source: rtems/cpukit/rtems/src/clockset.c @ c0623a99

5
Last change on this file since c0623a99 was 1ef8e4a8, checked in by Sebastian Huber <sebastian.huber@…>, on 04/27/16 at 20:07:56

score: Avoid Giant lock for set time of day

Update #2555.
Update #2630.

  • Property mode set to 100644
File size: 1.1 KB
RevLine 
[205dbb9d]1/**
2 *  @file
[bd83f47]3 *
[205dbb9d]4 *  @brief Set the Current TOD
5 *  @ingroup ClassicClock
6 */
7
8/*
[08311cc3]9 *  COPYRIGHT (c) 1989-1999.
[bd83f47]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
[c499856]14 *  http://www.rtems.org/license/LICENSE.
[bd83f47]15 */
16
[1095ec1]17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
[bd83f47]21#include <rtems/rtems/clock.h>
[f031df0e]22#include <rtems/score/todimpl.h>
[0c3edbf]23#include <rtems/config.h>
[bd83f47]24
25rtems_status_code rtems_clock_set(
[8d7aea0d]26  const rtems_time_of_day *tod
[bd83f47]27)
28{
[8d7aea0d]29  if ( !tod )
[e980b219]30    return RTEMS_INVALID_ADDRESS;
31
[8d7aea0d]32  if ( _TOD_Validate( tod ) ) {
33    Timestamp_Control tod_as_timestamp;
[1ef8e4a8]34    uint32_t          seconds;
35    uint32_t          nanoseconds;
36    ISR_lock_Context  lock_context;
[8d7aea0d]37
[1ef8e4a8]38    seconds = _TOD_To_seconds( tod );
39    nanoseconds = tod->ticks
40      * rtems_configuration_get_nanoseconds_per_tick();
[8d7aea0d]41    _Timestamp_Set( &tod_as_timestamp, seconds, nanoseconds );
[812da54]42
[1ef8e4a8]43    _TOD_Lock();
44    _TOD_Acquire( &lock_context );
45    _TOD_Set( &tod_as_timestamp, &lock_context );
46    _TOD_Unlock();
[8d7aea0d]47
[bd83f47]48    return RTEMS_SUCCESSFUL;
49  }
[8d7aea0d]50
[bd83f47]51  return RTEMS_INVALID_CLOCK;
52}
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