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OpenModem/bertos/cfg/compiler.h

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/**
* \file
* <!--
* This file is part of BeRTOS.
*
* Bertos is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As a special exception, you may use this file as part of a free software
* library without restriction. Specifically, if other files instantiate
* templates or use macros or inline functions from this file, or you compile
* this file and link it with other files to produce an executable, this
* file does not by itself cause the resulting executable to be covered by
* the GNU General Public License. This exception does not however
* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
* Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
* Copyright 2001, 2002, 2003 Bernie Innocenti <bernie@codewiz.org>
*
* -->
*
* \brief Additional support macros for compiler independance
*
* \author Bernie Innocenti <bernie@codewiz.org>
*/
#ifndef BERTOS_COMPILER_H
#define BERTOS_COMPILER_H
#include <cpu/detect.h>
#if defined __GNUC__ && defined __GNUC_MINOR__
#define GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
#define GNUC_PREREQ(maj, min) 0
#endif
/* Some CW versions do not allow enabling C99 from the settings panel. */
#if defined(__MWERKS__)
#pragma c99 on
#endif
#if defined(__STDC_VERSION__)
#if (__STDC_VERSION__ == 199409L) // IAR
#define COMPILER_C99 1 // not true, because partial C99, avoid miscompilation
#elif (__STDC_VERSION__ >= 199901L) // GCC
#define COMPILER_C99 1
#else
#define COMPILER_C99 0
#endif
#endif
/** Concatenate two different preprocessor tokens (allowing macros to expand) */
#define PP_CAT(x,y) PP_CAT__(x,y)
#define PP_CAT__(x,y) x ## y
#define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
#define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
#define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
/** String-ize a token (allowing macros to expand) */
#define PP_STRINGIZE(x) PP_STRINGIZE__(x)
#define PP_STRINGIZE__(x) #x
/**
*/
#if COMPILER_C99
#define COUNT_PARMS2(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _, ...) _
#define COUNT_PARMS(...) \
COUNT_PARMS2(11 , ## __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
/**
* usage:
* \code
* #define foo_init(...) PP_CAT(foo_init_, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
* \endcode
*/
#else
#define COUNT_PARMS2(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _, ...) _
#define COUNT_PARMS(args...) \
COUNT_PARMS2(11 , ## args, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
/**
* usage:
* \code
* #define foo_init(args...) PP_CAT(foo_init_, COUNT_PARMS(args)) (args)
* \endcode
*/
#endif
#if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
#pragma language=extended
/* IAR iccarm specific functions */
#include <intrinsics.h>
#pragma diag_suppress=Pe940
#pragma inline = forced
#define MEMORY_BARRIER asm("")
#if CPU_ARM || CPU_CM3
#define COMPILER_VARIADIC_MACROS 1
#define INTERRUPT(x) __irq __arm void x (void)
#define INLINE static inline
#define NAKED
/* Include some standard C89/C99 stuff */
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#elif CPU_I196
// IAR has size_t as built-in type, but does not define this symbol.
#define _SIZE_T_DEFINED
#define INTERRUPT(x) interrupt [x]
#define REGISTER shortad
#define INLINE /* unsupported */
/*
* Imported from <longjmp.h>. Unfortunately, we can't just include
* this header because it typedefs jmp_buf to be an array of chars.
* This would allow the compiler to place the buffer on an odd address.
* The CPU _should_ be able to perform word accesses to
* unaligned data, but there are *BUGS* in the 80196KC with
* some combinations of opcodes and addressing modes. One of
* these, "ST SP,[?GR]+" is used in the longjmp() implementation
* provided by the IAR compiler ANSI C library. When ?GR contains
* an odd address, surprisingly the CPU will copy the high order
* byte of the source operand (SP) in the low order byte of the
* destination operand (the memory location pointed to by ?GR).
*
* We also need to replace the library setjmp()/longjmp() with
* our own versions because the IAR implementation "forgets" to
* save the contents of local registers (?LR).
