centralize definition of BITS_PER_LONG

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index aab2c5cdd7bff1c590896f0add675ba3435fcc3a..5b7bb305b2de83b1828171f506d7241d3c692d03 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -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 */