| // -*- 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> |
| |
| #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER |
| # pragma GCC system_header |
| #endif |
| |
| #if defined(__apple_build_version__) |
| // Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) |
| # 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 |
| # define _LIBCPP_GCC_VER (__GNUC__ * 100 + __GNUC_MINOR__) |
| #endif |
| |
| #ifdef __cplusplus |
| |
| // Warn if a compiler version is used that is not supported anymore |
| // LLVM RELEASE Update the minimum compiler versions |
| # if defined(_LIBCPP_CLANG_VER) |
| # if _LIBCPP_CLANG_VER < 1700 |
| # warning "Libc++ only supports Clang 17 and later" |
| # endif |
| # elif defined(_LIBCPP_APPLE_CLANG_VER) |
| # if _LIBCPP_APPLE_CLANG_VER < 1500 |
| # warning "Libc++ only supports AppleClang 15 and later" |
| # endif |
| # elif defined(_LIBCPP_GCC_VER) |
| # if _LIBCPP_GCC_VER < 1300 |
| # warning "Libc++ only supports GCC 13 and later" |
| # endif |
| # endif |
| |
| // The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html |
| |
| // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. |
| // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is |
| // defined to XXYYZZ. |
| # define _LIBCPP_VERSION 190000 |
| |
| # define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y |
| # define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) |
| |
| # if __STDC_HOSTED__ == 0 |
| # define _LIBCPP_FREESTANDING |
| # endif |
| |
| // NOLINTBEGIN(libcpp-cpp-version-check) |
| # 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 |
| # elif __cplusplus <= 202302L |
| # define _LIBCPP_STD_VER 23 |
| # else |
| // Expected release year of the next C++ standard |
| # define _LIBCPP_STD_VER 26 |
| # endif |
| # endif // _LIBCPP_STD_VER |
| // NOLINTEND(libcpp-cpp-version-check) |
| |
| # 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 |
| |
| // ABI { |
| |
| # 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 |
| // 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 on platforms that sign and authenticate vtable function pointers |
| // because it changes the mangling of the virtual function located in the vtable, which |
| // changes how it gets signed. |
| # 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 |
| // 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 |
| // 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 |
| // Fix the implementation of CityHash used for std::hash<fundamental-type>. |
| // This is an ABI break because `std::hash` will return a different result, |
| // which means that hashing the same object in translation units built against |
| // different versions of libc++ can return inconsistent results. This is especially |
| // tricky since std::hash is used in the implementation of unordered containers. |
| // |
| // The incorrect implementation of CityHash has the problem that it drops some |
| // bits on the floor. |
| # define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION |
| // 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 |
| // Define std::array/std::string_view iterators to be __wrap_iters instead of raw |
| // pointers, which prevents people from relying on a non-portable implementation |
| // detail. This is especially useful because enabling bounded iterators hardening |
| // requires code not to make these assumptions. |
| # define _LIBCPP_ABI_USE_WRAP_ITER_IN_STD_ARRAY |
| # define _LIBCPP_ABI_USE_WRAP_ITER_IN_STD_STRING_VIEW |
| # 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__) && __FreeBSD__ < 14 |
| # define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR |
| # endif |
| # endif |
| |
| // We had some bugs where we use [[no_unique_address]] together with construct_at, |
| // which causes UB as the call on construct_at could write to overlapping subobjects |
| // |
| // https://github.com/llvm/llvm-project/issues/70506 |
| // https://github.com/llvm/llvm-project/issues/70494 |
| // |
| // To fix the bug we had to change the ABI of some classes to remove [[no_unique_address]] under certain conditions. |
| // The macro below is used for all classes whose ABI have changed as part of fixing these bugs. |
| # define _LIBCPP_ABI_LLVM18_NO_UNIQUE_ADDRESS __attribute__((__abi_tag__("llvm18_nua"))) |
| |
| // Changes the iterator type of select containers (see below) to a bounded iterator that keeps track of whether it's |
| // within the bounds of the original container and asserts it on every dereference. |
| // |
| // ABI impact: changes the iterator type of the relevant containers. |
| // |
| // Supported containers: |
| // - `span`; |
| // - `string_view`; |
| // - `array`. |
| // #define _LIBCPP_ABI_BOUNDED_ITERATORS |
| |
| // } ABI |
| |
| // HARDENING { |
| |
| // TODO(hardening): deprecate this in LLVM 19. |
| // This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes) |
| // equivalent to setting the extensive mode. |
| # ifdef _LIBCPP_ENABLE_ASSERTIONS |
| # if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 |
| # error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" |
