observer.h

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#ifndef MUTT_MUTT_OBSERVER_H
#define MUTT_MUTT_OBSERVER_H
 
#include <stdbool.h>
#include "notify_type.h"
#include "queue.h"

struct NotifyCallback
{
  struct Notify  *current;       
  enum NotifyType event_type;    
  int             event_subtype; 
  void           *event_data;    
  void           *global_data;   
};

typedef int (*observer_t)(struct NotifyCallback *nc);

struct Observer
{
  enum NotifyType type;  
  observer_t callback;   
  void *global_data;     
};

struct ObserverNode
{
  struct Observer *observer;          
  STAILQ_ENTRY(ObserverNode) entries; 
};
STAILQ_HEAD(ObserverList, ObserverNode);
 
#endif /* MUTT_MUTT_OBSERVER_H */