<?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>snd_BUG_ON</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="snddev.html" title="Chapter 5. Sound Devices" /><link rel="prev" href="API-snd-BUG.html" title="snd_BUG" /><link rel="next" href="API-snd-printdd.html" title="snd_printdd" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>snd_BUG_ON</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-BUG.html">Prev</a> </td><th width="60%" align="center">Chapter 5. Sound Devices</th><td width="20%" align="right"> <a accesskey="n" href="API-snd-printdd.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="snd_BUG_ON"><a id="API-snd-BUG-ON"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_BUG_ON — debugging check macro </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"> <strong>fsfuncsnd_BUG_ON </strong>(</code></td><td> <var class="pdparam">cond</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3128603"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>cond</code></em></span></dt><dd><p> condition to evaluate </p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3128630"></a><h2>Description</h2><p> When CONFIG_SND_DEBUG is set, this macro evaluates the given condition, and call <code class="function">WARN</code> and returns the value if it's non-zero. </p><p> When CONFIG_SND_DEBUG is not set, this just returns zero, and the given condition is ignored. </p></div><div class="refsect1" title="NOTE"><a id="id3128652"></a><h2>NOTE</h2><p> the argument won't be evaluated at all when CONFIG_SND_DEBUG=n. Thus, don't put any statement that influences on the code behavior, such as pre/post increment, to the argument of this macro. If you want to evaluate and give a warning, use standard <code class="function">WARN_ON</code>. </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-snd-BUG.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="snddev.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-snd-printdd.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>snd_BUG</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>snd_printdd</span></td></tr></table></div></body></html>