| # endif |
| # if _LIBCPP_ENABLE_ASSERTIONS |
| # define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_EXTENSIVE |
| # endif |
| # endif |
| |
| // The library provides the macro `_LIBCPP_HARDENING_MODE` which can be set to one of the following values: |
| // |
| // - `_LIBCPP_HARDENING_MODE_NONE`; |
| // - `_LIBCPP_HARDENING_MODE_FAST`; |
| // - `_LIBCPP_HARDENING_MODE_EXTENSIVE`; |
| // - `_LIBCPP_HARDENING_MODE_DEBUG`. |
| // |
| // These values have the following effects: |
| // |
| // - `_LIBCPP_HARDENING_MODE_NONE` -- sets the hardening mode to "none" which disables all runtime hardening checks; |
| // |
| // - `_LIBCPP_HARDENING_MODE_FAST` -- sets that hardening mode to "fast". The fast mode enables security-critical checks |
| // that can be done with relatively little runtime overhead in constant time; |
| // |
| // - `_LIBCPP_HARDENING_MODE_EXTENSIVE` -- sets the hardening mode to "extensive". The extensive mode is a superset of |
| // the fast mode that additionally enables checks that are relatively cheap and prevent common types of logic errors |
| // but are not necessarily security-critical; |
| // |
| // - `_LIBCPP_HARDENING_MODE_DEBUG` -- sets the hardening mode to "debug". The debug mode is a superset of the extensive |
| // mode and enables all checks available in the library, including internal assertions. Checks that are part of the |
| // debug mode can be very expensive and thus the debug mode is intended to be used for testing, not in production. |
| |
| // Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These |
| // macros are only for internal use -- users should only pick one of the high-level hardening modes described above. |
| // |
| // - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and |
| // a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: |
| // - the sentinel is reachable from the begin iterator; |
| // - TODO(hardening): both iterators refer to the same container. |
| // |
| // - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through |
| // the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access |
| // a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like |
| // `optional` and `function` are considered one-element containers for the purposes of this check. |
| // |
| // - `_LIBCPP_ASSERT_NON_NULL` -- checks that the pointer being dereferenced is not null. On most modern platforms zero |
| // address does not refer to an actual location in memory, so a null pointer dereference would not compromize the |
| // memory security of a program (however, it is still undefined behavior that can result in strange errors due to |
| // compiler optimizations). |
| // |
| // - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the |
| // given ranges do not overlap. |
| // |
| // - `_LIBCPP_ASSERT_VALID_DEALLOCATION` -- checks that an attempt to deallocate memory is valid (e.g. the given object |
| // was allocated by the given allocator). Violating this category typically results in a memory leak. |
| // |
| // - `_LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL` -- checks that a call to an external API doesn't fail in |
| // an unexpected manner. This includes triggering documented cases of undefined behavior in an external library (like |
| // attempting to unlock an unlocked mutex in pthreads). Any API external to the library falls under this category |
| // (from system calls to compiler intrinsics). We generally don't expect these failures to compromize memory safety or |
| // otherwise create an immediate security issue. |
| // |
| // - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure |
| // the containers have compatible allocators. |
| // |
| // - `_LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN` -- checks that the given argument is within the domain of valid arguments |
| // for the function. Violating this typically produces an incorrect result (e.g. the clamp algorithm returns the |
| // original value without clamping it due to incorrect functors) or puts an object into an invalid state (e.g. |
| // a string view where only a subset of elements is possible to access). This category is for assertions violating |
| // which doesn't cause any immediate issues in the library -- whatever the consequences are, they will happen in the |
| // user code. |
| // |
| // - `_LIBCPP_ASSERT_PEDANTIC` -- checks prerequisites which are imposed by the Standard, but violating which happens to |
| // be benign in our implementation. |
| // |
| // - `_LIBCPP_ASSERT_SEMANTIC_REQUIREMENT` -- checks that the given argument satisfies the semantic requirements imposed |
| // by the Standard. Typically, there is no simple way to completely prove that a semantic requirement is satisfied; |
| // thus, this would often be a heuristic check and it might be quite expensive. |
| // |
| // - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on |
| // user input. |
| // |
| // - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. |
| |
| // clang-format off |
| # define _LIBCPP_HARDENING_MODE_NONE (1 << 1) |
