501 lines
13 KiB
C
501 lines
13 KiB
C
|
/*
|
||
|
|
* Copyright 2011-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.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <cstddef>
|
||
|
|
|
||
|
|
#include <folly/portability/Config.h>
|
||
|
|
#include <folly/CPortability.h>
|
||
|
|
|
||
|
|
// Unaligned loads and stores
|
||
|
|
namespace folly {
|
||
|
|
#if FOLLY_HAVE_UNALIGNED_ACCESS
|
||
|
|
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
|
||
|
|
|
||
|
|
// NOTE: this will only do checking in msvc with versions that support /analyze
|
||
|
|
#if _MSC_VER
|
||
|
|
#ifdef _USE_ATTRIBUTES_FOR_SAL
|
||
|
|
#undef _USE_ATTRIBUTES_FOR_SAL
|
||
|
|
#endif
|
||
|
|
/* nolint */
|
||
|
|
#define _USE_ATTRIBUTES_FOR_SAL 1
|
||
|
|
#include <sal.h> // @manual
|
||
|
|
#define FOLLY_PRINTF_FORMAT _Printf_format_string_
|
||
|
|
#define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) /**/
|
||
|
|
#else
|
||
|
|
#define FOLLY_PRINTF_FORMAT /**/
|
||
|
|
#define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) \
|
||
|
|
__attribute__((__format__(__printf__, format_param, dots_param)))
|
||
|
|
#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_NODISCARD _Check_return_
|
||
|
|
#elif defined(__clang__) || defined(__GNUC__)
|
||
|
|
#define FOLLY_NODISCARD __attribute__((__warn_unused_result__))
|
||
|
|
#else
|
||
|
|
#define FOLLY_NODISCARD
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// target
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
#define FOLLY_TARGET_ATTRIBUTE(target)
|
||
|
|
#else
|
||
|
|
#define FOLLY_TARGET_ATTRIBUTE(target) __attribute__((__target__(target)))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// detection for 64 bit
|
||
|
|
#if defined(__x86_64__) || defined(_M_X64)
|
||
|
|
#define FOLLY_X64 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_X64 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__arm__)
|
||
|
|
#define FOLLY_ARM 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_ARM 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__aarch64__)
|
||
|
|
#define FOLLY_AARCH64 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_AARCH64 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__powerpc64__)
|
||
|
|
#define FOLLY_PPC64 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_PPC64 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace folly {
|
||
|
|
constexpr bool kIsArchArm = FOLLY_ARM == 1;
|
||
|
|
constexpr bool kIsArchAmd64 = FOLLY_X64 == 1;
|
||
|
|
constexpr bool kIsArchAArch64 = FOLLY_AARCH64 == 1;
|
||
|
|
constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
|
||
|
|
} // namespace folly
|
||
|
|
|
||
|
|
namespace folly {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* folly::kIsSanitizeAddress reports if folly was compiled with ASAN
|
||
|
|
* enabled. Note that for compilation units outside of folly that include
|
||
|
|
* folly/Portability.h, the value of kIsSanitizeAddress may be different
|
||
|
|
* from whether or not the current compilation unit is being compiled with ASAN.
|
||
|
|
*/
|
||
|
|
#if FOLLY_ASAN_ENABLED
|
||
|
|
constexpr bool kIsSanitizeAddress = true;
|
||
|
|
#else
|
||
|
|
constexpr bool kIsSanitizeAddress = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FOLLY_SANITIZE_THREAD
|
||
|
|
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
|
||
|
|
#define FOLLY_PACK_ATTR /**/
|
||
|
|
#define FOLLY_PACK_PUSH __pragma(pack(push, 1))
|
||
|
|
#define FOLLY_PACK_POP __pragma(pack(pop))
|
||
|
|
#elif defined(__clang__) || defined(__GNUC__)
|
||
|
|
#define FOLLY_PACK_ATTR __attribute__((__packed__))
|
||
|
|
#define FOLLY_PACK_PUSH /**/
|
||
|
|
#define FOLLY_PACK_POP /**/
|
||
|
|
#else
|
||
|
|
#define FOLLY_PACK_ATTR /**/
|
||
|
|
#define FOLLY_PACK_PUSH /**/
|
||
|
|
#define FOLLY_PACK_POP /**/
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Generalize warning push/pop.
