X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=ce19c74764de7c82c5c8dbb06e2ddd214027c5f8;hb=a2c502feb1f1510eef3234168bc16a98404694bf;hp=975e1eadc1e9cfddd8c21d34f129921808ef7863;hpb=fdee2e6dc73cc504ba24be89da539c68742e508e;p=urcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 975e1ea..ce19c74 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -23,7 +23,7 @@
 #define likely(x)	__builtin_expect(!!(x), 1)
 #define unlikely(x)	__builtin_expect(!!(x), 0)
 
-#define	barrier()	asm volatile("" : : : "memory");
+#define	barrier()	asm volatile("" : : : "memory")
 
 /*
  * Instruct the compiler to perform only a single access to a variable
@@ -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 */