*
* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
*
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*/
#include <stddef.h> /* for offsetof */
#define caa_likely(x) __builtin_expect(!!(x), 1)
#define caa_unlikely(x) __builtin_expect(!!(x), 0)
-#define cmm_barrier() asm volatile("" : : : "memory")
+#define cmm_barrier() __asm__ __volatile__ ("" : : : "memory")
/*
* Instruct the compiler to perform only a single access to a variable
* 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))
* @member: name of the field within the object.
*/
#define caa_container_of(ptr, type, member) \
+ __extension__ \
({ \
- const typeof(((type *) NULL)->member) * __ptr = (ptr); \
+ const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \
(type *)((char *)__ptr - offsetof(type, member)); \
})
#define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
-#define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
+#define CAA_BUILD_BUG_ON(cond) ((void)CAA_BUILD_BUG_ON_ZERO(cond))
/*
* __rcu is an annotation that documents RCU pointer accesses that need
#define URCU_FORCE_CAST(type, arg) ((type) (arg))
#endif
+#define caa_is_signed_type(type) ((type) -1 < (type) 0)
+
+/*
+ * 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 */