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/**
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2008 by Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Joseph Eagar
*
* ***** END GPL LICENSE BLOCK *****
*/
/*
Simple, fast memory allocator that uses many BLI_mempools for allocation.
this is meant to be used by lots of relatively small objects.
this is a temporary and imperfect fix for performance issues caused
by vgroups. it needs to be replaced with something better, preferably
integrated into guardedalloc.
Basically, it's a quick fix for vgroups and MDisps (both of which
are major performance hitters).
*/
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "BLI_blenlib.h"
#include "BLI_linklist.h"
#include "DNA_listBase.h"
#include "BLI_mempool.h"
#include "BLI_cellalloc.h" /* own include */
#include <string.h>
static BLI_mempool **pools;
static int totpool = 0;
static ListBase active_mem = {NULL, NULL};
static int celltotblock = 0;
#define MEMIDCHECK ('a' | ('b' << 4) | ('c' << 8) | ('d' << 12))
typedef struct MemHeader {
struct MemHeader *next, *prev;
int size;
const char *tag;
int idcheck;
} MemHeader;
//#define USE_GUARDEDALLOC
void *BLI_cellalloc_malloc(long size, const char *tag)
{
MemHeader *memh;
int slot = size + sizeof(MemHeader);
#ifdef USE_GUARDEDALLOC
return MEM_mallocN(size, tag);
#endif
if (!slot)
return NULL;
/*stupid optimization trick.
round up to nearest 16 bytes boundary.
this is to reduce the number of potential
pools. hopefully it'll help.*/
slot += 16 - (slot & 15);
if (slot >= totpool) {
void *tmp;
tmp = calloc(1, sizeof(void*)*(slot+1));
if (pools) {
memcpy(tmp, pools, totpool*sizeof(void*));
}
pools = tmp;
totpool = slot+1;
}
if (!pools[slot]) {
pools[slot] = BLI_mempool_create(slot, 1, 128, 1, 0);
}
memh = BLI_mempool_alloc(pools[slot]);
memh->size = size;
memh->idcheck = MEMIDCHECK;
memh->tag = tag;
BLI_addtail(&active_mem, memh);
celltotblock++;
return memh + 1;
}
void *BLI_cellalloc_calloc(long size, const char *tag)
{
void *mem = BLI_cellalloc_malloc(size, tag);
BMEMSET(mem, 0, size);
return mem;
}
void BLI_cellalloc_free(void *mem)
{
MemHeader *memh = mem;
int slot;
#ifdef USE_GUARDEDALLOC
MEM_freeN(mem);
return;
#endif
if (!memh)
return;
memh--;
if (memh->idcheck != MEMIDCHECK) {
printf("Error in BLI_cellalloc: attempt to free invalid block.\n");
return;
}
slot = memh->size + sizeof(MemHeader);
slot += 16 - (slot & 15);
if (memh->size > 0 && slot < totpool) {
BLI_remlink(&active_mem, memh);
BLI_mempool_free(pools[slot], memh);
celltotblock--;
} else {
printf("Error in BLI_cellalloc: attempt to free corrupted block.\n");
}
}
void *BLI_cellalloc_dupalloc(void *mem)
{
MemHeader *memh = mem;
void *tmp;
#ifdef USE_GUARDEDALLOC
MEM_freeN(mem);
return NULL;
#endif
if (!memh)
return NULL;
memh--;
if (memh->idcheck != MEMIDCHECK) {
printf("Error in BLI_cellalloc: attempt to free invalid block.\n");
return NULL;
}
tmp = BLI_cellalloc_malloc(memh->size, memh->tag);
memcpy(tmp, mem, memh->size);
return tmp;
}
void BLI_cellalloc_printleaks(void)
{
MemHeader *memh;
if (!active_mem.first) return;
for (memh=active_mem.first; memh; memh=memh->next) {
printf("%s %d %p\n", memh->tag, memh->size, memh+1);
}
}
int BLI_cellalloc_get_totblock(void)
{
return celltotblock;
}
void BLI_cellalloc_destroy(void)
{
int i;
for (i=0; i<totpool; i++) {
if (pools[i]) {
BLI_mempool_destroy(pools[i]);
pools[i] = NULL;
}
}
}
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