# define _FALLTHROUGH __attribute__((fallthrough));
#endif
# define _CONSTRUCTOR(x) constructor(x)
+# define _DEPRECATED(x) deprecated(x)
+# if __has_builtin(assume)
+# define assume(x) __builtin_assume(x)
+# endif
#elif defined(__GNUC__)
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
# define _RET_NONNULL , returns_nonnull
# define _DESTRUCTOR(x) destructor(x)
# define _ALLOC_SIZE(x) alloc_size(x)
#endif
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+# define _DEPRECATED(x) deprecated(x)
+# define assume(x) do { if (!(x)) __builtin_unreachable(); } while (0)
+#endif
+#if __GNUC__ < 5
+# define __has_attribute(x) 0
+#endif
#if __GNUC__ >= 7
# define _FALLTHROUGH __attribute__((fallthrough));
#endif
#endif
+#if __has_attribute(hot)
+# define _OPTIMIZE_HOT __attribute__((hot))
+#else
+# define _OPTIMIZE_HOT
+#endif
+#if __has_attribute(optimize)
+# define _OPTIMIZE_O3 __attribute__((optimize("3")))
+#else
+# define _OPTIMIZE_O3
+#endif
+#define OPTIMIZE _OPTIMIZE_O3 _OPTIMIZE_HOT
+
+#if !defined(__GNUC__)
+#error module code needs GCC visibility extensions
+#elif __GNUC__ < 4
+#error module code needs GCC visibility extensions
+#else
+# define DSO_PUBLIC __attribute__ ((visibility ("default")))
+# define DSO_SELF __attribute__ ((visibility ("protected")))
+# define DSO_LOCAL __attribute__ ((visibility ("hidden")))
+#endif
+
#ifdef __sun
/* Solaris doesn't do constructor priorities due to linker restrictions */
#undef _CONSTRUCTOR
#ifndef _FALLTHROUGH
#define _FALLTHROUGH
#endif
+#ifndef _DEPRECATED
+#define _DEPRECATED(x) deprecated
+#endif
+#ifndef assume
+#define assume(x)
+#endif
+
+/* pure = function does not modify memory & return value is the same if
+ * memory hasn't changed (=> allows compiler to optimize)
+ *
+ * Mostly autodetected by the compiler if function body is available (i.e.
+ * static inline functions in headers). Since that implies it should only be
+ * used in headers for non-inline functions, the "extern" is included here.
+ */
+#define ext_pure extern __attribute__((pure))
+
+/* for helper functions defined inside macros */
+#define macro_inline static inline __attribute__((unused))
+#define macro_pure static inline __attribute__((unused, pure))
+
+
+/* variadic macros, use like:
+ * #define V_0() ...
+ * #define V_1(x) ...
+ * #define V(...) MACRO_VARIANT(V, ##__VA_ARGS__)(__VA_ARGS__)
+ */
+#define _MACRO_VARIANT(A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10, N, ...) N
+
+#define _CONCAT2(a, b) a ## b
+#define _CONCAT(a, b) _CONCAT2(a,b)
+
+#define MACRO_VARIANT(NAME, ...) \
+ _CONCAT(NAME, _MACRO_VARIANT(0, ##__VA_ARGS__, \
+ _10, _9, _8, _7, _6, _5, _4, _3, _2, _1, _0))
+
+#define NAMECTR(name) _CONCAT(name, __COUNTER__)
+
+/* per-arg repeat macros, use like:
+ * #define PERARG(n) ...n...
+ * #define FOO(...) MACRO_REPEAT(PERARG, ##__VA_ARGS__)
+ */
+
+#define _MACRO_REPEAT_0(NAME)
+#define _MACRO_REPEAT_1(NAME, A1) \
+ NAME(A1)
+#define _MACRO_REPEAT_2(NAME, A1, A2) \
+ NAME(A1) NAME(A2)
+#define _MACRO_REPEAT_3(NAME, A1, A2, A3) \
+ NAME(A1) NAME(A2) NAME(A3)
+#define _MACRO_REPEAT_4(NAME, A1, A2, A3, A4) \
+ NAME(A1) NAME(A2) NAME(A3) NAME(A4)
+#define _MACRO_REPEAT_5(NAME, A1, A2, A3, A4, A5) \
+ NAME(A1) NAME(A2) NAME(A3) NAME(A4) NAME(A5)
+#define _MACRO_REPEAT_6(NAME, A1, A2, A3, A4, A5, A6) \
+ NAME(A1) NAME(A2) NAME(A3) NAME(A4) NAME(A5) NAME(A6)
+#define _MACRO_REPEAT_7(NAME, A1, A2, A3, A4, A5, A6, A7) \
+ NAME(A1) NAME(A2) NAME(A3) NAME(A4) NAME(A5) NAME(A6) NAME(A7)
+#define _MACRO_REPEAT_8(NAME, A1, A2, A3, A4, A5, A6, A7, A8) \
+ NAME(A1) NAME(A2) NAME(A3) NAME(A4) NAME(A5) NAME(A6) NAME(A7) NAME(A8)
+
+#define MACRO_REPEAT(NAME, ...) \
+ MACRO_VARIANT(_MACRO_REPEAT, ##__VA_ARGS__)(NAME, ##__VA_ARGS__)
/*
* for warnings on macros, put in the macro content like this:
#define CPP_NOTICE(text)
#endif
+/* MAX / MIN are not commonly defined, but useful */
+/* note: glibc sys/param.h has #define MIN(a,b) (((a)<(b))?(a):(b)) */
+#ifdef MAX
+#undef MAX
+#endif
+#define MAX(a, b) \
+ ({ \
+ typeof(a) _max_a = (a); \
+ typeof(b) _max_b = (b); \
+ _max_a > _max_b ? _max_a : _max_b; \
+ })
+#ifdef MIN
+#undef MIN
+#endif
+#define MIN(a, b) \
+ ({ \
+ typeof(a) _min_a = (a); \
+ typeof(b) _min_b = (b); \
+ _min_a < _min_b ? _min_a : _min_b; \
+ })
+
+#define numcmp(a, b) \
+ ({ \
+ typeof(a) _cmp_a = (a); \
+ typeof(b) _cmp_b = (b); \
