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(__OpenBSD__) || defined(__APPLE__) 354# define _LIBCPP_USING_ARC4_RANDOM 355#elif defined(__wasi__) 356# define _LIBCPP_USING_GETENTROPY 357#elif defined(__Fuchsia__) 358# define _LIBCPP_USING_FUCHSIA_CPRNG 359#elif defined(__native_client__) 360# define _LIBCPP_USING_NACL_RANDOM 361#elif defined(_LIBCPP_WIN32API) 362# define _LIBCPP_USING_WIN32_RANDOM 363#else 364# define _LIBCPP_USING_DEV_RANDOM 365#endif 366 367#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 368# include <endian.h> 369# if __BYTE_ORDER == __LITTLE_ENDIAN 370# define _LIBCPP_LITTLE_ENDIAN 371# elif __BYTE_ORDER == __BIG_ENDIAN 372# define _LIBCPP_BIG_ENDIAN 373# else // __BYTE_ORDER == __BIG_ENDIAN 374# error unable to determine endian 375# endif 376#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 377 378#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 379# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 380#else 381# define _LIBCPP_NO_CFI 382#endif 383 384#ifndef _LIBCPP_CXX03_LANG 385# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 386#elif defined(_LIBCPP_COMPILER_CLANG_BASED) 387# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 388#else 389# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 390#endif 391 392#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 393 394#if defined(_LIBCPP_COMPILER_CLANG_BASED) 395 396#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 397 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 398# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 399#endif 400 401#if __has_feature(cxx_alignas) 402# define _ALIGNAS_TYPE(x) alignas(x) 403# define _ALIGNAS(x) alignas(x) 404#else 405# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 406# define _ALIGNAS(x) __attribute__((__aligned__(x))) 407#endif 408 409#if __cplusplus < 201103L 410typedef __char16_t char16_t; 411typedef __char32_t char32_t; 412#endif 413 414#if !__has_feature(cxx_exceptions) 415# define _LIBCPP_NO_EXCEPTIONS 416#endif 417 418#if __has_feature(cxx_attributes) 419# define _LIBCPP_NORETURN [[noreturn]] 420#else 421# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 422#endif 423 424#ifdef _LIBCPP_CXX03_LANG 425# define nullptr __nullptr 426#endif 427 428// Objective-C++ features (opt-in) 429#if __has_feature(objc_arc) 430#define _LIBCPP_HAS_OBJC_ARC 431#endif 432 433#if __has_feature(objc_arc_weak) 434#define _LIBCPP_HAS_OBJC_ARC_WEAK 435#endif 436 437#if __has_extension(blocks) 438# define _LIBCPP_HAS_EXTENSION_BLOCKS 439#endif 440 441#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 442# define _LIBCPP_HAS_BLOCKS_RUNTIME 443#endif 444 445#if !(__has_feature(cxx_noexcept)) 446#define _LIBCPP_HAS_NO_NOEXCEPT 447#endif 448 449#if !__has_feature(address_sanitizer) 450#define _LIBCPP_HAS_NO_ASAN 451#endif 452 453// Allow for build-time disabling of unsigned integer sanitization 454#if __has_attribute(no_sanitize) 455#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 456#endif 457 458#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 459 460#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 461 462#elif defined(_LIBCPP_COMPILER_GCC) 463 464#define _ALIGNAS(x) __attribute__((__aligned__(x))) 465#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 466 467#define _LIBCPP_NORETURN __attribute__((noreturn)) 468 469#if !defined(__EXCEPTIONS) 470# define _LIBCPP_NO_EXCEPTIONS 471#endif 472 473#if !defined(__SANITIZE_ADDRESS__) 474#define _LIBCPP_HAS_NO_ASAN 475#endif 476 477#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 478 479#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 480 481#elif defined(_LIBCPP_COMPILER_MSVC) 482 483#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 484 485#if _MSC_VER < 1900 486#error "MSVC versions prior to Visual Studio 2015 are not supported" 487#endif 488 489#define __alignof__ __alignof 490#define _LIBCPP_NORETURN __declspec(noreturn) 491#define _ALIGNAS(x) __declspec(align(x)) 492#define _ALIGNAS_TYPE(x) alignas(x) 493 494#define _LIBCPP_WEAK 495 496#define _LIBCPP_HAS_NO_ASAN 497 498#define _LIBCPP_ALWAYS_INLINE __forceinline 499 500#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 501 502#define _LIBCPP_DISABLE_EXTENSION_WARNING 503 504#elif defined(_LIBCPP_COMPILER_IBM) 505 506#define _ALIGNAS(x) __attribute__((__aligned__(x))) 507#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 508#define _ATTRIBUTE(x) __attribute__((x)) 509#define _LIBCPP_NORETURN __attribute__((noreturn)) 510 511#define _LIBCPP_HAS_NO_UNICODE_CHARS 512 513#if defined(_AIX) 514#define __MULTILOCALE_API 515#endif 516 517#define _LIBCPP_HAS_NO_ASAN 518 519#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 520 521#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 522 523#define _LIBCPP_DISABLE_EXTENSION_WARNING 524 525#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 526 527#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 528 529#ifdef _DLL 530# define _LIBCPP_CRT_FUNC __declspec(dllimport) 531#else 532# define _LIBCPP_CRT_FUNC 533#endif 534 535#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 536# define _LIBCPP_DLL_VIS 537# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 538# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 539# define _LIBCPP_OVERRIDABLE_FUNC_VIS 540# define _LIBCPP_EXPORTED_FROM_ABI 541#elif defined(_LIBCPP_BUILDING_LIBRARY) 542# define _LIBCPP_DLL_VIS __declspec(dllexport) 543# if defined(__MINGW32__) 544# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 545# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 546# else 547# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 548# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 549# endif 550# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 551# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 552#else 553# define _LIBCPP_DLL_VIS __declspec(dllimport) 554# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 555# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 556# define _LIBCPP_OVERRIDABLE_FUNC_VIS 557# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 558#endif 559 560#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 561#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 562#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 563#define _LIBCPP_HIDDEN 564#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 565#define _LIBCPP_TEMPLATE_VIS 566#define _LIBCPP_TEMPLATE_DATA_VIS 567#define _LIBCPP_ENUM_VIS 568 569#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 570 571#ifndef _LIBCPP_HIDDEN 572# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 573# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 574# else 575# define _LIBCPP_HIDDEN 576# endif 577#endif 578 579#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 580# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 581// The inline should be removed once PR32114 is resolved 582# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 583# else 584# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 585# endif 586#endif 587 588#ifndef _LIBCPP_FUNC_VIS 589# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 590# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 591# else 592# define _LIBCPP_FUNC_VIS 593# endif 594#endif 595 596#ifndef _LIBCPP_TYPE_VIS 597# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 598# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 599# else 600# define _LIBCPP_TYPE_VIS 601# endif 602#endif 603 604#ifndef _LIBCPP_TEMPLATE_VIS 605# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 606# if __has_attribute(__type_visibility__) 607# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 608# else 609# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 610# endif 611# else 612# define _LIBCPP_TEMPLATE_VIS 613# endif 614#endif 615 616#ifndef _LIBCPP_TEMPLATE_DATA_VIS 617# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 618# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) 619# else 620# define _LIBCPP_TEMPLATE_DATA_VIS 621# endif 622#endif 623 624#ifndef _LIBCPP_EXPORTED_FROM_ABI 625# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 626# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 627# else 628# define _LIBCPP_EXPORTED_FROM_ABI 629# endif 630#endif 631 632#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 633#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 634#endif 635 636#ifndef _LIBCPP_EXCEPTION_ABI 637# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 638# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 639# else 640# define _LIBCPP_EXCEPTION_ABI 641# endif 642#endif 643 644#ifndef _LIBCPP_ENUM_VIS 645# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 646# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 647# else 648# define _LIBCPP_ENUM_VIS 649# endif 650#endif 651 652#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 653# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 654# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 655# else 656# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 657# endif 658#endif 659 660#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 661#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 662#endif 663 664#if __has_attribute(internal_linkage) 665# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 666#else 667# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 668#endif 669 670#if __has_attribute(exclude_from_explicit_instantiation) 671# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 672#else 673 // Try to approximate the effect of exclude_from_explicit_instantiation 674 // (which is that entities are not assumed to be provided by explicit 675 // template instantiations in the dylib) by always inlining those entities. 676# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 677#endif 678 679#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 680# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 681# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 682# else 683# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 684# endif 685#endif 686 687#ifndef _LIBCPP_HIDE_FROM_ABI 688# if _LIBCPP_HIDE_FROM_ABI_PER_TU 689# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 690# else 691# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 692# endif 693#endif 694 695#ifdef _LIBCPP_BUILDING_LIBRARY 696# if _LIBCPP_ABI_VERSION > 1 697# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 698# else 699# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 700# endif 701#else 702# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 703#endif 704 705// Just so we can migrate to the new macros gradually. 706#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 707 708// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 709#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 710#define _LIBCPP_END_NAMESPACE_STD } } 711#define _VSTD std 712_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 713 714#if _LIBCPP_STD_VER > 14 715#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 716 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 717#else 718#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 719 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 720#endif 721 722#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 723 _LIBCPP_END_NAMESPACE_STD } } 724 725#define _VSTD_FS std::__fs::filesystem 726 727#if __has_attribute(__enable_if__) 728# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 729#endif 730 731#ifndef _LIBCPP_HAS_NO_NOEXCEPT 732# define _NOEXCEPT noexcept 733# define _NOEXCEPT_(x) noexcept(x) 734#else 735# define _NOEXCEPT throw() 736# define _NOEXCEPT_(x) 737#endif 738 739#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 740typedef unsigned short char16_t; 741typedef unsigned int char32_t; 742#endif 743 744#ifndef __SIZEOF_INT128__ 745#define _LIBCPP_HAS_NO_INT128 746#endif 747 748#ifdef _LIBCPP_CXX03_LANG 749# define static_assert(...) _Static_assert(__VA_ARGS__) 750# define decltype(...) __decltype(__VA_ARGS__) 751#endif // _LIBCPP_CXX03_LANG 752 753#ifdef _LIBCPP_CXX03_LANG 754# define _LIBCPP_CONSTEXPR 755#else 756# define _LIBCPP_CONSTEXPR constexpr 757#endif 758 759#ifndef __cpp_consteval 760# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 761#else 762# define _LIBCPP_CONSTEVAL consteval 763#endif 764 765#ifdef __GNUC__ 766# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 767#else 768# define _LIBCPP_NOALIAS 769#endif 770 771#if __has_attribute(using_if_exists) 772# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 773#else 774# define _LIBCPP_USING_IF_EXISTS 775#endif 776 777#ifdef _LIBCPP_CXX03_LANG 778# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 779# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 780 __lx __v_; \ 781 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 782 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 783 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 784 }; 785#else // _LIBCPP_CXX03_LANG 786# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 787# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 788#endif // _LIBCPP_CXX03_LANG 789 790// _LIBCPP_DEBUG potential values: 791// - undefined: No assertions. This is the default. 792// - 0: Basic assertions 793// - 1: Basic assertions + iterator validity checks + unspecified behavior randomization. 794# if !defined(_LIBCPP_DEBUG) 795# define _LIBCPP_DEBUG_LEVEL 0 796# elif _LIBCPP_DEBUG == 0 797# define _LIBCPP_DEBUG_LEVEL 1 798# elif _LIBCPP_DEBUG == 1 799# define _LIBCPP_DEBUG_LEVEL 2 800# else 801# error Supported values for _LIBCPP_DEBUG are 0 and 1 802# endif 803 804# if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG) 805# define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY 806# endif 807 808# if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY) 809# if defined(_LIBCPP_CXX03_LANG) 810# error Support for unspecified stability is only for C++11 and higher 811# endif 812# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 813 do { \ 814 if (!__builtin_is_constant_evaluated()) \ 815 _VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \ 816 } while (false) 817# else 818# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 819 do { \ 820 } while (false) 821# endif 822 823// Libc++ allows disabling extern template instantiation declarations by 824// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. 825// 826// Furthermore, when the Debug mode is enabled, we disable extern declarations 827// when building user code because we don't want to use the functions compiled 828// in the library, which might not have had the debug mode enabled when built. 829// However, some extern declarations need to be used, because code correctness 830// depends on it (several instances in <locale>). Those special declarations 831// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled 832// even when the debug mode is enabled. 833#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) 834# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 835# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ 836#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) 837# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 838# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 839#else 840# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 841# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 842#endif 843 844#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 845 defined(__sun__) || defined(__NetBSD__) 846#define _LIBCPP_LOCALE__L_EXTENSIONS 1 847#endif 848 849#ifdef __FreeBSD__ 850#define _DECLARE_C99_LDBL_MATH 1 851#endif 852 853// If we are getting operator new from the MSVC CRT, then allocation overloads 854// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 855#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 856# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 857#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 858 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 859 // have it unless the language feature test macro is defined. 860# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 861#elif defined(__MVS__) 862# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 863#endif 864 865#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 866 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 867# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 868#endif 869 870#if defined(__APPLE__) || defined(__FreeBSD__) 871#define _LIBCPP_HAS_DEFAULTRUNELOCALE 872#endif 873 874#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 875#define _LIBCPP_WCTYPE_IS_MASK 876#endif 877 878#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 879#define _LIBCPP_HAS_NO_CHAR8_T 880#endif 881 882// Deprecation macros. 883// 884// Deprecations warnings are always enabled, except when users explicitly opt-out 885// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 886#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 887# if __has_attribute(deprecated) 888# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 889# elif _LIBCPP_STD_VER > 11 890# define _LIBCPP_DEPRECATED [[deprecated]] 891# else 892# define _LIBCPP_DEPRECATED 893# endif 894#else 895# define _LIBCPP_DEPRECATED 896#endif 897 898#if !defined(_LIBCPP_CXX03_LANG) 899# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 900#else 901# define _LIBCPP_DEPRECATED_IN_CXX11 902#endif 903 904#if _LIBCPP_STD_VER > 11 905# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 906#else 907# define _LIBCPP_DEPRECATED_IN_CXX14 908#endif 909 910#if _LIBCPP_STD_VER > 14 911# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 912#else 913# define _LIBCPP_DEPRECATED_IN_CXX17 914#endif 915 916#if _LIBCPP_STD_VER > 17 917# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 918#else 919# define _LIBCPP_DEPRECATED_IN_CXX20 920#endif 921 922#if !defined(_LIBCPP_HAS_NO_CHAR8_T) 923# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 924#else 925# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 926#endif 927 928// Macros to enter and leave a state where deprecation warnings are suppressed. 929#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 930# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 931 _Pragma("GCC diagnostic push") \ 932 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 933 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 934# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 935 _Pragma("GCC diagnostic pop") 936#else 937# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 938# define _LIBCPP_SUPPRESS_DEPRECATED_POP 939#endif 940 941#if _LIBCPP_STD_VER <= 11 942# define _LIBCPP_EXPLICIT_AFTER_CXX11 943#else 944# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 945#endif 946 947#if _LIBCPP_STD_VER > 11 948# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 949#else 950# define _LIBCPP_CONSTEXPR_AFTER_CXX11 951#endif 952 953#if _LIBCPP_STD_VER > 14 954# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 955#else 956# define _LIBCPP_CONSTEXPR_AFTER_CXX14 957#endif 958 959#if _LIBCPP_STD_VER > 17 960# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 961#else 962# define _LIBCPP_CONSTEXPR_AFTER_CXX17 963#endif 964 965#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 966# define _LIBCPP_NODISCARD [[nodiscard]] 967#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 968# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 969#else 970// We can't use GCC's [[gnu::warn_unused_result]] and 971// __attribute__((warn_unused_result)), because GCC does not silence them via 972// (void) cast. 973# define _LIBCPP_NODISCARD 974#endif 975 976// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 977// specified as such as an extension. 978#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 979# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 980#else 981# define _LIBCPP_NODISCARD_EXT 982#endif 983 984#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 985 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 986# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 987#else 988# define _LIBCPP_NODISCARD_AFTER_CXX17 989#endif 990 991#if __has_attribute(no_destroy) 992# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 993#else 994# define _LIBCPP_NO_DESTROY 995#endif 996 997#ifndef _LIBCPP_HAS_NO_ASAN 998extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( 999 const void *, const void *, const void *, const void *); 1000#endif 1001 1002// Try to find out if RTTI is disabled. 1003#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 1004# define _LIBCPP_NO_RTTI 1005#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1006# define _LIBCPP_NO_RTTI 1007#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1008# define _LIBCPP_NO_RTTI 1009#endif 1010 1011#ifndef _LIBCPP_WEAK 1012#define _LIBCPP_WEAK __attribute__((__weak__)) 1013#endif 1014 1015// Thread API 1016#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1017 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1018 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1019 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1020# if defined(__FreeBSD__) || \ 1021 defined(__wasi__) || \ 1022 defined(__NetBSD__) || \ 1023 defined(__OpenBSD__) || \ 1024 defined(__NuttX__) || \ 1025 defined(__linux__) || \ 1026 defined(__GNU__) || \ 1027 defined(__APPLE__) || \ 1028 defined(__sun__) || \ 1029 defined(__MVS__) || \ 1030 defined(_AIX) 1031# define _LIBCPP_HAS_THREAD_API_PTHREAD 1032# elif defined(__Fuchsia__) 1033 // TODO(44575): Switch to C11 thread API when possible. 1034# define _LIBCPP_HAS_THREAD_API_PTHREAD 1035# elif defined(_LIBCPP_WIN32API) 1036# define _LIBCPP_HAS_THREAD_API_WIN32 1037# else 1038# error "No thread API" 1039# endif // _LIBCPP_HAS_THREAD_API 1040#endif // _LIBCPP_HAS_NO_THREADS 1041 1042#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1043#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1044#define _LIBCPP_HAS_COND_CLOCKWAIT 1045#elif defined(_LIBCPP_GLIBC_PREREQ) 1046#if _LIBCPP_GLIBC_PREREQ(2, 30) 1047#define _LIBCPP_HAS_COND_CLOCKWAIT 1048#endif 1049#endif 1050#endif 1051 1052#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1053#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1054 _LIBCPP_HAS_NO_THREADS is not defined. 1055#endif 1056 1057#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1058#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1059 _LIBCPP_HAS_NO_THREADS is defined. 1060#endif 1061 1062#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1063#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1064 _LIBCPP_HAS_NO_THREADS is defined. 1065#endif 1066 1067#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1068#define __STDCPP_THREADS__ 1 1069#endif 1070 1071// The glibc and Bionic implementation of pthreads implements 1072// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1073// mutexes have no destroy mechanism. 1074// 1075// This optimization can't be performed on Apple platforms, where 1076// pthread_mutex_destroy can allow the kernel to release resources. 1077// See https://llvm.org/D64298 for details. 1078// 1079// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1080// respective stakeholders. 1081#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1082 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1083 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1084# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1085#endif 1086 1087// Destroying a condvar is a nop on Windows. 1088// 1089// This optimization can't be performed on Apple platforms, where 1090// pthread_cond_destroy can allow the kernel to release resources. 1091// See https://llvm.org/D64298 for details. 1092// 1093// TODO(EricWF): This is potentially true for some pthread implementations 1094// as well. 1095#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1096 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1097# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1098#endif 1099 1100// Some systems do not provide gets() in their C library, for security reasons. 