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<title>Can be to be called whenever there are pending requests that need finishing.</title>
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</div><hr /><div id="function.eio-poll" class="refentry">
<div class="refnamediv">
<h1 class="refname">eio_poll</h1>
<p class="verinfo">(PECL eio >= 0.0.1dev)</p><p class="refpurpose"><span class="refname">eio_poll</span> — <span class="dc-title">Can be to be called whenever there are pending requests that need finishing.</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.eio-poll-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>eio_poll</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>eio_poll()</strong></span> can be used to implement special event loop.
For this <span class="function"><a href="function.eio-nreqs.html" class="function">eio_nreqs()</a></span> could be used to test if there are
unprocessed requests.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>: <p class="para">Applicable only when implementing userspace event loop.</p></p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.eio-poll-parameters">
<h3 class="title">Parameters</h3>
<p class="para">This function has no parameters.</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.eio-poll-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
If any request invocation returns a non-zero value, returns that value.
Otherwise, it returns <strong><code>0</code></strong>.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.eio-poll-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-3600">
<p><strong>Example #1 <span class="function"><strong>eio_poll()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">res_cb</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"1"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"2"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"3"</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">eio_nreqs</span><span style="color: #007700">()) {<br /> </span><span style="color: #FF8000">// Some specific IPC or so<br /> </span><span style="color: #0000BB">eio_poll</span><span style="color: #007700">();<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output
something similar to:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
string(1) "1"
int(0)
string(1) "3"
int(0)
string(1) "2"
int(0)
</pre></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-function.eio-poll-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member">eio_nreqs</li>
</ul>
</div>
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