mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-13 07:59:04 +08:00
425d593ebe
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk/trunk@2 d0cd1f9f-072b-0410-8dd7-cf729c803f20
532 lines
17 KiB
C++
532 lines
17 KiB
C++
/**********************************************************************
|
|
* File: memry.c (Formerly memory.c)
|
|
* Description: Memory allocation with builtin safety checks.
|
|
* Author: Ray Smith
|
|
* Created: Wed Jan 22 09:43:33 GMT 1992
|
|
*
|
|
* (C) Copyright 1992, Hewlett-Packard Ltd.
|
|
** Licensed under the Apache License, Version 2.0 (the "License");
|
|
** you may not use this file except in compliance with the License.
|
|
** You may obtain a copy of the License at
|
|
** http://www.apache.org/licenses/LICENSE-2.0
|
|
** Unless required by applicable law or agreed to in writing, software
|
|
** distributed under the License is distributed on an "AS IS" BASIS,
|
|
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
** See the License for the specific language governing permissions and
|
|
** limitations under the License.
|
|
*
|
|
**********************************************************************/
|
|
|
|
#include "mfcpch.h"
|
|
#include <stdlib.h>
|
|
#ifdef __UNIX__
|
|
#include <assert.h>
|
|
#endif
|
|
#include "stderr.h"
|
|
#include "tprintf.h"
|
|
#include "memblk.h"
|
|
#include "memry.h"
|
|
|
|
//#define COUNTING_CLASS_STRUCTURES
|
|
|
|
/**********************************************************************
|
|
* new
|
|
*
|
|
* Replace global new to get at memory leaks etc.
|
|
**********************************************************************/
|
|
/*
|
|
void* operator new( //allocate memory
|
|
size_t size //amount to allocate
|
|
)
|
|
{
|
|
if (size==0)
|
|
{
|
|
err.log(RESULT_LOGICAL_ERROR,E_LOC,ERR_PRIMITIVES,
|
|
ERR_SCROLLING,ERR_CONTINUE,ERR_ERROR,
|
|
"Zero requested of new");
|
|
size=1;
|
|
}
|
|
return alloc_big_mem(size);
|
|
}
|
|
|
|
void operator delete( //free memory
|
|
void* addr //mem to free
|
|
)
|
|
{
|
|
free_big_mem(addr);
|
|
}*/
|
|
|
|
/**********************************************************************
|
|
* check_mem
|
|
*
|
|
* Check consistency of all memory controlled by alloc_mem.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void check_mem( //check consistency
|
|
const char *string, //context message
|
|
INT8 level //level of check
|
|
) {
|
|
big_mem.check (string, level);
|
|
main_mem.check (string, level);
|
|
check_structs(level);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_string
|
|
*
|
|
* Allocate space for a string. The space can only be used for chars as
|
|
* it is not aligned. Allocation is guaranteed to be fast and not cause
|
|
* fragmentation for small strings (upto 10*worst alignment). Calls for
|
|
* larger strings will be satisfied with alloc_mem.
|
|
* Use free_string to free the space from alloc_string.
|
|
**********************************************************************/
|
|
|
|
DLLSYM char *alloc_string( //allocate string
|
|
INT32 count //no of chars required
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
char *string; //allocated string
|
|
|
|
if (count < 1 || count > MAX_CHUNK) {
|
|
tprintf ("Invalid size %d requested of alloc_string", count);
|
|
return NULL;
|
|
}
|
|
|
|
count++; //add size byte
|
|
if (count <= MAX_STRUCTS * sizeof (MEMUNION)) {
|
|
string = (char *) alloc_struct (count, "alloc_string");
|
|
//get a fast structure
|
|
if (string == NULL) {
|
|
tprintf ("No memory for alloc_string");
|
|
return NULL;
|
|
}
|
|
string[0] = (INT8) count; //save its length
|
|
}
|
|
else {
|
|
//get a big block
|
|
string = (char *) alloc_mem (count);
|
|
if (string == NULL) {
|
|
tprintf ("No memory for alloc_string");
|
|
return NULL;
|
|
}
|
|
string[0] = 0; //mark its id
|
|
}
|
|
return &string[1]; //string for user
|
|
#else
|
|
return static_cast<char*>(malloc(count));
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* free_string
|
|
*
|
|
* Free a string allocated by alloc_string.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void free_string( //free a string
|
|
char *string //string to free
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
if (((ptrdiff_t) string & 3) == 1) { //one over word
|
|
string--; //get id marker
|
|
if (*string == 0) {
|
|
free_mem(string); //generally free it
|
|
return;
|
|
}
|
|
else if (*string <= MAX_STRUCTS * sizeof (MEMUNION)) {
|
|
//free structure
|
|
free_struct (string, *string, "alloc_string");
|
|
return;
|
|
}
|
|
}
|
|
tprintf ("Non-string given to free_string");
|
|
#else
|
|
free(string);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_struct
|
|
*
|
|
* Allocate space for a structure. This function is designed to be
|
|
* fast and fragmentation free for arbitrary combinations of small
|
|
* objects. (Upto 40 bytes in length.)
