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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>Atomic and pointer manipulation</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch01.html" title="Chapter 1. Driver Basics" /><link rel="prev" href="re02.html" title="module_exit" /><link rel="next" href="re03.html" title="atomic_read" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Atomic and pointer manipulation</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re02.html">Prev</a> </td><th width="60%" align="center">Chapter 1. Driver Basics</th><td width="20%" align="right"> <a accesskey="n" href="re03.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Atomic and pointer manipulation"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id2546621"></a>Atomic and pointer manipulation</h2></div></div></div><div class="toc"><dl><dt><span class="refentrytitle"><a href="re03.html"><span>atomic_read</span></a></span><span class="refpurpose"> —
read atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re04.html"><span>atomic_set</span></a></span><span class="refpurpose"> —
set atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re05.html"><span>atomic_add</span></a></span><span class="refpurpose"> —
add integer to atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re06.html"><span>atomic_sub</span></a></span><span class="refpurpose"> —
subtract integer from atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re07.html"><span>atomic_sub_and_test</span></a></span><span class="refpurpose"> —
subtract value from variable and test result
</span></dt><dt><span class="refentrytitle"><a href="re08.html"><span>atomic_inc</span></a></span><span class="refpurpose"> —
increment atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re09.html"><span>atomic_dec</span></a></span><span class="refpurpose"> —
decrement atomic variable
</span></dt><dt><span class="refentrytitle"><a href="re10.html"><span>atomic_dec_and_test</span></a></span><span class="refpurpose"> —
decrement and test
</span></dt><dt><span class="refentrytitle"><a href="re11.html"><span>atomic_inc_and_test</span></a></span><span class="refpurpose"> —
increment and test
</span></dt><dt><span class="refentrytitle"><a href="re12.html"><span>atomic_add_negative</span></a></span><span class="refpurpose"> —
add and test if negative
</span></dt><dt><span class="refentrytitle"><a href="re13.html"><span>atomic_add_return</span></a></span><span class="refpurpose"> —
add integer and return
</span></dt><dt><span class="refentrytitle"><a href="re14.html"><span>atomic_sub_return</span></a></span><span class="refpurpose"> —
subtract integer and return
</span></dt><dt><span class="refentrytitle"><a href="re15.html"><span>atomic_add_unless</span></a></span><span class="refpurpose"> —
add unless the number is already a given value
</span></dt><dt><span class="refentrytitle"><a href="re16.html"><span>atomic64_xchg</span></a></span><span class="refpurpose"> —
xchg atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re17.html"><span>atomic64_set</span></a></span><span class="refpurpose"> —
set atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re18.html"><span>atomic64_read</span></a></span><span class="refpurpose"> —
read atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re19.html"><span>atomic64_add_return</span></a></span><span class="refpurpose"> —
add and return
</span></dt><dt><span class="refentrytitle"><a href="re20.html"><span>atomic64_add</span></a></span><span class="refpurpose"> —
add integer to atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re21.html"><span>atomic64_sub</span></a></span><span class="refpurpose"> —
subtract the atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re22.html"><span>atomic64_sub_and_test</span></a></span><span class="refpurpose"> —
subtract value from variable and test result
</span></dt><dt><span class="refentrytitle"><a href="re23.html"><span>atomic64_inc</span></a></span><span class="refpurpose"> —
increment atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re24.html"><span>atomic64_dec</span></a></span><span class="refpurpose"> —
decrement atomic64 variable
</span></dt><dt><span class="refentrytitle"><a href="re25.html"><span>atomic64_dec_and_test</span></a></span><span class="refpurpose"> —
decrement and test
</span></dt><dt><span class="refentrytitle"><a href="re26.html"><span>atomic64_inc_and_test</span></a></span><span class="refpurpose"> —
increment and test
</span></dt><dt><span class="refentrytitle"><a href="re27.html"><span>atomic64_add_negative</span></a></span><span class="refpurpose"> —
add and test if negative
</span></dt><dt><span class="refentrytitle"><a href="re28.html">
/builddir/build/BUILD/kernel-2.6.32-71.14.1.el6/linux-2.6.32-71.14.1.el6.noarch//arch/x86/include/asm/unaligned.h
</a></span><span class="refpurpose"> —
Document generation inconsistency
</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="re02.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch01.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>module_exit</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>atomic_read</span></td></tr></table></div></body></html>
