84 lines
6.2 KiB
HTML
84 lines
6.2 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>tss_delete</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_tss_delete 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">tss_delete</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">void</span> tss_delete<span class="br0">(</span> <a href="c-thread.html"><span class="kw1034">tss_t</span></a> tss_id <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>销毁 <code>tss_id</code> 所标识的线程特定存储。</p>
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<p>若以 <span class="t-lc"><a href="c-thread-tss_create.html">tss_create</a></span> 注册了一个析构器，则不调用它（仅在线程退出时调用，无论是由 <span class="t-lc"><a href="c-thread-thrd_exit.html">thrd_exit</a></span> 还是通过从线程函数返回）。程序员负责确保在调用 <code>tss_delete</code> 前，每个知晓 <code>tss_id</code> 的线程都进行了必要的清理。</p>
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<p>若在另一线程执行 <code>tss_id</code> 的析构器时调用 <code>tss_delete</code> ，则这是否会更改关联析构器的调用次数是未指定的。</p>
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<p>若在调用方线程执行析构器时调用 <code>tss_delete</code> ，则与 <code>tss_id</code> 关联的析构器将不会在此线程上再次执行。</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>tss_id</td>
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<td>-</td>
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<td>先前 <span class="t-lc"><a href="c-thread-tss_create.html">tss_create</a></span> 所返回，且仍未被 <span class="t-lc"><strong class="selflink">tss_delete</strong></span> 删除的线程特定存储关键</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>（无）</p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p>此函数的 POSIX 等价版本是 <a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_key_delete.html">pthread_key_delete</a> 。</p>
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<p><code>tss_delete</code> 决不调用析构器，是因为正常情况下，有意令原先设置析构器所将处理的值（经由 <span class="t-lc"><a href="c-thread-tss_set.html">tss_set</a></span> ）的同一线程执行（线程退出时调用）析构器，而且析构器甚至可能依赖该线程所见的该值或其他线程特定数据。执行 <code>tss_delete</code> 的线程对其他线程的 TSS 无访问权限。即使可能对每个线程的与 <code>tss_id</code> 关联的值调用析构器，若仅为检验该线程中此 TSS 的值是否为空， <code>tss_delete</code> 也必须与每个线程同步（仅对非空值调用析构器）。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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<tr>
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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</tr>
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</table>
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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>7.26.6.2 The tss_delete function (p: 386)</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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</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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