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Initial revision
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@176 72102866-910b-0410-8b05-ffd578937521
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Headers/gnustep/base/NSZone.h
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Headers/gnustep/base/NSZone.h
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/* NSZone memory management.
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Copyright (C) 1994 NeXT Computer, Inc.
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This file is part of the GNU Objective C Class Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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See NSZone.c for additional information. */
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#ifndef h_zone_NS_h
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#define h_zone_NS_h
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#ifdef __NeXT__
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#import <objc/zone.h>
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#define NSZone NXZone
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#else
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#include <stdio.h>
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#include <stdlib.h>
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/*
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* This the NeXTStep zone typedef. It is nothing like the implementation
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* below.
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*/
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/*
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typedef struct _NSZone {
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void *(*realloc)(struct _NSZone *zonep, void *ptr, size_t size);
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void *(*malloc)(struct _NSZone *zonep, size_t size);
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void (*free)(struct _NSZone *zonep, void *ptr);
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void (*destroy)(struct _NSZone *zonep);
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} NSZone;
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*/
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#define MAXZONENAMELENGTH 20
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typedef struct _llist {
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int Count,Size;
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int ElementSize;
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void *LList;
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} llist;
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typedef struct _NSZone {
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void *base;
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size_t size;
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size_t granularity;
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int canFree;
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char name[MAXZONENAMELENGTH+1];
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llist heap;
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struct _NSZone *parent;
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} NSZone;
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/*
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* try to find the page size. If these fail on your system,
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* consider some other methods used by Emacs. See the file
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* getpagesize.h of the Emacs source code
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*/
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#ifndef vm_page_size
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#include <unistd.h>
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#ifdef _SC_PAGESIZE
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#define vm_page_size sysconf(_SC_PAGESIZE)
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#else
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#ifdef _SC_PAGE_SIZE
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#define vm_page_size sysconf(_SC_PAGE_SIZE)
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#else
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#ifndef HAVE_LIBC_H
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int getpagesize(void);
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#endif /* not HAVE_LIBC_H */
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#define vm_page_size getpagesize()
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#endif /* _SC_PAGE_SIZE */
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#endif /* _SC_PAGESIZE */
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#endif /* vm_page_size */
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#define NS_NOZONE ((NSZone *)0)
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/*
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* Returns the default zone used by the malloc(3) calls.
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*/
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extern NSZone *NSDefaultMallocZone(void);
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/*
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* Create a new zone with its own memory pool.
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* If canfree is 0 the allocator will never free memory and mallocing will be fast
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*/
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extern NSZone *NSCreateZone(size_t startSize, size_t granularity, int canFree);
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/*
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* Create a new zone who obtains memory from another zone.
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* Returns NS_NOZONE if the passed zone is already a child.
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*/
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extern NSZone *NSCreateChildZone(NSZone *parentZone, size_t startSize,
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size_t granularity, int canFree);
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/*
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* The zone is destroyed and all memory reclaimed.
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*/
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extern void NSDestroyZone(NSZone *zonep);
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/*
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* Will merge zone with the parent zone. Malloced areas are still valid.
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* Must be an child zone.
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*/
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extern void NSMergeZone(NSZone *zonep);
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extern void *NSZoneMalloc(NSZone *zonep, size_t size);
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extern void *NSZoneRealloc(NSZone *zonep, void *ptr, size_t size);
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extern void NSZoneFree(NSZone *zonep, void *ptr);
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/*
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* Calls NSZoneMalloc and then bzero.
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*/
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extern void *NSZoneCalloc(NSZone *zonep, size_t numElems, size_t byteSize);
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/*
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* Returns the zone for a pointer.
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* NS_NOZONE if not in any zone.
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* The ptr must have been returned from a malloc or realloc call.
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*/
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extern NSZone *NSZoneFromPtr(void *ptr);
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/*
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* Debugging Helpers.
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*/
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/*
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* Will print to stdout if this pointer is in the malloc heap, free status, and size.
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*/
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extern void NSZonePtrInfo(void *ptr);
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/*
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* Will verify all internal malloc information.
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* This is what malloc_debug calls.
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*/
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extern int NSMallocCheck(void);
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/*
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* Give a zone a name.
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*
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* The string will be copied.
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*/
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extern void NSNameZone(NSZone *z, const char *name);
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#endif /* __NeXT__ */
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#endif /* h_zone_NS_h */
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