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#else 56 // ... add new file formats here ... 57#endif 58 59#if _LIBCPP_ABI_VERSION >= 2 60// Change short string representation so that string data starts at offset 0, 61// improving its alignment in some cases. 62# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 63// Fix deque iterator type in order to support incomplete types. 64# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 65// Fix undefined behavior in how std::list stores its linked nodes. 66# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 67// Fix undefined behavior in how __tree stores its end and parent nodes. 68# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 69// Fix undefined behavior in how __hash_table stores its pointer types. 70# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 71# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 72# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 73// Define a key function for `bad_function_call` in the library, to centralize 74// its vtable and typeinfo to libc++ rather than having all other libraries 75// using that class define their own copies. 76# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 77// Override the default return value of exception::what() for 78// bad_function_call::what() with a string that is specific to 79// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 80// because it changes the vtable layout of bad_function_call. 81# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 82// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 83# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 84// In C++20 and later, don't derive std::plus from std::binary_function, 85// nor std::negate from std::unary_function. 86# define _LIBCPP_ABI_NO_BINDER_BASES 87// Give reverse_iterator<T> one data member of type T, not two. 88// Also, in C++17 and later, don't derive iterator types from std::iterator. 89# define _LIBCPP_ABI_NO_ITERATOR_BASES 90// Use the smallest possible integer type to represent the index of the variant. 91// Previously libc++ used "unsigned int" exclusively. 92# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 93// Unstable attempt to provide a more optimized std::function 94# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 95// All the regex constants must be distinct and nonzero. 96# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 97// Use raw pointers, not wrapped ones, for std::span's iterator type. 98# define _LIBCPP_ABI_SPAN_POINTER_ITERATORS 99// Re-worked external template instantiations for std::string with a focus on 100// performance and fast-path inlining. 101# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 102// Enable clang::trivial_abi on std::unique_ptr. 103# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 104// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 105# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 106// std::random_device holds some state when it uses an implementation that gets 107// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 108// implementation to another one on a platform that has already shipped 109// std::random_device, one needs to retain the same object layout to remain ABI 110// compatible. This switch removes these workarounds for platforms that don't care 111// about ABI compatibility. 112# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 113// Remove basic_string common base 114# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 115// Remove vector base class 116# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 117// According to the Standard, `bitset::operator[] const` returns bool 118# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 119#elif _LIBCPP_ABI_VERSION == 1 120# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 121// Enable compiling copies of now inline methods into the dylib to support 122// applications compiled against older libraries. This is unnecessary with 123// COFF dllexport semantics, since dllexport forces a non-inline definition 124// of inline functions to be emitted anyway. Our own non-inline copy would 125// conflict with the dllexport-emitted copy, so we disable it. 126# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 127# endif 128// Feature macros for disabling pre ABI v1 features. All of these options 129// are deprecated. 130# if defined(__FreeBSD__) 131# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 132# endif 133#endif 134 135#if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 136// Enable additional explicit instantiations of iostreams components. This 137// reduces the number of weak definitions generated in programs that use 138// iostreams by providing a single strong definition in the shared library. 139# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 140 141// Define a key function for `bad_function_call` in the library, to centralize 142// its vtable and typeinfo to libc++ rather than having all other libraries 143// using that class define their own copies. 144# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 145#endif 146 147#define _LIBCPP_TOSTRING2(x) #x 148#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 149 150#if __cplusplus < 201103L 151#define _LIBCPP_CXX03_LANG 152#endif 153 154#ifndef __has_attribute 155#define __has_attribute(__x) 0 156#endif 157 158#ifndef __has_builtin 159#define __has_builtin(__x) 0 160#endif 161 162#ifndef __has_extension 163#define __has_extension(__x) 0 164#endif 165 166#ifndef __has_feature 167#define __has_feature(__x) 0 168#endif 169 170#ifndef __has_cpp_attribute 171#define __has_cpp_attribute(__x) 0 172#endif 173 174// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 175// the compiler and '1' otherwise. 