mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-23 14:59:47 +03:00
[project @ 2005-05-11 20:33:25 by bursa]
Remove no longer used memory pool code. svn path=/import/netsurf/; revision=1720
This commit is contained in:
James Bursa
parent
6257ee1fec
commit
5137041fed
2
makefile
2
makefile
@ -21,7 +21,7 @@ OBJECTS_COMMON = content.o fetch.o fetchcache.o url_store.o # content/
|
||||
OBJECTS_COMMON += css.o css_enum.o parser.o ruleset.o scanner.o # css/
|
||||
OBJECTS_COMMON += box.o box_construct.o box_normalise.o form.o html.o \
|
||||
html_redraw.o layout.o list.o textplain.o # render/
|
||||
OBJECTS_COMMON += messages.o pool.o talloc.o url.o utf8.o \
|
||||
OBJECTS_COMMON += messages.o talloc.o url.o utf8.o \
|
||||
utils.o # utils/
|
||||
OBJECTS_COMMON += imagemap.o loginlist.o options.o tree.o # desktop/
|
||||
|
||||
|
||||
202
utils/pool.c
202
utils/pool.c
@ -1,202 +0,0 @@
|
||||
/*
|
||||
* This file is part of NetSurf, http://netsurf.sourceforge.net/
|
||||
* Licensed under the GNU General Public License,
|
||||
* http://www.opensource.org/licenses/gpl-license
|
||||
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
|
||||
*/
|
||||
|
||||
/** \file
|
||||
* Memory pool manager (implementation).
|
||||
*
|
||||
* A memory pool is implemented as a linked list of blocks. The current
|
||||
* position and end of the last block are stored for fast access, so that
|
||||
* pool_alloc() can allocate space very fast if available.
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include "netsurf/utils/pool.h"
|
||||
|
||||
struct pool_block {
|
||||
char desc[20];
|
||||
struct pool_block *prev;
|
||||
};
|
||||
|
||||
struct pool {
|
||||
struct pool_block *last_block;
|
||||
char *current_pos;
|
||||
char *end;
|
||||
size_t block_size;
|
||||
unsigned int block_count;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Create a memory pool.
|
||||
*
|
||||
* \param block_size suggested size of each block
|
||||
* \return opaque pool handle, 0 on failure
|
||||
*/
|
||||
|
||||
pool pool_create(size_t block_size)
|
||||
{
|
||||
pool p;
|
||||
struct pool_block *b;
|
||||
|
||||
p = malloc(sizeof *p);
|
||||
if (!p)
|
||||
return 0;
|
||||
b = malloc(sizeof *b + block_size + 8);
|
||||
if (!b) {
|
||||
free(p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
p->last_block = b;
|
||||
p->current_pos = (char *) b + sizeof *b;
|
||||
p->end = (char *) b + sizeof *b + block_size;
|
||||
p->block_size = block_size;
|
||||
p->block_count = 0;
|
||||
|
||||
sprintf(b->desc, "POOL %p %u", p, p->block_count++);
|
||||
b->prev = 0;
|
||||
strcpy(p->end, "POOLEND");
|
||||
|
||||
return p;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Frees a memory pool.
|
||||
*
|
||||
* \param p a memory pool handle as returned by pool_create()
|
||||
*/
|
||||
|
||||
void pool_destroy(pool p)
|
||||
{
|
||||
struct pool_block *b, *prev;
|
||||
for (b = (struct pool_block *) p->last_block; b; b = prev) {
|
||||
prev = b->prev;
|
||||
free(b);
|
||||
}
|
||||
free(p);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Allocates space from a memory pool.
|
||||
*
|
||||
* \param p a memory pool handle as returned by pool_create()
|
||||
* \param size number of bytes to allocate
|
||||
* \return pointer to the space in the pool, 0 on failure
|
||||
*/
|
||||
|
||||
void *pool_alloc(pool p, size_t size)
|
||||
{
|
||||
void *r;
|
||||
|
||||
if (p->end < p->current_pos + size) {
|
||||
/* insufficient space: allocate new block */
|
||||
struct pool_block *b;
|
||||
size_t block_size = p->block_size;
|
||||
if (block_size < size)
|
||||
block_size += size;
|
||||
b = malloc(sizeof *b + block_size + 8);
|
||||
if (!b)
|
||||
return 0;
|
||||
|
||||
sprintf(b->desc, "POOL %p %u", p, p->block_count++);
|
||||
b->prev = p->last_block;
|
||||
strcpy(p->end, "POOLEND");
|
||||
|
||||
p->last_block = b;
|
||||
p->current_pos = (char *) b + sizeof *b;
|
||||
p->end = (char *) b + sizeof *b + block_size;
|
||||
}
|
||||
|
||||
r = p->current_pos;
|
||||
p->current_pos += size;
|
||||
return r;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Copies a string into a memory pool.
