166 lines
4.8 KiB
C
166 lines
4.8 KiB
C
/*
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* Copyright (c) 2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki desktop OS
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*
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*
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*/
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/**
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* \file
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* Default definitions of C compiler quirk work-arounds.
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* \author Adam Dunkels <adam@dunkels.com>
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*
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* This file is used for making use of extra functionality of some C
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* compilers used for Contiki, and defining work-arounds for various
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* quirks and problems with some other C compilers.
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*/
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#ifndef CC_H_
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#define CC_H_
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#include "contiki-conf.h"
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#include "sys/cc-gcc.h"
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/**
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* Configure if the C compiler supports the "register" keyword for
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* function arguments.
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*/
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#if CC_CONF_REGISTER_ARGS
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#define CC_REGISTER_ARG register
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#else /* CC_CONF_REGISTER_ARGS */
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#define CC_REGISTER_ARG
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#endif /* CC_CONF_REGISTER_ARGS */
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/**
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* Configure if the C compiler supports the arguments for function
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* pointers.
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*/
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#if CC_CONF_FUNCTION_POINTER_ARGS
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#define CC_FUNCTION_POINTER_ARGS 1
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#else /* CC_CONF_FUNCTION_POINTER_ARGS */
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#define CC_FUNCTION_POINTER_ARGS 0
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#endif /* CC_CONF_FUNCTION_POINTER_ARGS */
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/**
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* Configure if the C compiler have problems with const function pointers
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*/
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#ifdef CC_CONF_CONST_FUNCTION_BUG
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#define CC_CONST_FUNCTION
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#else /* CC_CONF_CONST_FUNCTION_BUG */
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#define CC_CONST_FUNCTION const
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#endif /* CC_CONF_CONST_FUNCTION_BUG */
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/**
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* Configure work-around for unsigned char bugs with sdcc.
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*/
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#if CC_CONF_UNSIGNED_CHAR_BUGS
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#define CC_UNSIGNED_CHAR_BUGS 1
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#else /* CC_CONF_UNSIGNED_CHAR_BUGS */
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#define CC_UNSIGNED_CHAR_BUGS 0
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#endif /* CC_CONF_UNSIGNED_CHAR_BUGS */
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/**
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* Configure if C compiler supports double hash marks in C macros.
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*/
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#if CC_CONF_DOUBLE_HASH
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#define CC_DOUBLE_HASH 1
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#else /* CC_CONF_DOUBLE_HASH */
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#define CC_DOUBLE_HASH 0
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#endif /* CC_CONF_DOUBLE_HASH */
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#ifdef CC_CONF_INLINE
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#define CC_INLINE CC_CONF_INLINE
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#else /* CC_CONF_INLINE */
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#define CC_INLINE
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#endif /* CC_CONF_INLINE */
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#ifdef CC_CONF_ALIGN
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#define CC_ALIGN(n) CC_CONF_ALIGN(n)
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#endif /* CC_CONF_INLINE */
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/**
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* Configure if the C compiler supports the assignment of struct value.
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*/
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#ifdef CC_CONF_ASSIGN_AGGREGATE
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#define CC_ASSIGN_AGGREGATE(dest, src) CC_CONF_ASSIGN_AGGREGATE(dest, src)
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#else /* CC_CONF_ASSIGN_AGGREGATE */
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#define CC_ASSIGN_AGGREGATE(dest, src) *dest = *src
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#endif /* CC_CONF_ASSIGN_AGGREGATE */
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#if CC_CONF_NO_VA_ARGS
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#define CC_NO_VA_ARGS CC_CONF_VA_ARGS
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#endif
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/** \def CC_ACCESS_NOW(x)
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* This macro ensures that the access to a non-volatile variable can
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* not be reordered or optimized by the compiler.
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* See also https://lwn.net/Articles/508991/ - In Linux the macro is
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* called ACCESS_ONCE
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* The type must be passed, because the typeof-operator is a gcc
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* extension
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*/
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#define CC_ACCESS_NOW(type, variable) (*(volatile type *)&(variable))
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#ifndef NULL
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#define NULL 0
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#endif /* NULL */
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#ifndef MAX
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#define MAX(n, m) (((n) < (m)) ? (m) : (n))
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#endif
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#ifndef MIN
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#define MIN(n, m) (((n) < (m)) ? (n) : (m))
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#endif
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#ifndef ABS
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#define ABS(n) (((n) < 0) ? -(n) : (n))
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#endif
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#define CC_CONCAT2(s1, s2) s1##s2
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/**
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* A C preprocessing macro for concatenating two preprocessor tokens.
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*
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* We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow
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* concatenation of two \#defined macros.
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*/
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#define CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)
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#define CC_CONCAT_EXT_2(s1, s2) CC_CONCAT2(s1, s2)
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/**
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* A C preprocessing macro for concatenating three preprocessor tokens.
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*/
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#define CC_CONCAT3(s1, s2, s3) s1##s2##s3
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#define CC_CONCAT_EXT_3(s1, s2, s3) CC_CONCAT3(s1, s2, s3)
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#endif /* CC_H_ */
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