176#ifndef __is_identifier 177#define __is_identifier(__x) 1 178#endif 179 180#ifndef __has_declspec_attribute 181#define __has_declspec_attribute(__x) 0 182#endif 183 184#define __has_keyword(__x) !(__is_identifier(__x)) 185 186#ifndef __has_include 187#define __has_include(...) 0 188#endif 189 190#if defined(__apple_build_version__) 191# define _LIBCPP_COMPILER_CLANG_BASED 192# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 193#elif defined(__clang__) 194# define _LIBCPP_COMPILER_CLANG_BASED 195# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 196#elif defined(__GNUC__) 197# define _LIBCPP_COMPILER_GCC 198#elif defined(_MSC_VER) 199# define _LIBCPP_COMPILER_MSVC 200#elif defined(__IBMCPP__) 201# define _LIBCPP_COMPILER_IBM 202#endif 203 204#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 205#error "libc++ does not support using GCC with C++03. Please enable C++11" 206#endif 207 208// FIXME: ABI detection should be done via compiler builtin macros. This 209// is just a placeholder until Clang implements such macros. For now assume 210// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 211// and allow the user to explicitly specify the ABI to handle cases where this 212// heuristic falls short. 213#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 214# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 215#elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 216# define _LIBCPP_ABI_ITANIUM 217#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 218# define _LIBCPP_ABI_MICROSOFT 219#else 220# if defined(_WIN32) && defined(_MSC_VER) 221# define _LIBCPP_ABI_MICROSOFT 222# else 223# define _LIBCPP_ABI_ITANIUM 224# endif 225#endif 226 227#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 228# define _LIBCPP_ABI_VCRUNTIME 229#endif 230 231// Need to detect which libc we're using if we're on Linux. 232#if defined(__linux__) 233# include <features.h> 234# if defined(__GLIBC_PREREQ) 235# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 236# else 237# define _LIBCPP_GLIBC_PREREQ(a, b) 0 238# endif // defined(__GLIBC_PREREQ) 239#endif // defined(__linux__) 240 241#if defined(__MVS__) 242# include <features.h> // for __NATIVE_ASCII_F 243#endif 244 245#ifdef __LITTLE_ENDIAN__ 246# if __LITTLE_ENDIAN__ 247# define _LIBCPP_LITTLE_ENDIAN 248# endif // __LITTLE_ENDIAN__ 249#endif // __LITTLE_ENDIAN__ 250 251#ifdef __BIG_ENDIAN__ 252# if __BIG_ENDIAN__ 253# define _LIBCPP_BIG_ENDIAN 254# endif // __BIG_ENDIAN__ 255#endif // __BIG_ENDIAN__ 256 257#ifdef __BYTE_ORDER__ 258# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 259# define _LIBCPP_LITTLE_ENDIAN 260# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 261# define _LIBCPP_BIG_ENDIAN 262# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 263#endif // __BYTE_ORDER__ 264 265#ifdef __FreeBSD__ 266# include <sys/endian.h> 267# include <osreldate.h> 268# if _BYTE_ORDER == _LITTLE_ENDIAN 269# define _LIBCPP_LITTLE_ENDIAN 270# else // _BYTE_ORDER == _LITTLE_ENDIAN 271# define _LIBCPP_BIG_ENDIAN 272# endif // _BYTE_ORDER == _LITTLE_ENDIAN 273#endif // __FreeBSD__ 274 275#if defined(__NetBSD__) || defined(__OpenBSD__) 276# include <sys/endian.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 // defined(__NetBSD__) || defined(__OpenBSD__) 283 284#if defined(_WIN32) 285# define _LIBCPP_WIN32API 286# define _LIBCPP_LITTLE_ENDIAN 287# define _LIBCPP_SHORT_WCHAR 1 288// Both MinGW and native MSVC provide a "MSVC"-like environment 289# define _LIBCPP_MSVCRT_LIKE 290// If mingw not explicitly detected, assume using MS C runtime only if 291// a MS compatibility version is specified. 292# if defined(_MSC_VER) && !defined(__MINGW32__) 293# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 294# endif 295# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 296# define _LIBCPP_HAS_BITSCAN64 297# endif 298# define _LIBCPP_HAS_OPEN_WITH_WCHAR 299#endif // defined(_WIN32) 300 301#ifdef __sun__ 302# include <sys/isa_defs.h> 303# ifdef _LITTLE_ENDIAN 304# define _LIBCPP_LITTLE_ENDIAN 305# else 306# define _LIBCPP_BIG_ENDIAN 307# endif 308#endif // __sun__ 309 310#if defined(_AIX) && !defined(__64BIT__) 311 // The size of wchar is 2 byte on 32-bit mode on AIX. 312# define _LIBCPP_SHORT_WCHAR 1 313#endif 314 315// Libc++ supports various implementations of std::random_device. 316// 317// _LIBCPP_USING_DEV_RANDOM 318// Read entropy from the given file, by default `/dev/urandom`. 319// If a token is provided, it is assumed to be the path to a file 320// to read entropy from. This is the default behavior if nothing 321// else is specified. This implementation requires storing state 322// inside `std::random_device`. 323// 324// _LIBCPP_USING_ARC4_RANDOM 325// Use arc4random(). This allows obtaining random data even when 326// using sandboxing mechanisms. On some platforms like Apple, this 327// is the recommended source of entropy for user-space programs. 328// When this option is used, the token passed to `std::random_device`'s 329// constructor *must* be "/dev/urandom" -- anything else is an error. 330// 331// _LIBCPP_USING_GETENTROPY 332// Use getentropy(). 333// When this option is used, the token passed to `std::random_device`'s 334// constructor *must* be "/dev/urandom" -- anything else is an error. 335// 336// _LIBCPP_USING_FUCHSIA_CPRNG 337// Use Fuchsia's zx_cprng_draw() system call, which is specified to 338// deliver high-quality entropy and cannot fail. 339// When this option is used, the token passed to `std::random_device`'s 340// constructor *must* be "/dev/urandom" -- anything else is an error. 341// 342// _LIBCPP_USING_NACL_RANDOM 343// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 344// including accesses to the special files under `/dev`. This implementation 345// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 346// When this option is used, the token passed to `std::random_device`'s 347// constructor *must* be "/dev/urandom" -- anything else is an error. 