| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___CONFIG |
| #define _LIBCPP___CONFIG |
| |
| #include <__config_site> |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER |
| # endif |
| #endif |
| |
| #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER |
| # pragma GCC system_header |
| #endif |
| |
| #ifdef __cplusplus |
| |
| # define _LIBCPP_VERSION 15000 |
| |
| # if __STDC_HOSTED__ == 0 |
| # define _LIBCPP_FREESTANDING |
| # endif |
| |
| # ifndef _LIBCPP_STD_VER |
| # if __cplusplus <= 201103L |
| # define _LIBCPP_STD_VER 11 |
| # elif __cplusplus <= 201402L |
| # define _LIBCPP_STD_VER 14 |
| # elif __cplusplus <= 201703L |
| # define _LIBCPP_STD_VER 17 |
| # elif __cplusplus <= 202002L |
| # define _LIBCPP_STD_VER 20 |
| # else |
| # define _LIBCPP_STD_VER 22 // current year, or date of c++2b ratification |
| # endif |
| # endif // _LIBCPP_STD_VER |
| |
| # if defined(__ELF__) |
| # define _LIBCPP_OBJECT_FORMAT_ELF 1 |
| # elif defined(__MACH__) |
| # define _LIBCPP_OBJECT_FORMAT_MACHO 1 |
| # elif defined(_WIN32) |
| # define _LIBCPP_OBJECT_FORMAT_COFF 1 |
| # elif defined(__wasm__) |
| # define _LIBCPP_OBJECT_FORMAT_WASM 1 |
| # elif defined(_AIX) |
| # define _LIBCPP_OBJECT_FORMAT_XCOFF 1 |
| # else |
| // ... add new file formats here ... |
| # endif |
| |
| # if _LIBCPP_ABI_VERSION >= 2 |
| // Change short string representation so that string data starts at offset 0, |
| // improving its alignment in some cases. |
| # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT |
| // Fix deque iterator type in order to support incomplete types. |
| # define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE |
| // Fix undefined behavior in how std::list stores its linked nodes. |
| # define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB |
| // Fix undefined behavior in how __tree stores its end and parent nodes. |
| # define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB |
| // Fix undefined behavior in how __hash_table stores its pointer types. |
| # define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB |
| # define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB |
| # define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE |
| // Define a key function for `bad_function_call` in the library, to centralize |
| // its vtable and typeinfo to libc++ rather than having all other libraries |
| // using that class define their own copies. |
| # define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION |
| // Override the default return value of exception::what() for |
| // bad_function_call::what() with a string that is specific to |
| // bad_function_call (see http://wg21.link/LWG2233). This is an ABI break |
| // because it changes the vtable layout of bad_function_call. |
| # define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE |
| // Enable optimized version of __do_get_(un)signed which avoids redundant copies. |
| # define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET |
| // In C++20 and later, don't derive std::plus from std::binary_function, |
| // nor std::negate from std::unary_function. |
| # define _LIBCPP_ABI_NO_BINDER_BASES |
| // Give reverse_iterator<T> one data member of type T, not two. |
| // Also, in C++17 and later, don't derive iterator types from std::iterator. |
| # define _LIBCPP_ABI_NO_ITERATOR_BASES |
| // Use the smallest possible integer type to represent the index of the variant. |
| // Previously libc++ used "unsigned int" exclusively. |
| # define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION |
| // Unstable attempt to provide a more optimized std::function |
| # define _LIBCPP_ABI_OPTIMIZED_FUNCTION |
| // All the regex constants must be distinct and nonzero. |
| # define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO |
| // Use raw pointers, not wrapped ones, for std::span's iterator type. |
| # define _LIBCPP_ABI_SPAN_POINTER_ITERATORS |
| // Re-worked external template instantiations for std::string with a focus on |
| // performance and fast-path inlining. |
| # define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION |
| // Enable clang::trivial_abi on std::unique_ptr. |
| # define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI |
| // Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr |
| # define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI |
| // std::random_device holds some state when it uses an implementation that gets |
| // entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this |
| // implementation to another one on a platform that has already shipped |
| // std::random_device, one needs to retain the same object layout to remain ABI |
| // compatible. This switch removes these workarounds for platforms that don't care |
| // about ABI compatibility. |
| # define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT |
| // Don't export the legacy __basic_string_common class and its methods from the built library. |
| # define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON |
| // Don't export the legacy __vector_base_common class and its methods from the built library. |
| # define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON |
| // According to the Standard, `bitset::operator[] const` returns bool |
| # define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL |
| // Remove the base 10 implementation of std::to_chars from the dylib. |
| // The implementation moved to the header, but we still export the symbols from |
