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 1.12 2006/02/21 16:06:31 bernie
18 *#* Fix ssize_t redefinitions on glibc systems.
20 *#* Revision 1.11 2006/02/20 14:34:58 bernie
21 *#* Use portable type checking.
23 *#* Revision 1.10 2006/02/15 09:12:01 bernie
24 *#* Fixes for ARM/IAR support.
26 *#* Revision 1.9 2006/02/10 12:38:00 bernie
27 *#* Add support for ARM on IAR.
29 *#* Revision 1.8 2006/01/16 03:27:49 bernie
30 *#* Rename sig_t to sigbit_t to avoid clash with POSIX.
32 *#* Revision 1.7 2005/11/27 23:33:05 bernie
33 *#* Drop avr-libc hack for missing stdint.h.
35 *#* Revision 1.6 2005/07/19 07:27:31 bernie
36 *#* Don't use CPU_REG_BITS from cpu.h to avoid circular header dependendy.
38 *#* Revision 1.5 2005/06/27 21:24:37 bernie
39 *#* ticks_t: New typedef.
41 *#* Revision 1.4 2005/06/14 06:15:10 bernie
42 *#* Add X86_64 support.
44 *#* Revision 1.3 2005/04/12 01:37:01 bernie
45 *#* Metrowerks touchups from HeCo.
47 *#* Revision 1.2 2005/04/11 19:10:27 bernie
48 *#* Include top-level headers from cfg/ subdir.
50 *#* Revision 1.1 2005/04/11 19:04:13 bernie
51 *#* Move top-level headers to cfg/ subdir.
53 *#* Revision 1.44 2005/03/29 06:39:59 bernie
54 *#* setjmp.h, time_t: Remove ancient retrocompatibility; Remove MSVC double to float hack.
56 *#* Revision 1.43 2005/03/01 23:15:12 bernie
57 *#* Remove compatibility hack.
59 *#* Revision 1.42 2005/02/16 20:28:46 bernie
60 *#* Move PGM macros to mware/pgm.h
62 *#* Revision 1.41 2005/01/22 04:19:22 bernie
63 *#* MTIME_INFINITE: New constant.
65 *#* Revision 1.40 2005/01/20 18:46:04 aleph
66 *#* Add progmem datatypes; PSTR() definition.
68 #ifndef DEVLIB_COMPILER_H
69 #define DEVLIB_COMPILER_H
71 #include <cfg/cpu_detect.h>
74 #if defined __GNUC__ && defined __GNUC_MINOR__
75 #define GNUC_PREREQ(maj, min) \
76 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
78 #define GNUC_PREREQ(maj, min) 0
81 /* Some CW versions do not allow enabling C99 from the settings panel. */
82 #if defined(__MWERKS__)
86 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
87 #define COMPILER_C99 1
89 #define COMPILER_C99 0
93 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
94 #define PP_CAT(x,y) PP_CAT__(x,y)
95 #define PP_CAT__(x,y) x ## y
96 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
97 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
98 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
100 /*! String-ize a token (allowing macros to expand) */
101 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
102 #define PP_STRINGIZE__(x) #x
105 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
107 #pragma language=extended
111 #define COMPILER_VARIADIC_MACROS 1
113 #define INTERRUPT(x) __irq __arm void x (void)
114 #define INLINE static inline
116 /* Include some standard C89/C99 stuff */
123 // IAR has size_t as built-in type, but does not define this symbol.
124 #define _SIZE_T_DEFINED
126 #define INTERRUPT(x) interrupt [x]
127 #define REGISTER shortad
128 #define INLINE /* unsupported */
131 * Imported from <longjmp.h>. Unfortunately, we can't just include
132 * this header because it typedefs jmp_buf to be an array of chars.
133 * This would allow the compiler to place the buffer on an odd address.
134 * The CPU _should_ be able to perform word accesses to
135 * unaligned data, but there are *BUGS* in the 80196KC with
136 * some combinations of opcodes and addressing modes. One of
137 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
138 * provided by the IAR compiler ANSI C library. When ?GR contains
139 * an odd address, surprisingly the CPU will copy the high order
140 * byte of the source operand (SP) in the low order byte of the
141 * destination operand (the memory location pointed to by ?GR).
143 * We also need to replace the library setjmp()/longjmp() with
144 * our own versions because the IAR implementation "forgets" to
145 * save the contents of local registers (?LR).
