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dvr/app/jni/prboom/z_zone.c
Simon 9138ea77ab Initial Commit of all Source
2016-03-03 22:28:59 +00:00

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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* 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.
*
* DESCRIPTION:
* Zone Memory Allocation. Neat.
*
* Neat enough to be rewritten by Lee Killough...
*
* Must not have been real neat :)
*
* Made faster and more general, and added wrappers for all of Doom's
* memory allocation functions, including malloc() and similar functions.
* Added line and file numbers, in case of error. Added performance
* statistics and tunables.
*-----------------------------------------------------------------------------
*/
// use config.h if autoconf made one -- josh
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include "z_zone.h"
#include "doomstat.h"
#include "m_argv.h"
#include "v_video.h"
#include "g_game.h"
#include "lprintf.h"
#ifdef DJGPP
#include <dpmi.h>
#endif
// Tunables
// Alignment of zone memory (benefit may be negated by HEADER_SIZE, CHUNK_SIZE)
#define CACHE_ALIGN 32
// Minimum chunk size at which blocks are allocated
#define CHUNK_SIZE 32
// Minimum size a block must be to become part of a split
#define MIN_BLOCK_SPLIT (1024)
// How much RAM to leave aside for other libraries
#define LEAVE_ASIDE (128*1024)
// Amount to subtract when retrying failed attempts to allocate initial pool
#define RETRY_AMOUNT (256*1024)
// signature for block header
#define ZONEID 0x931d4a11
// Number of mallocs & frees kept in history buffer (must be a power of 2)
#define ZONE_HISTORY 4
// End Tunables
typedef struct memblock {
#ifdef ZONEIDCHECK
unsigned id;
#endif
struct memblock *next,*prev;
size_t size;
void **user;
unsigned char tag;
#ifdef INSTRUMENTED
const char *file;
int line;
#endif
} memblock_t;
/* size of block header
* cph - base on sizeof(memblock_t), which can be larger than CHUNK_SIZE on
* 64bit architectures */
static const size_t HEADER_SIZE = (sizeof(memblock_t)+CHUNK_SIZE-1) & ~(CHUNK_SIZE-1);
static memblock_t *blockbytag[PU_MAX];
// 0 means unlimited, any other value is a hard limit
//static int memory_size = 8192*1024;
static int memory_size = 0;
static int free_memory = 0;
#ifdef INSTRUMENTED
// statistics for evaluating performance
static int active_memory = 0;
static int purgable_memory = 0;
static void Z_DrawStats(void) // Print allocation statistics
{
if (gamestate != GS_LEVEL)
return;
if (memory_size > 0) {
unsigned long total_memory = free_memory + memory_size + active_memory + purgable_memory;
double s = 100.0 / total_memory;
doom_printf("%-5i\t%6.01f%%\tstatic\n"
"%-5i\t%6.01f%%\tpurgable\n"
"%-5i\t%6.01f%%\tfree\n"
"%-5li\t\ttotal\n",
active_memory,
active_memory*s,
purgable_memory,
purgable_memory*s,
(free_memory + memory_size),
(free_memory + memory_size)*s,
total_memory
);
} else {
unsigned long total_memory = active_memory + purgable_memory;
double s = 100.0 / total_memory;
doom_printf("%-5i\t%6.01f%%\tstatic\n"
"%-5i\t%6.01f%%\tpurgable\n"
"%-5li\t\ttotal\n",
active_memory,
active_memory*s,
purgable_memory,
purgable_memory*s,
total_memory
);
}
}
#ifdef HEAPDUMP
#ifndef HEAPDUMP_DIR
#define HEAPDUMP_DIR "."