| // the dylib for backwards compatibility. |
| # define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 |
| # elif _LIBCPP_ABI_VERSION == 1 |
| # if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) |
| // Enable compiling copies of now inline methods into the dylib to support |
| // applications compiled against older libraries. This is unnecessary with |
| // COFF dllexport semantics, since dllexport forces a non-inline definition |
| // of inline functions to be emitted anyway. Our own non-inline copy would |
| // conflict with the dllexport-emitted copy, so we disable it. For XCOFF, |
| // the linker will take issue with the symbols in the shared object if the |
| // weak inline methods get visibility (such as from -fvisibility-inlines-hidden), |
| // so disable it. |
| # define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS |
| # endif |
| // Feature macros for disabling pre ABI v1 features. All of these options |
| // are deprecated. |
| # if defined(__FreeBSD__) |
| # define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR |
| # endif |
| # endif |
| |
| # if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 |
| // Enable additional explicit instantiations of iostreams components. This |
| // reduces the number of weak definitions generated in programs that use |
| // iostreams by providing a single strong definition in the shared library. |
| # define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 |
| |
| // Define a key function for `bad_function_call` in the library, to centralize |
| // its vtable and typeinfo to libc++ rather than having all other libraries |
| // using that class define their own copies. |
| # define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION |
| # endif |
| |
| # define _LIBCPP_TOSTRING2(x) # x |
| # define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) |
| |
| # if __cplusplus < 201103L |
| # define _LIBCPP_CXX03_LANG |
| # endif |
| |
| # ifndef __has_attribute |
| # define __has_attribute(__x) 0 |
| # endif |
| |
| # ifndef __has_builtin |
| # define __has_builtin(__x) 0 |
| # endif |
| |
| # ifndef __has_extension |
| # define __has_extension(__x) 0 |
| # endif |
| |
| # ifndef __has_feature |
| # define __has_feature(__x) 0 |
| # endif |
| |
| # ifndef __has_cpp_attribute |
| # define __has_cpp_attribute(__x) 0 |
| # endif |
| |
| // '__is_identifier' returns '0' if '__x' is a reserved identifier provided by |
| // the compiler and '1' otherwise. |
| # ifndef __is_identifier |
| # define __is_identifier(__x) 1 |
| # endif |
| |
| # ifndef __has_declspec_attribute |
| # define __has_declspec_attribute(__x) 0 |
| # endif |
| |
| # define __has_keyword(__x) !(__is_identifier(__x)) |
| |
| # ifndef __has_include |
| # define __has_include(...) 0 |
| # endif |
| |
| # if defined(__apple_build_version__) |
| # define _LIBCPP_COMPILER_CLANG_BASED |
| # define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) |
| # elif defined(__clang__) |
| # define _LIBCPP_COMPILER_CLANG_BASED |
| # define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) |
| # elif defined(__GNUC__) |
| # define _LIBCPP_COMPILER_GCC |
| # elif defined(_MSC_VER) |
| # define _LIBCPP_COMPILER_MSVC |
| # endif |
| |
| # if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L |
| # error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" |
| # endif |
| |
| // FIXME: ABI detection should be done via compiler builtin macros. This |
| // is just a placeholder until Clang implements such macros. For now assume |
| // that Windows compilers pretending to be MSVC++ target the Microsoft ABI, |
| // and allow the user to explicitly specify the ABI to handle cases where this |
| // heuristic falls short. |
| # if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) |
| # error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" |
| # elif defined(_LIBCPP_ABI_FORCE_ITANIUM) |
| # define _LIBCPP_ABI_ITANIUM |
| # elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) |
| # define _LIBCPP_ABI_MICROSOFT |
| # else |
| # if defined(_WIN32) && defined(_MSC_VER) |
| # define _LIBCPP_ABI_MICROSOFT |
| # else |
| # define _LIBCPP_ABI_ITANIUM |
| # endif |
| # endif |
| |
| # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) |
| # define _LIBCPP_ABI_VCRUNTIME |
| # endif |
| |
| // Need to detect which libc we're using if we're on Linux. |
| # if defined(__linux__) |
| # include <features.h> |
| # if defined(__GLIBC_PREREQ) |
| # define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) |
| # else |
| # define _LIBCPP_GLIBC_PREREQ(a, b) 0 |
| # endif // defined(__GLIBC_PREREQ) |
| # endif // defined(__linux__) |
| |
| # if defined(__MVS__) |
| # include <features.h> // for __NATIVE_ASCII_F |
| # endif |
| |
| # ifdef __LITTLE_ENDIAN__ |
| # if __LITTLE_ENDIAN__ |
| # define _LIBCPP_LITTLE_ENDIAN |
| # endif // __LITTLE_ENDIAN__ |
| # endif // __LITTLE_ENDIAN__ |
| |
| # ifdef __BIG_ENDIAN__ |
| # if __BIG_ENDIAN__ |
| # define _LIBCPP_BIG_ENDIAN |
| # endif // __BIG_ENDIAN__ |
| # endif // __BIG_ENDIAN__ |
| |
| # ifdef __BYTE_ORDER__ |
| # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| # define _LIBCPP_LITTLE_ENDIAN |
| # elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
| # define _LIBCPP_BIG_ENDIAN |
| # endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
| # endif // __BYTE_ORDER__ |
| |
| # ifdef __FreeBSD__ |
| # include <sys/endian.h> |
| # include <osreldate.h> |
