89 lines
4.1 KiB
HTML
89 lines
4.1 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>cnd_wait</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_cnd_wait 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">cnd_wait</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 class="t-dcl t-since-c11">
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<div><span class="mw-geshi c source-c"><span class="kw4">int</span> cnd_wait<span class="br0">(</span> <a href="c-thread.html"><span class="kw1025">cnd_t</span></a><span class="sy2">*</span> cond, <a href="c-thread.html"><span class="kw1011">mtx_t</span></a><span class="sy2">*</span> mutex <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 class="t-dcl-sep">
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<td></td>
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<p>原子地解锁 <code>mutex</code> 所指向的互斥，并在 <code>cond</code> 所指向的条件变量上阻塞，直至线程被 <span class="t-lc"><a href="c-thread-cnd_signal.html">cnd_signal</a></span> 或 <span class="t-lc"><a href="c-thread-cnd_broadcast.html">cnd_broadcast</a></span> 发信号，或直至虚假唤醒出现。在此函数返回前，重新锁定该互斥。</p>
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<p>若调用方线程未锁定该互斥，则行为未定义。</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>cond</td>
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<td>-</td>
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<td>指向要在上面阻塞的条件变量的指针</td>
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</tr>
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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>指向要在阻塞期解锁的互斥的指针</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> ，否则为 <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>7.26.3.6 The cnd_wait function (p: 380)</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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<div class="t-dsc-member-div">
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<div><a href="c-thread-cnd_timedwait.html"><span class="t-lines"><span>cnd_timedwait</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>在条件变量上阻塞一段时长<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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</body>
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</html>
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