*/
struct _JMP_BUF
{
void *sp; /* Stack pointer */
void *return_addr; /* Return address */
int lr[6]; /* 6 local registers */
};
typedef struct _JMP_BUF jmp_buf[1];
int setjmp(jmp_buf env);
void longjmp(jmp_buf env, int val);
/* Fake bool support */
#define true (1==1)
#define false (1!=1)
typedef unsigned char bool;
#else
#error Unsupported CPU
#endif
#elif defined(_MSC_VER) /* Win32 emulation support */
/* MSVC doesn't provide <stdbool.h>. */
#ifndef __cplusplus
#define true (1==1)
#define false (1!=1)
typedef int bool;
#endif /* !__cplusplus */
/* These C99 functions are oddly named in MSVCRT32.lib */
#define snprintf _snprintf
#define vsnprintf _vsnprintf
/* MSVC doesn't support C99's __func__, but has a similar extension. */
#define __func__ __FUNCTION__
/* MSVC doesn't support C99's inline keyword */
#ifndef __cplusplus
#define INLINE __inline
#endif
#elif defined(__GNUC__)
/* Compiler features */
#define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
#define COMPILER_TYPEOF 1
#define COMPILER_STATEMENT_EXPRESSIONS 1
/* GCC attributes */
#define FORMAT(type,fmt,first) __attribute__((__format__(type, fmt, first)))
#define NORETURN __attribute__((__noreturn__))
#define UNUSED_ARG(type,arg) __attribute__((__unused__)) type arg
#define UNUSED_VAR(type,name) __attribute__((__unused__)) type name
#define USED_VAR(type,name) __attribute__((__used__)) type name
#define INLINE static inline __attribute__((__always_inline__))
#define NOINLINE __attribute__((noinline))
#define LIKELY(x) __builtin_expect(!!(x), 1)
#define UNLIKELY(x) __builtin_expect(!!(x), 0)
#define PURE_FUNC __attribute__((pure))
#define CONST_FUNC __attribute__((const))
#define UNUSED_FUNC __attribute__((unused))
#define USED_FUNC __attribute__((__used__))
#define RESTRICT __restrict__
#define MUST_CHECK __attribute__((warn_unused_result))
#define PACKED __attribute__((packed))
#define ALIGNED(x) __attribute__ ((__aligned__(x)))
#if CPU_ARM | CPU_CM3
#define NAKED __attribute__((naked))
#else
#define NAKED
#endif
/**
* Force compiler to reload context variable.
*/
#define MEMORY_BARRIER asm volatile ("" : : : "memory")
#if GNUC_PREREQ(3,1)
#define DEPRECATED __attribute__((__deprecated__))
#endif
#if GNUC_PREREQ(4,5)
#define UNREACHABLE() __builtin_unreachable()
#endif
#ifndef __cplusplus
#define ASSERT_TYPE_EQUAL(var1, var2) \
STATIC_ASSERT(__builtin_types_compatible_p(typeof(var1), typeof(var2)))
#define ASSERT_TYPE_IS(var, type) \
STATIC_ASSERT(__builtin_types_compatible_p(typeof(var), type))
#endif
/* Include some standard C89/C99 stuff */
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#if !CPU_AVR
#include <sys/types.h> /* for ssize_t */
#endif
#ifndef __cplusplus
/*
* Disallow some C++ keywords as identifiers in C programs,
* for improved portability.
*/
#pragma GCC poison new delete class template typename
#pragma GCC poison private protected public operator
#pragma GCC poison friend mutable using namespace
#pragma GCC poison cin cout cerr clog
#endif
#elif defined(__MWERKS__)
/* Compiler features */
#define COMPILER_VARIADIC_MACROS 1
#define COMPILER_TYPEOF 1
#define COMPILER_STATEMENT_EXPRESSIONS 1
#define typeof __typeof__
#define UNUSED_ARG(type,arg) type
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
// CodeWarrior has size_t as built-in type, but does not define this symbol.
#define _SIZE_T_DEFINED
#else
#error unknown compiler
#endif
/* Defaults for compiler extensions. */
/**
* \def COMPILER_VARIADIC_MACROS
* Support for macros with variable arguments.
*/
#ifndef COMPILER_VARIADIC_MACROS
#define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
#endif
/**
* \def COMPILER_TYPEOF
* Support for dynamic type identification.
*/
#ifndef COMPILER_TYPEOF
#define COMPILER_TYPEOF 0
#endif
/**
* \def COMPILER_STATEMENT_EXPRESSIONS
* Support for statement expressions.