348// 349// _LIBCPP_USING_WIN32_RANDOM 350// Use rand_s(), for use on Windows. 351// When this option is used, the token passed to `std::random_device`'s 352// constructor *must* be "/dev/urandom" -- anything else is an error. 353#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || \ 354 defined(__OpenBSD__) || defined(__DragonFly__) 355# define _LIBCPP_USING_ARC4_RANDOM 356#elif defined(__wasi__) 357# define _LIBCPP_USING_GETENTROPY 358#elif defined(__Fuchsia__) 359# define _LIBCPP_USING_FUCHSIA_CPRNG 360#elif defined(__native_client__) 361# define _LIBCPP_USING_NACL_RANDOM 362#elif defined(_LIBCPP_WIN32API) 363# define _LIBCPP_USING_WIN32_RANDOM 364#else 365# define _LIBCPP_USING_DEV_RANDOM 366#endif 367 368#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 369# include <endian.h> 370# if __BYTE_ORDER == __LITTLE_ENDIAN 371# define _LIBCPP_LITTLE_ENDIAN 372# elif __BYTE_ORDER == __BIG_ENDIAN 373# define _LIBCPP_BIG_ENDIAN 374# else // __BYTE_ORDER == __BIG_ENDIAN 375# error unable to determine endian 376# endif 377#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 378 379#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 380# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 381#else 382# define _LIBCPP_NO_CFI 383#endif 384 385#ifndef _LIBCPP_CXX03_LANG 386# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 387#elif defined(_LIBCPP_COMPILER_CLANG_BASED) 388# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 389#else 390# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 391#endif 392 393#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 394 395#if defined(_LIBCPP_COMPILER_CLANG_BASED) 396 397#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 398 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 399# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 400#endif 401 402#if __has_feature(cxx_alignas) 403# define _ALIGNAS_TYPE(x) alignas(x) 404# define _ALIGNAS(x) alignas(x) 405#else 406# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 407# define _ALIGNAS(x) __attribute__((__aligned__(x))) 408#endif 409 410#if __cplusplus < 201103L 411typedef __char16_t char16_t; 412typedef __char32_t char32_t; 413#endif 414 415#if !__has_feature(cxx_exceptions) 416# define _LIBCPP_NO_EXCEPTIONS 417#endif 418 419#if __has_feature(cxx_attributes) 420# define _LIBCPP_NORETURN [[noreturn]] 421#else 422# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 423#endif 424 425#ifdef _LIBCPP_CXX03_LANG 426# define nullptr __nullptr 427#endif 428 429// Objective-C++ features (opt-in) 430#if __has_feature(objc_arc) 431#define _LIBCPP_HAS_OBJC_ARC 432#endif 433 434#if __has_feature(objc_arc_weak) 435#define _LIBCPP_HAS_OBJC_ARC_WEAK 436#endif 437 438#if __has_extension(blocks) 439# define _LIBCPP_HAS_EXTENSION_BLOCKS 440#endif 441 442#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 443# define _LIBCPP_HAS_BLOCKS_RUNTIME 444#endif 445 446#if !(__has_feature(cxx_noexcept)) 447#define _LIBCPP_HAS_NO_NOEXCEPT 448#endif 449 450#if !__has_feature(address_sanitizer) 451#define _LIBCPP_HAS_NO_ASAN 452#endif 453 454// Allow for build-time disabling of unsigned integer sanitization 455#if __has_attribute(no_sanitize) 456#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 457#endif 458 459#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 460 461#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 462 463#elif defined(_LIBCPP_COMPILER_GCC) 464 465#define _ALIGNAS(x) __attribute__((__aligned__(x))) 466#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 467 468#define _LIBCPP_NORETURN __attribute__((noreturn)) 469 470#if !defined(__EXCEPTIONS) 471# define _LIBCPP_NO_EXCEPTIONS 472#endif 473 474#if !defined(__SANITIZE_ADDRESS__) 475#define _LIBCPP_HAS_NO_ASAN 476#endif 477 478#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 479 480#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 481 482#elif defined(_LIBCPP_COMPILER_MSVC) 483 484#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 485 486#if _MSC_VER < 1900 487#error "MSVC versions prior to Visual Studio 2015 are not supported" 488#endif 489 490#define __alignof__ __alignof 491#define _LIBCPP_NORETURN __declspec(noreturn) 492#define _ALIGNAS(x) __declspec(align(x)) 493#define _ALIGNAS_TYPE(x) alignas(x) 494 495#define _LIBCPP_WEAK 496 497#define _LIBCPP_HAS_NO_ASAN 498 499#define _LIBCPP_ALWAYS_INLINE __forceinline 500 501#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 502 503#define _LIBCPP_DISABLE_EXTENSION_WARNING 504 505#elif defined(_LIBCPP_COMPILER_IBM) 506 507#define _ALIGNAS(x) __attribute__((__aligned__(x))) 508#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 509#define _ATTRIBUTE(x) __attribute__((x)) 510#define _LIBCPP_NORETURN __attribute__((noreturn)) 511 512#define _LIBCPP_HAS_NO_UNICODE_CHARS 513 514#if defined(_AIX) 515#define __MULTILOCALE_API 516#endif 517 518#define _LIBCPP_HAS_NO_ASAN 519 520#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 521 522#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 523 524#define _LIBCPP_DISABLE_EXTENSION_WARNING 525 526#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 527 528#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 529 530#ifdef _DLL 531# define _LIBCPP_CRT_FUNC __declspec(dllimport) 532#else 533# define _LIBCPP_CRT_FUNC 534#endif 535 536#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 537# define _LIBCPP_DLL_VIS 538# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 539# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 540# define _LIBCPP_OVERRIDABLE_FUNC_VIS 541# define _LIBCPP_EXPORTED_FROM_ABI 542#elif