21040;&#31995;&#32479;&#26102;&#38047;&#30340;&#20998;&#36776;&#29575;</li>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>&#25351;&#21521; <span class="t-lc"><a href="cpp-chrono-c-timespec.html">std::timespec</a></span> &#31867;&#22411;&#23545;&#35937;&#30340;&#25351;&#38024;</td>
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<td>base</td>
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<td><code>TIME_UTC</code> &#25110;&#21478;&#19968;&#25351;&#31034;&#26102;&#38388;&#22522;&#24213;&#30340;&#38750;&#38646;&#25972;&#25968;&#20540;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#33509;&#25104;&#21151;&#21017;&#20026; <code>base</code> &#30340;&#20540;&#65292;&#21542;&#21017;&#20026;&#38646;&#12290;</p>
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<p>POSIX &#20989;&#25968; <a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html">clock_gettime(CLOCK_REALTIME, ts)</a> &#20134;&#21487;&#29992;&#20110;&#23558;&#20174;&#32426;&#20803;&#24320;&#22987;&#30340;&#26102;&#38388;&#26893;&#20837; <code>std::timespec</code> &#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;cstdio&gt;</span>
<span class="co2">#include &lt;ctime&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-chrono-c-timespec.html"><span class="kw1024">std::<span class="me2">timespec</span></span></a> ts<span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">timespec_get</span><span class="br0">(</span><span class="sy3">&amp;</span>ts, TIME_UTC<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">char</span> buff<span class="br0">[</span><span class="nu0">100</span><span class="br0">]</span><span class="sy4">;</span>
<a href="cpp-chrono-c-strftime.html"><span class="kw1015">std::<span class="me2">strftime</span></span></a><span class="br0">(</span>buff, sizeof buff, <span class="st0">&quot;%D %T&quot;</span>, <a href="cpp-chrono-c-gmtime.html"><span class="kw1017">std::<span class="me2">gmtime</span></span></a><span class="br0">(</span><span class="sy3">&amp;</span>ts.<span class="me1">tv_sec</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-c-fprintf.html"><span class="kw1843">std::<span class="me2">printf</span></span></a><span class="br0">(</span><span class="st0">&quot;Current time: %s.%09ld UTC<span class="es1">\n</span>&quot;</span>, buff, ts.<span class="me1">tv_nsec</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">Current time: 06/24/16 20:07:42.949494132 UTC</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-chrono-c-timespec.html"><span class="t-lines"><span>timespec</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>&#20197;&#31186;&#21644;&#32435;&#31186;&#34920;&#31034;&#30340;&#26102;&#38388;<br />
<span class="t-mark">(&#32467;&#26500;&#20307;)</span></td>
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<div><a href="cpp-chrono-c-time.html"><span class="t-lines"><span>time</span></span></a></div>
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<td>&#36820;&#22238;&#33258;&#32426;&#20803;&#36215;&#35745;&#30340;&#31995;&#32479;&#24403;&#21069;&#26102;&#38388;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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