1// -*- C++ -*- 2//===-------------------------- memory ------------------------------------===// 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_MEMORY 11#define _LIBCPP_MEMORY 12 13/* 14 memory synopsis 15 16namespace std 17{ 18 19struct allocator_arg_t { }; 20inline constexpr allocator_arg_t allocator_arg = allocator_arg_t(); 21 22template <class T, class Alloc> struct uses_allocator; 23 24template <class Ptr> 25struct pointer_traits 26{ 27 typedef Ptr pointer; 28 typedef <details> element_type; 29 typedef <details> difference_type; 30 31 template <class U> using rebind = <details>; 32 33 static pointer pointer_to(<details>); 34}; 35 36template <class T> 37struct pointer_traits<T*> 38{ 39 typedef T* pointer; 40 typedef T element_type; 41 typedef ptrdiff_t difference_type; 42 43 template <class U> using rebind = U*; 44 45 static pointer pointer_to(<details>) noexcept; // constexpr in C++20 46}; 47 48template <class T> constexpr T* to_address(T* p) noexcept; // C++20 49template <class Ptr> auto to_address(const Ptr& p) noexcept; // C++20 50 51template <class Alloc> 52struct allocator_traits 53{ 54 typedef Alloc allocator_type; 55 typedef typename allocator_type::value_type 56 value_type; 57 58 typedef Alloc::pointer | value_type* pointer; 59 typedef Alloc::const_pointer 60 | pointer_traits<pointer>::rebind<const value_type> 61 const_pointer; 62 typedef Alloc::void_pointer 63 | pointer_traits<pointer>::rebind<void> 64 void_pointer; 65 typedef Alloc::const_void_pointer 66 | pointer_traits<pointer>::rebind<const void> 67 const_void_pointer; 68 typedef Alloc::difference_type 69 | pointer_traits<pointer>::difference_type 70 difference_type; 71 typedef Alloc::size_type 72 | make_unsigned<difference_type>::type 73 size_type; 74 typedef Alloc::propagate_on_container_copy_assignment 75 | false_type propagate_on_container_copy_assignment; 76 typedef Alloc::propagate_on_container_move_assignment 77 | false_type propagate_on_container_move_assignment; 78 typedef Alloc::propagate_on_container_swap 79 | false_type propagate_on_container_swap; 80 typedef Alloc::is_always_equal 81 | is_empty is_always_equal; 82 83 template <class T> using rebind_alloc = Alloc::rebind<U>::other | Alloc<T, Args...>; 84 template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>; 85 86 static pointer allocate(allocator_type& a, size_type n); // [[nodiscard]] in C++20 87 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // [[nodiscard]] in C++20 88 89 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; 90 91 template <class T, class... Args> 92 static void construct(allocator_type& a, T* p, Args&&... args); 93 94 template <class T> 95 static void destroy(allocator_type& a, T* p); 96 97 static size_type max_size(const allocator_type& a); // noexcept in C++14 98 99 static allocator_type 100 select_on_container_copy_construction(const allocator_type& a); 101}; 102 103template <> 104class allocator<void> 105{ 106public: 107 typedef void* pointer; 108 typedef const void* const_pointer; 109 typedef void value_type; 110 111 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 112}; 113 114template <class T> 115class allocator 116{ 117public: 118 typedef size_t size_type; 119 typedef ptrdiff_t difference_type; 120 typedef T* pointer; 121 typedef const T* const_pointer; 122 typedef typename add_lvalue_reference<T>::type reference; 123 typedef typename add_lvalue_reference<const T>::type const_reference; 124 typedef T value_type; 125 126 template <class U> struct rebind {typedef allocator<U> other;}; 127 128 constexpr allocator() noexcept; // constexpr in C++20 129 constexpr allocator(const allocator&) noexcept; // constexpr in C++20 130 template <class U> 131 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 132 ~allocator(); 133 pointer address(reference x) const noexcept; 134 const_pointer address(const_reference x) const noexcept; 135 pointer allocate(size_type, allocator<void>::const_pointer hint = 0); 136 void deallocate(pointer p, size_type n) noexcept; 137 size_type max_size() const noexcept; 138 template<class U, class... Args> 139 void construct(U* p, Args&&... args); 140 template <class U> 141 void destroy(U* p); 142}; 143 144template <class T, class U> 145bool operator==(const allocator<T>&, const allocator<U>&) noexcept; 146 147template <class T, class U> 148bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; 149 150template <class OutputIterator, class T> 151class raw_storage_iterator 152 : public iterator<output_iterator_tag, 153 T, // purposefully not C++03 154 ptrdiff_t, // purposefully not C++03 155 T*, // purposefully not C++03 156 raw_storage_iterator&> // purposefully not C++03 157{ 158public: 159 explicit raw_storage_iterator(OutputIterator x); 160 raw_storage_iterator& operator*(); 161 raw_storage_iterator& operator=(const T& element); 162 raw_storage_iterator& operator++(); 163 raw_storage_iterator operator++(int); 164}; 165 166template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 167template <class T> void return_temporary_buffer(T* p) noexcept; 168 169template <class T> T* addressof(T& r) noexcept; 170template <class T> T* addressof(const T&& r) noexcept = delete; 171 172template <class InputIterator, class ForwardIterator> 173ForwardIterator 174uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 175 176template <class InputIterator, class Size, class ForwardIterator> 177ForwardIterator 178uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 179 180template <class ForwardIterator, class T> 181void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 182 183template <class ForwardIterator, class Size, class T> 184ForwardIterator 185uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 186 187template <class T> 188void destroy_at(T* location); 189 190template <class ForwardIterator> 191 void destroy(ForwardIterator first, ForwardIterator last); 192 193template <class ForwardIterator, class Size> 194 ForwardIterator destroy_n(ForwardIterator first, Size n); 195 196template <class InputIterator, class ForwardIterator> 197 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 198 199template <class InputIterator, class Size, class ForwardIterator> 200 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 201 202template <class ForwardIterator> 203 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 204 205template <class ForwardIterator, class Size> 206 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 207 208template <class ForwardIterator> 209 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 210 211template <class ForwardIterator, class Size> 212 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 213 214template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 215 216template<class X> 217class auto_ptr // deprecated in C++11, removed in C++17 218{ 219public: 220 typedef X element_type; 221 222 explicit auto_ptr(X* p =0) throw(); 223 auto_ptr(auto_ptr&) throw(); 224 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 225 auto_ptr& operator=(auto_ptr&) throw(); 226 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 227 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 228 ~auto_ptr() throw(); 229 230 typename add_lvalue_reference<X>::type operator*() const throw(); 231 X* operator->() const throw(); 232 X* get() const throw(); 233 X* release() throw(); 234 void reset(X* p =0) throw(); 235 236 auto_ptr(auto_ptr_ref<X>) throw(); 237 template<class Y> operator auto_ptr_ref<Y>() throw(); 238 template<class Y> operator auto_ptr<Y>() throw(); 239}; 240 241template <class T> 242struct default_delete 243{ 244 constexpr default_delete() noexcept = default; 245 template <class U> default_delete(const default_delete<U>&) noexcept; 246 247 void operator()(T*) const noexcept; 248}; 249 250template <class T> 251struct default_delete<T[]> 252{ 253 constexpr default_delete() noexcept = default; 254 void operator()(T*) const noexcept; 255 template <class U> void operator()(U*) const = delete; 256}; 257 258template <class T, class D = default_delete<T>> 259class unique_ptr 260{ 261public: 262 typedef see below pointer; 263 typedef T element_type; 264 typedef D deleter_type; 265 266 // constructors 267 constexpr unique_ptr() noexcept; 268 explicit unique_ptr(pointer p) noexcept; 269 unique_ptr(pointer p, see below d1) noexcept; 270 unique_ptr(pointer p, see below d2) noexcept; 271 unique_ptr(unique_ptr&& u) noexcept; 272 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 273 template <class U, class E> 274 unique_ptr(unique_ptr<U, E>&& u) noexcept; 275 template <class U> 276 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 277 278 // destructor 279 ~unique_ptr(); 280 281 // assignment 282 unique_ptr& operator=(unique_ptr&& u) noexcept; 283 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 284 unique_ptr& operator=(nullptr_t) noexcept; 285 286 // observers 287 typename add_lvalue_reference<T>::type operator*() const; 288 pointer operator->() const noexcept; 289 pointer get() const noexcept; 290 deleter_type& get_deleter() noexcept; 291 const deleter_type& get_deleter() const noexcept; 292 explicit operator bool() const noexcept; 293 294 // modifiers 295 pointer release() noexcept; 296 void reset(pointer p = pointer()) noexcept; 297 void swap(unique_ptr& u) noexcept; 298}; 299 300template <class T, class D> 301class unique_ptr<T[], D> 302{ 303public: 304 typedef implementation-defined pointer; 305 typedef T element_type; 306 typedef D deleter_type; 307 308 // constructors 309 constexpr unique_ptr() noexcept; 310 explicit unique_ptr(pointer p) noexcept; 311 unique_ptr(pointer p, see below d) noexcept; 312 unique_ptr(pointer p, see below d) noexcept; 313 unique_ptr(unique_ptr&& u) noexcept; 314 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 315 316 // destructor 317 ~unique_ptr(); 318 319 // assignment 320 unique_ptr& operator=(unique_ptr&& u) noexcept; 321 unique_ptr& operator=(nullptr_t) noexcept; 322 323 // observers 324 T& operator[](size_t i) const; 325 pointer get() const noexcept; 326 deleter_type& get_deleter() noexcept; 327 const deleter_type& get_deleter() const noexcept; 328 explicit operator bool() const noexcept; 329 330 // modifiers 331 pointer release() noexcept; 332 void reset(pointer p = pointer()) noexcept; 333 void reset(nullptr_t) noexcept; 334 template <class U> void reset(U) = delete; 335 void swap(unique_ptr& u) noexcept; 336}; 337 338template <class T, class D> 339 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 340 341template <class T1, class D1, class T2, class D2> 342 bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 343template <class T1, class D1, class T2, class D2> 344 bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 345template <class T1, class D1, class T2, class D2> 346 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 347template <class T1, class D1, class T2, class D2> 348 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 349template <class T1, class D1, class T2, class D2> 350 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 351template <class T1, class D1, class T2, class D2> 352 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 353 354template <class T, class D> 355 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 356template <class T, class D> 357 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 358template <class T, class D> 359 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 360template <class T, class D> 361 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 362 363template <class T, class D> 364 bool operator<(const unique_ptr<T, D>& x, nullptr_t); 365template <class T, class D> 366 bool operator<(nullptr_t, const unique_ptr<T, D>& y); 367template <class T, class D> 368 bool operator<=(const unique_ptr<T, D>& x, nullptr_t); 369template <class T, class D> 370 bool operator<=(nullptr_t, const unique_ptr<T, D>& y); 371template <class T, class D> 372 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 373template <class T, class D> 374 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 375template <class T, class D> 376 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 377template <class T, class D> 378 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 379 380class bad_weak_ptr 381 : public std::exception 382{ 383 bad_weak_ptr() noexcept; 384}; 385 386template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 387template<class T> unique_ptr<T> make_unique(size_t n); // C++14 388template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 389 390template<class E, class T, class Y, class D> 391 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); 392 393template<class T> 394class shared_ptr 395{ 396public: 397 typedef T element_type; 398 typedef weak_ptr<T> weak_type; // C++17 399 400 // constructors: 401 constexpr shared_ptr() noexcept; 402 template<class Y> explicit shared_ptr(Y* p); 403 template<class Y, class D> shared_ptr(Y* p, D d); 404 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 405 template <class D> shared_ptr(nullptr_t p, D d); 406 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 407 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 408 shared_ptr(const shared_ptr& r) noexcept; 409 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 410 shared_ptr(shared_ptr&& r) noexcept; 411 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 412 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 413 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 414 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 415 shared_ptr(nullptr_t) : shared_ptr() { } 416 417 // destructor: 418 ~shared_ptr(); 419 420 // assignment: 421 shared_ptr& operator=(const shared_ptr& r) noexcept; 422 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 423 shared_ptr& operator=(shared_ptr&& r) noexcept; 424 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 425 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 426 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 427 428 // modifiers: 429 void swap(shared_ptr& r) noexcept; 430 void reset() noexcept; 431 template<class Y> void reset(Y* p); 432 template<class Y, class D> void reset(Y* p, D d); 433 template<class Y, class D, class A> void reset(Y* p, D d, A a); 434 435 // observers: 436 T* get() const noexcept; 437 T& operator*() const noexcept; 438 T* operator->() const noexcept; 439 long use_count() const noexcept; 440 bool unique() const noexcept; 441 explicit operator bool() const noexcept; 442 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 443 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 444}; 445 446// shared_ptr comparisons: 447template<class T, class U> 448 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 449template<class T, class U> 450 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 451template<class T, class U> 452 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 453template<class T, class U> 454 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 455template<class T, class U> 456 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 457template<class T, class U> 458 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 459 460template <class T> 461 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; 462template <class T> 463 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; 464template <class T> 465 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; 466template <class T> 467 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; 468template <class T> 469 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; 470template <class T> 471bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 472template <class T> 473 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 474template <class T> 475 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 476template <class T> 477 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 478template <class T> 479 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 480template <class T> 481 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 482template <class T> 483 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 484 485// shared_ptr specialized algorithms: 486template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 487 488// shared_ptr casts: 489template<class T, class U> 490 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 491template<class T, class U> 492 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 493template<class T, class U> 494 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 495 496// shared_ptr I/O: 497template<class E, class T, class Y> 498 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 499 500// shared_ptr get_deleter: 501template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 502 503template<class T, class... Args> 504 shared_ptr<T> make_shared(Args&&... args); 505template<class T, class A, class... Args> 506 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 507 508template<class T> 509class weak_ptr 510{ 511public: 512 typedef T element_type; 513 514 // constructors 515 constexpr weak_ptr() noexcept; 516 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 517 weak_ptr(weak_ptr const& r) noexcept; 518 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 519 weak_ptr(weak_ptr&& r) noexcept; // C++14 520 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 521 522 // destructor 523 ~weak_ptr(); 524 525 // assignment 526 weak_ptr& operator=(weak_ptr const& r) noexcept; 527 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 528 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 529 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 530 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 531 532 // modifiers 533 void swap(weak_ptr& r) noexcept; 534 void reset() noexcept; 535 536 // observers 537 long use_count() const noexcept; 538 bool expired() const noexcept; 539 shared_ptr<T> lock() const noexcept; 540 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 541 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 542}; 543 544// weak_ptr specialized algorithms: 545template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 546 547// class owner_less: 548template<class T> struct owner_less; 549 550template<class T> 551struct owner_less<shared_ptr<T> > 552 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 553{ 554 typedef bool result_type; 555 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 556 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 557 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 558}; 559 560template<class T> 561struct owner_less<weak_ptr<T> > 562 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 563{ 564 typedef bool result_type; 565 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 566 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 567 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 568}; 569 570template <> // Added in C++14 571struct owner_less<void> 572{ 573 template <class _Tp, class _Up> 574 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 575 template <class _Tp, class _Up> 576 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 577 template <class _Tp, class _Up> 578 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 579 template <class _Tp, class _Up> 580 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 581 582 typedef void is_transparent; 583}; 584 585template<class T> 586class enable_shared_from_this 587{ 588protected: 589 constexpr enable_shared_from_this() noexcept; 590 enable_shared_from_this(enable_shared_from_this const&) noexcept; 591 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 592 ~enable_shared_from_this(); 593public: 594 shared_ptr<T> shared_from_this(); 595 shared_ptr<T const> shared_from_this() const; 596}; 597 598template<class T> 599 bool atomic_is_lock_free(const shared_ptr<T>* p); 600template<class T> 601 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 602template<class T> 603 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 604template<class T> 605 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 606template<class T> 607 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 608template<class T> 609 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 610template<class T> 611 shared_ptr<T> 612 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 613template<class T> 614 bool 615 