| # if _BYTE_ORDER == _LITTLE_ENDIAN |
| # define _LIBCPP_LITTLE_ENDIAN |
| # else // _BYTE_ORDER == _LITTLE_ENDIAN |
| # define _LIBCPP_BIG_ENDIAN |
| # endif // _BYTE_ORDER == _LITTLE_ENDIAN |
| # endif // __FreeBSD__ |
| |
| # if defined(__NetBSD__) || defined(__OpenBSD__) |
| # include <sys/endian.h> |
| # if _BYTE_ORDER == _LITTLE_ENDIAN |
| # define _LIBCPP_LITTLE_ENDIAN |
| # else // _BYTE_ORDER == _LITTLE_ENDIAN |
| # define _LIBCPP_BIG_ENDIAN |
| # endif // _BYTE_ORDER == _LITTLE_ENDIAN |
| # endif // defined(__NetBSD__) || defined(__OpenBSD__) |
| |
| # if defined(_WIN32) |
| # define _LIBCPP_WIN32API |
| # define _LIBCPP_LITTLE_ENDIAN |
| # define _LIBCPP_SHORT_WCHAR 1 |
| // Both MinGW and native MSVC provide a "MSVC"-like environment |
| # define _LIBCPP_MSVCRT_LIKE |
| // If mingw not explicitly detected, assume using MS C runtime only if |
| // a MS compatibility version is specified. |
| # if defined(_MSC_VER) && !defined(__MINGW32__) |
| # define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library |
| # endif |
| # if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) |
| # define _LIBCPP_HAS_BITSCAN64 |
| # endif |
| # define _LIBCPP_HAS_OPEN_WITH_WCHAR |
| # endif // defined(_WIN32) |
| |
| # ifdef __sun__ |
| # include <sys/isa_defs.h> |
| # ifdef _LITTLE_ENDIAN |
| # define _LIBCPP_LITTLE_ENDIAN |
| # else |
| # define _LIBCPP_BIG_ENDIAN |
| # endif |
| # endif // __sun__ |
| |
| # if defined(_AIX) && !defined(__64BIT__) |
| // The size of wchar is 2 byte on 32-bit mode on AIX. |
| # define _LIBCPP_SHORT_WCHAR 1 |
| # endif |
| |
| // Libc++ supports various implementations of std::random_device. |
| // |
| // _LIBCPP_USING_DEV_RANDOM |
| // Read entropy from the given file, by default `/dev/urandom`. |
| // If a token is provided, it is assumed to be the path to a file |
| // to read entropy from. This is the default behavior if nothing |
| // else is specified. This implementation requires storing state |
| // inside `std::random_device`. |
| // |
| // _LIBCPP_USING_ARC4_RANDOM |
| // Use arc4random(). This allows obtaining random data even when |
| // using sandboxing mechanisms. On some platforms like Apple, this |
| // is the recommended source of entropy for user-space programs. |
| // When this option is used, the token passed to `std::random_device`'s |
| // constructor *must* be "/dev/urandom" -- anything else is an error. |
| // |
| // _LIBCPP_USING_GETENTROPY |
| // Use getentropy(). |
| // When this option is used, the token passed to `std::random_device`'s |
| // constructor *must* be "/dev/urandom" -- anything else is an error. |
| // |
| // _LIBCPP_USING_FUCHSIA_CPRNG |
| // Use Fuchsia's zx_cprng_draw() system call, which is specified to |
| // deliver high-quality entropy and cannot fail. |
| // When this option is used, the token passed to `std::random_device`'s |
| // constructor *must* be "/dev/urandom" -- anything else is an error. |
| // |
| // _LIBCPP_USING_NACL_RANDOM |
| // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, |
| // including accesses to the special files under `/dev`. This implementation |
| // uses the NaCL syscall `nacl_secure_random_init()` to get entropy. |
| // When this option is used, the token passed to `std::random_device`'s |
| // constructor *must* be "/dev/urandom" -- anything else is an error. |
| // |
| // _LIBCPP_USING_WIN32_RANDOM |
| // Use rand_s(), for use on Windows. |
| // When this option is used, the token passed to `std::random_device`'s |
| // constructor *must* be "/dev/urandom" -- anything else is an error. |
| # if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ |
| defined(__DragonFly__) || defined(__sun__) |
| # define _LIBCPP_USING_ARC4_RANDOM |
| # elif defined(__wasi__) || defined(__EMSCRIPTEN__) |
| # define _LIBCPP_USING_GETENTROPY |
| # elif defined(__Fuchsia__) |
| # define _LIBCPP_USING_FUCHSIA_CPRNG |
| # elif defined(__native_client__) |
| # define _LIBCPP_USING_NACL_RANDOM |
| # elif defined(_LIBCPP_WIN32API) |
| # define _LIBCPP_USING_WIN32_RANDOM |
| # else |
| # define _LIBCPP_USING_DEV_RANDOM |
| # endif |
| |
| # if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) |
| # include <endian.h> |
| # if __BYTE_ORDER == __LITTLE_ENDIAN |
| # define _LIBCPP_LITTLE_ENDIAN |
| # elif __BYTE_ORDER == __BIG_ENDIAN |
| # define _LIBCPP_BIG_ENDIAN |
| # else // __BYTE_ORDER == __BIG_ENDIAN |
| # error unable to determine endian |
| # endif |
| # endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) |
| |
| # if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) |
| # else |
| # define _LIBCPP_NO_CFI |
| # endif |
| |
| # ifndef _LIBCPP_CXX03_LANG |
| |
| # define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) |
| # define _ALIGNAS_TYPE(x) alignas(x) |
| # define _ALIGNAS(x) alignas(x) |
| # define _LIBCPP_NORETURN [[noreturn]] |
| # define _NOEXCEPT noexcept |
| # define _NOEXCEPT_(x) noexcept(x) |
| |
| # else |
| |
| # define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) |
| # define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) |
| # define _ALIGNAS(x) __attribute__((__aligned__(x))) |
| # define _LIBCPP_NORETURN __attribute__((noreturn)) |
| # define _LIBCPP_HAS_NO_NOEXCEPT |
| # define nullptr __nullptr |
| # define _NOEXCEPT throw() |
| # define _NOEXCEPT_(x) |
| |
| typedef __char16_t char16_t; |
| typedef __char32_t char32_t; |
| |
| # endif |
| |
| # if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L |
