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/* wmem_multimap.c
* Wireshark Memory Manager Hash Multimap
* Copyright 2021, John Thacker <johnthacker@gmail.com>
* Copyright 2014, Evan Huus <eapache@gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <glib.h>
#include "wmem_core.h"
#include "wmem_list.h"
#include "wmem_map.h"
#include "wmem_multimap.h"
#include "wmem_tree.h"
#include "wmem_user_cb.h"
struct _wmem_multimap_t {
wmem_map_t *map;
guint metadata_scope_cb_id;
guint data_scope_cb_id;
wmem_allocator_t *metadata_allocator;
wmem_allocator_t *data_allocator;
};
wmem_multimap_t *
wmem_multimap_new(wmem_allocator_t *allocator,
GHashFunc hash_func, GEqualFunc eql_func)
{
wmem_multimap_t *multimap;
multimap = wmem_new(allocator, wmem_multimap_t);
multimap->map = wmem_map_new(allocator, hash_func, eql_func);
multimap->metadata_allocator = allocator;
multimap->data_allocator = allocator;
return multimap;
}
static gboolean
wmem_multimap_reset_cb(wmem_allocator_t *allocator _U_, wmem_cb_event_t event,
void *user_data)
{
wmem_multimap_t *multimap = (wmem_multimap_t*)user_data;
if (event == WMEM_CB_DESTROY_EVENT) {
wmem_unregister_callback(multimap->metadata_allocator, multimap->metadata_scope_cb_id);
wmem_free(multimap->metadata_allocator, multimap);
}
return TRUE;
}
static gboolean
wmem_multimap_destroy_cb(wmem_allocator_t *allocator _U_, wmem_cb_event_t event _U_,
void *user_data)
{
wmem_multimap_t *multimap = (wmem_multimap_t*)user_data;
wmem_unregister_callback(multimap->data_allocator, multimap->data_scope_cb_id);
return FALSE;
}
wmem_multimap_t *
wmem_multimap_new_autoreset(wmem_allocator_t *metadata_scope, wmem_allocator_t *data_scope,
GHashFunc hash_func, GEqualFunc eql_func)
{
wmem_multimap_t *multimap;
multimap = wmem_new(metadata_scope, wmem_multimap_t);
multimap->map = wmem_map_new_autoreset(metadata_scope, data_scope, hash_func, eql_func);
multimap->metadata_allocator = metadata_scope;
multimap->data_allocator = data_scope;
multimap->metadata_scope_cb_id = wmem_register_callback(metadata_scope, wmem_multimap_destroy_cb, multimap);
multimap->data_scope_cb_id = wmem_register_callback(data_scope, wmem_multimap_reset_cb, multimap);
return multimap;
}
wmem_list_t*
wmem_multimap_get_keys(wmem_allocator_t *list_allocator, wmem_multimap_t *map)
{
return wmem_map_get_keys(list_allocator, map->map);
}
static void
count_nodes(gpointer key _U_, gpointer value, gpointer user_data)
{
guint* count = (guint*)user_data;
(*count) += wmem_tree_count(value);
}
guint
wmem_multimap_size(wmem_multimap_t *map)
{
guint count = 0;
wmem_map_foreach(map->map, count_nodes, &count);
return count;
}
guint
wmem_multimap_count(wmem_multimap_t *map, const void *key)
{
wmem_tree_t *tree;
if ((tree = wmem_map_lookup(map->map, key)) == NULL) {
return 0;
}
return wmem_tree_count(tree);
}
gboolean
wmem_multimap_insert32(wmem_multimap_t *map, const void *key, guint32 frame_num, void *value)
{
wmem_tree_t *tree;
gboolean ret = TRUE;
if ((tree = wmem_map_lookup(map->map, key)) == NULL) {
tree = wmem_tree_new(map->data_allocator);
wmem_map_insert(map->map, key, tree);
ret = FALSE;
}
wmem_tree_insert32(tree, frame_num, value);
return ret;
}
void *
wmem_multimap_lookup32(wmem_multimap_t *map, const void *key, guint32 frame_num)
{
wmem_tree_t *tree;
if ((tree = wmem_map_lookup(map->map, key)) == NULL) {
return NULL;
}
return wmem_tree_lookup32(tree, frame_num);
}
void *
wmem_multimap_lookup32_le(wmem_multimap_t *map, const void *key, guint32 frame_num)
{
wmem_tree_t *tree;
if ((tree = wmem_map_lookup(map->map, key)) == NULL) {
return NULL;
}
return wmem_tree_lookup32_le(tree, frame_num);
}
void *
wmem_multimap_remove32(wmem_multimap_t *map, const void *key, const guint32 frame_num)
{
wmem_tree_t *tree;
if ((tree = wmem_map_lookup(map->map, key)) == NULL) {
return NULL;
}
return wmem_tree_remove32(tree, frame_num);
}
/*
* Editor modelines - https://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:
*/
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