defined(_LIBCPP_BUILDING_LIBRARY) 543# define _LIBCPP_DLL_VIS __declspec(dllexport) 544# if defined(__MINGW32__) 545# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 546# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 547# else 548# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 549# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 550# endif 551# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 552# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 553#else 554# define _LIBCPP_DLL_VIS __declspec(dllimport) 555# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 556# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 557# define _LIBCPP_OVERRIDABLE_FUNC_VIS 558# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 559#endif 560 561#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 562#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 563#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 564#define _LIBCPP_HIDDEN 565#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 566#define _LIBCPP_TEMPLATE_VIS 567#define _LIBCPP_TEMPLATE_DATA_VIS 568#define _LIBCPP_ENUM_VIS 569 570#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 571 572#ifndef _LIBCPP_HIDDEN 573# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 574# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 575# else 576# define _LIBCPP_HIDDEN 577# endif 578#endif 579 580#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 581# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 582// The inline should be removed once PR32114 is resolved 583# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 584# else 585# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 586# endif 587#endif 588 589#ifndef _LIBCPP_FUNC_VIS 590# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 591# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 592# else 593# define _LIBCPP_FUNC_VIS 594# endif 595#endif 596 597#ifndef _LIBCPP_TYPE_VIS 598# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 599# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 600# else 601# define _LIBCPP_TYPE_VIS 602# endif 603#endif 604 605#ifndef _LIBCPP_TEMPLATE_VIS 606# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 607# if __has_attribute(__type_visibility__) 608# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 609# else 610# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 611# endif 612# else 613# define _LIBCPP_TEMPLATE_VIS 614# endif 615#endif 616 617#ifndef _LIBCPP_TEMPLATE_DATA_VIS 618# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 619# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) 620# else 621# define _LIBCPP_TEMPLATE_DATA_VIS 622# endif 623#endif 624 625#ifndef _LIBCPP_EXPORTED_FROM_ABI 626# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 627# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 628# else 629# define _LIBCPP_EXPORTED_FROM_ABI 630# endif 631#endif 632 633#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 634#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 635#endif 636 637#ifndef _LIBCPP_EXCEPTION_ABI 638# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 639# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 640# else 641# define _LIBCPP_EXCEPTION_ABI 642# endif 643#endif 644 645#ifndef _LIBCPP_ENUM_VIS 646# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 647# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 648# else 649# define _LIBCPP_ENUM_VIS 650# endif 651#endif 652 653#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 654# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 655# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 656# else 657# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 658# endif 659#endif 660 661#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 662#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 663#endif 664 665#if __has_attribute(internal_linkage) 666# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 667#else 668# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 669#endif 670 671#if __has_attribute(exclude_from_explicit_instantiation) 672# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 673#else 674 // Try to approximate the effect of exclude_from_explicit_instantiation 675 // (which is that entities are not assumed to be provided by explicit 676 // template instantiations in the dylib) by always inlining those entities. 677# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 678#endif 679 680#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 681# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 682# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 683# else 684# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 685# endif 686#endif 687 688#ifndef _LIBCPP_HIDE_FROM_ABI 689# if _LIBCPP_HIDE_FROM_ABI_PER_TU 690# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 691# else 692# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 693# endif 694#endif 695 696#ifdef _LIBCPP_BUILDING_LIBRARY 697# if _LIBCPP_ABI_VERSION > 1 698# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 699# else 700# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 701# endif 702#else 703# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 704#endif 705 706// Just so we can migrate to the new macros gradually. 