4 * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2001, 2002, 2003 Bernardo Innocenti <bernie@codewiz.org>
6 * This file is part of DevLib - See devlib/README for information.
9 * \brief Additional support macros for compiler independance
12 * \author Bernardo Innocenti <bernie@develer.com>
17 *#* Revision 1.30 2004/11/16 22:30:19 bernie
18 *#* Declare fixed-size types before other types.
20 *#* Revision 1.29 2004/11/16 20:34:40 bernie
21 *#* UNUSED_VAR, USED_VAR, USED_FUNC: New macros; UNUSED_ARG: Rename from UNUSED.
23 *#* Revision 1.28 2004/10/21 11:03:52 bernie
26 *#* Revision 1.27 2004/10/21 10:09:40 bernie
27 *#* Remove spurious token in preprocessor directive.
29 *#* Revision 1.26 2004/10/19 08:55:14 bernie
30 *#* UNUSED_FUNC: New function attribute.
32 *#* Revision 1.25 2004/10/19 07:14:20 bernie
33 *#* Add macros to test for specific compiler features.
35 *#* Revision 1.24 2004/10/03 18:35:13 bernie
36 *#* Poison C++ keywords in C programs for better portability.
38 *#* Revision 1.23 2004/09/20 03:30:27 bernie
39 *#* Remove vsprintf_P() proto, no longer needed with avr-libc 1.0.4.
41 *#* Revision 1.22 2004/09/14 21:03:04 bernie
42 *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
44 *#* Revision 1.21 2004/09/06 21:38:31 bernie
45 *#* Misc documentation and style fixes.
47 *#* Revision 1.20 2004/08/29 21:57:58 bernie
48 *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
49 *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
51 *#* Revision 1.19 2004/08/25 14:12:08 rasky
52 *#* Aggiornato il comment block dei log RCS
54 *#* Revision 1.18 2004/08/24 16:32:37 bernie
55 *#* Document custom types.
57 *#* Revision 1.17 2004/08/24 13:32:14 bernie
58 *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
59 *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
61 *#* Rename header guards;
62 *#* Don't include arch_config.h in compiler.h as it's not needed there.
64 *#* Revision 1.16 2004/08/14 19:37:57 rasky
65 *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
67 *#* Revision 1.15 2004/08/13 03:23:26 bernie
68 *#* Adjust a few MSVC tweaks from older projects.
70 *#* Revision 1.14 2004/08/10 06:56:29 bernie
71 *#* RESTRICT: New C99-like macro; STATIC_ASSERT: Fix warning for multiple invocation in one file.
73 *#* Revision 1.13 2004/08/02 20:20:29 aleph
74 *#* Merge from project_ks
76 *#* Revision 1.12 2004/08/01 01:21:17 bernie
77 *#* LIKELY(), UNLIKELY(): New compiler-specific macros.
79 *#* Revision 1.11 2004/07/30 14:34:10 rasky
80 *#* Vari fix per documentazione e commenti
81 *#* Aggiunte PP_CATn e STATIC_ASSERT
83 *#* Revision 1.10 2004/07/30 14:15:53 rasky
84 *#* Nuovo supporto unificato per detect della CPU
86 *#* Revision 1.9 2004/07/29 22:57:09 bernie
87 *#* vsprintf(): Remove prototype for backwards compatibility with GCC 3.4; ssize_t: Add definition for inferior compilers.
89 #ifndef DEVLIB_COMPILER_H
90 #define DEVLIB_COMPILER_H
92 #include "cpu_detect.h"
95 #if defined __GNUC__ && defined __GNUC_MINOR__
96 #define GNUC_PREREQ(maj, min) \
97 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
99 #define GNUC_PREREQ(maj, min) 0
102 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
103 #define COMPILER_C99 1
105 #define COMPILER_C99 0
109 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
110 #define PP_CAT(x,y) PP_CAT__(x,y)
111 #define PP_CAT__(x,y) x ## y
112 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
113 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
114 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
116 /*! String-ize a token (allowing macros to expand) */
117 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
118 #define PP_STRINGIZE__(x) #x
121 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
122 #pragma language=extended
123 #define INTERRUPT(x) interrupt [x]
124 #define REGISTER shortad
125 #define INLINE /* unsupported */
127 /* Imported from <longjmp.h>. Unfortunately, we can't just include
128 * this header because it typedefs jmp_buf to be an array of chars.