| # define _LIBCPP_NO_EXCEPTIONS |
| # endif |
| |
| # define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) |
| |
| # if defined(_LIBCPP_COMPILER_CLANG_BASED) |
| |
| # if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) |
| # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT |
| # endif |
| |
| // Objective-C++ features (opt-in) |
| # if __has_feature(objc_arc) |
| # define _LIBCPP_HAS_OBJC_ARC |
| # endif |
| |
| # if __has_feature(objc_arc_weak) |
| # define _LIBCPP_HAS_OBJC_ARC_WEAK |
| # endif |
| |
| # if __has_extension(blocks) |
| # define _LIBCPP_HAS_EXTENSION_BLOCKS |
| # endif |
| |
| # if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) |
| # define _LIBCPP_HAS_BLOCKS_RUNTIME |
| # endif |
| |
| # if !__has_feature(address_sanitizer) |
| # define _LIBCPP_HAS_NO_ASAN |
| # endif |
| |
| // Allow for build-time disabling of unsigned integer sanitization |
| # if __has_attribute(no_sanitize) |
| # define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) |
| # endif |
| |
| # define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) |
| |
| # define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ |
| |
| # elif defined(_LIBCPP_COMPILER_GCC) |
| |
| # if !defined(__SANITIZE_ADDRESS__) |
| # define _LIBCPP_HAS_NO_ASAN |
| # endif |
| |
| # define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) |
| |
| # define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ |
| |
| # elif defined(_LIBCPP_COMPILER_MSVC) |
| |
| # define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) |
| |
| # if _MSC_VER < 1900 |
| # error "MSVC versions prior to Visual Studio 2015 are not supported" |
| # endif |
| |
| # define _LIBCPP_NORETURN __declspec(noreturn) |
| |
| # define _LIBCPP_WEAK |
| |
| # define _LIBCPP_HAS_NO_ASAN |
| |
| # define _LIBCPP_ALWAYS_INLINE __forceinline |
| |
| # define _LIBCPP_HAS_NO_VECTOR_EXTENSION |
| |
| # define _LIBCPP_DISABLE_EXTENSION_WARNING |
| |
| # endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC] |
| |
| # if defined(_LIBCPP_OBJECT_FORMAT_COFF) |
| |
| # ifdef _DLL |
| # define _LIBCPP_CRT_FUNC __declspec(dllimport) |
| # else |
| # define _LIBCPP_CRT_FUNC |
| # endif |
| |
| # if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) |
| # define _LIBCPP_DLL_VIS |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| # define _LIBCPP_OVERRIDABLE_FUNC_VIS |
| # define _LIBCPP_EXPORTED_FROM_ABI |
| # elif defined(_LIBCPP_BUILDING_LIBRARY) |
| # define _LIBCPP_DLL_VIS __declspec(dllexport) |
| # if defined(__MINGW32__) |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| # else |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS |
| # endif |
| # define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS |
| # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) |
| # else |
| # define _LIBCPP_DLL_VIS __declspec(dllimport) |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| # define _LIBCPP_OVERRIDABLE_FUNC_VIS |
| # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) |
| # endif |
| |
| # define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS |
| # define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS |
| # define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS |
| # define _LIBCPP_HIDDEN |
| # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS |
| # define _LIBCPP_TEMPLATE_VIS |
| # define _LIBCPP_TEMPLATE_DATA_VIS |
| # define _LIBCPP_ENUM_VIS |
| |
| # endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) |
| |
| # ifndef _LIBCPP_HIDDEN |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_HIDDEN __attribute__((__visibility__("hidden"))) |
| # else |
| # define _LIBCPP_HIDDEN |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| // The inline should be removed once PR32114 is resolved |
| # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN |
| # else |
| # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_FUNC_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_FUNC_VIS __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_FUNC_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_TYPE_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_TYPE_VIS __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_TYPE_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_TEMPLATE_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # if __has_attribute(__type_visibility__) |
| # define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default"))) |
| # else |
| # define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) |
| # endif |
| # else |
| # define _LIBCPP_TEMPLATE_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_TEMPLATE_DATA_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_TEMPLATE_DATA_VIS __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_TEMPLATE_DATA_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_EXPORTED_FROM_ABI |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_EXPORTED_FROM_ABI |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS |
| # define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS |
| # endif |
| |
| # ifndef _LIBCPP_EXCEPTION_ABI |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_EXCEPTION_ABI __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_EXCEPTION_ABI |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_ENUM_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) |
| # define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default"))) |
| # else |
