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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>__kfifo_put</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="ch06.html#id2990386" title="kfifo interface" /><link rel="prev" href="re267.html" title="kfifo_free" /><link rel="next" href="re269.html" title="__kfifo_get" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>__kfifo_put</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re267.html">Prev</a> </td><th width="60%" align="center">kfifo interface</th><td width="20%" align="right"> <a accesskey="n" href="re269.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="__kfifo_put"><a id="API---kfifo-put"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__kfifo_put —
puts some data into the FIFO, no locking version
</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">unsigned int <b class="fsfunc">__kfifo_put </b>(</code></td><td>struct kfifo * <var class="pdparam">fifo</var>, </td></tr><tr><td> </td><td>const unsigned char * <var class="pdparam">buffer</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">len</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2991762"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>fifo</code></em></span></dt><dd><p>
the fifo to be used.
</p></dd><dt><span class="term"><em class="parameter"><code>buffer</code></em></span></dt><dd><p>
the data to be added.
</p></dd><dt><span class="term"><em class="parameter"><code>len</code></em></span></dt><dd><p>
the length of the data to be added.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2991824"></a><h2>Description</h2><p>
This function copies at most <em class="parameter"><code>len</code></em> bytes from the <em class="parameter"><code>buffer</code></em> into
the FIFO depending on the free space, and returns the number of
bytes copied.
</p><p>
Note that with only one concurrent reader and one concurrent
writer, you don't need extra locking to use these functions.
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