|
|
* It can be used for any size of object up to 512K, but you must use
|
|
* free_struct to release the memory it gives. alloc_mem is better
|
|
* for arbitrary data blocks of large size (>40 bytes.)
|
|
* alloc_struct always aborts if the allocation fails.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void *
|
|
alloc_struct ( //allocate memory
|
|
INT32 count, //no of chars required
|
|
#if defined COUNTING_CLASS_STRUCTURES
|
|
const char *name //name of type
|
|
#else
|
|
const char * //name of type
|
|
#endif
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
MEMUNION *element; //current element
|
|
MEMUNION *returnelement; //return value
|
|
INT32 struct_count; //no of required structs
|
|
INT32 blocksize; //no of structs in block
|
|
INT32 index; //index to structure
|
|
|
|
if (count < 1 || count > MAX_CHUNK) {
|
|
tprintf ("Invalid size %d requested of alloc_struct", count);
|
|
return NULL;
|
|
}
|
|
|
|
// tprintf("Allocating structure of size %d\n",count);
|
|
//no of MEMUNIONS-1
|
|
struct_count = (count - 1) / sizeof (MEMUNION);
|
|
if (struct_count < MAX_STRUCTS) {
|
|
//can do fixed sizes
|
|
#ifdef COUNTING_CLASS_STRUCTURES
|
|
if (name != NULL) {
|
|
index = identify_struct_owner (struct_count, name);
|
|
if (index < MAX_CLASSES)
|
|
owner_counts[struct_count][index]++;
|
|
}
|
|
#endif
|
|
//head of freelist
|
|
returnelement = free_structs[struct_count];
|
|
if (returnelement == NULL) {
|
|
//need a new block
|
|
//get one
|
|
element = (MEMUNION *) new_struct_block ();
|
|
if (element == NULL) {
|
|
tprintf ("No memory to satisfy request for %d", (int) count);
|
|
return NULL;
|
|
}
|
|
//add to block list
|
|
element->ptr = struct_blocks[struct_count];
|
|
struct_blocks[struct_count] = element;
|
|
blocks_in_use[struct_count]++;
|
|
element++; //free cell
|
|
returnelement = element; //going to return 1st
|
|
blocksize = STRUCT_BLOCK_SIZE / (struct_count + 1) - 1;
|
|
|
|
for (index = 1; index < blocksize; index++) {
|
|
//make links
|
|
element->ptr = element + struct_count + 1;
|
|
element += struct_count + 1;
|
|
}
|
|
element->ptr = NULL; //end of freelist
|
|
}
|
|
//new free one
|
|
free_structs[struct_count] = returnelement->ptr;
|
|
//count number issued
|
|
structs_in_use[struct_count]++;
|
|
}
|
|
else {
|
|
//just get some
|
|
returnelement = (MEMUNION *) alloc_mem (count);
|
|
if (returnelement == NULL) {
|
|
tprintf ("No memory to satisfy request for %d", (int) count);
|
|
return NULL;
|
|
}
|
|
}
|
|
return returnelement; //free cell
|
|
#else
|
|
return malloc(count);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* free_struct
|
|
*
|
|
* Free memory allocated by alloc_struct. The size must be supplied.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void
|
|
free_struct ( //free a structure
|
|
void *deadstruct, //structure to free
|
|
INT32 count, //no of bytes
|
|
#if defined COUNTING_CLASS_STRUCTURES
|
|
const char *name //name of type
|
|
#else
|
|
const char * //name of type
|
|
#endif
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
MEMUNION *end_element; //current element
|
|
MEMUNION *element; //current element
|
|
MEMUNION *prev_element; //previous element
|
|
MEMUNION *prev_block; //previous element
|
|
MEMUNION *nextblock; //next block in list
|
|
MEMUNION *block; //next block in list
|
|