707#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 708 709// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 710#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 711#define _LIBCPP_END_NAMESPACE_STD } } 712#define _VSTD std 713_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 714 715#if _LIBCPP_STD_VER > 14 716#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 717 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 718#else 719#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 720 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 721#endif 722 723#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 724 _LIBCPP_END_NAMESPACE_STD } } 725 726#define _VSTD_FS std::__fs::filesystem 727 728#if __has_attribute(__enable_if__) 729# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 730#endif 731 732#ifndef _LIBCPP_HAS_NO_NOEXCEPT 733# define _NOEXCEPT noexcept 734# define _NOEXCEPT_(x) noexcept(x) 735#else 736# define _NOEXCEPT throw() 737# define _NOEXCEPT_(x) 738#endif 739 740#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 741typedef unsigned short char16_t; 742typedef unsigned int char32_t; 743#endif 744 745#ifndef __SIZEOF_INT128__ 746#define _LIBCPP_HAS_NO_INT128 747#endif 748 749#ifdef _LIBCPP_CXX03_LANG 750# define static_assert(...) _Static_assert(__VA_ARGS__) 751# define decltype(...) __decltype(__VA_ARGS__) 752#endif // _LIBCPP_CXX03_LANG 753 754#ifdef _LIBCPP_CXX03_LANG 755# define _LIBCPP_CONSTEXPR 756#else 757# define _LIBCPP_CONSTEXPR constexpr 758#endif 759 760#ifndef __cpp_consteval 761# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 762#else 763# define _LIBCPP_CONSTEVAL consteval 764#endif 765 766#ifdef __GNUC__ 767# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 768#else 769# define _LIBCPP_NOALIAS 770#endif 771 772#if __has_attribute(using_if_exists) 773# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 774#else 775# define _LIBCPP_USING_IF_EXISTS 776#endif 777 778#ifdef _LIBCPP_CXX03_LANG 779# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 780# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 781 __lx __v_; \ 782 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 783 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 784 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 785 }; 786#else // _LIBCPP_CXX03_LANG 787# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 788# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 789#endif // _LIBCPP_CXX03_LANG 790 791// _LIBCPP_DEBUG potential values: 792// - undefined: No assertions. This is the default. 793// - 0: Basic assertions 794// - 1: Basic assertions + iterator validity checks + unspecified behavior randomization. 795# if !defined(_LIBCPP_DEBUG) 796# define _LIBCPP_DEBUG_LEVEL 0 797# elif _LIBCPP_DEBUG == 0 798# define _LIBCPP_DEBUG_LEVEL 1 799# elif _LIBCPP_DEBUG == 1 800# define _LIBCPP_DEBUG_LEVEL 2 801# else 802# error Supported values for _LIBCPP_DEBUG are 0 and 1 803# endif 804 805# if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG) 806# define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY 807# endif 808 809# if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY) 810# if defined(_LIBCPP_CXX03_LANG) 811# error Support for unspecified stability is only for C++11 and higher 812# endif 813# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 814 do { \ 815 if (!__builtin_is_constant_evaluated()) \ 816 _VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \ 817 } while (false) 818# else 819# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 820 do { \ 821 } while (false) 822# endif 823 824// Libc++ allows disabling extern template instantiation declarations by 825// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. 826// 827// Furthermore, when the Debug mode is enabled, we disable extern declarations 828// when building user code because we don't want to use the functions compiled 829// in the library, which might not have had the debug mode enabled when built. 830// However, some extern declarations need to be used, because code correctness 831// depends on it (several instances in <locale>). Those special declarations 832// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled 833// even when the debug mode is enabled. 834#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) 835# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 836# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ 837#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) 838# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 839# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 840#else 841# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 842# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 843#endif 844 845#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 846 defined(__sun__) || defined(__NetBSD__) 847#define _LIBCPP_LOCALE__L_EXTENSIONS 1 848#endif 849 850#ifdef __FreeBSD__ 851#define _DECLARE_C99_LDBL_MATH 1 852#endif 853 854// If we are getting operator new from the MSVC CRT, then allocation overloads 855// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 856#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 857# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 858#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 859 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 860 // have it unless the language feature test macro is defined. 861# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 862#elif defined(__MVS__) 863# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 864#endif 865 866#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 867 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 868# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 869#endif 870 871#if defined(__APPLE__) || defined(__FreeBSD__) 872#define _LIBCPP_HAS_DEFAULTRUNELOCALE 873#endif 874 875#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 876#define _LIBCPP_WCTYPE_IS_MASK 877#endif 878 879#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 880#define _LIBCPP_HAS_NO_CHAR8_T 881#endif 882 883// Deprecation macros. 