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1120 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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 *   (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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/*
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 * Copyright (C) 2000 Paolo Gai
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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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 *
1547 pj 37
 * CVS :        $Id: mdemo.c,v 1.3 2005-01-08 14:31:38 pj Exp $
1120 pj 38
 
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 This test verify the correctness of the NOP module. It works with the
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 PI, PC, SRP module, too.
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 The test uses one mutex
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 the main task (NRT) creates three tasks.
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 J1 with PC priority 0
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   starts at t=0.5 sec and lock m0
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 J2 with PC priority 1
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   starts at t=1 sec and doesn't lock any mutex
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 J3 with PC priority 2
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   it starts and locks m0
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   at t=2 sec it unlocks m1
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 The example is similar to the scheduling diagram shown at p. 188 of the
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 book "Sistemi in tempo Reale", by Giorgio Buttazzo, Pitagora Editrice
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*/
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#include "kernel/kern.h"
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#include "modules/srp.h"
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mutex_t  m0;
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void startJ(void *a)
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{
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  task_activate((PID)a);
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}
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TASK j1()
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{
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  cprintf("J1: before locking   m0\n");
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  mutex_lock(&m0);
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  cprintf("J1: locked           m0\n");
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  mutex_unlock(&m0);
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  cprintf("J1: unlocked         m0, end task\n");
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  return 0;
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}
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TASK j2()
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{
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  cprintf("J2: waiting t=1.5 sec\n");
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  while (sys_gettime(NULL) < 1500000);
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  cprintf("J2: end task\n");
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  return 0;
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}
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TASK j3()
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{
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  cprintf("J3: before locking   m0\n");
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  mutex_lock(&m0);
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  cprintf("J3: locked           m0, waiting to t=2 sec\n");
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  while (sys_gettime(NULL) < 2000000);
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  cprintf("J3: t = 1 sec reached, unlocking m0\n");
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  mutex_unlock(&m0);
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  cprintf("J3: unlocked         m0, end task\n");
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  return 0;
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}
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int main(int argc, char **argv)
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{
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  struct timespec t;
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  HARD_TASK_MODEL m;
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  PID      p0,p1,p2;
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  PC_mutexattr_t  a;
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  PI_mutexattr_t  a2;
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  NOP_mutexattr_t a3;
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  SRP_mutexattr_t a4;
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  NPP_mutexattr_t a5;
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  PC_RES_MODEL r;
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  SRP_RES_MODEL srp;
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  /* ---------------------------------------------------------------------
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     Mutex creation
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     --------------------------------------------------------------------- */
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  PC_mutexattr_default(a,0);
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  PI_mutexattr_default(a2);
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  NOP_mutexattr_default(a3);
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  SRP_mutexattr_default(a4);
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  NPP_mutexattr_default(a5);
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  mutex_init(&m0,&a4);
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  /* ---------------------------------------------------------------------
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     Task creation
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     --------------------------------------------------------------------- */
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  hard_task_default_model(m);
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  hard_task_def_wcet(m,20000);
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  hard_task_def_mit(m,10000000);
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  PC_res_default_model(r,0);
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  SRP_res_default_model(srp,3);
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  p0 = task_createn("J1", j1, (TASK_MODEL *)&m, &r, &srp, SRP_usemutex(&m0), NULL);
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  if (p0 == NIL)
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  { cprintf("Can't create J1 task...\n"); return 1; }
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  hard_task_def_wcet(m,1600000);
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  hard_task_def_mit(m,21000000);
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  PC_res_default_model(r,1);
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  SRP_res_default_model(srp,2);
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  p1 = task_createn("J2", j2, (TASK_MODEL *)&m, &r, &srp, NULL);
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  if (p1 == NIL)
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  { cprintf("Can't create J2 task...\n"); return 1; }
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  hard_task_def_wcet(m,3000000);
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  hard_task_def_mit(m,100000000);
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  PC_res_default_model(r,2);
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  SRP_res_default_model(srp,1);
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  p2 = task_createn("J3", j3, (TASK_MODEL *)&m, &r, &srp, SRP_usemutex(&m0), NULL);
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  if (p2 == NIL)
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  { cprintf("Can't create J3 task...\n"); return 1; }
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  /* ---------------------------------------------------------------------
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     Event post
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     --------------------------------------------------------------------- */
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  t.tv_sec = 0;
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  t.tv_nsec = 500000000;
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  kern_cli();
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  kern_event_post(&t,startJ,(void *)p0);
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  t.tv_sec = 1;
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  kern_event_post(&t,startJ,(void *)p1);
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  kern_sti();
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  task_activate(p2);
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  do {
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    sys_gettime(&t);
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  } while (t.tv_sec < 60);
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1547 pj 186
  exit(0);
1120 pj 187
 
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  return 0;
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}