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/** Declaration of extension methods for base additions
Copyright (C) 2003-2010 Free Software Foundation, Inc.
Written by: Richard Frith-Macdonald <rfm@gnu.org>
and: Adam Fedor <fedor@gnu.org>
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02111 USA.
*/
#import <Foundation/NSObject.h>
#if !defined(GNUSTEP)
#define RETAIN(x) ([x retain])
#endif
@class NSHashTable;
@interface NSObject(MemoryFootprint)
/* This method returns the memory usage of the receiver, excluding any
* objects already present in the exclude table.<br />
* The argument is a hash table configured to hold non-retained pointer
* objects and is used to inform the receiver that its size should not
* be counted again if it's already in the table.<br />
* The NSObject implementation returns zero if the receiver is in the
* table, but otherwise adds itself to the table and returns its memory
* footprint (the sum of all of its instance variables, but not any
* memory pointed to by those variables).<br />
* Subclasses should override this method by calling the superclass
* implementation, and either return the result (if it was zero) or
* return that value plus the sizes of any memory owned by the receiver
* (eg found by calling the same method on objects pointed to by the
* receiver's instance variables).
*/
- (NSUInteger) sizeInBytesExcluding: (NSHashTable*)exclude;
@end
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