X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=macros.h;h=6639d99b93705ef7f88a0a0a5e31b0f405b83c32;hb=edce74d23db44bb7857440e8144484dc73c22ee9;hp=90f6b7dbd8e6e7bd5069770e02c0a64637d7b3e2;hpb=79fab4476f08c6aa8696b52a788a4c724d57b170;p=bertos.git diff --git a/macros.h b/macros.h index 90f6b7db..6639d99b 100755 --- a/macros.h +++ b/macros.h @@ -5,54 +5,126 @@ * This file is part of DevLib - See devlib/README for information. * --> * - * \version $Id$ + * \brief Common and handy function macros * + * \version $Id$ * \author Bernardo Innocenti * \author Giovanni Bajo - * - * \brief Common and handy function macros */ -/* - * $Log$ - * Revision 1.2 2004/08/24 13:32:14 bernie - * PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h; - * offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere; - * Trim CVS log; - * Rename header guards; - * Don't include arch_config.h in compiler.h as it's not needed there. - * - * Revision 1.1 2004/08/14 19:37:57 rasky - * Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc. - * - * Revision 1.4 2004/08/14 18:36:50 rasky - * Doxygen fix e un livello di parentesi aggiuntivi per la macro - * - * Revision 1.3 2004/08/12 20:01:32 rasky - * Aggiunte macro BIT_CHANGE e BIT_CHANGE_BV - * - * Revision 1.2 2004/08/10 21:36:14 rasky - * Aggiunto include macros.h dove serve - * Aggiunta dipendenza da compiler.h in macros.h - * - * Revision 1.1 2004/08/10 21:30:00 rasky - * Estratte le funzioni macro in macros.h - * - */ +/*#* + *#* $Log$ + *#* Revision 1.9 2004/12/08 08:51:34 bernie + *#* Add type-generic macros for C++. + *#* + *#* Revision 1.8 2004/10/19 07:14:20 bernie + *#* Add macros to test for specific compiler features. + *#* + *#* Revision 1.7 2004/09/20 03:30:45 bernie + *#* C++ also has variadic macros. + *#* + *#* Revision 1.6 2004/09/14 21:02:04 bernie + *#* SWAP(), MINMAX(): New macros. + *#* + *#* Revision 1.5 2004/08/29 21:57:58 bernie + *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h; + *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef. + *#* + *#* Revision 1.3 2004/08/24 14:13:48 bernie + *#* Restore a few macros that were lost in the way. + *#* + *#* Revision 1.2 2004/08/24 13:32:14 bernie + *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h; + *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere; + *#* Trim CVS log; + *#* Rename header guards; + *#* Don't include arch_config.h in compiler.h as it's not needed there. + *#* + *#* Revision 1.1 2004/08/14 19:37:57 rasky + *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc. + *#* + *#* Revision 1.4 2004/08/14 18:36:50 rasky + *#* Doxygen fix e un livello di parentesi aggiuntivi per la macro + *#* + *#* Revision 1.3 2004/08/12 20:01:32 rasky + *#* Aggiunte macro BIT_CHANGE e BIT_CHANGE_BV + *#* + *#* Revision 1.2 2004/08/10 21:36:14 rasky + *#* Aggiunto include macros.h dove serve + *#* Aggiunta dipendenza da compiler.h in macros.h + *#* + *#* Revision 1.1 2004/08/10 21:30:00 rasky + *#* Estratte le funzioni macro in macros.h + *#* + *#*/ #ifndef MACROS_H #define MACROS_H #include -/* Simple macros */ -#define ABS(a) (((a) < 0) ? -(a) : (a)) -#define MIN(a,b) (((a) < (b)) ? (a) : (b)) -#define MAX(a,b) (((a) > (b)) ? (a) : (b)) +/* avr-gcc does not seem to support libstdc++ */ +#if defined(__cplusplus) && !CPU_AVR + /* Type-generic