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<title>Returns the set of backends supported by current libev
configuration.</title>
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<h1 class="refname">Ev::supportedBackends</h1>
<p class="verinfo">(PECL ev >= 0.2.0)</p><p class="refpurpose"><span class="refname">Ev::supportedBackends</span> — <span class="dc-title">Returns the set of backends supported by current libev
configuration.</span></p>
</div>
<div class="refsect1 description" id="refsect1-ev.supportedbackends-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">final</span>
<span class="modifier">public</span>
<span class="modifier">static</span>
<span class="type"><span class="type void">void</span></span>
<span class="methodname"><strong>Ev::supportedBackends</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
Returns the set of backends supported by current libev configuration.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-ev.supportedbackends-parameters">
<h3 class="title">Parameters</h3>
<p class="para">This function has no parameters.</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-ev.supportedbackends-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a bit mask which can containing
<a href="class.ev.html#ev.constants.watcher-backends" class="link">backend flags</a>
combined using bitwise
<em class="emphasis">OR</em>
operator.
</p>
</div>
<div class="refsect1 examples" id="refsect1-ev.supportedbackends-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-3625">
<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-ev.supportedbackends-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member">
<a href="class.evembed.html" class="classname">EvEmbed</a>
</li>
<li class="member">
<span class="methodname"><a href="ev.recommendedbackends.html" class="methodname" rel="rdfs-seeAlso">Ev::recommendedBackends()</a> - Returns a bit mask of recommended backends for current
platform.</span>
</li>
<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>
<li class="member">
<a href="class.ev.html#ev.constants.watcher-backends" class="link">Backend flags</a>
</li>
<li class="member">
<a href="ev.examples.html" class="link">Examples</a>
</li>
</ul>
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