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> constexpr 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<T>::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); // constexpr and [[nodiscard]] in C++20 87 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // constexpr and [[nodiscard]] in C++20 88 89 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; // constexpr in C++20 90 91 template <class T, class... Args> 92 static void construct(allocator_type& a, T* p, Args&&... args); // constexpr in C++20 93 94 template <class T> 95 static void destroy(allocator_type& a, T* p); // constexpr in C++20 96 97 static size_type max_size(const allocator_type& a); // noexcept in C++14, constexpr in C++20 98 static allocator_type select_on_container_copy_construction(const allocator_type& a); // constexpr in C++20 99}; 100 101template <> 102class allocator<void> // removed in C++20 103{ 104public: 105 typedef void* pointer; // deprecated in C++17 106 typedef const void* const_pointer; // deprecated in C++17 107 typedef void value_type; // deprecated in C++17 108 109 template <class _Up> struct rebind {typedef allocator<_Up> other;}; // deprecated in C++17 110}; 111 112template <class T> 113class allocator 114{ 115public: 116 typedef size_t size_type; 117 typedef ptrdiff_t difference_type; 118 typedef T* pointer; // deprecated in C++17, removed in C++20 119 typedef const T* const_pointer; // deprecated in C++17, removed in C++20 120 typedef typename add_lvalue_reference<T>::type 121 reference; // deprecated in C++17, removed in C++20 122 typedef typename add_lvalue_reference<const T>::type 123 const_reference; // deprecated in C++17, removed in C++20 124 125 typedef T value_type; 126 127 template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20 128 129 typedef true_type propagate_on_container_move_assignment; 130 typedef true_type is_always_equal; 131 132 constexpr allocator() noexcept; // constexpr in C++20 133 constexpr allocator(const allocator&) noexcept; // constexpr in C++20 134 template <class U> 135 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 136 ~allocator(); // constexpr in C++20 137 pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20 138 const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20 139 T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20 140 T* allocate(size_t n); // constexpr in C++20 141 void deallocate(T* p, size_t n) noexcept; // constexpr in C++20 142 size_type max_size() const noexcept; // deprecated in C++17, removed in C++20 143 template<class U, class... Args> 144 void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20 145 template <class U> 146 void destroy(U* p); // deprecated in C++17, removed in C++20 147}; 148 149template <class T, class U> 150bool operator==(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 151 152template <class T, class U> 153bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 154 155template <class OutputIterator, class T> 156class raw_storage_iterator 157 : public iterator<output_iterator_tag, 158 T, // purposefully not C++03 159 ptrdiff_t, // purposefully not C++03 160 T*, // purposefully not C++03 161 raw_storage_iterator&> // purposefully not C++03 162{ 163public: 164 explicit raw_storage_iterator(OutputIterator x); 165 raw_storage_iterator& operator*(); 166 raw_storage_iterator& operator=(const T& element); 167 raw_storage_iterator& operator++(); 168 raw_storage_iterator operator++(int); 169}; 170 171template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 172template <class T> void return_temporary_buffer(T* p) noexcept; 173 174template <class T> T* addressof(T& r) noexcept; 175template <class T> T* addressof(const T&& r) noexcept = delete; 176 177template <class InputIterator, class ForwardIterator> 178ForwardIterator 179uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 180 181template <class InputIterator, class Size, class ForwardIterator> 182ForwardIterator 183uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 184 185template <class ForwardIterator, class T> 186void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 187 188template <class ForwardIterator, class Size, class T> 189ForwardIterator 190uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 191 192template <class T, class ...Args> 193constexpr T* construct_at(T* location, Args&& ...args); // since C++20 194 195template <class T> 196void destroy_at(T* location); // constexpr in C++20 197 198template <class ForwardIterator> 199void destroy(ForwardIterator first, ForwardIterator last); // constexpr in C++20 200 201template <class ForwardIterator, class Size> 202ForwardIterator destroy_n(ForwardIterator first, Size n); // constexpr in C++20 203 204template <class InputIterator, class ForwardIterator> 205 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 206 207template <class InputIterator, class Size, class ForwardIterator> 208 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 209 210template <class ForwardIterator> 211 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 212 213template <class ForwardIterator, class Size> 214 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 215 216template <class ForwardIterator> 217 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 218 219template <class ForwardIterator, class Size> 220 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 221 222template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 223 224template<class X> 225class auto_ptr // deprecated in C++11, removed in C++17 226{ 227public: 228 typedef X element_type; 229 230 explicit auto_ptr(X* p =0) throw(); 231 auto_ptr(auto_ptr&) throw(); 232 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 233 auto_ptr& operator=(auto_ptr&) throw(); 234 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 235 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 236 ~auto_ptr() throw(); 237 238 typename add_lvalue_reference<X>::type operator*() const throw(); 239 X* operator->() const throw(); 240 X* get() const throw(); 241 X* release() throw(); 242 void reset(X* p =0) throw(); 243 244 auto_ptr(auto_ptr_ref<X>) throw(); 245 template<class Y> operator auto_ptr_ref<Y>() throw(); 246 template<class Y> operator auto_ptr<Y>() throw(); 247}; 248 249template <class T> 250struct default_delete 251{ 252 constexpr default_delete() noexcept = default; 253 template <class U> default_delete(const default_delete<U>&) noexcept; 254 255 void operator()(T*) const noexcept; 256}; 257 258template <class T> 259struct default_delete<T[]> 260{ 261 constexpr default_delete() noexcept = default; 262 void operator()(T*) const noexcept; 263 template <class U> void operator()(U*) const = delete; 264}; 265 266template <class T, class D = default_delete<T>> 267class unique_ptr 268{ 269public: 270 typedef see below pointer; 271 typedef T element_type; 272 typedef D deleter_type; 273 274 // constructors 275 constexpr unique_ptr() noexcept; 276 explicit unique_ptr(pointer p) noexcept; 277 unique_ptr(pointer p, see below d1) noexcept; 278 unique_ptr(pointer p, see below d2) noexcept; 279 unique_ptr(unique_ptr&& u) noexcept; 280 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 281 template <class U, class E> 282 unique_ptr(unique_ptr<U, E>&& u) noexcept; 283 template <class U> 284 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 285 286 // destructor 287 ~unique_ptr(); 288 289 // assignment 290 unique_ptr& operator=(unique_ptr&& u) noexcept; 291 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 292 unique_ptr& operator=(nullptr_t) noexcept; 293 294 // observers 295 typename add_lvalue_reference<T>::type operator*() const; 296 pointer operator->() const noexcept; 297 pointer get() const noexcept; 298 deleter_type& get_deleter() noexcept; 299 const deleter_type& get_deleter() const noexcept; 300 explicit operator bool() const noexcept; 301 302 // modifiers 303 pointer release() noexcept; 304 void reset(pointer p = pointer()) noexcept; 305 void swap(unique_ptr& u) noexcept; 306}; 307 308template <class T, class D> 309class unique_ptr<T[], D> 310{ 311public: 312 typedef implementation-defined pointer; 313 typedef T element_type; 314 typedef D deleter_type; 315 316 // constructors 317 constexpr unique_ptr() noexcept; 318 explicit unique_ptr(pointer p) noexcept; 319 unique_ptr(pointer p, see below d) noexcept; 320 unique_ptr(pointer p, see below d) noexcept; 321 unique_ptr(unique_ptr&& u) noexcept; 322 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 323 324 // destructor 325 ~unique_ptr(); 326 327 // assignment 328 unique_ptr& operator=(unique_ptr&& u) noexcept; 329 unique_ptr& operator=(nullptr_t) noexcept; 330 331 // observers 332 T& operator[](size_t i) const; 333 pointer get() const noexcept; 334 deleter_type& get_deleter() noexcept; 335 const deleter_type& get_deleter() const noexcept; 336 explicit operator bool() const noexcept; 337 338 // modifiers 339 pointer release() noexcept; 340 void reset(pointer p = pointer()) noexcept; 341 void reset(nullptr_t) noexcept; 342 template <class U> void reset(U) = delete; 343 void swap(unique_ptr& u) noexcept; 344}; 345 346template <class T, class D> 347 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 348 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); 353template <class T1, class D1, class T2, class D2> 354 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 355template <class T1, class D1, class T2, class D2> 356 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 357template <class T1, class D1, class T2, class D2> 358 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 359template <class T1, class D1, class T2, class D2> 360 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 361 362template <class T, class D> 363 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 364template <class T, class D> 365 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 366template <class T, class D> 367 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 368template <class T, class D> 369 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 370 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); 379template <class T, class D> 380 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 381template <class T, class D> 382 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 383template <class T, class D> 384 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 385template <class T, class D> 386 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 387 388class bad_weak_ptr 389 : public std::exception 390{ 391 bad_weak_ptr() noexcept; 392}; 393 394template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 395template<class T> unique_ptr<T> make_unique(size_t n); // C++14 396template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 397 398template<class E, class T, class Y, class D> 399 