// demo interleavings/schedules
// but no shared variables and no interfere
#include <stdio.h>
#include <sys/types.h>
#include <sys/shm.h>
#include <errno.h>

int *x;
int *y;

// int MAX = 10;
int MAX = 1000;

C0() {
  int i;
  int tmp;
  for (i=1; i<=MAX; i++) {
    *x = *x + 1;
    printf("x = %d\n", *x);
  }
  exit(1);
}

C1() {
  int i;
  for (i=1; i<=MAX; i++) {
    *y = *y + 1;
    printf("           y = %d\n", *y);
  }
  // exit(1);
}

main() {
  int pid;
  x = (int *) malloc(sizeof(int));
  y = (int *) malloc(sizeof(int));

  *x = 0;
  *y = 0;

  pid = fork();
  if (pid == 0) {
    C0();
  }
  else {
    C1();
    return 0;
  }
}