diff options
Diffstat (limited to 'lib/cache.c')
| -rw-r--r-- | lib/cache.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/lib/cache.c b/lib/cache.c index b776abf..257a41b 100644 --- a/lib/cache.c +++ b/lib/cache.c @@ -6,7 +6,7 @@ * License as published by the Free Software Foundation version 2.1 * of the License. * - * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch> + * Copyright (c) 2003-2012 Thomas Graf <tgraf@suug.ch> */ /** @@ -191,6 +191,7 @@ struct nl_cache *nl_cache_alloc(struct nl_cache_ops *ops) nl_init_list_head(&cache->c_items); cache->c_ops = ops; cache->c_flags |= ops->co_flags; + cache->c_refcnt = 1; /* * If object type provides a hash keygen @@ -365,6 +366,26 @@ void nl_cache_clear(struct nl_cache *cache) nl_cache_remove(obj); } +static void __nl_cache_free(struct nl_cache *cache) +{ + nl_cache_clear(cache); + + if (cache->hashtable) + nl_hash_table_free(cache->hashtable); + + NL_DBG(1, "Freeing cache %p <%s>...\n", cache, nl_cache_name(cache)); + free(cache); +} + +/** + * Increase reference counter of cache + * @arg cache Cache + */ +void nl_cache_get(struct nl_cache *cache) +{ + cache->c_refcnt++; +} + /** * Free a cache. * @arg cache Cache to free. @@ -379,13 +400,12 @@ void nl_cache_free(struct nl_cache *cache) if (!cache) return; - nl_cache_clear(cache); + cache->c_refcnt--; + NL_DBG(4, "Returned cache reference %p, %d remaining\n", + cache, cache->c_refcnt); - if (cache->hashtable) - nl_hash_table_free(cache->hashtable); - - NL_DBG(1, "Freeing cache %p <%s>...\n", cache, nl_cache_name(cache)); - free(cache); + if (cache->c_refcnt <= 0) + __nl_cache_free(cache); } /** @} */ |