4 * Copyright 2003, 2004, 2005 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 README.devlib for information.
9 * \brief Additional support macros for compiler independance
12 * \author Bernardo Innocenti <bernie@develer.com>
17 *#* Revision 1.43 2005/03/01 23:15:12 bernie
18 *#* Remove compatibility hack.
20 *#* Revision 1.42 2005/02/16 20:28:46 bernie
21 *#* Move PGM macros to mware/pgm.h
23 *#* Revision 1.41 2005/01/22 04:19:22 bernie
24 *#* MTIME_INFINITE: New constant.
26 *#* Revision 1.40 2005/01/20 18:46:04 aleph
27 *#* Add progmem datatypes; PSTR() definition.
29 #ifndef DEVLIB_COMPILER_H
30 #define DEVLIB_COMPILER_H
32 #include "cpu_detect.h"
35 #if defined __GNUC__ && defined __GNUC_MINOR__
36 #define GNUC_PREREQ(maj, min) \
37 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
39 #define GNUC_PREREQ(maj, min) 0
42 /* Some CW versions do not allow enabling C99 from the settings panel. */
43 #if defined(__MWERKS__)
47 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
48 #define COMPILER_C99 1
50 #define COMPILER_C99 0
54 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
55 #define PP_CAT(x,y) PP_CAT__(x,y)
56 #define PP_CAT__(x,y) x ## y
57 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
58 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
59 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
61 /*! String-ize a token (allowing macros to expand) */
62 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
63 #define PP_STRINGIZE__(x) #x
66 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
67 #pragma language=extended
68 #define INTERRUPT(x) interrupt [x]
69 #define REGISTER shortad
70 #define INLINE /* unsupported */
73 * Imported from <longjmp.h>. Unfortunately, we can't just include
74 * this header because it typedefs jmp_buf to be an array of chars.
75 * This would allow the compiler to place the buffer on an odd address.
76 * The CPU _should_ be able to perform word accesses to
77 * unaligned data, but there are *BUGS* in the 80196KC with
78 * some combinations of opcodes and addressing modes. One of
79 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
80 * provided by the IAR compiler ANSI C library. When ?GR contains
81 * an odd address, surprisingly the CPU will copy the high order
82 * byte of the source operand (SP) in the low order byte of the
83 * destination operand (the memory location pointed to by ?GR).
85 * We also need to replace the library setjmp()/longjmp() with
86 * our own versions because the IAR implementation "forgets" to
87 * save the contents of local registers (?LR).
91 void *sp; /* Stack pointer */
92 void *return_addr; /* Return address */
93 int lr[6]; /* 6 local registers */
96 typedef struct _JMP_BUF jmp_buf[1];
98 int setjmp(jmp_buf env);
99 void longjmp(jmp_buf env, int val);
101 /* Fake bool support */
104 typedef unsigned char bool;
106 #elif defined(_MSC_VER) /* Win32 emulation support */
110 /* FIXME: I can't remember why exactly this was needed (NdBernie) */
113 /* MSVC doesn't provide <stdbool.h>. */
118 #endif /* !__cplusplus */
120 /* These C99 functions are oddly named in MSVCRT32.lib */
121 #define snprintf _snprintf
122 #define vsnprintf _vsnprintf
124 #elif defined(__GNUC__)
126 /* Compiler features */
127 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
128 #define COMPILER_TYPEOF 1
129 #define COMPILER_STATEMENT_EXPRESSIONS 1
132 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
133 #define NORETURN __attribute__((__noreturn__))
134 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
135 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
136 #define USED_VAR(type,name) __attribute__((__used__)) type name
137 #define INLINE static inline __attribute__((__always_inline__))
138 #define LIKELY(x) __builtin_expect(!!(x), 1)
139 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
140 #define PURE_FUNC __attribute__((pure))
141 #define CONST_FUNC __attribute__((const))
142 #define UNUSED_FUNC __attribute__((unused))
143 #define USED_FUNC __attribute__((__used__))
144 #define RESTRICT __restrict__
145 #define MUST_CHECK __attribute__((warn_unused_result))
147 #define DEPRECATED __attribute__((__deprecated__))
154 /* Include some standard C89/C99 stuff */
162 * Disallow some C++ keywords as identifiers in C programs,
163 * for improved portability.
165 #pragma GCC poison new delete class template typename
166 #pragma GCC poison private protected public operator
167 #pragma GCC poison friend mutable using namespace
168 #pragma GCC poison cin cout cerr clog
171 #elif defined(__MWERKS__) && CPU_DSP56K
173 /* Compiler features */
174 #define COMPILER_VARIADIC_MACROS 1
175 #define COMPILER_TYPEOF 1
176 #define COMPILER_STATEMENT_EXPRESSIONS 1
178 #define typeof __typeof__
185 // CodeWarrior has size_t as built-in type, but does not define this symbol.
186 #define _SIZE_T_DEFINED
189 #error unknown compiler
193 /* Defaults for compiler extensions. */
196 * \def COMPILER_VARIADIC_MACROS
197 * Support for macros with variable arguments.
