Subversion Repositories shark


Blame | Last modification | View Log | RSS feed

 * Project: S.Ha.R.K.
 * Coordinators:
 *   Giorgio Buttazzo    <>
 *   Paolo Gai           <>
 * Authors     :
 *   Paolo Gai           <>
 *   Massimiliano Giorgi <>
 *   Luca Abeni          <>
 *   (see the web pages for full authors list)
 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 CVS :        $Id: edfstar.h,v 1.1 2004-06-01 11:42:43 giacomo Exp $

 File:        $File$
 Revision:    $Revision: 1.1 $
 Last update: $Date: 2004-06-01 11:42:43 $


 Task Models Accepted:
   HARD_TASK_MODEL - Hard Tasks (only Periodic)
     wcet field and mit field must be != 0. They are used to set the wcet
       and period of the tasks.
     periodicity field can be only PERIODIC
     drel field is ignored
 Guest Models Accepted:
   JOB_TASK_MODEL - a single guest task activation
     Identified by an absolute deadline and a period.
     period field is ignored


   This module schedule his tasks following the classic EDF
   scheme. This module is derived from the EDFACT Scheduling Module.

   This module can not stay alone: when it have to schedule a task, it
   simply inserts it into another master module using a

   No Task guarantee is performed at all.
   The tasks scheduled are only periodic.
   All the task are put in a queue and the scheduling is based on the
   deadline value.
   If a task miss a deadline a counter is incremented.
   If a task exausts the wcet a counter is incremented
   No ZOMBIE support!!!!!!

 Exceptions raised:
     some primitives are not implemented:
     task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay

     If a task is actiated through task_activate or guest_activate more than
     one time
 Restrictions & special features:
   - This level doesn't manage the main task.
   - Functions to return and reset the nact, wcet and dline miss
     counters are provided


 * Copyright (C) 2001 Paolo Gai
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef __EDFSTAR_H__
#define __EDFSTAR_H__

#include <ll/ll.h>
#include <kernel/config.h>
#include <sys/types.h>
#include <kernel/types.h>

/* flags... */
#define EDFSTAR_ENABLE_GUARANTEE      1  /* Task Guarantee enabled */
#define EDFSTAR_ENABLE_ALL            1

#define EDFSTAR_FAILED_GUARANTEE      8  /* used in the module, unsettabl
                                         in EDF_register_level... */

#define EDFSTAR_LEVELNAME        "EDFSTAR base"
#define EDFSTAR_LEVEL_CODE       166

/* Registration function:
   int budget      The budget used by this module (see CBSSTAR.h)
   int master      The master module used by EDFSTAR

LEVEL EDFSTAR_register_level(int budget, int master);

/* returns respectively the number of dline, wcet or nact; -1 if error */
int EDFSTAR_get_dline_miss(PID p);
int EDFSTAR_get_wcet_miss(PID p);
int EDFSTAR_get_nact(PID p);

/* resets respectively the number of dline, wcet miss; -1 if error */
int EDFSTAR_reset_dline_miss(PID p);
int EDFSTAR_reset_wcet_miss(PID p);