int Set_Scheduling_Policy( int policy, int quantum )
{
   return -1;
}

unsigned long Get_Time( void )
{
   return -1;
}

int Init_Semaphore(char *name, int initval)
{
   return -1;
}

int P(int sid)
{
   return -1;
}

int V(int sid)
{
   return -1;
}

int Finish_Semaphore(int sid)
{
   return -1;
}