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<title>timespec_getres</title>
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<h1 id="firstHeading" class="firstHeading">timespec_getres</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-chrono.html">chrono</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;time.h&gt;</code></div>
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<div><span class="mw-geshi c source-c"><span class="kw4">int</span> timespec_getres<span class="br0">(</span> <span class="kw1">struct</span> timespec <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><span class="t-mark-rev t-since-c23">(C23 &#36215;)</span></td>
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<p>&#33509; <code>ts</code> &#20026;&#38750;&#31354;&#19988; <span class="t-lc">timespec_get</span> &#25903;&#25345; <code>base</code> &#65292;&#21017;&#20462;&#25913; <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>ts</span></span> &#20197;&#20445;&#26377; <span class="t-lc">timespec_get</span> &#23545; <code>base</code> &#25552;&#20379;&#30340;&#26102;&#38388;&#30340;&#35299;&#26512;&#24230;&#12290;&#23545;&#27599;&#20010;&#25903;&#25345;&#30340; <code>base</code> &#65292;&#21516;&#19968;&#27425;&#31243;&#24207;&#25191;&#34892;&#26399;&#38388;&#22810;&#27425;&#35843;&#29992; <code>timespec_getres</code> &#25317;&#26377;&#31561;&#21516;&#30340;&#32467;&#26524;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>ts</td>
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<td>&#25351;&#21521; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw1">struct</span> timespec</span></span> &#31867;&#22411;&#23545;&#35937;&#30340;&#25351;&#38024;</td>
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<td>base</td>
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<td><span class="t-lc">TIME_UTC</span> &#25110;&#21478;&#19968;&#25351;&#31034;&#26102;&#38388;&#22522;&#24213;&#30340;&#38750;&#38646;&#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;&#25903;&#25345; <code>base</code> &#21017;&#20026; <code>base</code> &#30340;&#20540;&#65292;&#21542;&#21017;&#20026;&#38646;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>POSIX &#20989;&#25968; <a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html"><code>clock_getres(clock_id, ts)</code></a> &#20134;&#21487;&#29992;&#20110;&#20197; <code>clock_id</code> &#25152;&#26631;&#35782;&#30340;&#26102;&#38388;&#30340;&#35299;&#26512;&#24230;&#22635;&#20805; <span class="t-lc">timespec</span> &#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
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<pre class="de1"><span class="co2">#include &lt;stdio.h&gt;</span>
<span class="co2">#include &lt;time.h&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">char</span> buff<span class="br0">[</span><span class="nu0">128</span><span class="br0">]</span><span class="sy4">;</span>
<span class="kw1">struct</span> timespec ts<span class="sy4">;</span>
<span class="kw4">const</span> <span class="kw4">int</span> res <span class="sy1">=</span> timespec_getres<span class="br0">(</span><span class="sy3">&amp;</span>ts, TIME_UTC<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>res <span class="sy1">==</span> TIME_UTC<span class="br0">)</span> <span class="br0">{</span>
<span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw523">tm</span></a> timer<span class="sy4">;</span>
<a href="c-chrono-strftime.html"><span class="kw517">strftime</span></a><span class="br0">(</span>buff, <span class="kw4">sizeof</span> buff, <span class="st0">&quot;%D %T&quot;</span>, gmtime_r<span class="br0">(</span><span class="sy3">&amp;</span>ts.<span class="me1">tv_sec</span>, <span class="sy3">&amp;</span>timer<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;Time resolution info: %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> <span class="kw1">else</span> <span class="br0">{</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;TIME_UTC base is not supported.&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</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">Time resolution info: 01/01/70 00:00:00.000000001 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="c-chrono-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-c11">(C11)</span></span></span></div>
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<td>&#21333;&#20301;&#20026;&#31186;&#21644;&#32435;&#31186;&#30340;&#26102;&#38388;<br />
<span class="t-mark">(&#32467;&#26500;&#20307;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="c-chrono-timespec_get.html"><span class="t-lines"><span>timespec_get</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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<td>&#36820;&#22238;&#22522;&#20110;&#32473;&#23450;&#26102;&#38388;&#22522;&#24213;&#30340;&#26085;&#21382;&#26102;&#38388;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="c-chrono-time.html"><span class="t-lines"><span>time</span></span></a></div>
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<td>&#36820;&#22238;&#32426;&#20803;&#24320;&#22987;&#32463;&#36807;&#30340;&#24403;&#21069;&#31995;&#32479;&#26085;&#21382;&#26102;&#38388;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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