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); 400 401template<class T> 402class shared_ptr 403{ 404public: 405 typedef T element_type; 406 typedef weak_ptr<T> weak_type; // C++17 407 408 // constructors: 409 constexpr shared_ptr() noexcept; 410 template<class Y> explicit shared_ptr(Y* p); 411 template<class Y, class D> shared_ptr(Y* p, D d); 412 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 413 template <class D> shared_ptr(nullptr_t p, D d); 414 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 415 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 416 shared_ptr(const shared_ptr& r) noexcept; 417 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 418 shared_ptr(shared_ptr&& r) noexcept; 419 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 420 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 421 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 422 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 423 shared_ptr(nullptr_t) : shared_ptr() { } 424 425 // destructor: 426 ~shared_ptr(); 427 428 // assignment: 429 shared_ptr& operator=(const shared_ptr& r) noexcept; 430 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 431 shared_ptr& operator=(shared_ptr&& r) noexcept; 432 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 433 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 434 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 435 436 // modifiers: 437 void swap(shared_ptr& r) noexcept; 438 void reset() noexcept; 439 template<class Y> void reset(Y* p); 440 template<class Y, class D> void reset(Y* p, D d); 441 template<class Y, class D, class A> void reset(Y* p, D d, A a); 442 443 // observers: 444 T* get() const noexcept; 445 T& operator*() const noexcept; 446 T* operator->() const noexcept; 447 long use_count() const noexcept; 448 bool unique() const noexcept; 449 explicit operator bool() const noexcept; 450 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 451 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 452}; 453 454template<class T> 455shared_ptr(weak_ptr<T>) -> shared_ptr<T>; 456template<class T, class D> 457shared_ptr(unique_ptr<T, D>) -> shared_ptr<T>; 458 459// shared_ptr comparisons: 460template<class T, class U> 461 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 462template<class T, class U> 463 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 464template<class T, class U> 465 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 466template<class T, class U> 467 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 468template<class T, class U> 469 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 470template<class T, class U> 471 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 472 473template <class T> 474 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; 475template <class T> 476 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; 477template <class T> 478 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; 479template <class T> 480 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; 481template <class T> 482 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; 483template <class T> 484bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 485template <class T> 486 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 487template <class T> 488 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 489template <class T> 490 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 491template <class T> 492 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 493template <class T> 494 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 495template <class T> 496 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 497 498// shared_ptr specialized algorithms: 499template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 500 501// shared_ptr casts: 502template<class T, class U> 503 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 504template<class T, class U> 505 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 506template<class T, class U> 507 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 508 509// shared_ptr I/O: 510template<class E, class T, class Y> 511 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 512 513// shared_ptr get_deleter: 514template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 515 516template<class T, class... Args> 517 shared_ptr<T> make_shared(Args&&... args); 518template<class T, class A, class... Args> 519 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 520 521template<class T> 522class weak_ptr 523{ 524public: 525 typedef T element_type; 526 527 // constructors 528 constexpr weak_ptr() noexcept; 529 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 530 weak_ptr(weak_ptr const& r) noexcept; 531 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 532 weak_ptr(weak_ptr&& r) noexcept; // C++14 533 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 534 535 // destructor 536 ~weak_ptr(); 537 538 // assignment 539 weak_ptr& operator=(weak_ptr const& r) noexcept; 540 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 541 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 542 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 543 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 544 545 // modifiers 546 void swap(weak_ptr& r) noexcept; 547 void reset() noexcept; 548 549 // observers 550 long use_count() const noexcept; 551 bool expired() const noexcept; 552 shared_ptr<T> lock() const noexcept; 553 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 554 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 555}; 556 557template<class T> 558weak_ptr(shared_ptr<T>) -> weak_ptr<T>; 559 560// weak_ptr specialized algorithms: 561template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 562 563// class owner_less: 564template<class T> struct owner_less; 565 566template<class T> 567struct owner_less<shared_ptr<T> > 568 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 569{ 570 typedef bool result_type; 571 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 572 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 573 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 574}; 575 576template<class T> 577struct owner_less<weak_ptr<T> > 578 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 579{ 580 typedef bool result_type; 581 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 582 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 583 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 584}; 585 586template <> // Added in C++14 587struct owner_less<void> 588{ 589 template <class _Tp, class _Up> 590 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 591 template <class _Tp, class _Up> 592 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 593 template <class _Tp, class _Up> 594 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 595 template <class _Tp, class _Up> 596 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 597 598 typedef void is_transparent; 599}; 600 601template<class T> 602class enable_shared_from_this 603{ 604protected: 605 constexpr enable_shared_from_this() noexcept; 606 enable_shared_from_this(enable_shared_from_this const&) noexcept; 607 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 608 ~enable_shared_from_this(); 609public: 610 shared_ptr<T> shared_from_this(); 611 shared_ptr<T const> shared_from_this() const; 612}; 613 614template<class T> 615 bool atomic_is_lock_free(const shared_ptr<T>* p); 616template<class T> 617 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 618template<class T> 619 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 620template<class T> 621 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 622template<class T> 623 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 624template<class T> 625 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 626template<class T> 627 shared_ptr<T> 628 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 629template<class T> 630 bool 631 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 632template<class T> 633 bool 634 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 635template<class T> 636 bool 637 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 638 shared_ptr<T> w, memory_order success, 639 memory_order failure); 640template<class T> 641 bool 642 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 643 shared_ptr<T> w, memory_order success, 644 memory_order failure); 645// Hash support 646template <class T> struct hash; 647template <class T, class D> struct hash<unique_ptr<T, D> >; 648template <class T> struct hash<shared_ptr<T> >; 649 650template <class T, class Alloc> 651 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; 652 653// Pointer safety 654enum class pointer_safety { relaxed, preferred, strict }; 655void declare_reachable(void *p); 656template <class T> T *undeclare_reachable(T *p); 657void declare_no_pointers(char *p, size_t n); 658void undeclare_no_pointers(char *p, size_t n); 659pointer_safety get_pointer_safety() noexcept; 660 661void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 662 663} // std 664 665*/ 666 667#include <__config> 668#include <__availability> 669#include <type_traits> 670#include <typeinfo> 671#include <cstddef> 672#include <cstdint> 673#include <new> 674#include <utility> 675#include <limits> 676#include <iterator> 677#include <__functional_base> 678#include <iosfwd> 679#include <tuple> 680#include <stdexcept> 681#include <cstring> 682#include <__memory/allocator_traits.h> 683#include <__memory/base.h> 684#include <__memory/pointer_traits.h> 685#include <__memory/utilities.h> 686#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 687# include <atomic> 688#endif 689#include <version> 690 691#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 692#pragma GCC system_header 693#endif 694 695_LIBCPP_PUSH_MACROS 696#include <__undef_macros> 697 698 699_LIBCPP_BEGIN_NAMESPACE_STD 700 701template <class _ValueType> 702inline _LIBCPP_INLINE_VISIBILITY 703_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 704#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 705 defined(__ATOMIC_RELAXED) && \ 706 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 707 return __atomic_load_n(__value, __ATOMIC_RELAXED); 708#else 709 return *__value; 710#endif 711} 712 713template <class _ValueType> 714inline _LIBCPP_INLINE_VISIBILITY 715_ValueType __libcpp_acquire_load(_ValueType const* __value) { 716#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 717 defined(__ATOMIC_ACQUIRE) && \ 718 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 719 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 720#else 721 return *__value; 722#endif 723} 724 725template <bool _UsePointerTraits> struct __to_address_helper; 726 727template <> struct __to_address_helper<true> { 728 template <class _Pointer> 729 using __return_type = decltype(pointer_traits<_Pointer>::to_address(_VSTD::declval<const _Pointer&>())); 730 731 template <class _Pointer> 732 _LIBCPP_CONSTEXPR 733 static __return_type<_Pointer> 734 __do_it(const _Pointer &__p) _NOEXCEPT { return pointer_traits<_Pointer>::to_address(__p); } 735}; 736 737template <class _Pointer, bool _Dummy = true> 738using __choose_to_address = __to_address_helper<_IsValidExpansion<__to_address_helper<_Dummy>::template __return_type, _Pointer>::value>; 739 740 741template <class _Tp> 742inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 743_Tp* 744__to_address(_Tp* __p) _NOEXCEPT 745{ 746 static_assert(!is_function<_Tp>::value, "_Tp is a function type"); 747 return __p; 748} 749 750template <class _Pointer> 751inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 752typename __choose_to_address<_Pointer>::template __return_type<_Pointer> 753__to_address(const _Pointer& __p) _NOEXCEPT { 754 return __choose_to_address<_Pointer>::__do_it(__p); 755} 756 757template <> struct __to_address_helper<false> { 758 template <class _Pointer> 759 using __return_type = typename pointer_traits<_Pointer>::element_type*; 760 761 template <class _Pointer> 762 _LIBCPP_CONSTEXPR 763 static __return_type<_Pointer> 764 __do_it(const _Pointer &__p) _NOEXCEPT { return _VSTD::__to_address(__p.operator->()); } 765}; 766 767 768#if _LIBCPP_STD_VER > 17 769template <class _Tp> 770inline _LIBCPP_INLINE_VISIBILITY constexpr 771_Tp* 772to_address(_Tp* __p) _NOEXCEPT 773{ 774 static_assert(!is_function_v<_Tp>, "_Tp is a function type"); 775 return __p; 776} 777 778template <class _Pointer> 779inline _LIBCPP_INLINE_VISIBILITY constexpr 780auto 781to_address(const _Pointer& __p) _NOEXCEPT 782{ 783 return _VSTD::__to_address(__p); 784} 785#endif 786 787template <class _Tp> class allocator; 788 789#if _LIBCPP_STD_VER <= 17 790template <> 791class _LIBCPP_TEMPLATE_VIS allocator<void> 792{ 793public: 794 _LIBCPP_DEPRECATED_IN_CXX17 typedef void* pointer; 795 _LIBCPP_DEPRECATED_IN_CXX17 typedef const void* const_pointer; 796 _LIBCPP_DEPRECATED_IN_CXX17 typedef void value_type; 797 798 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 799}; 800 801template <> 802class _LIBCPP_TEMPLATE_VIS allocator<const void> 803{ 804public: 805 _LIBCPP_DEPRECATED_IN_CXX17 typedef const void* pointer; 806 _LIBCPP_DEPRECATED_IN_CXX17 typedef const void* const_pointer; 807 _LIBCPP_DEPRECATED_IN_CXX17 typedef const void value_type; 808 809 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 810}; 811#endif 812 813// allocator 814 815template <class _Tp> 816class _LIBCPP_TEMPLATE_VIS allocator 817{ 818public: 819 typedef size_t size_type; 820 typedef ptrdiff_t difference_type; 821 typedef _Tp value_type; 822 typedef true_type propagate_on_container_move_assignment; 823 typedef true_type is_always_equal; 824 825 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 826 allocator() _NOEXCEPT { } 827 828 template <class _Up> 829 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 830 allocator(const allocator<_Up>&) _NOEXCEPT { } 831 832 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 833 _Tp* allocate(size_t __n) { 834 if (__n > allocator_traits<allocator>::max_size(*this)) 835 __throw_length_error("allocator<T>::allocate(size_t n)" 836 " 'n' exceeds maximum supported size"); 837 if (__libcpp_is_constant_evaluated()) { 838 return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp))); 839 } else { 840 return static_cast<_Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 841 } 842 } 843 844 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 845 void deallocate(_Tp* __p, size_t __n) _NOEXCEPT { 846 if (__libcpp_is_constant_evaluated()) { 847 ::operator delete(__p); 848 } else { 849 _VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 850 } 851 } 852 853 // C++20 Removed members 854#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 855 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp* pointer; 856 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 857 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp& reference; 858 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 859 860 template <class _Up> 861 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 862 typedef allocator<_Up> other; 863 }; 864 865 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 866 pointer address(reference __x) const _NOEXCEPT { 867 return _VSTD::addressof(__x); 868 } 869 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 870 const_pointer address(const_reference __x) const _NOEXCEPT { 871 return _VSTD::addressof(__x); 872 } 873 874 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 875 _Tp* allocate(size_t __n, const void*) { 876 return allocate(__n); 877 } 878 879 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 880 return size_type(~0) / sizeof(_Tp); 881 } 882 883 template <class _Up, class... _Args> 884 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 885 void construct(_Up* __p, _Args&&... __args) { 886 ::new ((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 887 } 888 889 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 890 void destroy(pointer __p) { 891 __p->~_Tp(); 892 } 893#endif 894}; 895 896template <class _Tp> 897class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 898{ 899public: 900 typedef size_t size_type; 901 typedef ptrdiff_t difference_type; 902 typedef const _Tp value_type; 903 typedef true_type propagate_on_container_move_assignment; 904 typedef true_type is_always_equal; 905 906 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 907 allocator() _NOEXCEPT { } 908 909 template <class _Up> 910 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 911 allocator(const allocator<_Up>&) _NOEXCEPT { } 912 913 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 914 const _Tp* allocate(size_t __n) { 915 if (__n > allocator_traits<allocator>::max_size(*this)) 916 __throw_length_error("allocator<const T>::allocate(size_t n)" 917 " 'n' exceeds maximum supported size"); 918 if (__libcpp_is_constant_evaluated()) { 919 return static_cast<const _Tp*>(::operator new(__n * sizeof(_Tp))); 920 } else { 921 return static_cast<const _Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 922 } 923 } 924 925 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 926 void deallocate(const _Tp* __p, size_t __n) { 927 if (__libcpp_is_constant_evaluated()) { 928 ::operator delete(const_cast<_Tp*>(__p)); 929 } else { 930 _VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 931 } 932 } 933 934 // C++20 Removed members 935#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 936 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* pointer; 937 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 938 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& reference; 939 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 940 941 template <class _Up> 942 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 943 typedef allocator<_Up> other; 944 }; 945 946 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 947 const_pointer address(const_reference __x) const _NOEXCEPT { 948 return _VSTD::addressof(__x); 949 } 950 951 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 952 const _Tp* allocate(size_t __n, const void*) { 953 return allocate(__n); 954 } 955 956 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 957 return size_type(~0) / sizeof(_Tp); 958 } 959 960 template <class _Up, class... _Args> 961 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 962 void construct(_Up* __p, _Args&&... __args) { 963 ::new ((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 964 } 965 966 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 967 void destroy(pointer __p) { 968 __p->~_Tp(); 969 } 970#endif 971}; 972 973template <class _Tp, class _Up> 974inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 975bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 976 977template <class _Tp, class _Up> 978inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 979bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 980 981template <class _Alloc, class _Ptr> 982_LIBCPP_INLINE_VISIBILITY 983void __construct_forward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) { 984 static_assert(__is_cpp17_move_insertable<_Alloc>::value, 985 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 986 typedef allocator_traits<_Alloc> _Traits; 987 for (; __begin1 != __end1; ++__begin1, (void)++__begin2) { 988 _Traits::construct(__a, _VSTD::__to_address(__begin2), 989#ifdef _LIBCPP_NO_EXCEPTIONS 990 _VSTD::move(*__begin1) 991#else 992 _VSTD::move_if_noexcept(*__begin1) 993#endif 994 ); 995 } 996} 997 998template <class _Alloc, class _Tp, typename enable_if< 999 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && 1000 is_trivially_move_constructible<_Tp>::value 1001>::type> 1002_LIBCPP_INLINE_VISIBILITY 1003void __construct_forward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) { 1004 ptrdiff_t _Np = __end1 - __begin1; 1005 if (_Np > 0) { 1006 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1007 __begin2 += _Np; 1008 } 1009} 1010 1011template <class _Alloc, class _Iter, class _Ptr> 1012_LIBCPP_INLINE_VISIBILITY 1013void __construct_range_forward(_Alloc& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) { 1014 typedef allocator_traits<_Alloc> _Traits; 1015 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) { 1016 _Traits::construct(__a, _VSTD::__to_address(__begin2), *__begin1); 1017 } 1018} 1019 1020template <class _Alloc, class _Source, class _Dest, 1021 class _RawSource = typename remove_const<_Source>::type, 1022 class _RawDest = typename remove_const<_Dest>::type, 1023 class = 1024 typename enable_if< 1025 is_trivially_copy_constructible<_Dest>::value && 1026 is_same<_RawSource, _RawDest>::value && 1027 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Dest*, _Source&>::value) 1028 >::type> 1029_LIBCPP_INLINE_VISIBILITY 1030void __construct_range_forward(_Alloc&, _Source* __begin1, _Source* __end1, _Dest*& __begin2) { 1031 ptrdiff_t _Np = __end1 - __begin1; 1032 if (_Np > 0) { 1033 _VSTD::memcpy(const_cast<_RawDest*>(__begin2), __begin1, _Np * sizeof(_Dest)); 1034 __begin2 += _Np; 1035 } 1036} 1037 1038template <class _Alloc, class _Ptr> 1039_LIBCPP_INLINE_VISIBILITY 1040void __construct_backward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) { 1041 static_assert(__is_cpp17_move_insertable<_Alloc>::value, 1042 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 1043 typedef allocator_traits<_Alloc> _Traits; 1044 while (__end1 != __begin1) { 1045 _Traits::construct(__a, _VSTD::__to_address(__end2 - 1), 1046#ifdef _LIBCPP_NO_EXCEPTIONS 1047 _VSTD::move(*--__end1) 1048#else 1049 _VSTD::move_if_noexcept(*--__end1) 1050#endif 1051 ); 1052 --__end2; 1053 } 1054} 1055 1056template <class _Alloc, class _Tp, class = typename enable_if< 1057 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && 1058 is_trivially_move_constructible<_Tp>::value 1059>::type> 1060_LIBCPP_INLINE_VISIBILITY 1061void __construct_backward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) { 1062 ptrdiff_t _Np = __end1 - __begin1; 1063 __end2 -= _Np; 1064 if (_Np > 0) 1065 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1066} 1067 1068template <class _OutputIterator, class _Tp> 1069class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1070 : public iterator<output_iterator_tag, 1071 _Tp, // purposefully not C++03 1072 ptrdiff_t, // purposefully not C++03 1073 _Tp*, // purposefully not C++03 1074 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1075{ 1076private: 1077 _OutputIterator __x_; 1078public: 1079 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 1080 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 1081 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 1082 {::new ((void*)_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 1083#if _LIBCPP_STD_VER >= 14 1084 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 1085 {::new ((void*)_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 1086#endif 1087 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 1088 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 1089 {raw_storage_iterator __t(*this); ++__x_; return __t;} 1090#if _LIBCPP_STD_VER >= 14 1091 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 1092#endif 1093}; 1094 1095template <class _Tp> 1096_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 1097pair<_Tp*, ptrdiff_t> 1098get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 1099{ 1100 pair<_Tp*, ptrdiff_t> __r(0, 0); 1101 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 1102 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 1103 / sizeof(_Tp); 1104 if (__n > __m) 1105 __n = __m; 1106 while (__n > 0) 1107 { 1108#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 1109 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1110 { 1111 align_val_t __al = 1112 align_val_t(alignment_of<_Tp>::value); 1113 __r.first = static_cast<_Tp*>(::operator new( 1114 __n * sizeof(_Tp), __al, nothrow)); 1115 } else { 1116 __r.first = static_cast<_Tp*>(::operator new( 1117 __n * sizeof(_Tp), nothrow)); 1118 } 1119#else 1120 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1121 { 1122 // Since aligned operator new is unavailable, return an empty 1123 // buffer rather than one with invalid alignment. 1124 return __r; 1125 } 1126 1127 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 1128#endif 1129 1130 if (__r.first) 1131 { 1132 __r.second = __n; 1133 break; 1134 } 1135 __n /= 2; 1136 } 1137 return __r; 1138} 1139 1140template <class _Tp> 1141inline _LIBCPP_INLINE_VISIBILITY 1142void return_temporary_buffer(_Tp* __p) _NOEXCEPT 1143{ 1144 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 1145} 1146 1147#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1148template <class _Tp> 1149struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 1150{ 1151 _Tp* __ptr_; 1152}; 1153 1154template<class _Tp> 1155class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 1156{ 1157private: 1158 _Tp* __ptr_; 1159public: 1160 typedef _Tp element_type; 1161 1162 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} 1163 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 1164 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 1165 : __ptr_(__p.release()) {} 1166 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 1167 {reset(__p.release()); return *this;} 1168 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 1169 {reset(__p.release()); return *this;} 1170 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 1171 {reset(__p.__ptr_); return *this;} 1172 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 1173 1174 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 1175 {return *__ptr_;} 1176 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} 1177 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} 1178 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 1179 { 1180 _Tp* __t = __ptr_; 1181 __ptr_ = nullptr; 1182 return __t; 1183 } 1184 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 1185 { 1186 if (__ptr_ != __p) 1187 delete __ptr_; 1188 __ptr_ = __p; 1189 } 1190 1191 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 1192 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 1193 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 1194 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 1195 {return auto_ptr<_Up>(release());} 1196}; 1197 1198template <> 1199class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 1200{ 1201public: 1202 typedef void element_type; 1203}; 1204#endif 1205 1206// Tag used to default initialize one or both of the pair's elements. 1207struct __default_init_tag {}; 1208struct __value_init_tag {}; 1209 1210template <class _Tp, int _Idx, 1211 bool _CanBeEmptyBase = 1212 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 1213struct __compressed_pair_elem { 1214 typedef _Tp _ParamT; 1215 typedef _Tp& reference; 1216 typedef const _Tp& const_reference; 1217 1218 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1219 __compressed_pair_elem(__default_init_tag) {} 1220 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1221 __compressed_pair_elem(__value_init_tag) : __value_() {} 1222 1223 template <class _Up, class = typename enable_if< 1224 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 1225 >::type> 1226 _LIBCPP_INLINE_VISIBILITY 1227 _LIBCPP_CONSTEXPR explicit 1228 __compressed_pair_elem(_Up&& __u) 1229 : __value_(_VSTD::forward<_Up>(__u)) 1230 { 1231 } 1232 1233 1234#ifndef _LIBCPP_CXX03_LANG 1235 template <class... _Args, size_t... _Indexes> 1236 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1237 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 1238 __tuple_indices<_Indexes...>) 1239 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 1240#endif 1241 1242 1243 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 1244 _LIBCPP_INLINE_VISIBILITY 1245 const_reference __get() const _NOEXCEPT { return __value_; } 1246 1247private: 1248 _Tp __value_; 1249}; 1250 1251template <class _Tp, int _Idx> 1252struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 1253 typedef _Tp _ParamT; 1254 typedef _Tp& reference; 1255 typedef const _Tp& const_reference; 1256 typedef _Tp __value_type; 1257 1258 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __compressed_pair_elem() = default; 1259 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1260 __compressed_pair_elem(__default_init_tag) {} 1261 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1262 __compressed_pair_elem(__value_init_tag) : __value_type() {} 1263 1264 template <class _Up, class = typename enable_if< 1265 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 1266 >::type> 1267 _LIBCPP_INLINE_VISIBILITY 1268 _LIBCPP_CONSTEXPR explicit 1269 __compressed_pair_elem(_Up&& __u) 1270 : __value_type(_VSTD::forward<_Up>(__u)) 1271 {} 1272 1273#ifndef _LIBCPP_CXX03_LANG 1274 template <class... _Args, size_t... _Indexes> 1275 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1276 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 1277 __tuple_indices<_Indexes...>) 1278 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 1279#endif 1280 1281 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 1282 _LIBCPP_INLINE_VISIBILITY 1283 const_reference __get() const _NOEXCEPT { return *this; } 1284}; 1285 1286template <class _T1, class _T2> 1287class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 1288 private __compressed_pair_elem<_T2, 1> { 1289public: 1290 // NOTE: This static assert should never fire because __compressed_pair 1291 // is *almost never* used in a scenario where it's possible for T1 == T2. 1292 // (The exception is std::function where it is possible that the function 1293 // object and the allocator have the same type). 1294 static_assert((!is_same<_T1, _T2>::value), 1295 "__compressed_pair cannot be instantiated when T1 and T2 are the same type; " 1296 "The current implementation is NOT ABI-compatible with the previous " 1297 "implementation for this configuration"); 1298 1299 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 1300 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 1301 1302 template <bool _Dummy = true, 1303 class = typename enable_if< 1304 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 1305 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 1306 >::type 1307 > 1308 _LIBCPP_INLINE_VISIBILITY 1309 _LIBCPP_CONSTEXPR __compressed_pair() : _Base1(__value_init_tag()), _Base2(__value_init_tag()) {} 1310 1311 template <class _U1, class _U2> 1312 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1313 __compressed_pair(_U1&& __t1, _U2&& __t2) 1314 : _Base1(_VSTD::forward<_U1>(__t1)), _Base2(_VSTD::forward<_U2>(__t2)) {} 1315 1316#ifndef _LIBCPP_CXX03_LANG 1317 template <class... _Args1, class... _Args2> 1318 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1319 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 1320 tuple<_Args2...> __second_args) 1321 : _Base1(__pc, _VSTD::move(__first_args), 1322 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 1323 _Base2(__pc, _VSTD::move(__second_args), 1324 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 1325#endif 1326 1327 _LIBCPP_INLINE_VISIBILITY 1328 typename _Base1::reference first() _NOEXCEPT { 1329 return static_cast<_Base1&>(*this).__get(); 1330 } 1331 1332 _LIBCPP_INLINE_VISIBILITY 1333 typename _Base1::const_reference first() const _NOEXCEPT { 1334 return static_cast<_Base1 const&>(*this).__get(); 1335 } 1336 1337 _LIBCPP_INLINE_VISIBILITY 1338 typename _Base2::reference second() _NOEXCEPT { 1339 return static_cast<_Base2&>(*this).__get(); 1340 } 1341 1342 _LIBCPP_INLINE_VISIBILITY 1343 typename _Base2::const_reference second() const _NOEXCEPT { 1344 return static_cast<_Base2 const&>(*this).