*: Add a hash_clean_and_free() function

Add a hash_clean_and_free() function as well as convert
the code to use it.  This function also takes a double
pointer to the hash to set it NULL.  Also it cleanly
does nothing if the pointer is NULL( as a bunch of
code tested for ).

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/hash.c b/lib/hash.c
index 97a77a2b9a..df56243985 100644
--- a/lib/hash.c
+++ b/lib/hash.c
@@ -297,6 +297,16 @@ void hash_clean(struct hash *hash, void (*free_func)(void *))
 	hash->stats.empty = hash->size;
 }
 
+void hash_clean_and_free(struct hash **hash, void (*free_func)(void *))
+{
+	if (!*hash)
+		return;
+
+	hash_clean(*hash, free_func);
+	hash_free(*hash);
+	*hash = NULL;
+}
+
 static void hash_to_list_iter(struct hash_bucket *hb, void *arg)
 {
 	struct list *list = arg;