+++ /dev/null
-/*
- * lib/object.c Generic Cacheable Object
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation version 2.1
- * of the License.
- *
- * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
- */
-
-/**
- * @ingroup cache
- * @defgroup object Cacheable Object
- * @{
- */
-
-#include <netlink-local.h>
-#include <netlink/netlink.h>
-#include <netlink/cache.h>
-#include <netlink/object.h>
-#include <netlink/utils.h>
-
-static inline struct nl_cache_ops *obj_ops(struct nl_object *obj)
-{
- if (!obj->ce_ops)
- BUG();
-
- return obj->ce_ops;
-}
-
-/**
- * @name Object Creation/Deletion
- * @{
- */
-
-/**
- * Allocate a cacheable object
- * @arg size size of object
- * @return The new object or NULL.
- */
-struct nl_object *nl_object_alloc(size_t size)
-{
- struct nl_object *new;
-
- if (size < sizeof(*new))
- BUG();
-
- new = calloc(1, size);
- if (!new) {
- nl_errno(ENOMEM);
- return NULL;
- }
-
- new->ce_refcnt = 1;
- nl_init_list_head(&new->ce_list);
-
- return new;
-}
-
-/**
- * Allocate a new object of kind specified by the operations handle
- * @arg ops cache operations handle
- * @return The new object or NULL
- */
-struct nl_object *nl_object_alloc_from_ops(struct nl_cache_ops *ops)
-{
- struct nl_object *new;
-
- new = nl_object_alloc(ops->co_size);
- if (new) {
- new->ce_ops = ops;
- if (ops->co_constructor)
- ops->co_constructor(new);
- }
-
- return new;
-}
-
-/**
- * Allocate a new object of kind specified by the name
- * @arg kind name of object type
- * @return The new object or nULL
- */
-struct nl_object *nl_object_alloc_name(const char *kind)
-{
- struct nl_cache_ops *ops;
-
- ops = nl_cache_mngt_lookup(kind);
- if (!ops) {
- nl_error(ENOENT, "Unable to lookup cache kind \"%s\"", kind);
- return NULL;
- }
-
- return nl_object_alloc_from_ops(ops);
-}
-
-struct nl_derived_object {
- NLHDR_COMMON
- char data;
-};
-
-/**
- * Allocate a new object and copy all data from an existing object
- * @arg obj object to inherite data from
- * @return The new object or NULL.
- */
-struct nl_object *nl_object_clone(struct nl_object *obj)
-{
- struct nl_object *new;
- struct nl_cache_ops *ops = obj_ops(obj);
- int doff = offsetof(struct nl_derived_object, data);
- int size;
-
- new = nl_object_alloc(ops->co_size);
- if (!new)
- return NULL;
-
- size = ops->co_size - doff;
- if (size < 0)
- BUG();
-
- new->ce_cache = obj->ce_cache;
- new->ce_ops = obj->ce_ops;
- new->ce_msgtype = obj->ce_msgtype;
- if (ops->co_free_data) {
- new->ce_dataref = obj;
- nl_object_get(obj);
- }
-
- if (size)
- memcpy((void *)new + doff, (void *)obj + doff, size);
-
- return new;
-}
-
-/**
- * Free a cacheable object
- * @arg obj object to free
- *
- * @return 0 or a negative error code.
- */
-void nl_object_free(struct nl_object *obj)
-{
- struct nl_cache_ops *ops = obj_ops(obj);
-
- if (obj->ce_refcnt > 0)
- NL_DBG(1, "Warning: Freeing object in used...\n");
-
- if (obj->ce_dataref)
- nl_object_put(obj->ce_dataref);
- else if (ops->co_free_data)
- ops->co_free_data(obj);
-
- free(obj);
-}
-
-/** @} */
-
-/**
- * @name Reference Management
- * @{
- */
-
-/**
- * Acquire a reference on a object
- * @arg obj object to acquire reference from
- */
-void nl_object_get(struct nl_object *obj)
-{
- obj->ce_refcnt++;
-}
-
-/**
- * Release a reference from an object
- * @arg obj object to release reference from
- */
-void nl_object_put(struct nl_object *obj)
-{
- if (!obj)
- return;
-
- obj->ce_refcnt--;
-
- if (obj->ce_refcnt < 0)
- BUG();
-
- if (obj->ce_refcnt <= 0)
- nl_object_free(obj);
-}
-
-/**
- * Check whether this object is used by multiple users
- * @arg obj object to check
- * @return true or false
- */
-int nl_object_shared(struct nl_object *obj)
-{
- return obj->ce_refcnt > 1;
-}
-
-/** @} */
-
-/**
- * @name Utillities
- * @{
- */
-
-/**
- * Dump this object according to the specified parameters
- * @arg obj object to dump
- * @arg params dumping parameters
- */
-void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
-{
- dump_from_ops(obj, params);
-}
-
-/**
- * Match a filter against an object
- * @arg obj object to check
- * @arg filter filter object
- *
- * @return 0 if the object matches the filter or non-zero
- * if no filter procedure is available or if the
- * filter does not match.
- */
-int nl_object_match(struct nl_object *obj, struct nl_object *filter)
-{
- struct nl_cache_ops *ops = obj->ce_ops;
-
- if (ops == filter->ce_ops &&
- ops->co_filter && !ops->co_filter(obj, filter))
- return 1;
- else
- return 0;
-}
-
-/** @} */
-
-/**
- * @name Access Functions
- * @{
- */
-
-/**
- * Get reference count of object
- * @arg obj object handle
- */
-int nl_object_get_refcnt(struct nl_object *obj)
-{
- return obj->ce_refcnt;
-}
-
-/**
- * Get cache operations of object
- * @arg obj object handle
- */
-struct nl_cache_ops *nl_object_get_ops(struct nl_object *obj)
-{
- return obj->ce_ops;
-}
-
-/**
- * Get cache this object is in
- * @arg obj object handle
- * @return cache handle or NULL if object is not associated to a cache
- */
-struct nl_cache *nl_object_get_cache(struct nl_object *obj)
-{
- return obj->ce_cache;
-}
-
-/**
- * Get the private data of object
- * @arg obj object handle
- */
-inline void *nl_object_priv(struct nl_object *obj)
-{
- return obj;
-}
-
-/** @} */
-
-/** @} */
git://git.onelab.eu / libnl.git / blobdiff