143 lines
9.0 KiB
HTML
143 lines
9.0 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>thrd_create</title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_thread_thrd_create skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading">thrd_create</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-thread.html">thread</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<table class="t-dcl-begin">
|
|
<tbody>
|
|
<tr class="t-dsc-header">
|
|
<td>
|
|
<div>定义于头文件 <code><threads.h></code></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-c11">
|
|
<td>
|
|
<div><span class="mw-geshi c source-c"><span class="kw4">int</span> thrd_create<span class="br0">(</span> <a href="c-thread.html"><span class="kw996">thrd_t</span></a> <span class="sy2">*</span>thr, <a href="c-thread.html"><span class="kw1009">thrd_start_t</span></a> func, <span class="kw4">void</span> <span class="sy2">*</span>arg <span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td class="t-dcl-nopad"></td>
|
|
<td><span class="t-mark-rev t-since-c11">(C11 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>创建一个执行函数 <code>func</code> 的新线程，以 <span class="t-c"><span class="mw-geshi c source-c">func<span class="br0">(</span>arg<span class="br0">)</span></span></span> 调用此函数。</p>
|
|
<p>若成功，则设置 <code>thr</code> 所指向的对象为新线程的标识符。</p>
|
|
<p>此函数的完成<i>同步于</i>线程的开始。</p>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
|
|
<table class="t-par-begin">
|
|
<tr class="t-par">
|
|
<td>thr</td>
|
|
<td>-</td>
|
|
<td>指向放置新线程标识符的内存位置的指针</td>
|
|
</tr>
|
|
<tr class="t-par">
|
|
<td>func</td>
|
|
<td>-</td>
|
|
<td>要执行的函数</td>
|
|
</tr>
|
|
<tr class="t-par">
|
|
<td>arg</td>
|
|
<td>-</td>
|
|
<td>传递给函数的参数</td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
|
|
<p>若新线程创建成功则为 <span class="t-lc"><a href="c-thread-thrd_errors.html">thrd_success</a></span> 。否则若内存不足则返回 <span class="t-lc"><a href="c-thread-thrd_errors.html">thrd_nomem</a></span> ，若出现其他错误则返回 <code>thrd_error</code> 。</p>
|
|
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
|
|
<p>一旦线程完结并融合或脱附，则可能重新使用线程标识符。</p>
|
|
<p>类型 <code>thrd_start_t</code> 是 <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">int</span><span class="br0">(</span><span class="sy2">*</span><span class="br0">)</span><span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span><span class="br0">)</span></span></span> 的 typedef ，有别于 POSIX 的等价版本 <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">void</span><span class="sy2">*</span><span class="br0">(</span><span class="sy2">*</span><span class="br0">)</span><span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span><span class="br0">)</span></span></span> 。</p>
|
|
<p>将所有所有线程特定存储值（见 <span class="t-lc"><a href="c-thread-tss_create.html">tss_create</a></span> ）初始化为 <span class="t-lc"><a href="c-types-NULL.html">NULL</a></span> 。</p>
|
|
<p>从函数 <code>func</code> 返回等价于以等于 <code>func</code> 返回值的参数调用 <span class="t-lc"><a href="c-thread-thrd_exit.html">thrd_exit</a></span> 。</p>
|
|
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
|
|
<div class="t-example">
|
|
<div class="t-example-live-link"></div>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="c source-c">
|
|
<pre class="de1"><span class="co2">#include<stdio.h></span>
|
|
<span class="co2">#include<assert.h></span>
|
|
<span class="co2">#include<threads.h></span>
|
|
|
|
<span class="kw4">int</span> hello_word_thrd_fn<span class="br0">(</span><span class="kw4">void</span> <span class="sy2">*</span>arg<span class="br0">)</span><span class="br0">{</span>
|
|
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">"%lu, %s<span class="es1">\n</span>"</span>, <a href="c-thread-thrd_current.html"><span class="kw998">thrd_current</span></a><span class="br0">(</span><span class="br0">)</span>, __func__<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="br0">}</span>
|
|
|
|
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span><span class="br0">{</span>
|
|
<a href="c-thread.html"><span class="kw996">thrd_t</span></a> th<span class="sy4">;</span>
|
|
<span class="kw4">int</span> status <span class="sy1">=</span> thrd_create<span class="br0">(</span><span class="sy3">&</span>th, hello_word_thrd_fn, <a href="c-types-NULL.html"><span class="kw103">NULL</span></a><span class="br0">)</span><span class="sy4">;</span>
|
|
<a href="c-error-assert.html"><span class="kw407">assert</span></a><span class="br0">(</span><span class="br0">(</span><span class="st0">"hello word thrd create error!!<span class="es1">\n</span>"</span>, status <span class="sy1">==</span> <a href="c-thread-thrd_errors.html"><span class="kw1004">thrd_success</span></a><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
|
|
|
|
<a href="c-thread-thrd_join.html"><span class="kw1003">thrd_join</span></a><span class="br0">(</span>th, <a href="c-types-NULL.html"><span class="kw103">NULL</span></a><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">"%lu, %s<span class="es1">\n</span>"</span>, <a href="c-thread-thrd_current.html"><span class="kw998">thrd_current</span></a><span class="br0">(</span><span class="br0">)</span>, __func__<span class="br0">)</span><span class="sy4">;</span>
|
|
<span class="br0">}</span>
|
|
|
|
<span class="coMULTI">/* 如果你尝试用 gcc 编译，记得链接线程库
|
|
gcc xx.c -o xx -lpthread
|
|
*/</span></pre></div>
|
|
</div>
|
|
<p>输出：</p>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="text source-text">
|
|
<pre class="de1">139833338058304, hello_word_thrd_fn
|
|
139833338062656, main</pre></div>
|
|
</div>
|
|
</div>
|
|
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">引用</span></h3>
|
|
<div class="t-ref-std-11">
|
|
<ul>
|
|
<li>C11 标准（ISO/IEC 9899:2011）：</li>
|
|
</ul>
|
|
<dl>
|
|
<dd>
|
|
<ul>
|
|
<li>7.26.5.1 The thrd_create function (p: 383)</li>
|
|
</ul>
|
|
</dd>
|
|
</dl>
|
|
</div>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="c-thread-thrd_detach.html"><span class="t-lines"><span>thrd_detach</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>分离线程<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="c-thread-thrd_join.html"><span class="t-lines"><span>thrd_join</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>阻塞到线程终止为止<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|