#ifndef OBSERVER_H
#define OBSERVER_H

struct observer;

/* normal_stop notifications.  */
typedef void (observer_normal_stop_ftype) (void);

extern struct observer *
  observer_attach_normal_stop (observer_normal_stop_ftype *f);
extern void observer_detach_normal_stop (struct observer *observer);
extern void observer_notify_normal_stop (void);

#endif /* OBSERVER_H */