| # define _LIBCPP_HARDENING_MODE_FAST (1 << 2) |
| # define _LIBCPP_HARDENING_MODE_EXTENSIVE (1 << 4) // Deliberately not ordered. |
| # define _LIBCPP_HARDENING_MODE_DEBUG (1 << 3) |
| // clang-format on |
| |
| # ifndef _LIBCPP_HARDENING_MODE |
| |
| # ifndef _LIBCPP_HARDENING_MODE_DEFAULT |
| # error _LIBCPP_HARDENING_MODE_DEFAULT is not defined. This definition should be set at configuration time in the \ |
| `__config_site` header, please make sure your installation of libc++ is not broken. |
| # endif |
| |
| # define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_DEFAULT |
| # endif |
| |
| # if _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_NONE && \ |
| _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_FAST && \ |
| _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_EXTENSIVE && \ |
| _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_DEBUG |
| # error _LIBCPP_HARDENING_MODE must be set to one of the following values: \ |
| _LIBCPP_HARDENING_MODE_NONE, \ |
| _LIBCPP_HARDENING_MODE_FAST, \ |
| _LIBCPP_HARDENING_MODE_EXTENSIVE, \ |
| _LIBCPP_HARDENING_MODE_DEBUG |
| # endif |
| |
| // } HARDENING |
| |
| # define _LIBCPP_TOSTRING2(x) #x |
| # define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) |
| |
| // NOLINTNEXTLINE(libcpp-cpp-version-check) |
| # if __cplusplus < 201103L |
| # define _LIBCPP_CXX03_LANG |
| # endif |
| |
| // TODO: Remove once we switch to GCC 14 |
| # ifndef __has_extension |
| # define __has_extension(__x) 0 |
| # endif |
| |
| // TODO: Remove once we switch to GCC 14 |
| # ifndef __has_feature |
| # define __has_feature(__x) 0 |
| # endif |
| |
| # ifndef __has_constexpr_builtin |
| # define __has_constexpr_builtin(x) 0 |
| # endif |
| |
| // This checks wheter a Clang module is built |
| # ifndef __building_module |
| # define __building_module(...) 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_warning |
| # define __has_warning(...) 0 |
| # 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 |
| |
| # if __has_feature(experimental_library) |
| # ifndef _LIBCPP_ENABLE_EXPERIMENTAL |
| # define _LIBCPP_ENABLE_EXPERIMENTAL |
| # endif |
| # endif |
| |
| // Incomplete features get their own specific disabling flags. This makes it |
| // easier to grep for target specific flags once the feature is complete. |
| # if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) |
| # define _LIBCPP_HAS_NO_INCOMPLETE_PSTL |
| # define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN |
| # define _LIBCPP_HAS_NO_EXPERIMENTAL_TZDB |
| # define _LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM |
| # 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 |
| |
| # ifndef __BYTE_ORDER__ |
| # error \ |
| "Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform" |
| # endif |
| |
| # 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__ |
| |
| # if defined(_WIN32) |
| # define _LIBCPP_WIN32API |
| # 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) |
| |
| # 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__) |
| # 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 |
| |
| # 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_(...) noexcept(__VA_ARGS__) |
| # define _LIBCPP_CONSTEXPR constexpr |
| |
| # 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_(...) |
| # define static_assert(...) _Static_assert(__VA_ARGS__) |
| # define decltype(...) __decltype(__VA_ARGS__) |
| # define _LIBCPP_CONSTEXPR |
| |
| typedef __char16_t char16_t; |
| typedef __char32_t char32_t; |
| |
| # endif |
| |
| # if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L |
| # define _LIBCPP_HAS_NO_EXCEPTIONS |
| # endif |
| |
| # define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) |
| |
| # if defined(_LIBCPP_COMPILER_CLANG_BASED) |
| |
| # if defined(__APPLE__) |
| # if defined(__i386__) || defined(__x86_64__) |
| // use old string layout on x86_64 and i386 |
| # elif defined(__arm__) |
| // use old string layout on arm (which does not include aarch64/arm64), except on watch ABIs |
| # if defined(__ARM_ARCH_7K__) && __ARM_ARCH_7K__ >= 2 |
| # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT |
| # endif |
| # else |
| # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT |
| # endif |
| # 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 |
| |
| # 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__ |
| |
| # endif // _LIBCPP_COMPILER_[CLANG|GCC] |
| |
| # 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_HIDDEN |
| # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS |
| # define _LIBCPP_TEMPLATE_VIS |
| # define _LIBCPP_TEMPLATE_DATA_VIS |
| # define _LIBCPP_TYPE_VISIBILITY_DEFAULT |
| |
| # else |
| |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) |
| # define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) |
| # else |
| # define _LIBCPP_VISIBILITY(vis) |
| # endif |
| |
| # define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") |
| # define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") |
| # define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") |
| # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") |
| # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS |
| |
| // TODO: Make this a proper customization point or remove the option to override it. |
| # ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS |
| # define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") |
| # endif |
| |
| # 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 |
| |
| // GCC doesn't support the type_visibility attribute, so we have to keep the visibility attribute on templates |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__) |
| # define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) |
| # else |
| # define _LIBCPP_TEMPLATE_VIS |
| # endif |
| |
| # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) |
| # define _LIBCPP_TYPE_VISIBILITY_DEFAULT __attribute__((__type_visibility__("default"))) |
| # else |
| # define _LIBCPP_TYPE_VISIBILITY_DEFAULT |
| # endif |
| |
| # endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) |
| |
| # 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 |
| |
| # 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 _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST |
| # define _LIBCPP_HARDENING_SIG f |
| # elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE |
| # define _LIBCPP_HARDENING_SIG s |
| # elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG |
| # define _LIBCPP_HARDENING_SIG d |
| # else |
| # define _LIBCPP_HARDENING_SIG n // "none" |
| # endif |
| |
| # ifdef _LIBCPP_HAS_NO_EXCEPTIONS |
| # define _LIBCPP_EXCEPTIONS_SIG n |
| # else |
| # define _LIBCPP_EXCEPTIONS_SIG e |
| # endif |
| |
| # define _LIBCPP_ODR_SIGNATURE \ |
| _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_EXCEPTIONS_SIG), _LIBCPP_VERSION) |
| |
| // This macro marks a symbol as being hidden from libc++'s ABI. This is achieved |
| // on two levels: |
| // 1. The symbol is given hidden visibility, which ensures that users won't start exporting |
| // symbols from their dynamic library by means of using the libc++ headers. This ensures |
| // that those symbols stay private to the dynamic library in which it is defined. |
| // |
| // 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. |
| // This ensures that no ODR violation can arise from mixing two TUs compiled with different |
| // versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the |
| // program contains two definitions of a function, the ODR requires them to be token-by-token |
| // equivalent, and the linker is allowed to pick either definition and discard the other one. |
| // |
| // For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled |
| // *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs |
| // compiled with different settings), the two definitions are both visible by the linker and they |
| // have the same name, but they have a meaningfully different implementation (one throws an exception |
| // and the other aborts the program). This violates the ODR and makes the program ill-formed, and in |
| // practice what will happen is that the linker will pick one of the definitions at random and will |
| // discard the other one. This can quite clearly lead to incorrect program behavior. |
| // |
| // A similar reasoning holds for many other properties that are ODR-affecting. Essentially any |
| // property that causes the code of a function to differ from the code in another configuration |
| // can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI |
| // tag, but we encode the ones that we think are most important: library version, exceptions, and |
| // hardening mode. |
| // |
| // Note that historically, solving this problem has been achieved in various ways, including |
| // force-inlining all functions or giving internal linkage to all functions. Both these previous |
| // solutions suffer from drawbacks that lead notably to code bloat. |
| // |
| // Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend |
| // on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. |
| // |
| // Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions |
| // instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled |
| // name of a virtual function is part of its ABI, since some architectures like arm64e can sign |
| // the virtual function pointer in the vtable based on the mangled name of the function. Since |
| // we use an ABI tag that changes with each released version, the mangled name of the virtual |
| // function would change, which is incorrect. Note that it doesn't make much sense to change |
| // the implementation of a virtual function in an ABI-incompatible way in the first place, |
| // since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. |
| // |
| // The macro can be applied to record and enum types. When the tagged type is nested in |
| // a record this "parent" record needs to have the macro too. Another use case for applying |
| // this macro to records and unions is to apply an ABI tag to inline constexpr variables. |
| // This can be useful for inline variables that are implementation details which are expected |
