#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
long z1=0;
int z2=0;
volatile long z3=0;

DWORD WINAPI watek1(void *v)
{
      int i;
      while(1)
      {
          z1=z1+3;
          z1--;
          z1--;
          z1--;


          z2=z2+3;
          z2--;
          z2--;
          z2--;

          InterlockedExchangeAdd(&z3,3);
          InterlockedDecrement(&z3);
          InterlockedDecrement(&z3);
          InterlockedDecrement(&z3);

      }

}




DWORD WINAPI watek2(void *v)
{

      while(1)
      {
          z1=z1+3;
          z1--;
          z1--;
          z1--;


          z2=z2+3;
          z2--;
          z2--;
          z2--;

          InterlockedExchangeAdd(&z3,3);
          InterlockedDecrement(&z3);
          InterlockedDecrement(&z3);
          InterlockedDecrement(&z3);
      }

}



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

int i;
//DWORD IdWatku1, IdWatku2, IdWatku3;
HANDLE watek_a, watek_b;


watek_a = CreateThread(NULL, 0, watek1, 0, 0, 0);
//SetThreadPriority(watek_a,0);

watek_b=CreateThread(NULL, 0, watek2, 0, 0,0);
//SetThreadPriority(watek_b,-1);
//watek_c=CreateThread(NULL, 0, watek3, 0,0,0);
//SetThreadPriority(watek_c,-2);

for(i=1;i<1000;i++)
   {
   Sleep(1000);
   printf("z1= %d \t z2=%d \t z3=%d \n",z1,z2,z3);

   }


  system("PAUSE");
  return 0;
}