Add container_of function.

Signed-off-by: Chris Michael <cp.michael@samsung.com>
2013-05-03 10:49:30 +01:00 · 2013-05-03 10:49:30 +01:00 · 4290891c73
parent b4fbebcd09
commit 4290891c73
1 changed files with 6 additions and 0 deletions
--- a/src/bin/e_wayland/e_comp.h
+++ b/src/bin/e_wayland/e_comp.h
@ -6,6 +6,12 @@ typedef struct _E_Compositor E_Compositor;
 # ifndef E_COMP_H
 #  define E_COMP_H

+#  define container_of(ptr, type, mbr) \
+   ({ \
+      const __typeof__(((type *)0)->mbr) *__mptr = (ptr); \
+      (type *)((char *)__mptr - offsetof(type, mbr)); \
+   })
+
 struct _E_Compositor
 {
   struct