* @file
*
* Generic, commonly-used macro and inline function definitions
- * for Intel DPDK.
+ * for DPDK.
*/
#ifdef __cplusplus
#define asm __asm__
#endif
+/** C extension macro for environments lacking C11 features. */
+#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
+#define RTE_STD_C11 __extension__
+#else
+#define RTE_STD_C11
+#endif
+
+#ifdef RTE_ARCH_STRICT_ALIGN
+typedef uint64_t unaligned_uint64_t __attribute__ ((aligned(1)));
+typedef uint32_t unaligned_uint32_t __attribute__ ((aligned(1)));
+typedef uint16_t unaligned_uint16_t __attribute__ ((aligned(1)));
+#else
+typedef uint64_t unaligned_uint64_t;
+typedef uint32_t unaligned_uint32_t;
+typedef uint16_t unaligned_uint16_t;
+#endif
+
+/**
+ * Force alignment
+ */
+#define __rte_aligned(a) __attribute__((__aligned__(a)))
+
+/**
+ * Force a structure to be packed
+ */
+#define __rte_packed __attribute__((__packed__))
+
+/******* Macro to mark functions and fields scheduled for removal *****/
+#define __rte_deprecated __attribute__((__deprecated__))
+
/*********** Macros to eliminate unused variable warnings ********/
/**
/**
* Macro to return the minimum of two numbers
*/
-#define RTE_MIN(a, b) ({ \
+#define RTE_MIN(a, b) \
+ __extension__ ({ \
typeof (a) _a = (a); \
typeof (b) _b = (b); \
_a < _b ? _a : _b; \
/**
* Macro to return the maximum of two numbers
*/
-#define RTE_MAX(a, b) ({ \
+#define RTE_MAX(a, b) \
+ __extension__ ({ \
typeof (a) _a = (a); \
typeof (b) _b = (b); \
_a > _b ? _a : _b; \
static inline uint32_t
rte_bsf32(uint32_t v)
{
- return (__builtin_ctz(v));
+ return __builtin_ctz(v);
}
#ifndef offsetof
#define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
#endif
+/**
+ * Return pointer to the wrapping struct instance.
+ *
+ * Example:
+ *
+ * struct wrapper {
+ * ...
+ * struct child c;
+ * ...
+ * };
+ *
+ * struct child *x = obtain(...);
+ * struct wrapper *w = container_of(x, struct wrapper, c);
+ */
+#ifndef container_of
+#define container_of(ptr, type, member) __extension__ ({ \
+ const typeof(((type *)0)->member) *_ptr = (ptr); \
+ (type *)(((uintptr_t)_ptr) - offsetof(type, member)); \
+ })
+#endif
+
#define _RTE_STR(x) #x
/** Take a macro value and get a string version of it */
#define RTE_STR(x) _RTE_STR(x)
+/**
+ * ISO C helpers to modify format strings using variadic macros.
+ * This is a replacement for the ", ## __VA_ARGS__" GNU extension.
+ * An empty %s argument is appended to avoid a dangling comma.
+ */
+#define RTE_FMT(fmt, ...) fmt "%.0s", __VA_ARGS__ ""
+#define RTE_FMT_HEAD(fmt, ...) fmt
+#define RTE_FMT_TAIL(fmt, ...) __VA_ARGS__
+
/** Mask value of type "tp" for the first "ln" bit set. */
#define RTE_LEN2MASK(ln, tp) \
((tp)((uint64_t)-1 >> (sizeof(uint64_t) * CHAR_BIT - (ln))))