2 * lib/object.c Generic Cacheable Object
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
9 * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
14 * @defgroup object Object
18 #include <netlink-local.h>
19 #include <netlink/netlink.h>
20 #include <netlink/cache.h>
21 #include <netlink/object.h>
22 #include <netlink/utils.h>
24 static inline struct nl_object_ops
*obj_ops(struct nl_object
*obj
)
33 * @name Object Creation/Deletion
38 * Allocate a new object of kind specified by the operations handle
39 * @arg ops cache operations handle
40 * @return The new object or NULL
42 struct nl_object
*nl_object_alloc(struct nl_object_ops
*ops
)
44 struct nl_object
*new;
46 if (ops
->oo_size
< sizeof(*new))
49 new = calloc(1, ops
->oo_size
);
54 nl_init_list_head(&new->ce_list
);
57 if (ops
->oo_constructor
)
58 ops
->oo_constructor(new);
60 NL_DBG(4, "Allocated new object %p\n", new);
65 struct nl_derived_object
{
71 * Allocate a new object and copy all data from an existing object
72 * @arg obj object to inherite data from
73 * @return The new object or NULL.
75 struct nl_object
*nl_object_clone(struct nl_object
*obj
)
77 struct nl_object
*new;
78 struct nl_object_ops
*ops
= obj_ops(obj
);
79 int doff
= offsetof(struct nl_derived_object
, data
);
82 new = nl_object_alloc(ops
);
86 size
= ops
->oo_size
- doff
;
90 new->ce_ops
= obj
->ce_ops
;
91 new->ce_msgtype
= obj
->ce_msgtype
;
94 memcpy((void *)new + doff
, (void *)obj
+ doff
, size
);
97 if (ops
->oo_clone(new, obj
) < 0) {
101 } else if (size
&& ops
->oo_free_data
)
108 * Free a cacheable object
109 * @arg obj object to free
111 * @return 0 or a negative error code.
113 void nl_object_free(struct nl_object
*obj
)
115 struct nl_object_ops
*ops
= obj_ops(obj
);
117 if (obj
->ce_refcnt
> 0)
118 NL_DBG(1, "Warning: Freeing object in use...\n");
121 nl_cache_remove(obj
);
123 if (ops
->oo_free_data
)
124 ops
->oo_free_data(obj
);
128 NL_DBG(4, "Freed object %p\n", obj
);
134 * @name Reference Management