884// 885// Deprecations warnings are always enabled, except when users explicitly opt-out 886// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 887#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 888# if __has_attribute(deprecated) 889# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 890# elif _LIBCPP_STD_VER > 11 891# define _LIBCPP_DEPRECATED [[deprecated]] 892# else 893# define _LIBCPP_DEPRECATED 894# endif 895#else 896# define _LIBCPP_DEPRECATED 897#endif 898 899#if !defined(_LIBCPP_CXX03_LANG) 900# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 901#else 902# define _LIBCPP_DEPRECATED_IN_CXX11 903#endif 904 905#if _LIBCPP_STD_VER > 11 906# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 907#else 908# define _LIBCPP_DEPRECATED_IN_CXX14 909#endif 910 911#if _LIBCPP_STD_VER > 14 912# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 913#else 914# define _LIBCPP_DEPRECATED_IN_CXX17 915#endif 916 917#if _LIBCPP_STD_VER > 17 918# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 919#else 920# define _LIBCPP_DEPRECATED_IN_CXX20 921#endif 922 923#if !defined(_LIBCPP_HAS_NO_CHAR8_T) 924# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 925#else 926# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 927#endif 928 929// Macros to enter and leave a state where deprecation warnings are suppressed. 930#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 931# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 932 _Pragma("GCC diagnostic push") \ 933 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 934 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 935# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 936 _Pragma("GCC diagnostic pop") 937#else 938# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 939# define _LIBCPP_SUPPRESS_DEPRECATED_POP 940#endif 941 942#if _LIBCPP_STD_VER <= 11 943# define _LIBCPP_EXPLICIT_AFTER_CXX11 944#else 945# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 946#endif 947 948#if _LIBCPP_STD_VER > 11 949# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 950#else 951# define _LIBCPP_CONSTEXPR_AFTER_CXX11 952#endif 953 954#if _LIBCPP_STD_VER > 14 955# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 956#else 957# define _LIBCPP_CONSTEXPR_AFTER_CXX14 958#endif 959 960#if _LIBCPP_STD_VER > 17 961# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 962#else 963# define _LIBCPP_CONSTEXPR_AFTER_CXX17 964#endif 965 966#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 967# define _LIBCPP_NODISCARD [[nodiscard]] 968#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 969# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 970#else 971// We can't use GCC's [[gnu::warn_unused_result]] and 972// __attribute__((warn_unused_result)), because GCC does not silence them via 973// (void) cast. 974# define _LIBCPP_NODISCARD 975#endif 976 977// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 978// specified as such as an extension. 979#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 980# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 981#else 982# define _LIBCPP_NODISCARD_EXT 983#endif 984 985#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 986 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 987# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 988#else 989# define _LIBCPP_NODISCARD_AFTER_CXX17 990#endif 991 992#if __has_attribute(no_destroy) 993# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 994#else 995# define _LIBCPP_NO_DESTROY 996#endif 997 998#ifndef _LIBCPP_HAS_NO_ASAN 999extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( 1000 const void *, const void *, const void *, const void *); 1001#endif 1002 1003// Try to find out if RTTI is disabled. 1004#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 1005# define _LIBCPP_NO_RTTI 1006#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1007# define _LIBCPP_NO_RTTI 1008#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1009# define _LIBCPP_NO_RTTI 1010#endif 1011 1012#ifndef _LIBCPP_WEAK 1013#define _LIBCPP_WEAK __attribute__((__weak__)) 1014#endif 1015 1016// Thread API 1017#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1018 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1019 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1020 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1021# if defined(__FreeBSD__) || \ 1022 defined(__wasi__) || \ 1023 defined(__NetBSD__) || \ 1024 defined(__OpenBSD__) || \ 1025 defined(__NuttX__) || \ 1026 defined(__linux__) || \ 1027 defined(__GNU__) || \ 1028 defined(__APPLE__) || \ 1029 defined(__sun__) || \ 1030 defined(__MVS__) || \ 1031 defined(_AIX) 1032# define _LIBCPP_HAS_THREAD_API_PTHREAD 1033# elif defined(__Fuchsia__) 1034 // TODO(44575): Switch to C11 thread API when possible. 1035# define _LIBCPP_HAS_THREAD_API_PTHREAD 1036# elif defined(_LIBCPP_WIN32API) 1037# define _LIBCPP_HAS_THREAD_API_WIN32 1038# else 1039# error "No thread API" 1040# endif // _LIBCPP_HAS_THREAD_API 1041#endif // _LIBCPP_HAS_NO_THREADS 1042 1043#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1044#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1045#define _LIBCPP_HAS_COND_CLOCKWAIT 1046#elif defined(_LIBCPP_GLIBC_PREREQ) 1047#if _LIBCPP_GLIBC_PREREQ(2, 30) 1048#define _LIBCPP_HAS_COND_CLOCKWAIT 1049#endif 1050#endif 1051#endif 1052 1053#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1054#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1055 _LIBCPP_HAS_NO_THREADS is not defined. 1056#endif 1057 1058#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1059#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1060 _LIBCPP_HAS_NO_THREADS is defined. 1061#endif 1062 1063#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1064#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1065 _LIBCPP_HAS_NO_THREADS is defined. 