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New alloc set code using a memory block pool for small allocations.

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Jan
This commit is contained in:
Jan Wieck
1999-02-06 16:50:34 +00:00
parent 7d2b3874aa
commit ead64f317b
13 changed files with 1666 additions and 314 deletions
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32
src/include/utils/memutils.h
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@@ -15,7 +15,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: memutils.h,v 1.19 1998/12/26 18:15:53 momjian Exp $
* $Id: memutils.h,v 1.20 1999/02/06 16:50:33 wieck Exp $
*
* NOTES
* some of the information in this file will be moved to
@@ -208,13 +208,41 @@ typedef enum AllocMode
#define DefaultAllocMode DynamicAllocMode
/*
* AllocBlock --
* Small pieces of memory are taken from bigger blocks of
* memory with a size aligned to a power of two. These
* pieces are not free's separately, instead they are reused
* for the next allocation of a fitting size.
*/
typedef struct AllocBlockData {
struct AllocSetData *aset;
struct AllocBlockData *next;
char *freeptr;
char *endptr;
} AllocBlockData;
typedef AllocBlockData *AllocBlock;
/*
* AllocChunk --
* The prefix of each piece of memory in an AllocBlock
*/
typedef struct AllocChunkData {
void *aset;
Size size;
} AllocChunkData;
typedef AllocChunkData *AllocChunk;
/*
* AllocSet --
* Allocation set.
*/
typedef struct AllocSetData
{
OrderedSetData setData;
struct AllocBlockData *blocks;
struct AllocChunkData *freelist[8];
/* Note: this will change in the future to support other modes */
} AllocSetData;

26
src/include/utils/palloc.h
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@@ -6,18 +6,34 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: palloc.h,v 1.6 1998/09/01 04:39:24 momjian Exp $
* $Id: palloc.h,v 1.7 1999/02/06 16:50:34 wieck Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PALLOC_H
#define PALLOC_H
#include <c.h>
#include "c.h"
extern void *palloc(Size size);
extern void pfree(void *pointer);
extern void *repalloc(void *pointer, Size size);
#ifdef PALLOC_IS_MALLOC
# define palloc(s) malloc(s)
# define pfree(p) free(p)
# define repalloc(p,s) realloc((p),(s))
#else /* ! PALLOC_IS_MALLOC */
/* ----------
* In the case we use memory contexts, use macro's for palloc() etc.
* ----------
*/
# include "utils/mcxt.h"
# define palloc(s) ((void *)MemoryContextAlloc(CurrentMemoryContext,(Size)(s)))
# define pfree(p) MemoryContextFree(CurrentMemoryContext,(Pointer)(p))
# define repalloc(p,s) ((void *)MemoryContextRealloc(CurrentMemoryContext,(Pointer)(p),(Size)(s)))
#endif /* PALLOC_IS_MALLOC */
/* like strdup except uses palloc */
extern char *pstrdup(char *pointer);

6
src/include/utils/portal.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: portal.h,v 1.10 1998/09/01 04:39:25 momjian Exp $
* $Id: portal.h,v 1.11 1999/02/06 16:50:34 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -44,8 +44,8 @@ typedef PortalD *Portal;
struct PortalD
{
char *name; /* XXX PortalName */
struct PortalVariableMemory variable;
struct PortalHeapMemory heap;
struct PortalVariableMemoryData variable;
struct PortalHeapMemoryData heap;
QueryDesc *queryDesc;
TupleDesc attinfo;
EState *state;