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 616template<class T> 617 bool 618 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 619template<class T> 620 bool 621 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 622 shared_ptr<T> w, memory_order success, 623 memory_order failure); 624template<class T> 625 bool 626 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 627 shared_ptr<T> w, memory_order success, 628 memory_order failure); 629// Hash support 630template <class T> struct hash; 631template <class T, class D> struct hash<unique_ptr<T, D> >; 632template <class T> struct hash<shared_ptr<T> >; 633 634template <class T, class Alloc> 635 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; 636 637// Pointer safety 638enum class pointer_safety { relaxed, preferred, strict }; 639void declare_reachable(void *p); 640template <class T> T *undeclare_reachable(T *p); 641void declare_no_pointers(char *p, size_t n); 642void undeclare_no_pointers(char *p, size_t n); 643pointer_safety get_pointer_safety() noexcept; 644 645void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 646 647} // std 648 649*/ 650 651#include <__config> 652#include <type_traits> 653#include <typeinfo> 654#include <cstddef> 655#include <cstdint> 656#include <new> 657#include <utility> 658#include <limits> 659#include <iterator> 660#include <__functional_base> 661#include <iosfwd> 662#include <tuple> 663#include <stdexcept> 664#include <cstring> 665#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 666# include <atomic> 667#endif 668#include <version> 669 670#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 671#pragma GCC system_header 672#endif 673 674_LIBCPP_PUSH_MACROS 675#include <__undef_macros> 676 677 678_LIBCPP_BEGIN_NAMESPACE_STD 679 680template <class _ValueType> 681inline _LIBCPP_INLINE_VISIBILITY 682_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 683#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 684 defined(__ATOMIC_RELAXED) && \ 685 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 686 return __atomic_load_n(__value, __ATOMIC_RELAXED); 687#else 688 return *__value; 689#endif 690} 691 692template <class _ValueType> 693inline _LIBCPP_INLINE_VISIBILITY 694_ValueType __libcpp_acquire_load(_ValueType const* __value) { 695#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 696 defined(__ATOMIC_ACQUIRE) && \ 697 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 698 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 699#else 700 return *__value; 701#endif 702} 703 704// addressof moved to <type_traits> 705 706template <class _Tp> class allocator; 707 708template <> 709class _LIBCPP_TEMPLATE_VIS allocator<void> 710{ 711public: 712 typedef void* pointer; 713 typedef const void* const_pointer; 714 typedef void value_type; 715 716 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 717}; 718 719template <> 720class _LIBCPP_TEMPLATE_VIS allocator<const void> 721{ 722public: 723 typedef const void* pointer; 724 typedef const void* const_pointer; 725 typedef const void value_type; 726 727 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 728}; 729 730// pointer_traits 731 732template <class _Tp, class = void> 733struct __has_element_type : false_type {}; 734 735template <class _Tp> 736struct __has_element_type<_Tp, 737 typename __void_t<typename _Tp::element_type>::type> : true_type {}; 738 739template <class _Ptr, bool = __has_element_type<_Ptr>::value> 740struct __pointer_traits_element_type; 741 742template <class _Ptr> 743struct __pointer_traits_element_type<_Ptr, true> 744{ 745 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::element_type type; 746}; 747 748#ifndef _LIBCPP_HAS_NO_VARIADICS 749 750template <template <class, class...> class _Sp, class _Tp, class ..._Args> 751struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true> 752{ 753 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::element_type type; 754}; 755 756template <template <class, class...> class _Sp, class _Tp, class ..._Args> 757struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false> 758{ 759 typedef _LIBCPP_NODEBUG_TYPE _Tp type; 760}; 761 762#else // _LIBCPP_HAS_NO_VARIADICS 763 764template <template <class> class _Sp, class _Tp> 765struct __pointer_traits_element_type<_Sp<_Tp>, true> 766{ 767 typedef typename _Sp<_Tp>::element_type type; 768}; 769 770template <template <class> class _Sp, class _Tp> 771struct __pointer_traits_element_type<_Sp<_Tp>, false> 772{ 773 typedef _Tp type; 774}; 775 776template <template <class, class> class _Sp, class _Tp, class _A0> 777struct __pointer_traits_element_type<_Sp<_Tp, _A0>, true> 778{ 779 typedef typename _Sp<_Tp, _A0>::element_type type; 780}; 781 782template <template <class, class> class _Sp, class _Tp, class _A0> 783struct __pointer_traits_element_type<_Sp<_Tp, _A0>, false> 784{ 785 typedef _Tp type; 786}; 787 788template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 789struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, true> 790{ 791 typedef typename _Sp<_Tp, _A0, _A1>::element_type type; 792}; 793 794template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 795struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, false> 796{ 797 typedef _Tp type; 798}; 799 800template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 801 class _A1, class _A2> 802struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, true> 803{ 804 typedef typename _Sp<_Tp, _A0, _A1, _A2>::element_type type; 805}; 806 807template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 808 class _A1, class _A2> 809struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false> 810{ 811 typedef _Tp type; 812}; 813 814#endif // _LIBCPP_HAS_NO_VARIADICS 815 816template <class _Tp, class = void> 817struct __has_difference_type : false_type {}; 818 819template <class _Tp> 820struct __has_difference_type<_Tp, 821 typename __void_t<typename _Tp::difference_type>::type> : true_type {}; 822 823template <class _Ptr, bool = __has_difference_type<_Ptr>::value> 824struct __pointer_traits_difference_type 825{ 826 typedef _LIBCPP_NODEBUG_TYPE ptrdiff_t type; 827}; 828 829template <class _Ptr> 830struct __pointer_traits_difference_type<_Ptr, true> 831{ 832 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::difference_type type; 833}; 834 835template <class _Tp, class _Up> 836struct __has_rebind 837{ 838private: 839 struct __two {char __lx; char __lxx;}; 840 template <class _Xp> static __two __test(...); 841 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0); 842public: 843 static const bool value = sizeof(__test<_Tp>(0)) == 1; 844}; 845 846template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 847struct __pointer_traits_rebind 848{ 849#ifndef _LIBCPP_CXX03_LANG 850 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up> type; 851#else 852 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 853#endif 854}; 855 856#ifndef _LIBCPP_HAS_NO_VARIADICS 857 858template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 859struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true> 860{ 861#ifndef _LIBCPP_CXX03_LANG 862 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up> type; 863#else 864 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type; 865#endif 866}; 867 868template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 869struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false> 870{ 871 typedef _Sp<_Up, _Args...> type; 872}; 873 874#else // _LIBCPP_HAS_NO_VARIADICS 875 876template <template <class> class _Sp, class _Tp, class _Up> 877struct __pointer_traits_rebind<_Sp<_Tp>, _Up, true> 878{ 879#ifndef _LIBCPP_CXX03_LANG 880 typedef typename _Sp<_Tp>::template rebind<_Up> type; 881#else 882 typedef typename _Sp<_Tp>::template rebind<_Up>::other type; 883#endif 884}; 885 886template <template <class> class _Sp, class _Tp, class _Up> 887struct __pointer_traits_rebind<_Sp<_Tp>, _Up, false> 888{ 889 typedef _Sp<_Up> type; 890}; 891 892template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 893struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, true> 894{ 895#ifndef _LIBCPP_CXX03_LANG 896 typedef typename _Sp<_Tp, _A0>::template rebind<_Up> type; 897#else 898 typedef typename _Sp<_Tp, _A0>::template rebind<_Up>::other type; 899#endif 900}; 901 902template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 903struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, false> 904{ 905 typedef _Sp<_Up, _A0> type; 906}; 907 908template <template <class, class, class> class _Sp, class _Tp, class _A0, 909 class _A1, class _Up> 910struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, true> 911{ 912#ifndef _LIBCPP_CXX03_LANG 913 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up> type; 914#else 915 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up>::other type; 916#endif 917}; 918 919template <template <class, class, class> class _Sp, class _Tp, class _A0, 920 class _A1, class _Up> 921struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, false> 922{ 923 typedef _Sp<_Up, _A0, _A1> type; 924}; 925 926template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 927 class _A1, class _A2, class _Up> 928struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, true> 929{ 930#ifndef _LIBCPP_CXX03_LANG 931 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up> type; 932#else 933 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 934#endif 935}; 936 937template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 938 class _A1, class _A2, class _Up> 939struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, false> 940{ 941 typedef _Sp<_Up, _A0, _A1, _A2> type; 942}; 943 944#endif // _LIBCPP_HAS_NO_VARIADICS 945 946template <class _Ptr> 947struct _LIBCPP_TEMPLATE_VIS pointer_traits 948{ 949 typedef _Ptr pointer; 950 typedef typename __pointer_traits_element_type<pointer>::type element_type; 951 typedef typename __pointer_traits_difference_type<pointer>::type difference_type; 952 953#ifndef _LIBCPP_CXX03_LANG 954 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type; 955#else 956 template <class _Up> struct rebind 957 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;}; 958#endif // _LIBCPP_CXX03_LANG 959 960private: 961 struct __nat {}; 962public: 963 _LIBCPP_INLINE_VISIBILITY 964 static pointer pointer_to(typename conditional<is_void<element_type>::value, 965 __nat, element_type>::type& __r) 966 {return pointer::pointer_to(__r);} 967}; 968 969template <class _Tp> 970struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*> 971{ 972 typedef _Tp* pointer; 973 typedef _Tp element_type; 974 typedef ptrdiff_t difference_type; 975 976#ifndef _LIBCPP_CXX03_LANG 977 template <class _Up> using rebind = _Up*; 978#else 979 template <class _Up> struct rebind {typedef _Up* other;}; 980#endif 981 982private: 983 struct __nat {}; 984public: 985 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 986 static pointer pointer_to(typename conditional<is_void<element_type>::value, 987 __nat, element_type>::type& __r) _NOEXCEPT 988 {return _VSTD::addressof(__r);} 989}; 990 991template <class _From, class _To> 992struct __rebind_pointer { 993#ifndef _LIBCPP_CXX03_LANG 994 typedef typename pointer_traits<_From>::template rebind<_To> type; 995#else 996 typedef typename pointer_traits<_From>::template rebind<_To>::other type; 997#endif 998}; 999 1000// allocator_traits 1001 1002template <class _Tp, class = void> 1003struct __has_pointer_type : false_type {}; 1004 1005template <class _Tp> 1006struct __has_pointer_type<_Tp, 1007 typename __void_t<typename _Tp::pointer>::type> : true_type {}; 1008 1009namespace __pointer_type_imp 1010{ 1011 1012template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value> 1013struct __pointer_type 1014{ 1015 typedef _LIBCPP_NODEBUG_TYPE typename _Dp::pointer type; 1016}; 1017 1018template <class _Tp, class _Dp> 1019struct __pointer_type<_Tp, _Dp, false> 1020{ 1021 typedef _LIBCPP_NODEBUG_TYPE _Tp* type; 1022}; 1023 1024} // __pointer_type_imp 1025 1026template <class _Tp, class _Dp> 1027struct __pointer_type 1028{ 1029 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; 1030}; 1031 1032template <class _Tp, class = void> 1033struct __has_const_pointer : false_type {}; 1034 1035template <class _Tp> 1036struct __has_const_pointer<_Tp, 1037 typename __void_t<typename _Tp::const_pointer>::type> : true_type {}; 1038 1039template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> 1040struct __const_pointer 1041{ 1042 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_pointer type; 1043}; 1044 1045template <class _Tp, class _Ptr, class _Alloc> 1046struct __const_pointer<_Tp, _Ptr, _Alloc, false> 1047{ 1048#ifndef _LIBCPP_CXX03_LANG 1049 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const _Tp> type; 1050#else 1051 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type; 1052#endif 1053}; 1054 1055template <class _Tp, class = void> 1056struct __has_void_pointer : false_type {}; 1057 1058template <class _Tp> 1059struct __has_void_pointer<_Tp, 1060 typename __void_t<typename _Tp::void_pointer>::type> : true_type {}; 1061 1062template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> 1063struct __void_pointer 1064{ 1065 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::void_pointer type; 1066}; 1067 1068template <class _Ptr, class _Alloc> 1069struct __void_pointer<_Ptr, _Alloc, false> 1070{ 1071#ifndef _LIBCPP_CXX03_LANG 1072 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void> type; 1073#else 1074 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void>::other type; 1075#endif 1076}; 1077 1078template <class _Tp, class = void> 1079struct __has_const_void_pointer : false_type {}; 1080 1081template <class _Tp> 1082struct __has_const_void_pointer<_Tp, 1083 typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {}; 1084 1085template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> 1086struct __const_void_pointer 1087{ 1088 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_void_pointer type; 1089}; 1090 1091template <class _Ptr, class _Alloc> 1092struct __const_void_pointer<_Ptr, _Alloc, false> 1093{ 1094#ifndef _LIBCPP_CXX03_LANG 1095 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void> type; 1096#else 1097 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void>::other type; 1098#endif 1099}; 1100 1101template <class _Tp> 1102inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1103_Tp* 1104__to_raw_pointer(_Tp* __p) _NOEXCEPT 1105{ 1106 return __p; 1107} 1108 1109#if _LIBCPP_STD_VER <= 17 1110template <class _Pointer> 1111inline _LIBCPP_INLINE_VISIBILITY 1112typename pointer_traits<_Pointer>::element_type* 1113__to_raw_pointer(_Pointer __p) _NOEXCEPT 1114{ 1115 return _VSTD::__to_raw_pointer(__p.operator->()); 1116} 1117#else 1118template <class _Pointer> 1119inline _LIBCPP_INLINE_VISIBILITY 1120auto 1121__to_raw_pointer(const _Pointer& __p) _NOEXCEPT 1122-> decltype(pointer_traits<_Pointer>::to_address(__p)) 1123{ 1124 return pointer_traits<_Pointer>::to_address(__p); 1125} 1126 1127template <class _Pointer, class... _None> 1128inline _LIBCPP_INLINE_VISIBILITY 1129auto 1130__to_raw_pointer(const _Pointer& __p, _None...) _NOEXCEPT 1131{ 1132 return _VSTD::__to_raw_pointer(__p.operator->()); 1133} 1134 1135template <class _Tp> 1136inline _LIBCPP_INLINE_VISIBILITY constexpr 1137_Tp* 1138to_address(_Tp* __p) _NOEXCEPT 1139{ 1140 static_assert(!is_function_v<_Tp>, "_Tp is a function type"); 1141 return __p; 1142} 1143 1144template <class _Pointer> 1145inline _LIBCPP_INLINE_VISIBILITY 1146auto 1147to_address(const _Pointer& __p) _NOEXCEPT 1148{ 1149 return _VSTD::__to_raw_pointer(__p); 1150} 1151#endif 1152 1153template <class _Tp, class = void> 1154struct __has_size_type : false_type {}; 1155 1156template <class _Tp> 1157struct __has_size_type<_Tp, 1158 typename __void_t<typename _Tp::size_type>::type> : true_type {}; 1159 1160template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> 1161struct __size_type 1162{ 1163 typedef _LIBCPP_NODEBUG_TYPE typename make_unsigned<_DiffType>::type type; 1164}; 1165 1166template <class _Alloc, class _DiffType> 1167struct __size_type<_Alloc, _DiffType, true> 1168{ 1169 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::size_type type; 1170}; 1171 1172template <class _Tp, class = void> 1173struct __has_propagate_on_container_copy_assignment : false_type {}; 1174 1175template <class _Tp> 1176struct __has_propagate_on_container_copy_assignment<_Tp, 1177 typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type> 1178 : true_type {}; 1179 1180template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> 1181struct __propagate_on_container_copy_assignment 1182{ 1183 typedef _LIBCPP_NODEBUG_TYPE false_type type; 1184}; 1185 1186template <class _Alloc> 1187struct __propagate_on_container_copy_assignment<_Alloc, true> 1188{ 1189 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_copy_assignment type; 1190}; 1191 1192template <class _Tp, class = void> 1193struct __has_propagate_on_container_move_assignment : false_type {}; 1194 1195template <class _Tp> 1196struct __has_propagate_on_container_move_assignment<_Tp, 1197 typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type> 1198 : true_type {}; 1199 1200template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> 1201struct __propagate_on_container_move_assignment 1202{ 1203 typedef false_type type; 1204}; 1205 1206template <class _Alloc> 1207struct __propagate_on_container_move_assignment<_Alloc, true> 1208{ 1209 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_move_assignment type; 1210}; 1211 1212template <class _Tp, class = void> 1213struct __has_propagate_on_container_swap : false_type {}; 1214 1215template <class _Tp> 1216struct __has_propagate_on_container_swap<_Tp, 1217 typename __void_t<typename _Tp::propagate_on_container_swap>::type> 1218 : true_type {}; 1219 1220template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> 1221struct __propagate_on_container_swap 1222{ 1223 typedef false_type type; 1224}; 1225 1226template <class _Alloc> 1227struct __propagate_on_container_swap<_Alloc, true> 1228{ 1229 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_swap type; 1230}; 1231 1232template <class _Tp, class = void> 1233struct __has_is_always_equal : false_type {}; 1234 1235template <class _Tp> 1236struct __has_is_always_equal<_Tp, 1237 typename __void_t<typename _Tp::is_always_equal>::type> 1238 : true_type {}; 1239 1240template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> 1241struct __is_always_equal 1242{ 1243 typedef _LIBCPP_NODEBUG_TYPE typename _VSTD::is_empty<_Alloc>::type type; 1244}; 1245 1246template <class _Alloc> 1247struct __is_always_equal<_Alloc, true> 1248{ 1249 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::is_always_equal type; 1250}; 1251 1252template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 1253struct __has_rebind_other 1254{ 1255private: 1256 struct __two {char __lx; char __lxx;}; 1257 template <class _Xp> static __two __test(...); 1258 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0); 1259public: 1260 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1261}; 1262 1263template <class _Tp, class _Up> 1264struct __has_rebind_other<_Tp, _Up, false> 1265{ 1266 static const bool value = false; 1267}; 1268 1269template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value> 1270struct __allocator_traits_rebind 1271{ 1272 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 1273}; 1274 1275#ifndef _LIBCPP_HAS_NO_VARIADICS 1276 1277template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1278struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true> 1279{ 1280 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type; 1281}; 1282 1283template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1284struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false> 1285{ 1286 typedef _LIBCPP_NODEBUG_TYPE _Alloc<_Up, _Args...