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#if defined(_MSC_VER) && !defined(__clang__) 16# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 18# endif 19#endif 20 21#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 22# pragma GCC system_header 23#endif 24 25#ifdef __cplusplus 26 27# define _LIBCPP_VERSION 15000 28 29# if __STDC_HOSTED__ == 0 30# define _LIBCPP_FREESTANDING 31# endif 32 33# ifndef _LIBCPP_STD_VER 34# if __cplusplus <= 201103L 35# define _LIBCPP_STD_VER 11 36# elif __cplusplus <= 201402L 37# define _LIBCPP_STD_VER 14 38# elif __cplusplus <= 201703L 39# define _LIBCPP_STD_VER 17 40# elif __cplusplus <= 202002L 41# define _LIBCPP_STD_VER 20 42# else 43# define _LIBCPP_STD_VER 22 // current year, or date of c++2b ratification 44# endif 45# endif // _LIBCPP_STD_VER 46 47# if defined(__ELF__) 48# define _LIBCPP_OBJECT_FORMAT_ELF 1 49# elif defined(__MACH__) 50# define _LIBCPP_OBJECT_FORMAT_MACHO 1 51# elif defined(_WIN32) 52# define _LIBCPP_OBJECT_FORMAT_COFF 1 53# elif defined(__wasm__) 54# define _LIBCPP_OBJECT_FORMAT_WASM 1 55# elif defined(_AIX) 56# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 57# else 58// ... add new file formats here ... 59# endif 60 61# if _LIBCPP_ABI_VERSION >= 2 62// Change short string representation so that string data starts at offset 0, 63// improving its alignment in some cases. 64# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 65// Fix deque iterator type in order to support incomplete types. 66# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 67// Fix undefined behavior in how std::list stores its linked nodes. 68# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 69// Fix undefined behavior in how __tree stores its end and parent nodes. 70# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 71// Fix undefined behavior in how __hash_table stores its pointer types. 72# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 73# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 74# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 75// Define a key function for `bad_function_call` in the library, to centralize 76// its vtable and typeinfo to libc++ rather than having all other libraries 77// using that class define their own copies. 78# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 79// Override the default return value of exception::what() for 80// bad_function_call::what() with a string that is specific to 81// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 82// because it changes the vtable layout of bad_function_call. 83# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 84// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 85# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 86// In C++20 and later, don't derive std::plus from std::binary_function, 87// nor std::negate from std::unary_function. 88# define _LIBCPP_ABI_NO_BINDER_BASES 89// Give reverse_iterator<T> one data member of type T, not two. 90// Also, in C++17 and later, don't derive iterator types from std::iterator. 91# define _LIBCPP_ABI_NO_ITERATOR_BASES 92// Use the smallest possible integer type to represent the index of the variant. 93// Previously libc++ used "unsigned int" exclusively. 94# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 95// Unstable attempt to provide a more optimized std::function 96# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 97// All the regex constants must be distinct and nonzero. 98# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 99// Use raw pointers, not wrapped ones, for std::span's iterator type. 100# define _LIBCPP_ABI_SPAN_POINTER_ITERATORS 101// Re-worked external template instantiations for std::string with a focus on 102// performance and fast-path inlining. 103# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 104// Enable clang::trivial_abi on std::unique_ptr. 105# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 106// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 107# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 108// std::random_device holds some state when it uses an implementation that gets 109// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 110// implementation to another one on a platform that has already shipped 111// std::random_device, one needs to retain the same object layout to remain ABI 112// compatible. This switch removes these workarounds for platforms that don't care 113// about ABI compatibility. 114# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 115// Don't export the legacy __basic_string_common class and its methods from the built library. 116# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 117// Don't export the legacy __vector_base_common class and its methods from the built library. 118# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 119// According to the Standard, `bitset::operator[] const` returns bool 120# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 121// Remove the base 10 implementation of std::to_chars from the dylib. 122// The implementation moved to the header, but we still export the symbols from 123// the dylib for backwards compatibility. 124# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 125# elif _LIBCPP_ABI_VERSION == 1 126# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 127// Enable compiling copies of now inline methods into the dylib to support 128// applications compiled against older libraries. This is unnecessary with 129// COFF dllexport semantics, since dllexport forces a non-inline definition 130// of inline functions to be emitted anyway. Our own non-inline copy would 131// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 132// the linker will take issue with the symbols in the shared object if the 133// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 134// so disable it. 135# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 136# endif 137// Feature macros for disabling pre ABI v1 features. All of these options 138// are deprecated. 