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0c55703438
Use C11 standard _Noreturn instead of attributes (except, of course, MSVC) Remove unused helpers Avoid trapping in release builds, in favor of just unreachability Improve shim when __builtin_* are not available
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* This file is part of RGBDS.
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*
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* Copyright (c) 2014-2020, RGBDS contributors.
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*
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* SPDX-License-Identifier: MIT
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*/
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#ifndef HELPERS_H
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#define HELPERS_H
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// Of course, MSVC does not support C11, so no _Noreturn there...
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#ifdef _MSC_VER
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#define _Noreturn __declspec(noreturn)
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#endif
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// Ideally, we'd use `__has_attribute` and `__has_builtin`, but these were only introduced in GCC 9
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#ifdef __GNUC__ // GCC or compatible
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#define format_(archetype, str_index, first_arg) \
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__attribute__ ((format (archetype, str_index, first_arg)))
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// In release builds, define "unreachable" as such, but trap in debug builds
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#ifdef NDEBUG
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#define unreachable_ __builtin_unreachable
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#else
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#define unreachable_ __builtin_trap
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#endif
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#else
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// Unsupported, but no need to throw a fit
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#define format_(archetype, str_index, first_arg)
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// This seems to generate similar code to __builtin_unreachable, despite different semantics
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// Note that executing this is undefined behavior (declared _Noreturn, but does return)
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static inline _Noreturn unreachable_(void) {}
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#endif
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// Macros for stringification
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#define STR(x) #x
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#define EXPAND_AND_STR(x) STR(x)
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#endif /* HELPERS_H */
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