> type; 1287}; 1288 1289#else // _LIBCPP_HAS_NO_VARIADICS 1290 1291template <template <class> class _Alloc, class _Tp, class _Up> 1292struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, true> 1293{ 1294 typedef typename _Alloc<_Tp>::template rebind<_Up>::other type; 1295}; 1296 1297template <template <class> class _Alloc, class _Tp, class _Up> 1298struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, false> 1299{ 1300 typedef _Alloc<_Up> type; 1301}; 1302 1303template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1304struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, true> 1305{ 1306 typedef typename _Alloc<_Tp, _A0>::template rebind<_Up>::other type; 1307}; 1308 1309template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1310struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, false> 1311{ 1312 typedef _Alloc<_Up, _A0> type; 1313}; 1314 1315template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1316 class _A1, class _Up> 1317struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, true> 1318{ 1319 typedef typename _Alloc<_Tp, _A0, _A1>::template rebind<_Up>::other type; 1320}; 1321 1322template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1323 class _A1, class _Up> 1324struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, false> 1325{ 1326 typedef _Alloc<_Up, _A0, _A1> type; 1327}; 1328 1329template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1330 class _A1, class _A2, class _Up> 1331struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, true> 1332{ 1333 typedef typename _Alloc<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 1334}; 1335 1336template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1337 class _A1, class _A2, class _Up> 1338struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, false> 1339{ 1340 typedef _Alloc<_Up, _A0, _A1, _A2> type; 1341}; 1342 1343#endif // _LIBCPP_HAS_NO_VARIADICS 1344 1345#ifndef _LIBCPP_CXX03_LANG 1346 1347template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1348auto 1349__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1350 -> decltype((void)__a.allocate(__sz, __p), true_type()); 1351 1352template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1353auto 1354__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1355 -> false_type; 1356 1357template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1358struct __has_allocate_hint 1359 : integral_constant<bool, 1360 is_same< 1361 decltype(_VSTD::__has_allocate_hint_test(declval<_Alloc>(), 1362 declval<_SizeType>(), 1363 declval<_ConstVoidPtr>())), 1364 true_type>::value> 1365{ 1366}; 1367 1368#else // _LIBCPP_CXX03_LANG 1369 1370template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1371struct __has_allocate_hint 1372 : true_type 1373{ 1374}; 1375 1376#endif // _LIBCPP_CXX03_LANG 1377 1378#if !defined(_LIBCPP_CXX03_LANG) 1379 1380template <class _Alloc, class _Tp, class ..._Args> 1381decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Tp*>(), 1382 _VSTD::declval<_Args>()...), 1383 true_type()) 1384__has_construct_test(_Alloc&& __a, _Tp* __p, _Args&& ...__args); 1385 1386template <class _Alloc, class _Pointer, class ..._Args> 1387false_type 1388__has_construct_test(const _Alloc& __a, _Pointer&& __p, _Args&& ...__args); 1389 1390template <class _Alloc, class _Pointer, class ..._Args> 1391struct __has_construct 1392 : integral_constant<bool, 1393 is_same< 1394 decltype(_VSTD::__has_construct_test(declval<_Alloc>(), 1395 declval<_Pointer>(), 1396 declval<_Args>()...)), 1397 true_type>::value> 1398{ 1399}; 1400 1401template <class _Alloc, class _Pointer> 1402auto 1403__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1404 -> decltype(__a.destroy(__p), true_type()); 1405 1406template <class _Alloc, class _Pointer> 1407auto 1408__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1409 -> false_type; 1410 1411template <class _Alloc, class _Pointer> 1412struct __has_destroy 1413 : integral_constant<bool, 1414 is_same< 1415 decltype(_VSTD::__has_destroy_test(declval<_Alloc>(), 1416 declval<_Pointer>())), 1417 true_type>::value> 1418{ 1419}; 1420 1421template <class _Alloc> 1422auto 1423__has_max_size_test(_Alloc&& __a) 1424 -> decltype(__a.max_size(), true_type()); 1425 1426template <class _Alloc> 1427auto 1428__has_max_size_test(const volatile _Alloc& __a) 1429 -> false_type; 1430 1431template <class _Alloc> 1432struct __has_max_size 1433 : integral_constant<bool, 1434 is_same< 1435 decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())), 1436 true_type>::value> 1437{ 1438}; 1439 1440template <class _Alloc> 1441auto 1442__has_select_on_container_copy_construction_test(_Alloc&& __a) 1443 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1444 1445template <class _Alloc> 1446auto 1447__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1448 -> false_type; 1449 1450template <class _Alloc> 1451struct __has_select_on_container_copy_construction 1452 : integral_constant<bool, 1453 is_same< 1454 decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())), 1455 true_type>::value> 1456{ 1457}; 1458 1459#else // _LIBCPP_CXX03_LANG 1460 1461template <class _Alloc, class _Pointer, class _Tp, class = void> 1462struct __has_construct : std::false_type {}; 1463 1464template <class _Alloc, class _Pointer, class _Tp> 1465struct __has_construct<_Alloc, _Pointer, _Tp, typename __void_t< 1466 decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Pointer>(), _VSTD::declval<_Tp>())) 1467>::type> : std::true_type {}; 1468 1469template <class _Alloc, class _Pointer, class = void> 1470struct __has_destroy : false_type {}; 1471 1472template <class _Alloc, class _Pointer> 1473struct __has_destroy<_Alloc, _Pointer, typename __void_t< 1474 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>())) 1475>::type> : std::true_type {}; 1476 1477template <class _Alloc> 1478struct __has_max_size 1479 : true_type 1480{ 1481}; 1482 1483template <class _Alloc> 1484struct __has_select_on_container_copy_construction 1485 : false_type 1486{ 1487}; 1488 1489#endif // _LIBCPP_CXX03_LANG 1490 1491template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1492struct __alloc_traits_difference_type 1493{ 1494 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::difference_type type; 1495}; 1496 1497template <class _Alloc, class _Ptr> 1498struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1499{ 1500 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::difference_type type; 1501}; 1502 1503template <class _Tp> 1504struct __is_default_allocator : false_type {}; 1505 1506template <class _Tp> 1507struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {}; 1508 1509 1510 1511template <class _Alloc, 1512 bool = __has_construct<_Alloc, typename _Alloc::value_type*, typename _Alloc::value_type&&>::value && !__is_default_allocator<_Alloc>::value 1513 > 1514struct __is_cpp17_move_insertable; 1515template <class _Alloc> 1516struct __is_cpp17_move_insertable<_Alloc, true> : std::true_type {}; 1517template <class _Alloc> 1518struct __is_cpp17_move_insertable<_Alloc, false> : std::is_move_constructible<typename _Alloc::value_type> {}; 1519 1520template <class _Alloc, 1521 bool = __has_construct<_Alloc, typename _Alloc::value_type*, const typename _Alloc::value_type&>::value && !__is_default_allocator<_Alloc>::value 1522 > 1523struct __is_cpp17_copy_insertable; 1524template <class _Alloc> 1525struct __is_cpp17_copy_insertable<_Alloc, true> : __is_cpp17_move_insertable<_Alloc> {}; 1526template <class _Alloc> 1527struct __is_cpp17_copy_insertable<_Alloc, false> : integral_constant<bool, 1528 std::is_copy_constructible<typename _Alloc::value_type>::value && 1529 __is_cpp17_move_insertable<_Alloc>::value> 1530 {}; 1531 1532 1533 1534template <class _Alloc> 1535struct _LIBCPP_TEMPLATE_VIS allocator_traits 1536{ 1537 typedef _Alloc allocator_type; 1538 typedef typename allocator_type::value_type value_type; 1539 1540 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1541 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1542 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1543 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1544 1545 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1546 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1547 1548 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1549 propagate_on_container_copy_assignment; 1550 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1551 propagate_on_container_move_assignment; 1552 typedef typename __propagate_on_container_swap<allocator_type>::type 1553 propagate_on_container_swap; 1554 typedef typename __is_always_equal<allocator_type>::type 1555 is_always_equal; 1556 1557#ifndef _LIBCPP_CXX03_LANG 1558 template <class _Tp> using rebind_alloc = 1559 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1560 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp> >; 1561#else // _LIBCPP_CXX03_LANG 1562 template <class _Tp> struct rebind_alloc 1563 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1564 template <class _Tp> struct rebind_traits 1565 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1566#endif // _LIBCPP_CXX03_LANG 1567 1568 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1569 static pointer allocate(allocator_type& __a, size_type __n) 1570 {return __a.allocate(__n);} 1571 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1572 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1573 {return __allocate(__a, __n, __hint, 1574 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1575 1576 _LIBCPP_INLINE_VISIBILITY 1577 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1578 {__a.deallocate(__p, __n);} 1579 1580#ifndef _LIBCPP_HAS_NO_VARIADICS 1581 template <class _Tp, class... _Args> 1582 _LIBCPP_INLINE_VISIBILITY 1583 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1584 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1585 __a, __p, _VSTD::forward<_Args>(__args)...);} 1586#else // _LIBCPP_HAS_NO_VARIADICS 1587 template <class _Tp> 1588 _LIBCPP_INLINE_VISIBILITY 1589 static void construct(allocator_type&, _Tp* __p) 1590 { 1591 ::new ((void*)__p) _Tp(); 1592 } 1593 template <class _Tp, class _A0> 1594 _LIBCPP_INLINE_VISIBILITY 1595 static void construct(allocator_type& __a, _Tp* __p, const _A0& __a0) 1596 { 1597 __construct(__has_construct<allocator_type, _Tp*, const _A0&>(), 1598 __a, __p, __a0); 1599 } 1600 template <class _Tp, class _A0, class _A1> 1601 _LIBCPP_INLINE_VISIBILITY 1602 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1603 const _A1& __a1) 1604 { 1605 ::new ((void*)__p) _Tp(__a0, __a1); 1606 } 1607 template <class _Tp, class _A0, class _A1, class _A2> 1608 _LIBCPP_INLINE_VISIBILITY 1609 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1610 const _A1& __a1, const _A2& __a2) 1611 { 1612 ::new ((void*)__p) _Tp(__a0, __a1, __a2); 1613 } 1614#endif // _LIBCPP_HAS_NO_VARIADICS 1615 1616 template <class _Tp> 1617 _LIBCPP_INLINE_VISIBILITY 1618 static void destroy(allocator_type& __a, _Tp* __p) 1619 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1620 1621 _LIBCPP_INLINE_VISIBILITY 1622 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1623 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1624 1625 _LIBCPP_INLINE_VISIBILITY 1626 static allocator_type 1627 select_on_container_copy_construction(const allocator_type& __a) 1628 {return __select_on_container_copy_construction( 1629 __has_select_on_container_copy_construction<const allocator_type>(), 1630 __a);} 1631 1632 template <class _Ptr> 1633 _LIBCPP_INLINE_VISIBILITY 1634 static 1635 void 1636 __construct_forward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1637 { 1638 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1639 "The specified type does not meet the requirements of Cpp17MoveInsertible"); 1640 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1641 construct(__a, _VSTD::__to_raw_pointer(__begin2), 1642#ifdef _LIBCPP_NO_EXCEPTIONS 1643 _VSTD::move(*__begin1) 1644#else 1645 _VSTD::move_if_noexcept(*__begin1) 1646#endif 1647 ); 1648 } 1649 1650 template <class _Tp> 1651 _LIBCPP_INLINE_VISIBILITY 1652 static 1653 typename enable_if 1654 < 1655 (__is_default_allocator<allocator_type>::value 1656 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1657 is_trivially_move_constructible<_Tp>::value, 1658 void 1659 >::type 1660 __construct_forward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1661 { 1662 ptrdiff_t _Np = __end1 - __begin1; 1663 if (_Np > 0) 1664 { 1665 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1666 __begin2 += _Np; 1667 } 1668 } 1669 1670 template <class _Iter, class _Ptr> 1671 _LIBCPP_INLINE_VISIBILITY 1672 static 1673 void 1674 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1675 { 1676 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1677 construct(__a, _VSTD::__to_raw_pointer(__begin2), *__begin1); 1678 } 1679 1680 template <class _SourceTp, class _DestTp, 1681 class _RawSourceTp = typename remove_const<_SourceTp>::type, 1682 class _RawDestTp = typename remove_const<_DestTp>::type> 1683 _LIBCPP_INLINE_VISIBILITY 1684 static 1685 typename enable_if 1686 < 1687 is_trivially_move_constructible<_DestTp>::value && 1688 is_same<_RawSourceTp, _RawDestTp>::value && 1689 (__is_default_allocator<allocator_type>::value || 1690 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value), 1691 void 1692 >::type 1693 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2) 1694 { 1695 ptrdiff_t _Np = __end1 - __begin1; 1696 if (_Np > 0) 1697 { 1698 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp)); 1699 __begin2 += _Np; 1700 } 1701 } 1702 1703 template <class _Ptr> 1704 _LIBCPP_INLINE_VISIBILITY 1705 static 1706 void 1707 __construct_backward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1708 { 1709 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1710 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 1711 while (__end1 != __begin1) 1712 { 1713 construct(__a, _VSTD::__to_raw_pointer(__end2 - 1), 1714#ifdef _LIBCPP_NO_EXCEPTIONS 1715 _VSTD::move(*--__end1) 1716#else 1717 _VSTD::move_if_noexcept(*--__end1) 1718#endif 1719 ); 1720 --__end2; 1721 } 1722 } 1723 1724 template <class _Tp> 1725 _LIBCPP_INLINE_VISIBILITY 1726 static 1727 typename enable_if 1728 < 1729 (__is_default_allocator<allocator_type>::value 1730 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1731 is_trivially_move_constructible<_Tp>::value, 1732 void 1733 >::type 1734 __construct_backward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1735 { 1736 ptrdiff_t _Np = __end1 - __begin1; 1737 __end2 -= _Np; 1738 if (_Np > 0) 1739 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1740 } 1741 1742private: 1743 1744 _LIBCPP_INLINE_VISIBILITY 1745 static pointer __allocate(allocator_type& __a, size_type __n, 1746 const_void_pointer __hint, true_type) 1747 {return __a.allocate(__n, __hint);} 1748 _LIBCPP_INLINE_VISIBILITY 1749 static pointer __allocate(allocator_type& __a, size_type __n, 1750 const_void_pointer, false_type) 1751 {return __a.allocate(__n);} 1752 1753#ifndef _LIBCPP_HAS_NO_VARIADICS 1754 template <class _Tp, class... _Args> 1755 _LIBCPP_INLINE_VISIBILITY 1756 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1757 {__a.construct(__p, _VSTD::forward<_Args>(__args)...);} 1758 template <class _Tp, class... _Args> 1759 _LIBCPP_INLINE_VISIBILITY 1760 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1761 { 1762 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1763 } 1764#else // _LIBCPP_HAS_NO_VARIADICS 1765 template <class _Tp, class _A0> 1766 _LIBCPP_INLINE_VISIBILITY 1767 static void __construct(true_type, allocator_type& __a, _Tp* __p, 1768 const _A0& __a0) 1769 {__a.construct(__p, __a0);} 1770 template <class _Tp, class _A0> 1771 _LIBCPP_INLINE_VISIBILITY 1772 static void __construct(false_type, allocator_type&, _Tp* __p, 1773 const _A0& __a0) 1774 { 1775 ::new ((void*)__p) _Tp(__a0); 1776 } 1777#endif // _LIBCPP_HAS_NO_VARIADICS 1778 1779 template <class _Tp> 1780 _LIBCPP_INLINE_VISIBILITY 1781 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1782 {__a.destroy(__p);} 1783 template <class _Tp> 1784 _LIBCPP_INLINE_VISIBILITY 1785 static void __destroy(false_type, allocator_type&, _Tp* __p) 1786 { 1787 __p->~_Tp(); 1788 } 1789 1790 _LIBCPP_INLINE_VISIBILITY 1791 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT 1792 {return __a.max_size();} 1793 _LIBCPP_INLINE_VISIBILITY 1794 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT 1795 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1796 1797 _LIBCPP_INLINE_VISIBILITY 1798 static allocator_type 1799 __select_on_container_copy_construction(true_type, const allocator_type& __a) 1800 {return __a.select_on_container_copy_construction();} 1801 _LIBCPP_INLINE_VISIBILITY 1802 static allocator_type 1803 __select_on_container_copy_construction(false_type, const allocator_type& __a) 1804 {return __a;} 1805}; 1806 1807template <class _Traits, class _Tp> 1808struct __rebind_alloc_helper 1809{ 1810#ifndef _LIBCPP_CXX03_LANG 1811 typedef _LIBCPP_NODEBUG_TYPE typename _Traits::template rebind_alloc<_Tp> type; 1812#else 1813 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1814#endif 1815}; 1816 1817// allocator 1818 1819template <class _Tp> 1820class _LIBCPP_TEMPLATE_VIS allocator 1821{ 1822public: 1823 typedef size_t size_type; 1824 typedef ptrdiff_t difference_type; 1825 typedef _Tp* pointer; 1826 typedef const _Tp* const_pointer; 1827 typedef _Tp& reference; 1828 typedef const _Tp& const_reference; 1829 typedef _Tp value_type; 1830 1831 typedef true_type propagate_on_container_move_assignment; 1832 typedef true_type is_always_equal; 1833 1834 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1835 1836 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1837 allocator() _NOEXCEPT {} 1838 1839 template <class _Up> 1840 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1841 allocator(const allocator<_Up>&) _NOEXCEPT {} 1842 1843 _LIBCPP_INLINE_VISIBILITY pointer address(reference __x) const _NOEXCEPT 1844 {return _VSTD::addressof(__x);} 1845 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1846 {return _VSTD::addressof(__x);} 1847 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1848 pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1849 { 1850 if (__n > max_size()) 1851 __throw_length_error("allocator<T>::allocate(size_t n)" 1852 " 'n' exceeds maximum supported size"); 1853 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1854 } 1855 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT 1856 {_VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1857 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1858 {return size_type(~0) / sizeof(_Tp);} 1859#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1860 template <class _Up, class... _Args> 1861 _LIBCPP_INLINE_VISIBILITY 1862 void 1863 construct(_Up* __p, _Args&&... __args) 1864 { 1865 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1866 } 1867#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1868 _LIBCPP_INLINE_VISIBILITY 1869 void 1870 construct(pointer __p) 1871 { 1872 ::new((void*)__p) _Tp(); 1873 } 1874# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1875 1876 template <class _A0> 1877 _LIBCPP_INLINE_VISIBILITY 1878 void 1879 construct(pointer __p, _A0& __a0) 1880 { 1881 ::new((void*)__p) _Tp(__a0); 1882 } 1883 template <class _A0> 1884 _LIBCPP_INLINE_VISIBILITY 1885 void 1886 construct(pointer __p, const _A0& __a0) 1887 { 1888 ::new((void*)__p) _Tp(__a0); 1889 } 1890# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1891 template <class _A0, class _A1> 1892 _LIBCPP_INLINE_VISIBILITY 1893 void 1894 construct(pointer __p, _A0& __a0, _A1& __a1) 1895 { 1896 ::new((void*)__p) _Tp(__a0, __a1); 1897 } 1898 template <class _A0, class _A1> 1899 _LIBCPP_INLINE_VISIBILITY 1900 void 1901 construct(pointer __p, const _A0& __a0, _A1& __a1) 1902 { 1903 ::new((void*)__p) _Tp(__a0, __a1); 1904 } 1905 template <class _A0, class _A1> 1906 _LIBCPP_INLINE_VISIBILITY 1907 void 1908 construct(pointer __p, _A0& __a0, const _A1& __a1) 1909 { 1910 ::new((void*)__p) _Tp(__a0, __a1); 1911 } 1912 template <class _A0, class _A1> 1913 _LIBCPP_INLINE_VISIBILITY 1914 void 1915 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1916 { 1917 ::new((void*)__p) _Tp(__a0, __a1); 1918 } 1919#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1920 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1921}; 1922 1923template <class _Tp> 1924class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1925{ 1926public: 1927 typedef size_t size_type; 1928 typedef ptrdiff_t difference_type; 1929 typedef const _Tp* pointer; 1930 typedef const _Tp* const_pointer; 1931 typedef const _Tp& reference; 1932 typedef const _Tp& const_reference; 1933 typedef const _Tp value_type; 1934 1935 typedef true_type propagate_on_container_move_assignment; 