diff options
Diffstat (limited to 'lib/compiler.h')
| -rw-r--r-- | lib/compiler.h | 64 |
1 files changed, 52 insertions, 12 deletions
diff --git a/lib/compiler.h b/lib/compiler.h index 70ef8e9bc8..bf443906eb 100644 --- a/lib/compiler.h +++ b/lib/compiler.h @@ -21,6 +21,21 @@ extern "C" { #endif +#ifdef __cplusplus +# if __cplusplus < 201103L +# error FRRouting headers must be compiled in C++11 mode or newer +# endif +/* C++ defines static_assert(), but not _Static_assert(). C defines + * _Static_assert() and has static_assert() in <assert.h>. However, we mess + * with assert() in zassert.h so let's not include <assert.h> here. + */ +# define _Static_assert static_assert +#else +# if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L +# error FRRouting must be compiled with min. -std=gnu11 (GNU ISO C11 dialect) +# endif +#endif + /* function attributes, use like * void prototype(void) __attribute__((_CONSTRUCTOR(100))); */ @@ -108,19 +123,13 @@ extern "C" { #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)) +/* if the macro ends with a function definition */ +#define MACRO_REQUIRE_SEMICOLON() \ + _Static_assert(1, "please add a semicolon after this macro") /* variadic macros, use like: * #define V_0() ... @@ -164,6 +173,29 @@ extern "C" { #define MACRO_REPEAT(NAME, ...) \ MACRO_VARIANT(_MACRO_REPEAT, ##__VA_ARGS__)(NAME, ##__VA_ARGS__) +/* per-arglist repeat macro, use like this: + * #define foo(...) MAP_LISTS(F, ##__VA_ARGS__) + * where F is a n-ary function where n is the number of args in each arglist. + * e.g.: MAP_LISTS(f, (a, b), (c, d)) + * expands to: f(a, b); f(c, d) + */ + +#define ESC(...) __VA_ARGS__ +#define MAP_LISTS(M, ...) \ + _CONCAT(_MAP_LISTS_, PP_NARG(__VA_ARGS__))(M, ##__VA_ARGS__) +#define _MAP_LISTS_0(M) +#define _MAP_LISTS_1(M, _1) ESC(M _1) +#define _MAP_LISTS_2(M, _1, _2) ESC(M _1; M _2) +#define _MAP_LISTS_3(M, _1, _2, _3) ESC(M _1; M _2; M _3) +#define _MAP_LISTS_4(M, _1, _2, _3, _4) ESC(M _1; M _2; M _3; M _4) +#define _MAP_LISTS_5(M, _1, _2, _3, _4, _5) ESC(M _1; M _2; M _3; M _4; M _5) +#define _MAP_LISTS_6(M, _1, _2, _3, _4, _5, _6) \ + ESC(M _1; M _2; M _3; M _4; M _5; M _6) +#define _MAP_LISTS_7(M, _1, _2, _3, _4, _5, _6, _7) \ + ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7) +#define _MAP_LISTS_8(M, _1, _2, _3, _4, _5, _6, _7, _8) \ + ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7; M _8) + /* * for warnings on macros, put in the macro content like this: * #define MACRO BLA CPP_WARN("MACRO has been deprecated") @@ -298,7 +330,7 @@ extern "C" { 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, \ 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 -#define PP_NARG_(...) PP_ARG_N(__VA_ARGS__) +#define PP_NARG_(...) PP_ARG_N(__VA_ARGS__) #define PP_NARG(...) PP_NARG_(_, ##__VA_ARGS__, PP_RSEQ_N()) @@ -338,8 +370,16 @@ extern "C" { #define PRIx64 "Lx" #else /* !_FRR_ATTRIBUTE_PRINTFRR */ +#ifdef __NetBSD__ +#define PRINTFRR(a, b) __attribute__((format(gnu_syslog, a, b))) +#else #define PRINTFRR(a, b) __attribute__((format(printf, a, b))) +#endif +/* frr-format plugin is C-only for now, so no point in doing these shenanigans + * for C++... (also they can break some C++ stuff...) + */ +#ifndef __cplusplus /* these should be typedefs, but might also be #define */ #ifdef uint64_t #undef uint64_t @@ -357,10 +397,8 @@ typedef signed long long _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 @@ -369,6 +407,8 @@ _Static_assert(sizeof(_uint64_t) == 8 && sizeof(_int64_t) == 8, #define PRIu64 "llu" #define PRId64 "lld" #define PRIx64 "llx" + +#endif /* !__cplusplus */ #endif /* !_FRR_ATTRIBUTE_PRINTFRR */ #ifdef __cplusplus |