* 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))
#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 */