1936 typedef true_type is_always_equal; 1937 1938 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1939 1940 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1941 allocator() _NOEXCEPT {} 1942 1943 template <class _Up> 1944 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1945 allocator(const allocator<_Up>&) _NOEXCEPT {} 1946 1947 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1948 {return _VSTD::addressof(__x);} 1949 _LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1950 { 1951 if (__n > max_size()) 1952 __throw_length_error("allocator<const T>::allocate(size_t n)" 1953 " 'n' exceeds maximum supported size"); 1954 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1955 } 1956 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT 1957 {_VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1958 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1959 {return size_type(~0) / sizeof(_Tp);} 1960#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1961 template <class _Up, class... _Args> 1962 _LIBCPP_INLINE_VISIBILITY 1963 void 1964 construct(_Up* __p, _Args&&... __args) 1965 { 1966 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1967 } 1968#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1969 _LIBCPP_INLINE_VISIBILITY 1970 void 1971 construct(pointer __p) 1972 { 1973 ::new((void*) const_cast<_Tp *>(__p)) _Tp(); 1974 } 1975# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1976 1977 template <class _A0> 1978 _LIBCPP_INLINE_VISIBILITY 1979 void 1980 construct(pointer __p, _A0& __a0) 1981 { 1982 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1983 } 1984 template <class _A0> 1985 _LIBCPP_INLINE_VISIBILITY 1986 void 1987 construct(pointer __p, const _A0& __a0) 1988 { 1989 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1990 } 1991# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1992 template <class _A0, class _A1> 1993 _LIBCPP_INLINE_VISIBILITY 1994 void 1995 construct(pointer __p, _A0& __a0, _A1& __a1) 1996 { 1997 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1998 } 1999 template <class _A0, class _A1> 2000 _LIBCPP_INLINE_VISIBILITY 2001 void 2002 construct(pointer __p, const _A0& __a0, _A1& __a1) 2003 { 2004 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 2005 } 2006 template <class _A0, class _A1> 2007 _LIBCPP_INLINE_VISIBILITY 2008 void 2009 construct(pointer __p, _A0& __a0, const _A1& __a1) 2010 { 2011 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 2012 } 2013 template <class _A0, class _A1> 2014 _LIBCPP_INLINE_VISIBILITY 2015 void 2016 construct(pointer __p, const _A0& __a0, const _A1& __a1) 2017 { 2018 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 2019 } 2020#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 2021 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 2022}; 2023 2024template <class _Tp, class _Up> 2025inline _LIBCPP_INLINE_VISIBILITY 2026bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 2027 2028template <class _Tp, class _Up> 2029inline _LIBCPP_INLINE_VISIBILITY 2030bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 2031 2032template <class _OutputIterator, class _Tp> 2033class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 2034 : public iterator<output_iterator_tag, 2035 _Tp, // purposefully not C++03 2036 ptrdiff_t, // purposefully not C++03 2037 _Tp*, // purposefully not C++03 2038 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 2039{ 2040private: 2041 _OutputIterator __x_; 2042public: 2043 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 2044 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 2045 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 2046 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 2047#if _LIBCPP_STD_VER >= 14 2048 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 2049 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 2050#endif 2051 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 2052 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 2053 {raw_storage_iterator __t(*this); ++__x_; return __t;} 2054#if _LIBCPP_STD_VER >= 14 2055 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 2056#endif 2057}; 2058 2059template <class _Tp> 2060_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 2061pair<_Tp*, ptrdiff_t> 2062get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 2063{ 2064 pair<_Tp*, ptrdiff_t> __r(0, 0); 2065 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 2066 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 2067 / sizeof(_Tp); 2068 if (__n > __m) 2069 __n = __m; 2070 while (__n > 0) 2071 { 2072#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 2073 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2074 { 2075 std::align_val_t __al = 2076 std::align_val_t(std::alignment_of<_Tp>::value); 2077 __r.first = static_cast<_Tp*>(::operator new( 2078 __n * sizeof(_Tp), __al, nothrow)); 2079 } else { 2080 __r.first = static_cast<_Tp*>(::operator new( 2081 __n * sizeof(_Tp), nothrow)); 2082 } 2083#else 2084 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2085 { 2086 // Since aligned operator new is unavailable, return an empty 2087 // buffer rather than one with invalid alignment. 2088 return __r; 2089 } 2090 2091 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 2092#endif 2093 2094 if (__r.first) 2095 { 2096 __r.second = __n; 2097 break; 2098 } 2099 __n /= 2; 2100 } 2101 return __r; 2102} 2103 2104template <class _Tp> 2105inline _LIBCPP_INLINE_VISIBILITY 2106void return_temporary_buffer(_Tp* __p) _NOEXCEPT 2107{ 2108 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 2109} 2110 2111#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2112template <class _Tp> 2113struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 2114{ 2115 _Tp* __ptr_; 2116}; 2117 2118template<class _Tp> 2119class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 2120{ 2121private: 2122 _Tp* __ptr_; 2123public: 2124 typedef _Tp element_type; 2125 2126 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) throw() : __ptr_(__p) {} 2127 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) throw() : __ptr_(__p.release()) {} 2128 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) throw() 2129 : __ptr_(__p.release()) {} 2130 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) throw() 2131 {reset(__p.release()); return *this;} 2132 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) throw() 2133 {reset(__p.release()); return *this;} 2134 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) throw() 2135 {reset(__p.__ptr_); return *this;} 2136 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() throw() {delete __ptr_;} 2137 2138 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const throw() 2139 {return *__ptr_;} 2140 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const throw() {return __ptr_;} 2141 _LIBCPP_INLINE_VISIBILITY _Tp* get() const throw() {return __ptr_;} 2142 _LIBCPP_INLINE_VISIBILITY _Tp* release() throw() 2143 { 2144 _Tp* __t = __ptr_; 2145 __ptr_ = 0; 2146 return __t; 2147 } 2148 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) throw() 2149 { 2150 if (__ptr_ != __p) 2151 delete __ptr_; 2152 __ptr_ = __p; 2153 } 2154 2155 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) throw() : __ptr_(__p.__ptr_) {} 2156 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() throw() 2157 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 2158 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() throw() 2159 {return auto_ptr<_Up>(release());} 2160}; 2161 2162template <> 2163class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 2164{ 2165public: 2166 typedef void element_type; 2167}; 2168#endif 2169 2170template <class _Tp, int _Idx, 2171 bool _CanBeEmptyBase = 2172 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 2173struct __compressed_pair_elem { 2174 typedef _Tp _ParamT; 2175 typedef _Tp& reference; 2176 typedef const _Tp& const_reference; 2177 2178#ifndef _LIBCPP_CXX03_LANG 2179 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() : __value_() {} 2180 2181 template <class _Up, class = typename enable_if< 2182 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2183 >::type> 2184 _LIBCPP_INLINE_VISIBILITY 2185 constexpr explicit 2186 __compressed_pair_elem(_Up&& __u) 2187 : __value_(_VSTD::forward<_Up>(__u)) 2188 { 2189 } 2190 2191 template <class... _Args, size_t... _Indexes> 2192 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2193 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2194 __tuple_indices<_Indexes...>) 2195 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2196#else 2197 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_() {} 2198 _LIBCPP_INLINE_VISIBILITY 2199 __compressed_pair_elem(_ParamT __p) : __value_(std::forward<_ParamT>(__p)) {} 2200#endif 2201 2202 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 2203 _LIBCPP_INLINE_VISIBILITY 2204 const_reference __get() const _NOEXCEPT { return __value_; } 2205 2206private: 2207 _Tp __value_; 2208}; 2209 2210template <class _Tp, int _Idx> 2211struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2212 typedef _Tp _ParamT; 2213 typedef _Tp& reference; 2214 typedef const _Tp& const_reference; 2215 typedef _Tp __value_type; 2216 2217#ifndef _LIBCPP_CXX03_LANG 2218 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() = default; 2219 2220 template <class _Up, class = typename enable_if< 2221 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2222 >::type> 2223 _LIBCPP_INLINE_VISIBILITY 2224 constexpr explicit 2225 __compressed_pair_elem(_Up&& __u) 2226 : __value_type(_VSTD::forward<_Up>(__u)) 2227 {} 2228 2229 template <class... _Args, size_t... _Indexes> 2230 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2231 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2232 __tuple_indices<_Indexes...>) 2233 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2234#else 2235 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_type() {} 2236 _LIBCPP_INLINE_VISIBILITY 2237 __compressed_pair_elem(_ParamT __p) 2238 : __value_type(std::forward<_ParamT>(__p)) {} 2239#endif 2240 2241 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 2242 _LIBCPP_INLINE_VISIBILITY 2243 const_reference __get() const _NOEXCEPT { return *this; } 2244}; 2245 2246// Tag used to construct the second element of the compressed pair. 2247struct __second_tag {}; 2248 2249template <class _T1, class _T2> 2250class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2251 private __compressed_pair_elem<_T2, 1> { 2252 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 2253 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 2254 2255 // NOTE: This static assert should never fire because __compressed_pair 2256 // is *almost never* used in a scenario where it's possible for T1 == T2. 2257 // (The exception is std::function where it is possible that the function 2258 // object and the allocator have the same type). 2259 static_assert((!is_same<_T1, _T2>::value), 2260 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2261 "The current implementation is NOT ABI-compatible with the previous " 2262 "implementation for this configuration"); 2263 2264public: 2265#ifndef _LIBCPP_CXX03_LANG 2266 template <bool _Dummy = true, 2267 class = typename enable_if< 2268 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2269 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2270 >::type 2271 > 2272 _LIBCPP_INLINE_VISIBILITY 2273 constexpr __compressed_pair() {} 2274 2275 template <class _Tp, typename enable_if<!is_same<typename decay<_Tp>::type, 2276 __compressed_pair>::value, 2277 bool>::type = true> 2278 _LIBCPP_INLINE_VISIBILITY constexpr explicit 2279 __compressed_pair(_Tp&& __t) 2280 : _Base1(std::forward<_Tp>(__t)), _Base2() {} 2281 2282 template <class _Tp> 2283 _LIBCPP_INLINE_VISIBILITY constexpr 2284 __compressed_pair(__second_tag, _Tp&& __t) 2285 : _Base1(), _Base2(std::forward<_Tp>(__t)) {} 2286 2287 template <class _U1, class _U2> 2288 _LIBCPP_INLINE_VISIBILITY constexpr 2289 __compressed_pair(_U1&& __t1, _U2&& __t2) 2290 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2291 2292 template <class... _Args1, class... _Args2> 2293 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2294 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 2295 tuple<_Args2...> __second_args) 2296 : _Base1(__pc, _VSTD::move(__first_args), 2297 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 2298 _Base2(__pc, _VSTD::move(__second_args), 2299 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 2300 2301#else 2302 _LIBCPP_INLINE_VISIBILITY 2303 __compressed_pair() {} 2304 2305 _LIBCPP_INLINE_VISIBILITY explicit 2306 __compressed_pair(_T1 __t1) : _Base1(_VSTD::forward<_T1>(__t1)) {} 2307 2308 _LIBCPP_INLINE_VISIBILITY 2309 __compressed_pair(__second_tag, _T2 __t2) 2310 : _Base1(), _Base2(_VSTD::forward<_T2>(__t2)) {} 2311 2312 _LIBCPP_INLINE_VISIBILITY 2313 __compressed_pair(_T1 __t1, _T2 __t2) 2314 : _Base1(_VSTD::forward<_T1>(__t1)), _Base2(_VSTD::forward<_T2>(__t2)) {} 2315#endif 2316 2317 _LIBCPP_INLINE_VISIBILITY 2318 typename _Base1::reference first() _NOEXCEPT { 2319 return static_cast<_Base1&>(*this).__get(); 2320 } 2321 2322 _LIBCPP_INLINE_VISIBILITY 2323 typename _Base1::const_reference first() const _NOEXCEPT { 2324 return static_cast<_Base1 const&>(*this).__get(); 2325 } 2326 2327 _LIBCPP_INLINE_VISIBILITY 2328 typename _Base2::reference second() _NOEXCEPT { 2329 return static_cast<_Base2&>(*this).__get(); 2330 } 2331 2332 _LIBCPP_INLINE_VISIBILITY 2333 typename _Base2::const_reference second() const _NOEXCEPT { 2334 return static_cast<_Base2 const&>(*this).__get(); 2335 } 2336 2337 _LIBCPP_INLINE_VISIBILITY 2338 void swap(__compressed_pair& __x) 2339 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2340 __is_nothrow_swappable<_T2>::value) 2341 { 2342 using std::swap; 2343 swap(first(), __x.first()); 2344 swap(second(), __x.second()); 2345 } 2346}; 2347 2348template <class _T1, class _T2> 2349inline _LIBCPP_INLINE_VISIBILITY 2350void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2351 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2352 __is_nothrow_swappable<_T2>::value) { 2353 __x.swap(__y); 2354} 2355 2356// default_delete 2357 2358template <class _Tp> 2359struct _LIBCPP_TEMPLATE_VIS default_delete { 2360 static_assert(!is_function<_Tp>::value, 2361 "default_delete cannot be instantiated for function types"); 2362#ifndef _LIBCPP_CXX03_LANG 2363 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2364#else 2365 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2366#endif 2367 template <class _Up> 2368 _LIBCPP_INLINE_VISIBILITY 2369 default_delete(const default_delete<_Up>&, 2370 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2371 0) _NOEXCEPT {} 2372 2373 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2374 static_assert(sizeof(_Tp) > 0, 2375 "default_delete can not delete incomplete type"); 2376 static_assert(!is_void<_Tp>::value, 2377 "default_delete can not delete incomplete type"); 2378 delete __ptr; 2379 } 2380}; 2381 2382template <class _Tp> 2383struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2384private: 2385 template <class _Up> 2386 struct _EnableIfConvertible 2387 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2388 2389public: 2390#ifndef _LIBCPP_CXX03_LANG 2391 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2392#else 2393 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2394#endif 2395 2396 template <class _Up> 2397 _LIBCPP_INLINE_VISIBILITY 2398 default_delete(const default_delete<_Up[]>&, 2399 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2400 2401 template <class _Up> 2402 _LIBCPP_INLINE_VISIBILITY 2403 typename _EnableIfConvertible<_Up>::type 2404 operator()(_Up* __ptr) const _NOEXCEPT { 2405 static_assert(sizeof(_Tp) > 0, 2406 "default_delete can not delete incomplete type"); 2407 static_assert(!is_void<_Tp>::value, 2408 "default_delete can not delete void type"); 2409 delete[] __ptr; 2410 } 2411}; 2412 2413template <class _Deleter> 2414struct __unique_ptr_deleter_sfinae { 2415 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2416 typedef const _Deleter& __lval_ref_type; 2417 typedef _Deleter&& __good_rval_ref_type; 2418 typedef true_type __enable_rval_overload; 2419}; 2420 2421template <class _Deleter> 2422struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2423 typedef const _Deleter& __lval_ref_type; 2424 typedef const _Deleter&& __bad_rval_ref_type; 2425 typedef false_type __enable_rval_overload; 2426}; 2427 2428template <class _Deleter> 2429struct __unique_ptr_deleter_sfinae<_Deleter&> { 2430 typedef _Deleter& __lval_ref_type; 2431 typedef _Deleter&& __bad_rval_ref_type; 2432 typedef false_type __enable_rval_overload; 2433}; 2434 2435template <class _Tp, class _Dp = default_delete<_Tp> > 2436class _LIBCPP_TEMPLATE_VIS unique_ptr { 2437public: 2438 typedef _Tp element_type; 2439 typedef _Dp deleter_type; 2440 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type<_Tp, deleter_type>::type pointer; 2441 2442 static_assert(!is_rvalue_reference<deleter_type>::value, 2443 "the specified deleter type cannot be an rvalue reference"); 2444 2445private: 2446 __compressed_pair<pointer, deleter_type> __ptr_; 2447 2448 struct __nat { int __for_bool_; }; 2449 2450 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2451 2452 template <bool _Dummy> 2453 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2454 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2455 2456 template <bool _Dummy> 2457 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2458 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2459 2460 template <bool _Dummy> 2461 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2462 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2463 2464 template <bool _Dummy, class _Deleter = typename __dependent_type< 2465 __identity<deleter_type>, _Dummy>::type> 2466 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2467 typename enable_if<is_default_constructible<_Deleter>::value && 2468 !is_pointer<_Deleter>::value>::type; 2469 2470 template <class _ArgType> 2471 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2472 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2473 2474 template <class _UPtr, class _Up> 2475 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2476 is_convertible<typename _UPtr::pointer, pointer>::value && 2477 !is_array<_Up>::value 2478 >::type; 2479 2480 template <class _UDel> 2481 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2482 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2483 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2484 >::type; 2485 2486 template <class _UDel> 2487 using _EnableIfDeleterAssignable = typename enable_if< 2488 is_assignable<_Dp&, _UDel&&>::value 2489 >::type; 2490 2491public: 2492 template <bool _Dummy = true, 2493 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2494 _LIBCPP_INLINE_VISIBILITY 2495 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer()) {} 2496 2497 template <bool _Dummy = true, 2498 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2499 _LIBCPP_INLINE_VISIBILITY 2500 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer()) {} 2501 2502 template <bool _Dummy = true, 2503 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2504 _LIBCPP_INLINE_VISIBILITY 2505 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p) {} 2506 2507 template <bool _Dummy = true, 2508 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2509 _LIBCPP_INLINE_VISIBILITY 2510 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2511 : __ptr_(__p, __d) {} 2512 2513 template <bool _Dummy = true, 2514 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2515 _LIBCPP_INLINE_VISIBILITY 2516 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2517 : __ptr_(__p, _VSTD::move(__d)) { 2518 static_assert(!is_reference<deleter_type>::value, 2519 "rvalue deleter bound to reference"); 2520 } 2521 2522 template <bool _Dummy = true, 2523 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 2524 _LIBCPP_INLINE_VISIBILITY 2525 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2526 2527 _LIBCPP_INLINE_VISIBILITY 2528 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2529 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2530 } 2531 2532 template <class _Up, class _Ep, 2533 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2534 class = _EnableIfDeleterConvertible<_Ep> 2535 > 2536 _LIBCPP_INLINE_VISIBILITY 2537 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2538 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2539 2540#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2541 template <class _Up> 2542 _LIBCPP_INLINE_VISIBILITY 2543 unique_ptr(auto_ptr<_Up>&& __p, 2544 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2545 is_same<_Dp, default_delete<_Tp> >::value, 2546 __nat>::type = __nat()) _NOEXCEPT 2547 : __ptr_(__p.release()) {} 2548#endif 2549 2550 _LIBCPP_INLINE_VISIBILITY 2551 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2552 reset(__u.release()); 2553 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2554 return *this; 2555 } 2556 2557 template <class _Up, class _Ep, 2558 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2559 class = _EnableIfDeleterAssignable<_Ep> 2560 > 2561 _LIBCPP_INLINE_VISIBILITY 2562 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2563 reset(__u.release()); 2564 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2565 return *this; 2566 } 2567 2568#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2569 template <class _Up> 2570 _LIBCPP_INLINE_VISIBILITY 2571 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2572 is_same<_Dp, default_delete<_Tp> >::value, 2573 unique_ptr&>::type 2574 operator=(auto_ptr<_Up> __p) { 2575 reset(__p.release()); 2576 return *this; 2577 } 2578#endif 2579 2580#ifdef _LIBCPP_CXX03_LANG 2581 unique_ptr(unique_ptr const&) = delete; 2582 unique_ptr& operator=(unique_ptr const&) = delete; 2583#endif 2584 2585 2586 _LIBCPP_INLINE_VISIBILITY 2587 ~unique_ptr() { reset(); } 2588 2589 _LIBCPP_INLINE_VISIBILITY 2590 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2591 reset(); 2592 return *this; 2593 } 2594 2595 _LIBCPP_INLINE_VISIBILITY 2596 typename add_lvalue_reference<_Tp>::type 2597 operator*() const { 2598 return *__ptr_.first(); 2599 } 2600 _LIBCPP_INLINE_VISIBILITY 2601 pointer operator->() const _NOEXCEPT { 2602 return __ptr_.first(); 2603 } 2604 _LIBCPP_INLINE_VISIBILITY 2605 pointer get() const _NOEXCEPT { 2606 return __ptr_.first(); 2607 } 2608 _LIBCPP_INLINE_VISIBILITY 2609 deleter_type& get_deleter() _NOEXCEPT { 2610 return __ptr_.second(); 2611 } 2612 _LIBCPP_INLINE_VISIBILITY 2613 const deleter_type& get_deleter() const _NOEXCEPT { 2614 return __ptr_.second(); 2615 } 2616 _LIBCPP_INLINE_VISIBILITY 2617 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2618 return __ptr_.first() != nullptr; 2619 } 2620 2621 _LIBCPP_INLINE_VISIBILITY 2622 pointer release() _NOEXCEPT { 2623 pointer __t = __ptr_.first(); 2624 __ptr_.first() = pointer(); 2625 return __t; 2626 } 2627 2628 _LIBCPP_INLINE_VISIBILITY 2629 void reset(pointer __p = pointer()) _NOEXCEPT { 2630 pointer __tmp = __ptr_.first(); 2631 __ptr_.first() = __p; 2632 if (__tmp) 2633 __ptr_.second()(__tmp); 2634 } 2635 2636 _LIBCPP_INLINE_VISIBILITY 2637 void swap(unique_ptr& __u) _NOEXCEPT { 2638 __ptr_.swap(__u.