1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___CONFIG 11#define _LIBCPP___CONFIG 12 13#include <__config_site> 14 15#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 16# pragma GCC system_header 17#endif 18 19#if defined(__apple_build_version__) 20// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) 21# define _LIBCPP_COMPILER_CLANG_BASED 22# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 23#elif defined(__clang__) 24# define _LIBCPP_COMPILER_CLANG_BASED 25# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 26#elif defined(__GNUC__) 27# define _LIBCPP_COMPILER_GCC 28# define _LIBCPP_GCC_VER (__GNUC__ * 100 + __GNUC_MINOR__) 29#endif 30 31#ifdef __cplusplus 32 33// Warn if a compiler version is used that is not supported anymore 34// LLVM RELEASE Update the minimum compiler versions 35#if defined(_LIBCPP_ENABLE_COMPILER_VERSION_CHECKS) // FreeBSD customization 36# if defined(_LIBCPP_CLANG_VER) 37# if _LIBCPP_CLANG_VER < 1600 38# warning "Libc++ only supports Clang 16 and later" 39# endif 40# elif defined(_LIBCPP_APPLE_CLANG_VER) 41# if _LIBCPP_APPLE_CLANG_VER < 1500 42# warning "Libc++ only supports AppleClang 15 and later" 43# endif 44# elif defined(_LIBCPP_GCC_VER) 45# if _LIBCPP_GCC_VER < 1300 46# warning "Libc++ only supports GCC 13 and later" 47# endif 48# endif 49#endif // _LIBCPP_ENABLE_COMPILER_VERSION_CHECKS 50 51// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html 52 53// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. 54// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is 55// defined to XXYYZZ. 56# define _LIBCPP_VERSION 180000 57 58# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 59# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 60 61# if __STDC_HOSTED__ == 0 62# define _LIBCPP_FREESTANDING 63# endif 64 65// NOLINTBEGIN(libcpp-cpp-version-check) 66# ifndef _LIBCPP_STD_VER 67# if __cplusplus <= 201103L 68# define _LIBCPP_STD_VER 11 69# elif __cplusplus <= 201402L 70# define _LIBCPP_STD_VER 14 71# elif __cplusplus <= 201703L 72# define _LIBCPP_STD_VER 17 73# elif __cplusplus <= 202002L 74# define _LIBCPP_STD_VER 20 75# elif __cplusplus <= 202302L 76# define _LIBCPP_STD_VER 23 77# else 78// Expected release year of the next C++ standard 79# define _LIBCPP_STD_VER 26 80# endif 81# endif // _LIBCPP_STD_VER 82// NOLINTEND(libcpp-cpp-version-check) 83 84# if defined(__ELF__) 85# define _LIBCPP_OBJECT_FORMAT_ELF 1 86# elif defined(__MACH__) 87# define _LIBCPP_OBJECT_FORMAT_MACHO 1 88# elif defined(_WIN32) 89# define _LIBCPP_OBJECT_FORMAT_COFF 1 90# elif defined(__wasm__) 91# define _LIBCPP_OBJECT_FORMAT_WASM 1 92# elif defined(_AIX) 93# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 94# else 95// ... add new file formats here ... 96# endif 97 98// ABI { 99 100# if _LIBCPP_ABI_VERSION >= 2 101// Change short string representation so that string data starts at offset 0, 102// improving its alignment in some cases. 103# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 104// Fix deque iterator type in order to support incomplete types. 105# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 106// Fix undefined behavior in how std::list stores its linked nodes. 107# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 108// Fix undefined behavior in how __tree stores its end and parent nodes. 109# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 110// Fix undefined behavior in how __hash_table stores its pointer types. 111# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 112# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 113# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 114// Define a key function for `bad_function_call` in the library, to centralize 115// its vtable and typeinfo to libc++ rather than having all other libraries 116// using that class define their own copies. 117# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 118// Override the default return value of exception::what() for 119// bad_function_call::what() with a string that is specific to 120// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 121// because it changes the vtable layout of bad_function_call. 122# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 123// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 124# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 125// Give reverse_iterator<T> one data member of type T, not two. 126// Also, in C++17 and later, don't derive iterator types from std::iterator. 127# define _LIBCPP_ABI_NO_ITERATOR_BASES 128// Use the smallest possible integer type to represent the index of the variant. 129// Previously libc++ used "unsigned int" exclusively. 130# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 131// Unstable attempt to provide a more optimized std::function 132# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 133// All the regex constants must be distinct and nonzero. 134# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 135// Re-worked external template instantiations for std::string with a focus on 136// performance and fast-path inlining. 137# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 138// Enable clang::trivial_abi on std::unique_ptr. 139# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 140// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 141# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 142// std::random_device holds some state when it uses an implementation that gets 143// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 144// implementation to another one on a platform that has already shipped 145// std::random_device, one needs to retain the same object layout to remain ABI 146// compatible. This switch removes these workarounds for platforms that don't care 147// about ABI compatibility. 148# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 149// Don't export the legacy __basic_string_common class and its methods from the built library. 150# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 151// Don't export the legacy __vector_base_common class and its methods from the built library. 152# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 153// According to the Standard, `bitset::operator[] const` returns bool 154# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 155// Fix the implementation of CityHash used for std::hash<fundamental-type>. 156// This is an ABI break because `std::hash` will return a different result, 157// which means that hashing the same object in translation units built against 158// different versions of libc++ can return inconsistent results. This is especially 159// tricky since std::hash is used in the implementation of unordered containers. 160// 161// The incorrect implementation of CityHash has the problem that it drops some 162// bits on the floor. 163# define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION 164// Remove the base 10 implementation of std::to_chars from the dylib. 165// The implementation moved to the header, but we still export the symbols from 166// the dylib for backwards compatibility. 167# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 168// Save memory by providing the allocator more freedom to allocate the most 169// efficient size class by dropping the alignment requirements for std::string's 170// pointer from 16 to 8. This changes the output of std::string::max_size, 171// which makes it ABI breaking 172# define _LIBCPP_ABI_STRING_8_BYTE_ALIGNMENT 173# elif _LIBCPP_ABI_VERSION == 1 174# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 175// Enable compiling copies of now inline methods into the dylib to support 176// applications compiled against older libraries. This is unnecessary with 177// COFF dllexport semantics, since dllexport forces a non-inline definition 178// of inline functions to be emitted anyway. Our own non-inline copy would 179// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 180// the linker will take issue with the symbols in the shared object if the 181// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 182// so disable it. 183# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 184# endif 185// Feature macros for disabling pre ABI v1 features. All of these options 186// are deprecated. 187# if defined(__FreeBSD__) && __FreeBSD__ < 14 188# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 189# endif 190// For XCOFF linkers, we have problems if we see a weak hidden version of a symbol 191// in user code (like you get with -fvisibility-inlines-hidden) and then a strong def 192// in the library, so we need to always rely on the library version. 193# if defined(_AIX) 194# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 195# endif 196# endif 197 198# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 199// Define a key function for `bad_function_call` in the library, to centralize 200// its vtable and typeinfo to libc++ rather than having all other libraries 201// using that class define their own copies. 202# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 203# endif 204 205// We had some bugs where we use [[no_unique_address]] together with construct_at, 206// which causes UB as the call on construct_at could write to overlapping subobjects 207// 208// https://github.com/llvm/llvm-project/issues/70506 209// https://github.com/llvm/llvm-project/issues/70494 210// 211// To fix the bug we had to change the ABI of some classes to remove [[no_unique_address]] under certain conditions. 212// The below macro is used for all classes whose ABI have changed as part of fixing these bugs. 213# define _LIBCPP_ABI_2023_OVERLAPPING_SUBOBJECT_FIX_TAG __attribute__((__abi_tag__("subobj_fix_2023"))) 214 215// Changes the iterator type of select containers (see below) to a bounded iterator that keeps track of whether it's 216// within the bounds of the original container and asserts it on every dereference. 217// 218// ABI impact: changes the iterator type of the relevant containers. 219// 220// Supported containers: 221// - `span`; 222// - `string_view`; 223// - `array`. 224// #define _LIBCPP_ABI_BOUNDED_ITERATORS 225 226// } ABI 227 228// HARDENING { 229 230// TODO(hardening): deprecate this in LLVM 19. 231// This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes) 232// equivalent to setting the extensive mode. 233# ifdef _LIBCPP_ENABLE_ASSERTIONS 234# if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 235# error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" 236# endif 237# if _LIBCPP_ENABLE_ASSERTIONS 238# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_EXTENSIVE 239# endif 240# endif 241 242// The library provides the macro `_LIBCPP_HARDENING_MODE` which can be set to one of the following values: 243// 244// - `_LIBCPP_HARDENING_MODE_NONE`; 245// - `_LIBCPP_HARDENING_MODE_FAST`; 246// - `_LIBCPP_HARDENING_MODE_EXTENSIVE`; 247// - `_LIBCPP_HARDENING_MODE_DEBUG`. 248// 249// These values have the following effects: 250// 251// - `_LIBCPP_HARDENING_MODE_NONE` -- sets the hardening mode to "none" which disables all runtime hardening checks; 252// 253// - `_LIBCPP_HARDENING_MODE_FAST` -- sets that hardening mode to "fast". The fast mode enables security-critical checks 254// that can be done with relatively little runtime overhead in constant time; 255// 256// - `_LIBCPP_HARDENING_MODE_EXTENSIVE` -- sets the hardening mode to "extensive". The extensive mode is a superset of 257// the fast mode that additionally enables checks that are relatively cheap and prevent common types of logic errors 258// but are not necessarily security-critical; 259// 260// - `_LIBCPP_HARDENING_MODE_DEBUG` -- sets the hardening mode to "debug". The debug mode is a superset of the extensive 261// mode and enables all checks available in the library, including internal assertions. Checks that are part of the 262// debug mode can be very expensive and thus the debug mode is intended to be used for testing, not in production. 263 264// Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These 265// macros are only for internal use -- users should only pick one of the high-level hardening modes described above. 266// 267// - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and 268// a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: 269// - the sentinel is reachable from the begin iterator; 270// - TODO(hardening): both iterators refer to the same container. 271// 272// - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through 273// the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access 274// a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like 275// `optional` and `function` are considered one-element containers for the purposes of this check. 276// 277// - `_LIBCPP_ASSERT_NON_NULL` -- checks that the pointer being dereferenced is not null. On most modern platforms zero 278// address does not refer to an actual location in memory, so a null pointer dereference would not compromize the 279// memory security of a program (however, it is still undefined behavior that can result in strange errors due to 280// compiler optimizations). 281// 282// - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the 283// given ranges do not overlap. 284// 285// - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure 286// the containers have compatible allocators. 287// 288// - `_LIBCPP_ASSERT_PEDANTIC` -- checks prerequisites which are imposed by the Standard, but violating which happens to 289// be benign in our implementation. 290// 291// - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on 292// user input. 293// 294// - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. 295 296// clang-format off 297# define _LIBCPP_HARDENING_MODE_NONE (1 << 1) 298# define _LIBCPP_HARDENING_MODE_FAST (1 << 2) 299# define _LIBCPP_HARDENING_MODE_EXTENSIVE (1 << 4) // Deliberately not ordered. 300# define _LIBCPP_HARDENING_MODE_DEBUG (1 << 3) 301// clang-format on 302 303# ifndef _LIBCPP_HARDENING_MODE 304# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_DEFAULT 305# endif 306 307# if _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_NONE && \ 308 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_FAST && \ 309 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_EXTENSIVE && \ 310 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_DEBUG 311# error _LIBCPP_HARDENING_MODE must be set to one of the following values: \ 312_LIBCPP_HARDENING_MODE_NONE, \ 313_LIBCPP_HARDENING_MODE_FAST, \ 314_LIBCPP_HARDENING_MODE_EXTENSIVE, \ 315_LIBCPP_HARDENING_MODE_DEBUG 316# endif 317 318// clang-format off 319// Fast hardening mode checks. 320 321# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 322 323// Enabled checks. 324# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 325# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 326// Disabled checks. 327// On most modern platforms, dereferencing a null pointer does not lead to an actual memory access. 328# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSUME(expression) 329// Overlapping ranges will make algorithms produce incorrect results but don't directly lead to a security 330// vulnerability. 331# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 332# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 333# define _LIBCPP_ASSERT_PEDANTIC(expression, message) _LIBCPP_ASSUME(expression) 334# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 335# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 336 337// Extensive hardening mode checks. 338 339# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE 340 341// Enabled checks. 342# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 343# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 344# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSERT(expression, message) 345# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 346# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 347# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 348# define _LIBCPP_ASSERT_PEDANTIC(expression, message) _LIBCPP_ASSERT(expression, message) 349// Disabled checks. 350# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 351 352// Debug hardening mode checks. 353 354# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG 355 356// All checks enabled. 357# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSERT(expression, message) 358# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSERT(expression, message) 359# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSERT(expression, message) 360# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSERT(expression, message) 361# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSERT(expression, message) 362# define _LIBCPP_ASSERT_PEDANTIC(expression, message) _LIBCPP_ASSERT(expression, message) 363# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSERT(expression, message) 364# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSERT(expression, message) 365 366// Disable all checks if hardening is not enabled. 367 368# else 369 370// All checks disabled. 371# define _LIBCPP_ASSERT_VALID_INPUT_RANGE(expression, message) _LIBCPP_ASSUME(expression) 372# define _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(expression, message) _LIBCPP_ASSUME(expression) 373# define _LIBCPP_ASSERT_NON_NULL(expression, message) _LIBCPP_ASSUME(expression) 374# define _LIBCPP_ASSERT_NON_OVERLAPPING_RANGES(expression, message) _LIBCPP_ASSUME(expression) 375# define _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(expression, message) _LIBCPP_ASSUME(expression) 376# define _LIBCPP_ASSERT_PEDANTIC(expression, message) _LIBCPP_ASSUME(expression) 377# define _LIBCPP_ASSERT_INTERNAL(expression, message) _LIBCPP_ASSUME(expression) 378# define _LIBCPP_ASSERT_UNCATEGORIZED(expression, message) _LIBCPP_ASSUME(expression) 379 380# endif // _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 381// clang-format on 382 383// } HARDENING 384 385# define _LIBCPP_TOSTRING2(x) #x 386# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 387 388// NOLINTNEXTLINE(libcpp-cpp-version-check) 389# if __cplusplus < 201103L 390# define _LIBCPP_CXX03_LANG 391# endif 392 393# ifndef __has_attribute 394# define __has_attribute(__x) 0 395# endif 396 397# ifndef __has_builtin 398# define __has_builtin(__x) 0 399# endif 400 401# ifndef __has_extension 402# define __has_extension(__x) 0 403# endif 404 405# ifndef __has_feature 406# define __has_feature(__x) 0 407# endif 408 409# ifndef __has_cpp_attribute 410# define __has_cpp_attribute(__x) 0 411# endif 412 413# ifndef __has_constexpr_builtin 414# define __has_constexpr_builtin(x) 0 415# endif 416 417// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 418// the compiler and '1' otherwise. 419# ifndef __is_identifier 420# define __is_identifier(__x) 1 421# endif 422 423# ifndef __has_declspec_attribute 424# define __has_declspec_attribute(__x) 0 425# endif 426 427# define __has_keyword(__x) !(__is_identifier(__x)) 428 429# ifndef __has_include 430# define __has_include(...) 0 431# endif 432 433# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L 434# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" 435# endif 436 437// FIXME: ABI detection should be done via compiler builtin macros. This 438// is just a placeholder until Clang implements such macros. For now assume 439// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 440// and allow the user to explicitly specify the ABI to handle cases where this 441// heuristic falls short. 442# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 443# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 444# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 445# define _LIBCPP_ABI_ITANIUM 446# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 447# define _LIBCPP_ABI_MICROSOFT 448# else 449# if defined(_WIN32) && defined(_MSC_VER) 450# define _LIBCPP_ABI_MICROSOFT 451# else 452# define _LIBCPP_ABI_ITANIUM 453# endif 454# endif 455 456# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 457# define _LIBCPP_ABI_VCRUNTIME 458# endif 459 460# if __has_feature(experimental_library) 461# ifndef _LIBCPP_ENABLE_EXPERIMENTAL 462# define _LIBCPP_ENABLE_EXPERIMENTAL 463# endif 464# endif 465 466// Incomplete features get their own specific disabling flags. This makes it 467// easier to grep for target specific flags once the feature is complete. 468# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 469# define _LIBCPP_HAS_NO_INCOMPLETE_PSTL 470# define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN 471# define _LIBCPP_HAS_NO_INCOMPLETE_TZDB 472# define _LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM 473# endif 474 475// Need to detect which libc we're using if we're on Linux. 476# if defined(__linux__) 477# include <features.h> 478# if defined(__GLIBC_PREREQ) 479# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 480# else 481# define _LIBCPP_GLIBC_PREREQ(a, b) 0 482# endif // defined(__GLIBC_PREREQ) 483# endif // defined(__linux__) 484 485# if defined(__MVS__) 486# include <features.h> // for __NATIVE_ASCII_F 487# endif 488 489# ifdef __FreeBSD__ 490# include <osreldate.h> // for __FreeBSD_version 491# endif 492 493# ifndef __BYTE_ORDER__ 494# error \ 495 "Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform" 496# endif 497 498# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 499# define _LIBCPP_LITTLE_ENDIAN 500# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 501# define _LIBCPP_BIG_ENDIAN 502# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 503 504# if defined(_WIN32) 505# define _LIBCPP_WIN32API 506# define _LIBCPP_SHORT_WCHAR 1 507// Both MinGW and native MSVC provide a "MSVC"-like environment 508# define _LIBCPP_MSVCRT_LIKE 509// If mingw not explicitly detected, assume using MS C runtime only if 510// a MS compatibility version is specified. 511# if defined(_MSC_VER) && !defined(__MINGW32__) 512# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 513# endif 514# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 515# define _LIBCPP_HAS_BITSCAN64 516# endif 517# define _LIBCPP_HAS_OPEN_WITH_WCHAR 518# endif // defined(_WIN32) 519 520# if defined(_AIX) && !defined(__64BIT__) 521// The size of wchar is 2 byte on 32-bit mode on AIX. 522# define _LIBCPP_SHORT_WCHAR 1 523# endif 524 525// Libc++ supports various implementations of std::random_device. 526// 527// _LIBCPP_USING_DEV_RANDOM 528// Read entropy from the given file, by default `/dev/urandom`. 529// If a token is provided, it is assumed to be the path to a file 530// to read entropy from. This is the default behavior if nothing 531// else is specified. This implementation requires storing state 532// inside `std::random_device`. 