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#define FOLLY_PUSH_WARNING __pragma(warning(push))
|
||
|
|
#define FOLLY_POP_WARNING __pragma(warning(pop))
|
||
|
|
// Disable the GCC warnings.
|
||
|
|
#define FOLLY_GNU_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_GCC_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_CLANG_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_MSVC_DISABLE_WARNING(warningNumber) \
|
||
|
|
__pragma(warning(disable : warningNumber))
|
||
|
|
#elif defined(__GNUC__)
|
||
|
|
// Clang & GCC
|
||
|
|
#define FOLLY_PUSH_WARNING _Pragma("GCC diagnostic push")
|
||
|
|
#define FOLLY_POP_WARNING _Pragma("GCC diagnostic pop")
|
||
|
|
#define FOLLY_GNU_DISABLE_WARNING_INTERNAL2(warningName) #warningName
|
||
|
|
#define FOLLY_GNU_DISABLE_WARNING(warningName) \
|
||
|
|
_Pragma( \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING_INTERNAL2(GCC diagnostic ignored warningName))
|
||
|
|
#ifdef __clang__
|
||
|
|
#define FOLLY_CLANG_DISABLE_WARNING(warningName) \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_GCC_DISABLE_WARNING(warningName)
|
||
|
|
#else
|
||
|
|
#define FOLLY_CLANG_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_GCC_DISABLE_WARNING(warningName) \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING(warningName)
|
||
|
|
#endif
|
||
|
|
#define FOLLY_MSVC_DISABLE_WARNING(warningNumber)
|
||
|
|
#else
|
||
|
|
#define FOLLY_PUSH_WARNING
|
||
|
|
#define FOLLY_POP_WARNING
|
||
|
|
#define FOLLY_GNU_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_GCC_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_CLANG_DISABLE_WARNING(warningName)
|
||
|
|
#define FOLLY_MSVC_DISABLE_WARNING(warningNumber)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef FOLLY_HAVE_SHADOW_LOCAL_WARNINGS
|
||
|
|
#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING("-Wshadow-compatible-local") \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING("-Wshadow-local") \
|
||
|
|
FOLLY_GNU_DISABLE_WARNING("-Wshadow")
|
||
|
|
#else
|
||
|
|
#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS /* empty */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Globally disable -Wshadow for gcc < 5.
|
||
|
|
#if __GNUC__ == 4 && !__clang__
|
||
|
|
FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Platform specific TLS support
|
||
|
|
* gcc implements __thread
|
||
|
|
* msvc implements __declspec(thread)
|
||
|
|
* the semantics are the same
|
||
|
|
* (but remember __thread has different semantics when using emutls (ex. apple))
|
||
|
|
*/
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#define FOLLY_TLS __declspec(thread)
|
||
|
|
#elif defined(__GNUC__) || defined(__clang__)
|
||
|
|
#define FOLLY_TLS __thread
|
||
|
|
#else
|
||
|
|
#error cannot define platform specific thread local storage
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FOLLY_MOBILE
|
||
|
|
#undef FOLLY_TLS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// It turns out that GNU libstdc++ and LLVM libc++ differ on how they implement
|
||
|
|
// 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> // @manual
|
||
|
|
#define FOLLY_NAMESPACE_STD_BEGIN _LIBCPP_BEGIN_NAMESPACE_STD
|
||
|
|
#define FOLLY_NAMESPACE_STD_END _LIBCPP_END_NAMESPACE_STD
|
||
|
|
#else
|
||
|
|
#define FOLLY_NAMESPACE_STD_BEGIN namespace std {
|
||
|
|
#define FOLLY_NAMESPACE_STD_END }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// If the new c++ ABI is used, __cxx11 inline namespace needs to be added to
|
||
|
|
// some types, e.g. std::list.
|
||
|
|
#if _GLIBCXX_USE_CXX11_ABI
|
||
|
|
#define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN \
|
||
|
|
inline _GLIBCXX_BEGIN_NAMESPACE_CXX11
|
||
|
|
#define FOLLY_GLIBCXX_NAMESPACE_CXX11_END _GLIBCXX_END_NAMESPACE_CXX11
|
||
|
|
#else
|
||
|
|
#define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN
|
||
|
|
#define FOLLY_GLIBCXX_NAMESPACE_CXX11_END
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// MSVC specific defines
|
||
|
|
// mainly for posix compat
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
#include <folly/portability/SysTypes.h>
|
||
|
|
|
||
|
|
// compiler specific to compiler specific
|
||
|
|
// nolint
|
||
|
|
#define __PRETTY_FUNCTION__ __FUNCSIG__
|
||
|
|
|
||
|
|
// Hide a GCC specific thing that breaks MSVC if left alone.
|
||
|
|
#define __extension__
|
||
|
|
|
||
|
|
// We have compiler support for the newest of the new, but
|
||
|
|
// MSVC doesn't tell us that.