139# if defined(__FreeBSD__) 140# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 141# endif 142# endif 143 144# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 145// Enable additional explicit instantiations of iostreams components. This 146// reduces the number of weak definitions generated in programs that use 147// iostreams by providing a single strong definition in the shared library. 148# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 149 150// Define a key function for `bad_function_call` in the library, to centralize 151// its vtable and typeinfo to libc++ rather than having all other libraries 152// using that class define their own copies. 153# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 154# endif 155 156# define _LIBCPP_TOSTRING2(x) # x 157# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 158 159# if __cplusplus < 201103L 160# define _LIBCPP_CXX03_LANG 161# endif 162 163# ifndef __has_attribute 164# define __has_attribute(__x) 0 165# endif 166 167# ifndef __has_builtin 168# define __has_builtin(__x) 0 169# endif 170 171# ifndef __has_extension 172# define __has_extension(__x) 0 173# endif 174 175# ifndef __has_feature 176# define __has_feature(__x) 0 177# endif 178 179# ifndef __has_cpp_attribute 180# define __has_cpp_attribute(__x) 0 181# endif 182 183// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 184// the compiler and '1' otherwise. 185# ifndef __is_identifier 186# define __is_identifier(__x) 1 187# endif 188 189# ifndef __has_declspec_attribute 190# define __has_declspec_attribute(__x) 0 191# endif 192 193# define __has_keyword(__x) !(__is_identifier(__x)) 194 195# ifndef __has_include 196# define __has_include(...) 0 197# endif 198 199# if defined(__apple_build_version__) 200# define _LIBCPP_COMPILER_CLANG_BASED 201# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 202# elif defined(__clang__) 203# define _LIBCPP_COMPILER_CLANG_BASED 204# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 205# elif defined(__GNUC__) 206# define _LIBCPP_COMPILER_GCC 207# elif defined(_MSC_VER) 208# define _LIBCPP_COMPILER_MSVC 209# elif defined(__IBMCPP__) 210# define _LIBCPP_COMPILER_IBM 211# endif 212 213# if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 214# error "libc++ does not support using GCC with C++03. Please enable C++11" 215# endif 216 217// FIXME: ABI detection should be done via compiler builtin macros. This 218// is just a placeholder until Clang implements such macros. For now assume 219// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 220// and allow the user to explicitly specify the ABI to handle cases where this 221// heuristic falls short. 222# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 223# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 224# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 225# define _LIBCPP_ABI_ITANIUM 226# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 227# define _LIBCPP_ABI_MICROSOFT 228# else 229# if defined(_WIN32) && defined(_MSC_VER) 230# define _LIBCPP_ABI_MICROSOFT 231# else 232# define _LIBCPP_ABI_ITANIUM 233# endif 234# endif 235 236# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 237# define _LIBCPP_ABI_VCRUNTIME 238# endif 239 240// Need to detect which libc we're using if we're on Linux. 241# if defined(__linux__) 242# include <features.h> 243# if defined(__GLIBC_PREREQ) 244# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 245# else 246# define _LIBCPP_GLIBC_PREREQ(a, b) 0 247# endif // defined(__GLIBC_PREREQ) 248# endif // defined(__linux__) 249 250# if defined(__MVS__) 251# include <features.h> // for __NATIVE_ASCII_F 252# endif 253 254# ifdef __LITTLE_ENDIAN__ 255# if __LITTLE_ENDIAN__ 256# define _LIBCPP_LITTLE_ENDIAN 257# endif // __LITTLE_ENDIAN__ 258# endif // __LITTLE_ENDIAN__ 259 260# ifdef __BIG_ENDIAN__ 261# if __BIG_ENDIAN__ 262# define _LIBCPP_BIG_ENDIAN 263# endif // __BIG_ENDIAN__ 264# endif // __BIG_ENDIAN__ 265 266# ifdef __BYTE_ORDER__ 267# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 268# define _LIBCPP_LITTLE_ENDIAN 269# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 270# define _LIBCPP_BIG_ENDIAN 271# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 272# endif // __BYTE_ORDER__ 273 274# ifdef __FreeBSD__ 275# include <sys/endian.h> 276# include <osreldate.h> 277# if _BYTE_ORDER == _LITTLE_ENDIAN 278# define _LIBCPP_LITTLE_ENDIAN 279# else // _BYTE_ORDER == _LITTLE_ENDIAN 280# define _LIBCPP_BIG_ENDIAN 281# endif // _BYTE_ORDER == _LITTLE_ENDIAN 282# endif // __FreeBSD__ 283 284# if defined(__NetBSD__) || defined(__OpenBSD__) 285# include <sys/endian.h> 286# if _BYTE_ORDER == _LITTLE_ENDIAN 287# define _LIBCPP_LITTLE_ENDIAN 288# else // _BYTE_ORDER == _LITTLE_ENDIAN 289# define _LIBCPP_BIG_ENDIAN 290# endif // _BYTE_ORDER == _LITTLE_ENDIAN 291# endif // defined(__NetBSD__) || defined(__OpenBSD__) 292 293# if defined(_WIN32) 294# define _LIBCPP_WIN32API 295# define _LIBCPP_LITTLE_ENDIAN 296# define _LIBCPP_SHORT_WCHAR 1 297// Both MinGW and native MSVC provide a "MSVC"-like environment 298# define _LIBCPP_MSVCRT_LIKE 299// If mingw not explicitly detected, assume using MS C runtime only if 300// a MS compatibility version is specified. 