mirror of
https://github.com/mutouyun/cpp-ipc.git
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220 lines
6.4 KiB
C++
220 lines
6.4 KiB
C++
/**
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* \file libimp/detect_plat.h
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* \author mutouyun (orz@orzz.org)
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* \brief Define platform detection related interfaces.
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* \date 2022-02-27
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*/
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#pragma once
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/// \brief OS check.
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#if defined(WINCE) || defined(_WIN32_WCE)
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# define LIBIMP_OS_WINCE
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#elif defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
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(defined(__x86_64) && defined(__MSYS__))
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#define LIBIMP_OS_WIN64
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#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
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defined(__NT__) || defined(__MSYS__)
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# define LIBIMP_OS_WIN32
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#elif defined(__QNX__) || defined(__QNXNTO__)
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# define LIBIMP_OS_QNX
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#elif defined(__APPLE__)
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# define LIBIMP_OS_APPLE
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#elif defined(ANDROID) || defined(__ANDROID__)
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# define LIBIMP_OS_ANDROID
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#elif defined(__linux__) || defined(__linux)
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# define LIBIMP_OS_LINUX
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#elif defined(_POSIX_VERSION)
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# define LIBIMP_OS_POSIX
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#else
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# error "This OS is unsupported."
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#endif
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#if defined(LIBIMP_OS_WIN32) || defined(LIBIMP_OS_WIN64) || \
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defined(LIBIMP_OS_WINCE)
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# define LIBIMP_OS_WIN
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#endif
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/// \brief Compiler check.
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#if defined(_MSC_VER)
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# define LIBIMP_CC_MSVC _MSC_VER
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# define LIBIMP_CC_MSVC_2015 1900
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# define LIBIMP_CC_MSVC_2017 1910
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# define LIBIMP_CC_MSVC_2019 1920
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# define LIBIMP_CC_MSVC_2022 1930
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#elif defined(__GNUC__)
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# define LIBIMP_CC_GNUC __GNUC__
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# if defined(__clang__)
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# define LIBIMP_CC_CLANG
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#endif
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#else
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# error "This compiler is unsupported."
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#endif
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/// \brief Instruction set.
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/// \see https://sourceforge.net/p/predef/wiki/Architectures/
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#if defined(_M_X64) || defined(_M_AMD64) || \
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defined(__x86_64__) || defined(__x86_64) || \
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defined(__amd64__) || defined(__amd64)
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# define LIBIMP_INSTR_X64
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#elif defined(_M_IA64) || defined(__IA64__) || defined(_IA64) || \
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defined(__ia64__) || defined(__ia64)
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# define LIBIMP_INSTR_I64
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#elif defined(_M_IX86) || defined(_X86_) || defined(__i386__) || defined(__i386)
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# define LIBIMP_INSTR_X86
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#elif defined(_M_ARM64) || defined(__arm64__) || defined(__aarch64__)
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# define LIBIMP_INSTR_ARM64
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#elif defined(_M_ARM) || defined(_ARM) || defined(__arm__) || defined(__arm)
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# define LIBIMP_INSTR_ARM32
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#else
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# error "This instruction set is unsupported."
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#endif
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#if defined(LIBIMP_INSTR_X86) || defined(LIBIMP_INSTR_X64)
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# define LIBIMP_INSTR_X86_64
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#elif defined(LIBIMP_INSTR_ARM32) || defined(LIBIMP_INSTR_ARM64)
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# define LIBIMP_INSTR_ARM
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#endif
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/// \brief Byte order.
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#if defined(__BYTE_ORDER__)
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# define LIBIMP_ENDIAN_BIG (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
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# define LIBIMP_ENDIAN_LIT (!LIBIMP_ENDIAN_BIG)
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#else
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# define LIBIMP_ENDIAN_BIG (0)
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# define LIBIMP_ENDIAN_LIT (1)
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#endif
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/// \brief C++ version.
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#if (__cplusplus >= 202002L) && !defined(LIBIMP_CPP_20)
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# define LIBIMP_CPP_20
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#endif
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#if (__cplusplus >= 201703L) && !defined(LIBIMP_CPP_17)
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# define LIBIMP_CPP_17
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#endif
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#if /*(__cplusplus >= 201402L) &&*/ !defined(LIBIMP_CPP_14)
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# define LIBIMP_CPP_14
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#endif
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#if !defined(LIBIMP_CPP_20) && \
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!defined(LIBIMP_CPP_17) && \
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!defined(LIBIMP_CPP_14)
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# error "This C++ version is unsupported."
