62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @addtogroup core_internal
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* @{
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*
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* @file attributes.h
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* @brief Compiler attributes/pragmas configuration
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics
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* @author René Kijewski <rene.kijewski@fu-berlin.de>
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*/
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#ifndef ATTRIBUTES_H_
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#define ATTRIBUTES_H_
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/**
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* @def NORETURN
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* @brief The *NORETURN* keyword tells the compiler to assume that the function
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* cannot return.
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*/
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#ifdef __GNUC__
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#define NORETURN __attribute__((noreturn))
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#else
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#define NORETURN
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#endif
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/**
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* @def CONST
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* @brief A function declared as *CONST* is #PURE and also not allowed to
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* examine global memory. I.e. a *CONST* function cannot even
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* dereference a pointer parameter.
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*/
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#ifdef __GNUC__
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#define CONST __attribute__((const))
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#else
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#define CONST
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#endif
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/**
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* @def PURE
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* @brief The function has no effects except the return value and its return
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* value depends only on the parameters and/or global variables. Such a
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* function can be subject to common subexpression elimination and loop
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* optimization just as an arithmetic operator would be.
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*/
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#ifdef __GNUC__
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#define PURE __attribute__((pure))
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#else
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#define PURE
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#endif
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#endif /* ATTRIBUTES_H_ */
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/** @} */
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