shared: add nm_unauto() helper macro

diff --git a/shared/nm-macros-internal.h b/shared/nm-macros-internal.h
index 1eedadd..e875392 100644 (file)
--- a/shared/nm-macros-internal.h
+++ b/shared/nm-macros-internal.h
@@ -315,6 +315,18 @@ _notify (obj_type *obj, _PropertyEnums prop) \
 
 /*****************************************************************************/
 
+#define nm_unauto(pp)                                               \
+    ({                                                              \
+        G_STATIC_ASSERT (sizeof *(pp) == sizeof (gpointer));        \
+        gpointer *_pp = (gpointer *) (pp);                          \
+        gpointer _p = *_pp;                                         \
+                                                                    \
+        *_pp = NULL;                                                \
+        _p;                                                         \
+    })
+
+/*****************************************************************************/
+
 static inline gpointer
 nm_g_object_ref (gpointer obj)
 {