|
||
|
|
#define __SSE4_2__ 1
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Debug
|
||
|
|
namespace folly {
|
||
|
|
#ifdef NDEBUG
|
||
|
|
constexpr auto kIsDebug = false;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsDebug = true;
|
||
|
|
#endif
|
||
|
|
} // namespace folly
|
||
|
|
|
||
|
|
// Endianness
|
||
|
|
namespace folly {
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
// It's MSVC, so we just have to guess ... and allow an override
|
||
|
|
#ifdef FOLLY_ENDIAN_BE
|
||
|
|
constexpr auto kIsLittleEndian = false;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsLittleEndian = true;
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
constexpr auto kIsLittleEndian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__;
|
||
|
|
#endif
|
||
|
|
constexpr auto kIsBigEndian = !kIsLittleEndian;
|
||
|
|
} // namespace folly
|
||
|
|
|
||
|
|
#ifndef FOLLY_SSE
|
||
|
|
#if defined(__SSE4_2__)
|
||
|
|
#define FOLLY_SSE 4
|
||
|
|
#define FOLLY_SSE_MINOR 2
|
||
|
|
#elif defined(__SSE4_1__)
|
||
|
|
#define FOLLY_SSE 4
|
||
|
|
#define FOLLY_SSE_MINOR 1
|
||
|
|
#elif defined(__SSE4__)
|
||
|
|
#define FOLLY_SSE 4
|
||
|
|
#define FOLLY_SSE_MINOR 0
|
||
|
|
#elif defined(__SSE3__)
|
||
|
|
#define FOLLY_SSE 3
|
||
|
|
#define FOLLY_SSE_MINOR 0
|
||
|
|
#elif defined(__SSE2__)
|
||
|
|
#define FOLLY_SSE 2
|
||
|
|
#define FOLLY_SSE_MINOR 0
|
||
|
|
#elif defined(__SSE__)
|
||
|
|
#define FOLLY_SSE 1
|
||
|
|
#define FOLLY_SSE_MINOR 0
|
||
|
|
#else
|
||
|
|
#define FOLLY_SSE 0
|
||
|
|
#define FOLLY_SSE_MINOR 0
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define FOLLY_SSE_PREREQ(major, minor) \
|
||
|
|
(FOLLY_SSE > major || FOLLY_SSE == major && FOLLY_SSE_MINOR >= minor)
|
||
|
|
|
||
|
|
#ifndef FOLLY_NEON
|
||
|
|
#if defined(__ARM_NEON) || defined(__ARM_NEON__)
|
||
|
|
#define FOLLY_NEON 1
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FOLLY_UNUSUAL_GFLAGS_NAMESPACE
|
||
|
|
namespace FOLLY_GFLAGS_NAMESPACE {}
|
||
|
|
namespace gflags {
|
||
|
|
using namespace FOLLY_GFLAGS_NAMESPACE;
|
||
|
|
} // namespace gflags
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// for TARGET_OS_IPHONE
|
||
|
|
#ifdef __APPLE__
|
||
|
|
#include <TargetConditionals.h> // @manual
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// RTTI may not be enabled for this compilation unit.
|
||
|
|
#if defined(__GXX_RTTI) || defined(__cpp_rtti) || \
|
||
|
|
(defined(_MSC_VER) && defined(_CPPRTTI))
|
||
|
|
#define FOLLY_HAS_RTTI 1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__APPLE__) || defined(_MSC_VER)
|
||
|
|
#define FOLLY_STATIC_CTOR_PRIORITY_MAX
|
||
|
|
#else
|
||
|
|
// 101 is the highest priority allowed by the init_priority attribute.
|
||
|
|
// This priority is already used by JEMalloc and other memory allocators so
|
||
|
|
// we will take the next one.
