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89 lines
3.5 KiB
HTML
89 lines
3.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>获取任意进程的优先级</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.pcntl-getpriority" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pcntl_getpriority</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pcntl_getpriority</span> — <span class="dc-title">获取任意进程的优先级</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pcntl-getpriority-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>pcntl_getpriority</strong></span>
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([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$pid</code><span class="initializer"> = getmypid()</span></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$process_identifier</code><span class="initializer"> = PRIO_PROCESS</span></span>
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]] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pcntl_getpriority()</strong></span> 获取进程号为
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<code class="parameter">pid</code>的进程的优先级。由于不同的系统类型以及内核版本下
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优先级可能不同，因此请参考您系统的getpriority（2）手册以获取详细的规范。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pcntl-getpriority-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">pid</code></dt>
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<dd>
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<p class="para">
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如果没有指定，默认是当前进程的进程号。
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</p>
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</dd>
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<dt>
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<code class="parameter">process_identifier</code></dt>
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<dd>
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<p class="para">
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<strong><code>PRIO_PGRP</code></strong>（译注：获取进程组优先级）, <strong><code>PRIO_USER</code></strong>
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（译注：获取用户进程优先级）或 <strong><code>PRIO_PROCESS（译注：默认值;获取进程优先级）</code></strong>三者之一。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.pcntl-getpriority-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<span class="function"><strong>pcntl_getpriority()</strong></span> 返回进程的优先级或在错误时返回 <strong><code>FALSE</code></strong> 。 值越小代表优先级越高。
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</p>
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<div class="warning"><strong class="warning">Warning</strong><p class="simpara">此函数可能返回布尔值
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<strong><code>FALSE</code></strong>，但也可能返回等同于 <strong><code>FALSE</code></strong> 的非布尔值。请阅读 <a href="language.types.boolean.html" class="link">布尔类型</a>章节以获取更多信息。应使用
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<a href="language.operators.comparison.html" class="link">===
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运算符</a>来测试此函数的返回值。</p></div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.pcntl-getpriority-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="pcntl_setpriority.html" class="function" rel="rdfs-seeAlso">pcntl_setpriority()</a> - 修改任意进程的优先级</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |