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 1.1 2005/04/11 19:04:13 bernie
18 *#* Move top-level headers to cfg/ subdir.
20 *#* Revision 1.44 2005/03/29 06:39:59 bernie
21 *#* setjmp.h, time_t: Remove ancient retrocompatibility; Remove MSVC double to float hack.
23 *#* Revision 1.43 2005/03/01 23:15:12 bernie
24 *#* Remove compatibility hack.
26 *#* Revision 1.42 2005/02/16 20:28:46 bernie
27 *#* Move PGM macros to mware/pgm.h
29 *#* Revision 1.41 2005/01/22 04:19:22 bernie
30 *#* MTIME_INFINITE: New constant.
32 *#* Revision 1.40 2005/01/20 18:46:04 aleph
33 *#* Add progmem datatypes; PSTR() definition.
35 #ifndef DEVLIB_COMPILER_H
36 #define DEVLIB_COMPILER_H
38 #include "cpu_detect.h"
41 #if defined __GNUC__ && defined __GNUC_MINOR__
42 #define GNUC_PREREQ(maj, min) \
43 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
45 #define GNUC_PREREQ(maj, min) 0
48 /* Some CW versions do not allow enabling C99 from the settings panel. */
49 #if defined(__MWERKS__)
53 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
54 #define COMPILER_C99 1
56 #define COMPILER_C99 0
60 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
61 #define PP_CAT(x,y) PP_CAT__(x,y)
62 #define PP_CAT__(x,y) x ## y
63 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
64 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
65 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
67 /*! String-ize a token (allowing macros to expand) */
68 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
69 #define PP_STRINGIZE__(x) #x
72 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
73 #pragma language=extended
74 #define INTERRUPT(x) interrupt [x]
75 #define REGISTER shortad
76 #define INLINE /* unsupported */
79 * Imported from <longjmp.h>. Unfortunately, we can't just include
80 * this header because it typedefs jmp_buf to be an array of chars.
81 * This would allow the compiler to place the buffer on an odd address.
82 * The CPU _should_ be able to perform word accesses to
83 * unaligned data, but there are *BUGS* in the 80196KC with
84 * some combinations of opcodes and addressing modes. One of
85 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
86 * provided by the IAR compiler ANSI C library. When ?GR contains
87 * an odd address, surprisingly the CPU will copy the high order
88 * byte of the source operand (SP) in the low order byte of the
89 * destination operand (the memory location pointed to by ?GR).
91 * We also need to replace the library setjmp()/longjmp() with
92 * our own versions because the IAR implementation "forgets" to
93 * save the contents of local registers (?LR).
97 void *sp; /* Stack pointer */
98 void *return_addr; /* Return address */
99 int lr[6]; /* 6 local registers */
102 typedef struct _JMP_BUF jmp_buf[1];
104 int setjmp(jmp_buf env);
105 void longjmp(jmp_buf env, int val);
107 /* Fake bool support */
110 typedef unsigned char bool;
112 #elif defined(_MSC_VER) /* Win32 emulation support */
114 /* MSVC doesn't provide <stdbool.h>. */
119 #endif /* !__cplusplus */
121 /* These C99 functions are oddly named in MSVCRT32.lib */
122 #define snprintf _snprintf
123 #define vsnprintf _vsnprintf
125 #elif defined(__GNUC__)
127 /* Compiler features */
128 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
129 #define COMPILER_TYPEOF 1
130 #define COMPILER_STATEMENT_EXPRESSIONS 1
133 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
134 #define NORETURN __attribute__((__noreturn__))
135 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
136 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
137 #define USED_VAR(type,name) __attribute__((__used__)) type name
138 #define INLINE static inline __attribute__((__always_inline__))
139 #define LIKELY(x) __builtin_expect(!!(x), 1)
140 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
141 #define PURE_FUNC __attribute__((pure))
142 #define CONST_FUNC __attribute__((const))
143 #define UNUSED_FUNC __attribute__((unused))
144 #define USED_FUNC __attribute__((__used__))
145 #define RESTRICT __restrict__
146 #define MUST_CHECK __attribute__((warn_unused_result))
148 #define DEPRECATED __attribute__((__deprecated__))
155 /* 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__
184 // CodeWarrior has size_t as built-in type, but does not define this symbol.
185 #define _SIZE_T_DEFINED
188 #error unknown compiler
192 /* Defaults for compiler extensions. */
195 * \def COMPILER_VARIADIC_MACROS
196 * Support for macros with variable arguments.