__ptr_); 2639 } 2640}; 2641 2642 2643template <class _Tp, class _Dp> 2644class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2645public: 2646 typedef _Tp element_type; 2647 typedef _Dp deleter_type; 2648 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2649 2650private: 2651 __compressed_pair<pointer, deleter_type> __ptr_; 2652 2653 template <class _From> 2654 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2655 2656 template <class _FromElem> 2657 struct _CheckArrayPointerConversion<_FromElem*> 2658 : integral_constant<bool, 2659 is_same<_FromElem*, pointer>::value || 2660 (is_same<pointer, element_type*>::value && 2661 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2662 > 2663 {}; 2664 2665 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2666 2667 template <bool _Dummy> 2668 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2669 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2670 2671 template <bool _Dummy> 2672 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2673 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2674 2675 template <bool _Dummy> 2676 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2677 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2678 2679 template <bool _Dummy, class _Deleter = typename __dependent_type< 2680 __identity<deleter_type>, _Dummy>::type> 2681 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2682 typename enable_if<is_default_constructible<_Deleter>::value && 2683 !is_pointer<_Deleter>::value>::type; 2684 2685 template <class _ArgType> 2686 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2687 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2688 2689 template <class _Pp> 2690 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2691 _CheckArrayPointerConversion<_Pp>::value 2692 >::type; 2693 2694 template <class _UPtr, class _Up, 2695 class _ElemT = typename _UPtr::element_type> 2696 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2697 is_array<_Up>::value && 2698 is_same<pointer, element_type*>::value && 2699 is_same<typename _UPtr::pointer, _ElemT*>::value && 2700 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2701 >::type; 2702 2703 template <class _UDel> 2704 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2705 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2706 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2707 >::type; 2708 2709 template <class _UDel> 2710 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 2711 is_assignable<_Dp&, _UDel&&>::value 2712 >::type; 2713 2714public: 2715 template <bool _Dummy = true, 2716 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2717 _LIBCPP_INLINE_VISIBILITY 2718 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer()) {} 2719 2720 template <bool _Dummy = true, 2721 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2722 _LIBCPP_INLINE_VISIBILITY 2723 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer()) {} 2724 2725 template <class _Pp, bool _Dummy = true, 2726 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2727 class = _EnableIfPointerConvertible<_Pp> > 2728 _LIBCPP_INLINE_VISIBILITY 2729 explicit unique_ptr(_Pp __p) _NOEXCEPT 2730 : __ptr_(__p) {} 2731 2732 template <class _Pp, bool _Dummy = true, 2733 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 2734 class = _EnableIfPointerConvertible<_Pp> > 2735 _LIBCPP_INLINE_VISIBILITY 2736 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2737 : __ptr_(__p, __d) {} 2738 2739 template <bool _Dummy = true, 2740 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2741 _LIBCPP_INLINE_VISIBILITY 2742 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 2743 : __ptr_(nullptr, __d) {} 2744 2745 template <class _Pp, bool _Dummy = true, 2746 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 2747 class = _EnableIfPointerConvertible<_Pp> > 2748 _LIBCPP_INLINE_VISIBILITY 2749 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2750 : __ptr_(__p, _VSTD::move(__d)) { 2751 static_assert(!is_reference<deleter_type>::value, 2752 "rvalue deleter bound to reference"); 2753 } 2754 2755 template <bool _Dummy = true, 2756 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2757 _LIBCPP_INLINE_VISIBILITY 2758 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2759 : __ptr_(nullptr, _VSTD::move(__d)) { 2760 static_assert(!is_reference<deleter_type>::value, 2761 "rvalue deleter bound to reference"); 2762 } 2763 2764 template <class _Pp, bool _Dummy = true, 2765 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 2766 class = _EnableIfPointerConvertible<_Pp> > 2767 _LIBCPP_INLINE_VISIBILITY 2768 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2769 2770 _LIBCPP_INLINE_VISIBILITY 2771 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2772 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2773 } 2774 2775 _LIBCPP_INLINE_VISIBILITY 2776 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2777 reset(__u.release()); 2778 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2779 return *this; 2780 } 2781 2782 template <class _Up, class _Ep, 2783 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2784 class = _EnableIfDeleterConvertible<_Ep> 2785 > 2786 _LIBCPP_INLINE_VISIBILITY 2787 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2788 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2789 } 2790 2791 template <class _Up, class _Ep, 2792 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2793 class = _EnableIfDeleterAssignable<_Ep> 2794 > 2795 _LIBCPP_INLINE_VISIBILITY 2796 unique_ptr& 2797 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2798 reset(__u.release()); 2799 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2800 return *this; 2801 } 2802 2803#ifdef _LIBCPP_CXX03_LANG 2804 unique_ptr(unique_ptr const&) = delete; 2805 unique_ptr& operator=(unique_ptr const&) = delete; 2806#endif 2807 2808public: 2809 _LIBCPP_INLINE_VISIBILITY 2810 ~unique_ptr() { reset(); } 2811 2812 _LIBCPP_INLINE_VISIBILITY 2813 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2814 reset(); 2815 return *this; 2816 } 2817 2818 _LIBCPP_INLINE_VISIBILITY 2819 typename add_lvalue_reference<_Tp>::type 2820 operator[](size_t __i) const { 2821 return __ptr_.first()[__i]; 2822 } 2823 _LIBCPP_INLINE_VISIBILITY 2824 pointer get() const _NOEXCEPT { 2825 return __ptr_.first(); 2826 } 2827 2828 _LIBCPP_INLINE_VISIBILITY 2829 deleter_type& get_deleter() _NOEXCEPT { 2830 return __ptr_.second(); 2831 } 2832 2833 _LIBCPP_INLINE_VISIBILITY 2834 const deleter_type& get_deleter() const _NOEXCEPT { 2835 return __ptr_.second(); 2836 } 2837 _LIBCPP_INLINE_VISIBILITY 2838 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2839 return __ptr_.first() != nullptr; 2840 } 2841 2842 _LIBCPP_INLINE_VISIBILITY 2843 pointer release() _NOEXCEPT { 2844 pointer __t = __ptr_.first(); 2845 __ptr_.first() = pointer(); 2846 return __t; 2847 } 2848 2849 template <class _Pp> 2850 _LIBCPP_INLINE_VISIBILITY 2851 typename enable_if< 2852 _CheckArrayPointerConversion<_Pp>::value 2853 >::type 2854 reset(_Pp __p) _NOEXCEPT { 2855 pointer __tmp = __ptr_.first(); 2856 __ptr_.first() = __p; 2857 if (__tmp) 2858 __ptr_.second()(__tmp); 2859 } 2860 2861 _LIBCPP_INLINE_VISIBILITY 2862 void reset(nullptr_t = nullptr) _NOEXCEPT { 2863 pointer __tmp = __ptr_.first(); 2864 __ptr_.first() = nullptr; 2865 if (__tmp) 2866 __ptr_.second()(__tmp); 2867 } 2868 2869 _LIBCPP_INLINE_VISIBILITY 2870 void swap(unique_ptr& __u) _NOEXCEPT { 2871 __ptr_.swap(__u.__ptr_); 2872 } 2873 2874}; 2875 2876template <class _Tp, class _Dp> 2877inline _LIBCPP_INLINE_VISIBILITY 2878typename enable_if< 2879 __is_swappable<_Dp>::value, 2880 void 2881>::type 2882swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2883 2884template <class _T1, class _D1, class _T2, class _D2> 2885inline _LIBCPP_INLINE_VISIBILITY 2886bool 2887operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2888 2889template <class _T1, class _D1, class _T2, class _D2> 2890inline _LIBCPP_INLINE_VISIBILITY 2891bool 2892operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2893 2894template <class _T1, class _D1, class _T2, class _D2> 2895inline _LIBCPP_INLINE_VISIBILITY 2896bool 2897operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2898{ 2899 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2900 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2901 typedef typename common_type<_P1, _P2>::type _Vp; 2902 return less<_Vp>()(__x.get(), __y.get()); 2903} 2904 2905template <class _T1, class _D1, class _T2, class _D2> 2906inline _LIBCPP_INLINE_VISIBILITY 2907bool 2908operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2909 2910template <class _T1, class _D1, class _T2, class _D2> 2911inline _LIBCPP_INLINE_VISIBILITY 2912bool 2913operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2914 2915template <class _T1, class _D1, class _T2, class _D2> 2916inline _LIBCPP_INLINE_VISIBILITY 2917bool 2918operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2919 2920template <class _T1, class _D1> 2921inline _LIBCPP_INLINE_VISIBILITY 2922bool 2923operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2924{ 2925 return !__x; 2926} 2927 2928template <class _T1, class _D1> 2929inline _LIBCPP_INLINE_VISIBILITY 2930bool 2931operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2932{ 2933 return !__x; 2934} 2935 2936template <class _T1, class _D1> 2937inline _LIBCPP_INLINE_VISIBILITY 2938bool 2939operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2940{ 2941 return static_cast<bool>(__x); 2942} 2943 2944template <class _T1, class _D1> 2945inline _LIBCPP_INLINE_VISIBILITY 2946bool 2947operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2948{ 2949 return static_cast<bool>(__x); 2950} 2951 2952template <class _T1, class _D1> 2953inline _LIBCPP_INLINE_VISIBILITY 2954bool 2955operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2956{ 2957 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2958 return less<_P1>()(__x.get(), nullptr); 2959} 2960 2961template <class _T1, class _D1> 2962inline _LIBCPP_INLINE_VISIBILITY 2963bool 2964operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2965{ 2966 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2967 return less<_P1>()(nullptr, __x.get()); 2968} 2969 2970template <class _T1, class _D1> 2971inline _LIBCPP_INLINE_VISIBILITY 2972bool 2973operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2974{ 2975 return nullptr < __x; 2976} 2977 2978template <class _T1, class _D1> 2979inline _LIBCPP_INLINE_VISIBILITY 2980bool 2981operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2982{ 2983 return __x < nullptr; 2984} 2985 2986template <class _T1, class _D1> 2987inline _LIBCPP_INLINE_VISIBILITY 2988bool 2989operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2990{ 2991 return !(nullptr < __x); 2992} 2993 2994template <class _T1, class _D1> 2995inline _LIBCPP_INLINE_VISIBILITY 2996bool 2997operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2998{ 2999 return !(__x < nullptr); 3000} 3001 3002template <class _T1, class _D1> 3003inline _LIBCPP_INLINE_VISIBILITY 3004bool 3005operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3006{ 3007 return !(__x < nullptr); 3008} 3009 3010template <class _T1, class _D1> 3011inline _LIBCPP_INLINE_VISIBILITY 3012bool 3013operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3014{ 3015 return !(nullptr < __x); 3016} 3017 3018#if _LIBCPP_STD_VER > 11 3019 3020template<class _Tp> 3021struct __unique_if 3022{ 3023 typedef unique_ptr<_Tp> __unique_single; 3024}; 3025 3026template<class _Tp> 3027struct __unique_if<_Tp[]> 3028{ 3029 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 3030}; 3031 3032template<class _Tp, size_t _Np> 3033struct __unique_if<_Tp[_Np]> 3034{ 3035 typedef void __unique_array_known_bound; 3036}; 3037 3038template<class _Tp, class... _Args> 3039inline _LIBCPP_INLINE_VISIBILITY 3040typename __unique_if<_Tp>::__unique_single 3041make_unique(_Args&&... __args) 3042{ 3043 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 3044} 3045 3046template<class _Tp> 3047inline _LIBCPP_INLINE_VISIBILITY 3048typename __unique_if<_Tp>::__unique_array_unknown_bound 3049make_unique(size_t __n) 3050{ 3051 typedef typename remove_extent<_Tp>::type _Up; 3052 return unique_ptr<_Tp>(new _Up[__n]()); 3053} 3054 3055template<class _Tp, class... _Args> 3056 typename __unique_if<_Tp>::__unique_array_known_bound 3057 make_unique(_Args&&...) = delete; 3058 3059#endif // _LIBCPP_STD_VER > 11 3060 3061template <class _Tp, class _Dp> 3062#ifdef _LIBCPP_CXX03_LANG 3063struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 3064#else 3065struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 3066 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 3067#endif 3068{ 3069 typedef unique_ptr<_Tp, _Dp> argument_type; 3070 typedef size_t result_type; 3071 _LIBCPP_INLINE_VISIBILITY 3072 result_type operator()(const argument_type& __ptr) const 3073 { 3074 typedef typename argument_type::pointer pointer; 3075 return hash<pointer>()(__ptr.get()); 3076 } 3077}; 3078 3079struct __destruct_n 3080{ 3081private: 3082 size_t __size_; 3083 3084 template <class _Tp> 3085 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 3086 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 3087 3088 template <class _Tp> 3089 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 3090 {} 3091 3092 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 3093 {++__size_;} 3094 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 3095 {} 3096 3097 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 3098 {__size_ = __s;} 3099 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 3100 {} 3101public: 3102 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 3103 : __size_(__s) {} 3104 3105 template <class _Tp> 3106 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 3107 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3108 3109 template <class _Tp> 3110 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 3111 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3112 3113 template <class _Tp> 3114 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 3115 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3116}; 3117 3118template <class _Alloc> 3119class __allocator_destructor 3120{ 3121 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 3122public: 3123 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 3124 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 3125private: 3126 _Alloc& __alloc_; 3127 size_type __s_; 3128public: 3129 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3130 _NOEXCEPT 3131 : __alloc_(__a), __s_(__s) {} 3132 _LIBCPP_INLINE_VISIBILITY 3133 void operator()(pointer __p) _NOEXCEPT 3134 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3135}; 3136 3137template <class _InputIterator, class _ForwardIterator> 3138_ForwardIterator 3139uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3140{ 3141 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3142#ifndef _LIBCPP_NO_EXCEPTIONS 3143 _ForwardIterator __s = __r; 3144 try 3145 { 3146#endif 3147 for (; __f != __l; ++__f, (void) ++__r) 3148 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3149#ifndef _LIBCPP_NO_EXCEPTIONS 3150 } 3151 catch (...) 3152 { 3153 for (; __s != __r; ++__s) 3154 __s->~value_type(); 3155 throw; 3156 } 3157#endif 3158 return __r; 3159} 3160 3161template <class _InputIterator, class _Size, class _ForwardIterator> 3162_ForwardIterator 3163uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3164{ 3165 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3166#ifndef _LIBCPP_NO_EXCEPTIONS 3167 _ForwardIterator __s = __r; 3168 try 3169 { 3170#endif 3171 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3172 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3173#ifndef _LIBCPP_NO_EXCEPTIONS 3174 } 3175 catch (...) 3176 { 3177 for (; __s != __r; ++__s) 3178 __s->~value_type(); 3179 throw; 3180 } 3181#endif 3182 return __r; 3183} 3184 3185template <class _ForwardIterator, class _Tp> 3186void 3187uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3188{ 3189 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3190#ifndef _LIBCPP_NO_EXCEPTIONS 3191 _ForwardIterator __s = __f; 3192 try 3193 { 3194#endif 3195 for (; __f != __l; ++__f) 3196 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3197#ifndef _LIBCPP_NO_EXCEPTIONS 3198 } 3199 catch (...) 3200 { 3201 for (; __s != __f; ++__s) 3202 __s->~value_type(); 3203 throw; 3204 } 3205#endif 3206} 3207 3208template <class _ForwardIterator, class _Size, class _Tp> 3209_ForwardIterator 3210uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3211{ 3212 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3213#ifndef _LIBCPP_NO_EXCEPTIONS 3214 _ForwardIterator __s = __f; 3215 try 3216 { 3217#endif 3218 for (; __n > 0; ++__f, (void) --__n) 3219 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3220#ifndef _LIBCPP_NO_EXCEPTIONS 3221 } 3222 catch (...) 