1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>abort_exclusive_wait</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="ch01s04.html" title="Wait queues and Wake events"><link rel="prev" href="API-finish-wait.html" title="finish_wait"><link rel="next" href="API-wake-up-bit.html" title="wake_up_bit"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">abort_exclusive_wait</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-finish-wait.html">Prev</a>&#160;</td><th width="60%" align="center">Wait queues and Wake events</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-wake-up-bit.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-abort-exclusive-wait"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>abort_exclusive_wait &#8212; 
2     abort exclusive waiting in a queue
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">abort_exclusive_wait </b>(</code></td><td>wait_queue_head_t * <var class="pdparam">q</var>, </td></tr><tr><td>&#160;</td><td>wait_queue_t * <var class="pdparam">wait</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">mode</var>, </td></tr><tr><td>&#160;</td><td>void * <var class="pdparam">key</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107456532"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>q</code></em></span></dt><dd><p>
4     waitqueue waited on
5    </p></dd><dt><span class="term"><em class="parameter"><code>wait</code></em></span></dt><dd><p>
6     wait descriptor
7    </p></dd><dt><span class="term"><em class="parameter"><code>mode</code></em></span></dt><dd><p>
8     runstate of the waiter to be woken
9    </p></dd><dt><span class="term"><em class="parameter"><code>key</code></em></span></dt><dd><p>
10     key to identify a wait bit queue or <code class="constant">NULL</code>
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107461252"></a><h2>Description</h2><p>
12   Sets current thread back to running state and removes
13   the wait descriptor from the given waitqueue if still
14   queued.
15   </p><p>
16
17   Wakes up the next waiter if the caller is concurrently
18   woken up through the queue.
19   </p><p>
20
21   This prevents waiter starvation where an exclusive waiter
22   aborts and is woken up concurrently and no one wakes up
23   the next waiter.
24</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-finish-wait.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s04.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-wake-up-bit.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">finish_wait</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">wake_up_bit</span></td></tr></table></div></body></html>
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