#include <iostream.h>

#include <thread.h>
#include <countsem.h>



// Counting Semaphore initialized to 10

CountingSemaphore sem1;
CountingSemaphore sem2(1);



class Daughter : public Thread {

public:
  Daughter() { }

protected:
  void Run(void) {

    while(1) {
      sem2.P();
      cout << "Daughter: Just did a P" << endl;
      sem1.V();
   
    }
  }
};



int main(void) {

  Daughter daughter;
  daughter.Start();

  while(1) {
    sem1.P();
    cout << "Mother: Just did a P" << endl;
    sem2.V();
  }

  Thread::Join(&daughter);

  return 0;
}