compiler.h

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#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__) && (__STDC_VERSION__ >= 199901L)
    #define COMPILER_C99      1
#else
    #define COMPILER_C99      0
#endif


#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)

#define PP_STRINGIZE(x)     PP_STRINGIZE__(x)
#define PP_STRINGIZE__(x)   #x


#if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)

    #pragma language=extended

    #if CPU_ARM

        #define COMPILER_VARIADIC_MACROS 1

        #define INTERRUPT(x)  __irq __arm void x (void)
        #define INLINE        static inline

        /* 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 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 MEMORY_BARRIER           asm volatile ("" : : : "memory")

    #if GNUC_PREREQ(3,1)
        #define DEPRECATED  __attribute__((__deprecated__))
    #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. */

#ifndef COMPILER_VARIADIC_MACROS
#define COMPILER_VARIADIC_MACROS (COMPILER_C99 != 0)
#endif

#ifndef COMPILER_TYPEOF
#define COMPILER_TYPEOF 0
#endif

#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 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
#define UNUSED                 UNUSED_ARG /* OBSOLETE */
#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 MEMORY_BARRIER
#define MEMORY_BARRIER         /* nothing */
#warning No memory barrier defined for select compiler. If you use the kernel check it.
#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)

    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;  
    typedef int16_t mtime_t;  
    typedef int16_t utime_t;  
    #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;  
    typedef int32_t utime_t;  
    #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;  
        #define SIZEOF_MTIME_T (32 / CPU_BITS_PER_CHAR)
        #define MTIME_INFINITE 0x7FFFFFFFL
    #endif
#endif

typedef void * iptr_t;

typedef const void * const_iptr_t;

typedef unsigned char sigbit_t;  
typedef unsigned char sigmask_t; 
typedef unsigned char page_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
        typedef int ssize_t;
    #elif CPU_AVR
        /* 16bit (missing in avr-libc's sys/types.h). */
        typedef int ssize_t;
    #else
        #error Unknown CPU
    #endif
#endif
/*\}*/


#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

    #define offsetof(s,m)  (size_t)&(((s *)0)->m)
#endif
#ifndef countof

    #define countof(a)  (sizeof(a) / sizeof(*(a)))
#endif

#if COMPILER_TYPEOF && COMPILER_STATEMENT_EXPRESSIONS
    #define containerof(ptr, type, member) ({ \
        const typeof( ((type *)0)->member ) *_mptr = (ptr); /* type check */ \
        (type *)((char *)_mptr - offsetof(type, member)); \
    })
#else
    #define containerof(ptr, type, member) \
        ( (type *)((char *)(ptr) - offsetof(type, member)) )
#endif

#define STATIC_ASSERT(condition)  \
    UNUSED_VAR(extern char, STATIC_ASSERTION_FAILED__[(condition) ? 1 : -1])

#ifndef ASSERT_TYPE_EQUAL

    #define ASSERT_TYPE_EQUAL(var1, var2)  \
            do { (void)(&(var1) == &(var2)); } while(0)
#endif

#ifndef ASSERT_TYPE_IS

    #define ASSERT_TYPE_IS(var, type)  \
            do { (void)(&(var) == (type *)0); } while(0)
#endif

#endif /* BERTOS_COMPILER_H */