Fix c99 compatibility: use __typeof__ instead of typeof in public headers

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 08bd9e9f44fa004a744f98d1734a5131bc670428..974885a73f36c08e322bb6606bb3cd0e8e964ddd 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -38,7 +38,7 @@
  * use is to mediate communication between process-level code and irq/NMI
  * handlers, all running on the same CPU.
  */
-#define CMM_ACCESS_ONCE(x)     (*(volatile typeof(x) *)&(x))
+#define CMM_ACCESS_ONCE(x)     (*(volatile __typeof__(x) *)&(x))
 
 #ifndef caa_max
 #define caa_max(a,b) ((a)>(b)?(a):(b))
@@ -65,7 +65,7 @@
  */
 #define caa_container_of(ptr, type, member)                            \
        ({                                                              \
-               const typeof(((type *) NULL)->member) * __ptr = (ptr);  \
+               const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \
                (type *)((char *)__ptr - offsetof(type, member));       \
        })
 
@@ -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 */