diff options
Diffstat (limited to 'include/nasmlib.h')
| -rw-r--r-- | include/nasmlib.h | 62 |
1 files changed, 45 insertions, 17 deletions
diff --git a/include/nasmlib.h b/include/nasmlib.h index 66fbebcf..14f4dc7f 100644 --- a/include/nasmlib.h +++ b/include/nasmlib.h @@ -114,33 +114,61 @@ void nasm_read(void *, size_t, FILE *); void nasm_write(const void *, size_t, FILE *); /* - * NASM assert failure - */ -fatal_func nasm_assert_failed(const char *, int, const char *); -#define nasm_assert(x) \ - do { \ - if (unlikely(!(x))) \ - nasm_assert_failed(__FILE__,__LINE__,#x); \ - } while (0) - -/* * NASM failure at build time if the argument is false */ #ifdef static_assert -# define nasm_static_assert(x) static_assert(x, #x) +# define nasm_static_assert(x) static_assert((x), #x) #elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__) -# define nasm_static_assert(x) \ - if (!(x)) { \ - extern void __attribute__((error("assertion " #x " failed"))) \ - _nasm_static_fail(void); \ - _nasm_static_fail(); \ - } +# define nasm_static_assert(x) \ + do { \ + if (!(x)) { \ + extern void __attribute__((error("assertion " #x " failed"))) \ + _nasm_static_fail(void); \ + _nasm_static_fail(); \ + } \ + } while (0) #else /* See http://www.drdobbs.com/compile-time-assertions/184401873 */ # define nasm_static_assert(x) \ do { enum { _static_assert_failed = 1/(!!(x)) }; } while (0) #endif +/* + * conditional static assert, if we know it is possible to determine + * the assert value at compile time. Since if_constant triggers + * pedantic warnings on gcc, turn them off explicitly around this code. + */ +#ifdef static_assert +# define nasm_try_static_assert(x) \ + do { \ + not_pedantic_start \ + static_assert(if_constant(x, true), #x); \ + not_pedantic_end \ + } while (0) +#elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__) +# define nasm_try_static_assert(x) \ + do { \ + if (!if_constant(x, true)) { \ + extern void __attribute__((error("assertion " #x " failed"))) \ + _nasm_static_fail(void); \ + _nasm_static_fail(); \ + } \ + } while (0) +#else +# define nasm_try_static_assert(x) ((void)0) +#endif + +/* + * NASM assert failure + */ +fatal_func nasm_assert_failed(const char *, int, const char *); +#define nasm_assert(x) \ + do { \ + nasm_try_static_assert(x); \ + if (unlikely(!(x))) \ + nasm_assert_failed(__FILE__,__LINE__,#x); \ + } while (0) + /* Utility function to generate a string for an invalid enum */ const char *invalid_enum_str(int); |