From 03afaae12811632cf975586728826af14a634ad1 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Fri, 22 Jan 2016 20:12:40 +0100
Subject: erts: Beautify some code with container_of macro

---
 erts/emulator/beam/sys.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'erts/emulator/beam/sys.h')

diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 748fba15c7..dda3ba565c 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -92,6 +92,9 @@
 #define ErtsInArea(ptr,start,nbytes) \
     ((UWord)((char*)(ptr) - (char*)(start)) < (nbytes))
 
+#define ErtsContainerStruct(ptr, type, member) \
+  (type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member))
+
 #if defined (__WIN32__)
 #  include "erl_win_sys.h"
 #else
-- 
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