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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>struct pipe_inode_info</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Filesystems API" /><link rel="up" href="ch07.html" title="Chapter 7. pipes API" /><link rel="prev" href="re223.html" title="struct pipe_buffer" /><link rel="next" href="re225.html" title="generic_pipe_buf_map" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>struct pipe_inode_info</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re223.html">Prev</a> </td><th width="60%" align="center">Chapter 7. pipes API</th><td width="20%" align="right"> <a accesskey="n" href="re225.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="struct pipe_inode_info"><a id="API-struct-pipe-inode-info"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct pipe_inode_info —
a linux kernel pipe
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
struct pipe_inode_info {
wait_queue_head_t wait;
unsigned int nrbufs;
unsigned int curbuf;
struct page * tmp_page;
unsigned int readers;
unsigned int writers;
unsigned int waiting_writers;
unsigned int r_counter;
unsigned int w_counter;
struct fasync_struct * fasync_readers;
struct fasync_struct * fasync_writers;
struct inode * inode;
struct pipe_buffer bufs[PIPE_BUFFERS];
}; </pre></div><div class="refsect1" title="Members"><a id="id3039194"></a><h2>Members</h2><div class="variablelist"><dl><dt><span class="term">wait</span></dt><dd><p>
reader/writer wait point in case of empty/full pipe
</p></dd><dt><span class="term">nrbufs</span></dt><dd><p>
the number of non-empty pipe buffers in this pipe
</p></dd><dt><span class="term">curbuf</span></dt><dd><p>
the current pipe buffer entry
</p></dd><dt><span class="term">tmp_page</span></dt><dd><p>
cached released page
</p></dd><dt><span class="term">readers</span></dt><dd><p>
number of current readers of this pipe
</p></dd><dt><span class="term">writers</span></dt><dd><p>
number of current writers of this pipe
</p></dd><dt><span class="term">waiting_writers</span></dt><dd><p>
number of writers blocked waiting for room
</p></dd><dt><span class="term">r_counter</span></dt><dd><p>
reader counter
</p></dd><dt><span class="term">w_counter</span></dt><dd><p>
writer counter
</p></dd><dt><span class="term">fasync_readers</span></dt><dd><p>
reader side fasync
</p></dd><dt><span class="term">fasync_writers</span></dt><dd><p>
writer side fasync
</p></dd><dt><span class="term">inode</span></dt><dd><p>
inode this pipe is attached to
</p></dd><dt><span class="term">bufs[PIPE_BUFFERS]</span></dt><dd><p>
the circular array of pipe buffers
</p></dd></dl></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re223.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch07.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re225.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>struct pipe_buffer</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>generic_pipe_buf_map</span></td></tr></table></div></body></html>
