<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>The EvChild class</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="evcheck.createstopped.html">EvCheck::createStopped</a></div> <div class="next" style="text-align: right; float: right;"><a href="evchild.construct.html">EvChild::__construct</a></div> <div class="up"><a href="book.ev.html">Ev</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="class.evchild" class="reference"> <h1 class="title">The EvChild class</h1> <div class="partintro"><p class="verinfo">(PECL ev >= 0.2.0)</p> <div class="section" id="evchild.intro"> <h2 class="title">Introduction</h2> <p class="para"> <strong class="classname">EvChild</strong> watchers trigger when the process receives a <strong><code>SIGCHLD</code></strong> in response to some child status changes (most typically when a child dies or exits). It is permissible to install an <strong><code>EvChild</code></strong> 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. </p> <p class="para"> It is allowed to register <strong class="classname">EvChild</strong> watchers in the <em class="emphasis">default loop</em> only. </p> </div> <div class="section" id="evchild.synopsis"> <h2 class="title">Class synopsis</h2> <div class="classsynopsis"> <div class="ooclass"> </div> <div class="classsynopsisinfo"> <span class="ooclass"> <strong class="classname">EvChild</strong> </span> <span class="ooclass"> <span class="modifier">extends</span> <a href="class.evwatcher.html" class="classname">EvWatcher</a> </span> {</div> <div class="classsynopsisinfo classsynopsisinfo_comment">/* Properties */</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evchild.html#evchild.props.pid">$<var class="varname">pid</var></a></var> ;</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evchild.html#evchild.props.rpid">$<var class="varname">rpid</var></a></var> ;</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evchild.html#evchild.props.rstatus">$<var class="varname">rstatus</var></a></var> ;</div> <div class="classsynopsisinfo classsynopsisinfo_comment">/* Inherited properties */</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evwatcher.html#evwatcher.props.is-active">$<var class="varname">is_active</var></a></var> ;</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evwatcher.html#evwatcher.props.data">$<var class="varname">data</var></a></var> ;</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evwatcher.html#evwatcher.props.is-pending">$<var class="varname">is_pending</var></a></var> ;</div> <div class="fieldsynopsis"> <span class="modifier">public</span> <var class="varname"><a href="class.evwatcher.html#evwatcher.props.priority">$<var class="varname">priority</var></a></var> ;</div> <div class="classsynopsisinfo classsynopsisinfo_comment">/* Methods */</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="methodname"><a href="evchild.construct.html" class="methodname">__construct</a></span> ( <span class="methodparam"> <span class="type">int</span> <code class="parameter">$pid</code> </span> , <span class="methodparam"> <span class="type">bool</span> <code class="parameter">$trace</code> </span> , <span class="methodparam"> <span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code> </span> [, <span class="methodparam"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$data</code> <span class="initializer"> = <strong><code>NULL</code></strong></span> </span> [, <span class="methodparam"> <span class="type">int</span> <code class="parameter">$priority</code> <span class="initializer"> = 0</span> </span> ]] )</div> <div class="methodsynopsis dc-description"> <span class="modifier">final</span> <span class="modifier">public</span> <span class="modifier">static</span> <span class="type">object</span> <span class="methodname"><a href="evchild.createstopped.html" class="methodname">createStopped</a></span> ( <span class="methodparam"> <span class="type">int</span> <code class="parameter">$pid</code> </span> , <span class="methodparam"> <span class="type">bool</span> <code class="parameter">$trace</code> </span> , <span class="methodparam"> <span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code> </span> [, <span class="methodparam"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$data</code> </span> [, <span class="methodparam"> <span class="type">int</span> <code class="parameter">$priority</code> </span> ]] )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evchild.set.html" class="methodname">set</a></span> ( <span class="methodparam"> <span class="type">int</span> <code class="parameter">$pid</code> </span> , <span class="methodparam"> <span class="type">bool</span> <code class="parameter">$trace</code> </span> )</div> <div class="classsynopsisinfo classsynopsisinfo_comment">/* Inherited methods */</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">int</span> <span class="methodname"><a href="evwatcher.clear.html" class="methodname">EvWatcher::clear</a></span> ( <span class="methodparam">void</span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">abstract</span> <span class="modifier">public</span> <span class="methodname"><a href="evwatcher.construct.html" class="methodname">EvWatcher::__construct</a></span> ( <span class="methodparam">void</span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evwatcher.feed.html" class="methodname">EvWatcher::feed</a></span> ( <span class="methodparam"> <span class="type">int</span> <code class="parameter">$revents</code> </span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">EvLoop</span> <span class="methodname"><a href="evwatcher.getloop.html" class="methodname">EvWatcher::getLoop</a></span> ( <span class="methodparam">void</span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evwatcher.invoke.html" class="methodname">EvWatcher::invoke</a></span> ( <span class="methodparam"> <span class="type">int</span> <code class="parameter">$revents</code> </span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><a href="evwatcher.keepalive.html" class="methodname">EvWatcher::keepalive</a></span> ([ <span class="methodparam"> <span class="type">bool</span> <code class="parameter">$value</code> </span> ] )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evwatcher.setcallback.html" class="methodname">EvWatcher::setCallback</a></span> ( <span class="methodparam"> <span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code> </span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evwatcher.start.html" class="methodname">EvWatcher::start</a></span> ( <span class="methodparam">void</span> )</div> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="evwatcher.stop.html" class="methodname">EvWatcher::stop</a></span> ( <span class="methodparam">void</span> )</div> }</div> </div> <div class="section" id="evchild.props"> <h2 class="title">Properties</h2> <dl> <dt id="evchild.props.pid"> <span class="term"> <var class="varname"><var class="varname">pid</var></var> </span> <dd> <p class="para"> <em class="emphasis">Readonly</em> . The process ID this watcher watches out for, or <strong><code>0</code></strong> , meaning any process ID. </p> </dd> </dt> <dt id="evchild.props.rpid"> <span class="term"> <var class="varname"><var class="varname">rpid</var></var> </span> <dd> <p class="para"> <em class="emphasis">Readonly</em> .The process ID that detected a status change. </p> </dd> </dt> <dt id="evchild.props.rstatus"> <span class="term"> <var class="varname"><var class="varname">rstatus</var></var> </span> <dd> <p class="para"> <em class="emphasis">Readonly</em> . The process exit status caused by <var class="varname"><var class="varname">rpid</var></var> . </p> </dd> </dt> </dl> </div> </div> <h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="evchild.construct.html">EvChild::__construct</a> — Constructs the EvChild watcher object</li><li><a href="evchild.createstopped.html">EvChild::createStopped</a> — Create instance of a stopped EvCheck watcher</li><li><a href="evchild.set.html">EvChild::set</a> — Configures the watcher</li></ul> </div> <hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="evcheck.createstopped.html">EvCheck::createStopped</a></div> <div class="next" style="text-align: right; float: right;"><a href="evchild.construct.html">EvChild::__construct</a></div> <div class="up"><a href="book.ev.html">Ev</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>