gistfile1.c++

class TimerCallback
{
    public:
        virtual ~TimerCallback() {}
        virtual void callback() = 0;
};

class Timer
{
private:
	vector<TimerCallback>;//stack of callbacks
	
    public:
		init();//etc...
		update();//go through and call the callback when needed
};

class Child :  public TimerCallback
{
    public:
        virtual void callback()
        {
            //do stuff
        }
};