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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [tasksetnote.c] - Blame information for rev 30

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/*
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 *  RTEMS Task Manager
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 *
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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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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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: tasksetnote.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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 */
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/support.h>
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#include <rtems/rtems/modes.h>
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#include <rtems/score/object.h>
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#include <rtems/score/stack.h>
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#include <rtems/score/states.h>
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#include <rtems/rtems/tasks.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/threadq.h>
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#include <rtems/score/tod.h>
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#include <rtems/score/userext.h>
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#include <rtems/score/wkspace.h>
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#include <rtems/score/apiext.h>
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#include <rtems/score/sysstate.h>
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/*PAGE
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 *
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 * rtems_task_set_note
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 *
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 *  This directive sets the specified notepad contents to the given
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 *  note.
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 *
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 *  Input parameters:
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 *    id      - thread id
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 *    notepad - notepad number
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 *    note    - note value
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 *
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 *  Output parameters:
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 *    RTEMS_SUCCESSFUL - if successful
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 *    error code        - if unsuccessful
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 */
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rtems_status_code rtems_task_set_note(
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  Objects_Id id,
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  unsigned32 notepad,
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  unsigned32 note
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)
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{
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  register Thread_Control *the_thread;
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  Objects_Locations        location;
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  RTEMS_API_Control       *api;
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  /*
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   *  NOTE:  There is no check for < RTEMS_NOTEPAD_FIRST because that would
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   *         be checking an unsigned number for being negative.
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   */
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  if ( notepad > RTEMS_NOTEPAD_LAST )
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    return RTEMS_INVALID_NUMBER;
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  /*
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   *  Optimize the most likely case to avoid the Thread_Dispatch.
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   */
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  if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
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       _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) {
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      api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
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      api->Notepads[ notepad ] = note;
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      return RTEMS_SUCCESSFUL;
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  }
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  the_thread = _Thread_Get( id, &location );
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  switch ( location ) {
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    case OBJECTS_REMOTE:
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#if defined(RTEMS_MULTIPROCESSING)
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      return _RTEMS_tasks_MP_Send_request_packet(
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        RTEMS_TASKS_MP_SET_NOTE_REQUEST,
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        id,
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        0,          /* Not used */
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        notepad,
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        note
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      );
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#endif
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    case OBJECTS_ERROR:
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      return RTEMS_INVALID_ID;
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    case OBJECTS_LOCAL:
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      api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
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      api->Notepads[ notepad ] = note;
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      _Thread_Enable_dispatch();
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      return RTEMS_SUCCESSFUL;
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  }
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  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
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}

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