// PingPongOS - PingPong Operating System
// Prof. Carlos A. Maziero, DINF UFPR
// Versão 1.1 -- Julho de 2016

// barreira de sincronização para N threads

#include <stdio.h>
#include <stdlib.h>
#include "ppos.h"

task_t Pang, Peng, Ping, Pong, Pung ;
barrier_t b ;

// corpo das threads
void Body (void * arg)
{
   int sleepTime ;

   printf ("%5d ms: %s: inicio\n", systime(), (char *) arg) ;

   sleepTime = random() % 20000 ;
   printf ("%5d ms: %s: dorme %ds\n", systime(), (char *) arg, sleepTime) ;
   task_sleep (sleepTime) ;

   printf ("%5d ms: %s: chega na barreira\n", systime(), (char *) arg) ;
   barrier_join (&b) ;
   printf ("%5d ms: %s: passa da barreira\n", systime(), (char *) arg) ;

   printf ("%5d ms: %s: fim\n", systime(), (char *) arg) ;
   task_exit (0) ;
}

int main (int argc, char *argv[])
{
   ppos_init () ;

   printf ("%5d ms: main: inicio\n", systime()) ;

   // cria barreira
   barrier_create (&b, 6) ; // main + pang + peng + ... + pung = 6

   // cria tarefas
   task_create (&Pang, Body, "    Pang") ;
   task_create (&Peng, Body, "        Peng") ;
   task_create (&Ping, Body, "            Ping") ;
   task_create (&Pong, Body, "                Pong") ;
   task_create (&Pung, Body, "                    Pung") ;

   printf ("%5d ms: main: chega na barreira\n", systime()) ;
   barrier_join (&b) ;
   printf ("%5d ms: main: passa da barreira\n", systime()) ;

   printf ("%5d ms: main: fim\n", systime()) ;
   task_exit (0) ;

   exit (0) ;
}