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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 hrtimer</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="ch01s04.html" title="High-resolution timers" /><link rel="prev" href="re79.html" title="ktime_equal" /><link rel="next" href="re81.html" title="struct hrtimer_sleeper" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>struct hrtimer</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re79.html">Prev</a> </td><th width="60%" align="center">High-resolution timers</th><td width="20%" align="right"> <a accesskey="n" href="re81.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="struct hrtimer"><a id="API-struct-hrtimer"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct hrtimer —
the basic hrtimer structure
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
struct hrtimer {
struct rb_node node;
ktime_t _expires;
ktime_t _softexpires;
enum hrtimer_restart (* function) (struct hrtimer *);
struct hrtimer_clock_base * base;
unsigned long state;
#ifdef CONFIG_TIMER_STATS
int start_pid;
void * start_site;
char start_comm[16];
#endif
}; </pre></div><div class="refsect1" title="Members"><a id="id3034927"></a><h2>Members</h2><div class="variablelist"><dl><dt><span class="term">node</span></dt><dd><p>
red black tree node for time ordered insertion
</p></dd><dt><span class="term">_expires</span></dt><dd><p>
the absolute expiry time in the hrtimers internal
representation. The time is related to the clock on
which the timer is based. Is setup by adding
slack to the _softexpires value. For non range timers
identical to _softexpires.
</p></dd><dt><span class="term">_softexpires</span></dt><dd><p>
the absolute earliest expiry time of the hrtimer.
The time which was given as expiry time when the timer
was armed.
</p></dd><dt><span class="term">function</span></dt><dd><p>
timer expiry callback function
</p></dd><dt><span class="term">base</span></dt><dd><p>
pointer to the timer base (per cpu and per clock)
</p></dd><dt><span class="term">state</span></dt><dd><p>
state information (See bit values above)
</p></dd><dt><span class="term">start_pid</span></dt><dd><p>
timer statistics field to store the pid of the task which
started the timer
</p></dd><dt><span class="term">start_site</span></dt><dd><p>
timer statistics field to store the site where the timer
was started
</p></dd><dt><span class="term">start_comm[16]</span></dt><dd><p>
timer statistics field to store the name of the process which
started the timer
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3035047"></a><h2>Description</h2><p>
The hrtimer structure must be initialized by <code class="function">hrtimer_init</code>
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re79.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch01s04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re81.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>ktime_equal</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>struct hrtimer_sleeper</span></td></tr></table></div></body></html>
