Fix uatomic sign cast

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 08bd9e9f44fa004a744f98d1734a5131bc670428..fc2425cd5ff2f4c0aaf8f83d4c820d36ec2a9424 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -86,4 +86,9 @@
 #define URCU_FORCE_CAST(type, arg)     ((type) (arg))
 #endif
 
+#define caa_is_signed_type(type)       (((type) (-1)) < 0)
+
+#define caa_cast_long_keep_sign(v)     \
+       (caa_is_signed_type(__typeof__(v)) ? (long) (v) : (unsigned long) (v))
+
 #endif /* _URCU_COMPILER_H */