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archived-doc-zh/reference/pthreads/pool/construct.xml

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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="pool.construct">
<refnamediv>
<refname>Pool::__construct</refname>
<refpurpose>创建新的 Worker 对象池</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<constructorsynopsis>
<modifier>public</modifier> <methodname>Pool::__construct</methodname>
<methodparam><type>int</type><parameter>size</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>class</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter>ctor</parameter></methodparam>
</constructorsynopsis>
<para>
创建新的 Worker 对象池,但是所对应的线程是延迟创建的的,也就是说,
直到需要执行任务的时候
才会创建对应的线程。
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>size</parameter></term>
<listitem>
<para>
此 Pool 对象可创建的 Worker 对象的最大数量
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>class</parameter></term>
<listitem>
<para>
新创建的 Worker 对象的类。
如果不指定类,那么会使用默认的 <classname>Worker</classname> 类。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>ctor</parameter></term>
<listitem>
<para>
创建 Worker 对象时所用到的参数,以数组方式传入
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title>创建 Pool 对象</title>
<programlisting role="php">
<![CDATA[
<?php
class MyWorker extends Worker {
public function __construct(Something $something) {
$this->something = $something;
}
public function run() {
/** ... **/
}
}
$pool = new Pool(8, \MyWorker::class, [new Something()]);
var_dump($pool);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
object(Pool)#1 (6) {
["size":protected]=>
int(8)
["class":protected]=>
string(8) "MyWorker"
["workers":protected]=>
NULL
["work":protected]=>
NULL
["ctor":protected]=>
array(1) {
[0]=>
object(Something)#2 (0) {
}
}
["last":protected]=>
int(0)
}
]]>
</screen>
</example>
</refsect1>
</refentry>
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