forked from osmocom/wireshark
![Alexis La Goutte](/assets/img/avatar_default.png)
(Using sed : sed -i '/^ \* \$Id\$/,+1 d') Fix manually some typo (in export_object_dicom.c and crc16-plain.c) Change-Id: I4c1ae68d1c4afeace8cb195b53c715cf9e1227a8 Reviewed-on: https://code.wireshark.org/review/497 Reviewed-by: Anders Broman <a.broman58@gmail.com>
161 lines
4.5 KiB
C
161 lines
4.5 KiB
C
/* wmem_allocator_simple.c
|
|
* Wireshark Memory Manager Simple Allocator
|
|
* Copyright 2012, Evan Huus <eapache@gmail.com>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include <glib.h>
|
|
|
|
#include "wmem_core.h"
|
|
#include "wmem_allocator.h"
|
|
#include "wmem_allocator_simple.h"
|
|
|
|
/* In this trivial allocator, we just store a GHashTable of malloc()ed
|
|
* blocks in the private_data pointer. We could just set the private_data
|
|
* pointer directly to the GHashTable, but we use a separate structure here
|
|
* to demonstrate the pattern that most other allocators should follow. */
|
|
typedef struct _wmem_simple_allocator_t {
|
|
GHashTable *block_table;
|
|
} wmem_simple_allocator_t;
|
|
|
|
static void *
|
|
wmem_simple_alloc(void *private_data, const size_t size)
|
|
{
|
|
void *buf;
|
|
wmem_simple_allocator_t *allocator;
|
|
|
|
allocator = (wmem_simple_allocator_t*) private_data;
|
|
|
|
buf = wmem_alloc(NULL, size);
|
|
|
|
g_hash_table_insert(allocator->block_table, buf, buf);
|
|
|
|
return buf;
|
|
}
|
|
|
|
static void
|
|
wmem_simple_do_free(gpointer ptr)
|
|
{
|
|
wmem_free(NULL, ptr);
|
|
}
|
|
|
|
static void
|
|
wmem_simple_free(void *private_data, void *ptr)
|
|
{
|
|
gboolean removed;
|
|
wmem_simple_allocator_t *allocator;
|
|
|
|
allocator = (wmem_simple_allocator_t*) private_data;
|
|
|
|
/* remove() takes care of calling wmem_free() for us since we set up the
|
|
* hash table with g_hash_table_new_full() */
|
|
removed = g_hash_table_remove(allocator->block_table, ptr);
|
|
|
|
g_assert(removed);
|
|
}
|
|
|
|
static void *
|
|
wmem_simple_realloc(void *private_data, void *ptr, const size_t size)
|
|
{ void *newptr;
|
|
wmem_simple_allocator_t *allocator;
|
|
|
|
allocator = (wmem_simple_allocator_t*) private_data;
|
|
|
|
newptr = wmem_realloc(NULL, ptr, size);
|
|
|
|
if (ptr != newptr) {
|
|
/* Realloc actually moved the memory block, so we need to replace the
|
|
* value in our hash table. Calling g_hash_table_remove() would trigger
|
|
* a wmem_free() which is incorrect since realloc already reclaimed the old
|
|
* block, so use g_hash_table_steal() instead. */
|
|
g_hash_table_steal(allocator->block_table, ptr);
|
|
g_hash_table_insert(allocator->block_table, newptr, newptr);
|
|
}
|
|
|
|
return newptr;
|
|
}
|
|
|
|
static void
|
|
wmem_simple_free_all(void *private_data)
|
|
{
|
|
wmem_simple_allocator_t *allocator;
|
|
|
|
allocator = (wmem_simple_allocator_t*) private_data;
|
|
|
|
/* remove_all() takes care of calling wmem_free() for us since we set up the
|
|
* hash table with g_hash_table_new_full() */
|
|
g_hash_table_remove_all(allocator->block_table);
|
|
}
|
|
|
|
static void
|
|
wmem_simple_gc(void *private_data _U_)
|
|
{
|
|
/* In this simple allocator, there is nothing to garbage-collect */
|
|
}
|
|
|
|
static void
|
|
wmem_simple_allocator_cleanup(void *private_data)
|
|
{
|
|
wmem_simple_allocator_t *allocator;
|
|
|
|
allocator = (wmem_simple_allocator_t*) private_data;
|
|
|
|
g_hash_table_destroy(allocator->block_table);
|
|
wmem_free(NULL, allocator);
|
|
}
|
|
|
|
void
|
|
wmem_simple_allocator_init(wmem_allocator_t *allocator)
|
|
{
|
|
wmem_simple_allocator_t *simple_allocator;
|
|
|
|
simple_allocator = wmem_new(NULL, wmem_simple_allocator_t);
|
|
|
|
allocator->alloc = &wmem_simple_alloc;
|
|
allocator->realloc = &wmem_simple_realloc;
|
|
allocator->free = &wmem_simple_free;
|
|
|
|
allocator->free_all = &wmem_simple_free_all;
|
|
allocator->gc = &wmem_simple_gc;
|
|
allocator->cleanup = &wmem_simple_allocator_cleanup;
|
|
|
|
allocator->private_data = (void*) simple_allocator;
|
|
|
|
simple_allocator->block_table = g_hash_table_new_full(
|
|
&g_direct_hash, &g_direct_equal, NULL, &wmem_simple_do_free);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|