3223 { 3224 for (; __s != __f; ++__s) 3225 __s->~value_type(); 3226 throw; 3227 } 3228#endif 3229 return __f; 3230} 3231 3232#if _LIBCPP_STD_VER > 14 3233 3234template <class _Tp> 3235inline _LIBCPP_INLINE_VISIBILITY 3236void destroy_at(_Tp* __loc) { 3237 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3238 __loc->~_Tp(); 3239} 3240 3241template <class _ForwardIterator> 3242inline _LIBCPP_INLINE_VISIBILITY 3243void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3244 for (; __first != __last; ++__first) 3245 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3246} 3247 3248template <class _ForwardIterator, class _Size> 3249inline _LIBCPP_INLINE_VISIBILITY 3250_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3251 for (; __n > 0; (void)++__first, --__n) 3252 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3253 return __first; 3254} 3255 3256template <class _ForwardIterator> 3257inline _LIBCPP_INLINE_VISIBILITY 3258void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3259 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3260 auto __idx = __first; 3261#ifndef _LIBCPP_NO_EXCEPTIONS 3262 try { 3263#endif 3264 for (; __idx != __last; ++__idx) 3265 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3266#ifndef _LIBCPP_NO_EXCEPTIONS 3267 } catch (...) { 3268 _VSTD::destroy(__first, __idx); 3269 throw; 3270 } 3271#endif 3272} 3273 3274template <class _ForwardIterator, class _Size> 3275inline _LIBCPP_INLINE_VISIBILITY 3276_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3277 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3278 auto __idx = __first; 3279#ifndef _LIBCPP_NO_EXCEPTIONS 3280 try { 3281#endif 3282 for (; __n > 0; (void)++__idx, --__n) 3283 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3284 return __idx; 3285#ifndef _LIBCPP_NO_EXCEPTIONS 3286 } catch (...) { 3287 _VSTD::destroy(__first, __idx); 3288 throw; 3289 } 3290#endif 3291} 3292 3293 3294template <class _ForwardIterator> 3295inline _LIBCPP_INLINE_VISIBILITY 3296void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3297 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3298 auto __idx = __first; 3299#ifndef _LIBCPP_NO_EXCEPTIONS 3300 try { 3301#endif 3302 for (; __idx != __last; ++__idx) 3303 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3304#ifndef _LIBCPP_NO_EXCEPTIONS 3305 } catch (...) { 3306 _VSTD::destroy(__first, __idx); 3307 throw; 3308 } 3309#endif 3310} 3311 3312template <class _ForwardIterator, class _Size> 3313inline _LIBCPP_INLINE_VISIBILITY 3314_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3315 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3316 auto __idx = __first; 3317#ifndef _LIBCPP_NO_EXCEPTIONS 3318 try { 3319#endif 3320 for (; __n > 0; (void)++__idx, --__n) 3321 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3322 return __idx; 3323#ifndef _LIBCPP_NO_EXCEPTIONS 3324 } catch (...) { 3325 _VSTD::destroy(__first, __idx); 3326 throw; 3327 } 3328#endif 3329} 3330 3331 3332template <class _InputIt, class _ForwardIt> 3333inline _LIBCPP_INLINE_VISIBILITY 3334_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3335 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3336 auto __idx = __first_res; 3337#ifndef _LIBCPP_NO_EXCEPTIONS 3338 try { 3339#endif 3340 for (; __first != __last; (void)++__idx, ++__first) 3341 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3342 return __idx; 3343#ifndef _LIBCPP_NO_EXCEPTIONS 3344 } catch (...) { 3345 _VSTD::destroy(__first_res, __idx); 3346 throw; 3347 } 3348#endif 3349} 3350 3351template <class _InputIt, class _Size, class _ForwardIt> 3352inline _LIBCPP_INLINE_VISIBILITY 3353pair<_InputIt, _ForwardIt> 3354uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3355 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3356 auto __idx = __first_res; 3357#ifndef _LIBCPP_NO_EXCEPTIONS 3358 try { 3359#endif 3360 for (; __n > 0; ++__idx, (void)++__first, --__n) 3361 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3362 return {__first, __idx}; 3363#ifndef _LIBCPP_NO_EXCEPTIONS 3364 } catch (...) { 3365 _VSTD::destroy(__first_res, __idx); 3366 throw; 3367 } 3368#endif 3369} 3370 3371 3372#endif // _LIBCPP_STD_VER > 14 3373 3374// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3375// should be sufficient for thread safety. 3376// See https://bugs.llvm.org/show_bug.cgi?id=22803 3377#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3378 && defined(__ATOMIC_RELAXED) \ 3379 && defined(__ATOMIC_ACQ_REL) 3380# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3381#elif defined(_LIBCPP_COMPILER_GCC) 3382# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3383#endif 3384 3385template <class _Tp> 3386inline _LIBCPP_INLINE_VISIBILITY _Tp 3387__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3388{ 3389#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3390 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3391#else 3392 return __t += 1; 3393#endif 3394} 3395 3396template <class _Tp> 3397inline _LIBCPP_INLINE_VISIBILITY _Tp 3398__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3399{ 3400#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3401 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3402#else 3403 return __t -= 1; 3404#endif 3405} 3406 3407class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3408 : public std::exception 3409{ 3410public: 3411 virtual ~bad_weak_ptr() _NOEXCEPT; 3412 virtual const char* what() const _NOEXCEPT; 3413}; 3414 3415_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 3416void __throw_bad_weak_ptr() 3417{ 3418#ifndef _LIBCPP_NO_EXCEPTIONS 3419 throw bad_weak_ptr(); 3420#else 3421 _VSTD::abort(); 3422#endif 3423} 3424 3425template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3426 3427class _LIBCPP_TYPE_VIS __shared_count 3428{ 3429 __shared_count(const __shared_count&); 3430 __shared_count& operator=(const __shared_count&); 3431 3432protected: 3433 long __shared_owners_; 3434 virtual ~__shared_count(); 3435private: 3436 virtual void __on_zero_shared() _NOEXCEPT = 0; 3437 3438public: 3439 _LIBCPP_INLINE_VISIBILITY 3440 explicit __shared_count(long __refs = 0) _NOEXCEPT 3441 : __shared_owners_(__refs) {} 3442 3443#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3444 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3445 void __add_shared() _NOEXCEPT; 3446 bool __release_shared() _NOEXCEPT; 3447#else 3448 _LIBCPP_INLINE_VISIBILITY 3449 void __add_shared() _NOEXCEPT { 3450 __libcpp_atomic_refcount_increment(__shared_owners_); 3451 } 3452 _LIBCPP_INLINE_VISIBILITY 3453 bool __release_shared() _NOEXCEPT { 3454 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3455 __on_zero_shared(); 3456 return true; 3457 } 3458 return false; 3459 } 3460#endif 3461 _LIBCPP_INLINE_VISIBILITY 3462 long use_count() const _NOEXCEPT { 3463 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3464 } 3465}; 3466 3467class _LIBCPP_TYPE_VIS __shared_weak_count 3468 : private __shared_count 3469{ 3470 long __shared_weak_owners_; 3471 3472public: 3473 _LIBCPP_INLINE_VISIBILITY 3474 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3475 : __shared_count(__refs), 3476 __shared_weak_owners_(__refs) {} 3477protected: 3478 virtual ~__shared_weak_count(); 3479 3480public: 3481#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3482 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3483 void __add_shared() _NOEXCEPT; 3484 void __add_weak() _NOEXCEPT; 3485 void __release_shared() _NOEXCEPT; 3486#else 3487 _LIBCPP_INLINE_VISIBILITY 3488 void __add_shared() _NOEXCEPT { 3489 __shared_count::__add_shared(); 3490 } 3491 _LIBCPP_INLINE_VISIBILITY 3492 void __add_weak() _NOEXCEPT { 3493 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3494 } 3495 _LIBCPP_INLINE_VISIBILITY 3496 void __release_shared() _NOEXCEPT { 3497 if (__shared_count::__release_shared()) 3498 __release_weak(); 3499 } 3500#endif 3501 void __release_weak() _NOEXCEPT; 3502 _LIBCPP_INLINE_VISIBILITY 3503 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3504 __shared_weak_count* lock() _NOEXCEPT; 3505 3506 // Define the function out only if we build static libc++ without RTTI. 3507 // Otherwise we may break clients who need to compile their projects with 3508 // -fno-rtti and yet link against a libc++.dylib compiled 3509 // without -fno-rtti. 3510#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3511 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3512#endif 3513private: 3514 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3515}; 3516 3517template <class _Tp, class _Dp, class _Alloc> 3518class __shared_ptr_pointer 3519 : public __shared_weak_count 3520{ 3521 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3522public: 3523 _LIBCPP_INLINE_VISIBILITY 3524 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3525 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3526 3527#ifndef _LIBCPP_NO_RTTI 3528 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3529#endif 3530 3531private: 3532 virtual void __on_zero_shared() _NOEXCEPT; 3533 virtual void __on_zero_shared_weak() _NOEXCEPT; 3534}; 3535 3536#ifndef _LIBCPP_NO_RTTI 3537 3538template <class _Tp, class _Dp, class _Alloc> 3539const void* 3540__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3541{ 3542 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3543} 3544 3545#endif // _LIBCPP_NO_RTTI 3546 3547template <class _Tp, class _Dp, class _Alloc> 3548void 3549__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3550{ 3551 __data_.first().second()(__data_.first().first()); 3552 __data_.first().second().~_Dp(); 3553} 3554 3555template <class _Tp, class _Dp, class _Alloc> 3556void 3557__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3558{ 3559 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3560 typedef allocator_traits<_Al> _ATraits; 3561 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3562 3563 _Al __a(__data_.second()); 3564 __data_.second().~_Alloc(); 3565 __a.deallocate(_PTraits::pointer_to(*this), 1); 3566} 3567 3568template <class _Tp, class _Alloc> 3569class __shared_ptr_emplace 3570 : public __shared_weak_count 3571{ 3572 __compressed_pair<_Alloc, _Tp> __data_; 3573public: 3574#ifndef _LIBCPP_HAS_NO_VARIADICS 3575 3576 _LIBCPP_INLINE_VISIBILITY 3577 __shared_ptr_emplace(_Alloc __a) 3578 : __data_(_VSTD::move(__a)) {} 3579 3580 template <class ..._Args> 3581 _LIBCPP_INLINE_VISIBILITY 3582 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3583 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3584 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3585 3586#else // _LIBCPP_HAS_NO_VARIADICS 3587 3588 _LIBCPP_INLINE_VISIBILITY 3589 __shared_ptr_emplace(_Alloc __a) 3590 : __data_(__a) {} 3591 3592 template <class _A0> 3593 _LIBCPP_INLINE_VISIBILITY 3594 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3595 : __data_(__a, _Tp(__a0)) {} 3596 3597 template <class _A0, class _A1> 3598 _LIBCPP_INLINE_VISIBILITY 3599 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3600 : __data_(__a, _Tp(__a0, __a1)) {} 3601 3602 template <class _A0, class _A1, class _A2> 3603 _LIBCPP_INLINE_VISIBILITY 3604 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3605 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3606 3607#endif // _LIBCPP_HAS_NO_VARIADICS 3608 3609private: 3610 virtual void __on_zero_shared() _NOEXCEPT; 3611 virtual void __on_zero_shared_weak() _NOEXCEPT; 3612public: 3613 _LIBCPP_INLINE_VISIBILITY 3614 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());} 3615}; 3616 3617template <class _Tp, class _Alloc> 3618void 3619__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3620{ 3621 __data_.second().~_Tp(); 3622} 3623 3624template <class _Tp, class _Alloc> 3625void 3626__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3627{ 3628 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3629 typedef allocator_traits<_Al> _ATraits; 3630 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3631 _Al __a(__data_.first()); 3632 __data_.first().~_Alloc(); 3633 __a.deallocate(_PTraits::pointer_to(*this), 1); 3634} 3635 3636struct __shared_ptr_dummy_rebind_allocator_type; 3637template <> 3638class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3639{ 3640public: 3641 template <class _Other> 3642 struct rebind 3643 { 3644 typedef allocator<_Other> other; 3645 }; 3646}; 3647 3648template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3649 3650template<class _Tp> 3651class _LIBCPP_TEMPLATE_VIS shared_ptr 3652{ 3653public: 3654 typedef _Tp element_type; 3655 3656#if _LIBCPP_STD_VER > 14 3657 typedef weak_ptr<_Tp> weak_type; 3658#endif 3659private: 3660 element_type* __ptr_; 3661 __shared_weak_count* __cntrl_; 3662 3663 struct __nat {int __for_bool_;}; 3664public: 3665 _LIBCPP_INLINE_VISIBILITY 3666 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3667 _LIBCPP_INLINE_VISIBILITY 3668 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3669 template<class _Yp> 3670 explicit shared_ptr(_Yp* __p, 3671 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3672 template<class _Yp, class _Dp> 3673 shared_ptr(_Yp* __p, _Dp __d, 3674 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3675 template<class _Yp, class _Dp, class _Alloc> 3676 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3677 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3678 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3679 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3680 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3681 _LIBCPP_INLINE_VISIBILITY 3682 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3683 template<class _Yp> 3684 _LIBCPP_INLINE_VISIBILITY 3685 shared_ptr(const shared_ptr<_Yp>& __r, 3686 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3687 _NOEXCEPT; 3688#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3689 _LIBCPP_INLINE_VISIBILITY 3690 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3691 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3692 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3693 _NOEXCEPT; 3694#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3695 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3696 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3697#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3698#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3699 template<class _Yp> 3700 shared_ptr(auto_ptr<_Yp>&& __r, 3701 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3702#else 3703 template<class _Yp> 3704 shared_ptr(auto_ptr<_Yp> __r, 3705 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3706#endif 3707#endif 3708#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3709 template <class _Yp, class _Dp> 3710 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3711 typename enable_if 3712 < 3713 !is_lvalue_reference<_Dp>::value && 3714 !is_array<_Yp>::value && 3715 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3716 __nat 3717 >::type = __nat()); 3718 template <class _Yp, class _Dp> 3719 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3720 typename enable_if 3721 < 3722 is_lvalue_reference<_Dp>::value && 3723 !is_array<_Yp>::value && 3724 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3725 __nat 3726 >::type = __nat()); 3727#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3728 template <class _Yp, class _Dp> 3729 shared_ptr(unique_ptr<_Yp, _Dp>, 3730 typename enable_if 3731 < 3732 !is_lvalue_reference<_Dp>::value && 3733 !is_array<_Yp>::value && 3734 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3735 __nat 3736 >::type = __nat()); 3737 template <class _Yp, class _Dp> 3738 shared_ptr(unique_ptr<_Yp, _Dp>, 3739 typename enable_if 3740 < 3741 is_lvalue_reference<_Dp>::value && 3742 !is_array<_Yp>::value && 3743 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3744 __nat 3745 >::type = __nat()); 3746#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3747 3748 ~shared_ptr(); 3749 3750 _LIBCPP_INLINE_VISIBILITY 3751 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3752 template<class _Yp> 3753 typename enable_if 3754 < 3755 is_convertible<_Yp*, element_type*>::value, 3756 shared_ptr& 3757 >::type 3758 _LIBCPP_INLINE_VISIBILITY 3759 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3760#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3761 _LIBCPP_INLINE_VISIBILITY 3762 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3763 template<class _Yp> 3764 typename enable_if 3765 < 3766 is_convertible<_Yp*, element_type*>::value, 3767 shared_ptr<_Tp>& 3768 >::type 3769 _LIBCPP_INLINE_VISIBILITY 3770 operator=(shared_ptr<_Yp>&& __r); 3771#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3772 template<class _Yp> 3773 _LIBCPP_INLINE_VISIBILITY 3774 typename enable_if 3775 < 3776 !is_array<_Yp>::value && 3777 is_convertible<_Yp*, element_type*>::value, 3778 shared_ptr 3779 >::type& 3780 operator=(auto_ptr<_Yp>&& __r); 3781#endif 3782#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3783#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3784 template<class _Yp> 3785 _LIBCPP_INLINE_VISIBILITY 3786 typename enable_if 3787 < 3788 !is_array<_Yp>::value && 3789 is_convertible<_Yp*, element_type*>::value, 3790 shared_ptr& 3791 >::type 3792 operator=(auto_ptr<_Yp> __r); 3793#endif 3794#endif 3795 template <class _Yp, class _Dp> 3796 typename enable_if 3797 < 3798 !is_array<_Yp>::value && 3799 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3800 shared_ptr& 3801 >::type 3802#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3803 _LIBCPP_INLINE_VISIBILITY 3804 operator=(unique_ptr<_Yp, _Dp>&& __r); 3805#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3806 _LIBCPP_INLINE_VISIBILITY 3807 operator=(unique_ptr<_Yp, _Dp> __r); 3808#endif 3809 3810 _LIBCPP_INLINE_VISIBILITY 3811 void swap(shared_ptr& __r) _NOEXCEPT; 3812 _LIBCPP_INLINE_VISIBILITY 3813 void reset() _NOEXCEPT; 3814 template<class _Yp> 3815 typename enable_if 3816 < 3817 is_convertible<_Yp*, element_type*>::value, 3818 void 3819 >::type 3820 _LIBCPP_INLINE_VISIBILITY 3821 reset(_Yp* __p); 3822 template<class _Yp, class _Dp> 3823 typename enable_if 3824 < 3825 is_convertible<_Yp*, element_type*>::value, 3826 void 3827 >::type 3828 _LIBCPP_INLINE_VISIBILITY 3829 reset(_Yp* __p, _Dp __d); 3830 template<class _Yp, class _Dp, class _Alloc> 3831 typename enable_if 3832 < 3833 is_convertible<_Yp*, element_type*>::value, 3834 void 3835 >::type 3836 _LIBCPP_INLINE_VISIBILITY 3837 reset(_Yp* __p, _Dp __d, _Alloc __a); 3838 3839 _LIBCPP_INLINE_VISIBILITY 3840 element_type* get() const _NOEXCEPT {return __ptr_;} 3841 _LIBCPP_INLINE_VISIBILITY 3842 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3843 {return *__ptr_;} 3844 _LIBCPP_INLINE_VISIBILITY 3845 element_type* operator->() const _NOEXCEPT {return __ptr_;} 3846 _LIBCPP_INLINE_VISIBILITY 3847 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3848 _LIBCPP_INLINE_VISIBILITY 3849 bool unique() const _NOEXCEPT {return use_count() == 1;} 3850 _LIBCPP_INLINE_VISIBILITY 3851 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3852 template <class _Up> 3853 _LIBCPP_INLINE_VISIBILITY 3854 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3855 {return __cntrl_ < __p.__cntrl_;} 3856 template <class _Up> 3857 _LIBCPP_INLINE_VISIBILITY 3858 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3859 {return __cntrl_ < __p.__cntrl_;} 3860 _LIBCPP_INLINE_VISIBILITY 3861 bool 3862 __owner_equivalent(const shared_ptr& __p) const 3863 {return __cntrl_ == __p.__cntrl_;} 3864 3865#ifndef _LIBCPP_NO_RTTI 3866 template <class _Dp> 3867 _LIBCPP_INLINE_VISIBILITY 3868 _Dp* __get_deleter() const _NOEXCEPT 3869 {return static_cast<_Dp*>(__cntrl_ 3870 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 3871 : nullptr);} 3872#endif // _LIBCPP_NO_RTTI 3873 3874 template<class ..._Args> 3875 static 3876 shared_ptr<_Tp> 3877 make_shared(_Args&& ...__args); 3878 3879 template<class _Alloc, class ..._Args> 3880 static 3881 shared_ptr<_Tp> 3882 allocate_shared(const _Alloc& __a, _Args&& ...