| # define _LIBCPP_ENUM_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| # endif |
| |
| # if __has_attribute(internal_linkage) |
| # define _LIBCPP_INTERNAL_LINKAGE __attribute__((internal_linkage)) |
| # else |
| # define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE |
| # endif |
| |
| # if __has_attribute(exclude_from_explicit_instantiation) |
| # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) |
| # else |
| // Try to approximate the effect of exclude_from_explicit_instantiation |
| // (which is that entities are not assumed to be provided by explicit |
| // template instantiations in the dylib) by always inlining those entities. |
| # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE |
| # endif |
| |
| # ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU |
| # ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT |
| # define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 |
| # else |
| # define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_HIDE_FROM_ABI |
| # if _LIBCPP_HIDE_FROM_ABI_PER_TU |
| # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE |
| # else |
| # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION |
| # endif |
| # endif |
| |
| # ifdef _LIBCPP_BUILDING_LIBRARY |
| # if _LIBCPP_ABI_VERSION > 1 |
| # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI |
| # else |
| # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 |
| # endif |
| # else |
| # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI |
| # endif |
| |
| // Just so we can migrate to the new macros gradually. |
| # define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI |
| |
| // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. |
| // clang-format off |
| # define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { |
| # define _LIBCPP_END_NAMESPACE_STD }} |
| # define _VSTD std |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD |
| |
| # if _LIBCPP_STD_VER > 14 |
| # define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ |
| _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { |
| # else |
| # define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ |
| _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { |
| # endif |
| |
| # define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} |
| // clang-format on |
| |
| # define _VSTD_FS std::__fs::filesystem |
| |
| # if __has_attribute(__enable_if__) |
| # define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) |
| # endif |
| |
| # ifndef __SIZEOF_INT128__ |
| # define _LIBCPP_HAS_NO_INT128 |
| # endif |
| |
| # ifdef _LIBCPP_CXX03_LANG |
| # define static_assert(...) _Static_assert(__VA_ARGS__) |
| # define decltype(...) __decltype(__VA_ARGS__) |
| # endif // _LIBCPP_CXX03_LANG |
| |
| # ifdef _LIBCPP_CXX03_LANG |
| # define _LIBCPP_CONSTEXPR |
| # else |
| # define _LIBCPP_CONSTEXPR constexpr |
| # endif |
| |
| # ifndef __cpp_consteval |
| # define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR |
| # else |
| # define _LIBCPP_CONSTEVAL consteval |
| # endif |
| |
| # ifdef __GNUC__ |
| # define _LIBCPP_NOALIAS __attribute__((__malloc__)) |
| # else |
| # define _LIBCPP_NOALIAS |
| # endif |
| |
| # if __has_attribute(using_if_exists) |
| # define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) |
| # else |
| # define _LIBCPP_USING_IF_EXISTS |
| # endif |
| |
| # ifdef _LIBCPP_CXX03_LANG |
| # define _LIBCPP_DECLARE_STRONG_ENUM(x) \ |
| struct _LIBCPP_TYPE_VIS x { \ |
| enum __lx |
| // clang-format off |
| # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ |
| __lx __v_; \ |
| _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ |
| _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ |
| _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \ |
| }; |
| // clang-format on |
| |
| # else // _LIBCPP_CXX03_LANG |
| # define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x |
| # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) |
| # endif // _LIBCPP_CXX03_LANG |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \ |
| defined(__NetBSD__) |
| # define _LIBCPP_LOCALE__L_EXTENSIONS 1 |
| # endif |
| |
| # ifdef __FreeBSD__ |
| # define _DECLARE_C99_LDBL_MATH 1 |
| # endif |
| |
| // If we are getting operator new from the MSVC CRT, then allocation overloads |
| // for align_val_t were added in 19.12, aka VS 2017 version 15.3. |
| # if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 |
| # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION |
| # elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) |
| // We're deferring to Microsoft's STL to provide aligned new et al. We don't |
| // have it unless the language feature test macro is defined. |
| # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION |
| # elif defined(__MVS__) |
| # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION |
| # endif |
| |
| # if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) |
| # define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION |
| # endif |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) |
| # define _LIBCPP_HAS_DEFAULTRUNELOCALE |
| # endif |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) |
| # define _LIBCPP_WCTYPE_IS_MASK |
| # endif |
| |
| # if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) |
| # define _LIBCPP_HAS_NO_CHAR8_T |
| # endif |
| |
| // Deprecation macros. |
| // |
| // Deprecations warnings are always enabled, except when users explicitly opt-out |
| // by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. |
| # if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) |
| # if __has_attribute(deprecated) |
| # define _LIBCPP_DEPRECATED __attribute__((deprecated)) |
| # define _LIBCPP_DEPRECATED_(m) __attribute__((deprected(m))) |
| # elif _LIBCPP_STD_VER > 11 |
| # define _LIBCPP_DEPRECATED [[deprecated]] |
| # define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] |
| # else |
| # define _LIBCPP_DEPRECATED |
| # define _LIBCPP_DEPRECATED_(m) |
| # endif |
| # else |
| # define _LIBCPP_DEPRECATED |
| # define _LIBCPP_DEPRECATED_(m) |
| # endif |
| |
| # if !defined(_LIBCPP_CXX03_LANG) |
| # define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX11 |
| # endif |
| |
| # if _LIBCPP_STD_VER > 11 |
| # define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX14 |
| # endif |
| |
| # if _LIBCPP_STD_VER > 14 |
| # define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX17 |
| # endif |
| |
| # if _LIBCPP_STD_VER > 17 |
| # define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX20 |
| # endif |
| |
| # if !defined(_LIBCPP_HAS_NO_CHAR8_T) |
| # define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_WITH_CHAR8_T |
| # endif |
| |
| // Macros to enter and leave a state where deprecation warnings are suppressed. |
| # if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ |
| _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ |
| _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") |
| # define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") |
| # else |
| # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH |
| # define _LIBCPP_SUPPRESS_DEPRECATED_POP |
| # endif |
| |
| # if _LIBCPP_STD_VER <= 11 |
| # define _LIBCPP_EXPLICIT_AFTER_CXX11 |
| # else |
| # define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit |
| # endif |
| |
| # if _LIBCPP_STD_VER > 11 |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| # endif |
| |
| # if _LIBCPP_STD_VER > 14 |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX14 |
| # endif |
| |
| # if _LIBCPP_STD_VER > 17 |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| # endif |
| |
| # if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) |
| # define _LIBCPP_NODISCARD [[nodiscard]] |
| # elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) |
| # define _LIBCPP_NODISCARD [[clang::warn_unused_result]] |
| # else |
| // We can't use GCC's [[gnu::warn_unused_result]] and |
| // __attribute__((warn_unused_result)), because GCC does not silence them via |
| // (void) cast. |
| # define _LIBCPP_NODISCARD |
| # endif |
| |
| // _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not |
| // specified as such as an extension. |
| # if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) |
| # define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD |
| # else |
| # define _LIBCPP_NODISCARD_EXT |
| # endif |
| |
| # if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) |
| # define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD |
| # else |
| # define _LIBCPP_NODISCARD_AFTER_CXX17 |
| # endif |
| |
| # if __has_attribute(no_destroy) |
| # define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) |
| # else |
| # define _LIBCPP_NO_DESTROY |
| # endif |
| |
| # ifndef _LIBCPP_HAS_NO_ASAN |
| extern "C" _LIBCPP_FUNC_VIS void |
| __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); |
| # endif |
| |
| // Try to find out if RTTI is disabled. |
| # if !defined(__cpp_rtti) || __cpp_rtti < 199711L |
| # define _LIBCPP_NO_RTTI |
| # endif |
| |
| # ifndef _LIBCPP_WEAK |
| # define _LIBCPP_WEAK __attribute__((__weak__)) |
| # endif |
| |
| // Thread API |
| // clang-format off |
| # if !defined(_LIBCPP_HAS_NO_THREADS) && \ |
| !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ |
| !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ |
| !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) |
| |
| # if defined(__FreeBSD__) || \ |
| defined(__wasi__) || \ |
| defined(__NetBSD__) || \ |
| defined(__OpenBSD__) || \ |
| defined(__NuttX__) || \ |
| defined(__linux__) || \ |
| defined(__GNU__) || \ |
| defined(__APPLE__) || \ |
| defined(__sun__) || \ |
| defined(__MVS__) || \ |
| defined(_AIX) || \ |
| defined(__EMSCRIPTEN__) |
| // clang-format on |
| # define _LIBCPP_HAS_THREAD_API_PTHREAD |
| # elif defined(__Fuchsia__) |
| // TODO(44575): Switch to C11 thread API when possible. |
| # define _LIBCPP_HAS_THREAD_API_PTHREAD |
| # elif defined(_LIBCPP_WIN32API) |
| # define _LIBCPP_HAS_THREAD_API_WIN32 |
| # else |
| # error "No thread API" |
| # endif // _LIBCPP_HAS_THREAD_API |
| # endif // _LIBCPP_HAS_NO_THREADS |
| |
| # if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) |
| # if defined(__ANDROID__) && __ANDROID_API__ >= 30 |
| # define _LIBCPP_HAS_COND_CLOCKWAIT |
| # elif defined(_LIBCPP_GLIBC_PREREQ) |
| # if _LIBCPP_GLIBC_PREREQ(2, 30) |
| # define _LIBCPP_HAS_COND_CLOCKWAIT |
| # endif |
| # endif |
| # endif |
| |
| # if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) |
| # error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ |
| _LIBCPP_HAS_NO_THREADS is not defined. |
| # endif |
| |
| # if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) |
| # error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ |
| _LIBCPP_HAS_NO_THREADS is defined. |
| # endif |
| |
| # if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) |
| # error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ |
| _LIBCPP_HAS_NO_THREADS is defined. |