__get(); 1345 } 1346 1347 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1348 static _Base1* __get_first_base(__compressed_pair* __pair) _NOEXCEPT { 1349 return static_cast<_Base1*>(__pair); 1350 } 1351 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1352 static _Base2* __get_second_base(__compressed_pair* __pair) _NOEXCEPT { 1353 return static_cast<_Base2*>(__pair); 1354 } 1355 1356 _LIBCPP_INLINE_VISIBILITY 1357 void swap(__compressed_pair& __x) 1358 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 1359 __is_nothrow_swappable<_T2>::value) 1360 { 1361 using _VSTD::swap; 1362 swap(first(), __x.first()); 1363 swap(second(), __x.second()); 1364 } 1365}; 1366 1367template <class _T1, class _T2> 1368inline _LIBCPP_INLINE_VISIBILITY 1369void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 1370 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 1371 __is_nothrow_swappable<_T2>::value) { 1372 __x.swap(__y); 1373} 1374 1375// default_delete 1376 1377template <class _Tp> 1378struct _LIBCPP_TEMPLATE_VIS default_delete { 1379 static_assert(!is_function<_Tp>::value, 1380 "default_delete cannot be instantiated for function types"); 1381#ifndef _LIBCPP_CXX03_LANG 1382 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 1383#else 1384 _LIBCPP_INLINE_VISIBILITY default_delete() {} 1385#endif 1386 template <class _Up> 1387 _LIBCPP_INLINE_VISIBILITY 1388 default_delete(const default_delete<_Up>&, 1389 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 1390 0) _NOEXCEPT {} 1391 1392 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 1393 static_assert(sizeof(_Tp) > 0, 1394 "default_delete can not delete incomplete type"); 1395 static_assert(!is_void<_Tp>::value, 1396 "default_delete can not delete incomplete type"); 1397 delete __ptr; 1398 } 1399}; 1400 1401template <class _Tp> 1402struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 1403private: 1404 template <class _Up> 1405 struct _EnableIfConvertible 1406 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 1407 1408public: 1409#ifndef _LIBCPP_CXX03_LANG 1410 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 1411#else 1412 _LIBCPP_INLINE_VISIBILITY default_delete() {} 1413#endif 1414 1415 template <class _Up> 1416 _LIBCPP_INLINE_VISIBILITY 1417 default_delete(const default_delete<_Up[]>&, 1418 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 1419 1420 template <class _Up> 1421 _LIBCPP_INLINE_VISIBILITY 1422 typename _EnableIfConvertible<_Up>::type 1423 operator()(_Up* __ptr) const _NOEXCEPT { 1424 static_assert(sizeof(_Tp) > 0, 1425 "default_delete can not delete incomplete type"); 1426 static_assert(!is_void<_Tp>::value, 1427 "default_delete can not delete void type"); 1428 delete[] __ptr; 1429 } 1430}; 1431 1432template <class _Deleter> 1433struct __unique_ptr_deleter_sfinae { 1434 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 1435 typedef const _Deleter& __lval_ref_type; 1436 typedef _Deleter&& __good_rval_ref_type; 1437 typedef true_type __enable_rval_overload; 1438}; 1439 1440template <class _Deleter> 1441struct __unique_ptr_deleter_sfinae<_Deleter const&> { 1442 typedef const _Deleter& __lval_ref_type; 1443 typedef const _Deleter&& __bad_rval_ref_type; 1444 typedef false_type __enable_rval_overload; 1445}; 1446 1447template <class _Deleter> 1448struct __unique_ptr_deleter_sfinae<_Deleter&> { 1449 typedef _Deleter& __lval_ref_type; 1450 typedef _Deleter&& __bad_rval_ref_type; 1451 typedef false_type __enable_rval_overload; 1452}; 1453 1454#if defined(_LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI) 1455# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 1456#else 1457# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI 1458#endif 1459 1460template <class _Tp, class _Dp = default_delete<_Tp> > 1461class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr { 1462public: 1463 typedef _Tp element_type; 1464 typedef _Dp deleter_type; 1465 typedef _LIBCPP_NODEBUG_TYPE typename __pointer<_Tp, deleter_type>::type pointer; 1466 1467 static_assert(!is_rvalue_reference<deleter_type>::value, 1468 "the specified deleter type cannot be an rvalue reference"); 1469 1470private: 1471 __compressed_pair<pointer, deleter_type> __ptr_; 1472 1473 struct __nat { int __for_bool_; }; 1474 1475 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 1476 1477 template <bool _Dummy> 1478 using _LValRefType _LIBCPP_NODEBUG_TYPE = 1479 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 1480 1481 template <bool _Dummy> 1482 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 1483 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 1484 1485 template <bool _Dummy> 1486 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 1487 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 1488 1489 template <bool _Dummy, class _Deleter = typename __dependent_type< 1490 __identity<deleter_type>, _Dummy>::type> 1491 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 1492 typename enable_if<is_default_constructible<_Deleter>::value && 1493 !is_pointer<_Deleter>::value>::type; 1494 1495 template <class _ArgType> 1496 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 1497 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 1498 1499 template <class _UPtr, class _Up> 1500 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1501 is_convertible<typename _UPtr::pointer, pointer>::value && 1502 !is_array<_Up>::value 1503 >::type; 1504 1505 template <class _UDel> 1506 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1507 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 1508 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 1509 >::type; 1510 1511 template <class _UDel> 1512 using _EnableIfDeleterAssignable = typename enable_if< 1513 is_assignable<_Dp&, _UDel&&>::value 1514 >::type; 1515 1516public: 1517 template <bool _Dummy = true, 1518 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1519 _LIBCPP_INLINE_VISIBILITY 1520 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1521 1522 template <bool _Dummy = true, 1523 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1524 _LIBCPP_INLINE_VISIBILITY 1525 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1526 1527 template <bool _Dummy = true, 1528 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1529 _LIBCPP_INLINE_VISIBILITY 1530 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p, __default_init_tag()) {} 1531 1532 template <bool _Dummy = true, 1533 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 1534 _LIBCPP_INLINE_VISIBILITY 1535 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 1536 : __ptr_(__p, __d) {} 1537 1538 template <bool _Dummy = true, 1539 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 1540 _LIBCPP_INLINE_VISIBILITY 1541 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1542 : __ptr_(__p, _VSTD::move(__d)) { 1543 static_assert(!is_reference<deleter_type>::value, 1544 "rvalue deleter bound to reference"); 1545 } 1546 1547 template <bool _Dummy = true, 1548 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 1549 _LIBCPP_INLINE_VISIBILITY 1550 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 1551 1552 _LIBCPP_INLINE_VISIBILITY 1553 unique_ptr(unique_ptr&& __u) _NOEXCEPT 1554 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 1555 } 1556 1557 template <class _Up, class _Ep, 1558 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1559 class = _EnableIfDeleterConvertible<_Ep> 1560 > 1561 _LIBCPP_INLINE_VISIBILITY 1562 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 1563 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 1564 1565#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1566 template <class _Up> 1567 _LIBCPP_INLINE_VISIBILITY 1568 unique_ptr(auto_ptr<_Up>&& __p, 1569 typename enable_if<is_convertible<_Up*, _Tp*>::value && 1570 is_same<_Dp, default_delete<_Tp> >::value, 1571 __nat>::type = __nat()) _NOEXCEPT 1572 : __ptr_(__p.release(), __default_init_tag()) {} 1573#endif 1574 1575 _LIBCPP_INLINE_VISIBILITY 1576 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 1577 reset(__u.release()); 1578 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 1579 return *this; 1580 } 1581 1582 template <class _Up, class _Ep, 1583 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1584 class = _EnableIfDeleterAssignable<_Ep> 1585 > 1586 _LIBCPP_INLINE_VISIBILITY 1587 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 1588 reset(__u.release()); 1589 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 1590 return *this; 1591 } 1592 1593#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1594 template <class _Up> 1595 _LIBCPP_INLINE_VISIBILITY 1596 typename enable_if<is_convertible<_Up*, _Tp*>::value && 1597 is_same<_Dp, default_delete<_Tp> >::value, 1598 unique_ptr&>::type 1599 operator=(auto_ptr<_Up> __p) { 1600 reset(__p.release()); 1601 return *this; 1602 } 1603#endif 1604 1605#ifdef _LIBCPP_CXX03_LANG 1606 unique_ptr(unique_ptr const&) = delete; 1607 unique_ptr& operator=(unique_ptr const&) = delete; 1608#endif 1609 1610 1611 _LIBCPP_INLINE_VISIBILITY 1612 ~unique_ptr() { reset(); } 1613 1614 _LIBCPP_INLINE_VISIBILITY 1615 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 1616 reset(); 1617 return *this; 1618 } 1619 1620 _LIBCPP_INLINE_VISIBILITY 1621 typename add_lvalue_reference<_Tp>::type 1622 operator*() const { 1623 return *__ptr_.first(); 1624 } 1625 _LIBCPP_INLINE_VISIBILITY 1626 pointer operator->() const _NOEXCEPT { 1627 return __ptr_.first(); 1628 } 1629 _LIBCPP_INLINE_VISIBILITY 1630 pointer get() const _NOEXCEPT { 1631 return __ptr_.first(); 1632 } 1633 _LIBCPP_INLINE_VISIBILITY 1634 deleter_type& get_deleter() _NOEXCEPT { 1635 return __ptr_.second(); 1636 } 1637 _LIBCPP_INLINE_VISIBILITY 1638 const deleter_type& get_deleter() const _NOEXCEPT { 1639 return __ptr_.second(); 1640 } 1641 _LIBCPP_INLINE_VISIBILITY 1642 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 1643 return __ptr_.first() != nullptr; 1644 } 1645 1646 _LIBCPP_INLINE_VISIBILITY 1647 pointer release() _NOEXCEPT { 1648 pointer __t = __ptr_.first(); 1649 __ptr_.first() = pointer(); 1650 return __t; 1651 } 1652 1653 _LIBCPP_INLINE_VISIBILITY 1654 void reset(pointer __p = pointer()) _NOEXCEPT { 1655 pointer __tmp = __ptr_.first(); 1656 __ptr_.first() = __p; 1657 if (__tmp) 1658 __ptr_.second()(__tmp); 1659 } 1660 1661 _LIBCPP_INLINE_VISIBILITY 1662 void swap(unique_ptr& __u) _NOEXCEPT { 1663 __ptr_.swap(__u.