X-Git-Url: http://plrg.eecs.uci.edu/git/?p=folly.git;a=blobdiff_plain;f=folly%2FPortability.h;h=3831f04d43580d5601cb8919be6c5952af891221;hp=51032fdacd43addc99388e9f765cca2e246e77a4;hb=b22d1721ed9c062e22b33936e13b39ed1507391a;hpb=c31d639e15ceb2a1fab05f1318f886df7c18bbcb diff --git a/folly/Portability.h b/folly/Portability.h index 51032fda..3831f04d 100644 --- a/folly/Portability.h +++ b/folly/Portability.h @@ -1,5 +1,5 @@ /* - * Copyright 2017 Facebook, Inc. + * Copyright 2017-present Facebook, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -16,8 +16,6 @@ #pragma once -#include - #include #include @@ -31,20 +29,11 @@ constexpr bool kHasUnalignedAccess = true; #else constexpr bool kHasUnalignedAccess = false; #endif -} +} // namespace folly // compiler specific attribute translation // msvc should come first, so if clang is in msvc mode it gets the right defines -#if defined(__clang__) || defined(__GNUC__) -# define FOLLY_ALIGNED(size) __attribute__((__aligned__(size))) -#elif defined(_MSC_VER) -# define FOLLY_ALIGNED(size) __declspec(align(size)) -#else -# error Cannot define FOLLY_ALIGNED on this platform -#endif -#define FOLLY_ALIGNED_MAX FOLLY_ALIGNED(alignof(std::max_align_t)) - // NOTE: this will only do checking in msvc with versions that support /analyze #if _MSC_VER # ifdef _USE_ATTRIBUTES_FOR_SAL @@ -52,7 +41,7 @@ constexpr bool kHasUnalignedAccess = false; # endif /* nolint */ # define _USE_ATTRIBUTES_FOR_SAL 1 -# include +# include // @manual # define FOLLY_PRINTF_FORMAT _Printf_format_string_ # define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) /**/ #else @@ -71,12 +60,19 @@ constexpr bool kHasUnalignedAccess = false; #endif // warn unused result +#if defined(__has_cpp_attribute) +#if __has_cpp_attribute(nodiscard) +#define FOLLY_NODISCARD [[nodiscard]] +#endif +#endif +#if !defined FOLLY_NODISCARD #if defined(_MSC_VER) && (_MSC_VER >= 1700) -#define FOLLY_WARN_UNUSED_RESULT _Check_return_ +#define FOLLY_NODISCARD _Check_return_ #elif defined(__clang__) || defined(__GNUC__) -#define FOLLY_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) +#define FOLLY_NODISCARD __attribute__((__warn_unused_result__)) #else -#define FOLLY_WARN_UNUSED_RESULT +#define FOLLY_NODISCARD +#endif #endif // target @@ -93,10 +89,16 @@ constexpr bool kHasUnalignedAccess = false; # define FOLLY_X64 0 #endif +#if defined(__arm__) +#define FOLLY_ARM 1 +#else +#define FOLLY_ARM 0 +#endif + #if defined(__aarch64__) -# define FOLLY_A64 1 +# define FOLLY_AARCH64 1 #else -# define FOLLY_A64 0 +# define FOLLY_AARCH64 0 #endif #if defined (__powerpc64__) @@ -106,10 +108,11 @@ constexpr bool kHasUnalignedAccess = false; #endif namespace folly { +constexpr bool kIsArchArm = FOLLY_ARM == 1; constexpr bool kIsArchAmd64 = FOLLY_X64 == 1; -constexpr bool kIsArchAArch64 = FOLLY_A64 == 1; +constexpr bool kIsArchAArch64 = FOLLY_AARCH64 == 1; constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1; -} +} // namespace folly namespace folly { @@ -124,7 +127,13 @@ constexpr bool kIsSanitizeThread = true; #else constexpr bool kIsSanitizeThread = false; #endif -} + +#if FOLLY_SANITIZE +constexpr bool kIsSanitize = true; +#else +constexpr bool kIsSanitize = false; +#endif +} // namespace folly // packing is very ugly in msvc #ifdef _MSC_VER @@ -164,7 +173,7 @@ constexpr bool kIsSanitizeThread = false; # define FOLLY_MSVC_DISABLE_WARNING(warningNumber) #endif -#ifdef HAVE_SHADOW_LOCAL_WARNINGS +#ifdef FOLLY_HAVE_SHADOW_LOCAL_WARNINGS #define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS \ FOLLY_GCC_DISABLE_WARNING("-Wshadow-compatible-local") \ FOLLY_GCC_DISABLE_WARNING("-Wshadow-local") @@ -172,25 +181,6 @@ constexpr bool kIsSanitizeThread = false; #define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS /* empty */ #endif -#if defined(__GNUC__) && !defined(__APPLE__) && !