533// 534// _LIBCPP_USING_ARC4_RANDOM 535// Use arc4random(). This allows obtaining random data even when 536// using sandboxing mechanisms. On some platforms like Apple, this 537// is the recommended source of entropy for user-space programs. 538// When this option is used, the token passed to `std::random_device`'s 539// constructor *must* be "/dev/urandom" -- anything else is an error. 540// 541// _LIBCPP_USING_GETENTROPY 542// Use getentropy(). 543// When this option is used, the token passed to `std::random_device`'s 544// constructor *must* be "/dev/urandom" -- anything else is an error. 545// 546// _LIBCPP_USING_FUCHSIA_CPRNG 547// Use Fuchsia's zx_cprng_draw() system call, which is specified to 548// deliver high-quality entropy and cannot fail. 549// When this option is used, the token passed to `std::random_device`'s 550// constructor *must* be "/dev/urandom" -- anything else is an error. 551// 552// _LIBCPP_USING_NACL_RANDOM 553// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 554// including accesses to the special files under `/dev`. This implementation 555// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 556// When this option is used, the token passed to `std::random_device`'s 557// constructor *must* be "/dev/urandom" -- anything else is an error. 558// 559// _LIBCPP_USING_WIN32_RANDOM 560// Use rand_s(), for use on Windows. 561// When this option is used, the token passed to `std::random_device`'s 562// constructor *must* be "/dev/urandom" -- anything else is an error. 563# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 564 defined(__DragonFly__) 565# define _LIBCPP_USING_ARC4_RANDOM 566# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 567# define _LIBCPP_USING_GETENTROPY 568# elif defined(__Fuchsia__) 569# define _LIBCPP_USING_FUCHSIA_CPRNG 570# elif defined(__native_client__) 571# define _LIBCPP_USING_NACL_RANDOM 572# elif defined(_LIBCPP_WIN32API) 573# define _LIBCPP_USING_WIN32_RANDOM 574# else 575# define _LIBCPP_USING_DEV_RANDOM 576# endif 577 578# ifndef _LIBCPP_CXX03_LANG 579 580# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 581# define _ALIGNAS_TYPE(x) alignas(x) 582# define _ALIGNAS(x) alignas(x) 583# define _LIBCPP_NORETURN [[noreturn]] 584# define _NOEXCEPT noexcept 585# define _NOEXCEPT_(x) noexcept(x) 586# define _LIBCPP_CONSTEXPR constexpr 587 588# else 589 590# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 591# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 592# define _ALIGNAS(x) __attribute__((__aligned__(x))) 593# define _LIBCPP_NORETURN __attribute__((__noreturn__)) 594# define _LIBCPP_HAS_NO_NOEXCEPT 595# define nullptr __nullptr 596# define _NOEXCEPT throw() 597# define _NOEXCEPT_(x) 598# define static_assert(...) _Static_assert(__VA_ARGS__) 599# define decltype(...) __decltype(__VA_ARGS__) 600# define _LIBCPP_CONSTEXPR 601 602typedef __char16_t char16_t; 603typedef __char32_t char32_t; 604 605# endif 606 607# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 608# define _LIBCPP_HAS_NO_EXCEPTIONS 609# endif 610 611# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 612 613# if defined(_LIBCPP_COMPILER_CLANG_BASED) 614 615# if defined(__APPLE__) 616# if defined(__i386__) || defined(__x86_64__) 617// use old string layout on x86_64 and i386 618# elif defined(__arm__) 619// use old string layout on arm (which does not include aarch64/arm64), except on watch ABIs 620# if defined(__ARM_ARCH_7K__) && __ARM_ARCH_7K__ >= 2 621# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 622# endif 623# else 624# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 625# endif 626# endif 627 628// Objective-C++ features (opt-in) 629# if __has_feature(objc_arc) 630# define _LIBCPP_HAS_OBJC_ARC 631# endif 632 633# if __has_feature(objc_arc_weak) 634# define _LIBCPP_HAS_OBJC_ARC_WEAK 635# endif 636 637# if __has_extension(blocks) 638# define _LIBCPP_HAS_EXTENSION_BLOCKS 639# endif 640 641# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 642# define _LIBCPP_HAS_BLOCKS_RUNTIME 643# endif 644 645# if !__has_feature(address_sanitizer) 646# define _LIBCPP_HAS_NO_ASAN 647# endif 648 649# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 650 651# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 652 653# elif defined(_LIBCPP_COMPILER_GCC) 654 655# if !defined(__SANITIZE_ADDRESS__) 656# define _LIBCPP_HAS_NO_ASAN 657# endif 658 659# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 660 661# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 662 663# endif // _LIBCPP_COMPILER_[CLANG|GCC] 664 665# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 666 667# ifdef _DLL 668# define _LIBCPP_CRT_FUNC __declspec(dllimport) 669# else 670# define _LIBCPP_CRT_FUNC 671# endif 672 673# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 674# define _LIBCPP_DLL_VIS 675# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 676# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 677# define _LIBCPP_OVERRIDABLE_FUNC_VIS 678# define _LIBCPP_EXPORTED_FROM_ABI 679# elif defined(_LIBCPP_BUILDING_LIBRARY) 680# define _LIBCPP_DLL_VIS __declspec(dllexport) 681# if defined(__MINGW32__) 682# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 683# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 684# else 685# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 686# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 687# endif 688# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 689# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 690# else 691# define _LIBCPP_DLL_VIS __declspec(dllimport) 692# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 693# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 694# define _LIBCPP_OVERRIDABLE_FUNC_VIS 695# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 696# endif 697 698# define _LIBCPP_HIDDEN 699# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 700# define _LIBCPP_TEMPLATE_VIS 701# define _LIBCPP_TEMPLATE_DATA_VIS 702# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 703 704# else 705 706# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 707# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 708# else 709# define _LIBCPP_VISIBILITY(vis) 710# endif 711 712# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 713# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 714# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 715# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 716# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 717 718// TODO: Make this a proper customization point or remove the option to override it. 719# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 720# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 721# endif 722 723# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 724// The inline should be removed once PR32114 is resolved 725# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 726# else 727# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 728# endif 729 730// GCC doesn't support the type_visibility attribute, so we have to keep the visibility attribute on templates 731# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__) 732# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 733# else 734# define _LIBCPP_TEMPLATE_VIS 735# endif 736 737# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) \ 738 && _LIBCPP_CLANG_VER >= 1500 // FreeBSD customization 739# define _LIBCPP_TYPE_VISIBILITY_DEFAULT __attribute__((__type_visibility__("default"))) 740# else 741# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 742# endif 743 744# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 745 746# if __has_attribute(exclude_from_explicit_instantiation) 747# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 748# else 749// Try to approximate the effect of exclude_from_explicit_instantiation 750// (which is that entities are not assumed to be provided by explicit 751// template instantiations in the dylib) by always inlining those entities. 752# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 753# endif 754 755# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 756# define _LIBCPP_HARDENING_SIG f 757# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE 758# define _LIBCPP_HARDENING_SIG s 759# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG 760# define _LIBCPP_HARDENING_SIG d 761# else 762# define _LIBCPP_HARDENING_SIG n // "none" 763# endif 764 765# ifdef _LIBCPP_HAS_NO_EXCEPTIONS 766# define _LIBCPP_EXCEPTIONS_SIG n 767# else 768# define _LIBCPP_EXCEPTIONS_SIG e 769# endif 770 771# define _LIBCPP_ODR_SIGNATURE \ 772 _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_EXCEPTIONS_SIG), _LIBCPP_VERSION) 773 774// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 775// on two levels: 776// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 777// symbols from their dynamic library by means of using the libc++ headers. This ensures 778// that those symbols stay private to the dynamic library in which it is defined. 779// 780// 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. 781// This ensures that no ODR violation can arise from mixing two TUs compiled with different 782// versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the 783// program contains two definitions of a function, the ODR requires them to be token-by-token 784// equivalent, and the linker is allowed to pick either definition and discard the other one. 785// 786// For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled 787// *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs 788// compiled with different settings), the two definitions are both visible by the linker and they 789// have the same name, but they have a meaningfully different implementation (one throws an exception 790// and the other aborts the program). This violates the ODR and makes the program ill-formed, and in 791// practice what will happen is that the linker will pick one of the definitions at random and will 792// discard the other one. This can quite clearly lead to incorrect program behavior. 793// 794// A similar reasoning holds for many other properties that are ODR-affecting. Essentially any 795// property that causes the code of a function to differ from the code in another configuration 796// can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI 797// tag, but we encode the ones that we think are most important: library version, exceptions, and 798// hardening mode. 799// 800// Note that historically, solving this problem has been achieved in various ways, including 801// force-inlining all functions or giving internal linkage to all functions. Both these previous 802// solutions suffer from drawbacks that lead notably to code bloat. 803// 804// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 805// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 806// 807// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions 808// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled 809// name of a virtual function is part of its ABI, since some architectures like arm64e can sign 810// the virtual function pointer in the vtable based on the mangled name of the function. Since 811// we use an ABI tag that changes with each released version, the mangled name of the virtual 812// function would change, which is incorrect. Note that it doesn't make much sense to change 813// the implementation of a virtual function in an ABI-incompatible way in the first place, 814// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. 815// 816// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 817// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 818// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 819# ifndef _LIBCPP_NO_ABI_TAG 820# define _LIBCPP_HIDE_FROM_ABI \ 821 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 822 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE)))) 823# else 824# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 825# endif 826# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 827 828// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern 829// "C" function, as those lack mangling. 830# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 831 832# ifdef _LIBCPP_BUILDING_LIBRARY 833# if _LIBCPP_ABI_VERSION > 1 834# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 835# else 836# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 837# endif 838# else 839# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 840# endif 841 842// TODO(LLVM-19): Remove _LIBCPP_INLINE_VISIBILITY and _VSTD, which we're keeping around 843// only to ease the renaming for downstreams. 844# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 845# define _VSTD std 846 847// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 848// clang-format off 849# define _LIBCPP_BEGIN_NAMESPACE_STD namespace _LIBCPP_TYPE_VISIBILITY_DEFAULT std { \ 850 inline namespace _LIBCPP_ABI_NAMESPACE { 851# define _LIBCPP_END_NAMESPACE_STD }} 852 853# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \ 854 inline namespace __fs { namespace filesystem { 855 856# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 857// clang-format on 858 859# if __has_attribute(__enable_if__) 860# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 861# endif 862 863# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) 864# define _LIBCPP_HAS_NO_INT128 865# endif 866 867# ifdef _LIBCPP_CXX03_LANG 868# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 869 struct _LIBCPP_EXPORTED_FROM_ABI x { \ 870 enum __lx 871// clang-format off 872# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 873 __lx __v_; \ 874 _LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \ 875 _LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 876 _LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \ 877 }; 878// clang-format on 879 880# else // _LIBCPP_CXX03_LANG 881# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x 882# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 883# endif // _LIBCPP_CXX03_LANG 884 885# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__NetBSD__) 886# define _LIBCPP_LOCALE__L_EXTENSIONS 1 887# endif 888 889# ifdef __FreeBSD__ 890# define _DECLARE_C99_LDBL_MATH 1 891# endif 892 893// If we are getting operator new from the MSVC CRT, then allocation overloads 894// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 895# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 896# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 897# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 898// We're deferring to Microsoft's STL to provide aligned new et al. We don't 899// have it unless the language feature test macro is defined. 900# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 901# elif defined(__MVS__) 902# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 903# endif 904 905# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 906# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 907# endif 908 909// It is not yet possible to use aligned_alloc() on all Apple platforms since 910// 10.15 was the first version to ship an implementation of aligned_alloc(). 