*/
#ifndef COMPILER_STATEMENT_EXPRESSIONS
#define COMPILER_STATEMENT_EXPRESSIONS 0
#endif
/* A few defaults for missing compiler features. */
#ifndef INLINE
#define INLINE static inline
#endif
#ifndef NOINLINE
#define NOINLINE /* nothing */
#endif
#ifndef NORETURN
#define NORETURN /* nothing */
#endif
#ifndef FORMAT
#define FORMAT(type,fmt,first) /* nothing */
#endif
#ifndef DEPRECATED
#define DEPRECATED /* nothing */
#endif
#ifndef UNUSED_ARG
#define UNUSED_ARG(type,arg) type arg
#endif
#ifndef UNUSED_VAR
#define UNUSED_VAR(type,name) type name
#endif
#ifndef USED_VAR
#define USED_VAR(type,name) type name
#endif
#ifndef REGISTER
#define REGISTER /* nothing */
#endif
#ifndef LIKELY
#define LIKELY(x) x
#endif
#ifndef UNLIKELY
#define UNLIKELY(x) x
#endif
#ifndef PURE_FUNC
#define PURE_FUNC /* nothing */
#endif
#ifndef CONST_FUNC
#define CONST_FUNC /* nothing */
#endif
#ifndef UNUSED_FUNC
#define UNUSED_FUNC /* nothing */
#endif
#ifndef USED_FUNC
#define USED_FUNC /* nothing */
#endif
#ifndef RESTRICT
#define RESTRICT /* nothing */
#endif
#ifndef MUST_CHECK
#define MUST_CHECK /* nothing */
#endif
#ifndef PACKED
#define PACKED /* nothing */
#endif
#ifndef ALIGNED
#define ALIGNED /* nothing */
#endif
#ifndef MEMORY_BARRIER
#define MEMORY_BARRIER /* nothing */
#warning No memory barrier defined for select compiler. If you use the kernel check it.
#endif
#ifndef UNREACHABLE
#define UNREACHABLE() for (;;)
#endif
/* Misc definitions */
#ifndef NULL
#define NULL (void *)0
#endif
#ifndef EOF
#define EOF (-1)
#endif
/* Support for hybrid C/C++ applications. */
#ifdef __cplusplus
#define EXTERN_C extern "C"
#define EXTERN_C_BEGIN extern "C" {
#define EXTERN_C_END }
#define EXTERN_CONST extern const
#define CONST_CAST(TYPE,EXPR) (const_cast<TYPE>(EXPR))
#else
#define EXTERN_C extern
#define EXTERN_C_BEGIN /* nothing */
#define EXTERN_C_END /* nothing */
#define EXTERN_CONST const
#define CONST_CAST(TYPE,EXPR) ((TYPE)(EXPR)) /* FIXME: How can we suppress the warning in C? */
#endif
#if defined(_MSC_VER) \
|| ((defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)) && CPU_I196)
/**
* \name ISO C99 fixed-size types
*
* These should be in <stdint.h>, but a few compilers lack them.
* \{
*/
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef short int int16_t;
typedef unsigned short int uint16_t;
typedef long int int32_t; /* _WIN64 safe */
typedef unsigned long int uint32_t; /* _WIN64 safe */
#ifdef _MSC_VER
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
#else
typedef long long int64_t;
typedef unsigned long long uint64_t;
#endif
/* \} */
#else
/* This is the standard location. */
#include <stdint.h>
#endif
#if CPU_AVR_ATMEGA8
/*
* The ATmega8 has a very small Flash, so we can't afford
* to link in support routines for 32bit integer arithmetic.
*/
typedef int16_t ticks_t; /**< Type for time expressed in ticks. */
typedef int16_t mtime_t; /**< Type for time expressed in milliseconds. */
typedef int16_t utime_t; /**< Type for time expressed in microseconds. */
#define SIZEOF_MTIME_T (16 / CPU_BITS_PER_CHAR)
#define SIZEOF_UTIME_T (16 / CPU_BITS_PER_CHAR)
#define MTIME_INFINITE 0x7FFFL
#else
typedef int32_t ticks_t; /**< Type for time expressed in ticks. */
typedef int32_t utime_t; /**< Type for time expressed in microseconds. */
#define SIZEOF_UTIME_T (32 / CPU_BITS_PER_CHAR)
#ifndef DEVLIB_MTIME_DEFINED
#define DEVLIB_MTIME_DEFINED 1 /* Resolve conflict with <os/hptime.h> */
typedef int32_t mtime_t; /**< Type for time expressed in milliseconds. */
#define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
#define MTIME_INFINITE 0x7FFFFFFFL
#endif
#endif
/** User defined callback type */
typedef void (*Hook)(void *);
/** Bulk storage large enough for both pointers or integers. */
typedef void * iptr_t;
/** Bulk storage large enough for both pointers to constants or integers. */
typedef const void * const_iptr_t;
typedef unsigned char sigbit_t; /**< Type for signal bits. */
typedef unsigned char sigmask_t; /**< Type for signal masks. */
/**
* Signal structure
*/
typedef struct Signal
{
sigmask_t wait; /**< Signals the process is waiting for */
sigmask_t recv; /**< Received signals */
} Signal;
/**
* \name Standard type definitions.
*
* These should be in <sys/types.h> or <stddef.h>, but many compilers
* and C libraries lack them.
