X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=4bced2a9849846a25b8c1fd59a15cd2b03af0060;hb=860d07e812c3001e9d6ce261c8b861dabd3203b3;hp=54904cc4078ed144f8a25bc4778cea1ef7fd1319;hpb=2f8a5ae7266ad4fb9ba77cfa1b4a7104d0465096;p=urcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 54904cc..4bced2a 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -55,10 +55,28 @@
 #define CAA_BITS_PER_LONG	32
 #endif
 
-#define caa_container_of(ptr, type, member)					\
+/*
+ * caa_container_of - Get the address of an object containing a field.
+ *
+ * @ptr: pointer to the field.
+ * @type: type of the object.
+ * @member: name of the field within the object.
+ */
+#define caa_container_of(ptr, type, member)				\
 	({								\
-		const typeof(((type *)NULL)->member) * __ptr = (ptr);	\
+		const typeof(((type *) NULL)->member) * __ptr = (ptr);	\
 		(type *)((char *)__ptr - offsetof(type, member));	\
 	})
 
+#define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
+#define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
+
+/*
+ * __rcu is an annotation that documents RCU pointer accesses that need
+ * to be protected by a read-side critical section. Eventually, a static
+ * checker will be able to use this annotation to detect incorrect RCU
+ * usage.
+ */
+#define __rcu
+
 #endif /* _URCU_COMPILER_H */