source: rtems/cpukit/rtems/src/clockget.c @ e980b219

4.104.114.84.95
Last change on this file since e980b219 was e980b219, checked in by Joel Sherrill <joel.sherrill@…>, on 05/06/04 at 19:21:40

2004-05-06 Joel Sherrill <joel@…>

PR 618/rtems

  • rtems/include/rtems/rtems/status.h, rtems/src/clockget.c, rtems/src/clockset.c, rtems/src/dpmemcreate.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventmp.c, rtems/src/eventreceive.c, rtems/src/eventsend.c, rtems/src/msgqbroadcast.c, rtems/src/msgqcreate.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsubmit.c, rtems/src/partcreate.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemoncreate.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonident.c, rtems/src/ratemonperiod.c, rtems/src/regioncreate.c, rtems/src/regiondelete.c, rtems/src/regionextend.c, rtems/src/regiongetsegment.c, rtems/src/regiongetsegmentsize.c, rtems/src/regionreturnsegment.c, rtems/src/semcreate.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semident.c, rtems/src/taskcreate.c, rtems/src/taskgetnote.c, rtems/src/taskmode.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/taskwakewhen.c, rtems/src/timercreate.c, rtems/src/timerdelete.c, rtems/src/timerfireafter.c, rtems/src/timerfirewhen.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c, score/include/rtems/score/object.h, score/src/coretodvalidate.c, score/src/objectnametoid.c: Add NULL checks.
  • Property mode set to 100644
File size: 2.3 KB
Line 
1/*
2 *  Clock Manager
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#include <rtems/system.h>
15#include <rtems/rtems/status.h>
16#include <rtems/rtems/clock.h>
17#include <rtems/score/isr.h>
18#include <rtems/score/thread.h>
19#include <rtems/score/tod.h>
20#include <rtems/score/watchdog.h>
21
22/*PAGE
23 *
24 *  rtems_clock_get
25 *
26 *  This directive returns the current date and time.  If the time has
27 *  not been set by a tm_set then an error is returned.
28 *
29 *  Input parameters:
30 *    option      - which value to return
31 *    time_buffer - pointer to output buffer (a time and date structure
32 *                  or an interval)
33 *
34 *  Output parameters:
35 *    time_buffer      - output filled in
36 *    RTEMS_SUCCESSFUL - if successful
37 *    error code       - if unsuccessful
38 */
39
40rtems_status_code rtems_clock_get(
41  rtems_clock_get_options  option,
42  void                    *time_buffer
43)
44{
45  ISR_Level      level;
46  rtems_interval tmp;
47
48   if ( !time_buffer )
49     return RTEMS_INVALID_ADDRESS;
50
51  switch ( option ) {
52    case RTEMS_CLOCK_GET_TOD:
53      if ( !_TOD_Is_set )
54        return RTEMS_NOT_DEFINED;
55
56      *(rtems_time_of_day *)time_buffer = _TOD_Current;
57      return RTEMS_SUCCESSFUL;
58
59    case RTEMS_CLOCK_GET_SECONDS_SINCE_EPOCH:
60      if ( !_TOD_Is_set )
61        return RTEMS_NOT_DEFINED;
62
63      *(rtems_interval *)time_buffer = _TOD_Seconds_since_epoch;
64      return RTEMS_SUCCESSFUL;
65
66    case RTEMS_CLOCK_GET_TICKS_SINCE_BOOT:
67      *(rtems_interval *)time_buffer = _Watchdog_Ticks_since_boot;
68      return RTEMS_SUCCESSFUL;
69
70    case RTEMS_CLOCK_GET_TICKS_PER_SECOND:
71      *(rtems_interval *)time_buffer = _TOD_Ticks_per_second;
72      return RTEMS_SUCCESSFUL;
73
74    case RTEMS_CLOCK_GET_TIME_VALUE:
75      if ( !_TOD_Is_set )
76        return RTEMS_NOT_DEFINED;
77
78      _ISR_Disable( level );
79        ((rtems_clock_time_value *)time_buffer)->seconds =
80          _TOD_Seconds_since_epoch;
81        tmp = _TOD_Current.ticks;
82      _ISR_Enable( level );
83
84      tmp *= _TOD_Microseconds_per_tick;
85      ((rtems_clock_time_value *)time_buffer)->microseconds = tmp;
86
87      return RTEMS_SUCCESSFUL;
88  }
89
90  return RTEMS_INTERNAL_ERROR;   /* should never get here */
91
92}
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