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 1.19 2006/04/11 00:07:33 bernie
18 *#* Implemenent MF_SAVESEL flag.
20 *#* Revision 1.18 2006/03/22 13:34:34 bernie
23 *#* Revision 1.17 2006/03/22 09:48:35 bernie
26 *#* Revision 1.16 2006/03/20 17:48:09 bernie
27 *#* Fix for avr-libc; INTERRUPT(): Remove macro.
29 *#* Revision 1.15 2006/03/13 02:06:25 bernie
30 *#* containerof(): New macro.
32 *#* Revision 1.14 2006/02/23 08:36:33 bernie
33 *#* Emulate __func__ on MSVC.
35 *#* Revision 1.13 2006/02/23 07:37:37 bernie
36 *#* Compile fix for MSVC.
38 *#* Revision 1.12 2006/02/21 16:06:31 bernie
39 *#* Fix ssize_t redefinitions on glibc systems.
41 *#* Revision 1.11 2006/02/20 14:34:58 bernie
42 *#* Use portable type checking.
44 *#* Revision 1.10 2006/02/15 09:12:01 bernie
45 *#* Fixes for ARM/IAR support.
47 *#* Revision 1.9 2006/02/10 12:38:00 bernie
48 *#* Add support for ARM on IAR.
50 *#* Revision 1.8 2006/01/16 03:27:49 bernie
51 *#* Rename sig_t to sigbit_t to avoid clash with POSIX.
53 *#* Revision 1.7 2005/11/27 23:33:05 bernie
54 *#* Drop avr-libc hack for missing stdint.h.
56 *#* Revision 1.6 2005/07/19 07:27:31 bernie
57 *#* Don't use CPU_REG_BITS from cpu.h to avoid circular header dependendy.
59 *#* Revision 1.5 2005/06/27 21:24:37 bernie
60 *#* ticks_t: New typedef.
62 *#* Revision 1.4 2005/06/14 06:15:10 bernie
63 *#* Add X86_64 support.
65 *#* Revision 1.3 2005/04/12 01:37:01 bernie
66 *#* Metrowerks touchups from HeCo.
68 *#* Revision 1.2 2005/04/11 19:10:27 bernie
69 *#* Include top-level headers from cfg/ subdir.
71 *#* Revision 1.1 2005/04/11 19:04:13 bernie
72 *#* Move top-level headers to cfg/ subdir.
74 *#* Revision 1.44 2005/03/29 06:39:59 bernie
75 *#* setjmp.h, time_t: Remove ancient retrocompatibility; Remove MSVC double to float hack.
77 *#* Revision 1.43 2005/03/01 23:15:12 bernie
78 *#* Remove compatibility hack.
80 *#* Revision 1.42 2005/02/16 20:28:46 bernie
81 *#* Move PGM macros to mware/pgm.h
83 *#* Revision 1.41 2005/01/22 04:19:22 bernie
84 *#* MTIME_INFINITE: New constant.
86 *#* Revision 1.40 2005/01/20 18:46:04 aleph
87 *#* Add progmem datatypes; PSTR() definition.
89 #ifndef DEVLIB_COMPILER_H
90 #define DEVLIB_COMPILER_H
92 #include <cfg/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 /* Some CW versions do not allow enabling C99 from the settings panel. */
103 #if defined(__MWERKS__)
107 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
108 #define COMPILER_C99 1
110 #define COMPILER_C99 0
114 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
115 #define PP_CAT(x,y) PP_CAT__(x,y)
116 #define PP_CAT__(x,y) x ## y
117 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
118 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
119 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
121 /*! String-ize a token (allowing macros to expand) */
122 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
123 #define PP_STRINGIZE__(x) #x
126 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
128 #pragma language=extended
132 #define COMPILER_VARIADIC_MACROS 1
134 #define INTERRUPT(x) __irq __arm void x (void)
135 #define INLINE static inline
137 /* Include some standard C89/C99 stuff */
144 // IAR has size_t as built-in type, but does not define this symbol.
145 #define _SIZE_T_DEFINED
147 #define INTERRUPT(x) interrupt [x]
148 #define REGISTER shortad
149 #define INLINE /* unsupported */
152 * Imported from <longjmp.h>. Unfortunately, we can't just include
153 * this header because it typedefs jmp_buf to be an array of chars.
154 * This would allow the compiler to place the buffer on an odd address.
155 * The CPU _should_ be able to perform word accesses to
156 * unaligned data, but there are *BUGS* in the 80196KC with
157 * some combinations of opcodes and addressing modes. One of
158 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
159 * provided by the IAR compiler ANSI C library. When ?GR contains
160 * an odd address, surprisingly the CPU will copy the high order
161 * byte of the source operand (SP) in the low order byte of the
162 * destination operand (the memory location pointed to by ?GR).
164 * We also need to replace the library setjmp()/longjmp() with
165 * our own versions because the IAR implementation "forgets" to
166 * save the contents of local registers (?LR).