#endif
void W_PrintLump(FILE* fp, void* p);
void Z_DumpMemory(void)
{
static int dump;
char buf[PATH_MAX + 1];
FILE* fp;
size_t total_cache = 0, total_free = 0, total_malloc = 0;
int tag;
sprintf(buf, "%s/memdump.%d", HEAPDUMP_DIR, dump++);
fp = fopen(buf, "w");
for (tag = PU_FREE; tag < PU_MAX; tag++)
{
memblock_t* end_block, *block;
block = blockbytag[tag];
if (!block)
continue;
end_block = block->prev;
while (1)
{
switch (block->tag) {
case PU_FREE:
fprintf(fp, "free %d\n", block->size);
total_free += block->size;
break;
case PU_CACHE:
fprintf(fp, "cache %s:%d:%d\n", block->file, block->line, block->size);
total_cache += block->size;
break;
case PU_LEVEL:
fprintf(fp, "level %s:%d:%d\n", block->file, block->line, block->size);
total_malloc += block->size;
break;
default:
fprintf(fp, "malloc %s:%d:%d", block->file, block->line, block->size);
total_malloc += block->size;
if (block->file)
if (strstr(block->file,"w_memcache.c"))
W_PrintLump(fp, (char*)block + HEADER_SIZE);
fputc('\n', fp);
break;
}
if (block == end_block)
break;
block=block->next;
}
}
fprintf(fp, "malloc %d, cache %d, free %d, total %d\n",
total_malloc, total_cache, total_free,
total_malloc + total_cache + total_free);
fclose(fp);
}
#endif
#endif
#ifdef INSTRUMENTED
// killough 4/26/98: Add history information
enum {malloc_history, free_history, NUM_HISTORY_TYPES};
static const char *file_history[NUM_HISTORY_TYPES][ZONE_HISTORY];
static int line_history[NUM_HISTORY_TYPES][ZONE_HISTORY];
static int history_index[NUM_HISTORY_TYPES];
static const char *const desc[NUM_HISTORY_TYPES] = {"malloc()'s", "free()'s"};
void Z_DumpHistory(char *buf)
{
int i,j;
char s[1024];
strcat(buf,"\n");
for (i=0;i<NUM_HISTORY_TYPES;i++)
{
sprintf(s,"\nLast several %s:\n\n", desc[i]);
strcat(buf,s);
for (j=0; j<ZONE_HISTORY; j++)
{
int k = (history_index[i]-j-1) & (ZONE_HISTORY-1);
if (file_history[i][k])
{
sprintf(s, "File: %s, Line: %d\n", file_history[i][k],
line_history[i][k]);
strcat(buf,s);
}
}
}
}
#else
void Z_DumpHistory(char *buf)
{
}
#endif
void Z_Close(void)
{
#if 0
(free)(zonebase);
zone = rover = zonebase = NULL;
#endif
}
void Z_Init(void)
{
#if 0
size_t size = zone_size*1000;
#ifdef HAVE_MMAP
return; /* cphipps - if we have mmap, we don't need our own heap */
#endif
#ifdef INSTRUMENTED
if (!(HEADER_SIZE >= sizeof(memblock_t) && size > HEADER_SIZE))
I_Error("Z_Init: Sanity check failed");
#endif
size = (size+CHUNK_SIZE-1) & ~(CHUNK_SIZE-1); // round to chunk size
size += HEADER_SIZE + CACHE_ALIGN;
// Allocate the memory
zonebase=(malloc)(size);
if (!zonebase)
I_Error("Z_Init: Failed on allocation of %lu bytes", (unsigned long)size);
lprintf(LO_INFO,"Z_Init : Allocated %lukb zone memory\n",
(long unsigned)size / 1000);
// Align on cache boundary
zone = (memblock_t *) ((char *) zonebase + CACHE_ALIGN -
((unsigned) zonebase & (CACHE_ALIGN-1)));
rover = zone; // Rover points to base of zone mem
zone->next = zone->prev = zone; // Single node
zone->size = size; // All memory in one block
zone->tag = PU_FREE; // A free block
zone->vm = 0;
#ifdef ZONEIDCHECK
zone->id = 0;
#endif
#ifdef INSTRUMENTED
free_memory = size;
/* cph - remove unnecessary initialisations to 0 */
#endif
#ifdef HEAPDUMP
atexit(Z_DumpMemory);
#endif
#endif
}
/* Z_Malloc
* You can pass a NULL user if the tag is < PU_PURGELEVEL.
*
* cph - the algorithm here was a very simple first-fit round-robin
* one - just keep looping around, freeing everything we can until
* we get a large enough space
*
* This has been changed now; we still do the round-robin first-fit,
* but we only free the blocks we actually end up using; we don't
* free all the stuff we just pass on the way.
