1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>High-resolution timers</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="Basics.html" title="Chapter 1. Driver Basics"><link rel="prev" href="API-wake-up-atomic-t.html" title="wake_up_atomic_t"><link rel="next" href="API-ktime-set.html" title="ktime_set"></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">High-resolution timers</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-wake-up-atomic-t.html">Prev</a> </td><th width="60%" align="center">Chapter 1. Driver Basics</th><td width="20%" align="right"> <a accesskey="n" href="API-ktime-set.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id-1.3.6"></a>High-resolution timers</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="refentrytitle"><a href="API-ktime-set.html"><span class="phrase">ktime_set</span></a></span><span class="refpurpose"> — 2 Set a ktime_t variable from a seconds/nanoseconds value 3 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-equal.html"><span class="phrase">ktime_equal</span></a></span><span class="refpurpose"> — 4 Compares two ktime_t variables to see if they are equal 5 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-compare.html"><span class="phrase">ktime_compare</span></a></span><span class="refpurpose"> — 6 Compares two ktime_t variables for less, greater or equal 7 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-after.html"><span class="phrase">ktime_after</span></a></span><span class="refpurpose"> — 8 Compare if a ktime_t value is bigger than another one. 9 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-before.html"><span class="phrase">ktime_before</span></a></span><span class="refpurpose"> — 10 Compare if a ktime_t value is smaller than another one. 11 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-to-timespec-cond.html"><span class="phrase">ktime_to_timespec_cond</span></a></span><span class="refpurpose"> — 12 convert a ktime_t variable to timespec format only if the variable contains data 13 </span></dt><dt><span class="refentrytitle"><a href="API-ktime-to-timespec64-cond.html"><span class="phrase">ktime_to_timespec64_cond</span></a></span><span class="refpurpose"> — 14 convert a ktime_t variable to timespec64 format only if the variable contains data 15 </span></dt><dt><span class="refentrytitle"><a href="API-struct-hrtimer.html"><span class="phrase">struct hrtimer</span></a></span><span class="refpurpose"> — 16 the basic hrtimer structure 17 </span></dt><dt><span class="refentrytitle"><a href="API-struct-hrtimer-sleeper.html"><span class="phrase">struct hrtimer_sleeper</span></a></span><span class="refpurpose"> — 18 simple sleeper structure 19 </span></dt><dt><span class="refentrytitle"><a href="API-struct-hrtimer-clock-base.html"><span class="phrase">struct hrtimer_clock_base</span></a></span><span class="refpurpose"> — 20 the timer base for a specific clock 21 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-start.html"><span class="phrase">hrtimer_start</span></a></span><span class="refpurpose"> — 22 (re)start an hrtimer on the current CPU 23 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-forward-now.html"><span class="phrase">hrtimer_forward_now</span></a></span><span class="refpurpose"> — 24 forward the timer expiry so it expires after now 25 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-forward.html"><span class="phrase">hrtimer_forward</span></a></span><span class="refpurpose"> — 26 forward the timer expiry 27 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-start-range-ns.html"><span class="phrase">hrtimer_start_range_ns</span></a></span><span class="refpurpose"> — 28 (re)start an hrtimer on the current CPU 29 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-try-to-cancel.html"><span class="phrase">hrtimer_try_to_cancel</span></a></span><span class="refpurpose"> — 30 try to deactivate a timer 31 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-cancel.html"><span class="phrase">hrtimer_cancel</span></a></span><span class="refpurpose"> — 32 cancel a timer and wait for the handler to finish. 33 </span></dt><dt><span class="refentrytitle"><a href="API---hrtimer-get-remaining.html"><span class="phrase">__hrtimer_get_remaining</span></a></span><span class="refpurpose"> — 34 get remaining time for the timer 35 </span></dt><dt><span class="refentrytitle"><a href="API-hrtimer-init.html"><span class="phrase">hrtimer_init</span></a></span><span class="refpurpose"> — 36 initialize a timer to the given clock 37 </span></dt><dt><span class="refentrytitle"><a href="API-schedule-hrtimeout-range.html"><span class="phrase">schedule_hrtimeout_range</span></a></span><span class="refpurpose"> — 38 sleep until timeout 39 </span></dt><dt><span class="refentrytitle"><a href="API-schedule-hrtimeout.html"><span class="phrase">schedule_hrtimeout</span></a></span><span class="refpurpose"> — 40 sleep until timeout 41 </span></dt></dl></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-wake-up-atomic-t.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="Basics.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-ktime-set.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">wake_up_atomic_t</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">ktime_set</span></td></tr></table></div></body></html> 42