From 07e34b5dabbe1609ff848b2137ccbbff33619144 Mon Sep 17 00:00:00 2001
From: arighi <arighi@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Wed, 17 Mar 2010 11:53:11 +0000
Subject: [PATCH] Add alignof() macro.
This macro returns the alignment in memory of a generic data type.
git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3224 38d2e660-2303-0410-9eaa-f027e97ec537
---
bertos/cfg/compiler.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/bertos/cfg/compiler.h b/bertos/cfg/compiler.h
index 87cdd942..5cacf1dc 100644
--- a/bertos/cfg/compiler.h
+++ b/bertos/cfg/compiler.h
@@ -490,6 +490,16 @@ typedef unsigned char page_t; /**< Type for banked memory pages. */
*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
#endif
+#ifndef alignof
+ /**
+ * Return the alignment in memory of a generic data type.
+ *
+ * \note We need to worry about alignment when allocating memory that
+ * will be used later by unknown objects (e.g., malloc()) or, more
+ * generally, whenever creating generic container types.
+ */
+ #define alignof(type) offsetof(struct { char c; type member; }, member)
+#endif
/**
* Cast a member of a structure out to the containing structure.
--
2.34.1