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 1.44 2005/03/29 06:39:59 bernie
18 *#* setjmp.h, time_t: Remove ancient retrocompatibility; Remove MSVC double to float hack.
20 *#* Revision 1.43 2005/03/01 23:15:12 bernie
21 *#* Remove compatibility hack.
23 *#* Revision 1.42 2005/02/16 20:28:46 bernie
24 *#* Move PGM macros to mware/pgm.h
26 *#* Revision 1.41 2005/01/22 04:19:22 bernie
27 *#* MTIME_INFINITE: New constant.
29 *#* Revision 1.40 2005/01/20 18:46:04 aleph
30 *#* Add progmem datatypes; PSTR() definition.
32 #ifndef DEVLIB_COMPILER_H
33 #define DEVLIB_COMPILER_H
35 #include "cpu_detect.h"
38 #if defined __GNUC__ && defined __GNUC_MINOR__
39 #define GNUC_PREREQ(maj, min) \
40 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
42 #define GNUC_PREREQ(maj, min) 0
45 /* Some CW versions do not allow enabling C99 from the settings panel. */
46 #if defined(__MWERKS__)
50 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
51 #define COMPILER_C99 1
53 #define COMPILER_C99 0
57 /*! Concatenate two different preprocessor tokens (allowing macros to expand) */
58 #define PP_CAT(x,y) PP_CAT__(x,y)
59 #define PP_CAT__(x,y) x ## y
60 #define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
61 #define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
62 #define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
64 /*! String-ize a token (allowing macros to expand) */
65 #define PP_STRINGIZE(x) PP_STRINGIZE__(x)
66 #define PP_STRINGIZE__(x) #x
69 #if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
70 #pragma language=extended
71 #define INTERRUPT(x) interrupt [x]
72 #define REGISTER shortad
73 #define INLINE /* unsupported */
76 * Imported from <longjmp.h>. Unfortunately, we can't just include
77 * this header because it typedefs jmp_buf to be an array of chars.
78 * This would allow the compiler to place the buffer on an odd address.
79 * The CPU _should_ be able to perform word accesses to
80 * unaligned data, but there are *BUGS* in the 80196KC with
81 * some combinations of opcodes and addressing modes. One of
82 * these, "ST SP,[?GR]+" is used in the longjmp() implementation
83 * provided by the IAR compiler ANSI C library. When ?GR contains
84 * an odd address, surprisingly the CPU will copy the high order
85 * byte of the source operand (SP) in the low order byte of the
86 * destination operand (the memory location pointed to by ?GR).
88 * We also need to replace the library setjmp()/longjmp() with
89 * our own versions because the IAR implementation "forgets" to
90 * save the contents of local registers (?LR).
94 void *sp; /* Stack pointer */
95 void *return_addr; /* Return address */
96 int lr[6]; /* 6 local registers */
99 typedef struct _JMP_BUF jmp_buf[1];
101 int setjmp(jmp_buf env);
102 void longjmp(jmp_buf env, int val);
104 /* Fake bool support */
107 typedef unsigned char bool;
109 #elif defined(_MSC_VER) /* Win32 emulation support */
111 /* MSVC doesn't provide <stdbool.h>. */
116 #endif /* !__cplusplus */
118 /* These C99 functions are oddly named in MSVCRT32.lib */
119 #define snprintf _snprintf
120 #define vsnprintf _vsnprintf
122 #elif defined(__GNUC__)
124 /* Compiler features */
125 #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
126 #define COMPILER_TYPEOF 1
127 #define COMPILER_STATEMENT_EXPRESSIONS 1
130 #define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
131 #define NORETURN __attribute__((__noreturn__))
132 #define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
133 #define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
134 #define USED_VAR(type,name) __attribute__((__used__)) type name
135 #define INLINE static inline __attribute__((__always_inline__))
136 #define LIKELY(x) __builtin_expect(!!(x), 1)
137 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
138 #define PURE_FUNC __attribute__((pure))
139 #define CONST_FUNC __attribute__((const))
140 #define UNUSED_FUNC __attribute__((unused))
141 #define USED_FUNC __attribute__((__used__))
142 #define RESTRICT __restrict__
143 #define MUST_CHECK __attribute__((warn_unused_result))
145 #define DEPRECATED __attribute__((__deprecated__))
152 /* Include some standard C89/C99 stuff */
159 * Disallow some C++ keywords as identifiers in C programs,
160 * for improved portability.
162 #pragma GCC poison new delete class template typename
163 #pragma GCC poison private protected public operator
164 #pragma GCC poison friend mutable using namespace
165 #pragma GCC poison cin cout cerr clog
168 #elif defined(__MWERKS__) && CPU_DSP56K
170 /* Compiler features */
171 #define COMPILER_VARIADIC_MACROS 1
172 #define COMPILER_TYPEOF 1
173 #define COMPILER_STATEMENT_EXPRESSIONS 1
175 #define typeof __typeof__
181 // CodeWarrior has size_t as built-in type, but does not define this symbol.
182 #define _SIZE_T_DEFINED
185 #error unknown compiler
189 /* Defaults for compiler extensions. */
192 * \def COMPILER_VARIADIC_MACROS
193 * Support for macros with variable arguments.
