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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/*

 * Copyright (C) 2000 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

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * 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

 *

 *

 * CVS :        $Id: shutdown.c,v 1.2 2005-02-25 11:04:46 pj Exp $

  Shutdown demo, used to test system shutdown.

  - derived from demo aster4

  - the aper_asteroid task simulates some system tasks that have to

    finish prior system shutdown.

  - note that if you remove the nanosleep in aper_asteroid

    the system does not shut down correctly because the system

    tasks does not receive any CPU time!!!

*/

/*

 * Copyright (C) 2000 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

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * 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

 *

 */

#include "kernel/kern.h"

#include "edf/edf/edf.h"

#include "cbs/cbs/cbs.h"

#include <time.h>

#include <drivers/shark_linuxc26.h>

#include <drivers/shark_input26.h>

#include <drivers/shark_keyb26.h>

int num_aster = 0;

#define ASTER_LIM       60

#define DISPLAY_MAX     10

#define ASTER_MAX       70

#define STAT_Y          24

#define PER_MAX          5

#define APER_MAX         8

// These numbers works on a Pentium 133 */

#define PER_WCET     25000

#define APER_WCET    53000

#define CLOCK_WCET    1000

#define ASTER_WCET    1000

#define SOFT_MET      6300

#define APER_REP     22000

PID aper_table[APER_MAX];

int shutting_down = 0;

int nobandwidth;

TASK asteroide(void *arg)

{

  int i;

  for (;;) {

    i = 1;

    for (i=1; i < ASTER_LIM; i++) {

      puts_xy(i,20,WHITE,"*");

      task_endcycle();

      puts_xy(i,20,WHITE," ");

    }

  }

}

TASK system_asteroide(void *arg)

{

  int i;

  struct timespec t;

  t.tv_sec = 0;

  for (;;) {

    i = 1;

    for (i=1; i < ASTER_LIM; i++) {

      puts_xy(i,21,WHITE,"s");

      if (shutting_down) {

        cprintf("Ending System Task %d\n",(int)arg);

        return 0;

      }

      t.tv_nsec = 1000000*(100+rand()%200);

      nanosleep(&t,NULL);

      puts_xy(i,21,WHITE," ");

    }

  }

}

TASK aster()

{

  PID p;

  SOFT_TASK_MODEL m_soft;

  int r;

  int x; // adaptive bandwidth...

  soft_task_default_model(m_soft);

  soft_task_def_met(m_soft,SOFT_MET);

  soft_task_def_ctrl_jet(m_soft);

  x = 64;

  while (1) {

    if (num_aster < ASTER_MAX) {

      r = (rand() % 200);

      soft_task_def_period(m_soft, (x+r)*1000);

      p = task_create("aaa",asteroide,&m_soft,NULL);

      if (p == -1)

        {

          if (x < 500 && errno != ENO_AVAIL_TASK)  x += 1;

        }

      else {

        num_aster++;

        task_activate(p);

        x /= 2;

        if (x<50) x = 50;

      }

    }

    task_endcycle();

  }

}

/* we consider the first ASTER_MAX + 2 tasks from the PID 2

   and plot on the screen the elapsed times... */

TASK jetcontrol()

{

  int i;  /* a counter */

  TIME curr;

  PID p;

  struct timespec t;

  t.tv_sec=0;

  t.tv_nsec=100000;

  kern_cli();

  printf_xy(0,STAT_Y,WHITE,"PID ³ Curr.   ³ status ³ name");

  kern_sti();

  for (;;) {

    for (i=0,p=0; i<DISPLAY_MAX+5 && p<MAX_PROC; p++) {

      if (proc_table[p].status==FREE) continue;

      curr = 0;

      jet_getstat(p, NULL, NULL, NULL, &curr);

      kern_cli();

        printf_xy(0,STAT_Y+i+1,WHITE,"%-3d ³ %-7d ³ %-6d ³ %s                      ",

                  p, (int)curr, proc_table[p].status, proc_table[p].name);

      kern_sti();

      i++;

    }

    for (; i<DISPLAY_MAX+5;i++) {

      printf_xy(0,STAT_Y+i+1,WHITE,"    ³         ³        ³                     ");

    }

    if (!nobandwidth) nanosleep(&t, NULL);

  }

}

void endfun(KEY_EVT *k)

{

  exit(0);

}

void exiting(void *arg)

{

  cprintf("System shut down...\n");

  shutting_down = 1;

}

int main(int argc, char **argv)

{

  KEY_EVT k;

  PID p1,p3;

  HARD_TASK_MODEL m;

  SOFT_TASK_MODEL m_soft;

  NRT_TASK_MODEL  m_nrt;

  int i;

  srand(7);

  clear();

  cprintf("REMEMBER: RUN THIS DEMO IN 80x50 TEXT MODE!!!\n");

  cprintf("use \"mode con lines=50\" to put the screen in 80x50.\n\n");

  cprintf("Press SPACE for a typical WRONG shutdown sequence\n");

  cprintf("   where the shutdown task does not receive bandwidth\n\n");

  cprintf("Press another key for a clear shutdown\n");

  nobandwidth = !(keyb_getch(BLOCK) - ' ');

  k.flag = 0;

  k.scan = KEY_ENT;

  k.ascii = 13;

  k.status = KEY_PRESSED;

  keyb_hook(k, endfun, FALSE);

  clear();

  if (nobandwidth)

    cprintf("ENTER to end the demo WITH A TIMEOUT...\n");

  else

    cprintf("ENTER to end the demo SHUTTING DOWN THE SYSTEM TASKS...\n");

  sys_atrunlevel(exiting, NULL, RUNLEVEL_SHUTDOWN);

  hard_task_default_model(m);

  hard_task_def_wcet(m,ASTER_WCET);

  hard_task_def_mit(m,10000);

  hard_task_def_group(m,1);

  hard_task_def_ctrl_jet(m);

  p1 = task_create("Aster",aster,&m,NULL);

  if (p1 == -1) {

    sys_shutdown_message("(main): Could not create task <aster> ...");

    exit(0);

  }

  soft_task_default_model(m_soft);

  soft_task_def_met(m_soft,1000);

  soft_task_def_period(m_soft,100000);

  soft_task_def_group(m_soft,1);

  soft_task_def_aperiodic(m_soft);

  soft_task_def_system(m_soft);

  soft_task_def_ctrl_jet(m_soft);

  soft_task_def_nokill(m_soft);

  p3 = task_create("JetControl",jetcontrol,&m_soft,NULL);

  if (p3 == -1) {

    sys_shutdown_message("(main): Could not create task <JetControl> ...");

    exit(0);

  }

  /* These are the tasks that simulate the system tasks */

  nrt_task_default_model(m_nrt);

  nrt_task_def_ctrl_jet(m_nrt);

  nrt_task_def_system(m_nrt);

  nrt_task_def_group(m_nrt,1);

  cprintf("creating system tasks: ");

  for (i=0; i<APER_MAX; i++) {

    char systemtaskname[]="mysystemtask0";

    nrt_task_def_arg(m_nrt,(void *)i);

    systemtaskname[12]='0'+i;

    aper_table[i] = task_create(systemtaskname,system_asteroide,&m_nrt,NULL);

    if (aper_table[i] == -1) {

      sys_shutdown_message("(main): Could not create task <mysystemtask> ...");      exit(0);

    }

    else

      cprintf(" %d",i);

  }

  cprintf("\n");

  group_activate(1);

  return 0;

}