INT32 struct_count; //no of required structs
|
|
INT32 index; //to structure counts
|
|
|
|
if (count < 1 || count > MAX_CHUNK) {
|
|
tprintf ("Invalid size %d requested of free_struct", count);
|
|
return;
|
|
}
|
|
|
|
// tprintf("Freeing structure of size %d\n",count);
|
|
//no of MEMUNIONS-1
|
|
struct_count = (count - 1) / sizeof (MEMUNION);
|
|
|
|
if (deadstruct == NULL) {
|
|
//not really legal
|
|
check_struct(MEMCHECKS, count);
|
|
}
|
|
else {
|
|
if (struct_count < MAX_STRUCTS) {
|
|
//can do fixed sizes
|
|
#ifdef COUNTING_CLASS_STRUCTURES
|
|
if (name != NULL) {
|
|
index = identify_struct_owner (struct_count, name);
|
|
if (index < MAX_CLASSES) {
|
|
owner_counts[struct_count][index]--;
|
|
ASSERT_HOST (owner_counts[struct_count][index] >= 0);
|
|
}
|
|
}
|
|
#endif
|
|
element = (MEMUNION *) deadstruct;
|
|
//add to freelist
|
|
element->ptr = free_structs[struct_count];
|
|
free_structs[struct_count] = element;
|
|
//one less in use
|
|
structs_in_use[struct_count]--;
|
|
if (structs_in_use[struct_count] == 0) {
|
|
index = 0;
|
|
for (element = struct_blocks[struct_count];
|
|
element != NULL; element = nextblock) {
|
|
//traverse and destroy
|
|
nextblock = element->ptr;
|
|
//free all the blocks
|
|
old_struct_block(element);
|
|
index++;
|
|
}
|
|
//none left any more
|
|
struct_blocks[struct_count] = NULL;
|
|
//no free structs
|
|
free_structs[struct_count] = NULL;
|
|
blocks_in_use[struct_count] = 0;
|
|
}
|
|
else if (structs_in_use[struct_count] < 0) {
|
|
tprintf ("Negative number of structs of size %d in use",
|
|
(int) count);
|
|
}
|
|
else if (structs_in_use[struct_count] < blocks_in_use[struct_count]) {
|
|
prev_block = NULL;
|
|
for (block = struct_blocks[struct_count];
|
|
block != NULL; block = nextblock) {
|
|
nextblock = block;
|
|
index = STRUCT_BLOCK_SIZE / (struct_count + 1) - 1;
|
|
end_element = block + STRUCT_BLOCK_SIZE;
|
|
for (element = free_structs[struct_count];
|
|
element != NULL; element = element->ptr) {
|
|
if (element > nextblock && element < end_element) {
|
|
index--;
|
|
if (index == 0)
|
|
break;
|
|
}
|
|
}
|
|
if (index == 0) {
|
|
index = STRUCT_BLOCK_SIZE / (struct_count + 1) - 1;
|
|
for (element =
|
|
free_structs[struct_count], prev_element = NULL;
|
|
element != NULL; element = element->ptr) {
|
|
if (element > nextblock && element < end_element) {
|
|
index--;
|
|
if (prev_element != NULL)
|
|
prev_element->ptr = element->ptr;
|
|
else
|
|
free_structs[struct_count] = element->ptr;
|
|
if (index == 0)
|
|
break;
|
|
}
|
|
else
|
|
prev_element = element;
|
|
}
|
|
if (prev_block != NULL)
|
|
prev_block->ptr = block->ptr;
|
|
else
|
|
struct_blocks[struct_count] = block->ptr;
|
|
nextblock = block->ptr;
|
|
blocks_in_use[struct_count]--;
|
|
//free all the blocks
|
|
old_struct_block(block);
|
|
}
|
|
else {
|
|
prev_block = block;
|
|
//traverse and destroy
|
|
nextblock = block->ptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
free_mem(deadstruct); //free directly
|
|
}
|
|
#else
|
|
free(deadstruct);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_mem_p
|
|
*
|
|
* Allocate permanent space which will never be returned.
|
|
* This space is allocated from the top end of a memory block to
|
|
* avoid the fragmentation which would result from alternate use
|
|
* of alloc_mem for permanent and temporary blocks.
