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/* NSZone memory management.
Copyright (C) 1995 Free Software Foundation, Inc.
Written by: Mark Lakata <lakata@sseos.lbl.gov>
Date: January 1995
This file is part of the GNU Objective C Class Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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 Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
See NSZone.c for additional information. */
#ifndef h_zone_NS_h
#define h_zone_NS_h
#if NeXT_runtime
#import <objc/zone.h>
#define NSZone NXZone
#else
#include <stdio.h>
#include <stdlib.h>
/*
* This the NeXTStep zone typedef. It is nothing like the implementation
* below.
*/
/*
typedef struct _NSZone {
void *(*realloc)(struct _NSZone *zonep, void *ptr, size_t size);
void *(*malloc)(struct _NSZone *zonep, size_t size);
void (*free)(struct _NSZone *zonep, void *ptr);
void (*destroy)(struct _NSZone *zonep);
} NSZone;
*/
#define MAXZONENAMELENGTH 20
typedef struct _llist {
int Count,Size;
int ElementSize;
void *LList;
} llist;
typedef struct _NSZone {
void *base;
size_t size;
size_t granularity;
int canFree;
char name[MAXZONENAMELENGTH+1];
llist heap;
struct _NSZone *parent;
} NSZone;
/*
* try to find the page size. If these fail on your system,
* consider some other methods used by Emacs. See the file
* getpagesize.h of the Emacs source code
*/
#ifndef vm_page_size
# include <unistd.h>
# ifdef _SC_PAGESIZE
# define vm_page_size sysconf(_SC_PAGESIZE)
# else
# ifdef _SC_PAGE_SIZE
# define vm_page_size sysconf(_SC_PAGE_SIZE)
# else
/* # ifndef HAVE_LIBC_H */
/* suggested change by Gregor Hoffleit <flight@mathi.uni-heidelberg.DE> */
# if !defined(HAVE_LIBC_H) && !defined(linux)
int getpagesize(void);
# endif /* not HAVE_LIBC_H */
# define vm_page_size getpagesize()
# endif /* _SC_PAGE_SIZE */
# endif /* _SC_PAGESIZE */
#endif /* vm_page_size */
#define NS_NOZONE ((NSZone *)0)
/*
* Returns the default zone used by the malloc(3) calls.
*/
extern NSZone *NSDefaultMallocZone(void);
/*
* Create a new zone with its own memory pool.
* If canfree is 0 the allocator will never free memory and mallocing will be fast
*/
extern NSZone *NSCreateZone(size_t startSize, size_t granularity, int canFree);
/*
* Create a new zone who obtains memory from another zone.
* Returns NS_NOZONE if the passed zone is already a child.
*/
extern NSZone *NSCreateChildZone(NSZone *parentZone, size_t startSize,
size_t granularity, int canFree);
/*
* The zone is destroyed and all memory reclaimed.
*/
extern void NSDestroyZone(NSZone *zonep);
/*
* Will merge zone with the parent zone. Malloced areas are still valid.
* Must be an child zone.
*/
extern void NSMergeZone(NSZone *zonep);
extern void *NSZoneMalloc(NSZone *zonep, size_t size);
extern void *NSZoneRealloc(NSZone *zonep, void *ptr, size_t size);
extern void NSZoneFree(NSZone *zonep, void *ptr);
/*
* Calls NSZoneMalloc and then bzero.
*/
extern void *NSZoneCalloc(NSZone *zonep, size_t numElems, size_t byteSize);
/*
* Returns the zone for a pointer.
* NS_NOZONE if not in any zone.
* The ptr must have been returned from a malloc or realloc call.
*/
extern NSZone *NSZoneFromPtr(void *ptr);
/*
* Debugging Helpers.
*/
/*
* Will print to stdout if this pointer is in the malloc heap, free status, and size.
*/
extern void NSZonePtrInfo(void *ptr);
/*
* Will verify all internal malloc information.
* This is what malloc_debug calls.
*/
extern int NSMallocCheck(void);
/*
* Give a zone a name.
*
* The string will be copied.
*/
extern void NSNameZone(NSZone *z, const char *name);
#endif /* __NeXT__ */
#endif /* h_zone_NS_h */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.