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/*
* Clock Manager
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#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_get
*
* This directive returns the current date and time. If the time has
* not been set by a tm_set then an error is returned.
*
* Input parameters:
* option - which value to return
* time_buffer - pointer to output buffer (a time and date structure
* or an interval)
*
* Output parameters:
* time_buffer - output filled in
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_clock_get(
rtems_clock_get_options option,
void *time_buffer
)
{
ISR_Level level;
rtems_interval tmp;
switch ( option ) {
case RTEMS_CLOCK_GET_TOD:
if ( !_TOD_Is_set )
return RTEMS_NOT_DEFINED;
*(rtems_time_of_day *)time_buffer = _TOD_Current;
return RTEMS_SUCCESSFUL;
case RTEMS_CLOCK_GET_SECONDS_SINCE_EPOCH:
if ( !_TOD_Is_set )
return RTEMS_NOT_DEFINED;
*(rtems_interval *)time_buffer = _TOD_Seconds_since_epoch;
return RTEMS_SUCCESSFUL;
case RTEMS_CLOCK_GET_TICKS_SINCE_BOOT:
*(rtems_interval *)time_buffer = _Watchdog_Ticks_since_boot;
return RTEMS_SUCCESSFUL;
case RTEMS_CLOCK_GET_TICKS_PER_SECOND:
*(rtems_interval *)time_buffer = _TOD_Ticks_per_second;
return RTEMS_SUCCESSFUL;
case RTEMS_CLOCK_GET_TIME_VALUE:
if ( !_TOD_Is_set )
return RTEMS_NOT_DEFINED;
_ISR_Disable( level );
((rtems_clock_time_value *)time_buffer)->seconds =
_TOD_Seconds_since_epoch;
tmp = _TOD_Current.ticks;
_ISR_Enable( level );
tmp *= _TOD_Microseconds_per_tick;
((rtems_clock_time_value *)time_buffer)->microseconds = tmp;
return RTEMS_SUCCESSFUL;
}
return RTEMS_INTERNAL_ERROR; /* should never get here */
}
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