| // to change in the future. |
| // |
| // TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing |
| // the length of symbols with an ABI tag. In practice, we should remove the escape hatch and |
| // use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. |
| # ifndef _LIBCPP_NO_ABI_TAG |
| # define _LIBCPP_HIDE_FROM_ABI \ |
| _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ |
| __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE)))) |
| # else |
| # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION |
| # endif |
| # define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION |
| |
| // This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern |
| // "C" function, as those lack mangling. |
| # define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION |
| |
| # 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 |
| |
| // TODO: Remove this workaround once we drop support for Clang 16 |
| #if __has_warning("-Wc++23-extensions") |
| # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++23-extensions") |
| #else |
| # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++2b-extensions") |
| #endif |
| |
| // Clang modules take a significant compile time hit when pushing and popping diagnostics. |
| // Since all the headers are marked as system headers in the modulemap, we can simply disable this |
| // pushing and popping when building with clang modules. |
| # if !__has_feature(modules) |
| # define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \ |
| _LIBCPP_DIAGNOSTIC_PUSH \ |
| _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++11-extensions") \ |
| _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \ |
| _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \ |
| _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \ |
| _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION \ |
| _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \ |
| _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \ |
| _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \ |
| _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++23-extensions") |
| # define _LIBCPP_POP_EXTENSION_DIAGNOSTICS _LIBCPP_DIAGNOSTIC_POP |
| # else |
| # define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS |
| # define _LIBCPP_POP_EXTENSION_DIAGNOSTICS |
| # endif |
| |
| // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. |
| // clang-format off |
| # define _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \ |
| namespace _LIBCPP_TYPE_VISIBILITY_DEFAULT std { \ |
| inline namespace _LIBCPP_ABI_NAMESPACE { |
| # define _LIBCPP_END_NAMESPACE_STD }} _LIBCPP_POP_EXTENSION_DIAGNOSTICS |
| |
| # define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \ |
| inline namespace __fs { namespace filesystem { |
| |
| # define _LIBCPP_END_NAMESPACE_FILESYSTEM }} _LIBCPP_END_NAMESPACE_STD |
| // clang-format on |
| |
| # if __has_attribute(__enable_if__) |
| # define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) |
| # endif |
| |
| # if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) |
| # define _LIBCPP_HAS_NO_INT128 |
| # endif |
| |
| # ifdef _LIBCPP_CXX03_LANG |
| # define _LIBCPP_DECLARE_STRONG_ENUM(x) \ |
| struct _LIBCPP_EXPORTED_FROM_ABI x { \ |
| enum __lx |
| // clang-format off |
| # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ |
| __lx __v_; \ |
| _LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \ |
| _LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ |
| _LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \ |
| }; |
| // clang-format on |
| |
| # else // _LIBCPP_CXX03_LANG |
| # define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x |
| # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) |
| # endif // _LIBCPP_CXX03_LANG |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || 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 |
| |
| // It is not yet possible to use aligned_alloc() on all Apple platforms since |
| // 10.15 was the first version to ship an implementation of aligned_alloc(). |
| # if defined(__APPLE__) |
| # if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ |
| __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) |
| # define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC |
| # endif |
| # elif defined(__ANDROID__) && __ANDROID_API__ < 28 |
| // Android only provides aligned_alloc when targeting API 28 or higher. |
| # define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC |
| # endif |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) |
| # define _LIBCPP_HAS_DEFAULTRUNELOCALE |
| # endif |
| |
| # if defined(__APPLE__) || defined(__FreeBSD__) |
| # 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__((__deprecated__(m))) |
| # elif _LIBCPP_STD_VER >= 14 |
| # 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 _LIBCPP_STD_VER < 20 |
| # define _LIBCPP_DEPRECATED_ATOMIC_SYNC \ |
| _LIBCPP_DEPRECATED_("The C++20 synchronization library has been deprecated prior to C++20. Please update to " \ |
| "using -std=c++20 if you need to use these facilities.") |
| # else |