1066#endif 1067 1068#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1069#define __STDCPP_THREADS__ 1 1070#endif 1071 1072// The glibc and Bionic implementation of pthreads implements 1073// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1074// mutexes have no destroy mechanism. 1075// 1076// This optimization can't be performed on Apple platforms, where 1077// pthread_mutex_destroy can allow the kernel to release resources. 1078// See https://llvm.org/D64298 for details. 1079// 1080// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1081// respective stakeholders. 1082#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1083 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1084 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1085# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1086#endif 1087 1088// Destroying a condvar is a nop on Windows. 1089// 1090// This optimization can't be performed on Apple platforms, where 1091// pthread_cond_destroy can allow the kernel to release resources. 1092// See https://llvm.org/D64298 for details. 1093// 1094// TODO(EricWF): This is potentially true for some pthread implementations 1095// as well. 1096#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1097 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1098# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1099#endif 1100 1101// Some systems do not provide gets() in their C library, for security reasons. 1102#if defined(_LIBCPP_MSVCRT) || \ 1103 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ 1104 defined(__OpenBSD__) 1105# define _LIBCPP_C_HAS_NO_GETS 1106#endif 1107 1108#if defined(__BIONIC__) || defined(__NuttX__) || \ 1109 defined(__Fuchsia__) || defined(__wasi__) || \ 1110 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1111#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1112#endif 1113 1114#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1115# define _LIBCPP_HAS_C_ATOMIC_IMP 1116#elif defined(_LIBCPP_COMPILER_GCC) 1117# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1118#endif 1119 1120#if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1121 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1122 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1123# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1124#else 1125# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1126# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1127# endif 1128# ifdef _LIBCPP_FREESTANDING 1129# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1130# endif 1131#endif 1132 1133#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1134#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1135#endif 1136 1137#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1138# if defined(__clang__) && __has_attribute(acquire_capability) 1139// Work around the attribute handling in clang. When both __declspec and 1140// __attribute__ are present, the processing goes awry preventing the definition 1141// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1142// combining the two does work. 1143# if !defined(_MSC_VER) 1144# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1145# endif 1146# endif 1147#endif 1148 1149#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1150# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1151#else 1152# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1153#endif 1154 1155#if _LIBCPP_STD_VER > 17 1156# define _LIBCPP_CONSTINIT constinit 1157#elif __has_attribute(require_constant_initialization) 1158# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1159#else 1160# define _LIBCPP_CONSTINIT 1161#endif 1162 1163#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1164# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1165 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1166# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1167 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1168#else 1169# define _LIBCPP_DIAGNOSE_WARNING(...) 1170# define _LIBCPP_DIAGNOSE_ERROR(...) 1171#endif 1172 1173// Use a function like macro to imply that it must be followed by a semicolon 1174#if _LIBCPP_STD_VER > 14 && __has_cpp_attribute(fallthrough) 1175# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1176#elif __has_cpp_attribute(clang::fallthrough) 1177# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1178#elif __has_attribute(__fallthrough__) 1179# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1180#else 1181# define _LIBCPP_FALLTHROUGH() ((void)0) 1182#endif 1183 1184#if __has_attribute(__nodebug__) 1185#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1186#else 1187#define _LIBCPP_NODEBUG 1188#endif 1189 1190#if __has_attribute(__standalone_debug__) 1191#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1192#else 1193#define _LIBCPP_STANDALONE_DEBUG 1194#endif 1195 1196#if __has_attribute(__preferred_name__) 1197#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1198#else 1199#define _LIBCPP_PREFERRED_NAME(x) 1200#endif 1201 1202// We often repeat things just for handling wide characters in the library. 1203// When wide characters are disabled, it can be useful to have a quick way of 1204// disabling it without having to resort to #if-#endif, which has a larger 1205// impact on readability. 