* @member: name of the field within the object.
*/
#define caa_container_of(ptr, type, member) \
+ __extension__ \
({ \
const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \
(type *)((char *)__ptr - offsetof(type, member)); \
#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_MAJOR__ == 4) && (__GNUC_MINOR__ >= 5) \
- || __GNUC_MAJOR__ >= 5)
+ && ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5) \
+ || __GNUC__ >= 5)
#define CDS_DEPRECATED(msg) \
__attribute__((deprecated(msg)))
#else
__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 */