149 void *sp; /* Stack pointer */
150 void *return_addr; /* Return address */
151 int lr[6]; /* 6 local registers */
154 typedef struct _JMP_BUF jmp_buf[1];
156 int setjmp(jmp_buf env);
157 void longjmp(jmp_buf env, int val);
159 /* Fake bool support */
162 typedef unsigned char bool;
165 #error Unsupported CPU
168 #elif defined(_MSC_VER) /* Win32 emulation support */
170 /* MSVC doesn't provide <stdbool.h>. */
175 #endif /* !__cplusplus */
177 /* These C99 functions are oddly named in MSVCRT32.lib */
178 #define snprintf _snprintf
179 #define vsnprintf _vsnprintf
181 #elif defined(__GNUC__)
183 /* Compiler features */
184 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
185 #define COMPILER_TYPEOF 1
186 #define COMPILER_STATEMENT_EXPRESSIONS 1
189 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
190 #define NORETURN __attribute__((__noreturn__))
191 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
192 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
193 #define USED_VAR(type,name) __attribute__((__used__)) type name
194 #define INLINE static inline __attribute__((__always_inline__))
195 #define LIKELY(x) __builtin_expect(!!(x), 1)
196 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
197 #define PURE_FUNC __attribute__((pure))
198 #define CONST_FUNC __attribute__((const))
199 #define UNUSED_FUNC __attribute__((unused))
200 #define USED_FUNC __attribute__((__used__))
201 #define RESTRICT __restrict__
202 #define MUST_CHECK __attribute__((warn_unused_result))
204 #define DEPRECATED __attribute__((__deprecated__))
208 #define ASSERT_TYPE_EQUAL(var1, var2) \
209 STATIC_ASSERT(__builtin_types_compatible_p(typeof(var1), typeof(var2)))
210 #define ASSERT_TYPE_IS(var, type) \
211 STATIC_ASSERT(__builtin_types_compatible_p(typeof(var), type))
214 /* Include some standard C89/C99 stuff */
218 #include <sys/types.h> /* for ssize_t */
222 * Disallow some C++ keywords as identifiers in C programs,
223 * for improved portability.
225 #pragma GCC poison new delete class template typename
226 #pragma GCC poison private protected public operator
227 #pragma GCC poison friend mutable using namespace
228 #pragma GCC poison cin cout cerr clog
231 #elif defined(__MWERKS__)
233 /* Compiler features */
234 #define COMPILER_VARIADIC_MACROS 1
235 #define COMPILER_TYPEOF 1
236 #define COMPILER_STATEMENT_EXPRESSIONS 1
238 #define typeof __typeof__
240 #define UNUSED_ARG(type,arg) type
246 // CodeWarrior has size_t as built-in type, but does not define this symbol.
247 #define _SIZE_T_DEFINED
250 #error unknown compiler
254 /* Defaults for compiler extensions. */
257 * \def COMPILER_VARIADIC_MACROS
258 * Support for macros with variable arguments.
260 #ifndef COMPILER_VARIADIC_MACROS
261 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
265 * \def COMPILER_TYPEOF
266 * Support for dynamic type identification.
268 #ifndef COMPILER_TYPEOF
269 #define COMPILER_TYPEOF 0
273 * \def COMPILER_STATEMENT_EXPRESSIONS
274 * Support for statement expressions.
276 #ifndef COMPILER_STATEMENT_EXPRESSIONS
277 #define COMPILER_STATEMENT_EXPRESSIONS 0
280 /* A few defaults for missing compiler features. */
282 #define INLINE static inline
285 #define NORETURN /* nothing */
288 #define FORMAT(type,fmt,first) /* nothing */
291 #define DEPRECATED /* nothing */
294 #define UNUSED_ARG(type,arg) type arg
296 #define UNUSED UNUSED_ARG /* OBSOLETE */
298 #define UNUSED_VAR(type,name) type name
301 #define USED_VAR(type,name) type name
304 #define REGISTER /* nothing */
307 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
313 #define UNLIKELY(x) x
316 #define PURE_FUNC /* nothing */
319 #define CONST_FUNC /* nothing */
322 #define UNUSED_FUNC /* nothing */
325 #define USED_FUNC /* nothing */
328 #define RESTRICT /* nothing */
331 #define MUST_CHECK /* nothing */
334 /* Misc definitions */
336 #define NULL (void *)0
343 /* Support for hybrid C/C++ applications. */
345 #define EXTERN_C extern "C"
346 #define EXTERN_C_BEGIN extern "C" {
347 #define EXTERN_C_END }
348 #define EXTERN_CONST extern const
350 #define EXTERN_C extern
351 #define EXTERN_C_BEGIN /* nothing */
352 #define EXTERN_C_END /* nothing */
353 #define EXTERN_CONST const
357 #if defined(_MSC_VER)
358 || ((defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)) && CPU_I196)
360 * \name ISO C99 fixed-size types
362 * These should be in <stdint.h>, but a few compilers lack them.
