摘要:本文主要向大家介绍了 C/C++知识点之C语言多线程目录操作,通过具体的内容向大家展示,希望对大家学习C/C++知识点有所帮助。
本文主要向大家介绍了 C/C++知识点之C语言多线程目录操作,通过具体的内容向大家展示,希望对大家学习C/C++知识点有所帮助。
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<p>#include <stdio.h><br>#include <pthread.h><br>#include <stdlib.h><br>#include <sys/types.h><br>#include <dirent.h></p>
<p>#define NUM 2</p>
<p>void thread(void <em> arg)<br>{<br>int i;<br>DIR </em>dir = NULL;<br>struct dirent <em>ptr = (struct dirent </em>)calloc(1, sizeof(struct dirent));<br>struct dirent *result = NULL;</p>
<pre><code class="hljs perl"><span class="hljs-keyword">for</span> (i=<span class="hljs-number">0</span>;i<<span class="hljs-number">1</span>;i++) {
<span class="hljs-keyword">printf</span> (<span class="hljs-string">"in thread:%d\n"</span>, (<span class="hljs-keyword">int</span>)arg);
dir = <span class="hljs-keyword">opendir</span>(<span class="hljs-string">"/root/tmp"</span>);
<span class="hljs-keyword">if</span> (!dir) {
<span class="hljs-keyword">printf</span>(<span class="hljs-string">"opendir failed\n"</span>);
}
<span class="hljs-keyword">while</span> ((readdir_r(dir, ptr, &result)==<span class="hljs-number">0</span>) && (result != NULL)) {
<span class="hljs-keyword">printf</span>(<span class="hljs-string">"name:%s "</span>, result->d_name);
}
<span class="hljs-keyword">printf</span> (<span class="hljs-string">"\n"</span>);
closedir(dir);
<span class="hljs-keyword">sleep</span> (<span class="hljs-number">1</span>);
}</code></pre>
<p>}</p>
<p>int main(void)<br>{<br>pthread_t id[NUM];<br>int i,ret;</p>
<pre><code class="hljs objectivec"><span class="hljs-keyword">for</span> (i=<span class="hljs-number">0</span>;i<NUM;i++) {
ret = pthread_create(&<span class="hljs-keyword">id</span>[i], <span class="hljs-literal">NULL</span>, (<span class="hljs-keyword">void</span> *)thread, (<span class="hljs-keyword">void</span> *)i);
<span class="hljs-keyword">if</span> (ret) {
printf(<span class="hljs-string">"create pthread error\n"</span>);
<span class="hljs-keyword">return</span> <span class="hljs-number">1</span>;
}
}
<span class="hljs-keyword">for</span> (i=<span class="hljs-number">0</span>;i<NUM;i++) {
pthread_detach(<span class="hljs-keyword">id</span>[i]);
}
<span class="hljs-keyword">while</span> (<span class="hljs-number">1</span>);
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;</code></pre>
<p>}</p>
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