-
Notifications
You must be signed in to change notification settings - Fork 12.2k
/
__config
1271 lines (1103 loc) · 50.1 KB
/
__config
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___CONFIG
#define _LIBCPP___CONFIG
#include <__config_site>
#if defined(_MSC_VER) && !defined(__clang__)
# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# endif
#endif
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# pragma GCC system_header
#endif
#if defined(__apple_build_version__)
// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403)
# define _LIBCPP_COMPILER_CLANG_BASED
# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000)
#elif defined(__clang__)
# define _LIBCPP_COMPILER_CLANG_BASED
# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
#elif defined(__GNUC__)
# define _LIBCPP_COMPILER_GCC
#endif
#ifdef __cplusplus
// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 16.0.1 == 16.00.01), _LIBCPP_VERSION is
// defined to XXYYZZ.
# define _LIBCPP_VERSION 160006
# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
// Valid C++ identifier that revs with every libc++ version. This can be used to
// generate identifiers that must be unique for every released libc++ version.
# define _LIBCPP_VERSIONED_IDENTIFIER _LIBCPP_CONCAT(v, _LIBCPP_VERSION)
# if __STDC_HOSTED__ == 0
# define _LIBCPP_FREESTANDING
# endif
# ifndef _LIBCPP_STD_VER
# if __cplusplus <= 201103L
# define _LIBCPP_STD_VER 11
# elif __cplusplus <= 201402L
# define _LIBCPP_STD_VER 14
# elif __cplusplus <= 201703L
# define _LIBCPP_STD_VER 17
# elif __cplusplus <= 202002L
# define _LIBCPP_STD_VER 20
# else
// Expected release year of the next C++ standard
# define _LIBCPP_STD_VER 23
# endif
# endif // _LIBCPP_STD_VER
# if defined(__ELF__)
# define _LIBCPP_OBJECT_FORMAT_ELF 1
# elif defined(__MACH__)
# define _LIBCPP_OBJECT_FORMAT_MACHO 1
# elif defined(_WIN32)
# define _LIBCPP_OBJECT_FORMAT_COFF 1
# elif defined(__wasm__)
# define _LIBCPP_OBJECT_FORMAT_WASM 1
# elif defined(_AIX)
# define _LIBCPP_OBJECT_FORMAT_XCOFF 1
# else
// ... add new file formats here ...
# endif
# if _LIBCPP_ABI_VERSION >= 2
// Change short string representation so that string data starts at offset 0,
// improving its alignment in some cases.
# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
// Fix deque iterator type in order to support incomplete types.
# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
// Fix undefined behavior in how std::list stores its linked nodes.
# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
// Fix undefined behavior in how __tree stores its end and parent nodes.
# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
// Fix undefined behavior in how __hash_table stores its pointer types.
# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
// Define a key function for `bad_function_call` in the library, to centralize
// its vtable and typeinfo to libc++ rather than having all other libraries
// using that class define their own copies.
# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
// Override the default return value of exception::what() for
// bad_function_call::what() with a string that is specific to
// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break
// because it changes the vtable layout of bad_function_call.
# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE
// Enable optimized version of __do_get_(un)signed which avoids redundant copies.
# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
// Give reverse_iterator<T> one data member of type T, not two.
// Also, in C++17 and later, don't derive iterator types from std::iterator.
# define _LIBCPP_ABI_NO_ITERATOR_BASES
// Use the smallest possible integer type to represent the index of the variant.
// Previously libc++ used "unsigned int" exclusively.
# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
// Unstable attempt to provide a more optimized std::function
# define _LIBCPP_ABI_OPTIMIZED_FUNCTION
// All the regex constants must be distinct and nonzero.
# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
// Re-worked external template instantiations for std::string with a focus on
// performance and fast-path inlining.
# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION
// Enable clang::trivial_abi on std::unique_ptr.
# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI
// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr
# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI
// std::random_device holds some state when it uses an implementation that gets
// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this
// implementation to another one on a platform that has already shipped
// std::random_device, one needs to retain the same object layout to remain ABI
// compatible. This switch removes these workarounds for platforms that don't care
// about ABI compatibility.
# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT
// Don't export the legacy __basic_string_common class and its methods from the built library.
# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON
// Don't export the legacy __vector_base_common class and its methods from the built library.
# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON
// According to the Standard, `bitset::operator[] const` returns bool
# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL
// Fix the implementation of CityHash used for std::hash<fundamental-type>.
// This is an ABI break because `std::hash` will return a different result,
// which means that hashing the same object in translation units built against
// different versions of libc++ can return inconsistent results. This is especially
// tricky since std::hash is used in the implementation of unordered containers.
//
// The incorrect implementation of CityHash has the problem that it drops some
// bits on the floor.
# define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION
// Remove the base 10 implementation of std::to_chars from the dylib.
// The implementation moved to the header, but we still export the symbols from
// the dylib for backwards compatibility.
# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
# elif _LIBCPP_ABI_VERSION == 1
# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF))
// Enable compiling copies of now inline methods into the dylib to support
// applications compiled against older libraries. This is unnecessary with
// COFF dllexport semantics, since dllexport forces a non-inline definition
// of inline functions to be emitted anyway. Our own non-inline copy would
// conflict with the dllexport-emitted copy, so we disable it. For XCOFF,
// the linker will take issue with the symbols in the shared object if the
// weak inline methods get visibility (such as from -fvisibility-inlines-hidden),
// so disable it.
# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
# endif
// Feature macros for disabling pre ABI v1 features. All of these options
// are deprecated.
# if defined(__FreeBSD__)
# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
# endif
# endif
# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2
// Enable additional explicit instantiations of iostreams components. This
// reduces the number of weak definitions generated in programs that use
// iostreams by providing a single strong definition in the shared library.
# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
// Define a key function for `bad_function_call` in the library, to centralize
// its vtable and typeinfo to libc++ rather than having all other libraries
// using that class define their own copies.
# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
# endif
# define _LIBCPP_TOSTRING2(x) #x
# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
# if __cplusplus < 201103L
# define _LIBCPP_CXX03_LANG
# endif
# ifndef __has_attribute
# define __has_attribute(__x) 0
# endif
# ifndef __has_builtin
# define __has_builtin(__x) 0
# endif
# ifndef __has_extension
# define __has_extension(__x) 0
# endif
# ifndef __has_feature
# define __has_feature(__x) 0
# endif
# ifndef __has_cpp_attribute
# define __has_cpp_attribute(__x) 0
# endif
# ifndef __has_constexpr_builtin
# define __has_constexpr_builtin(x) 0
# endif
// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
// the compiler and '1' otherwise.
# ifndef __is_identifier
# define __is_identifier(__x) 1
# endif
# ifndef __has_declspec_attribute
# define __has_declspec_attribute(__x) 0
# endif
# define __has_keyword(__x) !(__is_identifier(__x))
# ifndef __has_include
# define __has_include(...) 0
# endif
# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L
# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"
# endif
// FIXME: ABI detection should be done via compiler builtin macros. This
// is just a placeholder until Clang implements such macros. For now assume
// that Windows compilers pretending to be MSVC++ target the Microsoft ABI,
// and allow the user to explicitly specify the ABI to handle cases where this
// heuristic falls short.
# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
# elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
# define _LIBCPP_ABI_ITANIUM
# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
# define _LIBCPP_ABI_MICROSOFT
# else
# if defined(_WIN32) && defined(_MSC_VER)
# define _LIBCPP_ABI_MICROSOFT
# else
# define _LIBCPP_ABI_ITANIUM
# endif
# endif
# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
# define _LIBCPP_ABI_VCRUNTIME
# endif
# if __has_feature(experimental_library)
# ifndef _LIBCPP_ENABLE_EXPERIMENTAL
# define _LIBCPP_ENABLE_EXPERIMENTAL
# endif
# endif
// Incomplete features get their own specific disabling flags. This makes it
// easier to grep for target specific flags once the feature is complete.
# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY)
# define _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
# endif
// Need to detect which libc we're using if we're on Linux.
# if defined(__linux__)
# include <features.h>
# if defined(__GLIBC_PREREQ)
# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
# else
# define _LIBCPP_GLIBC_PREREQ(a, b) 0
# endif // defined(__GLIBC_PREREQ)
# endif // defined(__linux__)
# if defined(__MVS__)
# include <features.h> // for __NATIVE_ASCII_F
# endif
# ifdef __LITTLE_ENDIAN__
# if __LITTLE_ENDIAN__
# define _LIBCPP_LITTLE_ENDIAN
# endif // __LITTLE_ENDIAN__
# endif // __LITTLE_ENDIAN__
# ifdef __BIG_ENDIAN__
# if __BIG_ENDIAN__
# define _LIBCPP_BIG_ENDIAN
# endif // __BIG_ENDIAN__
# endif // __BIG_ENDIAN__
# ifdef __BYTE_ORDER__
# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define _LIBCPP_LITTLE_ENDIAN
# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define _LIBCPP_BIG_ENDIAN
# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# endif // __BYTE_ORDER__
# ifdef __FreeBSD__
# include <sys/endian.h>
# include <osreldate.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN
# else // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_BIG_ENDIAN
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# endif // __FreeBSD__
# if defined(__NetBSD__) || defined(__OpenBSD__)
# include <sys/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN
# else // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_BIG_ENDIAN
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# endif // defined(__NetBSD__) || defined(__OpenBSD__)
# if defined(_WIN32)
# define _LIBCPP_WIN32API
# define _LIBCPP_LITTLE_ENDIAN
# define _LIBCPP_SHORT_WCHAR 1
// Both MinGW and native MSVC provide a "MSVC"-like environment
# define _LIBCPP_MSVCRT_LIKE
// If mingw not explicitly detected, assume using MS C runtime only if
// a MS compatibility version is specified.
# if defined(_MSC_VER) && !defined(__MINGW32__)
# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
# endif
# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
# define _LIBCPP_HAS_BITSCAN64
# endif
# define _LIBCPP_HAS_OPEN_WITH_WCHAR
# endif // defined(_WIN32)
# ifdef __sun__
# include <sys/isa_defs.h>
# ifdef _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN
# else
# define _LIBCPP_BIG_ENDIAN
# endif
# endif // __sun__
# if defined(_AIX) && !defined(__64BIT__)
// The size of wchar is 2 byte on 32-bit mode on AIX.
# define _LIBCPP_SHORT_WCHAR 1
# endif
// Libc++ supports various implementations of std::random_device.
//
// _LIBCPP_USING_DEV_RANDOM
// Read entropy from the given file, by default `/dev/urandom`.
// If a token is provided, it is assumed to be the path to a file
// to read entropy from. This is the default behavior if nothing
// else is specified. This implementation requires storing state
// inside `std::random_device`.
//
// _LIBCPP_USING_ARC4_RANDOM
// Use arc4random(). This allows obtaining random data even when
// using sandboxing mechanisms. On some platforms like Apple, this
// is the recommended source of entropy for user-space programs.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_GETENTROPY
// Use getentropy().
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_FUCHSIA_CPRNG
// Use Fuchsia's zx_cprng_draw() system call, which is specified to
// deliver high-quality entropy and cannot fail.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_NACL_RANDOM
// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
// including accesses to the special files under `/dev`. This implementation
// uses the NaCL syscall `nacl_secure_random_init()` to get entropy.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
//
// _LIBCPP_USING_WIN32_RANDOM
// Use rand_s(), for use on Windows.
// When this option is used, the token passed to `std::random_device`'s
// constructor *must* be "/dev/urandom" -- anything else is an error.
# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
defined(__DragonFly__) || defined(__sun__)
# define _LIBCPP_USING_ARC4_RANDOM
# elif defined(__wasi__) || defined(__EMSCRIPTEN__)
# define _LIBCPP_USING_GETENTROPY
# elif defined(__Fuchsia__)
# define _LIBCPP_USING_FUCHSIA_CPRNG
# elif defined(__native_client__)
# define _LIBCPP_USING_NACL_RANDOM
# elif defined(_LIBCPP_WIN32API)
# define _LIBCPP_USING_WIN32_RANDOM
# else
# define _LIBCPP_USING_DEV_RANDOM
# endif
# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
# include <endian.h>
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN
# elif __BYTE_ORDER == __BIG_ENDIAN
# define _LIBCPP_BIG_ENDIAN
# else // __BYTE_ORDER == __BIG_ENDIAN
# error unable to determine endian
# endif
# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
# else
# define _LIBCPP_NO_CFI
# endif
# ifndef _LIBCPP_CXX03_LANG
# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
# define _ALIGNAS_TYPE(x) alignas(x)
# define _ALIGNAS(x) alignas(x)
# define _LIBCPP_NORETURN [[noreturn]]
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(x) noexcept(x)
# define _LIBCPP_CONSTEXPR constexpr
# else
# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
# define _ALIGNAS(x) __attribute__((__aligned__(x)))
# define _LIBCPP_NORETURN __attribute__((__noreturn__))
# define _LIBCPP_HAS_NO_NOEXCEPT
# define nullptr __nullptr
# define _NOEXCEPT throw()
# define _NOEXCEPT_(x)
# define static_assert(...) _Static_assert(__VA_ARGS__)
# define decltype(...) __decltype(__VA_ARGS__)
# define _LIBCPP_CONSTEXPR
typedef __char16_t char16_t;
typedef __char32_t char32_t;
# endif
# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L
# define _LIBCPP_NO_EXCEPTIONS
# endif
# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
# if defined(_LIBCPP_COMPILER_CLANG_BASED)
# if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)
# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
# endif
// Objective-C++ features (opt-in)
# if __has_feature(objc_arc)
# define _LIBCPP_HAS_OBJC_ARC
# endif
# if __has_feature(objc_arc_weak)
# define _LIBCPP_HAS_OBJC_ARC_WEAK
# endif
# if __has_extension(blocks)
# define _LIBCPP_HAS_EXTENSION_BLOCKS
# endif
# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__)
# define _LIBCPP_HAS_BLOCKS_RUNTIME
# endif
# if !__has_feature(address_sanitizer)
# define _LIBCPP_HAS_NO_ASAN
# endif
// Allow for build-time disabling of unsigned integer sanitization
# if __has_attribute(no_sanitize)
# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
# endif
# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
# elif defined(_LIBCPP_COMPILER_GCC)
# if !defined(__SANITIZE_ADDRESS__)
# define _LIBCPP_HAS_NO_ASAN
# endif
# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
# endif // _LIBCPP_COMPILER_[CLANG|GCC]
# if defined(_LIBCPP_OBJECT_FORMAT_COFF)
# ifdef _DLL
# define _LIBCPP_CRT_FUNC __declspec(dllimport)
# else
# define _LIBCPP_CRT_FUNC
# endif
# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY))
# define _LIBCPP_DLL_VIS
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
# define _LIBCPP_OVERRIDABLE_FUNC_VIS
# define _LIBCPP_EXPORTED_FROM_ABI
# elif defined(_LIBCPP_BUILDING_LIBRARY)
# define _LIBCPP_DLL_VIS __declspec(dllexport)
# if defined(__MINGW32__)
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
# else
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
# endif
# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
# else
# define _LIBCPP_DLL_VIS __declspec(dllimport)
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
# define _LIBCPP_OVERRIDABLE_FUNC_VIS
# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
# endif
# define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
# define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
# define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
# define _LIBCPP_HIDDEN
# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
# define _LIBCPP_TEMPLATE_VIS
# define _LIBCPP_TEMPLATE_DATA_VIS
# define _LIBCPP_ENUM_VIS
# else
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis)))
# else
# define _LIBCPP_VISIBILITY(vis)
# endif
# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden")
# define _LIBCPP_FUNC_VIS _LIBCPP_VISIBILITY("default")
# define _LIBCPP_TYPE_VIS _LIBCPP_VISIBILITY("default")
# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default")
# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default")
# define _LIBCPP_EXCEPTION_ABI _LIBCPP_VISIBILITY("default")
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default")
# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
// TODO: Make this a proper customization point or remove the option to override it.
# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default")
# endif
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
// The inline should be removed once PR32114 is resolved
# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
# else
# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
# endif
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# if __has_attribute(__type_visibility__)
# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default")))
# else
# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default")))
# endif
# else
# define _LIBCPP_TEMPLATE_VIS
# endif
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default")))
# else
# define _LIBCPP_ENUM_VIS
# endif
# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
# if __has_attribute(exclude_from_explicit_instantiation)
# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__))
# else
// Try to approximate the effect of exclude_from_explicit_instantiation
// (which is that entities are not assumed to be provided by explicit
// template instantiations in the dylib) by always inlining those entities.
# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
# endif
// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved
// on two levels:
// 1. The symbol is given hidden visibility, which ensures that users won't start exporting
// symbols from their dynamic library by means of using the libc++ headers. This ensures
// that those symbols stay private to the dynamic library in which it is defined.
//
// 2. The symbol is given an ABI tag that changes with each version of libc++. This ensures
// that no ODR violation can arise from mixing two TUs compiled with different versions
// of libc++ where we would have changed the definition of a symbol. If the symbols shared
// the same name, the ODR would require that their definitions be token-by-token equivalent,
// which basically prevents us from being able to make any change to any function in our
// headers. Using this ABI tag ensures that the symbol name is "bumped" artificially at
// each release, which lets us change the definition of these symbols at our leisure.
// Note that historically, this has been achieved in various ways, including force-inlining
// all functions or giving internal linkage to all functions. Both these (previous) solutions
// suffer from drawbacks that lead notably to code bloat.
//
// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend
// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library.
//
// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions
// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled
// name of a virtual function is part of its ABI, since some architectures like arm64e can sign
// the virtual function pointer in the vtable based on the mangled name of the function. Since
// we use an ABI tag that changes with each released version, the mangled name of the virtual
// function would change, which is incorrect. Note that it doesn't make much sense to change
// the implementation of a virtual function in an ABI-incompatible way in the first place,
// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable.
//
// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing
// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and
// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70.
# ifndef _LIBCPP_NO_ABI_TAG
# define _LIBCPP_HIDE_FROM_ABI \
_LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \
__attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER))))
# else
# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# endif
# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern
// "C" function, as those lack mangling.
# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# ifdef _LIBCPP_BUILDING_LIBRARY
# if _LIBCPP_ABI_VERSION > 1
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
# else
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
# endif
# else
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
# endif
// Just so we can migrate to the new macros gradually.
# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
// clang-format off
# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
# define _LIBCPP_END_NAMESPACE_STD }}
# define _VSTD std
_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
# if _LIBCPP_STD_VER > 14
# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
_LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
# else
# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
_LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
# endif
# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }}
// clang-format on
# define _VSTD_FS std::__fs::filesystem
# if __has_attribute(__enable_if__)
# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, "")))
# endif
# ifndef __SIZEOF_INT128__
# define _LIBCPP_HAS_NO_INT128
# endif
# ifndef __cpp_consteval
# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR
# else
# define _LIBCPP_CONSTEVAL consteval
# endif
# if __has_attribute(__malloc__)
# define _LIBCPP_NOALIAS __attribute__((__malloc__))
# else
# define _LIBCPP_NOALIAS
# endif
# if __has_attribute(__using_if_exists__)
# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__))
# else
# define _LIBCPP_USING_IF_EXISTS
# endif
# ifdef _LIBCPP_CXX03_LANG
# define _LIBCPP_DECLARE_STRONG_ENUM(x) \
struct _LIBCPP_TYPE_VIS x { \
enum __lx
// clang-format off
# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
__lx __v_; \
_LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
_LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
_LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \
};
// clang-format on
# else // _LIBCPP_CXX03_LANG
# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
# endif // _LIBCPP_CXX03_LANG
# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \
defined(__NetBSD__)
# define _LIBCPP_LOCALE__L_EXTENSIONS 1
# endif
# ifdef __FreeBSD__
# define _DECLARE_C99_LDBL_MATH 1
# endif
// If we are getting operator new from the MSVC CRT, then allocation overloads
// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
// We're deferring to Microsoft's STL to provide aligned new et al. We don't
// have it unless the language feature test macro is defined.
# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
# elif defined(__MVS__)
# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
# endif
# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
# endif
// It is not yet possible to use aligned_alloc() on all Apple platforms since
// 10.15 was the first version to ship an implementation of aligned_alloc().
# if defined(__APPLE__)
# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500)
# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
# endif
# elif defined(__ANDROID__) && __ANDROID_API__ < 28
// Android only provides aligned_alloc when targeting API 28 or higher.
# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
# endif
# if defined(__APPLE__) || defined(__FreeBSD__)
# define _LIBCPP_HAS_DEFAULTRUNELOCALE
# endif
# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
# define _LIBCPP_WCTYPE_IS_MASK
# endif
# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
# define _LIBCPP_HAS_NO_CHAR8_T
# endif
// Deprecation macros.
//
// Deprecations warnings are always enabled, except when users explicitly opt-out
// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
# if __has_attribute(deprecated)
# define _LIBCPP_DEPRECATED __attribute__((deprecated))
# define _LIBCPP_DEPRECATED_(m) __attribute__((deprecated(m)))
# elif _LIBCPP_STD_VER > 11
# define _LIBCPP_DEPRECATED [[deprecated]]
# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]
# else
# define _LIBCPP_DEPRECATED
# define _LIBCPP_DEPRECATED_(m)
# endif
# else
# define _LIBCPP_DEPRECATED
# define _LIBCPP_DEPRECATED_(m)
# endif
# if !defined(_LIBCPP_CXX03_LANG)
# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
# else
# define _LIBCPP_DEPRECATED_IN_CXX11
# endif
# if _LIBCPP_STD_VER > 11
# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
# else
# define _LIBCPP_DEPRECATED_IN_CXX14
# endif
# if _LIBCPP_STD_VER > 14
# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
# else
# define _LIBCPP_DEPRECATED_IN_CXX17
# endif
# if _LIBCPP_STD_VER > 17
# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
# else
# define _LIBCPP_DEPRECATED_IN_CXX20
# endif
#if _LIBCPP_STD_VER >= 23
# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED
#else
# define _LIBCPP_DEPRECATED_IN_CXX23
#endif
# if !defined(_LIBCPP_HAS_NO_CHAR8_T)
# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
# else
# define _LIBCPP_DEPRECATED_WITH_CHAR8_T
# endif
// Macros to enter and leave a state where deprecation warnings are suppressed.
# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC)
# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
_Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \
_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop")
# else
# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
# define _LIBCPP_SUPPRESS_DEPRECATED_POP
# endif
# if _LIBCPP_STD_VER <= 11
# define _LIBCPP_EXPLICIT_AFTER_CXX11
# else
# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
# endif
# if _LIBCPP_STD_VER > 11
# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr
# else
# define _LIBCPP_CONSTEXPR_SINCE_CXX14
# endif
# if _LIBCPP_STD_VER > 14
# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr
# else
# define _LIBCPP_CONSTEXPR_SINCE_CXX17
# endif
# if _LIBCPP_STD_VER > 17
# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr
# else
# define _LIBCPP_CONSTEXPR_SINCE_CXX20
# endif
# if _LIBCPP_STD_VER > 20
# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr
# else
# define _LIBCPP_CONSTEXPR_SINCE_CXX23
# endif
# if __has_cpp_attribute(nodiscard)
# define _LIBCPP_NODISCARD [[nodiscard]]
# else
// We can't use GCC's [[gnu::warn_unused_result]] and
// __attribute__((warn_unused_result)), because GCC does not silence them via
// (void) cast.
