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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<reference xml:id="class.evchild" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The EvChild class</title>
<titleabbrev>EvChild</titleabbrev>
<partintro>
<!-- {{{ EvChild intro -->
<section xml:id="evchild.intro">
&reftitle.intro;
<para>
<classname>EvChild</classname>
watchers trigger when the process receives a
<constant>SIGCHLD</constant>
in response to some child status changes (most typically when a child dies
or exits). It is permissible to install an
<constant>EvChild</constant>
watcher after the child has been forked(which implies it might have
already exited), as long as the event loop isn't entered(or is continued
from a watcher), i.e. forking and then immediately registering a watcher
for the child is fine, but forking and registering a watcher a few event
loop iterations later or in the next callback invocation is not.
</para>
<para>
It is allowed to register
<classname>EvChild</classname>
watchers in the
<emphasis>default loop</emphasis>
only.
</para>
</section>
<!-- }}} -->
<section xml:id="evchild.synopsis">
&reftitle.classsynopsis;
<!-- {{{ Synopsis -->
<classsynopsis>
<ooclass>
<classname>EvChild</classname>
</ooclass>
<!-- {{{ Class synopsis -->
<classsynopsisinfo>
<ooclass>
<classname>EvChild</classname>
</ooclass>
<ooclass>
<modifier>extends</modifier>
<classname>EvWatcher</classname>
</ooclass>
</classsynopsisinfo>
<!-- }}} -->
<classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
<fieldsynopsis>
<modifier>public</modifier>
<varname linkend="evchild.props.pid">pid</varname>
</fieldsynopsis>
<fieldsynopsis>
<modifier>public</modifier>
<varname linkend="evchild.props.rpid">rpid</varname>
</fieldsynopsis>
<fieldsynopsis>
<modifier>public</modifier>
<varname linkend="evchild.props.rstatus">rstatus</varname>
</fieldsynopsis>
<classsynopsisinfo role="comment">&InheritedProperties;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('evwatcher.synopsis')/descendant::db:fieldsynopsis)" />
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evchild')/db:refentry/db:refsect1[@role='description']/descendant::db:constructorsynopsis[not(@role='procedural')])"/>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evchild')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[not(@role='procedural')])"/>
<classsynopsisinfo role="comment">&InheritedMethods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evwatcher')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
</classsynopsis>
<!-- }}} -->
</section>
<!-- {{{ EvChild properties -->
<section xml:id="evchild.props">
&reftitle.properties;
<variablelist>
<varlistentry xml:id="evchild.props.pid">
<term>
<varname>pid</varname>
</term>
<listitem>
<para>
<emphasis>Readonly</emphasis>
. The process ID this watcher watches out for, or
<literal>0</literal>
, meaning any process ID.
</para>
</listitem>
</varlistentry>
<varlistentry xml:id="evchild.props.rpid">
<term>
<varname>rpid</varname>
</term>
<listitem>
<para>
<emphasis>Readonly</emphasis>
.The process ID that detected a status change.
</para>
</listitem>
</varlistentry>
<varlistentry xml:id="evchild.props.rstatus">
<term>
<varname>rstatus</varname>
</term>
<listitem>
<para>
<emphasis>Readonly</emphasis>
. The process exit status caused by
<varname>rpid</varname>
.
</para>
</listitem>
</varlistentry>
</variablelist>
</section>
<!-- }}} -->
</partintro>
&reference.ev.entities.evchild;
</reference>
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-->
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