<!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>Constructs the EvEmbed object</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.evembed.html">EvEmbed</a></div> <div class="next" style="text-align: right; float: right;"><a href="evembed.createstopped.html">EvEmbed::createStopped</a></div> <div class="up"><a href="class.evembed.html">EvEmbed</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="evembed.construct" class="refentry"> <div class="refnamediv"> <h1 class="refname">EvEmbed::__construct</h1> <p class="verinfo">(PECL ev >= 0.2.0)</p><p class="refpurpose"><span class="refname">EvEmbed::__construct</span> — <span class="dc-title">Constructs the EvEmbed object</span></p> </div> <div class="refsect1 description" id="refsect1-evembed.construct-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">public</span> <span class="methodname"><strong>EvEmbed::__construct</strong></span> ( <span class="methodparam"> <span class="type">object</span> <code class="parameter">$other</code> </span> [, <span class="methodparam"> <span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$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> <p class="para rdfs-comment"> This is a rather advanced watcher type that lets to embed one event loop into another(currently only IO events are supported in the embedded loop, other types of watchers might be handled in a delayed or incorrect fashion and must not be used). </p> <p class="para"> See <a href="http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_" class="link external">» the libev documentation</a> for details. </p> <p class="para"> This watcher is most useful on <em class="emphasis">BSD</em> systems without working <em>kqueue</em> to still be able to handle a large number of sockets. See example below. </p> </div> <div class="refsect1 parameters" id="refsect1-evembed.construct-parameters"> <h3 class="title">Parameters</h3> <dl> <dt> <span class="term"> <em><code class="parameter">other</code></em> </span> <dd> <p class="para"> Instance of <a href="class.evloop.html" class="classname">EvLoop</a> . The loop to embed, this loop must be embeddable(see <span class="methodname"><a href="ev.embeddablebackends.html" class="methodname">Ev::embeddableBackends()</a></span> ). </p> </dd> </dt> <dt> <span class="term"> <em><code class="parameter">callback</code></em> </span> <dd> <p class="para"> See <a href="ev.watcher-callbacks.html" class="link">Watcher callbacks</a> . </p> </dd> </dt> <dt> <span class="term"> <em><code class="parameter">data</code></em> </span> <dd> <p class="para"> Custom data associated with the watcher. </p> </dd> </dt> <dt> <span class="term"> <em><code class="parameter">priority</code></em> </span> <dd> <p class="para"> <a href="class.ev.html#ev.constants.watcher-pri" class="link">Watcher priority</a> </p> </dd> </dt> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-evembed.construct-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns EvEmbed object on success. </p> </div> <div class="refsect1 examples" id="refsect1-evembed.construct-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-3626"> <p><strong>Example #1 Embedding loop created with kqueue backend into the default loop</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/*<br /> * Check if kqueue is available but not recommended and create a kqueue backend<br /> * for use with sockets (which usually work with any kqueue implementation).<br /> * Store the kqueue/socket-only event loop in loop_socket. (One might optionally<br /> * use EVFLAG_NOENV, too)<br /> *<br /> * Example borrowed from<br /> * http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#Examples_CONTENT-9<br /> */<br /></span><span style="color: #0000BB">$loop </span><span style="color: #007700">= </span><span style="color: #0000BB">EvLoop</span><span style="color: #007700">::</span><span style="color: #0000BB">defaultLoop</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$socket_loop </span><span style="color: #007700">= </span><span style="color: #0000BB">NULL</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$embed </span><span style="color: #007700">= </span><span style="color: #0000BB">NULL</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">Ev</span><span style="color: #007700">::</span><span style="color: #0000BB">supportedBackends</span><span style="color: #007700">() & ~</span><span style="color: #0000BB">Ev</span><span style="color: #007700">::</span><span style="color: #0000BB">recommendedBackends</span><span style="color: #007700">() & </span><span style="color: #0000BB">Ev</span><span style="color: #007700">::</span><span style="color: #0000BB">BACKEND_KQUEUE</span><span style="color: #007700">) {<br /> if ((</span><span style="color: #0000BB">$socket_loop </span><span style="color: #007700">= new </span><span style="color: #0000BB">EvLoop</span><span style="color: #007700">(</span><span style="color: #0000BB">Ev</span><span style="color: #007700">::</span><span style="color: #0000BB">BACKEND_KQUEUE</span><span style="color: #007700">))) {<br /> </span><span style="color: #0000BB">$embed </span><span style="color: #007700">= new </span><span style="color: #0000BB">EvEmbed</span><span style="color: #007700">(</span><span style="color: #0000BB">$loop</span><span style="color: #007700">);<br /> }<br />}<br /><br />if (!</span><span style="color: #0000BB">$socket_loop</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$socket_loop </span><span style="color: #007700">= </span><span style="color: #0000BB">$loop</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// Now use $socket_loop for all sockets, and $loop for anything else<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </div> <div class="refsect1 seealso" id="refsect1-evembed.construct-seealso"> <h3 class="title">See Also</h3> <ul class="simplelist"> <li class="member"> <span class="methodname"><a href="ev.embeddablebackends.html" class="methodname" rel="rdfs-seeAlso">Ev::embeddableBackends()</a> - Returns the set of backends that are embeddable in other event loops.</span> </li> </ul> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.evembed.html">EvEmbed</a></div> <div class="next" style="text-align: right; float: right;"><a href="evembed.createstopped.html">EvEmbed::createStopped</a></div> <div class="up"><a href="class.evembed.html">EvEmbed</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>