X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=4bced2a9849846a25b8c1fd59a15cd2b03af0060;hb=f0c29ed7ca7129056f5c757a9fbcbbfa8c14da44;hp=fcab5ea591e83e21efa471df038b2500efde3ad8;hpb=6982d6d71aeed16d2d929bd0ed221e8f444b706e;p=urcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index fcab5ea..4bced2a 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -23,36 +23,60 @@
 #define likely(x)	__builtin_expect(!!(x), 1)
 #define unlikely(x)	__builtin_expect(!!(x), 0)
 
-#define	barrier()	asm volatile("" : : : "memory")
+#define	cmm_barrier()	asm volatile("" : : : "memory")
 
 /*
  * Instruct the compiler to perform only a single access to a variable
  * (prohibits merging and refetching). The compiler is also forbidden to reorder
- * successive instances of ACCESS_ONCE(), but only when the compiler is aware of
+ * successive instances of CMM_ACCESS_ONCE(), but only when the compiler is aware of
  * particular ordering. Compiler ordering can be ensured, for example, by
- * putting two ACCESS_ONCE() in separate C statements.
+ * putting two CMM_ACCESS_ONCE() in separate C statements.
  *
  * This macro does absolutely -nothing- to prevent the CPU from reordering,
  * merging, or refetching absolutely anything at any time.  Its main intended
  * use is to mediate communication between process-level code and irq/NMI
  * handlers, all running on the same CPU.
  */
-#define ACCESS_ONCE(x)	(*(volatile typeof(x) *)&(x))
+#define CMM_ACCESS_ONCE(x)	(*(volatile typeof(x) *)&(x))
 
-#ifndef max
-#define max(a,b) ((a)>(b)?(a):(b))
+#ifndef caa_max
+#define caa_max(a,b) ((a)>(b)?(a):(b))
 #endif
 
-#ifndef min
-#define min(a,b) ((a)<(b)?(a):(b))
+#ifndef caa_min
+#define caa_min(a,b) ((a)<(b)?(a):(b))
 #endif
 
 #if defined(__SIZEOF_LONG__)
-#define BITS_PER_LONG	(__SIZEOF_LONG__ * 8)
+#define CAA_BITS_PER_LONG	(__SIZEOF_LONG__ * 8)
 #elif defined(_LP64)
-#define BITS_PER_LONG	64
+#define CAA_BITS_PER_LONG	64
 #else
-#define BITS_PER_LONG	32
+#define CAA_BITS_PER_LONG	32
 #endif
 
+/*
+ * 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);	\
+		(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 */