301# if defined(_MSC_VER) && !defined(__MINGW32__) 302# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 303# endif 304# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 305# define _LIBCPP_HAS_BITSCAN64 306# endif 307# define _LIBCPP_HAS_OPEN_WITH_WCHAR 308# endif // defined(_WIN32) 309 310# ifdef __sun__ 311# include <sys/isa_defs.h> 312# ifdef _LITTLE_ENDIAN 313# define _LIBCPP_LITTLE_ENDIAN 314# else 315# define _LIBCPP_BIG_ENDIAN 316# endif 317# endif // __sun__ 318 319# if defined(_AIX) && !defined(__64BIT__) 320// The size of wchar is 2 byte on 32-bit mode on AIX. 321# define _LIBCPP_SHORT_WCHAR 1 322# endif 323 324// Libc++ supports various implementations of std::random_device. 325// 326// _LIBCPP_USING_DEV_RANDOM 327// Read entropy from the given file, by default `/dev/urandom`. 328// If a token is provided, it is assumed to be the path to a file 329// to read entropy from. This is the default behavior if nothing 330// else is specified. This implementation requires storing state 331// inside `std::random_device`. 332// 333// _LIBCPP_USING_ARC4_RANDOM 334// Use arc4random(). This allows obtaining random data even when 335// using sandboxing mechanisms. On some platforms like Apple, this 336// is the recommended source of entropy for user-space programs. 337// When this option is used, the token passed to `std::random_device`'s 338// constructor *must* be "/dev/urandom" -- anything else is an error. 339// 340// _LIBCPP_USING_GETENTROPY 341// Use getentropy(). 342// When this option is used, the token passed to `std::random_device`'s 343// constructor *must* be "/dev/urandom" -- anything else is an error. 344// 345// _LIBCPP_USING_FUCHSIA_CPRNG 346// Use Fuchsia's zx_cprng_draw() system call, which is specified to 347// deliver high-quality entropy and cannot fail. 348// When this option is used, the token passed to `std::random_device`'s 349// constructor *must* be "/dev/urandom" -- anything else is an error. 350// 351// _LIBCPP_USING_NACL_RANDOM 352// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 353// including accesses to the special files under `/dev`. This implementation 354// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 355// When this option is used, the token passed to `std::random_device`'s 356// constructor *must* be "/dev/urandom" -- anything else is an error. 357// 358// _LIBCPP_USING_WIN32_RANDOM 359// Use rand_s(), for use on Windows. 360// When this option is used, the token passed to `std::random_device`'s 361// constructor *must* be "/dev/urandom" -- anything else is an error. 362# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 363 defined(__DragonFly__) || defined(__sun__) 364# define _LIBCPP_USING_ARC4_RANDOM 365# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 366# define _LIBCPP_USING_GETENTROPY 367# elif defined(__Fuchsia__) 368# define _LIBCPP_USING_FUCHSIA_CPRNG 369# elif defined(__native_client__) 370# define _LIBCPP_USING_NACL_RANDOM 371# elif defined(_LIBCPP_WIN32API) 372# define _LIBCPP_USING_WIN32_RANDOM 373# else 374# define _LIBCPP_USING_DEV_RANDOM 375# endif 376 377# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 378# include <endian.h> 379# if __BYTE_ORDER == __LITTLE_ENDIAN 380# define _LIBCPP_LITTLE_ENDIAN 381# elif __BYTE_ORDER == __BIG_ENDIAN 382# define _LIBCPP_BIG_ENDIAN 383# else // __BYTE_ORDER == __BIG_ENDIAN 384# error unable to determine endian 385# endif 386# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 387 388# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 389# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 390# else 391# define _LIBCPP_NO_CFI 392# endif 393 394# ifndef _LIBCPP_CXX03_LANG 395# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 396# elif defined(_LIBCPP_COMPILER_CLANG_BASED) 397# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 398# else 399# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 400# endif 401 402# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 403 404# if defined(_LIBCPP_COMPILER_CLANG_BASED) 405 406# if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 407# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 408# endif 409 410# if __has_feature(cxx_alignas) 411# define _ALIGNAS_TYPE(x) alignas(x) 412# define _ALIGNAS(x) alignas(x) 413# else 414# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 415# define _ALIGNAS(x) __attribute__((__aligned__(x))) 416# endif 417 418# if __cplusplus < 201103L 419typedef __char16_t char16_t; 420typedef __char32_t char32_t; 421# endif 422 423# if !__has_feature(cxx_exceptions) 424# define _LIBCPP_NO_EXCEPTIONS 425# endif 426 427# if __has_feature(cxx_attributes) 428# define _LIBCPP_NORETURN [[noreturn]] 429# else 430# define _LIBCPP_NORETURN __attribute__((noreturn)) 431# endif 432 433# ifdef _LIBCPP_CXX03_LANG 434# define nullptr __nullptr 435# endif 436 437// Objective-C++ features (opt-in) 438# if __has_feature(objc_arc) 439# define _LIBCPP_HAS_OBJC_ARC 440# endif 441 442# if __has_feature(objc_arc_weak) 443# define _LIBCPP_HAS_OBJC_ARC_WEAK 444# endif 445 446# if __has_extension(blocks) 447# define _LIBCPP_HAS_EXTENSION_BLOCKS 448# endif 449 450# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 451# define _LIBCPP_HAS_BLOCKS_RUNTIME 452# endif 453 454# if !(__has_feature(cxx_noexcept)) 455# define _LIBCPP_HAS_NO_NOEXCEPT 456# endif 457 458# if !