|
||||
*
|
||||
* \param p a memory pool handle as returned by pool_create()
|
||||
* \param s zero-terminated character string
|
||||
* \return pointer to the string in the pool, 0 on failure
|
||||
*/
|
||||
|
||||
char *pool_string(pool p, const char *s)
|
||||
{
|
||||
size_t len = strlen(s);
|
||||
char *buf = pool_alloc(p, len);
|
||||
if (!buf)
|
||||
return 0;
|
||||
|
||||
memcpy(buf, s, len + 1);
|
||||
return buf;
|
||||
}
|
||||
|
||||
|
||||
#ifdef TEST
|
||||
|
||||
int main(void)
|
||||
{
|
||||
unsigned int i;
|
||||
pool p1, p2;
|
||||
|
||||
puts("testing pool_create()");
|
||||
p1 = pool_create(10000);
|
||||
assert(p1);
|
||||
p2 = pool_create(1000);
|
||||
assert(p2);
|
||||
|
||||
puts("testing pool_alloc()");
|
||||
for (i = 0; i != 100000; i++) {
|
||||
size_t s = random() % 200;
|
||||
char *b1, *b2;
|
||||
unsigned int j;
|
||||
|
||||
b1 = pool_alloc(p1, s);
|
||||
//b1 = malloc(s);
|
||||
assert(b1);
|
||||
b2 = pool_alloc(p2, s);
|
||||
//b2 = malloc(s);
|
||||
assert(b2);
|
||||
for (j = 0; j != s; j++)
|
||||
b1[j] = b2[j] = i % 256;
|
||||
}
|
||||
|
||||
puts("testing pool_string()");
|
||||
for (i = 0; i != 10000; i++) {
|
||||
size_t s = random() % 200;
|
||||
char str[201];
|
||||
unsigned int j;
|
||||
char *b;
|
||||
|
||||
for (j = 0; j != s; j++)
|
||||
str[j] = 'A' + j % 26;
|
||||
str[s] = 0;
|
||||
|
||||
b = pool_string(p1, str);
|
||||
//b = strdup(str);
|
||||
assert(b);
|
||||
assert(strcmp(str, b) == 0);
|
||||
}
|
||||
|
||||
puts("testing pool_destroy() (press enter)");
|
||||
getc(stdin);
|
||||
|
||||
pool_destroy(p1);
|
||||
pool_destroy(p2);
|
||||
|
||||
puts("done");
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
38
utils/pool.h
38
utils/pool.h
@ -1,38 +0,0 @@
|
||||
/*
|
||||
* This file is part of NetSurf, http://netsurf.sourceforge.net/
|
||||
* Licensed under the GNU General Public License,
|
||||
* http://www.opensource.org/licenses/gpl-license
|
||||
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
|
||||
*/
|
||||
|
||||
/** \file
|
||||
* Memory pool manager (interface).
|
||||
*
|
||||
* A memory pool is intended for allocating memory which is required in small
|
||||
* blocks and all released together. It avoids the overhead of many small
|
||||
* malloc()s.
|
||||
*
|
||||
* Create a pool using pool_create(), and allocate memory from it using
|
||||
* pool_alloc() and pool_string(). Destroy and free the entire pool using
|
||||
* pool_destroy().
|
||||
*
|
||||
* The suggested block size should be large enough to store many allocations.
|
||||
* Use a multiple of the size of contents, if fixed. Larger allocations than
|
||||
* the block size are possible.
|
||||
*/
|
||||
|
||||
#ifndef _NETSURF_UTILS_POOL_H_
|
||||
#define _NETSURF_UTILS_POOL_H_
|
||||
|
||||
#include <stdlib.h>
|
||||
|
||||
/** Opaque memory pool handle. */
|
||||
typedef struct pool *pool;
|
||||
|
||||
pool pool_create(size_t block_size);
|
||||
void pool_destroy(pool p);
|
||||
void *pool_alloc(pool p, size_t size);
|
||||
char *pool_string(pool p, const char *s);
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user