__ptr_); 1664 } 1665}; 1666 1667 1668template <class _Tp, class _Dp> 1669class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 1670public: 1671 typedef _Tp element_type; 1672 typedef _Dp deleter_type; 1673 typedef typename __pointer<_Tp, deleter_type>::type pointer; 1674 1675private: 1676 __compressed_pair<pointer, deleter_type> __ptr_; 1677 1678 template <class _From> 1679 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 1680 1681 template <class _FromElem> 1682 struct _CheckArrayPointerConversion<_FromElem*> 1683 : integral_constant<bool, 1684 is_same<_FromElem*, pointer>::value || 1685 (is_same<pointer, element_type*>::value && 1686 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 1687 > 1688 {}; 1689 1690 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 1691 1692 template <bool _Dummy> 1693 using _LValRefType _LIBCPP_NODEBUG_TYPE = 1694 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 1695 1696 template <bool _Dummy> 1697 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 1698 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 1699 1700 template <bool _Dummy> 1701 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 1702 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 1703 1704 template <bool _Dummy, class _Deleter = typename __dependent_type< 1705 __identity<deleter_type>, _Dummy>::type> 1706 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 1707 typename enable_if<is_default_constructible<_Deleter>::value && 1708 !is_pointer<_Deleter>::value>::type; 1709 1710 template <class _ArgType> 1711 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 1712 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 1713 1714 template <class _Pp> 1715 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1716 _CheckArrayPointerConversion<_Pp>::value 1717 >::type; 1718 1719 template <class _UPtr, class _Up, 1720 class _ElemT = typename _UPtr::element_type> 1721 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1722 is_array<_Up>::value && 1723 is_same<pointer, element_type*>::value && 1724 is_same<typename _UPtr::pointer, _ElemT*>::value && 1725 is_convertible<_ElemT(*)[], element_type(*)[]>::value 1726 >::type; 1727 1728 template <class _UDel> 1729 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1730 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 1731 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 1732 >::type; 1733 1734 template <class _UDel> 1735 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 1736 is_assignable<_Dp&, _UDel&&>::value 1737 >::type; 1738 1739public: 1740 template <bool _Dummy = true, 1741 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1742 _LIBCPP_INLINE_VISIBILITY 1743 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1744 1745 template <bool _Dummy = true, 1746 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1747 _LIBCPP_INLINE_VISIBILITY 1748 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1749 1750 template <class _Pp, bool _Dummy = true, 1751 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 1752 class = _EnableIfPointerConvertible<_Pp> > 1753 _LIBCPP_INLINE_VISIBILITY 1754 explicit unique_ptr(_Pp __p) _NOEXCEPT 1755 : __ptr_(__p, __default_init_tag()) {} 1756 1757 template <class _Pp, bool _Dummy = true, 1758 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 1759 class = _EnableIfPointerConvertible<_Pp> > 1760 _LIBCPP_INLINE_VISIBILITY 1761 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 1762 : __ptr_(__p, __d) {} 1763 1764 template <bool _Dummy = true, 1765 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 1766 _LIBCPP_INLINE_VISIBILITY 1767 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 1768 : __ptr_(nullptr, __d) {} 1769 1770 template <class _Pp, bool _Dummy = true, 1771 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 1772 class = _EnableIfPointerConvertible<_Pp> > 1773 _LIBCPP_INLINE_VISIBILITY 1774 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1775 : __ptr_(__p, _VSTD::move(__d)) { 1776 static_assert(!is_reference<deleter_type>::value, 1777 "rvalue deleter bound to reference"); 1778 } 1779 1780 template <bool _Dummy = true, 1781 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 1782 _LIBCPP_INLINE_VISIBILITY 1783 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1784 : __ptr_(nullptr, _VSTD::move(__d)) { 1785 static_assert(!is_reference<deleter_type>::value, 1786 "rvalue deleter bound to reference"); 1787 } 1788 1789 template <class _Pp, bool _Dummy = true, 1790 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 1791 class = _EnableIfPointerConvertible<_Pp> > 1792 _LIBCPP_INLINE_VISIBILITY 1793 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 1794 1795 _LIBCPP_INLINE_VISIBILITY 1796 unique_ptr(unique_ptr&& __u) _NOEXCEPT 1797 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 1798 } 1799 1800 _LIBCPP_INLINE_VISIBILITY 1801 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 1802 reset(__u.release()); 1803 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 1804 return *this; 1805 } 1806 1807 template <class _Up, class _Ep, 1808 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1809 class = _EnableIfDeleterConvertible<_Ep> 1810 > 1811 _LIBCPP_INLINE_VISIBILITY 1812 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 1813 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 1814 } 1815 1816 template <class _Up, class _Ep, 1817 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1818 class = _EnableIfDeleterAssignable<_Ep> 1819 > 1820 _LIBCPP_INLINE_VISIBILITY 1821 unique_ptr& 1822 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 1823 reset(__u.release()); 1824 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 1825 return *this; 1826 } 1827 1828#ifdef _LIBCPP_CXX03_LANG 1829 unique_ptr(unique_ptr const&) = delete; 1830 unique_ptr& operator=(unique_ptr const&) = delete; 1831#endif 1832 1833public: 1834 _LIBCPP_INLINE_VISIBILITY 1835 ~unique_ptr() { reset(); } 1836 1837 _LIBCPP_INLINE_VISIBILITY 1838 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 1839 reset(); 1840 return *this; 1841 } 1842 1843 _LIBCPP_INLINE_VISIBILITY 1844 typename add_lvalue_reference<_Tp>::type 1845 operator[](size_t __i) const { 1846 return __ptr_.first()[__i]; 1847 } 1848 _LIBCPP_INLINE_VISIBILITY 1849 pointer get() const _NOEXCEPT { 1850 return __ptr_.first(); 1851 } 1852 1853 _LIBCPP_INLINE_VISIBILITY 1854 deleter_type& get_deleter() _NOEXCEPT { 1855 return __ptr_.second(); 1856 } 1857 1858 _LIBCPP_INLINE_VISIBILITY 1859 const deleter_type& get_deleter() const _NOEXCEPT { 1860 return __ptr_.second(); 1861 } 1862 _LIBCPP_INLINE_VISIBILITY 1863 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 1864 return __ptr_.first() != nullptr; 1865 } 1866 1867 _LIBCPP_INLINE_VISIBILITY 1868 pointer release() _NOEXCEPT { 1869 pointer __t = __ptr_.first(); 1870 __ptr_.first() = pointer(); 1871 return __t; 1872 } 1873 1874 template <class _Pp> 1875 _LIBCPP_INLINE_VISIBILITY 1876 typename enable_if< 1877 _CheckArrayPointerConversion<_Pp>::value 1878 >::type 1879 reset(_Pp __p) _NOEXCEPT { 1880 pointer __tmp = __ptr_.first(); 1881 __ptr_.first() = __p; 1882 if (__tmp) 1883 __ptr_.second()(__tmp); 1884 } 1885 1886 _LIBCPP_INLINE_VISIBILITY 1887 void reset(nullptr_t = nullptr) _NOEXCEPT { 1888 pointer __tmp = __ptr_.first(); 1889 __ptr_.first() = nullptr; 1890 if (__tmp) 1891 __ptr_.second()(__tmp); 1892 } 1893 1894 _LIBCPP_INLINE_VISIBILITY 1895 void swap(unique_ptr& __u) _NOEXCEPT { 1896 __ptr_.swap(__u.__ptr_); 1897 } 1898 1899}; 1900 1901template <class _Tp, class _Dp> 1902inline _LIBCPP_INLINE_VISIBILITY 1903typename enable_if< 1904 __is_swappable<_Dp>::value, 1905 void 1906>::type 1907swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 1908 1909template <class _T1, class _D1, class _T2, class _D2> 1910inline _LIBCPP_INLINE_VISIBILITY 1911bool 1912operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 1913 1914template <class _T1, class _D1, class _T2, class _D2> 1915inline _LIBCPP_INLINE_VISIBILITY 1916bool 1917operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 1918 1919template <class _T1, class _D1, class _T2, class _D2> 1920inline _LIBCPP_INLINE_VISIBILITY 1921bool 1922operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 1923{ 1924 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1925 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 1926 typedef typename common_type<_P1, _P2>::type _Vp; 1927 return less<_Vp>()(__x.get(), __y.get()); 1928} 1929 1930template <class _T1, class _D1, class _T2, class _D2> 1931inline _LIBCPP_INLINE_VISIBILITY 1932bool 1933operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 1934 1935template <class _T1, class _D1, class _T2, class _D2> 1936inline _LIBCPP_INLINE_VISIBILITY 1937bool 1938operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 1939 1940template <class _T1, class _D1, class _T2, class _D2> 1941inline _LIBCPP_INLINE_VISIBILITY 1942bool 1943operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 1944 1945template <class _T1, class _D1> 1946inline _LIBCPP_INLINE_VISIBILITY 1947bool 1948operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 1949{ 1950 return !__x; 1951} 1952 1953template <class _T1, class _D1> 1954inline _LIBCPP_INLINE_VISIBILITY 1955bool 1956operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 1957{ 1958 return !__x; 1959} 1960 1961template <class _T1, class _D1> 1962inline _LIBCPP_INLINE_VISIBILITY 1963bool 1964operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 1965{ 1966 return static_cast<bool>(__x); 1967} 1968 1969template <class _T1, class _D1> 1970inline _LIBCPP_INLINE_VISIBILITY 1971bool 1972operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 1973{ 1974 return static_cast<bool>(__x); 1975} 1976 1977template <class _T1, class _D1> 1978inline _LIBCPP_INLINE_VISIBILITY 1979bool 1980operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1981{ 1982 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1983 return less<_P1>()(__x.get(), nullptr); 1984} 1985 1986template <class _T1, class _D1> 1987inline _LIBCPP_INLINE_VISIBILITY 1988bool 1989operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 1990{ 1991 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1992 return less<_P1>()(nullptr, __x.get()); 1993} 1994 1995template <class _T1, class _D1> 1996inline _LIBCPP_INLINE_VISIBILITY 1997bool 1998operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1999{ 2000 return nullptr < __x; 2001} 2002 2003template <class _T1, class _D1> 2004inline _LIBCPP_INLINE_VISIBILITY 2005bool 2006operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2007{ 2008 return __x < nullptr; 2009} 2010 2011template <class _T1, class _D1> 2012inline _LIBCPP_INLINE_VISIBILITY 2013bool 2014operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2015{ 2016 return !(nullptr < __x); 2017} 2018 2019template <class _T1, class _D1> 2020inline _LIBCPP_INLINE_VISIBILITY 2021bool 2022operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2023{ 2024 return !(__x < nullptr); 2025} 2026 2027template <class _T1, class _D1> 2028inline _LIBCPP_INLINE_VISIBILITY 2029bool 2030operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2031{ 2032 return !(__x < nullptr); 2033} 2034 2035template <class _T1, class _D1> 2036inline _LIBCPP_INLINE_VISIBILITY 2037bool 2038operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2039{ 2040 return !