| # endif |
| |
| # if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) |
| # define __STDCPP_THREADS__ 1 |
| # endif |
| |
| // The glibc and Bionic implementation of pthreads implements |
| // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 |
| // mutexes have no destroy mechanism. |
| // |
| // This optimization can't be performed on Apple platforms, where |
| // pthread_mutex_destroy can allow the kernel to release resources. |
| // See https://llvm.org/D64298 for details. |
| // |
| // TODO(EricWF): Enable this optimization on Bionic after speaking to their |
| // respective stakeholders. |
| // clang-format off |
| # if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ |
| (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ |
| defined(_LIBCPP_HAS_THREAD_API_WIN32) |
| // clang-format on |
| # define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION |
| # endif |
| |
| // Destroying a condvar is a nop on Windows. |
| // |
| // This optimization can't be performed on Apple platforms, where |
| // pthread_cond_destroy can allow the kernel to release resources. |
| // See https://llvm.org/D64298 for details. |
| // |
| // TODO(EricWF): This is potentially true for some pthread implementations |
| // as well. |
| # if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) |
| # define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION |
| # endif |
| |
| // Some systems do not provide gets() in their C library, for security reasons. |
| # if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) |
| # define _LIBCPP_C_HAS_NO_GETS |
| # endif |
| |
| # if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ |
| defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) |
| # define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE |
| # endif |
| |
| # if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) |
| # define _LIBCPP_HAS_C_ATOMIC_IMP |
| # elif defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_HAS_GCC_ATOMIC_IMP |
| # endif |
| |
| # if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ |
| !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) |
| # define _LIBCPP_HAS_NO_ATOMIC_HEADER |
| # else |
| # ifndef _LIBCPP_ATOMIC_FLAG_TYPE |
| # define _LIBCPP_ATOMIC_FLAG_TYPE bool |
| # endif |
| # ifdef _LIBCPP_FREESTANDING |
| # define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS |
| # endif |
| # endif |
| |
| # ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK |
| # define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK |
| # endif |
| |
| # if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) |
| # if defined(__clang__) && __has_attribute(acquire_capability) |
| // Work around the attribute handling in clang. When both __declspec and |
| // __attribute__ are present, the processing goes awry preventing the definition |
| // of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus |
| // combining the two does work. |
| # if !defined(_MSC_VER) |
| # define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS |
| # endif |
| # endif |
| # endif |
| |
| # ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS |
| # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) |
| # else |
| # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) |
| # endif |
| |
| # if _LIBCPP_STD_VER > 17 |
| # define _LIBCPP_CONSTINIT constinit |
| # elif __has_attribute(require_constant_initialization) |
| # define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) |
| # else |
| # define _LIBCPP_CONSTINIT |
| # endif |
| |
| # if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) |
| # define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((diagnose_if(__VA_ARGS__, "warning"))) |
| # define _LIBCPP_DIAGNOSE_ERROR(...) __attribute__((diagnose_if(__VA_ARGS__, "error"))) |
| # else |
| # define _LIBCPP_DIAGNOSE_WARNING(...) |
| # define _LIBCPP_DIAGNOSE_ERROR(...) |
| # endif |
| |
| // Use a function like macro to imply that it must be followed by a semicolon |
| # if __has_cpp_attribute(fallthrough) |
| # define _LIBCPP_FALLTHROUGH() [[fallthrough]] |
| # elif __has_attribute(__fallthrough__) |
| # define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) |
| # else |
| # define _LIBCPP_FALLTHROUGH() ((void)0) |
| # endif |
| |
| # if __has_attribute(__nodebug__) |
| # define _LIBCPP_NODEBUG __attribute__((__nodebug__)) |
| # else |
| # define _LIBCPP_NODEBUG |
| # endif |
| |
| # if __has_attribute(__standalone_debug__) |
| # define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) |
| # else |
| # define _LIBCPP_STANDALONE_DEBUG |
| # endif |
| |
| # if __has_attribute(__preferred_name__) |
| # define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) |
| # else |
| # define _LIBCPP_PREFERRED_NAME(x) |
| # endif |
| |
| // We often repeat things just for handling wide characters in the library. |
| // When wide characters are disabled, it can be useful to have a quick way of |
| // disabling it without having to resort to #if-#endif, which has a larger |
| // impact on readability. |
| # if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) |
| # define _LIBCPP_IF_WIDE_CHARACTERS(...) |
| # else |
| # define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ |
| # endif |
| |
| # if defined(_LIBCPP_ABI_MICROSOFT) && (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) |
| # define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) |
| # else |
| # define _LIBCPP_DECLSPEC_EMPTY_BASES |