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#endif
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/// \brief C++ attributes.
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/// \see https://en.cppreference.com/w/cpp/language/attributes
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#if defined(__has_cpp_attribute)
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# if __has_cpp_attribute(fallthrough)
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# define LIBIMP_FALLTHROUGH [[fallthrough]]
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# endif
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# if __has_cpp_attribute(maybe_unused)
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# define LIBIMP_UNUSED [[maybe_unused]]
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# endif
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# if __has_cpp_attribute(likely)
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# define LIBIMP_LIKELY(...) (__VA_ARGS__) [[likely]]
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# endif
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# if __has_cpp_attribute(unlikely)
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# define LIBIMP_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
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# endif
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# if __has_cpp_attribute(nodiscard)
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# define LIBIMP_NODISCARD [[nodiscard]]
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# endif
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# if __has_cpp_attribute(assume)
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# define LIBIMP_ASSUME(...) [[assume(__VA_ARGS__)]]
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# endif
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#endif
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#if !defined(LIBIMP_FALLTHROUGH)
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# if defined(LIBIMP_CC_GNUC)
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# define LIBIMP_FALLTHROUGH __attribute__((__fallthrough__))
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# else
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# define LIBIMP_FALLTHROUGH
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# endif
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#endif
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#if !defined(LIBIMP_UNUSED)
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# if defined(LIBIMP_CC_GNUC)
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# define LIBIMP_UNUSED __attribute__((__unused__))
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# elif defined(LIBIMP_CC_MSVC)
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# define LIBIMP_UNUSED __pragma(warning(suppress: 4100 4101 4189))
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# else
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# define LIBIMP_UNUSED
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# endif
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#endif
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#if !defined(LIBIMP_LIKELY)
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# if defined(__has_builtin)
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# if __has_builtin(__builtin_expect)
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# define LIBIMP_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1))
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# endif
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# endif
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#endif
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#if !defined(LIBIMP_LIKELY)
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# define LIBIMP_LIKELY(...) (__VA_ARGS__)
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#endif
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#if !defined(LIBIMP_UNLIKELY)
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# if defined(__has_builtin)
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# if __has_builtin(__builtin_expect)
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# define LIBIMP_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0))
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# endif
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# endif
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#endif
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#if !defined(LIBIMP_UNLIKELY)
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# define LIBIMP_UNLIKELY(...) (__VA_ARGS__)
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#endif
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#if !defined(LIBIMP_NODISCARD)
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/// \see https://stackoverflow.com/questions/4226308/msvc-equivalent-of-attribute-warn-unused-result
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# if defined(LIBIMP_CC_GNUC) && (LIBIMP_CC_GNUC >= 4)
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# define LIBIMP_NODISCARD __attribute__((warn_unused_result))
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# elif defined(LIBIMP_CC_MSVC) && (LIBIMP_CC_MSVC >= 1700)
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# define LIBIMP_NODISCARD _Check_return_
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# else
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# define LIBIMP_NODISCARD
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# endif
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#endif
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#if !defined(LIBIMP_ASSUME)
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# if defined(__has_builtin)
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# if __has_builtin(__builtin_assume)
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/// \see https://clang.llvm.org/docs/LanguageExtensions.html#langext-builtin-assume
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# define LIBIMP_ASSUME(...) __builtin_assume(__VA_ARGS__)
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# elif __has_builtin(__builtin_unreachable)
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/// \see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005funreachable
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# define LIBIMP_ASSUME(...) do { if (!(__VA_ARGS__)) __builtin_unreachable(); } while (false)
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# endif
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# endif
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#endif
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#if !defined(LIBIMP_ASSUME)
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# if defined(LIBIMP_CC_MSVC)
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/// \see https://learn.microsoft.com/en-us/cpp/intrinsics/assume?view=msvc-140
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# define LIBIMP_ASSUME(...) __assume(__VA_ARGS__)
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# else
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# define LIBIMP_ASSUME(...)
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# endif
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#endif
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/// \see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
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/// https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
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/// https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
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#if defined(__cpp_exceptions) && __cpp_exceptions || \
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defined(__EXCEPTIONS) || defined(_CPPUNWIND)
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# define LIBIMP_TRY try
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# define LIBIMP_CATCH(...) catch (__VA_ARGS__)
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# define LIBIMP_THROW($EXCEPTION, ...) throw $EXCEPTION
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#else
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# define LIBIMP_TRY if (true)
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# define LIBIMP_CATCH(...) else if (false)
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# define LIBIMP_THROW($EXCEPTION, ...) return __VA_ARGS__
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#endif
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