// some nice optional GNUC features
#if __GNUC__ >= 3
- #define __must_check __attribute__ ((warn_unused_result))
- #define __deprecated __attribute__ ((deprecated))
- /* likely() and unlikely() can be used to mark boolean expressions
- as (not) likely true which will help the compiler to optimise */
- #define likely(x) __builtin_expect (!!(x), 1)
- #define unlikely(x) __builtin_expect (!!(x), 0)
+ #define __must_check __attribute__ ((warn_unused_result))
+ #define __deprecated __attribute__ ((deprecated))
+ #define __attrib_const __attribute__ ((__const__))
+ /* likely() and unlikely() can be used to mark boolean expressions
+ as (not) likely true which will help the compiler to optimise */
+ #define likely(x) __builtin_expect (!!(x), 1)
+ #define unlikely(x) __builtin_expect (!!(x), 0)
#else
- #define __must_check /* no warn_unused_result */
- #define __deprecated /* no deprecated */
- #define likely(x) (x)
- #define unlikely(x) (x)
+ #define __must_check /* no warn_unused_result */
+ #define __deprecated /* no deprecated */
+ #define __attrib_const /* no const attribute */
+ #define likely(x) (x)
+ #define unlikely(x) (x)
#endif
// cold functions are unlikely() to be called
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
- #define __cold __attribute__ ((__cold__))
+ #define __cold __attribute__ ((__cold__))
+ #define __hot __attribute__ ((__hot__))
#else
- #define __cold /* no cold marker */
+ #define __cold /* no cold marker */
+ #define __hot /* no hot marker */
+#endif
+
+#ifdef __GNUG__
+// Methods have a hidden this parameter that is visible to this attribute
+ #define __like_printf(n) __attribute__((format(printf, n, n + 1)))
+#else
+ #define __like_printf(n) /* no like-printf */
#endif
#endif