1101#if defined(_LIBCPP_MSVCRT) || \ 1102 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ 1103 defined(__OpenBSD__) 1104# define _LIBCPP_C_HAS_NO_GETS 1105#endif 1106 1107#if defined(__BIONIC__) || defined(__NuttX__) || \ 1108 defined(__Fuchsia__) || defined(__wasi__) || \ 1109 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1110#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1111#endif 1112 1113#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1114# define _LIBCPP_HAS_C_ATOMIC_IMP 1115#elif defined(_LIBCPP_COMPILER_GCC) 1116# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1117#endif 1118 1119#if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1120 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1121 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1122# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1123#else 1124# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1125# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1126# endif 1127# ifdef _LIBCPP_FREESTANDING 1128# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1129# endif 1130#endif 1131 1132#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1133#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1134#endif 1135 1136#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1137# if defined(__clang__) && __has_attribute(acquire_capability) 1138// Work around the attribute handling in clang. When both __declspec and 1139// __attribute__ are present, the processing goes awry preventing the definition 1140// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1141// combining the two does work. 1142# if !defined(_MSC_VER) 1143# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1144# endif 1145# endif 1146#endif 1147 1148#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1149# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1150#else 1151# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1152#endif 1153 1154#if _LIBCPP_STD_VER > 17 1155# define _LIBCPP_CONSTINIT constinit 1156#elif __has_attribute(require_constant_initialization) 1157# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1158#else 1159# define _LIBCPP_CONSTINIT 1160#endif 1161 1162#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1163# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1164 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1165# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1166 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1167#else 1168# define _LIBCPP_DIAGNOSE_WARNING(...) 1169# define _LIBCPP_DIAGNOSE_ERROR(...) 1170#endif 1171 1172// Use a function like macro to imply that it must be followed by a semicolon 1173#if _LIBCPP_STD_VER > 14 && __has_cpp_attribute(fallthrough) 1174# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1175#elif __has_cpp_attribute(clang::fallthrough) 1176# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1177#elif __has_attribute(__fallthrough__) 1178# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1179#else 1180# define _LIBCPP_FALLTHROUGH() ((void)0) 1181#endif 1182 1183#if __has_attribute(__nodebug__) 1184#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1185#else 1186#define _LIBCPP_NODEBUG 1187#endif 1188 1189#if __has_attribute(__standalone_debug__) 1190#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1191#else 1192#define _LIBCPP_STANDALONE_DEBUG 1193#endif 1194 1195#if __has_attribute(__preferred_name__) 1196#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1197#else 1198#define _LIBCPP_PREFERRED_NAME(x) 1199#endif 1200 1201// We often repeat things just for handling wide characters in the library. 1202// When wide characters are disabled, it can be useful to have a quick way of 1203// disabling it without having to resort to #if-#endif, which has a larger 1204// impact on readability. 1205#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1206# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1207#else 1208# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1209#endif 1210 1211#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1212 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1213# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1214#else 1215# define _LIBCPP_DECLSPEC_EMPTY_BASES 1216#endif 1217 1218#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1219#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1220#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1221#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1222#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1223#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1224 1225#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1226#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1227#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1228#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1229#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1230#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1231#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1232 1233#if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1234#define _LIBCPP_HAS_NO_CXX20_COROUTINES 1235#endif 1236 1237#if defined(_LIBCPP_COMPILER_IBM) 1238#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1239#endif 1240 1241#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1242# define _LIBCPP_PUSH_MACROS 1243# define _LIBCPP_POP_MACROS 1244#else 1245 // Don't warn about macro conflicts when we can restore them at the 1246 // end of the header. 