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1090 pj 1
/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
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 *   Luca Abeni          <luca@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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1448 giacomo 21
/* CVS :        $Id: cannone.c,v 1.2 2004-05-23 08:59:27 giacomo Exp $ */
1090 pj 22
 
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/*
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 * Copyright (C) 2000 Fabio Calabrese <fabiocalabrese77@yahoo.it>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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//**************************
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//* file:        cannone.c *
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//* included by: bca.c     *
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//**************************
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TASK cannone_creator(void * arg)
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{ int             i, index, last;
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  WORD            count;
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  PID             pid=-1;
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  while(1){
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    count=0;
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    index=-1;
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    last=-1;
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    for (i=0; i<CANNONE_N_MAX; i++)  // Conteggio aerei attivi
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      if (cannone_table[i].status) {
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         count++;
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         last=i;          //...ultima posizione occupata in tabella...
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         }
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      else {
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         if (index==-1) index=i;   //...prima posizione libera in tabella...
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         }
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    if (count<cannone_count && index!=-1) { // Richiesta nuovo cannone
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      cannone_table[index].status =  1;     //...occupa posizione...
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      cannone_table[index].killing = 0;     //...disattiva richiesta di kill...
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      if (index==0) pid = crea_hard_cannone(index); // sempre il 1ø hard
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      else          pid = crea_soft_cannone(index); // tutti gli altri soft
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      cannone_table[index].pid = pid;
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      if (pid!=NIL) task_activate(pid);
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      else {           //ripristino il posto libero in tabella;
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        cannone_table[index].status =  -2;
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        cannone_table[index].killing = -2;
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        }
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      }
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    else if (count>cannone_count) {       // Richiesta cancellazione cannone
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      cannone_table[last].killing = 1;
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      }
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     task_endcycle();
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    }
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  return NULL;
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}
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1448 giacomo 89
PID crea_soft_cannone_creator();
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PID crea_hard_cannone(int index);
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PID crea_hard_cannone(int index);
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PID crea_hard_missile(int index);
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PID crea_soft_missile(int index);
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1090 pj 96
TASK cannone(void *arg)
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{
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  PID        missile_pid=-2;
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  int        i, index;    // indice nella aereo_table e cannone_table
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  int        d, dir;
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  int        xx0,yy0,xx1,yy1;
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  int        first_time;
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  index = (int)arg;
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  first_time = 1;
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  if (index%2) {
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     //indice dispari
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     xx0 = X0 + 500/2 - CANNONE_LX/2 + 500/(CANNONE_N_MAX+1)*(index+1)/2;
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     }
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  else {
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     //indice pari
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     xx0 = X0 + 500/2 - CANNONE_LX/2 - 500/(CANNONE_N_MAX+1)*(index/2);
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     }
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  xx1 = xx0 + CANNONE_LX;
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  yy0= Y1 - CANNONE_LY;
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  yy1= Y1;
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118
  cannone_table[index].x = xx0 + CANNONE_LX/2;
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  while(1){
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   if (cannone_table[index].killing) {
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      if (!first_time) {
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          mutex_lock(&grx_mutex);
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          FAB_image_put_within(image_bca,X0,Y0,xx0,yy0,xx1,yy1);
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          mutex_unlock(&grx_mutex);
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          }
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      cannone_table[index].status=0;
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      cannone_table[index].pid=-2;
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      cannone_table[index].killing=0;
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      //il task aereo_creator si accorge che c'Š un aereo in meno
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      // quindi ne ricreer… uno nuovo!!!
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      return NULL;
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      }
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   if (first_time) {
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      mutex_lock(&grx_mutex);   //...aggiorna disegno...
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      if (index==0) FAB_image_put(image_cannone[1], xx0, yy0);
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      else          FAB_image_put(image_cannone[0], xx0, yy0);
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      mutex_unlock(&grx_mutex);
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      first_time=0;
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      }
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    if (!cannone_table[index].fire) {
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      for (i=0; i<AEREO_N_MAX; i++) {
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         if (aereo_table[i].status) {
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             d = aereo_table[i].x - (xx0+CANNONE_LX/2);
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             dir = aereo_table[i].dir;
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             if (d*dir<0 && FAB_ABS(d)<=CANNONE_SENSIBILITA/1000.0*500/BASE_L) {
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                  // FA   F U O C O
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                  if (index==0) missile_pid=crea_hard_missile(index);
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                  else          missile_pid=crea_soft_missile(index);
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                  if (missile_pid!=NIL) {
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                     cannone_table[index].fire = 1;
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                     task_activate(missile_pid);
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                     break;
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                     }
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                  }
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             }
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         }
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      }
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163
   task_endcycle();
164
 }
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return NULL;
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}
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PID crea_soft_cannone_creator()
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{
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  SOFT_TASK_MODEL m;
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  PID pid;
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  soft_task_default_model(m);
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  soft_task_def_periodic(m);
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  soft_task_def_period(m,CANNONE_CREATOR_PERIOD);
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  soft_task_def_wcet(m,CANNONE_CREATOR_WCET);
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  soft_task_def_met(m,CANNONE_CREATOR_MET);
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  pid = task_create("cannone_creator", cannone_creator, &m, NULL);
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  return pid;
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}
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PID crea_hard_cannone(int index)
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{
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  HARD_TASK_MODEL m;
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  PID pid;
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  hard_task_default_model(m);
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  hard_task_def_level(m,0);
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  hard_task_def_arg(m,(void*)index);
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  hard_task_def_periodic(m);
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  hard_task_def_wcet(m, CANNONE_WCET);
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  hard_task_def_mit(m,CANNONE_PERIOD);
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198
  pid = task_create("hard_cannone", cannone, &m, NULL);
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  return pid;
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}
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PID crea_soft_cannone(int index)
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{
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  SOFT_TASK_MODEL m;
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  PID pid;
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207
  soft_task_default_model(m);
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  soft_task_def_level(m,0);
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  soft_task_def_arg(m,(void*)index);
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  soft_task_def_periodic(m);
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  soft_task_def_period(m,CANNONE_PERIOD);
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  soft_task_def_wcet(m, CANNONE_WCET);
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  soft_task_def_met(m,CANNONE_MET);
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  pid = task_create("soft_cannone", cannone, &m, NULL);
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  return pid;
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}
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