170 void *sp; /* Stack pointer */
171 void *return_addr; /* Return address */
172 int lr[6]; /* 6 local registers */
175 typedef struct _JMP_BUF jmp_buf[1];
177 int setjmp(jmp_buf env);
178 void longjmp(jmp_buf env, int val);
180 /* Fake bool support */
183 typedef unsigned char bool;
186 #error Unsupported CPU
189 #elif defined(_MSC_VER) /* Win32 emulation support */
191 /* MSVC doesn't provide <stdbool.h>. */
196 #endif /* !__cplusplus */
198 /* These C99 functions are oddly named in MSVCRT32.lib */
199 #define snprintf _snprintf
200 #define vsnprintf _vsnprintf
202 /* MSVC doesn't support C99's __func__, but has a similar extension. */
203 #define __func__ __FUNCTION__
205 /* MSVC doesn't support C99's inline keyword */
207 #define INLINE __inline
210 #elif defined(__GNUC__)
212 /* Compiler features */
213 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
214 #define COMPILER_TYPEOF 1
215 #define COMPILER_STATEMENT_EXPRESSIONS 1
218 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
219 #define NORETURN __attribute__((__noreturn__))
220 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
221 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
222 #define USED_VAR(type,name) __attribute__((__used__)) type name
223 #define INLINE static inline __attribute__((__always_inline__))
224 #define LIKELY(x) __builtin_expect(!!(x), 1)
225 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
226 #define PURE_FUNC __attribute__((pure))
227 #define CONST_FUNC __attribute__((const))
228 #define UNUSED_FUNC __attribute__((unused))
229 #define USED_FUNC __attribute__((__used__))
230 #define RESTRICT __restrict__
231 #define MUST_CHECK __attribute__((warn_unused_result))
233 #define DEPRECATED __attribute__((__deprecated__))
237 #define ASSERT_TYPE_EQUAL(var1, var2) \
238 STATIC_ASSERT(__builtin_types_compatible_p(typeof(var1), typeof(var2)))
239 #define ASSERT_TYPE_IS(var, type) \
240 STATIC_ASSERT(__builtin_types_compatible_p(typeof(var), type))
243 /* Include some standard C89/C99 stuff */
248 #include <sys/types.h> /* for ssize_t */
253 * Disallow some C++ keywords as identifiers in C programs,
254 * for improved portability.
256 #pragma GCC poison new delete class template typename
257 #pragma GCC poison private protected public operator
258 #pragma GCC poison friend mutable using namespace
259 #pragma GCC poison cin cout cerr clog
262 #elif defined(__MWERKS__)
264 /* Compiler features */
265 #define COMPILER_VARIADIC_MACROS 1
266 #define COMPILER_TYPEOF 1
267 #define COMPILER_STATEMENT_EXPRESSIONS 1
269 #define typeof __typeof__
271 #define UNUSED_ARG(type,arg) type
277 // CodeWarrior has size_t as built-in type, but does not define this symbol.
278 #define _SIZE_T_DEFINED
281 #error unknown compiler
285 /* Defaults for compiler extensions. */
288 * \def COMPILER_VARIADIC_MACROS
289 * Support for macros with variable arguments.
291 #ifndef COMPILER_VARIADIC_MACROS
292 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
296 * \def COMPILER_TYPEOF
297 * Support for dynamic type identification.
299 #ifndef COMPILER_TYPEOF
300 #define COMPILER_TYPEOF 0
304 * \def COMPILER_STATEMENT_EXPRESSIONS
305 * Support for statement expressions.
307 #ifndef COMPILER_STATEMENT_EXPRESSIONS
308 #define COMPILER_STATEMENT_EXPRESSIONS 0
311 /* A few defaults for missing compiler features. */
313 #define INLINE static inline
316 #define NORETURN /* nothing */
319 #define FORMAT(type,fmt,first) /* nothing */
322 #define DEPRECATED /* nothing */
325 #define UNUSED_ARG(type,arg) type arg
327 #define UNUSED UNUSED_ARG /* OBSOLETE */
329 #define UNUSED_VAR(type,name) type name
332 #define USED_VAR(type,name) type name
335 #define REGISTER /* nothing */
341 #define UNLIKELY(x) x
344 #define PURE_FUNC /* nothing */
347 #define CONST_FUNC /* nothing */
350 #define UNUSED_FUNC /* nothing */
353 #define USED_FUNC /* nothing */
356 #define RESTRICT /* nothing */
359 #define MUST_CHECK /* nothing */
362 /* Misc definitions */
364 #define NULL (void *)0
371 /* Support for hybrid C/C++ applications. */
373 #define EXTERN_C extern "C"
374 #define EXTERN_C_BEGIN extern "C" {
375 #define EXTERN_C_END }
376 #define EXTERN_CONST extern const
377 #define CONST_CAST(TYPE,EXPR) (const_cast<TYPE>(EXPR))
379 #define EXTERN_C extern
380 #define EXTERN_C_BEGIN /* nothing */
381 #define EXTERN_C_END /* nothing */
382 #define EXTERN_CONST const
383 #define CONST_CAST(TYPE,EXPR) ((TYPE)(EXPR)) /* FIXME: How can we suppress the warning in C? */
387 #if defined(_MSC_VER) \
388 || ((defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)) && CPU_I196)
390 * \name ISO C99 fixed-size types
392 * These should be in <stdint.h>, but a few compilers lack them.