|
|
**********************************************************************/
|
|
|
|
//#ifdef __UNIX__
|
|
//#pragma OPT_LEVEL 0
|
|
//#endif
|
|
DLLSYM void *alloc_mem_p( //allocate permanent space
|
|
INT32 count //block size to allocate
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
#ifdef TESTING_BIGSTUFF
|
|
if (main_mem.biggestblock == 0)
|
|
main_mem.init (alloc_big_mem, free_big_mem,
|
|
FIRSTSIZE, LASTSIZE, MAX_CHUNK);
|
|
#else
|
|
if (main_mem.biggestblock == 0)
|
|
main_mem.init ((void *(*)(INT32)) malloc, free,
|
|
FIRSTSIZE, LASTSIZE, MAX_CHUNK);
|
|
#endif
|
|
if (mem_mallocdepth > 0)
|
|
return main_mem.alloc_p (count, trace_caller (mem_mallocdepth));
|
|
else
|
|
return main_mem.alloc_p (count, NULL);
|
|
#else
|
|
return malloc ((size_t) count);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_mem
|
|
*
|
|
* Return a pointer to a buffer of count bytes aligned for any type.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void *alloc_mem( //get some memory
|
|
INT32 count //no of bytes to get
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
#ifdef TESTING_BIGSTUFF
|
|
if (main_mem.biggestblock == 0)
|
|
main_mem.init (alloc_big_mem, free_big_mem,
|
|
FIRSTSIZE, LASTSIZE, MAX_CHUNK);
|
|
#else
|
|
if (main_mem.biggestblock == 0)
|
|
main_mem.init ((void *(*)(INT32)) malloc, free,
|
|
FIRSTSIZE, LASTSIZE, MAX_CHUNK);
|
|
#endif
|
|
if (mem_mallocdepth > 0)
|
|
return main_mem.alloc (count, trace_caller (mem_mallocdepth));
|
|
else
|
|
return main_mem.alloc (count, NULL);
|
|
#else
|
|
return malloc ((size_t) count);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_big_mem
|
|
*
|
|
* Return a pointer to a buffer of count bytes aligned for any type.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void *alloc_big_mem( //get some memory
|
|
INT32 count //no of bytes to get
|
|
) {
|
|
#ifdef TESTING_BIGSTUFF
|
|
if (big_mem.biggestblock == 0)
|
|
big_mem.init ((void *(*)(INT32)) malloc, free,
|
|
BIGSIZE, BIGSIZE, MAX_BIGCHUNK);
|
|
if (mem_mallocdepth > 0)
|
|
return big_mem.alloc (count, trace_caller (mem_mallocdepth));
|
|
else
|
|
return big_mem.alloc (count, NULL);
|
|
#else
|
|
return malloc ((size_t) count);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* alloc_big_zeros
|
|
*
|
|
* Return a pointer to a buffer of count bytes aligned for any type.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void *alloc_big_zeros( //get some memory
|
|
INT32 count //no of bytes to get
|
|
) {
|
|
#ifdef TESTING_BIGSTUFF
|
|
if (big_mem.biggestblock == 0)
|
|
big_mem.init ((void *(*)(INT32)) malloc, free,
|
|
BIGSIZE, BIGSIZE, MAX_BIGCHUNK);
|
|
void *buf; //return value
|
|
|
|
if (mem_mallocdepth > 0)
|
|
buf = big_mem.alloc (count, trace_caller (mem_mallocdepth));
|
|
else
|
|
buf = big_mem.alloc (count, NULL);
|
|
memset (buf, 0, count);
|
|
return buf;
|
|
#else
|
|
return calloc ((size_t) count, 1);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* free_mem
|
|
*
|
|
* Free a block allocated by alloc_mem (or alloc_mem_p).
|
|
* It checks that the pointer is legal and maintains counts of the
|
|
* amount of free memory above and below the current free pointer.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void free_mem( //free mem from alloc_mem
|
|
void *oldchunk //chunk to free
|
|
) {
|
|
#ifdef RAYS_MALLOC
|
|
if (mem_freedepth > 0 && main_mem.callers != NULL)
|
|
main_mem.dealloc (oldchunk, trace_caller (mem_freedepth));
|
|
else
|
|
main_mem.dealloc (oldchunk, NULL);
|
|
#else
|
|
free(oldchunk);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* free_big_mem
|
|
*
|
|
* Free a block allocated by alloc_big_mem.
|
|
* It checks that the pointer is legal and maintains counts of the
|
|
* amount of free memory above and below the current free pointer.
|
|
**********************************************************************/
|
|
|
|
DLLSYM void free_big_mem( //free mem from alloc_mem
|
|
void *oldchunk //chunk to free
|
|
) {
|
|
#ifdef TESTING_BIGSTUFF
|
|
if (mem_freedepth > 0 && main_mem.callers != NULL)
|
|
big_mem.dealloc (oldchunk, trace_caller (mem_freedepth));
|
|
else
|
|
big_mem.dealloc (oldchunk, NULL);
|
|
#else
|
|
free(oldchunk);
|
|
#endif
|
|
}
|