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/* $Header: /local/src/CVS/nickle/mem.h,v 1.17 2004/12/11 06:02:23 keithp Exp $ */
/*
* Copyright © 1988-2004 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
#ifndef _MEM_H_
#define _MEM_H_
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef MEM_TRACE
typedef struct _DataType DataType;
#else
typedef const struct _DataType DataType;
#endif
#if LOCAL_BUILD
#include "stack.h"
#else
#include <nickle/stack.h>
#endif
struct _DataType {
void (*Mark) (void *);
int (*Free) (void *);
char *name;
#ifdef MEM_TRACE
int added;
int total;
int active;
long long total_bytes;
long long active_bytes;
DataType *next;
#endif
};
struct bfree {
DataType *type;
struct bfree *next;
};
typedef unsigned long PtrInt;
struct block {
struct block *next;
int sizeIndex;
};
/* make sure we can store doubles in blocks */
union block_round {
struct block b;
double round;
};
# define MINHUNK (sizeof (struct bfree))
# define NUMSIZES 12
# define HUNKSIZE(i) (MINHUNK << (i))
# define MAXHUNK HUNKSIZE(NUMSIZES-1)
# define HEADSIZE (sizeof (union block_round))
# define HUNKS(b) ((unsigned char *) (b) + HEADSIZE)
#if HAVE_C_INLINE
#define USE_C_INLINE 1
#endif
struct bfree *
MemAllocateHunk (int sizeIndex);
struct bfree *
MemAllocateHuge (int size);
#ifndef USE_C_INLINE
void
*MemAllocate (DataType *type, int size);
void
*MemAllocateRef (DataType *type, int size);
#endif
#ifdef MEM_TRACE
void
MemAddType (DataType *type);
void
MemActiveDump (void);
#endif
void
MemInitialize (void);
void
MemAddRoot (void *object);
void
MemReference (void *object);
int
MemReferenceNoRecurse (void *object);
void
MemCollect (void);
/*
* These are used by the mem system and defined externally
*/
void
debug (char *, ...);
void
panic (char *, ...);
extern StackObject *MemStack;
extern void *TemporaryData;
extern struct bfree *freeList[NUMSIZES];
#define REFERENCE(o) STACK_PUSH(MemStack, (o))
#define ENTER() StackPointer __stackPointer = STACK_TOP(MemStack)
#define ALLOCATE(type,size) MemAllocateRef(type,size)
#define EXIT() STACK_RESET(MemStack, __stackPointer)
#define RETURN(r) return (STACK_RETURN (MemStack, __stackPointer, (r)))
#define NOREFRETURN(r) return (EXIT(), (r))
#if USE_C_INLINE || MEM_NEED_ALLOCATE
/*
* Allocator entry point
*/
#if USE_C_INLINE
static inline struct bfree *
#else
static struct bfree *
#endif
_MemAllocateInt (DataType *type, int size)
{
int sizeIndex = 0;
struct bfree *new;
#if NUMSIZES > 15
bad NUMSIZES
#endif
#ifdef MEM_TRACE
if (!type->added)
MemAddType (type);
type->total++;
type->total_bytes += size;
type->active++;
type->active_bytes += size;
#endif
if (size > HUNKSIZE(7))
sizeIndex += 8;
if (size > HUNKSIZE(sizeIndex+3))
sizeIndex += 4;
if (size > HUNKSIZE(sizeIndex+1))
sizeIndex += 2;
if (size > HUNKSIZE(sizeIndex))
sizeIndex += 1;
if (sizeIndex >= NUMSIZES)
new = MemAllocateHuge (size);
else if ((new = freeList[sizeIndex]))
freeList[sizeIndex] = new->next;
else
new = MemAllocateHunk (sizeIndex);
return new;
}
#if USE_C_INLINE
static inline void *
#else
void *
#endif
MemAllocateRef (DataType *type, int size)
{
struct bfree *new = _MemAllocateInt (type, size);
new->type = 0;
REFERENCE (new);
new->type = type;
return (void *) new;
}
#if USE_C_INLINE
static inline void *
#else
void *
#endif
MemAllocate (DataType *type, int size)
{
struct bfree *new = _MemAllocateInt (type, size);
new->type = type;
return (void *) new;
}
#endif /* USE_C_INLINE */
#endif /* _MEM_H_ */
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