*/
void *(Z_Malloc)(size_t size, int tag, void **user
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
memblock_t *block = NULL;
#ifdef INSTRUMENTED
#ifdef CHECKHEAP
Z_CheckHeap();
#endif
file_history[malloc_history][history_index[malloc_history]] = file;
line_history[malloc_history][history_index[malloc_history]++] = line;
history_index[malloc_history] &= ZONE_HISTORY-1;
#endif
#ifdef ZONEIDCHECK
if (tag >= PU_PURGELEVEL && !user)
I_Error ("Z_Malloc: An owner is required for purgable blocks"
#ifdef INSTRUMENTED
"Source: %s:%d", file, line
#endif
);
#endif
if (!size)
return user ? *user = NULL : NULL; // malloc(0) returns NULL
size = (size+CHUNK_SIZE-1) & ~(CHUNK_SIZE-1); // round to chunk size
if (memory_size > 0 && ((free_memory + memory_size) < (int)(size + HEADER_SIZE)))
{
memblock_t *end_block;
block = blockbytag[PU_CACHE];
if (block)
{
end_block = block->prev;
while (1)
{
memblock_t *next = block->next;
#ifdef INSTRUMENTED
(Z_Free)((char *) block + HEADER_SIZE, file, line);
#else
(Z_Free)((char *) block + HEADER_SIZE);
#endif
if (((free_memory + memory_size) >= (int)(size + HEADER_SIZE)) || (block == end_block))
break;
block = next; // Advance to next block
}
}
block = NULL;
}
#ifdef HAVE_LIBDMALLOC
while (!(block = dmalloc_malloc(file,line,size + HEADER_SIZE,DMALLOC_FUNC_MALLOC,0,0))) {
#else
while (!(block = (malloc)(size + HEADER_SIZE))) {
#endif
if (!blockbytag[PU_CACHE])
I_Error ("Z_Malloc: Failure trying to allocate %lu bytes"
#ifdef INSTRUMENTED
"\nSource: %s:%d"
#endif
,(unsigned long) size
#ifdef INSTRUMENTED
, file, line
#endif
);
Z_FreeTags(PU_CACHE,PU_CACHE);
}
if (!blockbytag[tag])
{
blockbytag[tag] = block;
block->next = block->prev = block;
}
else
{
blockbytag[tag]->prev->next = block;
block->prev = blockbytag[tag]->prev;
block->next = blockbytag[tag];
blockbytag[tag]->prev = block;
}
block->size = size;
#ifdef INSTRUMENTED
if (tag >= PU_PURGELEVEL)
purgable_memory += block->size;
else
active_memory += block->size;
#endif
free_memory -= block->size;
#ifdef INSTRUMENTED
block->file = file;
block->line = line;
#endif
#ifdef ZONEIDCHECK
block->id = ZONEID; // signature required in block header
#endif
block->tag = tag; // tag
block->user = user; // user
block = (memblock_t *)((char *) block + HEADER_SIZE);
if (user) // if there is a user
*user = block; // set user to point to new block
#ifdef INSTRUMENTED
Z_DrawStats(); // print memory allocation stats
// scramble memory -- weed out any bugs
memset(block, gametic & 0xff, size);
#endif
return block;
}
void (Z_Free)(void *p
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
memblock_t *block = (memblock_t *)((char *) p - HEADER_SIZE);
#ifdef INSTRUMENTED
#ifdef CHECKHEAP
Z_CheckHeap();
#endif
file_history[free_history][history_index[free_history]] = file;
line_history[free_history][history_index[free_history]++] = line;
history_index[free_history] &= ZONE_HISTORY-1;
#endif
if (!p)
return;
#ifdef ZONEIDCHECK
if (block->id != ZONEID)
I_Error("Z_Free: freed a pointer without ZONEID"
#ifdef INSTRUMENTED
"\nSource: %s:%d"
"\nSource of malloc: %s:%d"
, file, line, block->file, block->line
#endif
);
block->id = 0; // Nullify id so another free fails
#endif
if (block->user) // Nullify user if one exists
*block->user = NULL;
if (block == block->next)
blockbytag[block->tag] = NULL;
else
if (blockbytag[block->tag] == block)
blockbytag[block->tag] = block->next;
block->prev->next = block->next;
block->next->prev = block->prev;
free_memory += block->size;
#ifdef INSTRUMENTED
if (block->tag >= PU_PURGELEVEL)
purgable_memory -= block->size;
else
active_memory -= block->size;
/* scramble memory -- weed out any bugs */
memset(block, gametic & 0xff, block->size + HEADER_SIZE);
#endif
#ifdef HAVE_LIBDMALLOC
dmalloc_free(file,line,block,DMALLOC_FUNC_MALLOC);
#else
(free)(block);
#endif
#ifdef INSTRUMENTED