+ (_cmp_a < _cmp_b) ? -1 : ((_cmp_a > _cmp_b) ? 1 : 0); \
+ })
+
+#ifndef offsetof
+#ifdef __compiler_offsetof
+#define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE,MEMBER)
+#else
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+#endif
+
+#ifdef container_of
+#undef container_of
+#endif
+
+#if !(defined(__cplusplus) || defined(test__cplusplus))
+/* this variant of container_of() retains 'const' on pointers without needing
+ * to be told to do so. The following will all work without warning:
+ *
+ * struct member *p;
+ * const struct member *cp;
+ *
+ * const struct cont *x = container_of(cp, struct cont, member);
+ * const struct cont *x = container_of(cp, const struct cont, member);
+ * const struct cont *x = container_of(p, struct cont, member);
+ * const struct cont *x = container_of(p, const struct cont, member);
+ * struct cont *x = container_of(p, struct cont, member);
+ *
+ * but the following will generate warnings about stripping const:
+ *
+ * struct cont *x = container_of(cp, struct cont, member);
+ * struct cont *x = container_of(cp, const struct cont, member);
+ * struct cont *x = container_of(p, const struct cont, member);
+ */
+#define container_of(ptr, type, member) \
+ (__builtin_choose_expr( \
+ __builtin_types_compatible_p(typeof(&((type *)0)->member), \
+ typeof(ptr)) \
+ || __builtin_types_compatible_p(void *, typeof(ptr)), \
+ ({ \
+ typeof(((type *)0)->member) *__mptr = (void *)(ptr); \
+ (type *)((char *)__mptr - offsetof(type, member)); \
+ }), \
+ ({ \
+ typeof(((const type *)0)->member) *__mptr = (ptr); \
+ (const type *)((const char *)__mptr - \
+ offsetof(type, member)); \
+ }) \
+ ))
+#else
+/* current C++ compilers don't have the builtins used above; so this version
+ * of the macro doesn't do the const check. */
+#define container_of(ptr, type, member) \
+ ({ \
+ const typeof(((type *)0)->member) *__mptr = (ptr); \
+ (type *)((char *)__mptr - offsetof(type, member)); \
+ })
+#endif
+
+#define container_of_null(ptr, type, member) \
+ ({ \
+ typeof(ptr) _tmp = (ptr); \
+ _tmp ? container_of(_tmp, type, member) : NULL; \
+ })
+
+#define array_size(ar) (sizeof(ar) / sizeof(ar[0]))
+
+/* sigh. this is so ugly, it overflows and wraps to being nice again.
+ *
+ * printfrr() supports "%Ld" for <int64_t>, whatever that is typedef'd to.
+ * However, gcc & clang think that "%Ld" is <long long>, which doesn't quite
+ * match up since int64_t is <long> on a lot of 64-bit systems.
+ *
+ * If we have _FRR_ATTRIBUTE_PRINTFRR, we loaded a compiler plugin that
+ * replaces the whole format checking bits with a custom version that
+ * understands "%Ld" (along with "%pI4" and co.), so we don't need to do
+ * anything.
+ *
+ * If we don't have that attribute... we still want -Wformat to work. So,
+ * this is the "f*ck it" approach and we just redefine int64_t to always be
+ * <long long>. This should work until such a time that <long long> is
+ * something else (e.g. 128-bit integer)... let's just guard against that
+ * with the _Static_assert below and work with the world we have right now,
+ * where <long long> is always 64-bit.
+ */
+
+/* these need to be included before any of the following, so we can
+ * "overwrite" things.
+ */
+#include <stdint.h>
+#include <inttypes.h>
+
+#ifdef _FRR_ATTRIBUTE_PRINTFRR
+#define PRINTFRR(a, b) __attribute__((printfrr(a, b)))
+
+#else /* !_FRR_ATTRIBUTE_PRINTFRR */
+#define PRINTFRR(a, b) __attribute__((format(printf, a, b)))
+
+/* these should be typedefs, but might also be #define */
+#ifdef uint64_t
+#undef uint64_t
+#endif
+#ifdef int64_t
+#undef int64_t
+#endif
+
+/* can't overwrite the typedef, but we can replace int64_t with _int64_t */
+typedef unsigned long long _uint64_t;
+#define uint64_t _uint64_t
+typedef signed long long _int64_t;
+#define int64_t _int64_t
+
+/* if this breaks, 128-bit machines may have entered reality (or <long long>
+ * is something weird)
+ */
+#if __STDC_VERSION__ >= 201112L
+_Static_assert(sizeof(_uint64_t) == 8 && sizeof(_int64_t) == 8,
+ "nobody expects the spanish intquisition");
+#endif
+
+/* since we redefined int64_t, we also need to redefine PRI*64 */
+#undef PRIu64
+#undef PRId64
+#undef PRIx64
+#define PRIu64 "llu"
+#define PRId64 "lld"
+#define PRIx64 "llx"
+#endif /* !_FRR_ATTRIBUTE_PRINTFRR */
+
#ifdef __cplusplus
}
#endif
projects / mirror_frr.git / blobdiff