Publisher

This class is responsible of posting Events. Posting events can be done from the Publisher directly, or outside since the method Publisher::post_event(Event*) is public.
Its interface is:

  class Publisher {
  public:
    int post_event(Event* e) ;
    void block_all_events() ;
    void unblock_all_events() ;
  } ;

and the related macro is:

  igs_emit(EVENT) ;