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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.eio-cancel" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>eio_cancel</refname>
<refpurpose>Cancels a request</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>void</type><methodname>eio_cancel</methodname>
<methodparam><type>resource</type><parameter>req</parameter></methodparam>
</methodsynopsis>
<para>
<function>eio_cancel</function> cancels a request specified by
<parameter>req</parameter>
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>req</parameter></term>
<listitem>
<para>
The request resource
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>pri</parameter></term>
<listitem>
&eio.request.pri.values;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>callback</parameter></term>
<listitem>
&eio.callback.proto;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
Arbitrary variable passed to <parameter>callback</parameter>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>eio_cancel</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
/* Is called when eio_nop() finished */
function my_nop_cb($data, $result) {
echo "my_nop ", $data, "\n";
}
// This eio_nop() call will be cancelled
$req = eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "1");
var_dump($req);
eio_cancel($req);
// This time eio_nop() will be processed
eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "2");
// Process requests
eio_event_loop();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
resource(4) of type (EIO Request Descriptor)
my_nop 2
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>eio_grp_cancel</function></member>
</simplelist>
</refsect1>
</refentry>
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sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
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sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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