#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

// EFFICIENT

// but no variable box as in sm001 and sm002
// you have to use global variables..
// Jens

// pointer til funktion af type: void * func(void)
// vi vil returnere adresse på next state via retur vaerdi
//typedef void *(*pFct)(void);

#define NEXT(x) return(x);

void * init();
void * ledOn();
void* ledOff();


void * init(void)
{
  printf("\ninit\n");

  sleep(1);

  NEXT(ledOn);
}


void * ledOn(void)
{
  printf("\nledOn\n");

  sleep(1);

  NEXT(ledOff);
}

void * ledOff(void)
{
  printf("\nledOff\n");

  sleep(1);

  NEXT(ledOn);
}

int main()
{
  //pFct statefunc = init;
  //variable that holds address of function:  void * fct(void)
  void *(*statefunc)(void) = init;

  printf("\nstarting state machine\n");

  while (1) {
    printf("\nback in scheduler");
    statefunc = (*statefunc)();
  }
}