112 lines
5.8 KiB
HTML
112 lines
5.8 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>mtx_timedlock</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_thread_mtx_timedlock skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading">mtx_timedlock</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-thread.html">thread</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<table class="t-dcl-begin">
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<tbody>
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<tr class="t-dsc-header">
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<td>
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<div>定义于头文件 <code><threads.h></code></div>
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</td>
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<td></td>
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<td></td>
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</tr>
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<tr class="t-dcl t-since-c11">
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<td>
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<div><span class="mw-geshi c source-c"><span class="kw4">int</span> mtx_timedlock<span class="br0">(</span> <a href="c-thread.html"><span class="kw1011">mtx_t</span></a> <span class="sy2">*</span><span class="kw4">restrict</span> mutex,<br />
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<span class="kw4">const</span> <span class="kw1">struct</span> timespec <span class="sy2">*</span><span class="kw4">restrict</span> time_point <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-c11">(C11 起)</span></td>
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</tr>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<p>阻塞当前线程，直到 <code>mutex</code> 所指向的互斥被锁，或直到抵达 <code>time_point</code> 所指向的基于 <span class="t-c"><span class="mw-geshi c source-c">TIME_UTC</span></span> 的时间点。</p>
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<p>若当前线程已经锁定该互斥且该互斥非递归，则行为未定义。</p>
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<p>若该互斥不支持时限，则行为未定义。</p>
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<p>先前在同一互斥上对 <span class="t-lc"><a href="c-thread-mtx_unlock.html">mtx_unlock</a></span> 的调用<i>同步于</i>此操作（若此操作成功），而且任何给定的互斥上的所有锁定/解锁组成单独全序（类似原子对象上的修改顺序）。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<tr class="t-par">
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<td>mutex</td>
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<td>-</td>
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<td>指向要锁定的互斥的指针</td>
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</tr>
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<tr class="t-par">
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<td>time_point</td>
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<td>-</td>
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<td>指向要等待到的时限时间点的指针</td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>若成功则为 <span class="t-lc"><a href="c-thread-thrd_errors.html">thrd_success</a></span> ，若已在锁定互斥前抵达时限则为 <span class="t-c"><span class="mw-geshi c source-c">thrd_timedout</span></span> ，若出现错误则为 <span class="t-lc"><a href="c-thread-thrd_errors.html">thrd_error</a></span> 。</p>
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<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">引用</span></h3>
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<div class="t-ref-std-11">
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<ul>
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<li>C11 标准（ISO/IEC 9899:2011）：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li>7.26.4.4 The mtx_timedlock function (p: 381-382)</li>
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</ul>
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</dd>
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</dl>
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</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="c-thread-mtx_lock.html"><span class="t-lines"><span>mtx_lock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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</div>
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</td>
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<td>阻塞到锁定互斥为止<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="c-thread-mtx_trylock.html"><span class="t-lines"><span>mtx_trylock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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</div>
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</td>
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<td>锁定互斥，若已锁定则返回而不阻塞<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="c-thread-mtx_unlock.html"><span class="t-lines"><span>mtx_unlock</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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</div>
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</td>
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<td>解锁互斥<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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