Listener.hh

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#ifndef COSA_LISTENER_HH
#define COSA_LISTENER_HH

#include "Cosa/Linkage.hh"

template <typename T>
class Listener : public Link {
public:
  Listener(T key) :
    Link(),
    m_key(key)
  {}

  T key() const
  {
    return (m_key);
  }

  void key(T key)
  {
    m_key = key;
  }

  bool match(T key) const
  {
    return (m_key == key);
  }

  static void dispatch(Head* head, T key, uint8_t type, uint16_t value);

private:
  T m_key;
};

template <typename T>
void
Listener<T>::dispatch(Head* head, T key, uint8_t type, uint16_t value)
{
  Linkage* link = head->succ();
  while (link != head) {
    Listener<T>* listener = (Listener<T>*) link;
    if (listener->match(key)) listener->on_event(type, value);
    link = link->succ();
  }
}
#endif