From 8a0a0b01ff00d51509cf7e9ee8ca7bd076ba7b28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Fri, 20 Mar 2026 02:15:17 +0100
Subject: [PATCH] Add MOVE_OWNERSHIP() macro for transferring pointer ownership

A helper macro that returns the current value of a pointer and sets
it to NULL in one expression, useful for transferring ownership in
designated initializers.

(cherry picked from commit 0f3be0beb8e461428466172d4b7b800933038adb)
---
 lib/isc/include/isc/util.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/isc/include/isc/util.h b/lib/isc/include/isc/util.h
index 2d507c3f7e..222dac56bc 100644
--- a/lib/isc/include/isc/util.h
+++ b/lib/isc/include/isc/util.h
@@ -47,6 +47,13 @@
  *** General Macros.
  ***/
 
+#define MOVE_OWNERSHIP(source)                             \
+	({                                                 \
+		__typeof__(source) __ownership = (source); \
+		(source) = NULL;                           \
+		__ownership;                               \
+	})
+
 /*%
  * Use this to hide unused function arguments.
  * \code