365 typedef signed char int8_t;
366 typedef unsigned char uint8_t;
367 typedef short int int16_t;
368 typedef unsigned short int uint16_t;
369 typedef long int int32_t; /* _WIN64 safe */
370 typedef unsigned long int uint32_t; /* _WIN64 safe */
373 typedef __int64 int64_t;
374 typedef unsigned __int64 uint64_t;
376 typedef long long int64_t;
377 typedef unsigned long long uint64_t;
381 /* This is the standard location. */
387 * The ATmega8 has a very small Flash, so we can't afford
388 * to link in support routines for 32bit integer arithmetic.
390 typedef int16_t ticks_t; /*!< Type for time expressed in ticks. */
391 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
392 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
393 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
394 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
395 #define MTIME_INFINITE 0x7FFFL
397 typedef int32_t ticks_t; /*!< Type for time expressed in ticks. */
398 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
399 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
400 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
401 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
402 #define MTIME_INFINITE 0x7FFFFFFFL
405 /*! Bulk storage large enough for both pointers or integers. */
406 typedef void * iptr_t;
408 /*! Bulk storage large enough for both pointers to constants or integers. */
409 typedef const void * const_iptr_t;
411 typedef unsigned char sigbit_t; /*!< Type for signal bits. */
412 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
413 typedef unsigned char page_t; /*!< Type for banked memory pages. */
417 * \name Standard type definitions.
419 * These should be in <sys/types.h> or <stddef.h>, but many compilers
420 * and C libraries lack them.
422 * We check for some common definitions to avoid redefinitions:
424 * glibc, avr-libc: _SIZE_T_DEFINED, __ssize_t_defined
425 * Darwin libc: _BSD_SIZE_T_DEFINED_
430 #if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_) \
433 /* 32bit or 64bit (32bit for _WIN64). */
434 typedef unsigned long size_t;
440 #if !(defined(ssize_t) || defined(__ssize_t_defined))
442 /* 32bit or 64bit (32bit for _WIN64). */
443 typedef long ssize_t;
447 /* 16bit (missing in avr-libc's sys/types.h). */
457 * \name Types for hardware registers.
459 * Only use these types for registers whose contents can
460 * be changed asynchronously by external hardware.
465 /* Registers can be accessed only through 16-bit pointers */
466 typedef volatile uint16_t reg16_t;
468 typedef volatile uint8_t reg8_t;
469 typedef volatile uint16_t reg16_t;
470 typedef volatile uint32_t reg32_t;
475 /* Quasi-ANSI macros */
478 * Return the byte offset of the member \a m in struct \a s.
480 * \note This macro should be defined in "stddef.h" and is sometimes
481 * compiler-specific (g++ has a builtin for it).
483 #define offsetof(s,m) (size_t)&(((s *)0)->m)
487 * Count the number of elements in the static array \a a.
489 * \note This macro is non-standard, but implements a very common idiom
491 #define countof(a) (sizeof(a) / sizeof(*(a)))
494 /*! Issue a compilation error if the \a condition is false */
495 #define STATIC_ASSERT(condition) \
496 UNUSED_VAR(extern char, STATIC_ASSERTION_FAILED__[(condition) ? 1 : -1])
498 #ifndef ASSERT_TYPE_EQUAL
499 /*! Ensure two variables have the same type. */
500 #define ASSERT_TYPE_EQUAL(var1, var2) \
501 do { (void)(&(var1) == &(var2)); } while(0)
504 #ifndef ASSERT_TYPE_IS
505 /*! Ensure variable is of specified type. */
506 #define ASSERT_TYPE_IS(var, type) \
507 do { (void)(&var == (type *)0); } while(0)
510 #endif /* DEVLIB_COMPILER_H */