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OF_ASSUME_NONNULL_BEGIN
@class OFMutableDictionary OF_GENERIC(KeyType, ObjectType);
#ifdef OF_HAVE_THREADS
@class OFMutex;
#endif
@class OFNotificationCenterHandle;
#ifdef OF_HAVE_BLOCKS
/**
* @brief A block which is called when a notification has been posted.
*
* @param notification The notification that has been posted
*/
typedef void (^OFNotificationCenterBlock)(OFNotification *notification);
#endif
/**
* @class OFNotificationCenter OFNotificationCenter.h \
* ObjFW/OFNotificationCenter.h
*
* @brief A class to send and register for notifications.
*/
@interface OFNotificationCenter: OFObject
{
#ifdef OF_HAVE_THREADS
OFMutex *_mutex;
#endif
OFMutableDictionary *_notifications;
OFMutableDictionary *_handles;
OF_RESERVE_IVARS(OFNotificationCenter, 4)
}
#ifdef OF_HAVE_CLASS_PROPERTIES
@property (class, readonly, nonatomic) OFNotificationCenter *defaultCenter;
#endif
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* @param name The name that was specified when adding the observer
* @param object The object that was specified when adding the observer
*/
- (void)removeObserver: (id)observer
selector: (SEL)selector
name: (OFNotificationName)name
object: (nullable id)object;
#ifdef OF_HAVE_BLOCKS
/**
* @brief Adds an observer for the specified notification and object.
*
* To remove the observer again, use @ref removeObserver:.
*
* @param name The name of the notification to observe
* @param object The object that should be sending the notification, or `nil`
* if the object should be ignored to determine what
* notifications to deliver
* @param block The block to handle notifications
* @return An opaque object to remove the observer again
*/
- (OFNotificationCenterHandle *)
addObserverForName: (OFNotificationName)name
object: (nullable id)object
usingBlock: (OFNotificationCenterBlock)block;
/**
* @brief Removes an observer. The specified observer must be one returned by
* @ref addObserver:selector:name:object:.
*
* @param observer The object that was returned when adding the observer
*/
- (void)removeObserver: (OFNotificationCenterHandle *)observer;
#endif
/**
* @brief Posts the specified notification.
*
* @param notification The notification to post
*/
- (void)postNotification: (OFNotification *)notification;
@end
OF_ASSUME_NONNULL_END
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