129 * This would allow the compiler to place the buffer on an odd address.
130 * The CPU _should_ be able to perform word accesses to
131 * unaligned data, but there are *BUGS* in the 80196KC with
132 * some combinations of opcodes and addressing modes. One of
133 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
134 * provided by the IAR compiler ANSI C library. When ?GR contains
135 * an odd address, surprisingly the CPU will copy the high order
136 * byte of the source operand (SP) in the low order byte of the
137 * destination operand (the memory location pointed to by ?GR).
139 * We also need to replace the library setjmp()/longjmp() with
140 * our own versions because the IAR implementation "forgets" to
141 * save the contents of local registers (?LR).
145 void * sp; /* Stack pointer */
146 void * return_addr; /* Return address */
147 int lr[6]; /* 6 local registers */
150 typedef struct _JMP_BUF jmp_buf[1];
152 int setjmp(jmp_buf env);
153 void longjmp(jmp_buf env, int val);
155 /* Fake bool support */
158 typedef unsigned char bool;
160 #elif defined(_MSC_VER) /* Win32 emulation support */
163 #include <time.h> /* for time_t */
165 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
168 /* Fake bool support */
173 #endif /* !__cplusplus */
175 /* These C99 functions are oddly named in MSVCRT32.lib */
176 #define snprintf _snprintf
177 #define vsnprintf _vsnprintf
179 #elif defined(__GNUC__)
181 /* Compiler features */
182 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
183 #define COMPILER_TYPEOF 1
184 #define COMPILER_STATEMENT_EXPRESSIONS 1
187 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
188 #define NORETURN __attribute__((__noreturn__))
189 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
190 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
191 #define USED_VAR(type,name) __attribute__((__used__)) type name
192 #define INLINE static inline __attribute__((__always_inline__))
193 #define LIKELY(x) __builtin_expect(!!(x), 1)
194 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
195 #define PURE_FUNC __attribute__((pure))
196 #define CONST_FUNC __attribute__((const))
197 #define UNUSED_FUNC __attribute__((unused))
198 #define USED_FUNC __attribute__((__used__))
199 #define RESTRICT __restrict__
200 #define MUST_CHECK __attribute__((warn_unused_result))
202 #define DEPRECATED __attribute__((__deprecated__))
207 /* Hack to avoid conflicts with system type */
208 #define sigset_t system_sigset_t
212 #undef system_sigset_t
219 /* Support for harvard architectures */
221 #define PGM_READ_CHAR(s) pgm_read_byte(s)
222 #define PGM_FUNC(x) x ## _P
223 #define PGM_ATTR PROGMEM
230 * Disallow some C++ keywords as identifiers in C programs,
231 * for improved portability.
233 #pragma GCC poison new delete class template typename
234 #pragma GCC poison private protected public operator
235 #pragma GCC poison friend mutable using namespace
236 #pragma GCC poison cin cout cerr clog
239 #elif defined(__MWERKS__) && CPU_DSP56K
241 /* Compiler features */
242 #define COMPILER_TYPEOF 1
243 #define COMPILER_STATEMENT_EXPRESSIONS 1
250 // CodeWarrior has size_t as built-in type, but does not define this symbol.
251 #define _SIZE_T_DEFINED
254 #error unknown compiler
258 /* Defaults for compiler extensions. */
261 * \def COMPILER_VARIADIC_MACROS
262 * Support for macros with variable arguments.
264 #ifndef COMPILER_HAVE_VARIADIC_MACROS
265 #define COMPILER_HAVE_VARIADIC_MACROS (COMPILER_C99 != 0)
269 * \def COMPILER_TYPEOF
270 * Support for macros with variable arguments.
272 #ifndef COMPILER_TYPEOF
273 #define COMPILER_TYPEOF 0
277 * \def COMPILER_STATEMENT_EXPRESSIONS
278 * Support for macros with variable arguments.
