gfileattribute: Do atomic addition before checking the old value on ref

So we avoid working on a value that is not been updated yet.

1 files changed, 3 insertions, 2 deletions

diff --git a/gio/gfileattribute.c b/gio/gfileattribute.c
index aa8c61e45..124eb4d07 100644
--- a/gio/gfileattribute.c
+++ b/gio/gfileattribute.c
@@ -859,11 +859,12 @@ GFileAttributeInfoList *
 g_file_attribute_info_list_ref (GFileAttributeInfoList *list)
 {
   GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
+  int old_ref_count;
 
   g_return_val_if_fail (list != NULL, NULL);
-  g_return_val_if_fail (priv->ref_count > 0, NULL);
 
-  g_atomic_int_inc (&priv->ref_count);
+  old_ref_count = g_atomic_int_add (&priv->ref_count, 1);
+  g_return_val_if_fail (old_ref_count > 0, NULL);
 
   return list;
 }