Class slot_base

boost::signalslib::slot_base — Base class for slots.

Synopsis

class slot_base {
public:
  // types
  typedef std::vector<weak_ptr<void> >   tracked_container_type;
  typedef std::vector<shared_ptr<void> > locked_container_type; 

  // tracking
  bool expired() const;
  locked_container_type lock() const;
  const tracked_container_type & tracked_objects() const;
};

Description

slot_base tracking

  1. bool expired() const;
    Returns:

    true if any tracked object has expired.

    		 
  2. locked_container_type lock() const;
    Returns: A container holding shared_ptrs to each of the slot's tracked objects. As long as the returned container is kept in scope, none of the slot's tracked objects can expire.
    Throws: expired_slot if any of the slot's tracked objects have expired. 
  3. const tracked_container_type & tracked_objects() const;
    Returns: A const reference to the slot's list of tracked objects, in weak_ptr form.