From 42a6d5d30c4f9cca3913996f6cccf6dd383a3fd3 Mon Sep 17 00:00:00 2001

Message-Id: <42a6d5d30c4f9cca3913996f6cccf6dd383a3fd3@dist-git>

From: Peter Krempa <pkrempa@redhat.com>

Date: Wed, 24 Aug 2016 16:11:10 -0400

Subject: [PATCH] internal: Introduce macro for stealing pointers

https://bugzilla.redhat.com/show_bug.cgi?id=1097930

https://bugzilla.redhat.com/show_bug.cgi?id=1224341

VIR_STEAL_PTR copies the pointer from the second argument into the

first argument and then sets the second to NULL.

(cherry picked from commit 5b7dedc995a6b33a7be33a67290155627a133a7f)

---

 src/internal.h | 12 ++++++++++++

 1 file changed, 12 insertions(+)

diff --git a/src/internal.h b/src/internal.h

index 0dc34c7..d8cc5ad 100644

--- a/src/internal.h

+++ b/src/internal.h

@@ -307,6 +307,18 @@

     } while (0)

 /**

+ * VIR_STEAL_PTR:

+ *

+ * Steals pointer passed as second argument into the first argument. Second

+ * argument must not have side effects.

+ */

+# define VIR_STEAL_PTR(a, b)  \

+    do {                      \

+        (a) = (b);            \

+        (b) = NULL;           \

+    } while (0)

+

+/**

  * virCheckFlags:

  * @supported: an OR'ed set of supported flags

  * @retval: return value in case unsupported flags were passed

-- 

2.10.0