(nullptr < __x); 2041} 2042 2043#if _LIBCPP_STD_VER > 11 2044 2045template<class _Tp> 2046struct __unique_if 2047{ 2048 typedef unique_ptr<_Tp> __unique_single; 2049}; 2050 2051template<class _Tp> 2052struct __unique_if<_Tp[]> 2053{ 2054 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 2055}; 2056 2057template<class _Tp, size_t _Np> 2058struct __unique_if<_Tp[_Np]> 2059{ 2060 typedef void __unique_array_known_bound; 2061}; 2062 2063template<class _Tp, class... _Args> 2064inline _LIBCPP_INLINE_VISIBILITY 2065typename __unique_if<_Tp>::__unique_single 2066make_unique(_Args&&... __args) 2067{ 2068 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 2069} 2070 2071template<class _Tp> 2072inline _LIBCPP_INLINE_VISIBILITY 2073typename __unique_if<_Tp>::__unique_array_unknown_bound 2074make_unique(size_t __n) 2075{ 2076 typedef typename remove_extent<_Tp>::type _Up; 2077 return unique_ptr<_Tp>(new _Up[__n]()); 2078} 2079 2080template<class _Tp, class... _Args> 2081 typename __unique_if<_Tp>::__unique_array_known_bound 2082 make_unique(_Args&&...) = delete; 2083 2084#endif // _LIBCPP_STD_VER > 11 2085 2086template <class _Tp, class _Dp> 2087#ifdef _LIBCPP_CXX03_LANG 2088struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 2089#else 2090struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 2091 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 2092#endif 2093{ 2094 typedef unique_ptr<_Tp, _Dp> argument_type; 2095 typedef size_t result_type; 2096 _LIBCPP_INLINE_VISIBILITY 2097 result_type operator()(const argument_type& __ptr) const 2098 { 2099 typedef typename argument_type::pointer pointer; 2100 return hash<pointer>()(__ptr.get()); 2101 } 2102}; 2103 2104struct __destruct_n 2105{ 2106private: 2107 size_t __size_; 2108 2109 template <class _Tp> 2110 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 2111 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 2112 2113 template <class _Tp> 2114 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 2115 {} 2116 2117 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 2118 {++__size_;} 2119 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 2120 {} 2121 2122 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 2123 {__size_ = __s;} 2124 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 2125 {} 2126public: 2127 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 2128 : __size_(__s) {} 2129 2130 template <class _Tp> 2131 _LIBCPP_INLINE_VISIBILITY void __incr() _NOEXCEPT 2132 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2133 2134 template <class _Tp> 2135 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 2136 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2137 2138 template <class _Tp> 2139 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 2140 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2141}; 2142 2143template <class _Alloc> 2144class __allocator_destructor 2145{ 2146 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 2147public: 2148 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 2149 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 2150private: 2151 _Alloc& __alloc_; 2152 size_type __s_; 2153public: 2154 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 2155 _NOEXCEPT 2156 : __alloc_(__a), __s_(__s) {} 2157 _LIBCPP_INLINE_VISIBILITY 2158 void operator()(pointer __p) _NOEXCEPT 2159 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 2160}; 2161 2162template <class _InputIterator, class _ForwardIterator> 2163_ForwardIterator 2164uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 2165{ 2166 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2167#ifndef _LIBCPP_NO_EXCEPTIONS 2168 _ForwardIterator __s = __r; 2169 try 2170 { 2171#endif 2172 for (; __f != __l; ++__f, (void) ++__r) 2173 ::new ((void*)_VSTD::addressof(*__r)) value_type(*__f); 2174#ifndef _LIBCPP_NO_EXCEPTIONS 2175 } 2176 catch (...) 2177 { 2178 for (; __s != __r; ++__s) 2179 __s->~value_type(); 2180 throw; 2181 } 2182#endif 2183 return __r; 2184} 2185 2186template <class _InputIterator, class _Size, class _ForwardIterator> 2187_ForwardIterator 2188uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 2189{ 2190 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2191#ifndef _LIBCPP_NO_EXCEPTIONS 2192 _ForwardIterator __s = __r; 2193 try 2194 { 2195#endif 2196 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 2197 ::new ((void*)_VSTD::addressof(*__r)) value_type(*__f); 2198#ifndef _LIBCPP_NO_EXCEPTIONS 2199 } 2200 catch (...) 2201 { 2202 for (; __s != __r; ++__s) 2203 __s->~value_type(); 2204 throw; 2205 } 2206#endif 2207 return __r; 2208} 2209 2210template <class _ForwardIterator, class _Tp> 2211void 2212uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 2213{ 2214 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2215#ifndef _LIBCPP_NO_EXCEPTIONS 2216 _ForwardIterator __s = __f; 2217 try 2218 { 2219#endif 2220 for (; __f != __l; ++__f) 2221 ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); 2222#ifndef _LIBCPP_NO_EXCEPTIONS 2223 } 2224 catch (...) 2225 { 2226 for (; __s != __f; ++__s) 2227 __s->~value_type(); 2228 throw; 2229 } 2230#endif 2231} 2232 2233template <class _ForwardIterator, class _Size, class _Tp> 2234_ForwardIterator 2235uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 2236{ 2237 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2238#ifndef _LIBCPP_NO_EXCEPTIONS 2239 _ForwardIterator __s = __f; 2240 try 2241 { 2242#endif 2243 for (; __n > 0; ++__f, (void) --__n) 2244 ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); 2245#ifndef _LIBCPP_NO_EXCEPTIONS 2246 } 2247 catch (...) 2248 { 2249 for (; __s != __f; ++__s) 2250 __s->~value_type(); 2251 throw; 2252 } 2253#endif 2254 return __f; 2255} 2256 2257#if _LIBCPP_STD_VER > 14 2258 2259template <class _ForwardIterator> 2260inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 2261void destroy(_ForwardIterator __first, _ForwardIterator __last) { 2262 for (; __first != __last; ++__first) 2263 _VSTD::destroy_at(_VSTD::addressof(*__first)); 2264} 2265 2266template <class _ForwardIterator, class _Size> 2267inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 2268_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 2269 for (; __n > 0; (void)++__first, --__n) 2270 _VSTD::destroy_at(_VSTD::addressof(*__first)); 2271 return __first; 2272} 2273 2274template <class _ForwardIterator> 2275inline _LIBCPP_INLINE_VISIBILITY 2276void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 2277 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2278 auto __idx = __first; 2279#ifndef _LIBCPP_NO_EXCEPTIONS 2280 try { 2281#endif 2282 for (; __idx != __last; ++__idx) 2283 ::new ((void*)_VSTD::addressof(*__idx)) _Vt; 2284#ifndef _LIBCPP_NO_EXCEPTIONS 2285 } catch (...) { 2286 _VSTD::destroy(__first, __idx); 2287 throw; 2288 } 2289#endif 2290} 2291 2292template <class _ForwardIterator, class _Size> 2293inline _LIBCPP_INLINE_VISIBILITY 2294_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 2295 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2296 auto __idx = __first; 2297#ifndef _LIBCPP_NO_EXCEPTIONS 2298 try { 2299#endif 2300 for (; __n > 0; (void)++__idx, --__n) 2301 ::new ((void*)_VSTD::addressof(*__idx)) _Vt; 2302 return __idx; 2303#ifndef _LIBCPP_NO_EXCEPTIONS 2304 } catch (...) { 2305 _VSTD::destroy(__first, __idx); 2306 throw; 2307 } 2308#endif 2309} 2310 2311 2312template <class _ForwardIterator> 2313inline _LIBCPP_INLINE_VISIBILITY 2314void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 2315 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2316 auto __idx = __first; 2317#ifndef _LIBCPP_NO_EXCEPTIONS 2318 try { 2319#endif 2320 for (; __idx != __last; ++__idx) 2321 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); 2322#ifndef _LIBCPP_NO_EXCEPTIONS 2323 } catch (...) { 2324 _VSTD::destroy(__first, __idx); 2325 throw; 2326 } 2327#endif 2328} 2329 2330template <class _ForwardIterator, class _Size> 2331inline _LIBCPP_INLINE_VISIBILITY 2332_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 2333 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2334 auto __idx = __first; 2335#ifndef _LIBCPP_NO_EXCEPTIONS 2336 try { 2337#endif 2338 for (; __n > 0; (void)++__idx, --__n) 2339 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); 2340 return __idx; 2341#ifndef _LIBCPP_NO_EXCEPTIONS 2342 } catch (...) { 2343 _VSTD::destroy(__first, __idx); 2344 throw; 2345 } 2346#endif 2347} 2348 2349 2350template <class _InputIt, class _ForwardIt> 2351inline _LIBCPP_INLINE_VISIBILITY 2352_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 2353 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 2354 auto __idx = __first_res; 2355#ifndef _LIBCPP_NO_EXCEPTIONS 2356 try { 2357#endif 2358 for (; __first != __last; (void)++__idx, ++__first) 2359 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(_VSTD::move(*__first)); 2360 return __idx; 2361#ifndef _LIBCPP_NO_EXCEPTIONS 2362 } catch (...) { 2363 _VSTD::destroy(__first_res, __idx); 2364 throw; 2365 } 2366#endif 2367} 2368 2369template <class _InputIt, class _Size, class _ForwardIt> 2370inline _LIBCPP_INLINE_VISIBILITY 2371pair<_InputIt, _ForwardIt> 2372uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 2373 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 2374 auto __idx = __first_res; 2375#ifndef _LIBCPP_NO_EXCEPTIONS 2376 try { 2377#endif 2378 for (; __n > 0; ++__idx, (void)++__first, --__n) 2379 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(_VSTD::move(*__first)); 2380 return {__first, __idx}; 2381#ifndef _LIBCPP_NO_EXCEPTIONS 2382 } catch (...) { 2383 _VSTD::destroy(__first_res, __idx); 2384 throw; 2385 } 2386#endif 2387} 2388 2389 2390#endif // _LIBCPP_STD_VER > 14 2391 2392// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 2393// should be sufficient for thread safety. 2394// See https://bugs.llvm.org/show_bug.cgi?id=22803 2395#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 2396 && defined(__ATOMIC_RELAXED) \ 2397 && defined(__ATOMIC_ACQ_REL) 2398# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 2399#elif defined(_LIBCPP_COMPILER_GCC) 2400# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 2401#endif 2402 2403template <class _Tp> 2404inline _LIBCPP_INLINE_VISIBILITY _Tp 2405__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 2406{ 2407#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 2408 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 2409#else 2410 return __t += 1; 2411#endif 2412} 2413 2414template <class _Tp> 2415inline _LIBCPP_INLINE_VISIBILITY _Tp 2416__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 2417{ 2418#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 2419 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 2420#else 2421 return __t -= 1; 2422#endif 2423} 2424 2425class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 2426 : public std::exception 2427{ 2428public: 2429 bad_weak_ptr() _NOEXCEPT = default; 2430 bad_weak_ptr(const bad_weak_ptr&) _NOEXCEPT = default; 2431 virtual ~bad_weak_ptr() _NOEXCEPT; 2432 virtual const char* what() const _NOEXCEPT; 2433}; 2434 2435_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 2436void __throw_bad_weak_ptr() 2437{ 2438#ifndef _LIBCPP_NO_EXCEPTIONS 2439 throw bad_weak_ptr(); 2440#else 2441 _VSTD::abort(); 2442#endif 2443} 2444 2445template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 2446 2447class _LIBCPP_TYPE_VIS __shared_count 2448{ 2449 __shared_count(const __shared_count&); 2450 __shared_count& operator=(const __shared_count&); 2451 2452protected: 2453 long __shared_owners_; 2454 virtual ~__shared_count(); 