119 lines
2.8 KiB
C++
119 lines
2.8 KiB
C++
/* SPDX-License-Identifier: BSL-1.0 OR BSD-3-Clause */
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#ifndef MPT_BASE_MACROS_HPP
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#define MPT_BASE_MACROS_HPP
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#include "mpt/base/detect.hpp"
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#include <type_traits>
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#if MPT_COMPILER_MSVC && MPT_OS_WINDOWS
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#include <arch.h>
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#endif // MPT_COMPILER_MSVC && MPT_OS_WINDOWS
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// Advanced inline attributes
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#if MPT_COMPILER_MSVC
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#define MPT_FORCEINLINE __forceinline
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#define MPT_NOINLINE __declspec(noinline)
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#elif MPT_COMPILER_GCC || MPT_COMPILER_CLANG
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#define MPT_FORCEINLINE __attribute__((always_inline)) inline
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#define MPT_NOINLINE __attribute__((noinline))
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#else
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#define MPT_FORCEINLINE inline
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#define MPT_NOINLINE
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#endif
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// constexpr
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#define MPT_CONSTEXPRINLINE constexpr MPT_FORCEINLINE
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#if MPT_CXX_AT_LEAST(20)
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#define MPT_CONSTEXPR20_FUN constexpr MPT_FORCEINLINE
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#define MPT_CONSTEXPR20_VAR constexpr
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#else // !C++20
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#define MPT_CONSTEXPR20_FUN MPT_FORCEINLINE
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#define MPT_CONSTEXPR20_VAR const
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#endif // C++20
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#define MPT_FORCE_CONSTEXPR(expr) [&]() { \
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constexpr auto x = (expr); \
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return x; \
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}()
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#if MPT_CXX_AT_LEAST(20)
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#define MPT_IS_CONSTANT_EVALUATED20() std::is_constant_evaluated()
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#define MPT_IS_CONSTANT_EVALUATED() std::is_constant_evaluated()
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#else // !C++20
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#define MPT_IS_CONSTANT_EVALUATED20() false
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// this pessimizes the case for C++17 by always assuming constexpr context, which implies always running constexpr-friendly code
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#define MPT_IS_CONSTANT_EVALUATED() true
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#endif // C++20
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#if MPT_COMPILER_MSVC
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#define MPT_MAYBE_CONSTANT_IF(x) \
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__pragma(warning(push)) \
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__pragma(warning(disable : 4127)) \
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if (x) \
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__pragma(warning(pop)) \
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/**/
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#endif
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#if MPT_COMPILER_GCC
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#define MPT_MAYBE_CONSTANT_IF(x) \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wtype-limits\"") \
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if (x) \
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_Pragma("GCC diagnostic pop") \
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/**/
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#endif
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#if MPT_COMPILER_CLANG
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#define MPT_MAYBE_CONSTANT_IF(x) \
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_Pragma("clang diagnostic push") \
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_Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"") \
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_Pragma("clang diagnostic ignored \"-Wtype-limits\"") \
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_Pragma("clang diagnostic ignored \"-Wtautological-constant-out-of-range-compare\"") \
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if (x) \
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_Pragma("clang diagnostic pop") \
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/**/
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#endif
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#if !defined(MPT_MAYBE_CONSTANT_IF)
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// MPT_MAYBE_CONSTANT_IF disables compiler warnings for conditions that may in some case be either always false or always true (this may turn out to be useful in ASSERTions in some cases).
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#define MPT_MAYBE_CONSTANT_IF(x) if (x)
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#endif
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#if MPT_COMPILER_MSVC && MPT_OS_WINDOWS
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#define MPT_UNUSED(x) UNREFERENCED_PARAMETER(x)
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#else
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#define MPT_UNUSED(x) static_cast<void>(x)
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#endif
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#define MPT_DISCARD(expr) static_cast<void>(expr)
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// Use MPT_RESTRICT to indicate that a pointer is guaranteed to not be aliased.
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#if MPT_COMPILER_MSVC || MPT_COMPILER_GCC || MPT_COMPILER_CLANG
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#define MPT_RESTRICT __restrict
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#else
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#define MPT_RESTRICT
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#endif
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#endif // MPT_BASE_MACROS_HPP
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