| # endif |
| |
| # if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) |
| # define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR |
| # define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS |
| # define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE |
| # define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS |
| # endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES |
| |
| # if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR |
| # define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS |
| # endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES |
| |
| # if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L |
| # define _LIBCPP_HAS_NO_CXX20_COROUTINES |
| # endif |
| |
| # define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") |
| # define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") |
| |
| #if defined(_LIBCPP_NO_DEBUG_INFO) |
| # define _LIBCPP_DISABLE_DEBUG_INFO _Pragma("clang attribute push([[gnu::nodebug]], apply_to = any(type_alias, hasType(functionType)))") |
| # define _LIBCPP_ENABLE_DEBUG_INFO _Pragma("clang attribute pop") |
| #else |
| # define _LIBCPP_DISABLE_DEBUG_INFO |
| # define _LIBCPP_ENABLE_DEBUG_INFO |
| #endif |
| |
| # ifndef _LIBCPP_NO_AUTO_LINK |
| # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # pragma comment(lib, "c++.lib") |
| # else |
| # pragma comment(lib, "libc++.lib") |
| # endif |
| # endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) |
| # endif // _LIBCPP_NO_AUTO_LINK |
| |
| // Configures the fopen close-on-exec mode character, if any. This string will |
| // be appended to any mode string used by fstream for fopen/fdopen. |
| // |
| // Not all platforms support this, but it helps avoid fd-leaks on platforms that |
| // do. |
| # if defined(__BIONIC__) |
| # define _LIBCPP_FOPEN_CLOEXEC_MODE "e" |
| # else |
| # define _LIBCPP_FOPEN_CLOEXEC_MODE |
| # endif |
| |
| // Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set |
| // of functions used in cstdio may not be available for low API levels when |
| // using 64-bit file offsets on LP32. |
| # if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 |
| # define _LIBCPP_HAS_NO_FGETPOS_FSETPOS |
| # endif |
| |
| # if __has_attribute(init_priority) |
| // TODO: Remove this once we drop support for building libc++ with old Clangs |
| # if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ |
| (defined(__apple_build_version__) && __apple_build_version__ < 13000000) |
| # define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) |
| # else |
| # define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) |
| # endif |
| # else |
| # define _LIBCPP_INIT_PRIORITY_MAX |
| # endif |
| |
| # if defined(__GNUC__) || defined(__clang__) |
| // The attribute uses 1-based indices for ordinary and static member functions. |
| // The attribute uses 2-based indices for non-static member functions. |
| # define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ |
| __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) |
| # else |
| # define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ |
| # endif |
| |
| # if __has_cpp_attribute(msvc::no_unique_address) |
| // MSVC implements [[no_unique_address]] as a silent no-op currently. |
| // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) |
| // However, MSVC implements [[msvc::no_unique_address]] which does what |
| // [[no_unique_address]] is supposed to do, in general. |
| |
| // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or |
| // [[msvc::no_unique_address]] though. If/when it does implement |
| // [[msvc::no_unique_address]], this should be preferred though. |
| # define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] |
| # elif __has_cpp_attribute(no_unique_address) |
| # define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] |
| # else |
| # define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ |
| // Note that this can be replaced by #error as soon as clang-cl |
| // implements msvc::no_unique_address, since there should be no C++20 |
| // compiler that doesn't support one of the two attributes at that point. |
| // We generally don't want to use this macro outside of C++20-only code, |
| // because using it conditionally in one language version only would make |
| // the ABI inconsistent. |
| # endif |
| |
| # ifdef _LIBCPP_COMPILER_CLANG_BASED |
| # define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") |
| # define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") |
| # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) |
| # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) |
| # elif defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") |
| # define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") |
| # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) |
| # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) |
| # else |
| # define _LIBCPP_DIAGNOSTIC_PUSH |
| # define _LIBCPP_DIAGNOSTIC_POP |
| # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) |
| # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) |
| # endif |
| |
| # if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") |
| # define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") |
| # else |
| # define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ |
| # define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ |
| # endif |
| |
| #endif // __cplusplus |
| |
| #endif // _LIBCPP___CONFIG |
