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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>input_handler_for_each_handle</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="input_subsystem.html#id3151281" title="Input core" /><link rel="prev" href="API-input-unregister-handler.html" title="input_unregister_handler" /><link rel="next" href="API-input-register-handle.html" title="input_register_handle" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>input_handler_for_each_handle</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-input-unregister-handler.html">Prev</a> </td><th width="60%" align="center">Input core</th><td width="20%" align="right"> <a accesskey="n" href="API-input-register-handle.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="input_handler_for_each_handle"><a id="API-input-handler-for-each-handle"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>input_handler_for_each_handle —
handle iterator
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">int <strong>fsfuncinput_handler_for_each_handle </strong>(</code></td><td>struct input_handler * <var class="pdparam">handler</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">data</var>, </td></tr><tr><td> </td><td>int (*<var class="pdparam">fn</var>)
<code>(</code>struct input_handle *, void *<code>)</code><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3157935"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>handler</code></em></span></dt><dd><p>
input handler to iterate
</p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
data for the callback
</p></dd><dt><span class="term"><em class="parameter"><code>fn</code></em></span></dt><dd><p>
function to be called for each handle
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3157996"></a><h2>Description</h2><p>
Iterate over <em class="parameter"><code>bus</code></em>'s list of devices, and call <em class="parameter"><code>fn</code></em> for each, passing
it <em class="parameter"><code>data</code></em> and stop when <em class="parameter"><code>fn</code></em> returns a non-zero value. The function is
using RCU to traverse the list and therefore may be usind in atonic
contexts. The <em class="parameter"><code>fn</code></em> callback is invoked from RCU critical section and
thus must not sleep.
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