|
||
|
|
#define FOLLY_STATIC_CTOR_PRIORITY_MAX __attribute__((__init_priority__(102)))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace folly {
|
||
|
|
|
||
|
|
#if __OBJC__
|
||
|
|
constexpr auto kIsObjC = true;
|
||
|
|
#else
|
||
|
|
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
|
||
|
|
constexpr auto kIsLinux = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(_WIN32)
|
||
|
|
constexpr auto kIsWindows = true;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsWindows = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if __GLIBCXX__
|
||
|
|
constexpr auto kIsGlibcxx = true;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsGlibcxx = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if _LIBCPP_VERSION
|
||
|
|
constexpr auto kIsLibcpp = true;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsLibcpp = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FOLLY_USE_LIBSTDCPP
|
||
|
|
constexpr auto kIsLibstdcpp = true;
|
||
|
|
#else
|
||
|
|
constexpr auto kIsLibstdcpp = false;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if _MSC_VER
|
||
|
|
constexpr auto kMscVer = _MSC_VER;
|
||
|
|
#else
|
||
|
|
constexpr auto kMscVer = 0;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FOLLY_MICROSOFT_ABI_VER
|
||
|
|
constexpr auto kMicrosoftAbiVer = FOLLY_MICROSOFT_ABI_VER;
|
||
|
|
#else
|
||
|
|
constexpr auto kMicrosoftAbiVer = 0;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// cpplib is an implementation of the standard library, and is the one typically
|
||
|
|
// used with the msvc compiler
|
||
|
|
#if _CPPLIB_VER
|
||
|
|
constexpr auto kCpplibVer = _CPPLIB_VER;
|
||
|
|
#else
|
||
|
|
constexpr auto kCpplibVer = 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
|
||
|
|
|
||
|
|
// MSVC does not permit:
|
||
|
|
//
|
||
|
|
// extern int const num;
|
||
|
|
// constexpr int const num = 3;
|
||
|
|
//
|
||
|
|
// Instead:
|
||
|
|
//
|
||
|
|
// extern int const num;
|
||
|
|
// FOLLY_STORAGE_CONSTEXPR int const num = 3;
|
||
|
|
//
|
||
|
|
// True for MSVC 2015 and MSVC 2017.
|
||
|
|
#if _MSC_VER
|
||
|
|
#define FOLLY_STORAGE_CONSTEXPR
|
||
|
|
#define FOLLY_STORAGE_CPP14_CONSTEXPR
|
||
|
|
#else
|
||
|
|
#if __ICC
|
||
|
|
#define FOLLY_STORAGE_CONSTEXPR
|
||
|
|
#else
|
||
|
|
#define FOLLY_STORAGE_CONSTEXPR constexpr
|
||
|
|
#endif
|
||
|
|
#if FOLLY_USE_CPP14_CONSTEXPR
|
||
|
|
#define FOLLY_STORAGE_CPP14_CONSTEXPR constexpr
|
||
|
|
#else
|
||
|
|
#define FOLLY_STORAGE_CPP14_CONSTEXPR
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if __cpp_coroutines >= 201703L && __has_include(<experimental/coroutine>)
|
||
|
|
#define FOLLY_HAS_COROUTINES 1
|
||
|
|
#elif _MSC_VER && _RESUMABLE_FUNCTIONS_SUPPORTED
|
||
|
|
#define FOLLY_HAS_COROUTINES 1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// MSVC 2017.5 && C++17
|
||
|
|
#if __cpp_noexcept_function_type >= 201510 || \
|
||
|
|
(_MSC_FULL_VER >= 191225816 && _MSVC_LANG > 201402)
|
||
|
|
#define FOLLY_HAVE_NOEXCEPT_FUNCTION_TYPE 1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Define FOLLY_HAS_EXCEPTIONS
|
||
|
|
#if __cpp_exceptions >= 199711 || FOLLY_HAS_FEATURE(cxx_exceptions)
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 1
|
||
|
|
#elif __GNUC__
|
||
|
|
#if __EXCEPTIONS
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 1
|
||
|
|
#else // __EXCEPTIONS
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 0
|
||
|
|
#endif // __EXCEPTIONS
|
||
|
|
#elif FOLLY_MICROSOFT_ABI_VER
|
||
|
|
#if _CPPUNWIND
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 1
|
||
|
|
#else // _CPPUNWIND
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 0
|
||
|
|
#endif // _CPPUNWIND
|
||
|
|
#else
|
||
|
|
#define FOLLY_HAS_EXCEPTIONS 1 // default assumption for unknown platforms
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// feature test __cpp_lib_string_view is defined in <string>, which is
|
||
|
|
// too heavy to include here. MSVC __has_include support arrived later
|
||
|
|
// than string_view, so we need an alternate case for it.
|
||
|
|
#ifdef __has_include
|
||
|
|
#if __has_include(<string_view>) && __cplusplus >= 201703L
|
||
|
|
#define FOLLY_HAS_STRING_VIEW 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_HAS_STRING_VIEW 0
|
||
|
|
#endif
|
||
|
|
#else // __has_include
|
||
|
|
#if _MSC_VER >= 1910 && (_MSVC_LANG > 201402 || __cplusplus > 201402)
|
||
|
|
#define FOLLY_HAS_STRING_VIEW 1
|
||
|
|
#else
|
||
|
|
#define FOLLY_HAS_STRING_VIEW 0
|
||
|
|
#endif
|
||
|
|
#endif // __has_include
|