# define _LIBCPP_NODISCARD
# endif
// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not
// specified as such as an extension.
# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD
# else
# define _LIBCPP_NODISCARD_EXT
# endif
# if _LIBCPP_STD_VER > 17 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD
# else
# define _LIBCPP_NODISCARD_AFTER_CXX17
# endif
# if __has_attribute(__no_destroy__)
# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
# else
# define _LIBCPP_NO_DESTROY
# endif
# ifndef _LIBCPP_HAS_NO_ASAN
extern "C" _LIBCPP_FUNC_VIS void
__sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*);
# endif
// Try to find out if RTTI is disabled.
# if !defined(__cpp_rtti) || __cpp_rtti < 199711L
# define _LIBCPP_HAS_NO_RTTI
# endif
# ifndef _LIBCPP_WEAK
# define _LIBCPP_WEAK __attribute__((__weak__))
# endif
// Thread API
// clang-format off
# if !defined(_LIBCPP_HAS_NO_THREADS) && \
!defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
!defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
!defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
# if defined(__FreeBSD__) || \
defined(__wasi__) || \
defined(__NetBSD__) || \
defined(__OpenBSD__) || \
defined(__NuttX__) || \
defined(__linux__) || \
defined(__GNU__) || \
defined(__APPLE__) || \
defined(__sun__) || \
defined(__MVS__) || \
defined(_AIX) || \
defined(__EMSCRIPTEN__)
// clang-format on
# define _LIBCPP_HAS_THREAD_API_PTHREAD
# elif defined(__Fuchsia__)
// TODO(44575): Switch to C11 thread API when possible.
# define _LIBCPP_HAS_THREAD_API_PTHREAD
# elif defined(_LIBCPP_WIN32API)
# define _LIBCPP_HAS_THREAD_API_WIN32
# else
# error "No thread API"
# endif // _LIBCPP_HAS_THREAD_API
# endif // _LIBCPP_HAS_NO_THREADS
# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
# if defined(__ANDROID__) && __ANDROID_API__ >= 30
# define _LIBCPP_HAS_COND_CLOCKWAIT
# elif defined(_LIBCPP_GLIBC_PREREQ)
# if _LIBCPP_GLIBC_PREREQ(2, 30)
# define _LIBCPP_HAS_COND_CLOCKWAIT
# endif
# endif
# endif
# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
_LIBCPP_HAS_NO_THREADS is not defined.
# endif
# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
_LIBCPP_HAS_NO_THREADS is defined.
# endif
# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
_LIBCPP_HAS_NO_THREADS is defined.
# endif
# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
# define __STDCPP_THREADS__ 1
# endif
// The glibc and Bionic implementation of pthreads implements
// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
// mutexes have no destroy mechanism.
//
// This optimization can't be performed on Apple platforms, where
// pthread_mutex_destroy can allow the kernel to release resources.
// See https://llvm.org/D64298 for details.
//
// TODO(EricWF): Enable this optimization on Bionic after speaking to their
// respective stakeholders.
// clang-format off
# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \
(defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \
defined(_LIBCPP_HAS_THREAD_API_WIN32)
// clang-format on
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
# endif
// Destroying a condvar is a nop on Windows.
//
// This optimization can't be performed on Apple platforms, where
// pthread_cond_destroy can allow the kernel to release resources.
// See https://llvm.org/D64298 for details.
//
// TODO(EricWF): This is potentially true for some pthread implementations
// as well.