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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_tick
*
* This directive notifies the executve that a tick has occurred.
* When the tick occurs the time manager updates and maintains
* the calendar time, timeslicing, and any timeout delays.
*
* Input parameters: NONE
*
* Output parameters:
* RTEMS_SUCCESSFUL - always succeeds
*
* NOTE: This routine only works for leap-years through 2099.
*/
rtems_status_code rtems_clock_tick( void )
{
_TOD_Tickle_ticks();
_Watchdog_Tickle_ticks();
_Thread_Tickle_timeslice();
if ( _Thread_Is_context_switch_necessary() &&
_Thread_Is_dispatching_enabled() )
_Thread_Dispatch();
return RTEMS_SUCCESSFUL;
}
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