198 #ifndef COMPILER_VARIADIC_MACROS
199 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
203 * \def COMPILER_TYPEOF
204 * Support for macros with variable arguments.
206 #ifndef COMPILER_TYPEOF
207 #define COMPILER_TYPEOF 0
211 * \def COMPILER_STATEMENT_EXPRESSIONS
212 * Support for macros with variable arguments.
214 #ifndef COMPILER_STATEMENT_EXPRESSIONS
215 #define COMPILER_STATEMENT_EXPRESSIONS 0
218 /* A few defaults for missing compiler features. */
220 #define INLINE static inline
223 #define NORETURN /* nothing */
226 #define FORMAT(type,fmt,first) /* nothing */
229 #define DEPRECATED /* nothing */
232 #define UNUSED_ARG(type,arg) type arg
234 #define UNUSED UNUSED_ARG /* OBSOLETE */
236 #define UNUSED_VAR(type,name) type name
239 #define USED_VAR(type,name) type name
242 #define REGISTER /* nothing */
245 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
251 #define UNLIKELY(x) x
254 #define PURE_FUNC /* nothing */
257 #define CONST_FUNC /* nothing */
260 #define UNUSED_FUNC /* nothing */
263 #define USED_FUNC /* nothing */
266 #define RESTRICT /* nothing */
269 #define MUST_CHECK /* nothing */
272 /* Misc definitions */
274 #define NULL (void *)0
281 /* Support for hybrid C/C++ applications. */
283 #define EXTERN_C extern "C"
284 #define EXTERN_C_BEGIN extern "C" {
285 #define EXTERN_C_END }
287 #define EXTERN_C extern
288 #define EXTERN_C_BEGIN /* nothing */
289 #define EXTERN_C_END /* nothing */
293 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
295 * \name ISO C99 fixed-size types
297 * These should be in <stdint.h>, but many compilers lack them.
300 typedef signed char int8_t;
301 typedef short int int16_t;
302 typedef long int int32_t;
303 typedef unsigned char uint8_t;
304 typedef unsigned short int uint16_t;
305 typedef unsigned long int uint32_t;
307 #elif defined(__GNUC__) && CPU_AVR
308 /* avr-libc is weird... */
309 #include <inttypes.h>
311 /* This is the correct location. */
317 * The ATmega8 has a very small Flash, so we can't afford
318 * to link in support routines for 32bit integer arithmetic.
320 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
321 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
322 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
323 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
324 #define MTIME_INFINITE 0x7FFFL
326 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
327 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
328 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
329 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
330 #define MTIME_INFINITE 0x7FFFFFFFL
333 /*! Bulk storage large enough for both pointers or integers. */
334 typedef void * iptr_t;
335 typedef const void * const_iptr_t;
337 typedef unsigned char sig_t; /*!< Type for signal bits. */
338 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
339 typedef unsigned char page_t; /*!< Type for banked memory pages. */
343 * \name Standard type definitions.
345 * These should be in <sys/types.h> or <stddef.h>, but many compilers
346 * and C libraries lack them.
348 * We check for some common definitions to avoid redefinitions:
350 * glibc, avr-libc: _SIZE_T_DEFINED
351 * Darwin libc: _BSD_SIZE_T_DEFINED_
355 #if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_))
356 #if CPU_REG_BITS > 32
358 typedef unsigned long size_t;
359 typedef long ssize_t;
361 /* 32bit or 16bit. */
362 typedef unsigned int size_t;
370 * \name Types for hardware registers.
372 * Only use these types for registers whose contents can
373 * be changed asynchronously by external hardware.
378 /* Registers can be accessed only through 16-bit pointers */
379 typedef volatile uint16_t reg16_t;
381 typedef volatile uint8_t reg8_t;
382 typedef volatile uint16_t reg16_t;
383 typedef volatile uint32_t reg32_t;
388 /* Quasi-ANSI macros */
391 * Return the byte offset of the member \a m in struct \a s.
393 * \note This macro should be defined in "stddef.h" and is sometimes
394 * compiler-specific (g++ has a builtin for it).
396 #define offsetof(s,m) (size_t)&(((s *)0)->m)
400 * Count the number of elements in the static array \a a.
402 * \note This macro is non-standard, but implements a very common idiom
404 #define countof(a) (sizeof(a) / sizeof(*(a)))
407 /*! Issue a compilation error if the \a condition is false */
408 #define STATIC_ASSERT(condition) \
409 UNUSED_VAR(extern char,PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1])
411 #endif /* DEVLIB_COMPILER_H */