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 int                      nl_object_alloc_name(const char *,
  39                                                      struct nl_object **);
  40 extern void                     nl_object_free(struct nl_object *);
  41 extern struct nl_object *       nl_object_clone(struct nl_object *obj);
  42 extern void                     nl_object_get(struct nl_object *);
  43 extern void                     nl_object_put(struct nl_object *);
  44 extern void                     nl_object_dump(struct nl_object *,
  45                                                struct nl_dump_params *);
  46 extern int                      nl_object_identical(struct nl_object *,
  47                                                     struct nl_object *);
  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 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  */
  60 static 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  */
  76 static 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  */
  85 static 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  */
  95 static 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  */
 110 static 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
 121 static inline int nl_object_get_refcnt(struct nl_object *obj)
 122 {
 123         return obj->ce_refcnt;
 124 }
 125
 126 static inline struct nl_cache *nl_object_get_cache(struct nl_object *obj)
 127 {
 128         return obj->ce_cache;
 129 }
 130
 131 static 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