__has_feature(address_sanitizer) 459# define _LIBCPP_HAS_NO_ASAN 460# endif 461 462// Allow for build-time disabling of unsigned integer sanitization 463# if __has_attribute(no_sanitize) 464# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 465# endif 466 467# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 468 469# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 470 471# elif defined(_LIBCPP_COMPILER_GCC) 472 473# define _ALIGNAS(x) __attribute__((__aligned__(x))) 474# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 475 476# define _LIBCPP_NORETURN __attribute__((noreturn)) 477 478# if !defined(__EXCEPTIONS) 479# define _LIBCPP_NO_EXCEPTIONS 480# endif 481 482# if !defined(__SANITIZE_ADDRESS__) 483# define _LIBCPP_HAS_NO_ASAN 484# endif 485 486# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 487 488# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 489 490# elif defined(_LIBCPP_COMPILER_MSVC) 491 492# define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 493 494# if _MSC_VER < 1900 495# error "MSVC versions prior to Visual Studio 2015 are not supported" 496# endif 497 498# define __alignof__ __alignof 499# define _LIBCPP_NORETURN __declspec(noreturn) 500# define _ALIGNAS(x) __declspec(align(x)) 501# define _ALIGNAS_TYPE(x) alignas(x) 502 503# define _LIBCPP_WEAK 504 505# define _LIBCPP_HAS_NO_ASAN 506 507# define _LIBCPP_ALWAYS_INLINE __forceinline 508 509# define _LIBCPP_HAS_NO_VECTOR_EXTENSION 510 511# define _LIBCPP_DISABLE_EXTENSION_WARNING 512 513# elif defined(_LIBCPP_COMPILER_IBM) 514 515# define _ALIGNAS(x) __attribute__((__aligned__(x))) 516# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 517# define _ATTRIBUTE(x) __attribute__((x)) 518# define _LIBCPP_NORETURN __attribute__((noreturn)) 519 520# define _LIBCPP_HAS_NO_UNICODE_CHARS 521 522# if defined(_AIX) 523# define __MULTILOCALE_API 524# endif 525 526# define _LIBCPP_HAS_NO_ASAN 527 528# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 529 530# define _LIBCPP_HAS_NO_VECTOR_EXTENSION 531 532# define _LIBCPP_DISABLE_EXTENSION_WARNING 533 534# endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 535 536# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 537 538# ifdef _DLL 539# define _LIBCPP_CRT_FUNC __declspec(dllimport) 540# else 541# define _LIBCPP_CRT_FUNC 542# endif 543 544# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 545# define _LIBCPP_DLL_VIS 546# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 547# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 548# define _LIBCPP_OVERRIDABLE_FUNC_VIS 549# define _LIBCPP_EXPORTED_FROM_ABI 550# elif defined(_LIBCPP_BUILDING_LIBRARY) 551# define _LIBCPP_DLL_VIS __declspec(dllexport) 552# if defined(__MINGW32__) 553# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 554# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 555# else 556# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 557# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 558# endif 559# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 560# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 561# else 562# define _LIBCPP_DLL_VIS __declspec(dllimport) 563# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 564# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 565# define _LIBCPP_OVERRIDABLE_FUNC_VIS 566# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 567# endif 568 569# define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 570# define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 571# define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 572# define _LIBCPP_HIDDEN 573# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 574# define _LIBCPP_TEMPLATE_VIS 575# define _LIBCPP_TEMPLATE_DATA_VIS 576# define _LIBCPP_ENUM_VIS 577 578# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 579 580# ifndef _LIBCPP_HIDDEN 581# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 582# define _LIBCPP_HIDDEN __attribute__((__visibility__("hidden"))) 583# else 584# define _LIBCPP_HIDDEN 585# endif 586# endif 587 588# ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 589# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 590// The inline should be removed once PR32114 is resolved 591# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 592# else 593# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 594# endif 595# endif 596 597# ifndef _LIBCPP_FUNC_VIS 598# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 599# define _LIBCPP_FUNC_VIS __attribute__((__visibility__("default"))) 600# else 601# define _LIBCPP_FUNC_VIS 602# endif 603# endif 604 605# ifndef _LIBCPP_TYPE_VIS 606# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 607# define _LIBCPP_TYPE_VIS __attribute__((__visibility__("default"))) 608# else 609# define _LIBCPP_TYPE_VIS 610# endif 611# endif 612 613# ifndef _LIBCPP_TEMPLATE_VIS 614# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 615# if __has_attribute(__type_visibility__) 616# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default"))) 617# else 618# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 619# endif 620# else 621# define _LIBCPP_TEMPLATE_VIS 622# endif 623# endif 624 625# ifndef _LIBCPP_TEMPLATE_DATA_VIS 626# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 627# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__((__visibility__("default"))) 628# else 629# define _LIBCPP_TEMPLATE_DATA_VIS 630# endif 631# endif 632 633# ifndef _LIBCPP_EXPORTED_FROM_ABI 634# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 635# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 636# else 637# define _LIBCPP_EXPORTED_FROM_ABI 638# endif 639# endif 640 641# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 642# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 643# endif 644 645# ifndef _LIBCPP_EXCEPTION_ABI 646# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 647# define _LIBCPP_EXCEPTION_ABI __attribute__((__visibility__("default"))) 648# else 649# define _LIBCPP_EXCEPTION_ABI 650# endif 651# endif 652 653# ifndef _LIBCPP_ENUM_VIS 654# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 655# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default"))) 656# else 657# define _LIBCPP_ENUM_VIS 658# endif 659# endif 660 661# ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 662# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 663# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__((__visibility__("default"))) 664# else 665# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 666# endif 667# endif 668 669# ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 670# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 671# endif 672 673# if __has_attribute(internal_linkage) 674# define _LIBCPP_INTERNAL_LINKAGE __attribute__((internal_linkage)) 675# else 676# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 677# endif 678 679# if __has_attribute(exclude_from_explicit_instantiation) 680# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 681# else 682// Try to approximate the effect of exclude_from_explicit_instantiation 683// (which is that entities are not assumed to be provided by explicit 684// template instantiations in the dylib) by always inlining those entities. 685# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 686# endif 687 688# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 689# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 690# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 691# else 692# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 693# endif 694# endif 695 696# ifndef _LIBCPP_HIDE_FROM_ABI 697# if _LIBCPP_HIDE_FROM_ABI_PER_TU 698# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 699# else 700# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 701# endif 702# endif 703 704# ifdef _LIBCPP_BUILDING_LIBRARY 705# if _LIBCPP_ABI_VERSION > 1 706# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 707# else 708# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 709# endif 710# else 711# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 712# endif 713 714// Just so we can migrate to the new macros gradually. 715# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 716 717// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 718// clang-format off 719# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 720# define _LIBCPP_END_NAMESPACE_STD }} 721# define _VSTD std 722 723_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 724 725# if _LIBCPP_STD_VER > 14 726# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 727 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 728# else 729# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 730 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 731# endif 732 733# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} 734// clang-format on 735 736# define _VSTD_FS std::__fs::filesystem 737 738# if __has_attribute(__enable_if__) 739# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 740# endif 741 742# ifndef _LIBCPP_HAS_NO_NOEXCEPT 743# define _NOEXCEPT noexcept 744# define _NOEXCEPT_(x) noexcept(x) 745# else 746# define _NOEXCEPT throw() 747# define _NOEXCEPT_(x) 748# endif 749 750# ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 751 typedef unsigned short char16_t; 752typedef unsigned int char32_t; 753# endif 754 755# ifndef __SIZEOF_INT128__ 756# define _LIBCPP_HAS_NO_INT128 757# endif 758 759# ifdef _LIBCPP_CXX03_LANG 760# define static_assert(...) _Static_assert(__VA_ARGS__) 761# define decltype(...) __decltype(__VA_ARGS__) 762# endif // _LIBCPP_CXX03_LANG 763 764# ifdef _LIBCPP_CXX03_LANG 765# define _LIBCPP_CONSTEXPR 766# else 767# define _LIBCPP_CONSTEXPR constexpr 768# endif 769 770# ifndef __cpp_consteval 771# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 772# else 773# define _LIBCPP_CONSTEVAL consteval 774# endif 775 776# ifdef __GNUC__ 777# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 778# else 779# define _LIBCPP_NOALIAS 780# endif 781 782# if __has_attribute(using_if_exists) 783# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 784# else 785# define _LIBCPP_USING_IF_EXISTS 786# endif 787 788# ifdef _LIBCPP_CXX03_LANG 789# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 790 struct _LIBCPP_TYPE_VIS x { \ 791 enum __lx 792// clang-format off 793# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 794 __lx __v_; \ 795 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 796 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 797 _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \ 798 }; 799// clang-format on 800 801# else // _LIBCPP_CXX03_LANG 802# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 803# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 804# endif // _LIBCPP_CXX03_LANG 805 806# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \ 807 defined(__NetBSD__) 808# define _LIBCPP_LOCALE__L_EXTENSIONS 1 809# endif 810 811# ifdef __FreeBSD__ 812# define _DECLARE_C99_LDBL_MATH 1 813# endif 814 815// If we are getting operator new from the MSVC CRT, then allocation overloads 816// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 817# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 818# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 819# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 820// We're deferring to Microsoft's STL to provide aligned new et al. We don't 821// have it unless the language feature test macro is defined. 822# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 823# elif defined(__MVS__) 824# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 825# endif 826 827# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 828# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 829# endif 830 831# if defined(__APPLE__) || defined(__FreeBSD__) 832# define _LIBCPP_HAS_DEFAULTRUNELOCALE 833# endif 834 835# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 836# define _LIBCPP_WCTYPE_IS_MASK 837# endif 838 839# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 840# define _LIBCPP_HAS_NO_CHAR8_T 841# endif 842 843// Deprecation macros. 844// 845// Deprecations warnings are always enabled, except when users explicitly opt-out 846// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 847# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 848# if __has_attribute(deprecated) 849# define _LIBCPP_DEPRECATED __attribute__((deprecated)) 850# elif _LIBCPP_STD_VER > 11 851# define _LIBCPP_DEPRECATED [[deprecated]] 852# else 853# define _LIBCPP_DEPRECATED 854# endif 855# else 856# define _LIBCPP_DEPRECATED 857# endif 858 859# if !defined(_LIBCPP_CXX03_LANG) 860# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 861# else 862# define _LIBCPP_DEPRECATED_IN_CXX11 863# endif 864 865# if _LIBCPP_STD_VER > 11 866# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 867# else 868# define _LIBCPP_DEPRECATED_IN_CXX14 869# endif 870 871# if _LIBCPP_STD_VER > 14 872# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 873# else 874# define _LIBCPP_DEPRECATED_IN_CXX17 875# endif 876 877# if _LIBCPP_STD_VER > 17 878# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 879# else 880# define _LIBCPP_DEPRECATED_IN_CXX20 881# endif 882 883# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 884# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 885# else 886# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 887# endif 888 889// Macros to enter and leave a state where deprecation warnings are suppressed. 890# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 891# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 892 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 893 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 894# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 895# else 896# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 897# define _LIBCPP_SUPPRESS_DEPRECATED_POP 898# endif 899 900# if _LIBCPP_STD_VER <= 11 901# define _LIBCPP_EXPLICIT_AFTER_CXX11 902# else 903# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 904# endif 905 906# if _LIBCPP_STD_VER > 11 907# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 908# else 909# define _LIBCPP_CONSTEXPR_AFTER_CXX11 910# endif 911 912# if _LIBCPP_STD_VER > 14 913# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 914# else 915# define _LIBCPP_CONSTEXPR_AFTER_CXX14 916# endif 917 918# if _LIBCPP_STD_VER > 17 919# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 920# else 921# define _LIBCPP_CONSTEXPR_AFTER_CXX17 922# endif 923 924# if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 925# define _LIBCPP_NODISCARD [[nodiscard]] 926# elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 927# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 928# else 929// We can't use GCC's [[gnu::warn_unused_result]] and 930// __attribute__((warn_unused_result)), because GCC does not silence them via 931// (void) cast. 932# define _LIBCPP_NODISCARD 933# endif 934 935// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 936// specified as such as an extension. 937# if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 938# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 939# else 940# define _LIBCPP_NODISCARD_EXT 941# endif 942 943# if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 944# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 945# else 946# define _LIBCPP_NODISCARD_AFTER_CXX17 947# endif 948 949# if __has_attribute(no_destroy) 950# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 951# else 952# define _LIBCPP_NO_DESTROY 953# endif 954 955# ifndef _LIBCPP_HAS_NO_ASAN 956extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, 957 const void*); 958# endif 959 960// Try to find out if RTTI is disabled. 961# if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 962# define _LIBCPP_NO_RTTI 963# elif defined(__GNUC__) && !defined(__GXX_RTTI) 964# define _LIBCPP_NO_RTTI 965# elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 966# define _LIBCPP_NO_RTTI 967# endif 968 969# ifndef _LIBCPP_WEAK 970# define _LIBCPP_WEAK __attribute__((__weak__)) 971# endif 972 973// Thread API 974// clang-format off 975# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 976 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 977 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 978 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 979 980# if defined(__FreeBSD__) || \ 981 defined(__wasi__) || \ 982 defined(__NetBSD__) || \ 983 defined(__OpenBSD__) || \ 984 defined(__NuttX__) || \ 985 defined(__linux__) || \ 986 defined(__GNU__) || \ 987 defined(__APPLE__) || \ 988 defined(__sun__) || \ 989 defined(__MVS__) || \ 990 defined(_AIX) || \ 991 defined(__EMSCRIPTEN__) 992// clang-format on 993# define _LIBCPP_HAS_THREAD_API_PTHREAD 994# elif defined(__Fuchsia__) 995// TODO(44575): Switch to C11 thread API when possible. 996# define _LIBCPP_HAS_THREAD_API_PTHREAD 997# elif defined(_LIBCPP_WIN32API) 998# define _LIBCPP_HAS_THREAD_API_WIN32 999# else 1000# error "No thread API" 1001# endif // _LIBCPP_HAS_THREAD_API 1002# endif // _LIBCPP_HAS_NO_THREADS 1003 1004# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1005# if defined(__ANDROID__) && __ANDROID_API__ >= 30 1006# define _LIBCPP_HAS_COND_CLOCKWAIT 1007# elif defined(_LIBCPP_GLIBC_PREREQ) 1008# if _LIBCPP_GLIBC_PREREQ(2, 30) 1009# define _LIBCPP_HAS_COND_CLOCKWAIT 1010# endif 1011# endif 1012# endif 1013 1014# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1015# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1016 _LIBCPP_HAS_NO_THREADS is not defined. 