ar71xx: ag71xx: make switch register access atomic
[openwrt.git] / 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
20 extern "C" {
21 #endif
22
23 #define NL_OBJ_MARK 1
24
25 struct nl_cache;
26 struct nl_object;
27 struct nl_object_ops;
28
29 struct nl_object
30 {
31 NLHDR_COMMON
32 };
33
34 #define OBJ_CAST(ptr) ((struct nl_object *) (ptr))
35
36 /* General */
37 extern struct nl_object * nl_object_alloc(struct nl_object_ops *);
38 extern void nl_object_free(struct nl_object *);
39 extern struct nl_object * nl_object_clone(struct nl_object *obj);
40
41 #ifdef disabled
42
43 extern int nl_object_alloc_name(const char *,
44 struct nl_object **);
45 extern void nl_object_dump(struct nl_object *,
46 struct nl_dump_params *);
47
48 extern uint32_t nl_object_diff(struct nl_object *,
49 struct nl_object *);
50 extern int nl_object_match_filter(struct nl_object *,
51 struct nl_object *);
52 extern int nl_object_identical(struct nl_object *,
53 struct nl_object *);
54 extern char * nl_object_attrs2str(struct nl_object *,
55 uint32_t attrs, char *buf,
56 size_t);
57 #endif
58 /**
59 * Check whether this object is used by multiple users
60 * @arg obj object to check
61 * @return true or false
62 */
63 static inline int nl_object_shared(struct nl_object *obj)
64 {
65 return obj->ce_refcnt > 1;
66 }
67
68
69 static inline void nl_object_get(struct nl_object *obj)
70 {
71 obj->ce_refcnt++;
72 }
73
74 static inline void nl_object_put(struct nl_object *obj)
75 {
76 if (!obj)
77 return;
78
79 obj->ce_refcnt--;
80
81 if (obj->ce_refcnt <= 0)
82 nl_object_free(obj);
83 }
84
85
86 /**
87 * @name Marks
88 * @{
89 */
90
91 /**
92 * Add mark to object
93 * @arg obj Object to mark
94 */
95 static inline void nl_object_mark(struct nl_object *obj)
96 {
97 obj->ce_flags |= NL_OBJ_MARK;
98 }
99
100 /**
101 * Remove mark from object
102 * @arg obj Object to unmark
103 */
104 static inline void nl_object_unmark(struct nl_object *obj)
105 {
106 obj->ce_flags &= ~NL_OBJ_MARK;
107 }
108
109 /**
110 * Return true if object is marked
111 * @arg obj Object to check
112 * @return true if object is marked, otherwise false
113 */
114 static inline int nl_object_is_marked(struct nl_object *obj)
115 {
116 return (obj->ce_flags & NL_OBJ_MARK);
117 }
118
119 /** @} */
120
121 #ifdef disabled
122 /**
123 * Return list of attributes present in an object
124 * @arg obj an object
125 * @arg buf destination buffer
126 * @arg len length of destination buffer
127 *
128 * @return destination buffer.
129 */
130 static inline char *nl_object_attr_list(struct nl_object *obj, char *buf, size_t len)
131 {
132 return nl_object_attrs2str(obj, obj->ce_mask, buf, len);
133 }
134 #endif
135
136 /**
137 * @name Attributes
138 * @{
139 */
140
141 static inline int nl_object_get_refcnt(struct nl_object *obj)
142 {
143 return obj->ce_refcnt;
144 }
145
146 static inline struct nl_cache *nl_object_get_cache(struct nl_object *obj)
147 {
148 return obj->ce_cache;
149 }
150
151 static inline void * nl_object_priv(struct nl_object *obj)
152 {
153 return obj;
154 }
155
156
157 /** @} */
158
159
160 #ifdef __cplusplus
161 }
162 #endif
163
164 #endif
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