Root/package/libnl-tiny/src/include/netlink/object.h

1/*
2 * netlink/object.c Generic Cacheable Object
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) 2003-2008 Thomas Graf <tgraf@suug.ch>
10 */
11
12#ifndef NETLINK_OBJECT_H_
13#define NETLINK_OBJECT_H_
14
15#include <netlink/netlink.h>
16#include <netlink/utils.h>
17#include <netlink/object-api.h>
18
19#ifdef __cplusplus
20extern "C" {
21#endif
22
23#define NL_OBJ_MARK 1
24
25struct nl_cache;
26struct nl_object;
27struct nl_object_ops;
28
29struct nl_object
30{
31    NLHDR_COMMON
32};
33
34#define OBJ_CAST(ptr) ((struct nl_object *) (ptr))
35
36/* General */
37extern struct nl_object * nl_object_alloc(struct nl_object_ops *);
38extern int nl_object_alloc_name(const char *,
39                             struct nl_object **);
40extern void nl_object_free(struct nl_object *);
41extern struct nl_object * nl_object_clone(struct nl_object *obj);
42extern void nl_object_get(struct nl_object *);
43extern void nl_object_put(struct nl_object *);
44extern void nl_object_dump(struct nl_object *,
45                           struct nl_dump_params *);
46extern int nl_object_identical(struct nl_object *,
47                            struct nl_object *);
48extern uint32_t nl_object_diff(struct nl_object *,
49                           struct nl_object *);
50extern int nl_object_match_filter(struct nl_object *,
51                               struct nl_object *);
52extern char * nl_object_attrs2str(struct nl_object *,
53                            uint32_t attrs, char *buf,
54                            size_t);
55/**
56 * Check whether this object is used by multiple users
57 * @arg obj object to check
58 * @return true or false
59 */
60static inline int nl_object_shared(struct nl_object *obj)
61{
62    return obj->ce_refcnt > 1;
63}
64
65
66
67/**
68 * @name Marks
69 * @{
70 */
71
72/**
73 * Add mark to object
74 * @arg obj Object to mark
75 */
76static inline void nl_object_mark(struct nl_object *obj)
77{
78    obj->ce_flags |= NL_OBJ_MARK;
79}
80
81/**
82 * Remove mark from object
83 * @arg obj Object to unmark
84 */
85static inline void nl_object_unmark(struct nl_object *obj)
86{
87    obj->ce_flags &= ~NL_OBJ_MARK;
88}
89
90/**
91 * Return true if object is marked
92 * @arg obj Object to check
93 * @return true if object is marked, otherwise false
94 */
95static inline int nl_object_is_marked(struct nl_object *obj)
96{
97    return (obj->ce_flags & NL_OBJ_MARK);
98}
99
100/** @} */
101
102/**
103 * Return list of attributes present in an object
104 * @arg obj an object
105 * @arg buf destination buffer
106 * @arg len length of destination buffer
107 *
108 * @return destination buffer.
109 */
110static inline char *nl_object_attr_list(struct nl_object *obj, char *buf, size_t len)
111{
112    return nl_object_attrs2str(obj, obj->ce_mask, buf, len);
113}
114
115
116/**
117 * @name Attributes
118 * @{
119 */
120
121static inline int nl_object_get_refcnt(struct nl_object *obj)
122{
123    return obj->ce_refcnt;
124}
125
126static inline struct nl_cache *nl_object_get_cache(struct nl_object *obj)
127{
128    return obj->ce_cache;
129}
130
131static inline void * nl_object_priv(struct nl_object *obj)
132{
133    return obj;
134}
135
136
137/** @} */
138
139
140#ifdef __cplusplus
141}
142#endif
143
144#endif
145

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