395 typedef signed char int8_t;
396 typedef unsigned char uint8_t;
397 typedef short int int16_t;
398 typedef unsigned short int uint16_t;
399 typedef long int int32_t; /* _WIN64 safe */
400 typedef unsigned long int uint32_t; /* _WIN64 safe */
403 typedef __int64 int64_t;
404 typedef unsigned __int64 uint64_t;
406 typedef long long int64_t;
407 typedef unsigned long long uint64_t;
411 /* This is the standard location. */
417 * The ATmega8 has a very small Flash, so we can't afford
418 * to link in support routines for 32bit integer arithmetic.
420 typedef int16_t ticks_t; /*!< Type for time expressed in ticks. */
421 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
422 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
423 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
424 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
425 #define MTIME_INFINITE 0x7FFFL
427 typedef int32_t ticks_t; /*!< Type for time expressed in ticks. */
428 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
429 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
430 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
431 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
432 #define MTIME_INFINITE 0x7FFFFFFFL
435 /*! Bulk storage large enough for both pointers or integers. */
436 typedef void * iptr_t;
438 /*! Bulk storage large enough for both pointers to constants or integers. */
439 typedef const void * const_iptr_t;
441 typedef unsigned char sigbit_t; /*!< Type for signal bits. */
442 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
443 typedef unsigned char page_t; /*!< Type for banked memory pages. */
447 * \name Standard type definitions.
449 * These should be in <sys/types.h> or <stddef.h>, but many compilers
450 * and C libraries lack them.
452 * We check for some common definitions to avoid redefinitions:
454 * glibc, avr-libc: _SIZE_T_DEFINED, __ssize_t_defined
455 * Darwin libc: _BSD_SIZE_T_DEFINED_, _SIZE_T
460 #if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_) \
463 /* 32bit or 64bit (32bit for _WIN64). */
464 typedef unsigned long size_t;
470 #if !(defined(ssize_t) || defined(_SSIZE_T) || defined(__ssize_t_defined))
472 /* 32bit or 64bit (32bit for _WIN64). */
473 typedef long ssize_t;
477 /* 16bit (missing in avr-libc's sys/types.h). */
487 * \name Types for hardware registers.
489 * Only use these types for registers whose contents can
490 * be changed asynchronously by external hardware.
495 /* Registers can be accessed only through 16-bit pointers */
496 typedef volatile uint16_t reg16_t;
498 typedef volatile uint8_t reg8_t;
499 typedef volatile uint16_t reg16_t;
500 typedef volatile uint32_t reg32_t;
505 /* Quasi-ANSI macros */
508 * Return the byte offset of the member \a m in struct \a s.
510 * \note This macro should be defined in "stddef.h" and is sometimes
511 * compiler-specific (g++ has a builtin for it).
513 #define offsetof(s,m) (size_t)&(((s *)0)->m)
517 * Count the number of elements in the static array \a a.
519 * \note This macro is non-standard, but implements a very common idiom
521 #define countof(a) (sizeof(a) / sizeof(*(a)))
525 * Cast a member of a structure out to the containing structure.
527 * \param ptr the pointer to the member.
528 * \param type the type of the container struct this is embedded in.
529 * \param member the name of the member within the struct.
531 #if COMPILER_TYPEOF && COMPILER_STATEMENT_EXPRESSIONS
532 #define containerof(ptr, type, member) ({ \
533 const typeof( ((type *)0)->member ) *_mptr = (ptr); /* type check */ \
534 (type *)((char *)_mptr - offsetof(type, member)); \
537 #define containerof(ptr, type, member) \
538 ( (type *)((char *)(ptr) - offsetof(type, member)) )
541 /*! Issue a compilation error if the \a condition is false */
542 #define STATIC_ASSERT(condition) \
543 UNUSED_VAR(extern char, STATIC_ASSERTION_FAILED__[(condition) ? 1 : -1])
545 #ifndef ASSERT_TYPE_EQUAL
546 /*! Ensure two variables have the same type. */
547 #define ASSERT_TYPE_EQUAL(var1, var2) \
548 do { (void)(&(var1) == &(var2)); } while(0)
551 #ifndef ASSERT_TYPE_IS
552 /** Ensure variable is of specified type. */
553 #define ASSERT_TYPE_IS(var, type) \
554 do { (void)(&(var) == (type *)0); } while(0)
557 #endif /* DEVLIB_COMPILER_H */