src/libs/compat/freebsd_network/clock.c

   1 /*
   2  * Copyright 2009, Colin Günther, coling@gmx.de
   3  * All rights reserved. Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include "device.h"
   8
   9 #include <compat/sys/kernel.h>
  10
  11
  12 int ticks;
  13 static timer sHardClockTimer;
  14
  15
  16 /*!
  17  * Implementation of FreeBSD's hardclock timer.
  18  */
  19 static status_t
  20 hardClock(timer* hardClockTimer)
  21 {
  22         atomic_add((vint32*)&ticks, 1);
  23         return B_OK;
  24 }
  25
  26
  27 /*!
  28  * Initialization of the hardclock timer which ticks according to hz defined in
  29  * compat/sys/kernel.h.
  30  */
  31 status_t
  32 init_hard_clock()
  33 {
  34         ticks = 0;
  35         return add_timer(&sHardClockTimer, hardClock, ticks_to_usecs(1),
  36                 B_PERIODIC_TIMER);
  37 }
  38
  39
  40 void
  41 uninit_hard_clock()
  42 {
  43         cancel_timer(&sHardClockTimer);
  44 }