1017# endif 1018 1019# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1020# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1021 _LIBCPP_HAS_NO_THREADS is defined. 1022# endif 1023 1024# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1025# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1026 _LIBCPP_HAS_NO_THREADS is defined. 1027# endif 1028 1029# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1030# define __STDCPP_THREADS__ 1 1031# endif 1032 1033// The glibc and Bionic implementation of pthreads implements 1034// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1035// mutexes have no destroy mechanism. 1036// 1037// This optimization can't be performed on Apple platforms, where 1038// pthread_mutex_destroy can allow the kernel to release resources. 1039// See https://llvm.org/D64298 for details. 1040// 1041// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1042// respective stakeholders. 1043// clang-format off 1044# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 1045 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1046 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1047// clang-format on 1048# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1049# endif 1050 1051// Destroying a condvar is a nop on Windows. 1052// 1053// This optimization can't be performed on Apple platforms, where 1054// pthread_cond_destroy can allow the kernel to release resources. 1055// See https://llvm.org/D64298 for details. 1056// 1057// TODO(EricWF): This is potentially true for some pthread implementations 1058// as well. 1059# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1060# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1061# endif 1062 1063// Some systems do not provide gets() in their C library, for security reasons. 1064# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__) 1065# define _LIBCPP_C_HAS_NO_GETS 1066# endif 1067 1068# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 1069 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1070# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1071# endif 1072 1073# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1074# define _LIBCPP_HAS_C_ATOMIC_IMP 1075# elif defined(_LIBCPP_COMPILER_GCC) 1076# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1077# endif 1078 1079# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1080 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1081# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1082# else 1083# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1084# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1085# endif 1086# ifdef _LIBCPP_FREESTANDING 1087# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1088# endif 1089# endif 1090 1091# ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1092# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1093# endif 1094 1095# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1096# if defined(__clang__) && __has_attribute(acquire_capability) 1097// Work around the attribute handling in clang. When both __declspec and 1098// __attribute__ are present, the processing goes awry preventing the definition 1099// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1100// combining the two does work. 1101# if !defined(_MSC_VER) 1102# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1103# endif 1104# endif 1105# endif 1106 1107# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1108# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1109# else 1110# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1111# endif 1112 1113# if _LIBCPP_STD_VER > 17 1114# define _LIBCPP_CONSTINIT constinit 1115# elif __has_attribute(require_constant_initialization) 1116# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1117# else 1118# define _LIBCPP_CONSTINIT 1119# endif 1120 1121# if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1122# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1123# define _LIBCPP_DIAGNOSE_ERROR(...) __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1124# else 1125# define _LIBCPP_DIAGNOSE_WARNING(...) 1126# define _LIBCPP_DIAGNOSE_ERROR(...) 1127# endif 1128 1129// Use a function like macro to imply that it must be followed by a semicolon 1130# if _LIBCPP_STD_VER > 14 && __has_cpp_attribute(fallthrough) 1131# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1132# elif __has_cpp_attribute(clang::fallthrough) 1133# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1134# elif __has_attribute(__fallthrough__) 1135# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1136# else 1137# define _LIBCPP_FALLTHROUGH() ((void)0) 1138# endif 1139 1140# if __has_attribute(__nodebug__) 1141# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1142# else 1143# define _LIBCPP_NODEBUG 1144# endif 1145 1146# if __has_attribute(__standalone_debug__) 1147# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1148# else 1149# define _LIBCPP_STANDALONE_DEBUG 1150# endif 1151 1152# if __has_attribute(__preferred_name__) 1153# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1154# else 1155# define _LIBCPP_PREFERRED_NAME(x) 1156# endif 1157 1158// We often repeat things just for handling wide characters in the library. 1159// When wide characters are disabled, it can be useful to have a quick way of 1160// disabling it without having to resort to #if-#endif, which has a larger 1161// impact on readability. 