280 #ifndef COMPILER_STATEMENT_EXPRESSIONS
281 #define COMPILER_STATEMENT_EXPRESSIONS 0
284 /* A few defaults for missing compiler features. */
286 #define INLINE static inline
289 #define NORETURN /* nothing */
292 #define FORMAT(type,fmt,first) /* nothing */
295 #define DEPRECATED /* nothing */
298 #define UNUSED_ARG(type,arg) type arg
300 #define UNUSED UNUSED_ARG /* OBSOLETE */
302 #define UNUSED_VAR(type,name) type name
305 #define USED_VAR(type,name) type name
308 #define REGISTER /* nothing */
311 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
317 #define UNLIKELY(x) x
320 #define PURE_FUNC /* nothing */
323 #define CONST_FUNC /* nothing */
326 #define UNUSED_FUNC /* nothing */
329 #define USED_FUNC /* nothing */
332 #define RESTRICT /* nothing */
335 #define MUST_CHECK /* nothing */
338 /* Support for harvard architectures */
340 #define PSTR /* nothing */
342 #ifndef PGM_READ_CHAR
343 #define PGM_READ_CHAR(s) (*(s))
346 #define PGM_FUNC(x) x
349 #define PGM_ATTR /* nothing */
353 /* Misc definitions */
355 #define NULL (void *)0
362 /* Support for hybrid C/C++ applications. */
364 #define EXTERN_C extern "C"
365 #define EXTERN_C_BEGIN extern "C" {
366 #define EXTERN_C_END }
368 #define EXTERN_C extern
369 #define EXTERN_C_BEGIN /* nothing */
370 #define EXTERN_C_END /* nothing */
374 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
376 * \name ISO C99 fixed-size types
378 * These should be in <stdint.h>, but many compilers lack them.
381 typedef signed char int8_t;
382 typedef short int int16_t;
383 typedef long int int32_t;
384 typedef unsigned char uint8_t;
385 typedef unsigned short int uint16_t;
386 typedef unsigned long int uint32_t;
388 #elif defined(__GNUC__) && CPU_AVR
389 /* avr-libc is weird... */
390 #include <inttypes.h>
392 /* This is the correct location. */
398 * Standard type definitions.
399 * These should be in <sys/types.h>, but many compilers lack them.
401 #if !(defined(size_t) || defined(_SIZE_T_DEFINED))
402 typedef unsigned int size_t;
405 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined))
407 #endif /* _TIME_T_DEFINED || __time_t_defined */
409 /*! Bulk storage large enough for both pointers or integers */
410 typedef void * iptr_t;
411 typedef const void * const_iptr_t;
412 #define IPTR iptr_t /* OBSOLETE */
414 typedef long utime_t; /*!< Type for time expressed in microseconds */
415 typedef unsigned char sig_t; /*!< Type for signal bits */
416 typedef unsigned char sigset_t; /*!< Type for signal masks */
417 typedef unsigned char page_t; /*!< Type for banked memory pages */
420 * \name Types for hardware registers.
422 * Only use these types for registers whose contents can
423 * be changed asynchronously by external hardware.
428 /* Registers can be accessed only through 16-bit pointers */
429 typedef volatile uint16_t reg16_t;
431 typedef volatile uint8_t reg8_t;
432 typedef volatile uint16_t reg16_t;
433 typedef volatile uint32_t reg32_t;
438 /* Quasi-ANSI macros */
441 * Return the byte offset of the member \a m in struct \a s.
443 * \note This macro should be defined in "stddef.h" and is sometimes
444 * compiler-specific (g++ has a builtin for it).
446 #define offsetof(s,m) (size_t)&(((s *)0)->m)
450 * Count the number of elements in the static array \a a.
452 * \note This macro is non-standard, but implements a very common idiom
454 #define countof(a) (sizeof(a) / sizeof(*(a)))
457 /*! Issue a compilation error if the \a condition is false */
458 #define STATIC_ASSERT(condition) \
459 UNUSED_VAR(extern char,PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1])
461 #endif /* DEVLIB_COMPILER_H */