X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=ce19c74764de7c82c5c8dbb06e2ddd214027c5f8;hb=56b14eae63673af90dd92e9495ee1d6905591f1f;hp=aab2c5cdd7bff1c590896f0add675ba3435fcc3a;hpb=f540a0fdac1fb71bba34c6aafff55f0e2fce7877;p=urcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index aab2c5c..ce19c74 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -37,7 +37,7 @@
  * 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 ACCESS_ONCE(x)	(*(volatile typeof(x) *)&(x))
 
 #ifndef max
 #define max(a,b) ((a)>(b)?(a):(b))
@@ -47,4 +47,12 @@
 #define min(a,b) ((a)<(b)?(a):(b))
 #endif
 
+#if defined(__SIZEOF_LONG__)
+#define BITS_PER_LONG	(__SIZEOF_LONG__ * 8)
+#elif defined(_LP64)
+#define BITS_PER_LONG	64
+#else
+#define BITS_PER_LONG	32
+#endif
+
 #endif /* _URCU_COMPILER_H */