1162# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1163# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1164# else 1165# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1166# endif 1167 1168# if defined(_LIBCPP_ABI_MICROSOFT) && (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1169# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1170# else 1171# define _LIBCPP_DECLSPEC_EMPTY_BASES 1172# endif 1173 1174# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1175# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1176# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1177# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1178# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1179# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1180 1181# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1182# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1183# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1184# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1185# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1186# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1187# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1188 1189# if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1190# define _LIBCPP_HAS_NO_CXX20_COROUTINES 1191# endif 1192 1193# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") 1194# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") 1195 1196# ifndef _LIBCPP_NO_AUTO_LINK 1197# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1198# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1199# pragma comment(lib, "c++.lib") 1200# else 1201# pragma comment(lib, "libc++.lib") 1202# endif 1203# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1204# endif // _LIBCPP_NO_AUTO_LINK 1205 1206// Configures the fopen close-on-exec mode character, if any. This string will 1207// be appended to any mode string used by fstream for fopen/fdopen. 1208// 1209// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1210// do. 1211# if defined(__BIONIC__) 1212# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1213# else 1214# define _LIBCPP_FOPEN_CLOEXEC_MODE 1215# endif 1216 1217// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1218// of functions used in cstdio may not be available for low API levels when 1219// using 64-bit file offsets on LP32. 1220# if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1221# define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1222# endif 1223 1224# if __has_attribute(init_priority) 1225// TODO: Remove this once we drop support for building libc++ with old Clangs 1226# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1227 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1228# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1229# else 1230# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1231# endif 1232# else 1233# define _LIBCPP_INIT_PRIORITY_MAX 1234# endif 1235 1236# if defined(__GNUC__) || defined(__clang__) 1237// The attribute uses 1-based indices for ordinary and static member functions. 1238// The attribute uses 2-based indices for non-static member functions. 1239# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1240 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1241# else 1242# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1243# endif 1244 1245# if __has_cpp_attribute(msvc::no_unique_address) 1246// MSVC implements [[no_unique_address]] as a silent no-op currently. 1247// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1248// However, MSVC implements [[msvc::no_unique_address]] which does what 1249// [[no_unique_address]] is supposed to do, in general. 1250 1251// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1252// [[msvc::no_unique_address]] though. If/when it does implement 1253// [[msvc::no_unique_address]], this should be preferred though. 1254# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1255# elif __has_cpp_attribute(no_unique_address) 1256# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] 1257# else 1258# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1259// Note that this can be replaced by #error as soon as clang-cl 1260// implements msvc::no_unique_address, since there should be no C++20 1261// compiler that doesn't support one of the two attributes at that point. 1262// We generally don't want to use this macro outside of C++20-only code, 1263// because using it conditionally in one language version only would make 1264// the ABI inconsistent. 1265# endif 1266 1267# ifdef _LIBCPP_COMPILER_CLANG_BASED 1268# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1269# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1270# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1271# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1272# elif defined(_LIBCPP_COMPILER_GCC) 1273# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1274# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1275# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1276# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1277# else 1278# define _LIBCPP_DIAGNOSTIC_PUSH 1279# define _LIBCPP_DIAGNOSTIC_POP 1280# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1281# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1282# endif 1283 1284# if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1285# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1286# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1287# else 1288# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1289# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1290# endif 1291 1292#endif // __cplusplus 1293 1294#endif // _LIBCPP___CONFIG 1295