forked from osmocom/wireshark
197 lines
4.5 KiB
C
197 lines
4.5 KiB
C
/* wmem_core.c
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* Wireshark Memory Manager Core
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* Copyright 2012, Evan Huus <eapache@gmail.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include "wmem_core.h"
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#include "wmem_scopes.h"
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#include "wmem_allocator.h"
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#include "wmem_allocator_simple.h"
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#include "wmem_allocator_block.h"
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#include "wmem_allocator_strict.h"
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void *
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wmem_alloc(wmem_allocator_t *allocator, const size_t size)
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{
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if (allocator == NULL) {
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return g_malloc(size);
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}
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if (size == 0) {
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return NULL;
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}
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return allocator->alloc(allocator->private_data, size);
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}
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void *
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wmem_alloc0(wmem_allocator_t *allocator, const size_t size)
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{
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void *buf;
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if (size == 0) {
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return NULL;
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}
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buf = wmem_alloc(allocator, size);
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memset(buf, 0, size);
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return buf;
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}
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void
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wmem_free(wmem_allocator_t *allocator, void *ptr)
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{
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if (allocator == NULL) {
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g_free(ptr);
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return;
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}
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if (ptr == NULL) {
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return;
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}
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allocator->free(allocator->private_data, ptr);
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}
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void *
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wmem_realloc(wmem_allocator_t *allocator, void *ptr, const size_t size)
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{
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if (allocator == NULL) {
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return g_realloc(ptr, size);
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}
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if (ptr == NULL) {
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return wmem_alloc(allocator, size);
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}
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if (size == 0) {
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wmem_free(allocator, ptr);
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return NULL;
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}
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return allocator->realloc(allocator->private_data, ptr, size);
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}
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void
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wmem_free_all(wmem_allocator_t *allocator)
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{
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allocator->free_all(allocator->private_data);
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}
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void
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wmem_gc(wmem_allocator_t *allocator)
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{
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allocator->gc(allocator->private_data);
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}
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void
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wmem_destroy_allocator(wmem_allocator_t *allocator)
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{
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wmem_free_all(allocator);
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allocator->destroy(allocator);
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}
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wmem_allocator_t *
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wmem_allocator_new(const wmem_allocator_type_t type)
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{
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const char *override;
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wmem_allocator_t *allocator;
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wmem_allocator_type_t real_type;
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/* Our valgrind script uses this environment variable to override the
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* usual allocator choice so that everything goes through system-level
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* allocations that it understands and can track. Otherwise it will get
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* confused by the block allocator etc. */
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override = getenv("WIRESHARK_DEBUG_WMEM_OVERRIDE");
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if (override == NULL) {
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real_type = type;
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}
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else if (strncmp(override, "simple", strlen("simple")) == 0) {
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real_type = WMEM_ALLOCATOR_SIMPLE;
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}
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else if (strncmp(override, "block", strlen("block")) == 0) {
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real_type = WMEM_ALLOCATOR_BLOCK;
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}
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else if (strncmp(override, "strict", strlen("strict")) == 0) {
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real_type = WMEM_ALLOCATOR_STRICT;
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}
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else {
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g_warning("Unrecognized wmem override");
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real_type = type;
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}
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switch (real_type) {
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case WMEM_ALLOCATOR_SIMPLE:
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allocator = wmem_simple_allocator_new();
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break;
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case WMEM_ALLOCATOR_BLOCK:
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allocator = wmem_block_allocator_new();
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break;
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case WMEM_ALLOCATOR_STRICT:
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allocator = wmem_strict_allocator_new();
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break;
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default:
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g_assert_not_reached();
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/* This is necessary to squelch MSVC errors; is there
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any way to tell it that g_assert_not_reached()
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never returns? */
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return NULL;
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};
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allocator->type = real_type;
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return allocator;
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}
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void
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wmem_init(void)
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{
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wmem_init_scopes();
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}
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void
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wmem_cleanup(void)
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{
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wmem_cleanup_scopes();
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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