C#

public class Buffer
{

  private int in = 0;
  private int out = 0;
  private object[] buffer = new object[CAPACITY];
  private Semaphore full = new Semaphore(CAPACITY);
  private Semaphore empty = new Semaphore(0);
  private Semaphore mutex = new Semaphore(1);
  <br>
  public object Thing
  {
    get
    {
      mutex.WaitOne();
      empty.WaitOne();
      object t = buffer[out];
      out = (out + 1) % buffer.Length;
      full.AddOne();
      mutex.AddOne();
      return t;
    }
    set
    {
      full.WaitOne();
      mutex.WaitOne();
      object t = buffer[in];
      in = (in + 1) % buffer.Length;
      buffer[in] = value;
      mutex.AddOne();
      empty.AddOne();
    }
  }
}