195 #ifndef COMPILER_VARIADIC_MACROS
196 #define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
200 * \def COMPILER_TYPEOF
201 * Support for macros with variable arguments.
203 #ifndef COMPILER_TYPEOF
204 #define COMPILER_TYPEOF 0
208 * \def COMPILER_STATEMENT_EXPRESSIONS
209 * Support for macros with variable arguments.
211 #ifndef COMPILER_STATEMENT_EXPRESSIONS
212 #define COMPILER_STATEMENT_EXPRESSIONS 0
215 /* A few defaults for missing compiler features. */
217 #define INLINE static inline
220 #define NORETURN /* nothing */
223 #define FORMAT(type,fmt,first) /* nothing */
226 #define DEPRECATED /* nothing */
229 #define UNUSED_ARG(type,arg) type arg
231 #define UNUSED UNUSED_ARG /* OBSOLETE */
233 #define UNUSED_VAR(type,name) type name
236 #define USED_VAR(type,name) type name
239 #define REGISTER /* nothing */
242 #define INTERRUPT(x) ERROR_NOT_IMPLEMENTED
248 #define UNLIKELY(x) x
251 #define PURE_FUNC /* nothing */
254 #define CONST_FUNC /* nothing */
257 #define UNUSED_FUNC /* nothing */
260 #define USED_FUNC /* nothing */
263 #define RESTRICT /* nothing */
266 #define MUST_CHECK /* nothing */
269 /* Misc definitions */
271 #define NULL (void *)0
278 /* Support for hybrid C/C++ applications. */
280 #define EXTERN_C extern "C"
281 #define EXTERN_C_BEGIN extern "C" {
282 #define EXTERN_C_END }
284 #define EXTERN_C extern
285 #define EXTERN_C_BEGIN /* nothing */
286 #define EXTERN_C_END /* nothing */
290 #if (defined(_MSC_VER) || defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__))
292 * \name ISO C99 fixed-size types
294 * These should be in <stdint.h>, but many compilers lack them.
297 typedef signed char int8_t;
298 typedef short int int16_t;
299 typedef long int int32_t;
300 typedef unsigned char uint8_t;
301 typedef unsigned short int uint16_t;
302 typedef unsigned long int uint32_t;
304 #elif defined(__GNUC__) && CPU_AVR
305 /* avr-libc is weird... */
306 #include <inttypes.h>
308 /* This is the correct location. */
314 * The ATmega8 has a very small Flash, so we can't afford
315 * to link in support routines for 32bit integer arithmetic.
317 typedef int16_t mtime_t; /*!< Type for time expressed in milliseconds. */
318 typedef int16_t utime_t; /*!< Type for time expressed in microseconds. */
319 #define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
320 #define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
321 #define MTIME_INFINITE 0x7FFFL
323 typedef int32_t mtime_t; /*!< Type for time expressed in milliseconds. */
324 typedef int32_t utime_t; /*!< Type for time expressed in microseconds. */
325 #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
326 #define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
327 #define MTIME_INFINITE 0x7FFFFFFFL
330 /*! Bulk storage large enough for both pointers or integers. */
331 typedef void * iptr_t;
332 typedef const void * const_iptr_t;
334 typedef unsigned char sig_t; /*!< Type for signal bits. */
335 typedef unsigned char sigmask_t; /*!< Type for signal masks. */
336 typedef unsigned char page_t; /*!< Type for banked memory pages. */
340 * \name Standard type definitions.
342 * These should be in <sys/types.h> or <stddef.h>, but many compilers
343 * and C libraries lack them.
345 * We check for some common definitions to avoid redefinitions:
347 * glibc, avr-libc: _SIZE_T_DEFINED
348 * Darwin libc: _BSD_SIZE_T_DEFINED_
352 #if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_))
353 #if CPU_REG_BITS > 32
355 typedef unsigned long size_t;
356 typedef long ssize_t;
358 /* 32bit or 16bit. */
359 typedef unsigned int size_t;
367 * \name Types for hardware registers.
369 * Only use these types for registers whose contents can
370 * be changed asynchronously by external hardware.
375 /* Registers can be accessed only through 16-bit pointers */
376 typedef volatile uint16_t reg16_t;
378 typedef volatile uint8_t reg8_t;
379 typedef volatile uint16_t reg16_t;
380 typedef volatile uint32_t reg32_t;
385 /* Quasi-ANSI macros */
388 * Return the byte offset of the member \a m in struct \a s.
390 * \note This macro should be defined in "stddef.h" and is sometimes
391 * compiler-specific (g++ has a builtin for it).
393 #define offsetof(s,m) (size_t)&(((s *)0)->m)
397 * Count the number of elements in the static array \a a.
399 * \note This macro is non-standard, but implements a very common idiom
401 #define countof(a) (sizeof(a) / sizeof(*(a)))
404 /*! Issue a compilation error if the \a condition is false */
405 #define STATIC_ASSERT(condition) \
406 UNUSED_VAR(extern char,PP_CAT(CT_ASSERT___, __LINE__)[(condition) ? 1 : -1])
408 #endif /* DEVLIB_COMPILER_H */