public class BB_prod-cons<E>
{
	private int BUFFER_SIZE;
	private E[] buffer;
	private int in, out;

	// constructor	
	public BB_prod-cons(int size) {
		in = 0;
		out = 0;
		elements = new E[size];
	}


	// producer calls this method
	public void insert(E item) {
		while ((in + 1) % BUFFER_SIZE == out)
			; // do nothing -- no free space
		// add an item to the buffer
		buffer[in] = item;
		in = (in + 1) % BUFFER_SIZE;
	}

	// consumer calls this method
	public E remove() {
		E item;

		while (in == out)
			; // do nothing - nothing to consume
		// remove an item from the buffer
		item = buffer[out];
		out = (out + 1) % BUFFER_SIZE;
		return item;
	}
}