/*
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/*
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* Clock Manager
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* Clock Manager
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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* On-Line Applications Research Corporation (OAR).
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*
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*
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* The license and distribution terms for this file may be
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* clocktick.c,v 1.2 1999/11/17 17:50:27 joel Exp
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* clocktick.c,v 1.2 1999/11/17 17:50:27 joel Exp
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*/
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*/
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#include <rtems/system.h>
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/clock.h>
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#include <rtems/rtems/clock.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/tod.h>
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#include <rtems/score/tod.h>
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#include <rtems/score/watchdog.h>
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#include <rtems/score/watchdog.h>
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/*PAGE
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/*PAGE
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*
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*
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* rtems_clock_tick
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* rtems_clock_tick
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*
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*
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* This directive notifies the executve that a tick has occurred.
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* This directive notifies the executve that a tick has occurred.
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* When the tick occurs the time manager updates and maintains
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* When the tick occurs the time manager updates and maintains
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* the calendar time, timeslicing, and any timeout delays.
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* the calendar time, timeslicing, and any timeout delays.
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*
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*
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* Input parameters: NONE
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* Input parameters: NONE
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*
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*
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* Output parameters:
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* Output parameters:
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* RTEMS_SUCCESSFUL - always succeeds
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* RTEMS_SUCCESSFUL - always succeeds
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*
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*
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* NOTE: This routine only works for leap-years through 2099.
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* NOTE: This routine only works for leap-years through 2099.
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*/
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*/
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rtems_status_code rtems_clock_tick( void )
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rtems_status_code rtems_clock_tick( void )
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{
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{
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_TOD_Tickle_ticks();
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_TOD_Tickle_ticks();
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_Watchdog_Tickle_ticks();
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_Watchdog_Tickle_ticks();
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_Thread_Tickle_timeslice();
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_Thread_Tickle_timeslice();
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if ( _Thread_Is_context_switch_necessary() &&
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if ( _Thread_Is_context_switch_necessary() &&
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_Thread_Is_dispatching_enabled() )
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_Thread_Is_dispatching_enabled() )
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_Thread_Dispatch();
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_Thread_Dispatch();
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return RTEMS_SUCCESSFUL;
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return RTEMS_SUCCESSFUL;
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}
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}
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