Z_DrawStats(); // print memory allocation stats
#endif
}
void (Z_FreeTags)(int lowtag, int hightag
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
#ifdef HEAPDUMP
Z_DumpMemory();
#endif
if (lowtag <= PU_FREE)
lowtag = PU_FREE+1;
if (hightag > PU_CACHE)
hightag = PU_CACHE;
for (;lowtag <= hightag; lowtag++)
{
memblock_t *block, *end_block;
block = blockbytag[lowtag];
if (!block)
continue;
end_block = block->prev;
while (1)
{
memblock_t *next = block->next;
#ifdef INSTRUMENTED
(Z_Free)((char *) block + HEADER_SIZE, file, line);
#else
(Z_Free)((char *) block + HEADER_SIZE);
#endif
if (block == end_block)
break;
block = next; // Advance to next block
}
}
}
void (Z_ChangeTag)(void *ptr, int tag
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
memblock_t *block = (memblock_t *)((char *) ptr - HEADER_SIZE);
// proff - added sanity check, this can happen when an empty lump is locked
if (!ptr)
return;
// proff - do nothing if tag doesn't differ
if (tag == block->tag)
return;
#ifdef INSTRUMENTED
#ifdef CHECKHEAP
Z_CheckHeap();
#endif
#endif
#ifdef ZONEIDCHECK
if (block->id != ZONEID)
I_Error ("Z_ChangeTag: freed a pointer without ZONEID"
#ifdef INSTRUMENTED
"\nSource: %s:%d"
"\nSource of malloc: %s:%d"
, file, line, block->file, block->line
#endif
);
if (tag >= PU_PURGELEVEL && !block->user)
I_Error ("Z_ChangeTag: an owner is required for purgable blocks\n"
#ifdef INSTRUMENTED
"Source: %s:%d"
"\nSource of malloc: %s:%d"
, file, line, block->file, block->line
#endif
);
#endif // ZONEIDCHECK
if (block == block->next)
blockbytag[block->tag] = NULL;
else
if (blockbytag[block->tag] == block)
blockbytag[block->tag] = block->next;
block->prev->next = block->next;
block->next->prev = block->prev;
if (!blockbytag[tag])
{
blockbytag[tag] = block;
block->next = block->prev = block;
}
else
{
blockbytag[tag]->prev->next = block;
block->prev = blockbytag[tag]->prev;
block->next = blockbytag[tag];
blockbytag[tag]->prev = block;
}
#ifdef INSTRUMENTED
if (block->tag < PU_PURGELEVEL && tag >= PU_PURGELEVEL)
{
active_memory -= block->size;
purgable_memory += block->size;
}
else
if (block->tag >= PU_PURGELEVEL && tag < PU_PURGELEVEL)
{
active_memory += block->size;
purgable_memory -= block->size;
}
#endif
block->tag = tag;
}
void *(Z_Realloc)(void *ptr, size_t n, int tag, void **user
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
void *p = (Z_Malloc)(n, tag, user DA(file, line));
if (ptr)
{
memblock_t *block = (memblock_t *)((char *) ptr - HEADER_SIZE);
memcpy(p, ptr, n <= block->size ? n : block->size);
(Z_Free)(ptr DA(file, line));
if (user) // in case Z_Free nullified same user
*user=p;
}
return p;
}
void *(Z_Calloc)(size_t n1, size_t n2, int tag, void **user
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
return
(n1*=n2) ? memset((Z_Malloc)(n1, tag, user DA(file, line)), 0, n1) : NULL;
}
char *(Z_Strdup)(const char *s, int tag, void **user
#ifdef INSTRUMENTED
, const char *file, int line
#endif
)
{
return strcpy((Z_Malloc)(strlen(s)+1, tag, user DA(file, line)), s);
}
void (Z_CheckHeap)(
#ifdef INSTRUMENTED
const char *file, int line
#else
void
#endif
)
{
#if 0
memblock_t *block; // Start at base of zone mem
if (block)
do { // Consistency check (last node treated special)
if ((block->next != zone &&
(memblock_t *)((char *) block+HEADER_SIZE+block->size) != block->next)
|| block->next->prev != block || block->prev->next != block)
I_Error("Z_CheckHeap: Block size does not touch the next block\n"
#ifdef INSTRUMENTED
"Source: %s:%d"
"\nSource of offending block: %s:%d"
, file, line, block->file, block->line
#endif
);
//#ifdef INSTRUMENTED
// shouldn't be needed anymore, was just for testing
#if 0
if (((int)block->file < 0x00001000) && (block->file != NULL) && (block->tag != 0)) {
block->file = NULL;
}
#endif
} while ((block=block->next) != zone);
#endif
}
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