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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="syncreaderwriter.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>SyncReaderWriter::__construct</refname>
<refpurpose>Constructs a new SyncReaderWriter object</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier> <methodname>SyncReaderWriter::__construct</methodname>
<methodparam choice="opt"><type>string</type><parameter>name</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>autounlock</parameter><initializer>1</initializer></methodparam>
</methodsynopsis>
<para>
Constructs a named or unnamed reader-writer object.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>name</parameter></term>
<listitem>
<para>
The name of the reader-writer if this is a named reader-writer object.
</para>
<note>
<para>
If the name already exists, it must be able to be opened by the current user
that the process is running as or an exception will be thrown with a meaningless
error message.
</para>
</note>
<note>
<simpara>
On Windows, <parameter>name</parameter> must not contain backslashes.
</simpara>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>autounlock</parameter></term>
<listitem>
<para>
Specifies whether or not to automatically unlock the reader-writer at the
conclusion of the PHP script.
</para>
<warning>
<para>
If an object is: A named reader-writer with an autounlock of FALSE, the
object is locked for either reading or writing, and the PHP script concludes
before the object is unlocked, then the underlying objects will end up in an
inconsistent state.
</para>
</warning>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The new <classname>SyncReaderWriter</classname> object.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
An exception is thrown if the reader-writer cannot be created or opened.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>SyncReaderWriter::__construct</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->readlock();
/* ... */
$readwrite->readunlock();
$readwrite->writelock();
/* ... */
$readwrite->writeunlock();
?>
]]>
</programlisting>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><methodname>SyncReaderWriter::readlock</methodname></member>
<member><methodname>SyncReaderWriter::readunlock</methodname></member>
<member><methodname>SyncReaderWriter::writelock</methodname></member>
<member><methodname>SyncReaderWriter::writeunlock</methodname></member>
</simplelist>
</refsect1>
</refentry>
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