source: rtems/cpukit/rtems/src/clocktick.c @ bd83f47

4.104.114.84.95
Last change on this file since bd83f47 was bd83f47, checked in by Joel Sherrill <joel.sherrill@…>, on May 17, 1999 at 10:42:47 PM

Split Clock Manager into one routine per file.

  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*
2 *  Clock Manager
3 *
4 *  COPYRIGHT (c) 1989-1998.
5 *  On-Line Applications Research Corporation (OAR).
6 *  Copyright assigned to U.S. Government, 1994.
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.OARcorp.com/rtems/license.html.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/rtems/status.h>
17#include <rtems/rtems/clock.h>
18#include <rtems/score/isr.h>
19#include <rtems/score/thread.h>
20#include <rtems/score/tod.h>
21#include <rtems/score/watchdog.h>
22
23/*PAGE
24 *
25 *  rtems_clock_tick
26 *
27 *  This directive notifies the executve that a tick has occurred.
28 *  When the tick occurs the time manager updates and maintains
29 *  the calendar time, timeslicing, and any timeout delays.
30 *
31 *  Input parameters:  NONE
32 *
33 *  Output parameters:
34 *    RTEMS_SUCCESSFUL - always succeeds
35 *
36 *  NOTE: This routine only works for leap-years through 2099.
37 */
38
39rtems_status_code rtems_clock_tick( void )
40{
41  _TOD_Tickle_ticks();
42
43  _Watchdog_Tickle_ticks();
44
45  _Thread_Tickle_timeslice();
46
47  if ( _Thread_Is_context_switch_necessary() &&
48       _Thread_Is_dispatching_enabled() )
49    _Thread_Dispatch();
50
51  return RTEMS_SUCCESSFUL;
52}
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