__GNUC_PREREQ(4,9) -// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56019 -// gcc 4.8.x incorrectly placed max_align_t in the root namespace -// Alias it into std (where it's found in 4.9 and later) -namespace std { typedef ::max_align_t max_align_t; } -#endif - -// portable version check for clang -#ifndef __CLANG_PREREQ -# if defined __clang__ && defined __clang_major__ && defined __clang_minor__ -/* nolint */ -# define __CLANG_PREREQ(maj, min) \ - ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) -# else -/* nolint */ -# define __CLANG_PREREQ(maj, min) 0 -# endif -#endif - /* Platform specific TLS support * gcc implements __thread * msvc implements __declspec(thread) @@ -213,7 +203,7 @@ namespace std { typedef ::max_align_t max_align_t; } // the 'std' namespace; the latter uses inline namespaces. Wrap this decision // up in a macro to make forward-declarations easier. #if FOLLY_USE_LIBCPP -#include <__config> +#include <__config> // @manual #define FOLLY_NAMESPACE_STD_BEGIN _LIBCPP_BEGIN_NAMESPACE_STD #define FOLLY_NAMESPACE_STD_END _LIBCPP_END_NAMESPACE_STD #else @@ -257,7 +247,7 @@ constexpr auto kIsDebug = false; #else constexpr auto kIsDebug = true; #endif -} +} // namespace folly // Endianness namespace folly { @@ -272,7 +262,7 @@ constexpr auto kIsLittleEndian = true; constexpr auto kIsLittleEndian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__; #endif constexpr auto kIsBigEndian = !kIsLittleEndian; -} +} // namespace folly #ifndef FOLLY_SSE # if defined(__SSE4_2__) @@ -306,12 +296,12 @@ constexpr auto kIsBigEndian = !kIsLittleEndian; namespace FOLLY_GFLAGS_NAMESPACE { } namespace gflags { using namespace FOLLY_GFLAGS_NAMESPACE; -} // namespace gflags +} // namespace gflags #endif // for TARGET_OS_IPHONE #ifdef __APPLE__ -#include +#include // @manual #endif // RTTI may not be enabled for this compilation unit. @@ -337,6 +327,12 @@ constexpr auto kIsObjC = true; constexpr auto kIsObjC = false; #endif +#if FOLLY_MOBILE +constexpr auto kIsMobile = true; +#else +constexpr auto kIsMobile = false; +#endif + #if defined(__linux__) && !FOLLY_MOBILE constexpr auto kIsLinux = true; #else @@ -345,7 +341,38 @@ constexpr auto kIsLinux = false; #if defined(_WIN32) constexpr auto kIsWindows = true; +constexpr auto kMscVer = _MSC_VER; #else constexpr auto kIsWindows = false; +constexpr auto kMscVer = 0; +#endif +} // namespace folly + +// Define FOLLY_USE_CPP14_CONSTEXPR to be true if the compiler's C++14 +// constexpr support is "good enough". +#ifndef FOLLY_USE_CPP14_CONSTEXPR +#if defined(__clang__) +#define FOLLY_USE_CPP14_CONSTEXPR __cplusplus >= 201300L +#elif defined(__GNUC__) +#define FOLLY_USE_CPP14_CONSTEXPR __cplusplus >= 201304L +#else +#define FOLLY_USE_CPP14_CONSTEXPR 0 // MSVC? +#endif +#endif + +#if FOLLY_USE_CPP14_CONSTEXPR +#define FOLLY_CPP14_CONSTEXPR constexpr +#else +#define FOLLY_CPP14_CONSTEXPR inline +#endif + +#if __cpp_coroutines >= 201703L && FOLLY_HAS_INCLUDE() +#define FOLLY_HAS_COROUTINES 1 +#elif _MSC_VER && _RESUMABLE_FUNCTIONS_SUPPORTED +#define FOLLY_HAS_COROUTINES 1 +#endif + +// MSVC 2017.5 +#if __cpp_noexcept_function_type >= 201510 || _MSC_FULL_VER >= 191225816 +#define FOLLY_HAVE_NOEXCEPT_FUNCTION_TYPE 1 #endif -}