clockset.c

来自「RTEMS (Real-Time Executive for Multiproc」· C语言 代码 · 共 54 行

/*
 *  Clock Manager
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: clockset.c,v 1.2.6.2 2004/05/06 19:20:03 joel Exp $
 */

#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/clock.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/tod.h>
#include <rtems/score/watchdog.h>

/*PAGE
 *
 *  rtems_clock_set
 *
 *  This directive sets the date and time for this node.
 *
 *  Input parameters:
 *    time_buffer - pointer to the time and date structure
 *
 *  Output parameters:
 *    RTEMS_SUCCESSFUL - if successful
 *    error code        - if unsuccessful
 */

rtems_status_code rtems_clock_set(
  rtems_time_of_day *time_buffer
)
{
  rtems_interval     seconds;

  if ( !time_buffer )
    return RTEMS_INVALID_ADDRESS;

  if ( _TOD_Validate( time_buffer ) ) {
    seconds = _TOD_To_seconds( time_buffer );
    _Thread_Disable_dispatch();
      _TOD_Set( time_buffer, seconds );
    _Thread_Enable_dispatch();
    return RTEMS_SUCCESSFUL;
  }
  return RTEMS_INVALID_CLOCK;
}