911# if defined(__APPLE__) 912# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ 913 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) 914# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 915# endif 916# elif defined(__ANDROID__) && __ANDROID_API__ < 28 917// Android only provides aligned_alloc when targeting API 28 or higher. 918# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 919# endif 920 921# if defined(__APPLE__) || defined(__FreeBSD__) 922# define _LIBCPP_HAS_DEFAULTRUNELOCALE 923# endif 924 925# if defined(__APPLE__) || defined(__FreeBSD__) 926# define _LIBCPP_WCTYPE_IS_MASK 927# endif 928 929# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 930# define _LIBCPP_HAS_NO_CHAR8_T 931# endif 932 933// Deprecation macros. 934// 935// Deprecations warnings are always enabled, except when users explicitly opt-out 936// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 937# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 938# if __has_attribute(__deprecated__) 939# define _LIBCPP_DEPRECATED __attribute__((__deprecated__)) 940# define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m))) 941# elif _LIBCPP_STD_VER >= 14 942# define _LIBCPP_DEPRECATED [[deprecated]] 943# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 944# else 945# define _LIBCPP_DEPRECATED 946# define _LIBCPP_DEPRECATED_(m) 947# endif 948# else 949# define _LIBCPP_DEPRECATED 950# define _LIBCPP_DEPRECATED_(m) 951# endif 952 953# if !defined(_LIBCPP_CXX03_LANG) 954# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 955# else 956# define _LIBCPP_DEPRECATED_IN_CXX11 957# endif 958 959# if _LIBCPP_STD_VER >= 14 960# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 961# else 962# define _LIBCPP_DEPRECATED_IN_CXX14 963# endif 964 965# if _LIBCPP_STD_VER >= 17 966# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 967# else 968# define _LIBCPP_DEPRECATED_IN_CXX17 969# endif 970 971# if _LIBCPP_STD_VER >= 20 972# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 973# else 974# define _LIBCPP_DEPRECATED_IN_CXX20 975# endif 976 977# if _LIBCPP_STD_VER >= 23 978# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED 979# else 980# define _LIBCPP_DEPRECATED_IN_CXX23 981# endif 982 983# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 984# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 985# else 986# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 987# endif 988 989// Macros to enter and leave a state where deprecation warnings are suppressed. 990# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 991# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 992 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 993 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 994# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 995# else 996# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 997# define _LIBCPP_SUPPRESS_DEPRECATED_POP 998# endif 999 1000# if _LIBCPP_STD_VER <= 11 1001# define _LIBCPP_EXPLICIT_SINCE_CXX14 1002# else 1003# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit 1004# endif 1005 1006# if _LIBCPP_STD_VER >= 23 1007# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit 1008# else 1009# define _LIBCPP_EXPLICIT_SINCE_CXX23 1010# endif 1011 1012# if _LIBCPP_STD_VER >= 14 1013# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr 1014# else 1015# define _LIBCPP_CONSTEXPR_SINCE_CXX14 1016# endif 1017 1018# if _LIBCPP_STD_VER >= 17 1019# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr 1020# else 1021# define _LIBCPP_CONSTEXPR_SINCE_CXX17 1022# endif 1023 1024# if _LIBCPP_STD_VER >= 20 1025# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr 1026# else 1027# define _LIBCPP_CONSTEXPR_SINCE_CXX20 1028# endif 1029 1030# if _LIBCPP_STD_VER >= 23 1031# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr 1032# else 1033# define _LIBCPP_CONSTEXPR_SINCE_CXX23 1034# endif 1035 1036# ifndef _LIBCPP_HAS_NO_ASAN 1037extern "C" _LIBCPP_EXPORTED_FROM_ABI void 1038__sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 1039extern "C" _LIBCPP_EXPORTED_FROM_ABI void __sanitizer_annotate_double_ended_contiguous_container( 1040 const void*, const void*, const void*, const void*, const void*, const void*); 1041extern "C" _LIBCPP_EXPORTED_FROM_ABI int 1042__sanitizer_verify_double_ended_contiguous_container(const void*, const void*, const void*, const void*); 1043# endif 1044 1045// Try to find out if RTTI is disabled. 1046# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 1047# define _LIBCPP_HAS_NO_RTTI 1048# endif 1049 1050# ifndef _LIBCPP_WEAK 1051# define _LIBCPP_WEAK __attribute__((__weak__)) 1052# endif 1053 1054// Thread API 1055// clang-format off 1056# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1057 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1058 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1059 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1060 1061# if defined(__FreeBSD__) || \ 1062 defined(__wasi__) || \ 1063 defined(__NetBSD__) || \ 1064 defined(__OpenBSD__) || \ 1065 defined(__NuttX__) || \ 1066 defined(__linux__) || \ 1067 defined(__GNU__) || \ 1068 defined(__APPLE__) || \ 1069 defined(__MVS__) || \ 1070 defined(_AIX) || \ 1071 defined(__EMSCRIPTEN__) 1072// clang-format on 1073# define _LIBCPP_HAS_THREAD_API_PTHREAD 1074# elif defined(__Fuchsia__) 1075// TODO(44575): Switch to C11 thread API when possible. 1076# define _LIBCPP_HAS_THREAD_API_PTHREAD 1077# elif defined(_LIBCPP_WIN32API) 1078# define _LIBCPP_HAS_THREAD_API_WIN32 1079# else 1080# error "No thread API" 1081# endif // _LIBCPP_HAS_THREAD_API 1082# endif // _LIBCPP_HAS_NO_THREADS 1083 1084# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1085# if defined(__ANDROID__) && __ANDROID_API__ >= 30 1086# define _LIBCPP_HAS_COND_CLOCKWAIT 1087# elif defined(_LIBCPP_GLIBC_PREREQ) 1088# if _LIBCPP_GLIBC_PREREQ(2, 30) 1089# define _LIBCPP_HAS_COND_CLOCKWAIT 1090# endif 1091# endif 1092# endif 1093 1094# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1095# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1096 _LIBCPP_HAS_NO_THREADS is not defined. 1097# endif 1098 1099# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1100# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1101 _LIBCPP_HAS_NO_THREADS is defined. 1102# endif 1103 1104# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1105# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1106 _LIBCPP_HAS_NO_THREADS is defined. 1107# endif 1108 1109# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1110# define __STDCPP_THREADS__ 1 1111# endif 1112 1113// The glibc and Bionic implementation of pthreads implements 1114// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1115// mutexes have no destroy mechanism. 1116// 1117// This optimization can't be performed on Apple platforms, where 1118// pthread_mutex_destroy can allow the kernel to release resources. 1119// See https://llvm.org/D64298 for details. 1120// 1121// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1122// respective stakeholders. 1123// clang-format off 1124# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 1125 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1126 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1127// clang-format on 1128# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1129# endif 1130 1131// Destroying a condvar is a nop on Windows. 1132// 1133// This optimization can't be performed on Apple platforms, where 1134// pthread_cond_destroy can allow the kernel to release resources. 1135// See https://llvm.org/D64298 for details. 