__args); 3883 3884private: 3885 template <class _Yp, bool = is_function<_Yp>::value> 3886 struct __shared_ptr_default_allocator 3887 { 3888 typedef allocator<_Yp> type; 3889 }; 3890 3891 template <class _Yp> 3892 struct __shared_ptr_default_allocator<_Yp, true> 3893 { 3894 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 3895 }; 3896 3897 template <class _Yp, class _OrigPtr> 3898 _LIBCPP_INLINE_VISIBILITY 3899 typename enable_if<is_convertible<_OrigPtr*, 3900 const enable_shared_from_this<_Yp>* 3901 >::value, 3902 void>::type 3903 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3904 _OrigPtr* __ptr) _NOEXCEPT 3905 { 3906 typedef typename remove_cv<_Yp>::type _RawYp; 3907 if (__e && __e->__weak_this_.expired()) 3908 { 3909 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3910 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3911 } 3912 } 3913 3914 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 3915 3916 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3917 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3918}; 3919 3920 3921template<class _Tp> 3922inline 3923_LIBCPP_CONSTEXPR 3924shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3925 : __ptr_(0), 3926 __cntrl_(0) 3927{ 3928} 3929 3930template<class _Tp> 3931inline 3932_LIBCPP_CONSTEXPR 3933shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3934 : __ptr_(0), 3935 __cntrl_(0) 3936{ 3937} 3938 3939template<class _Tp> 3940template<class _Yp> 3941shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3942 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3943 : __ptr_(__p) 3944{ 3945 unique_ptr<_Yp> __hold(__p); 3946 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3947 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk; 3948 __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT()); 3949 __hold.release(); 3950 __enable_weak_this(__p, __p); 3951} 3952 3953template<class _Tp> 3954template<class _Yp, class _Dp> 3955shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 3956 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3957 : __ptr_(__p) 3958{ 3959#ifndef _LIBCPP_NO_EXCEPTIONS 3960 try 3961 { 3962#endif // _LIBCPP_NO_EXCEPTIONS 3963 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3964 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3965 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3966 __enable_weak_this(__p, __p); 3967#ifndef _LIBCPP_NO_EXCEPTIONS 3968 } 3969 catch (...) 3970 { 3971 __d(__p); 3972 throw; 3973 } 3974#endif // _LIBCPP_NO_EXCEPTIONS 3975} 3976 3977template<class _Tp> 3978template<class _Dp> 3979shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 3980 : __ptr_(0) 3981{ 3982#ifndef _LIBCPP_NO_EXCEPTIONS 3983 try 3984 { 3985#endif // _LIBCPP_NO_EXCEPTIONS 3986 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 3987 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 3988 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3989#ifndef _LIBCPP_NO_EXCEPTIONS 3990 } 3991 catch (...) 3992 { 3993 __d(__p); 3994 throw; 3995 } 3996#endif // _LIBCPP_NO_EXCEPTIONS 3997} 3998 3999template<class _Tp> 4000template<class _Yp, class _Dp, class _Alloc> 4001shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 4002 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4003 : __ptr_(__p) 4004{ 4005#ifndef _LIBCPP_NO_EXCEPTIONS 4006 try 4007 { 4008#endif // _LIBCPP_NO_EXCEPTIONS 4009 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 4010 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4011 typedef __allocator_destructor<_A2> _D2; 4012 _A2 __a2(__a); 4013 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4014 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4015 _CntrlBlk(__p, __d, __a); 4016 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4017 __enable_weak_this(__p, __p); 4018#ifndef _LIBCPP_NO_EXCEPTIONS 4019 } 4020 catch (...) 4021 { 4022 __d(__p); 4023 throw; 4024 } 4025#endif // _LIBCPP_NO_EXCEPTIONS 4026} 4027 4028template<class _Tp> 4029template<class _Dp, class _Alloc> 4030shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 4031 : __ptr_(0) 4032{ 4033#ifndef _LIBCPP_NO_EXCEPTIONS 4034 try 4035 { 4036#endif // _LIBCPP_NO_EXCEPTIONS 4037 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 4038 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4039 typedef __allocator_destructor<_A2> _D2; 4040 _A2 __a2(__a); 4041 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4042 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4043 _CntrlBlk(__p, __d, __a); 4044 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4045#ifndef _LIBCPP_NO_EXCEPTIONS 4046 } 4047 catch (...) 4048 { 4049 __d(__p); 4050 throw; 4051 } 4052#endif // _LIBCPP_NO_EXCEPTIONS 4053} 4054 4055template<class _Tp> 4056template<class _Yp> 4057inline 4058shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 4059 : __ptr_(__p), 4060 __cntrl_(__r.__cntrl_) 4061{ 4062 if (__cntrl_) 4063 __cntrl_->__add_shared(); 4064} 4065 4066template<class _Tp> 4067inline 4068shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 4069 : __ptr_(__r.__ptr_), 4070 __cntrl_(__r.__cntrl_) 4071{ 4072 if (__cntrl_) 4073 __cntrl_->__add_shared(); 4074} 4075 4076template<class _Tp> 4077template<class _Yp> 4078inline 4079shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4080 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4081 _NOEXCEPT 4082 : __ptr_(__r.__ptr_), 4083 __cntrl_(__r.__cntrl_) 4084{ 4085 if (__cntrl_) 4086 __cntrl_->__add_shared(); 4087} 4088 4089#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4090 4091template<class _Tp> 4092inline 4093shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4094 : __ptr_(__r.__ptr_), 4095 __cntrl_(__r.__cntrl_) 4096{ 4097 __r.__ptr_ = 0; 4098 __r.__cntrl_ = 0; 4099} 4100 4101template<class _Tp> 4102template<class _Yp> 4103inline 4104shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4105 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4106 _NOEXCEPT 4107 : __ptr_(__r.__ptr_), 4108 __cntrl_(__r.__cntrl_) 4109{ 4110 __r.__ptr_ = 0; 4111 __r.__cntrl_ = 0; 4112} 4113 4114#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4115 4116#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4117template<class _Tp> 4118template<class _Yp> 4119#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4120shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4121#else 4122shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4123#endif 4124 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4125 : __ptr_(__r.get()) 4126{ 4127 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4128 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4129 __enable_weak_this(__r.get(), __r.get()); 4130 __r.release(); 4131} 4132#endif 4133 4134template<class _Tp> 4135template <class _Yp, class _Dp> 4136#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4137shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4138#else 4139shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4140#endif 4141 typename enable_if 4142 < 4143 !is_lvalue_reference<_Dp>::value && 4144 !is_array<_Yp>::value && 4145 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4146 __nat 4147 >::type) 4148 : __ptr_(__r.get()) 4149{ 4150#if _LIBCPP_STD_VER > 11 4151 if (__ptr_ == nullptr) 4152 __cntrl_ = nullptr; 4153 else 4154#endif 4155 { 4156 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4157 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4158 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 4159 __enable_weak_this(__r.get(), __r.get()); 4160 } 4161 __r.release(); 4162} 4163 4164template<class _Tp> 4165template <class _Yp, class _Dp> 4166#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4167shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4168#else 4169shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4170#endif 4171 typename enable_if 4172 < 4173 is_lvalue_reference<_Dp>::value && 4174 !is_array<_Yp>::value && 4175 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4176 __nat 4177 >::type) 4178 : __ptr_(__r.get()) 4179{ 4180#if _LIBCPP_STD_VER > 11 4181 if (__ptr_ == nullptr) 4182 __cntrl_ = nullptr; 4183 else 4184#endif 4185 { 4186 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4187 typedef __shared_ptr_pointer<_Yp*, 4188 reference_wrapper<typename remove_reference<_Dp>::type>, 4189 _AllocT > _CntrlBlk; 4190 __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT()); 4191 __enable_weak_this(__r.get(), __r.get()); 4192 } 4193 __r.release(); 4194} 4195 4196template<class _Tp> 4197template<class ..._Args> 4198shared_ptr<_Tp> 4199shared_ptr<_Tp>::make_shared(_Args&& ...__args) 4200{ 4201 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared" ); 4202 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4203 typedef allocator<_CntrlBlk> _A2; 4204 typedef __allocator_destructor<_A2> _D2; 4205 _A2 __a2; 4206 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4207 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4208 shared_ptr<_Tp> __r; 4209 __r.__ptr_ = __hold2.get()->get(); 4210 __r.__cntrl_ = __hold2.release(); 4211 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4212 return __r; 4213} 4214 4215template<class _Tp> 4216template<class _Alloc, class ..._Args> 4217shared_ptr<_Tp> 4218shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args) 4219{ 4220 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared" ); 4221 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4222 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4223 typedef __allocator_destructor<_A2> _D2; 4224 _A2 __a2(__a); 4225 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4226 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4227 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4228 shared_ptr<_Tp> __r; 4229 __r.__ptr_ = __hold2.get()->get(); 4230 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4231 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4232 return __r; 4233} 4234 4235template<class _Tp> 4236shared_ptr<_Tp>::~shared_ptr() 4237{ 4238 if (__cntrl_) 4239 __cntrl_->__release_shared(); 4240} 4241 4242template<class _Tp> 4243inline 4244shared_ptr<_Tp>& 4245shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4246{ 4247 shared_ptr(__r).swap(*this); 4248 return *this; 4249} 4250 4251template<class _Tp> 4252template<class _Yp> 4253inline 4254typename enable_if 4255< 4256 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4257 shared_ptr<_Tp>& 4258>::type 4259shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4260{ 4261 shared_ptr(__r).swap(*this); 4262 return *this; 4263} 4264 4265#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4266 4267template<class _Tp> 4268inline 4269shared_ptr<_Tp>& 4270shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4271{ 4272 shared_ptr(_VSTD::move(__r)).swap(*this); 4273 return *this; 4274} 4275 4276template<class _Tp> 4277template<class _Yp> 4278inline 4279typename enable_if 4280< 4281 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4282 shared_ptr<_Tp>& 4283>::type 4284shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4285{ 4286 shared_ptr(_VSTD::move(__r)).swap(*this); 4287 return *this; 4288} 4289 4290#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4291template<class _Tp> 4292template<class _Yp> 4293inline 4294typename enable_if 4295< 4296 !is_array<_Yp>::value && 4297 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4298 shared_ptr<_Tp> 4299>::type& 4300shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4301{ 4302 shared_ptr(_VSTD::move(__r)).swap(*this); 4303 return *this; 4304} 4305#endif 4306 4307template<class _Tp> 4308template <class _Yp, class _Dp> 4309inline 4310typename enable_if 4311< 4312 !is_array<_Yp>::value && 4313 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4314 typename shared_ptr<_Tp>::element_type*>::value, 4315 shared_ptr<_Tp>& 4316>::type 4317shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4318{ 4319 shared_ptr(_VSTD::move(__r)).swap(*this); 4320 return *this; 4321} 4322 4323#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4324 4325#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4326template<class _Tp> 4327template<class _Yp> 4328inline _LIBCPP_INLINE_VISIBILITY 4329typename enable_if 4330< 4331 !is_array<_Yp>::value && 4332 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4333 shared_ptr<_Tp>& 4334>::type 4335shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4336{ 4337 shared_ptr(__r).swap(*this); 4338 return *this; 4339} 4340#endif 4341 4342template<class _Tp> 4343template <class _Yp, class _Dp> 4344inline _LIBCPP_INLINE_VISIBILITY 4345typename enable_if 4346< 4347 !is_array<_Yp>::value && 4348 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4349 typename shared_ptr<_Tp>::element_type*>::value, 4350 shared_ptr<_Tp>& 4351>::type 4352shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4353{ 4354 shared_ptr(_VSTD::move(__r)).swap(*this); 4355 return *this; 4356} 4357 4358#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4359 4360template<class _Tp> 4361inline 4362void 4363shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4364{ 4365 _VSTD::swap(__ptr_, __r.__ptr_); 4366 _VSTD::swap(__cntrl_, __r.__cntrl_); 4367} 4368 4369template<class _Tp> 4370inline 4371void 4372shared_ptr<_Tp>::reset() _NOEXCEPT 4373{ 4374 shared_ptr().swap(*this); 4375} 4376 4377template<class _Tp> 4378template<class _Yp> 4379inline 4380typename enable_if 4381< 4382 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4383 void 4384>::type 4385shared_ptr<_Tp>::reset(_Yp* __p) 4386{ 4387 shared_ptr(__p).swap(*this); 4388} 4389 4390template<class _Tp> 4391template<class _Yp, class _Dp> 4392inline 4393typename enable_if 4394< 4395 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4396 void 4397>::type 4398shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4399{ 4400 shared_ptr(__p, __d).swap(*this); 4401} 4402 4403template<class _Tp> 4404template<class _Yp, class _Dp, class _Alloc> 4405inline 4406typename enable_if 4407< 4408 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4409 void 4410>::type 4411shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4412{ 4413 shared_ptr(__p, __d, __a).swap(*this); 4414} 4415 4416#ifndef _LIBCPP_HAS_NO_VARIADICS 4417 4418template<class _Tp, class ..._Args> 4419inline _LIBCPP_INLINE_VISIBILITY 4420typename enable_if 4421< 4422 !is_array<_Tp>::value, 4423 shared_ptr<_Tp> 4424>::type 4425make_shared(_Args&& ...__args) 4426{ 4427 return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...); 4428} 4429 4430template<class _Tp, class _Alloc, class ..._Args> 4431inline _LIBCPP_INLINE_VISIBILITY 4432typename enable_if 4433< 4434 !is_array<_Tp>::value, 4435 shared_ptr<_Tp> 4436>::type 4437allocate_shared(const _Alloc& __a, _Args&& ...__args) 4438{ 4439 return shared_ptr<_Tp>::allocate_shared(__a, _VSTD::forward<_Args>(__args)...); 4440} 4441 4442#else // _LIBCPP_HAS_NO_VARIADICS 4443 4444template<class _Tp> 4445inline _LIBCPP_INLINE_VISIBILITY 4446shared_ptr<_Tp> 4447make_shared() 4448{ 4449 return shared_ptr<_Tp>::make_shared(); 4450} 4451 4452template<class _Tp, class _A0> 4453inline _LIBCPP_INLINE_VISIBILITY 4454shared_ptr<_Tp> 4455make_shared(_A0& __a0) 4456{ 4457 return shared_ptr<_Tp>::make_shared(__a0); 4458} 4459 4460template<class _Tp, class _A0, class _A1> 4461inline _LIBCPP_INLINE_VISIBILITY 4462shared_ptr<_Tp> 4463make_shared(_A0& __a0, _A1& __a1) 4464{ 4465 return shared_ptr<_Tp>::make_shared(__a0, __a1); 4466} 4467 4468template<class _Tp, class _A0, class _A1, class _A2> 4469inline _LIBCPP_INLINE_VISIBILITY 4470shared_ptr<_Tp> 4471make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4472{ 4473 return shared_ptr<_Tp>::make_shared(__a0, __a1, __a2); 4474} 4475 4476template<class _Tp, class _Alloc> 4477inline _LIBCPP_INLINE_VISIBILITY 4478shared_ptr<_Tp> 4479allocate_shared(const _Alloc& __a) 4480{ 4481 return shared_ptr<_Tp>::allocate_shared(__a); 4482} 4483 4484template<class _Tp, class _Alloc, class _A0> 4485inline _LIBCPP_INLINE_VISIBILITY 4486shared_ptr<_Tp> 4487allocate_shared(const _Alloc& __a, _A0& __a0) 4488{ 4489 return shared_ptr<_Tp>::allocate_shared(__a, __a0); 4490} 4491 4492template<class _Tp, class _Alloc, class _A0, class _A1> 4493inline _LIBCPP_INLINE_VISIBILITY 4494shared_ptr<_Tp> 4495allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4496{ 4497 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1); 4498} 4499 4500template<class _Tp, class _Alloc, class _A0, class _A1, class _A2> 4501inline _LIBCPP_INLINE_VISIBILITY 4502shared_ptr<_Tp> 4503allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4504{ 4505 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1, __a2); 4506} 4507 4508#endif // _LIBCPP_HAS_NO_VARIADICS 4509 4510template<class _Tp, class _Up> 4511inline _LIBCPP_INLINE_VISIBILITY 4512bool 4513operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4514{ 4515 return __x.get() == __y.get(); 4516} 4517 4518template<class _Tp, class _Up> 4519inline _LIBCPP_INLINE_VISIBILITY 4520bool 4521operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4522{ 4523 return !(__x == __y); 4524} 4525 4526template<class _Tp, class _Up> 4527inline _LIBCPP_INLINE_VISIBILITY 4528bool 4529operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4530{ 4531#if _LIBCPP_STD_VER <= 11 4532 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4533 return less<_Vp>()(__x.get(), __y.get()); 4534#else 4535 return less<>()(__x.get(), __y.get()); 4536#endif 4537 4538} 4539 4540template<class _Tp, class _Up> 4541inline _LIBCPP_INLINE_VISIBILITY 4542bool 4543operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4544{ 4545 return __y < __x; 4546} 4547 4548template<class _Tp, class _Up> 4549inline _LIBCPP_INLINE_VISIBILITY 4550bool 4551operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4552{ 4553 return !(__y < __x); 4554} 4555 4556template<class _Tp, class _Up> 4557inline _LIBCPP_INLINE_VISIBILITY 4558bool 4559operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4560{ 4561 return !(__x < __y); 4562} 4563 4564template<class _Tp> 4565inline _LIBCPP_INLINE_VISIBILITY 4566bool 4567operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4568{ 4569 return !__x; 4570} 4571 4572template<class _Tp> 4573inline _LIBCPP_INLINE_VISIBILITY 4574bool 4575operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4576{ 4577 return !__x; 4578} 4579 4580template<class _Tp> 4581inline _LIBCPP_INLINE_VISIBILITY 4582bool 4583operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4584{ 4585 return static_cast<bool>(__x); 4586} 4587 4588template<class _Tp> 4589inline _LIBCPP_INLINE_VISIBILITY 4590bool 4591operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4592{ 4593 return static_cast<bool>(__x); 4594} 4595 4596template<class _Tp> 4597inline _LIBCPP_INLINE_VISIBILITY 4598bool 4599operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4600{ 4601 return less<_Tp*>()(__x.get(), nullptr); 4602} 4603 4604template<class _Tp> 4605inline _LIBCPP_INLINE_VISIBILITY 4606bool 4607operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4608{ 4609 return less<_Tp*>()(nullptr, __x.get()); 4610} 4611 4612template<class _Tp> 4613inline _LIBCPP_INLINE_VISIBILITY 4614bool 4615operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4616{ 4617 return nullptr < __x; 4618} 4619 4620template<class _Tp> 4621inline _LIBCPP_INLINE_VISIBILITY 4622bool 4623operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4624{ 4625 return __x < nullptr; 4626} 4627 4628template<class _Tp> 4629inline _LIBCPP_INLINE_VISIBILITY 4630bool 4631operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4632{ 4633 return !(nullptr < __x); 4634} 4635 4636template<class _Tp> 4637inline _LIBCPP_INLINE_VISIBILITY 4638bool 4639operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4640{ 4641 return !(__x < nullptr); 4642} 4643 4644template<class _Tp> 4645inline _LIBCPP_INLINE_VISIBILITY 4646bool 4647operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4648{ 4649 return !(__x < nullptr); 4650} 4651 4652template<class _Tp> 4653inline _LIBCPP_INLINE_VISIBILITY 4654bool 4655operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4656{ 4657 return !