Semáforo Contador

public class SemaforoContador {
    private int cont;
    private ReentrantLock lock;
    private Condition c;

    SemaforoContador(int cont, boolean fila){
        this.cont = cont;
        lock = new ReentrantLock(fila);
        c = lock.newCondition();
    }

    public void acquire(){
        lock.lock();
        if(cont == 0)
            c.awaitUninterruptibly();
        else
            cont--;
        lock.unlock();
    }

    public void release(){
        lock.lock();
        c.signal();
        cont++;
        lock.unlock();
    }
}