1136// 1137// TODO(EricWF): This is potentially true for some pthread implementations 1138// as well. 1139# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1140# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1141# endif 1142 1143// Some systems do not provide gets() in their C library, for security reasons. 1144# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 1145# define _LIBCPP_C_HAS_NO_GETS 1146# endif 1147 1148# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 1149 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1150# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1151# endif 1152 1153# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1154# define _LIBCPP_HAS_C_ATOMIC_IMP 1155# elif defined(_LIBCPP_COMPILER_GCC) 1156# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1157# endif 1158 1159# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1160 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1161# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1162# else 1163# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1164# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1165# endif 1166# ifdef _LIBCPP_FREESTANDING 1167# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1168# endif 1169# endif 1170 1171# if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) 1172# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__)) 1173# else 1174# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS 1175# endif 1176 1177# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1178# if defined(__clang__) && __has_attribute(acquire_capability) 1179// Work around the attribute handling in clang. When both __declspec and 1180// __attribute__ are present, the processing goes awry preventing the definition 1181// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1182// combining the two does work. 1183# if !defined(_MSC_VER) 1184# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1185# endif 1186# endif 1187# endif 1188 1189# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1190# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1191# else 1192# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1193# endif 1194 1195# if _LIBCPP_STD_VER >= 20 1196# define _LIBCPP_CONSTINIT constinit 1197# elif __has_attribute(__require_constant_initialization__) 1198# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1199# else 1200# define _LIBCPP_CONSTINIT 1201# endif 1202 1203# if __has_attribute(__noinline__) 1204# define _LIBCPP_NOINLINE __attribute__((__noinline__)) 1205# else 1206# define _LIBCPP_NOINLINE 1207# endif 1208 1209// We often repeat things just for handling wide characters in the library. 1210// When wide characters are disabled, it can be useful to have a quick way of 1211// disabling it without having to resort to #if-#endif, which has a larger 1212// impact on readability. 1213# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1214# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1215# else 1216# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1217# endif 1218 1219# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1220# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1221# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1222# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1223# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1224# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1225# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1226 1227# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1228# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1229# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION 1230# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1231# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1232# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1233# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1234# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1235 1236// clang-format off 1237# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh()\")") _Pragma("push_macro(\"move(int, int)\")") _Pragma("push_macro(\"erase()\")") 1238# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh()\")") _Pragma("pop_macro(\"move(int, int)\")") _Pragma("pop_macro(\"erase()\")") 1239// clang-format on 1240 1241# ifndef _LIBCPP_NO_AUTO_LINK 1242# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1243# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1244# pragma comment(lib, "c++.lib") 1245# else 1246# pragma comment(lib, "libc++.lib") 1247# endif 1248# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1249# endif // _LIBCPP_NO_AUTO_LINK 1250 1251// Configures the fopen close-on-exec mode character, if any. This string will 1252// be appended to any mode string used by fstream for fopen/fdopen. 1253// 1254// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1255// do. 1256# if defined(__BIONIC__) 1257# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1258# else 1259# define _LIBCPP_FOPEN_CLOEXEC_MODE 1260# endif 1261 1262# if __has_cpp_attribute(msvc::no_unique_address) 1263// MSVC implements [[no_unique_address]] as a silent no-op currently. 1264// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1265// However, MSVC implements [[msvc::no_unique_address]] which does what 1266// [[no_unique_address]] is supposed to do, in general. 1267 1268// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1269// [[msvc::no_unique_address]] though. If/when it does implement 1270// [[msvc::no_unique_address]], this should be preferred though. 1271# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1272# elif __has_cpp_attribute(no_unique_address) 1273# define _LIBCPP_NO_UNIQUE_ADDRESS [[__no_unique_address__]] 1274# else 1275# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1276// Note that this can be replaced by #error as soon as clang-cl 1277// implements msvc::no_unique_address, since there should be no C++20 1278// compiler that doesn't support one of the two attributes at that point. 1279// We generally don't want to use this macro outside of C++20-only code, 1280// because using it conditionally in one language version only would make 1281// the ABI inconsistent. 1282# endif 1283 1284# ifdef _LIBCPP_COMPILER_CLANG_BASED 1285# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1286# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1287# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1288# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1289# elif defined(_LIBCPP_COMPILER_GCC) 1290# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1291# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1292# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1293# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1294# else 1295# define _LIBCPP_DIAGNOSTIC_PUSH 1296# define _LIBCPP_DIAGNOSTIC_POP 1297# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1298# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1299# endif 1300 1301// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these 1302// functions is gradually being added to existing C libraries. The conditions 1303// below check for known C library versions and conditions under which these 1304// functions are declared by the C library. 1305# define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1306// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if 1307// __cpp_char8_t is defined or if C2X extensions are enabled. Determining 1308// the latter depends on internal GNU libc details that are not appropriate 1309// to depend on here, so any declarations present when __cpp_char8_t is not 1310// defined are ignored. 