<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Bit Operations</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux Kernel API" /><link rel="up" href="ch02.html" title="Chapter 2. Basic C Library Functions" /><link rel="prev" href="re86.html" title="memchr" /><link rel="next" href="re87.html" title="set_bit" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Bit Operations</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re86.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Basic C Library Functions</th><td width="20%" align="right"> <a accesskey="n" href="re87.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Bit Operations"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id2628639"></a>Bit Operations</h2></div></div></div><div class="toc"><dl><dt><span class="refentrytitle"><a href="re87.html"><span>set_bit</span></a></span><span class="refpurpose"> —
Atomically set a bit in memory
</span></dt><dt><span class="refentrytitle"><a href="re88.html"><span>__set_bit</span></a></span><span class="refpurpose"> —
Set a bit in memory
</span></dt><dt><span class="refentrytitle"><a href="re89.html"><span>clear_bit</span></a></span><span class="refpurpose"> —
Clears a bit in memory
</span></dt><dt><span class="refentrytitle"><a href="re90.html"><span>__change_bit</span></a></span><span class="refpurpose"> —
Toggle a bit in memory
</span></dt><dt><span class="refentrytitle"><a href="re91.html"><span>change_bit</span></a></span><span class="refpurpose"> —
Toggle a bit in memory
</span></dt><dt><span class="refentrytitle"><a href="re92.html"><span>test_and_set_bit</span></a></span><span class="refpurpose"> —
Set a bit and return its old value
</span></dt><dt><span class="refentrytitle"><a href="re93.html"><span>test_and_set_bit_lock</span></a></span><span class="refpurpose"> —
Set a bit and return its old value for lock
</span></dt><dt><span class="refentrytitle"><a href="re94.html"><span>__test_and_set_bit</span></a></span><span class="refpurpose"> —
Set a bit and return its old value
</span></dt><dt><span class="refentrytitle"><a href="re95.html"><span>test_and_clear_bit</span></a></span><span class="refpurpose"> —
Clear a bit and return its old value
</span></dt><dt><span class="refentrytitle"><a href="re96.html"><span>__test_and_clear_bit</span></a></span><span class="refpurpose"> —
Clear a bit and return its old value
</span></dt><dt><span class="refentrytitle"><a href="re97.html"><span>test_and_change_bit</span></a></span><span class="refpurpose"> —
Change a bit and return its old value
</span></dt><dt><span class="refentrytitle"><a href="re98.html"><span>test_bit</span></a></span><span class="refpurpose"> —
Determine whether a bit is set
</span></dt><dt><span class="refentrytitle"><a href="re99.html"><span>__ffs</span></a></span><span class="refpurpose"> —
find first set bit in word
</span></dt><dt><span class="refentrytitle"><a href="re100.html"><span>ffz</span></a></span><span class="refpurpose"> —
find first zero bit in word
</span></dt><dt><span class="refentrytitle"><a href="re101.html"><span>ffs</span></a></span><span class="refpurpose"> —
find first set bit in word
</span></dt><dt><span class="refentrytitle"><a href="re102.html"><span>fls</span></a></span><span class="refpurpose"> —
find last set bit in word
</span></dt></dl></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re86.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re87.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>memchr</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>set_bit</span></td></tr></table></div></body></html>
