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

#define NRPARM 4

// identify state by nr (0,1,2,3)
typedef struct stateTp {
  int parm[NRPARM];
  int state;
} stateTp;


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


const int INIT = 0;

const int LEDON = 1;

const int LEDOFF = 2;

void (*stateFunc[])(struct stateTp *ss) = {init, ledOn, ledOff};
//                             state         0     1     2    ...

void init(stateTp * stateInfo)
{
  printf("\ninit\n");
  stateInfo->parm[0]++;

  sleep(1);

  stateInfo->state = LEDON;
  return;
}

void ledOn(stateTp * stateInfo)
{
  printf("\nledOn\n");
  stateInfo->parm[1]++;

  sleep(1);

  stateInfo->state = LEDOFF;
  return;
}

void ledOff(stateTp * stateInfo)
{
  printf("\nledOff\n");
  stateInfo->parm[2]++;

  sleep(1);

  stateInfo->state = LEDON;
  return;
}

int enVar;
int *ptr2enVar;


void dumpVars(stateTp * stateInfo)
{
  printf("\ndumpVars in state variable");
  for (int i = 0; i < NRPARM; i++) {
    printf("%i ", stateInfo->parm[i]);
  }
}


int main()
{
  stateTp curState;

  curState.state = INIT;

  for (int i = 0 ; i < NRPARM; i++) {
    curState.parm[i] = 0;
  }
  printf("\nstarting state machine\n");

  while (1) {
    printf("\nback in scheduler");
    dumpVars(&curState); // debug :-)
    (*stateFunc[curState.state])(&curState);
  }
}