X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=4b3185529bd886a0de8d906d465712a28ebb470c;hb=5135c0fd2284e6365bc9d0c53f060b7e946a412f;hp=cd4a49d19dc6e82f454027bfba76dc2f8eb14bf5;hpb=9f59b2209b3a4bde416bcfa55b10c36b16fa91ae;p=urcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index cd4a49d..4b31855 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -86,9 +86,44 @@
 #define URCU_FORCE_CAST(type, arg)	((type) (arg))
 #endif
 
-#define caa_is_signed_type(type)	(((type) (-1)) < 0)
+#define caa_is_signed_type(type)	((type) -1 < (type) 0)
 
-#define caa_cast_long_keep_sign(v)	\
-	(caa_is_signed_type(__typeof__(v)) ? (long) (v) : (unsigned long) (v))
+/*
+ * Cast to unsigned long, sign-extending if @v is signed.
+ * Note: casting to a larger type or to same type size keeps the sign of
+ * the expression being cast (see C99 6.3.1.3).
+ */
+#define caa_cast_long_keep_sign(v)	((unsigned long) (v))
+
+#if defined (__GNUC__) \
+	&& ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)	\
+		|| __GNUC__ >= 5)
+#define CDS_DEPRECATED(msg)	\
+	__attribute__((deprecated(msg)))
+#else
+#define CDS_DEPRECATED(msg)	\
+	__attribute__((deprecated))
+#endif
+
+#define CAA_ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
+
+/*
+ * Don't allow compiling with buggy compiler.
+ */
+
+#ifdef __GNUC__
+# define URCU_GCC_VERSION	(__GNUC__ * 10000 \
+				+ __GNUC_MINOR__ * 100 \
+				+ __GNUC_PATCHLEVEL__)
+
+/*
+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
+ */
+# ifdef __ARMEL__
+#  if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802
+#   error Your gcc version produces clobbered frame accesses
+#  endif
+# endif
+#endif
 
 #endif /* _URCU_COMPILER_H */