*
* We check for some common definitions to avoid redefinitions:
*
* glibc, avr-libc: _SIZE_T_DEFINED, __ssize_t_defined
* Darwin libc: _BSD_SIZE_T_DEFINED_, _SIZE_T
* IAR ARM: _SIZE_T
*
* \{
*/
#if !(defined(size_t) || defined(_SIZE_T_DEFINED) || defined(_BSD_SIZE_T_DEFINED_) \
|| defined(_SIZE_T))
#if CPU_X86
/* 32bit or 64bit (32bit for _WIN64). */
typedef unsigned long size_t;
#else
#error Unknown CPU
#endif
#endif
#if !(defined(ssize_t) || defined(_SSIZE_T) || defined(__ssize_t_defined))
#if CPU_X86
/* 32bit or 64bit (32bit for _WIN64). */
typedef long ssize_t;
#elif CPU_ARM || CPU_CM3
typedef int ssize_t;
#elif CPU_AVR || CPU_MSP430
/* 16bit (missing in avr-/msp430-libc's sys/types.h). */
typedef int ssize_t;
#else
#error Unknown CPU
#endif
#endif
/*\}*/
/**
* \name Types for hardware registers.
*
* Only use these types for registers whose contents can
* be changed asynchronously by external hardware.
*
* \{
*/
#if CPU_DSP56K
/* Registers can be accessed only through 16-bit pointers */
typedef volatile uint16_t reg16_t;
#else
typedef volatile uint8_t reg8_t;
typedef volatile uint16_t reg16_t;
typedef volatile uint32_t reg32_t;
#endif
/*\}*/
/* Quasi-ANSI macros */
#ifndef offsetof
/**
* Return the byte offset of the member \a m in struct \a s.
*
* \note This macro should be defined in "stddef.h" and is sometimes
* compiler-specific (g++ has a builtin for it).
*/
#define offsetof(s,m) (size_t)&(((s *)0)->m)
#endif
#ifndef countof
/**
* Count the number of elements in the static array \a a.
*
* \note This macro is non-standard, but implements a very common idiom
*/
#if defined(__GNUC__) && !defined(__cplusplus)
/*
* Perform a compile time type checking: countof() can only
* work with static arrays, so throw a compile time error if a
* pointer is passed as argument.
*
* NOTE: the construct __builtin_types_compatible_p() is only
* available for C.
*/
#define countof(a) (sizeof(a) / sizeof(*(a)) + \
STATIC_ASSERT_EXPR( \
!__builtin_types_compatible_p( \
typeof(a), typeof(&a[0]))))
#else
#define countof(a) (sizeof(a) / sizeof(*(a)))
#endif
#endif
#ifndef alignof
/**
* Return the alignment in memory of a generic data type.
*
* \note We need to worry about alignment when allocating memory that
* will be used later by unknown objects (e.g., malloc()) or, more
* generally, whenever creating generic container types.
*/
#define alignof(type) offsetof(struct { char c; type member; }, member)
#endif
/**
* Cast a member of a structure out to the containing structure.
*
* \param ptr the pointer to the member.
* \param type the type of the container struct this is embedded in.
* \param member the name of the member within the struct.
*/
#if COMPILER_TYPEOF && COMPILER_STATEMENT_EXPRESSIONS
#define containerof(ptr, type, member) ({ \
typeof( ((type *)0)->member ) *_mptr = (ptr); /* type check */ \
(type *)(void *)((char *)_mptr - offsetof(type, member)); \
})
#else
#define containerof(ptr, type, member) \
( (type *)(void *)((char *)(ptr) - offsetof(type, member)) )
#endif
/** Issue a compilation error if the \a condition is false */
#define STATIC_ASSERT(condition) \
UNUSED_VAR(extern char, STATIC_ASSERTION_FAILED__[(condition) ? 1 : -1])
/**
* Issue a compilation error if \a __cond is false (this can be used inside an
* expression).
*/
#define STATIC_ASSERT_EXPR(__cond) \
(sizeof(struct { int STATIC_ASSERTION_FAILED__:!!(__cond); }) * 0)
#ifndef ASSERT_TYPE_EQUAL
/** Ensure two variables have the same type. */
#define ASSERT_TYPE_EQUAL(var1, var2) \
do { (void)(&(var1) == &(var2)); } while(0)
#endif
#ifndef ASSERT_TYPE_IS
/** Ensure variable is of specified type. */
#define ASSERT_TYPE_IS(var, type) \
do { (void)(&(var) == (type *)0); } while(0)
#endif
/**
* Prevent the compiler from optimizing access to the variable \a x, enforcing
* a refetch from memory. This also forbid from reordering successing instances
* of ACCESS_SAFE().
*/
#ifdef __ICCARM__
#define ACCESS_SAFE(x) x
#else
#define ACCESS_SAFE(x) (*(volatile typeof(x) *)&(x))
#endif
#endif /* BERTOS_COMPILER_H */
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