source: rtems/cpukit/score/src/coretodget.c @ c499856

4.11
Last change on this file since c499856 was c499856, checked in by Chris Johns <chrisj@…>, on Mar 20, 2014 at 9:10:47 PM

Change all references of rtems.com to rtems.org.

  • Property mode set to 100644
File size: 1.0 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Returns a Current TOD with Nanosecond Granularity
5 *  @ingroup ScoreTODConstants
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2008.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18  #include "config.h"
19#endif
20
21#include <rtems/score/todimpl.h>
22#include <rtems/score/isrlevel.h>
23
24Timestamp_Control *_TOD_Get_with_nanoseconds(
25  Timestamp_Control *snapshot,
26  const Timestamp_Control *clock
27)
28{
29  TOD_Control      *tod = &_TOD;
30  ISR_lock_Context  lock_context;
31  Timestamp_Control offset;
32  Timestamp_Control now;
33  uint32_t          nanoseconds;
34
35  _TOD_Acquire( tod, &lock_context );
36    nanoseconds = ( *tod->nanoseconds_since_last_tick )();
37    now = *clock;
38  _TOD_Release( tod, &lock_context );
39
40  _Timestamp_Set( &offset, 0, nanoseconds );
41  _Timestamp_Add_to( &now, &offset );
42
43  *snapshot = now;
44
45  return snapshot;
46}
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