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LGPL-ize wfqueue
[urcu.git]
/
urcu
/
compiler.h
diff --git
a/urcu/compiler.h
b/urcu/compiler.h
index 6f6d3e97eb3693ebdd7f8cc509b2acde5c709594..fb8b8293ca132f683f9639c3a2502e934d17c326 100644
(file)
--- a/
urcu/compiler.h
+++ b/
urcu/compiler.h
@@
-6,7
+6,7
@@
*
* Compiler definitions.
*
*
* Compiler definitions.
*
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@
polymtl.ca
>
+ * 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.
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
@@
-18,10
+18,12
@@
* modified is included with the above copyright notice.
*/
* modified is included with the above copyright notice.
*/
+#include <stddef.h> /* for offsetof */
+
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
-#define barrier() asm volatile("" : : : "memory")
;
+#define barrier() asm volatile("" : : : "memory")
/*
* Instruct the compiler to perform only a single access to a variable
/*
* Instruct the compiler to perform only a single access to a variable
@@
-35,16
+37,28
@@
* use is to mediate communication between process-level code and irq/NMI
* handlers, all running on the same CPU.
*/
* use is to mediate communication between process-level code and irq/NMI
* handlers, all running on the same CPU.
*/
-#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&x)
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+
+#ifndef max
+#define max(a,b) ((a)>(b)?(a):(b))
+#endif
-#if
(__GNUC__ == 4)
-#define
__compiler_offsetof(a, b) __builtin_offsetof(a, b
)
+#if
ndef min
+#define
min(a,b) ((a)<(b)?(a):(b)
)
#endif
#endif
-#ifdef __compiler_offsetof
-#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
+#if defined(__SIZEOF_LONG__)
+#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
+#elif defined(_LP64)
+#define BITS_PER_LONG 64
#else
#else
-#define
offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#define
BITS_PER_LONG 32
#endif
#endif
+#define container_of(ptr, type, member) \
+ ({ \
+ const typeof(((type *)NULL)->member) * __ptr = (ptr); \
+ (type *)((char *)__ptr - offsetof(type, member)); \
+ })
+
#endif /* _URCU_COMPILER_H */
#endif /* _URCU_COMPILER_H */
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