| # define _LIBCPP_DEPRECATED_ATOMIC_SYNC /* nothing */ |
| # endif |
| |
| # if !defined(_LIBCPP_CXX03_LANG) |
| # define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX11 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 14 |
| # define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX14 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 17 |
| # define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX17 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 20 |
| # define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX20 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 23 |
| # define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX23 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 26 |
| # define _LIBCPP_DEPRECATED_IN_CXX26 _LIBCPP_DEPRECATED |
| # else |
| # define _LIBCPP_DEPRECATED_IN_CXX26 |
| # 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_SINCE_CXX14 |
| # else |
| # define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 23 |
| # define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit |
| # else |
| # define _LIBCPP_EXPLICIT_SINCE_CXX23 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 14 |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 17 |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX17 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 20 |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX20 |
| # endif |
| |
| # if _LIBCPP_STD_VER >= 23 |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr |
| # else |
| # define _LIBCPP_CONSTEXPR_SINCE_CXX23 |
| # endif |
| |
| // Try to find out if RTTI is disabled. |
| # if !defined(__cpp_rtti) || __cpp_rtti < 199711L |
| # define _LIBCPP_HAS_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(__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 |
| |
| # 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 |
| # endif |
| |
| # if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) |
| # define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__)) |
| # else |
| # define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS |
| # 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 >= 20 |
| # define _LIBCPP_CONSTINIT constinit |
| # elif __has_attribute(__require_constant_initialization__) |
| # define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) |
| # else |
| # define _LIBCPP_CONSTINIT |
| # endif |
| |
| # if defined(__CUDACC__) || defined(__CUDA_ARCH__) || defined(__CUDA_LIBDEVICE__) |
| // The CUDA SDK contains an unfortunate definition for the __noinline__ macro, |
| // which breaks the regular __attribute__((__noinline__)) syntax. Therefore, |
| // when compiling for CUDA we use the non-underscored version of the noinline |
| // attribute. |
| // |
| // This is a temporary workaround and we still expect the CUDA SDK team to solve |
| // this issue properly in the SDK headers. |
| // |
| // See https://github.com/llvm/llvm-project/pull/73838 for more details. |
| # define _LIBCPP_NOINLINE __attribute__((noinline)) |
| # elif __has_attribute(__noinline__) |
| # define _LIBCPP_NOINLINE __attribute__((__noinline__)) |
| # else |
| # define _LIBCPP_NOINLINE |
| # 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 |
| |
| // clang-format off |
| # define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")") |
| # define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")") |
| // clang-format on |
| |
| # 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 |
| |
| # 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 |
| |
| // c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these |
| // functions is gradually being added to existing C libraries. The conditions |
| // below check for known C library versions and conditions under which these |
| // functions are declared by the C library. |
| # define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 |
| // GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if |
| // __cpp_char8_t is defined or if C2X extensions are enabled. Determining |
| // the latter depends on internal GNU libc details that are not appropriate |
| // to depend on here, so any declarations present when __cpp_char8_t is not |
| // defined are ignored. |
| # if defined(_LIBCPP_GLIBC_PREREQ) |
| # if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) |
| # undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 |
| # endif |
| # endif |
| |
| // There are a handful of public standard library types that are intended to |
| // support CTAD but don't need any explicit deduction guides to do so. This |
| // macro is used to mark them as such, which suppresses the |
| // '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code |
| // with these classes. |
| # if _LIBCPP_STD_VER >= 17 |
| # ifdef _LIBCPP_COMPILER_CLANG_BASED |
| # define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \ |
| template <class... _Tag> \ |
| [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...> |
| # else |
| # define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \ |
| template <class... _Tag> \ |
| ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...> |
| # endif |
| # else |
| # define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") |
| # endif |
| |
| // TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use |
| // compiler intrinsics in the Objective-C++ mode. |
| # ifdef __OBJC__ |
| # define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS |
| # endif |
| |
| # define _PSTL_PRAGMA(x) _Pragma(#x) |
| |
| // Enable SIMD for compilers that support OpenMP 4.0 |
| # if (defined(_OPENMP) && _OPENMP >= 201307) |
| |
| # define _PSTL_UDR_PRESENT |
| # define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd) |
| # define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd) |
| # define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM)) |
| # define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM)) |
| # define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM)) |
| # define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM)) |
| |
| // Declaration of reduction functor, where |
| // NAME - the name of the functor |
| // OP - type of the callable object with the reduction operation |
| // omp_in - refers to the local partial result |
| // omp_out - refers to the final value of the combiner operator |
| // omp_priv - refers to the private copy of the initial value |
| // omp_orig - refers to the original variable to be reduced |
| # define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \ |
| _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig)) |
| |
| # elif defined(_LIBCPP_COMPILER_CLANG_BASED) |
| |
| # define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)") |
| # define _PSTL_PRAGMA_DECLARE_SIMD |
| # define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") |
| # define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") |
| # define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) |
| # define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) |
| # define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) |
| |
| # else // (defined(_OPENMP) && _OPENMP >= 201307) |
| |
| # define _PSTL_PRAGMA_SIMD |
| # define _PSTL_PRAGMA_DECLARE_SIMD |
| # define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) |
| # define _PSTL_PRAGMA_SIMD_SCAN(PRM) |
| # define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) |
| # define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) |
| # define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) |
| |
| # endif // (defined(_OPENMP) && _OPENMP >= 201307) |
| |
| # define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED |
| |
| // Optional attributes - these are useful for a better QoI, but not required to be available |
| |
| # if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) |
| # else |
| # define _LIBCPP_NO_CFI |
| # endif |
| |
| # if __has_attribute(__malloc__) |
| # 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 |
| |
| # if __has_cpp_attribute(__nodiscard__) |
| # define _LIBCPP_NODISCARD [[__nodiscard__]] |
| # 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 |
| |
| # if __has_attribute(__no_destroy__) |
| # define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) |
| # else |
| # define _LIBCPP_NO_DESTROY |
| # endif |
| |
| # if __has_attribute(__diagnose_if__) |
| # define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning"))) |
| # else |
| # define _LIBCPP_DIAGNOSE_WARNING(...) |
| # 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_cpp_attribute(_Clang::__lifetimebound__) |
| # define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]] |
| # else |
| # define _LIBCPP_LIFETIMEBOUND |
| # 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 |
| |
| # if __has_attribute(__no_sanitize__) |
| # define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__))) |
| # else |
| # define _LIBCPP_NO_SANITIZE(...) |
| # endif |
| |
| # if __has_attribute(__init_priority__) |
| # define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100))) |
| # else |
| # define _LIBCPP_INIT_PRIORITY_MAX |
| # endif |
| |
| # if __has_attribute(__format__) |
| // 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_attribute(__packed__) |
| # define _LIBCPP_PACKED __attribute__((__packed__)) |
| # else |
| # define _LIBCPP_PACKED |
| # endif |
| |
| # if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) |
| # define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) |
| # else |
| # define _LIBCPP_DECLSPEC_EMPTY_BASES |
| # endif |
| |
| // Allow for build-time disabling of unsigned integer sanitization |
| # if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC) |
| # define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) |
| # else |
| # define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK |
| # endif |
| |
| // Clang-18 has support for deducing this, but it does not set the FTM. |
| # if defined(__cpp_explicit_this_parameter) || (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1800) |
| # define _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER |
| # endif |
| |
| #endif // __cplusplus |
| |
| #endif // _LIBCPP___CONFIG |