1311# if defined(_LIBCPP_GLIBC_PREREQ) 1312# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) 1313# undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1314# endif 1315# endif 1316 1317// There are a handful of public standard library types that are intended to 1318// support CTAD but don't need any explicit deduction guides to do so. This 1319// macro is used to mark them as such, which suppresses the 1320// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code 1321// with these classes. 1322# if _LIBCPP_STD_VER >= 17 1323# ifdef _LIBCPP_COMPILER_CLANG_BASED 1324# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \ 1325 template <class... _Tag> \ 1326 [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...> 1327# else 1328# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \ 1329 template <class... _Tag> \ 1330 ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...> 1331# endif 1332# else 1333# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") 1334# endif 1335 1336// TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use 1337// compiler intrinsics in the Objective-C++ mode. 1338# ifdef __OBJC__ 1339# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS 1340# endif 1341 1342# define _PSTL_PRAGMA(x) _Pragma(#x) 1343 1344// Enable SIMD for compilers that support OpenMP 4.0 1345# if (defined(_OPENMP) && _OPENMP >= 201307) 1346 1347# define _PSTL_UDR_PRESENT 1348# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd) 1349# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd) 1350# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM)) 1351# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM)) 1352# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM)) 1353# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM)) 1354 1355// Declaration of reduction functor, where 1356// NAME - the name of the functor 1357// OP - type of the callable object with the reduction operation 1358// omp_in - refers to the local partial result 1359// omp_out - refers to the final value of the combiner operator 1360// omp_priv - refers to the private copy of the initial value 1361// omp_orig - refers to the original variable to be reduced 1362# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \ 1363 _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig)) 1364 1365# elif defined(_LIBCPP_COMPILER_CLANG_BASED) 1366 1367# define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)") 1368# define _PSTL_PRAGMA_DECLARE_SIMD 1369# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1370# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1371# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1372# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1373# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1374 1375# else // (defined(_OPENMP) && _OPENMP >= 201307) 1376 1377# define _PSTL_PRAGMA_SIMD 1378# define _PSTL_PRAGMA_DECLARE_SIMD 1379# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) 1380# define _PSTL_PRAGMA_SIMD_SCAN(PRM) 1381# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1382# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1383# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1384 1385# endif // (defined(_OPENMP) && _OPENMP >= 201307) 1386 1387# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED 1388 1389// Optional attributes - these are useful for a better QoI, but not required to be available 1390 1391# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 1392# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 1393# else 1394# define _LIBCPP_NO_CFI 1395# endif 1396 1397# if __has_attribute(__malloc__) 1398# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 1399# else 1400# define _LIBCPP_NOALIAS 1401# endif 1402 1403# if __has_attribute(__using_if_exists__) 1404# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__)) 1405# else 1406# define _LIBCPP_USING_IF_EXISTS 1407# endif 1408 1409# if __has_cpp_attribute(nodiscard) 1410# define _LIBCPP_NODISCARD [[__nodiscard__]] 1411# else 1412// We can't use GCC's [[gnu::warn_unused_result]] and 1413// __attribute__((warn_unused_result)), because GCC does not silence them via 1414// (void) cast. 1415# define _LIBCPP_NODISCARD 1416# endif 1417 1418// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1419// specified as such as an extension. 1420# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1421# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1422# else 1423# define _LIBCPP_NODISCARD_EXT 1424# endif 1425 1426# if _LIBCPP_STD_VER >= 20 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1427# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1428# else 1429# define _LIBCPP_NODISCARD_AFTER_CXX17 1430# endif 1431 1432# if __has_attribute(__no_destroy__) 1433# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1434# else 1435# define _LIBCPP_NO_DESTROY 1436# endif 1437 1438# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1439# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning"))) 1440# else 1441# define _LIBCPP_DIAGNOSE_WARNING(...) 1442# endif 1443 1444// Use a function like macro to imply that it must be followed by a semicolon 1445# if __has_cpp_attribute(fallthrough) 1446# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1447# elif __has_attribute(__fallthrough__) 1448# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1449# else 1450# define _LIBCPP_FALLTHROUGH() ((void)0) 1451# endif 1452 1453# if __has_cpp_attribute(_Clang::__lifetimebound__) 1454# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]] 1455# else 1456# define _LIBCPP_LIFETIMEBOUND 1457# endif 1458 1459# if __has_attribute(__nodebug__) 1460# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1461# else 1462# define _LIBCPP_NODEBUG 1463# endif 1464 1465# if __has_attribute(__standalone_debug__) 1466# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1467# else 1468# define _LIBCPP_STANDALONE_DEBUG 1469# endif 1470 1471# if __has_attribute(__preferred_name__) 1472# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1473# else 1474# define _LIBCPP_PREFERRED_NAME(x) 1475# endif 1476 1477# if __has_attribute(__no_sanitize__) 1478# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__))) 1479# else 1480# define _LIBCPP_NO_SANITIZE(...) 1481# endif 1482 1483# if __has_attribute(__init_priority__) 1484# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100))) 1485# else 1486# define _LIBCPP_INIT_PRIORITY_MAX 1487# endif 1488 1489# if __has_attribute(__format__) 1490// The attribute uses 1-based indices for ordinary and static member functions. 1491// The attribute uses 2-based indices for non-static member functions. 1492# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1493 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1494# else 1495# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1496# endif 1497 1498# if __has_attribute(__packed__) 1499# define _LIBCPP_PACKED __attribute__((__packed__)) 1500# else 1501# define _LIBCPP_PACKED 1502# endif 1503 1504# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) 1505# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1506# else 1507# define _LIBCPP_DECLSPEC_EMPTY_BASES 1508# endif 1509 1510// Allow for build-time disabling of unsigned integer sanitization 1511# if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC) 1512# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 1513# else 1514# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1515# endif 1516 1517#endif // __cplusplus 1518 1519#endif // _LIBCPP___CONFIG 1520