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Complete rewrite by Yoo C. Chung.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2005 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Andrew McCallum 1997-01-06 21:35:52 +00:00
parent db631fa048
commit f6a5d7b97f
2 changed files with 983 additions and 899 deletions
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208
Headers/gnustep/base/NSZone.h
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@ -1,9 +1,9 @@
/* NSZone memory management.
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
Written by: Mark Lakata <lakata@sseos.lbl.gov>
Date: January 1995
Written by: Yoo C. Chung <wacko@power1.snu.ac.kr>
Date: September 1996
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
@ -21,165 +21,93 @@
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
See NSZone.c for additional information. */
#ifndef __NSZone_h_GNUSTEP_BASE_INCLUDE
#define __NSZone_h_GNUSTEP_BASE_INCLUDE
#ifndef h_zone_NS_h
#define h_zone_NS_h
#include <objc/thr.h>
#include <gnustep/base/config.h>
#if NeXT_runtime
#include <objc/zone.h>
#define NSZone NXZone
#else
#include <stdio.h>
#include <stdlib.h>
@class NSString;
/*
* 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;
*/
typedef _objc_mutex_t ZoneLock;
typedef struct _NSZone NSZone;
#define MAXZONENAMELENGTH 20
struct _NSZone
{
unsigned granularity;
void *(*malloc)(struct _NSZone *zonep, unsigned size);
void *(*realloc)(struct _NSZone *zonep, void *ptr, unsigned size);
void (*free)(struct _NSZone *zonep, void *ptr);
void (*recycle)(struct _NSZone *zonep);
ZoneLock lock;
NSString *name;
void *table, *bblocks;
void *sblocks; /* Block with highest address comes first. */
};
typedef struct _llist {
int Count,Size;
int ElementSize;
void *LList;
} llist;
/* Create a new zone with its own memory pool.
The library will automatically set the start size and/or the
granularity if STARTSIZE and/or GRANULARITY are zero. Also, there
is no advantage in setting startSize or granularity to multiples of
NSPageSize(). */
extern NSZone*
NSCreateZone(unsigned startSize, unsigned granularity, BOOL canFree);
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);
extern NSZone *NSZoneFromPointer(void *pointer);
/*
* 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);
extern inline void *NSZoneMalloc(NSZone *zone, unsigned size)
{
return (zone->malloc)(zone, size);
}
/*
* 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 *NSZoneCalloc(NSZone *zone, unsigned numElems, unsigned numBytes);
extern void *NSZoneMalloc(NSZone *zonep, size_t size);
extern inline void *NSZoneRealloc(NSZone *zone, void *pointer, unsigned size)
{
return (zone->realloc)(zone, pointer, size);
}
extern void *NSZoneRealloc(NSZone *zonep, void *ptr, size_t size);
extern void NSZoneFree(NSZone *zonep, void *ptr);
/* For a non-freeable zone, ALL memory will be returned, regardless
of whether there are objects in it that are still in use. */
extern inline void NSRecycleZone(NSZone *zone)
{
(zone->recycle)(zone);
}
/*
* Calls NSZoneMalloc and then bzero.
*/
extern void *NSZoneCalloc(NSZone *zonep, size_t numElems, size_t byteSize);
/* Will do nothing if pointer == NULL. */
extern inline void NSZoneFree(NSZone *zone, void *pointer)
{
(zone->free)(zone, pointer);
}
/*
* 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);
extern void NSSetZoneName (NSZone *zone, NSString *name);
/*
* Debugging Helpers.
*/
extern NSString *NSZoneName (NSZone *zone);
/* Debugging Helpers. */
/*
* Will print to stdout if this pointer is in the malloc heap, free status, and size.
*/
/* 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);
/* Will verify all internal malloc information.
This is what malloc_debug calls. */
extern BOOL NSMallocCheck(void);
/*
* Give a zone a name.
* The string will be copied.
* [This function is deprecated. Use functions below instead.]
*/
extern void NSNameZone(NSZone *z, const char *name);
extern void NSSetZoneName (NSZone *z, NSString *name);
extern NSString *NSZoneName (NSZone *z);
/* Memory-Page-related functions. */
extern unsigned NSPageSize ();
extern unsigned NSLogPageSize ();
extern unsigned NSRoundUpToMultipleOfPageSize (unsigned bytes);
extern unsigned NSRoundDownToMultipleOfPageSize (unsigned bytes);
extern unsigned NSPageSize(void);
extern unsigned NSLogPageSize(void);
extern unsigned NSRoundUpToMultipleOfPageSize(unsigned bytes);
extern unsigned NSRoundDownToMultipleOfPageSize(unsigned bytes);
extern unsigned NSRealMemoryAvailable ();
extern unsigned NSRealMemoryAvailable(void);
extern void *NSAllocateMemoryPages (unsigned bytes);
extern void NSDeallocateMemoryPages (void *ptr, unsigned bytes);
extern void NSCopyMemoryPages (const void *source, void *dest, unsigned bytes);
extern void *NSAllocateMemoryPages(unsigned bytes);
extern void NSDeallocateMemoryPages(void *ptr, unsigned bytes);
extern void NSCopyMemoryPages(const void *source, void *dest, unsigned bytes);
#endif /* NeXT_runtime */
#endif /* h_zone_NS_h */
#endif /* __NSZone_h_GNUSTEP_BASE_INCLUDE */

1674
Source/NSZone.m
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