macros implemented with template functions. */ + #include + + template inline T ABS(T n) { return n >= 0 ? n : -n; } + #define MIN(a,b) std::min(a, b) + #define MAX(a,b) std::max(a, b) + #define SWAP(a,b) std::swap(a, b) +#elif (COMPILER_STATEMENT_EXPRESSIONS && COMPILER_TYPEOF) + /* Type-generic macros implemented with statement expressions. */ + #define ABS(n) ({ \ + __typeof__(n) _n = (n); \ + (_n < 0) ? -_n : _n; \ + }) + #define MIN(a,b) ({ \ + __typeof__(a) _a = (a); \ + __typeof__(b) _b = (b); \ + (void)(&_a == &_b); /* ensure same type */ \ + (_a < _b) ? _a : _b; \ + }) + #define MAX(a,b) ({ \ + __typeof__(a) _a = (a); \ + __typeof__(b) _b = (b); \ + (void)(&_a == &_b); /* ensure same type */ \ + (_a > _b) ? _a : _b; \ + }) +#else /* !(COMPILER_STATEMENT_EXPRESSIONS && COMPILER_TYPEOF) */ + /* Buggy macros for inferior compilers. */ + #define ABS(a) (((a) < 0) ? -(a) : (a)) + #define MIN(a,b) (((a) < (b)) ? (a) : (b)) + #define MAX(a,b) (((a) > (b)) ? (a) : (b)) +#endif /* !(COMPILER_STATEMENT_EXPRESSIONS && COMPILER_TYPEOF) */ + +/*! Bound \a x between \a min and \a max. */ +#define MINMAX(min,x,max) (MIN(MAX(min, x), max)) + +#ifdef __cplusplus + /* Use standard implementation from */ + #define SWAP(a,b) std::swap(a, b) +#elif COMPILER_TYPEOF + /*! + * Type-generic macro to swap \a a with \a b. + * + * \note Arguments are evaluated multiple times. + */ + #define SWAP(a, b) \ + do { \ + (void)(&(a) == &(b)); /* type check */ \ + typeof(a) tmp; \ + tmp = (a); \ + (a) = (b); \ + (b) = tmp; \ + } while (0) +#else /* !COMPILER_TYPEOF */ + /* Sub-optimal implementation that only works with integral types. */ + #define SWAP(a, b) ((a) ^= (b) ^= (a) ^= (b)) +#endif /* COMPILER_TYPEOF */ #ifndef BV -/*! Convert a bit value to a binary flag */ -#define BV(x) (1<<(x)) + /*! Convert a bit value to a binary flag. */ + #define BV(x) (1<<(x)) #endif /*! Round up \a x to an even multiple of the 2's power \a pad */ @@ -79,20 +151,15 @@ #define UINT32_LOG2(x) \ ((x < 65536UL) ? UINT16_LOG2(x) : UINT16_LOG2((x) >> 16) + 16) -#if COMPILER_C99 - /*! Count the number of arguments (up to 16) */ +#if COMPILER_VARIADIC_MACROS + /*! Count the number of arguments (up to 16). */ #define PP_COUNT(...) \ PP_COUNT__(__VA_ARGS__,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0) #define PP_COUNT__(a0,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,count,...) \ count #endif -/*! Issue a compilation error if the \a condition is false */ -#define STATIC_ASSERT(condition) \ - extern char CT_ASSERT___[(condition) ? 1 : -1] - - -#if COMPILER_C99 +#if COMPILER_VARIADIC_MACROS /*! * \def BIT_CHANGE(reg, (mask, value), ...) * @@ -130,7 +197,6 @@ * \note This macro is available only in C99 because it makes use of variadic macros. * It would be possible to make up an implementation with a slightly different syntax * for use with C90 compilers, through Boost Preprocessor. - * */ /*! @@ -138,7 +204,6 @@ * * Similar to BIT_CHANGE(), but get bits instead of masks (and applies BV() to convert * them to masks). - * */ #define BIT_EXTRACT_FLAG_0(bit, value) bit @@ -191,7 +256,7 @@ #define BIT_CHANGE(reg, ...) BIT_CHANGE__(reg, 0, __VA_ARGS__) #define BIT_CHANGE_BV(reg, ...) BIT_CHANGE__(reg, 1, __VA_ARGS__) -#endif /* COMPILER_C99 */ +#endif /* COMPILER_VARIADIC_MACROS */ #endif /* MACROS_H */