1247# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1248# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1249# endif 1250# if defined(_LIBCPP_COMPILER_MSVC) 1251# define _LIBCPP_PUSH_MACROS \ 1252 __pragma(push_macro("min")) \ 1253 __pragma(push_macro("max")) 1254# define _LIBCPP_POP_MACROS \ 1255 __pragma(pop_macro("min")) \ 1256 __pragma(pop_macro("max")) 1257# else 1258# define _LIBCPP_PUSH_MACROS \ 1259 _Pragma("push_macro(\"min\")") \ 1260 _Pragma("push_macro(\"max\")") 1261# define _LIBCPP_POP_MACROS \ 1262 _Pragma("pop_macro(\"min\")") \ 1263 _Pragma("pop_macro(\"max\")") 1264# endif 1265#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1266 1267#ifndef _LIBCPP_NO_AUTO_LINK 1268# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1269# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1270# pragma comment(lib, "c++.lib") 1271# else 1272# pragma comment(lib, "libc++.lib") 1273# endif 1274# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1275#endif // _LIBCPP_NO_AUTO_LINK 1276 1277// Configures the fopen close-on-exec mode character, if any. This string will 1278// be appended to any mode string used by fstream for fopen/fdopen. 1279// 1280// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1281// do. 1282#if defined(__BIONIC__) 1283# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1284#else 1285# define _LIBCPP_FOPEN_CLOEXEC_MODE 1286#endif 1287 1288// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1289// of functions used in cstdio may not be available for low API levels when 1290// using 64-bit file offsets on LP32. 1291#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1292#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1293#endif 1294 1295#if __has_attribute(init_priority) 1296 // TODO: Remove this once we drop support for building libc++ with old Clangs 1297# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1298 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1299# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1300# else 1301# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1302# endif 1303#else 1304# define _LIBCPP_INIT_PRIORITY_MAX 1305#endif 1306 1307#if defined(__GNUC__) || defined(__clang__) 1308 // The attribute uses 1-based indices for ordinary and static member functions. 1309 // The attribute uses 2-based indices for non-static member functions. 1310# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1311 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1312#else 1313# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1314#endif 1315 1316#if __has_cpp_attribute(msvc::no_unique_address) 1317 // MSVC implements [[no_unique_address]] as a silent no-op currently. 1318 // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1319 // However, MSVC implements [[msvc::no_unique_address]] which does what 1320 // [[no_unique_address]] is supposed to do, in general. 1321 1322 // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1323 // [[msvc::no_unique_address]] though. If/when it does implement 1324 // [[msvc::no_unique_address]], this should be preferred though. 1325# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1326#elif __has_cpp_attribute(no_unique_address) 1327# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] 1328#else 1329# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1330 // Note that this can be replaced by #error as soon as clang-cl 1331 // implements msvc::no_unique_address, since there should be no C++20 1332 // compiler that doesn't support one of the two attributes at that point. 1333 // We generally don't want to use this macro outside of C++20-only code, 1334 // because using it conditionally in one language version only would make 1335 // the ABI inconsistent. 1336#endif 1337 1338#ifdef _LIBCPP_COMPILER_CLANG_BASED 1339# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 1340# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 1341# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 1342# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1343#elif defined(_LIBCPP_COMPILER_GCC) 1344# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 1345# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 1346# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1347# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 1348#else 1349# define _LIBCPP_DIAGNOSTIC_PUSH 1350# define _LIBCPP_DIAGNOSTIC_POP 1351# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 1352# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 1353#endif 1354 1355#if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC) 1356# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)") 1357# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)") 1358#else 1359# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */ 1360# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */ 1361#endif 1362 1363#endif // __cplusplus 1364 1365#endif // _LIBCPP___CONFIG 1366