1206#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1207# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1208#else 1209# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1210#endif 1211 1212#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1213 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1214# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1215#else 1216# define _LIBCPP_DECLSPEC_EMPTY_BASES 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#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1225 1226#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1227#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1228#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1229#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1230#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1231#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1232#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1233 1234#if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1235#define _LIBCPP_HAS_NO_CXX20_COROUTINES 1236#endif 1237 1238#if defined(_LIBCPP_COMPILER_IBM) 1239#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1240#endif 1241 1242#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1243# define _LIBCPP_PUSH_MACROS 1244# define _LIBCPP_POP_MACROS 1245#else 1246 // Don't warn about macro conflicts when we can restore them at the 1247 // end of the header. 1248# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1249# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1250# endif 1251# if defined(_LIBCPP_COMPILER_MSVC) 1252# define _LIBCPP_PUSH_MACROS \ 1253 __pragma(push_macro("min")) \ 1254 __pragma(push_macro("max")) 1255# define _LIBCPP_POP_MACROS \ 1256 __pragma(pop_macro("min")) \ 1257 __pragma(pop_macro("max")) 1258# else 1259# define _LIBCPP_PUSH_MACROS \ 1260 _Pragma("push_macro(\"min\")") \ 1261 _Pragma("push_macro(\"max\")") 1262# define _LIBCPP_POP_MACROS \ 1263 _Pragma("pop_macro(\"min\")") \ 1264 _Pragma("pop_macro(\"max\")") 1265# endif 1266#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1267 1268#ifndef _LIBCPP_NO_AUTO_LINK 1269# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1270# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1271# pragma comment(lib, "c++.lib") 1272# else 1273# pragma comment(lib, "libc++.lib") 1274# endif 1275# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1276#endif // _LIBCPP_NO_AUTO_LINK 1277 1278// Configures the fopen close-on-exec mode character, if any. This string will 1279// be appended to any mode string used by fstream for fopen/fdopen. 1280// 1281// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1282// do. 1283#if defined(__BIONIC__) 1284# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1285#else 1286# define _LIBCPP_FOPEN_CLOEXEC_MODE 1287#endif 1288 1289// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1290// of functions used in cstdio may not be available for low API levels when 1291// using 64-bit file offsets on LP32. 1292#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1293#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1294#endif 1295 1296#if __has_attribute(init_priority) 1297 // TODO: Remove this once we drop support for building libc++ with old Clangs 1298# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1299 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1300# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1301# else 1302# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1303# endif 1304#else 1305# define _LIBCPP_INIT_PRIORITY_MAX 1306#endif 1307 1308#if defined(__GNUC__) || defined(__clang__) 1309 // The attribute uses 1-based indices for ordinary and static member functions. 1310 // The attribute uses 2-based indices for non-static member functions. 1311# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1312 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1313#else 1314# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1315#endif 1316 1317#if __has_cpp_attribute(msvc::no_unique_address) 1318 // MSVC implements [[no_unique_address]] as a silent no-op currently. 1319 // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1320 // However, MSVC implements [[msvc::no_unique_address]] which does what 1321 // [[no_unique_address]] is supposed to do, in general. 1322 1323 // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1324 // [[msvc::no_unique_address]] though. If/when it does implement 1325 // [[msvc::no_unique_address]], this should be preferred though. 1326# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1327#elif __has_cpp_attribute(no_unique_address) 1328# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] 1329#else 1330# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1331 // Note that this can be replaced by #error as soon as clang-cl 1332 // implements msvc::no_unique_address, since there should be no C++20 1333 // compiler that doesn't support one of the two attributes at that point. 1334 // We generally don't want to use this macro outside of C++20-only code, 1335 // because using it conditionally in one language version only would make 1336 // the ABI inconsistent. 1337#endif 1338 1339#ifdef _LIBCPP_COMPILER_CLANG_BASED 1340# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1341# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1342# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1343# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1344#elif defined(_LIBCPP_COMPILER_GCC) 1345# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1346# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1347# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1348# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1349#else 1350# define _LIBCPP_DIAGNOSTIC_PUSH 1351# define _LIBCPP_DIAGNOSTIC_POP 1352# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1353# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1354#endif 1355 1356#if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1357# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1358# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1359#else 1360# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1361# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1362#endif 1363 1364#endif // __cplusplus 1365 1366#endif // _LIBCPP___CONFIG 1367