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NeXTSTEP 3.3 (Developer)…68k, x86, SPARC, PA-RISC]
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NeXTSTEP 3.3 Dev Intel.iso
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machkit
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NXInvalidationNotifier.h
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1992-03-03
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857b
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36 lines
/*
* NXInvalidationNotifier
* allow objects to register themselves for a senderIsInvalid message
* Notification is triggered by sending "invalidate" to this object
* Copyright 1991, NeXT Computer, Inc.
*/
#import <objc/List.h>
#import <machkit/reference.h>
#import <machkit/senderIsInvalid.h>
#import <machkit/NXLock.h>
@interface NXInvalidationNotifier : Object <NXReference> {
@protected
unsigned refcount;
BOOL isValid;
NXLock *listGate;
List *funeralList;
}
- init;
- deallocate;
- invalidate;
- (BOOL) isValid;
// The target of this message will arrange to send "senderIsInvalid"
// when, indeed, the target is about to die (is invalidated).
- registerForInvalidationNotification:(id <NXSenderIsInvalid>)anObject;
// cancel the request for notification
- unregisterForInvalidationNotification:(id <NXSenderIsInvalid>)anObject;
@end