X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibudev%2Flibudev-enumerate.c;h=a945758e3820088d4f2441e44acb9874805c55b4;hb=7827b1a10f4dfe2c6771b515f28f7ae22e0ae039;hp=9e6f4677e5c590cb7d5fc801c96fec4845c35313;hpb=21dbe43aece5b6fc87860de175f067b56649e7d1;p=elogind.git

diff --git a/src/libudev/libudev-enumerate.c b/src/libudev/libudev-enumerate.c
index 9e6f4677e..a945758e3 100644
--- a/src/libudev/libudev-enumerate.c
+++ b/src/libudev/libudev-enumerate.c
@@ -111,16 +111,18 @@ _public_ struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_e
  *
  * Drop a reference of an enumeration context. If the refcount reaches zero,
  * all resources of the enumeration context will be released.
+ *
+ * Returns: the passed enumeration context if it has still an active reference, or #NULL otherwise.
  **/
-_public_ void udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
+_public_ struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
 {
         unsigned int i;
 
         if (udev_enumerate == NULL)
-                return;
+                return NULL;
         udev_enumerate->refcount--;
         if (udev_enumerate->refcount > 0)
-                return;
+                return udev_enumerate;
         udev_list_cleanup(&udev_enumerate->sysattr_match_list);
         udev_list_cleanup(&udev_enumerate->sysattr_nomatch_list);
         udev_list_cleanup(&udev_enumerate->subsystem_match_list);
@@ -134,6 +136,7 @@ _public_ void udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
                 free(udev_enumerate->devices[i].syspath);
         free(udev_enumerate->devices);
         free(udev_enumerate);
+        return NULL;
 }
 
 /**