X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=compiler.h;h=99972f30e2ba89726f663c78261f4e9203b6d026;hb=9b35d5dcf52a88861328f442ee0ef6812ec9b35b;hp=142b9a60fa98c011096a1fba025d962e63b07520;hpb=329045f0eb60fcfb432154979ec458b04df40630;p=urcu.git

diff --git a/compiler.h b/compiler.h
index 142b9a6..99972f3 100644
--- a/compiler.h
+++ b/compiler.h
@@ -37,4 +37,14 @@
  */
 #define ACCESS_ONCE(x)	(*(volatile typeof(x) *)&x)
 
+#if (__GNUC__ == 4)
+#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
+#endif
+
+#ifdef __compiler_offsetof
+#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
+#else
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
 #endif /* _COMPILER_H */