(nullptr < __x); 4658} 4659 4660template<class _Tp> 4661inline _LIBCPP_INLINE_VISIBILITY 4662void 4663swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4664{ 4665 __x.swap(__y); 4666} 4667 4668template<class _Tp, class _Up> 4669inline _LIBCPP_INLINE_VISIBILITY 4670typename enable_if 4671< 4672 !is_array<_Tp>::value && !is_array<_Up>::value, 4673 shared_ptr<_Tp> 4674>::type 4675static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4676{ 4677 return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); 4678} 4679 4680template<class _Tp, class _Up> 4681inline _LIBCPP_INLINE_VISIBILITY 4682typename enable_if 4683< 4684 !is_array<_Tp>::value && !is_array<_Up>::value, 4685 shared_ptr<_Tp> 4686>::type 4687dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4688{ 4689 _Tp* __p = dynamic_cast<_Tp*>(__r.get()); 4690 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4691} 4692 4693template<class _Tp, class _Up> 4694typename enable_if 4695< 4696 is_array<_Tp>::value == is_array<_Up>::value, 4697 shared_ptr<_Tp> 4698>::type 4699const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4700{ 4701 typedef typename remove_extent<_Tp>::type _RTp; 4702 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4703} 4704 4705#ifndef _LIBCPP_NO_RTTI 4706 4707template<class _Dp, class _Tp> 4708inline _LIBCPP_INLINE_VISIBILITY 4709_Dp* 4710get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4711{ 4712 return __p.template __get_deleter<_Dp>(); 4713} 4714 4715#endif // _LIBCPP_NO_RTTI 4716 4717template<class _Tp> 4718class _LIBCPP_TEMPLATE_VIS weak_ptr 4719{ 4720public: 4721 typedef _Tp element_type; 4722private: 4723 element_type* __ptr_; 4724 __shared_weak_count* __cntrl_; 4725 4726public: 4727 _LIBCPP_INLINE_VISIBILITY 4728 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4729 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4730 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4731 _NOEXCEPT; 4732 _LIBCPP_INLINE_VISIBILITY 4733 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4734 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4735 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4736 _NOEXCEPT; 4737 4738#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4739 _LIBCPP_INLINE_VISIBILITY 4740 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4741 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4742 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4743 _NOEXCEPT; 4744#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4745 ~weak_ptr(); 4746 4747 _LIBCPP_INLINE_VISIBILITY 4748 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4749 template<class _Yp> 4750 typename enable_if 4751 < 4752 is_convertible<_Yp*, element_type*>::value, 4753 weak_ptr& 4754 >::type 4755 _LIBCPP_INLINE_VISIBILITY 4756 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4757 4758#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4759 4760 _LIBCPP_INLINE_VISIBILITY 4761 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4762 template<class _Yp> 4763 typename enable_if 4764 < 4765 is_convertible<_Yp*, element_type*>::value, 4766 weak_ptr& 4767 >::type 4768 _LIBCPP_INLINE_VISIBILITY 4769 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4770 4771#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4772 4773 template<class _Yp> 4774 typename enable_if 4775 < 4776 is_convertible<_Yp*, element_type*>::value, 4777 weak_ptr& 4778 >::type 4779 _LIBCPP_INLINE_VISIBILITY 4780 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4781 4782 _LIBCPP_INLINE_VISIBILITY 4783 void swap(weak_ptr& __r) _NOEXCEPT; 4784 _LIBCPP_INLINE_VISIBILITY 4785 void reset() _NOEXCEPT; 4786 4787 _LIBCPP_INLINE_VISIBILITY 4788 long use_count() const _NOEXCEPT 4789 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4790 _LIBCPP_INLINE_VISIBILITY 4791 bool expired() const _NOEXCEPT 4792 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4793 shared_ptr<_Tp> lock() const _NOEXCEPT; 4794 template<class _Up> 4795 _LIBCPP_INLINE_VISIBILITY 4796 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4797 {return __cntrl_ < __r.__cntrl_;} 4798 template<class _Up> 4799 _LIBCPP_INLINE_VISIBILITY 4800 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 4801 {return __cntrl_ < __r.__cntrl_;} 4802 4803 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4804 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4805}; 4806 4807template<class _Tp> 4808inline 4809_LIBCPP_CONSTEXPR 4810weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 4811 : __ptr_(0), 4812 __cntrl_(0) 4813{ 4814} 4815 4816template<class _Tp> 4817inline 4818weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 4819 : __ptr_(__r.__ptr_), 4820 __cntrl_(__r.__cntrl_) 4821{ 4822 if (__cntrl_) 4823 __cntrl_->__add_weak(); 4824} 4825 4826template<class _Tp> 4827template<class _Yp> 4828inline 4829weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 4830 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4831 _NOEXCEPT 4832 : __ptr_(__r.__ptr_), 4833 __cntrl_(__r.__cntrl_) 4834{ 4835 if (__cntrl_) 4836 __cntrl_->__add_weak(); 4837} 4838 4839template<class _Tp> 4840template<class _Yp> 4841inline 4842weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 4843 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4844 _NOEXCEPT 4845 : __ptr_(__r.__ptr_), 4846 __cntrl_(__r.__cntrl_) 4847{ 4848 if (__cntrl_) 4849 __cntrl_->__add_weak(); 4850} 4851 4852#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4853 4854template<class _Tp> 4855inline 4856weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 4857 : __ptr_(__r.__ptr_), 4858 __cntrl_(__r.__cntrl_) 4859{ 4860 __r.__ptr_ = 0; 4861 __r.__cntrl_ = 0; 4862} 4863 4864template<class _Tp> 4865template<class _Yp> 4866inline 4867weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 4868 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4869 _NOEXCEPT 4870 : __ptr_(__r.__ptr_), 4871 __cntrl_(__r.__cntrl_) 4872{ 4873 __r.__ptr_ = 0; 4874 __r.__cntrl_ = 0; 4875} 4876 4877#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4878 4879template<class _Tp> 4880weak_ptr<_Tp>::~weak_ptr() 4881{ 4882 if (__cntrl_) 4883 __cntrl_->__release_weak(); 4884} 4885 4886template<class _Tp> 4887inline 4888weak_ptr<_Tp>& 4889weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 4890{ 4891 weak_ptr(__r).swap(*this); 4892 return *this; 4893} 4894 4895template<class _Tp> 4896template<class _Yp> 4897inline 4898typename enable_if 4899< 4900 is_convertible<_Yp*, _Tp*>::value, 4901 weak_ptr<_Tp>& 4902>::type 4903weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 4904{ 4905 weak_ptr(__r).swap(*this); 4906 return *this; 4907} 4908 4909#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4910 4911template<class _Tp> 4912inline 4913weak_ptr<_Tp>& 4914weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 4915{ 4916 weak_ptr(_VSTD::move(__r)).swap(*this); 4917 return *this; 4918} 4919 4920template<class _Tp> 4921template<class _Yp> 4922inline 4923typename enable_if 4924< 4925 is_convertible<_Yp*, _Tp*>::value, 4926 weak_ptr<_Tp>& 4927>::type 4928weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 4929{ 4930 weak_ptr(_VSTD::move(__r)).swap(*this); 4931 return *this; 4932} 4933 4934#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4935 4936template<class _Tp> 4937template<class _Yp> 4938inline 4939typename enable_if 4940< 4941 is_convertible<_Yp*, _Tp*>::value, 4942 weak_ptr<_Tp>& 4943>::type 4944weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 4945{ 4946 weak_ptr(__r).swap(*this); 4947 return *this; 4948} 4949 4950template<class _Tp> 4951inline 4952void 4953weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 4954{ 4955 _VSTD::swap(__ptr_, __r.__ptr_); 4956 _VSTD::swap(__cntrl_, __r.__cntrl_); 4957} 4958 4959template<class _Tp> 4960inline _LIBCPP_INLINE_VISIBILITY 4961void 4962swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 4963{ 4964 __x.swap(__y); 4965} 4966 4967template<class _Tp> 4968inline 4969void 4970weak_ptr<_Tp>::reset() _NOEXCEPT 4971{ 4972 weak_ptr().swap(*this); 4973} 4974 4975template<class _Tp> 4976template<class _Yp> 4977shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 4978 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4979 : __ptr_(__r.__ptr_), 4980 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 4981{ 4982 if (__cntrl_ == 0) 4983 __throw_bad_weak_ptr(); 4984} 4985 4986template<class _Tp> 4987shared_ptr<_Tp> 4988weak_ptr<_Tp>::lock() const _NOEXCEPT 4989{ 4990 shared_ptr<_Tp> __r; 4991 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 4992 if (__r.__cntrl_) 4993 __r.__ptr_ = __ptr_; 4994 return __r; 4995} 4996 4997#if _LIBCPP_STD_VER > 14 4998template <class _Tp = void> struct owner_less; 4999#else 5000template <class _Tp> struct owner_less; 5001#endif 5002 5003template <class _Tp> 5004struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 5005 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 5006{ 5007 typedef bool result_type; 5008 _LIBCPP_INLINE_VISIBILITY 5009 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5010 {return __x.owner_before(__y);} 5011 _LIBCPP_INLINE_VISIBILITY 5012 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5013 {return __x.owner_before(__y);} 5014 _LIBCPP_INLINE_VISIBILITY 5015 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5016 {return __x.owner_before(__y);} 5017}; 5018 5019template <class _Tp> 5020struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 5021 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 5022{ 5023 typedef bool result_type; 5024 _LIBCPP_INLINE_VISIBILITY 5025 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5026 {return __x.owner_before(__y);} 5027 _LIBCPP_INLINE_VISIBILITY 5028 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5029 {return __x.owner_before(__y);} 5030 _LIBCPP_INLINE_VISIBILITY 5031 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5032 {return __x.owner_before(__y);} 5033}; 5034 5035#if _LIBCPP_STD_VER > 14 5036template <> 5037struct _LIBCPP_TEMPLATE_VIS owner_less<void> 5038{ 5039 template <class _Tp, class _Up> 5040 _LIBCPP_INLINE_VISIBILITY 5041 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5042 {return __x.owner_before(__y);} 5043 template <class _Tp, class _Up> 5044 _LIBCPP_INLINE_VISIBILITY 5045 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5046 {return __x.owner_before(__y);} 5047 template <class _Tp, class _Up> 5048 _LIBCPP_INLINE_VISIBILITY 5049 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5050 {return __x.owner_before(__y);} 5051 template <class _Tp, class _Up> 5052 _LIBCPP_INLINE_VISIBILITY 5053 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5054 {return __x.owner_before(__y);} 5055 typedef void is_transparent; 5056}; 5057#endif 5058 5059template<class _Tp> 5060class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 5061{ 5062 mutable weak_ptr<_Tp> __weak_this_; 5063protected: 5064 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 5065 enable_shared_from_this() _NOEXCEPT {} 5066 _LIBCPP_INLINE_VISIBILITY 5067 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 5068 _LIBCPP_INLINE_VISIBILITY 5069 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 5070 {return *this;} 5071 _LIBCPP_INLINE_VISIBILITY 5072 ~enable_shared_from_this() {} 5073public: 5074 _LIBCPP_INLINE_VISIBILITY 5075 shared_ptr<_Tp> shared_from_this() 5076 {return shared_ptr<_Tp>(__weak_this_);} 5077 _LIBCPP_INLINE_VISIBILITY 5078 shared_ptr<_Tp const> shared_from_this() const 5079 {return shared_ptr<const _Tp>(__weak_this_);} 5080 5081#if _LIBCPP_STD_VER > 14 5082 _LIBCPP_INLINE_VISIBILITY 5083 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 5084 { return __weak_this_; } 5085 5086 _LIBCPP_INLINE_VISIBILITY 5087 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 5088 { return __weak_this_; } 5089#endif // _LIBCPP_STD_VER > 14 5090 5091 template <class _Up> friend class shared_ptr; 5092}; 5093 5094template <class _Tp> 5095struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 5096{ 5097 typedef shared_ptr<_Tp> argument_type; 5098 typedef size_t result_type; 5099 5100 _LIBCPP_INLINE_VISIBILITY 5101 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 5102 { 5103 return hash<_Tp*>()(__ptr.get()); 5104 } 5105}; 5106 5107template<class _CharT, class _Traits, class _Yp> 5108inline _LIBCPP_INLINE_VISIBILITY 5109basic_ostream<_CharT, _Traits>& 5110operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 5111 5112 5113#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5114 5115class _LIBCPP_TYPE_VIS __sp_mut 5116{ 5117 void* __lx; 5118public: 5119 void lock() _NOEXCEPT; 5120 void unlock() _NOEXCEPT; 5121 5122private: 5123 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 5124 __sp_mut(const __sp_mut&); 5125 __sp_mut& operator=(const __sp_mut&); 5126 5127 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 5128}; 5129 5130_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5131__sp_mut& __get_sp_mut(const void*); 5132 5133template <class _Tp> 5134inline _LIBCPP_INLINE_VISIBILITY 5135bool 5136atomic_is_lock_free(const shared_ptr<_Tp>*) 5137{ 5138 return false; 5139} 5140 5141template <class _Tp> 5142_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5143shared_ptr<_Tp> 5144atomic_load(const shared_ptr<_Tp>* __p) 5145{ 5146 __sp_mut& __m = __get_sp_mut(__p); 5147 __m.lock(); 5148 shared_ptr<_Tp> __q = *__p; 5149 __m.unlock(); 5150 return __q; 5151} 5152 5153template <class _Tp> 5154inline _LIBCPP_INLINE_VISIBILITY 5155_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5156shared_ptr<_Tp> 5157atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5158{ 5159 return atomic_load(__p); 5160} 5161 5162template <class _Tp> 5163_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5164void 5165atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5166{ 5167 __sp_mut& __m = __get_sp_mut(__p); 5168 __m.lock(); 5169 __p->swap(__r); 5170 __m.unlock(); 5171} 5172 5173template <class _Tp> 5174inline _LIBCPP_INLINE_VISIBILITY 5175_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5176void 5177atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5178{ 5179 atomic_store(__p, __r); 5180} 5181 5182template <class _Tp> 5183_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5184shared_ptr<_Tp> 5185atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5186{ 5187 __sp_mut& __m = __get_sp_mut(__p); 5188 __m.lock(); 5189 __p->swap(__r); 5190 __m.unlock(); 5191 return __r; 5192} 5193 5194template <class _Tp> 5195inline _LIBCPP_INLINE_VISIBILITY 5196_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5197shared_ptr<_Tp> 5198atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5199{ 5200 return atomic_exchange(__p, __r); 5201} 5202 5203template <class _Tp> 5204_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5205bool 5206atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5207{ 5208 shared_ptr<_Tp> __temp; 5209 __sp_mut& __m = __get_sp_mut(__p); 5210 __m.lock(); 5211 if (__p->__owner_equivalent(*__v)) 5212 { 5213 _VSTD::swap(__temp, *__p); 5214 *__p = __w; 5215 __m.unlock(); 5216 return true; 5217 } 5218 _VSTD::swap(__temp, *__v); 5219 *__v = *__p; 5220 __m.unlock(); 5221 return false; 5222} 5223 5224template <class _Tp> 5225inline _LIBCPP_INLINE_VISIBILITY 5226_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5227bool 5228atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5229{ 5230 return atomic_compare_exchange_strong(__p, __v, __w); 5231} 5232 5233template <class _Tp> 5234inline _LIBCPP_INLINE_VISIBILITY 5235_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5236bool 5237atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5238 shared_ptr<_Tp> __w, memory_order, memory_order) 5239{ 5240 return atomic_compare_exchange_strong(__p, __v, __w); 5241} 5242 5243template <class _Tp> 5244inline _LIBCPP_INLINE_VISIBILITY 5245_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5246bool 5247atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5248 shared_ptr<_Tp> __w, memory_order, memory_order) 5249{ 5250 return atomic_compare_exchange_weak(__p, __v, __w); 5251} 5252 5253#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5254 5255//enum class 5256#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5257# ifndef _LIBCPP_CXX03_LANG 5258enum class pointer_safety : unsigned char { 5259 relaxed, 5260 preferred, 5261 strict 5262}; 5263# endif 5264#else 5265struct _LIBCPP_TYPE_VIS pointer_safety 5266{ 5267 enum __lx 5268 { 5269 relaxed, 5270 preferred, 5271 strict 5272 }; 5273 5274 __lx __v_; 5275 5276 _LIBCPP_INLINE_VISIBILITY 5277 pointer_safety() : __v_() {} 5278 5279 _LIBCPP_INLINE_VISIBILITY 5280 pointer_safety(__lx __v) : __v_(__v) {} 5281 _LIBCPP_INLINE_VISIBILITY 5282 operator int() const {return __v_;} 5283}; 5284#endif 5285 5286#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5287 defined(_LIBCPP_BUILDING_LIBRARY) 5288_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5289#else 5290// This function is only offered in C++03 under ABI v1. 5291# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5292inline _LIBCPP_INLINE_VISIBILITY 5293pointer_safety get_pointer_safety() _NOEXCEPT { 5294 return pointer_safety::relaxed; 5295} 5296# endif 5297#endif 5298 5299 5300_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5301_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5302_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5303_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5304 5305template <class _Tp> 5306inline _LIBCPP_INLINE_VISIBILITY 5307_Tp* 5308undeclare_reachable(_Tp* __p) 5309{ 5310 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5311} 5312 5313_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5314 5315// --- Helper for container swap -- 5316template <typename _Alloc> 5317inline _LIBCPP_INLINE_VISIBILITY 5318void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5319#if _LIBCPP_STD_VER >= 14 5320 _NOEXCEPT 5321#else 5322 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5323#endif 5324{ 5325 __swap_allocator(__a1, __a2, 5326 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5327} 5328 5329template <typename _Alloc> 5330_LIBCPP_INLINE_VISIBILITY 5331void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5332#if _LIBCPP_STD_VER >= 14 5333 _NOEXCEPT 5334#else 5335 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5336#endif 5337{ 5338 using _VSTD::swap; 5339 swap(__a1, __a2); 5340} 5341 5342template <typename _Alloc> 5343inline _LIBCPP_INLINE_VISIBILITY 5344void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5345 5346template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5347struct __noexcept_move_assign_container : public integral_constant<bool, 5348 _Traits::propagate_on_container_move_assignment::value 5349#if _LIBCPP_STD_VER > 14 5350 || _Traits::is_always_equal::value 5351#else 5352 && is_nothrow_move_assignable<_Alloc>::value 5353#endif 5354 > {}; 5355 5356 5357#ifndef _LIBCPP_HAS_NO_VARIADICS 5358template <class _Tp, class _Alloc> 5359struct __temp_value { 5360 typedef allocator_traits<_Alloc> _Traits; 5361 5362 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 5363 _Alloc &__a; 5364 5365 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5366 _Tp & get() { return *__addr(); } 5367 5368 template<class... _Args> 5369 _LIBCPP_NO_CFI 5370 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 5371 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 5372 _VSTD::forward<_Args>(__args)...); 5373 } 5374 5375 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5376 }; 5377#endif 5378 5379template<typename _Alloc, typename = void, typename = void> 5380struct __is_allocator : false_type {}; 5381 5382template<typename _Alloc> 5383struct __is_allocator<_Alloc, 5384 typename __void_t<typename _Alloc::value_type>::type, 5385 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 5386 > 5387 : true_type {}; 5388 5389// __builtin_new_allocator -- A non-templated helper for allocating and 5390// deallocating memory using __builtin_operator_new and 5391// __builtin_operator_delete. It should be used in preference to 5392// `std::allocator<T>` to avoid additional instantiations. 5393struct __builtin_new_allocator { 5394 struct __builtin_new_deleter { 5395 typedef void* pointer_type; 5396 5397 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 5398 : __size_(__size), __align_(__align) {} 5399 5400 void operator()(void* p) const _NOEXCEPT { 5401 std::__libcpp_deallocate(p, __size_, __align_); 5402 } 5403 5404 private: 5405 size_t __size_; 5406 size_t __align_; 5407 }; 5408 5409 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 5410 5411 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 5412 return __holder_t(std::__libcpp_allocate(__s, __align), 5413 __builtin_new_deleter(__s, __align)); 5414 } 5415 5416 static void __deallocate_bytes(void* __p, size_t __s, 5417 size_t __align) _NOEXCEPT { 5418 std::__libcpp_deallocate(__p, __s, __align); 5419 } 5420 5421 template <class _Tp> 5422 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5423 static __holder_t __allocate_type(size_t __n) { 5424 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5425 } 5426 5427 template <class _Tp> 5428 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5429 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 5430 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5431 } 5432}; 5433 5434 5435_LIBCPP_END_NAMESPACE_STD 5436 5437_LIBCPP_POP_MACROS 5438 5439#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 5440# include <__pstl_memory> 5441#endif 5442 5443#endif // _LIBCPP_MEMORY 5444