libnl  3.4.0
hashtable.h
1 /*
2  * netlink/hashtable.h Netlink hashtable Utilities
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation version 2.1
7  * of the License.
8  *
9  * Copyright (c) 2012 Cumulus Networks, Inc
10  */
11 
12 #ifndef NETLINK_HASHTABLE_H_
13 #define NETLINK_HASHTABLE_H_
14 
15 #include <stddef.h>
16 #include <stdint.h>
17 
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21 
22 typedef struct nl_hash_node {
23  uint32_t key;
24  uint32_t key_size;
25  struct nl_object * obj;
26  struct nl_hash_node * next;
28 
29 typedef struct nl_hash_table {
30  int size;
31  nl_hash_node_t ** nodes;
33 
34 /* Default hash table size */
35 #define NL_MAX_HASH_ENTRIES 1024
36 
37 /* Access Functions */
38 extern nl_hash_table_t * nl_hash_table_alloc(int size);
39 extern void nl_hash_table_free(nl_hash_table_t *ht);
40 
41 extern int nl_hash_table_add(nl_hash_table_t *ht,
42  struct nl_object *obj);
43 extern int nl_hash_table_del(nl_hash_table_t *ht,
44  struct nl_object *obj);
45 
46 extern struct nl_object * nl_hash_table_lookup(nl_hash_table_t *ht,
47  struct nl_object *obj);
48 extern uint32_t nl_hash(void *k, size_t length,
49  uint32_t initval);
50 
51 #ifdef __cplusplus
52 }
53 #endif
54 
55 #endif /* NETLINK_HASHTABLE_H_ */
void nl_hash_table_free(nl_hash_table_t *ht)
Free hashtable including all nodes.
Definition: hashtable.c:56
nl_hash_table_t * nl_hash_table_alloc(int size)
Allocate hashtable.
Definition: hashtable.c:29
struct nl_object * nl_hash_table_lookup(nl_hash_table_t *ht, struct nl_object *obj)
Lookup identical object in hashtable.
Definition: hashtable.c:86
int nl_hash_table_add(nl_hash_table_t *ht, struct nl_object *obj)
Add object to hashtable.
Definition: hashtable.c:117
int nl_hash_table_del(nl_hash_table_t *ht, struct nl_object *obj)
Remove object from hashtable.
Definition: hashtable.c:161