199 #ifndef COMPILER_VARIADIC_MACROS
200 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
204 * \def COMPILER_TYPEOF
205 * Support for macros with variable arguments.
207 #ifndef COMPILER_TYPEOF
208 #define COMPILER_TYPEOF 0
212 * \def COMPILER_STATEMENT_EXPRESSIONS
213 * Support for macros with variable arguments.
215 #ifndef COMPILER_STATEMENT_EXPRESSIONS
216 #define COMPILER_STATEMENT_EXPRESSIONS 0
219 /* A few defaults for missing compiler features. */
221 #define INLINE static inline
224 #define NORETURN /* nothing */
227 #define FORMAT(type,fmt,first) /* nothing */
230 #define DEPRECATED /* nothing */
233 #define UNUSED_ARG(type,arg) type arg
235 #define UNUSED UNUSED_ARG /* OBSOLETE */
237 #define UNUSED_VAR(type,name) type name
240 #define USED_VAR(type,name) type name
243 #define REGISTER /* nothing */
246 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
252 #define UNLIKELY(x) x
255 #define PURE_FUNC /* nothing */
258 #define CONST_FUNC /* nothing */
261 #define UNUSED_FUNC /* nothing */
264 #define USED_FUNC /* nothing */
267 #define RESTRICT /* nothing */
270 #define MUST_CHECK /* nothing */
273 /* Misc definitions */
275 #define NULL (void *)0
282 /* Support for hybrid C/C++ applications. */
284 #define EXTERN_C extern "C"
285 #define EXTERN_C_BEGIN extern "C" {
286 #define EXTERN_C_END }
288 #define EXTERN_C extern
289 #define EXTERN_C_BEGIN /* nothing */
290 #define EXTERN_C_END /* nothing */
294 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
296 * \name ISO C99 fixed-size types
298 * These should be in <stdint.h>, but many compilers lack them.
301 typedef signed char int8_t;
302 typedef short int int16_t;
303 typedef long int int32_t;
304 typedef unsigned char uint8_t;
305 typedef unsigned short int uint16_t;
306 typedef unsigned long int uint32_t;
308 #elif defined(__GNUC__) && CPU_AVR
309 /* avr-libc is weird... */
310 #include <inttypes.h>
312 /* This is the correct location. */
318 * The ATmega8 has a very small Flash, so we can't afford
319 * to link in support routines for 32bit integer arithmetic.
321 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
322 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
323 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
324 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
325 #define MTIME_INFINITE 0x7FFFL
327 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
328 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
329 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
330 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
331 #define MTIME_INFINITE 0x7FFFFFFFL
334 /*! Bulk storage large enough for both pointers or integers. */
335 typedef void * iptr_t;
336 typedef const void * const_iptr_t;
338 typedef unsigned char sig_t; /*!< Type for signal bits. */
339 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
340 typedef unsigned char page_t; /*!< Type for banked memory pages. */
344 * \name Standard type definitions.
346 * These should be in <sys/types.h> or <stddef.h>, but many compilers
347 * and C libraries lack them.
349 * We check for some common definitions to avoid redefinitions:
351 * glibc, avr-libc: _SIZE_T_DEFINED
352 * Darwin libc: _BSD_SIZE_T_DEFINED_
356 #if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_))
357 #if CPU_REG_BITS > 32
359 typedef unsigned long size_t;
360 typedef long ssize_t;
362 /* 32bit or 16bit. */
363 typedef unsigned int size_t;
368 #if !(defined(_TIME_T_DEFINED) || defined(__time_t_defined) || defined(_EMUL))
369 /*! For backwards compatibility. Use mtime_t in new code. */
370 #define time_t mtime_t
371 #define SIZEOF_TIME_T SIZEOF_MTIME_T
373 /* Just a guess, but quite safe. */
374 #define SIZEOF_TIME_T SIZEOF_LONG
375 #endif /* _TIME_T_DEFINED || __time_t_defined */
380 * \name Types for hardware registers.
382 * Only use these types for registers whose contents can
383 * be changed asynchronously by external hardware.
388 /* Registers can be accessed only through 16-bit pointers */
389 typedef volatile uint16_t reg16_t;
391 typedef volatile uint8_t reg8_t;
392 typedef volatile uint16_t reg16_t;
393 typedef volatile uint32_t reg32_t;
398 /* Quasi-ANSI macros */
401 * Return the byte offset of the member \a m in struct \a s.
403 * \note This macro should be defined in "stddef.h" and is sometimes
404 * compiler-specific (g++ has a builtin for it).
406 #define offsetof(s,m) (size_t)&(((s *)0)->m)
410 * Count the number of elements in the static array \a a.
412 * \note This macro is non-standard, but implements a very common idiom
414 #define countof(a) (sizeof(a) / sizeof(*(a)))
417 /*! Issue a compilation error if the \a condition is false */
418 #define STATIC_ASSERT(condition) \
419 UNUSED_VAR(extern char,PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1])
421 #endif /* DEVLIB_COMPILER_H */