记录技术和生活 Zola 2020-01-26T10:00:00+08:00 https://blog.laofu.online/tags/wang-luo/atom.xml 2020-01-26T10:00:00+08:00 2020-01-26T10:00:00+08:00 bigfish https://blog.laofu.online/blog/select-poll-epoll/

<p>在多路复用的IO的模型中，存在三种机制，分别是<code>select</code>，<code>poll</code>和<code>epoll</code>.为了便于理解，可以使用简单的伪代码来表示一个原始的IO的读写：</p> <pre class="giallo z-l-code z-d-code" ><code data-lang="java"><span class="giallo-l"><span class="z-l-13 z-d-8"> while</span><span>(</span><span class="z-l-2 z-d-2">true</span><span>)</span><span> </span></span> <span class="giallo-l"><span> {</span><span> </span></span> <span class="giallo-l"><span class="z-l-13 z-d-8"> for</span><span>(</span><span class="z-l-8">Stream</span><span class="z-l-3"> i</span><span class="z-l-13 z-d-8">:</span><span> streamArr</span><span>)</span><span> </span></span> <span class="giallo-l"><span> {</span><span> </span></span> <span class="giallo-l"><span class="z-l-13 z-d-8"> if</span><span>(</span><span class="z-l-3">i</span><span>.</span><span class="z-l-9 z-d-6">isNotReady</span><span>(</span><span>)</span><span>)</span><span>{</span></span> <span class="giallo-l"><span class="z-l-13 z-d-8"> continue</span><span>;</span></span> <span class="giallo-l"><span> }</span></span> <span class="giallo-l"><span class="z-l-9 z-d-6"> doSomething</span><span>(</span><span>)</span><span>;</span></span> <span class="giallo-l"><span> }</span><span> </span></span> <span class="giallo-l"><span> }</span><span> </span></span></code></pre>