2455private: 2456 virtual void __on_zero_shared() _NOEXCEPT = 0; 2457 2458public: 2459 _LIBCPP_INLINE_VISIBILITY 2460 explicit __shared_count(long __refs = 0) _NOEXCEPT 2461 : __shared_owners_(__refs) {} 2462 2463#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 2464 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 2465 void __add_shared() _NOEXCEPT; 2466 bool __release_shared() _NOEXCEPT; 2467#else 2468 _LIBCPP_INLINE_VISIBILITY 2469 void __add_shared() _NOEXCEPT { 2470 __libcpp_atomic_refcount_increment(__shared_owners_); 2471 } 2472 _LIBCPP_INLINE_VISIBILITY 2473 bool __release_shared() _NOEXCEPT { 2474 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 2475 __on_zero_shared(); 2476 return true; 2477 } 2478 return false; 2479 } 2480#endif 2481 _LIBCPP_INLINE_VISIBILITY 2482 long use_count() const _NOEXCEPT { 2483 return __libcpp_relaxed_load(&__shared_owners_) + 1; 2484 } 2485}; 2486 2487class _LIBCPP_TYPE_VIS __shared_weak_count 2488 : private __shared_count 2489{ 2490 long __shared_weak_owners_; 2491 2492public: 2493 _LIBCPP_INLINE_VISIBILITY 2494 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 2495 : __shared_count(__refs), 2496 __shared_weak_owners_(__refs) {} 2497protected: 2498 virtual ~__shared_weak_count(); 2499 2500public: 2501#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 2502 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 2503 void __add_shared() _NOEXCEPT; 2504 void __add_weak() _NOEXCEPT; 2505 void __release_shared() _NOEXCEPT; 2506#else 2507 _LIBCPP_INLINE_VISIBILITY 2508 void __add_shared() _NOEXCEPT { 2509 __shared_count::__add_shared(); 2510 } 2511 _LIBCPP_INLINE_VISIBILITY 2512 void __add_weak() _NOEXCEPT { 2513 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 2514 } 2515 _LIBCPP_INLINE_VISIBILITY 2516 void __release_shared() _NOEXCEPT { 2517 if (__shared_count::__release_shared()) 2518 __release_weak(); 2519 } 2520#endif 2521 void __release_weak() _NOEXCEPT; 2522 _LIBCPP_INLINE_VISIBILITY 2523 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 2524 __shared_weak_count* lock() _NOEXCEPT; 2525 2526 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 2527private: 2528 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 2529}; 2530 2531template <class _Tp, class _Dp, class _Alloc> 2532class __shared_ptr_pointer 2533 : public __shared_weak_count 2534{ 2535 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 2536public: 2537 _LIBCPP_INLINE_VISIBILITY 2538 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 2539 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 2540 2541#ifndef _LIBCPP_NO_RTTI 2542 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 2543#endif 2544 2545private: 2546 virtual void __on_zero_shared() _NOEXCEPT; 2547 virtual void __on_zero_shared_weak() _NOEXCEPT; 2548}; 2549 2550#ifndef _LIBCPP_NO_RTTI 2551 2552template <class _Tp, class _Dp, class _Alloc> 2553const void* 2554__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 2555{ 2556 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 2557} 2558 2559#endif // _LIBCPP_NO_RTTI 2560 2561template <class _Tp, class _Dp, class _Alloc> 2562void 2563__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 2564{ 2565 __data_.first().second()(__data_.first().first()); 2566 __data_.first().second().~_Dp(); 2567} 2568 2569template <class _Tp, class _Dp, class _Alloc> 2570void 2571__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 2572{ 2573 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 2574 typedef allocator_traits<_Al> _ATraits; 2575 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 2576 2577 _Al __a(__data_.second()); 2578 __data_.second().~_Alloc(); 2579 __a.deallocate(_PTraits::pointer_to(*this), 1); 2580} 2581 2582template <class _Tp, class _Alloc> 2583struct __shared_ptr_emplace 2584 : __shared_weak_count 2585{ 2586 template<class ..._Args> 2587 _LIBCPP_HIDE_FROM_ABI 2588 explicit __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 2589 : __storage_(_VSTD::move(__a)) 2590 { 2591#if _LIBCPP_STD_VER > 17 2592 using _TpAlloc = typename __allocator_traits_rebind<_Alloc, _Tp>::type; 2593 _TpAlloc __tmp(*__get_alloc()); 2594 allocator_traits<_TpAlloc>::construct(__tmp, __get_elem(), _VSTD::forward<_Args>(__args)...); 2595#else 2596 ::new ((void*)__get_elem()) _Tp(_VSTD::forward<_Args>(__args)...); 2597#endif 2598 } 2599 2600 _LIBCPP_HIDE_FROM_ABI 2601 _Alloc* __get_alloc() _NOEXCEPT { return __storage_.__get_alloc(); } 2602 2603 _LIBCPP_HIDE_FROM_ABI 2604 _Tp* __get_elem() _NOEXCEPT { return __storage_.__get_elem(); } 2605 2606private: 2607 virtual void __on_zero_shared() _NOEXCEPT { 2608#if _LIBCPP_STD_VER > 17 2609 using _TpAlloc = typename __allocator_traits_rebind<_Alloc, _Tp>::type; 2610 _TpAlloc __tmp(*__get_alloc()); 2611 allocator_traits<_TpAlloc>::destroy(__tmp, __get_elem()); 2612#else 2613 __get_elem()->~_Tp(); 2614#endif 2615 } 2616 2617 virtual void __on_zero_shared_weak() _NOEXCEPT { 2618 using _ControlBlockAlloc = typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type; 2619 using _ControlBlockPointer = typename allocator_traits<_ControlBlockAlloc>::pointer; 2620 _ControlBlockAlloc __tmp(*__get_alloc()); 2621 __storage_.~_Storage(); 2622 allocator_traits<_ControlBlockAlloc>::deallocate(__tmp, 2623 pointer_traits<_ControlBlockPointer>::pointer_to(*this), 1); 2624 } 2625 2626 // This class implements the control block for non-array shared pointers created 2627 // through `std::allocate_shared` and `std::make_shared`. 2628 // 2629 // In previous versions of the library, we used a compressed pair to store 2630 // both the _Alloc and the _Tp. This implies using EBO, which is incompatible 2631 // with Allocator construction for _Tp. To allow implementing P0674 in C++20, 2632 // we now use a properly aligned char buffer while making sure that we maintain 2633 // the same layout that we had when we used a compressed pair. 2634 using _CompressedPair = __compressed_pair<_Alloc, _Tp>; 2635 struct _ALIGNAS_TYPE(_CompressedPair) _Storage { 2636 char __blob_[sizeof(_CompressedPair)]; 2637 2638 _LIBCPP_HIDE_FROM_ABI explicit _Storage(_Alloc&& __a) { 2639 ::new ((void*)__get_alloc()) _Alloc(_VSTD::move(__a)); 2640 } 2641 _LIBCPP_HIDE_FROM_ABI ~_Storage() { 2642 __get_alloc()->~_Alloc(); 2643 } 2644 _Alloc* __get_alloc() _NOEXCEPT { 2645 _CompressedPair *__as_pair = reinterpret_cast<_CompressedPair*>(__blob_); 2646 typename _CompressedPair::_Base1* __first = _CompressedPair::__get_first_base(__as_pair); 2647 _Alloc *__alloc = reinterpret_cast<_Alloc*>(__first); 2648 return __alloc; 2649 } 2650 _LIBCPP_NO_CFI _Tp* __get_elem() _NOEXCEPT { 2651 _CompressedPair *__as_pair = reinterpret_cast<_CompressedPair*>(__blob_); 2652 typename _CompressedPair::_Base2* __second = _CompressedPair::__get_second_base(__as_pair); 2653 _Tp *__elem = reinterpret_cast<_Tp*>(__second); 2654 return __elem; 2655 } 2656 }; 2657 2658 static_assert(_LIBCPP_ALIGNOF(_Storage) == _LIBCPP_ALIGNOF(_CompressedPair), ""); 2659 static_assert(sizeof(_Storage) == sizeof(_CompressedPair), ""); 2660 _Storage __storage_; 2661}; 2662 2663struct __shared_ptr_dummy_rebind_allocator_type; 2664template <> 2665class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 2666{ 2667public: 2668 template <class _Other> 2669 struct rebind 2670 { 2671 typedef allocator<_Other> other; 2672 }; 2673}; 2674 2675template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 2676 2677template<class _Tp, class _Up> 2678struct __compatible_with 2679#if _LIBCPP_STD_VER > 14 2680 : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {}; 2681#else 2682 : is_convertible<_Tp*, _Up*> {}; 2683#endif // _LIBCPP_STD_VER > 14 2684 2685#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI) 2686# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 2687#else 2688# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI 2689#endif 2690 2691template<class _Tp> 2692class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr 2693{ 2694public: 2695#if _LIBCPP_STD_VER > 14 2696 typedef weak_ptr<_Tp> weak_type; 2697 typedef remove_extent_t<_Tp> element_type; 2698#else 2699 typedef _Tp element_type; 2700#endif 2701 2702private: 2703 element_type* __ptr_; 2704 __shared_weak_count* __cntrl_; 2705 2706 struct __nat {int __for_bool_;}; 2707public: 2708 _LIBCPP_INLINE_VISIBILITY 2709 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 2710 _LIBCPP_INLINE_VISIBILITY 2711 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 2712 template<class _Yp> 2713 explicit shared_ptr(_Yp* __p, 2714 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 2715 template<class _Yp, class _Dp> 2716 shared_ptr(_Yp* __p, _Dp __d, 2717 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 2718 template<class _Yp, class _Dp, class _Alloc> 2719 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 2720 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 2721 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 2722 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 2723 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 2724 _LIBCPP_INLINE_VISIBILITY 2725 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 2726 template<class _Yp> 2727 _LIBCPP_INLINE_VISIBILITY 2728 shared_ptr(const shared_ptr<_Yp>& __r, 2729 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 2730 _NOEXCEPT; 2731 _LIBCPP_INLINE_VISIBILITY 2732 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 2733 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 2734 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 2735 _NOEXCEPT; 2736 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 2737 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 2738#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2739 template<class _Yp> 2740 shared_ptr(auto_ptr<_Yp>&& __r, 2741 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 2742#endif 2743 template <class _Yp, class _Dp> 2744 shared_ptr(unique_ptr<_Yp, _Dp>&&, 2745 typename enable_if 2746 < 2747 !is_lvalue_reference<_Dp>::value && 2748 !is_array<_Yp>::value && 2749 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2750 __nat 2751 >::type = __nat()); 2752 template <class _Yp, class _Dp> 2753 shared_ptr(unique_ptr<_Yp, _Dp>&&, 2754 typename enable_if 2755 < 2756 is_lvalue_reference<_Dp>::value && 2757 !is_array<_Yp>::value && 2758 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2759 __nat 2760 >::type = __nat()); 2761 2762 ~shared_ptr(); 2763 2764 _LIBCPP_INLINE_VISIBILITY 2765 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 2766 template<class _Yp> 2767 typename enable_if 2768 < 2769 __compatible_with<_Yp, element_type>::value, 2770 shared_ptr& 2771 >::type 2772 _LIBCPP_INLINE_VISIBILITY 2773 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 2774 _LIBCPP_INLINE_VISIBILITY 2775 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 2776 template<class _Yp> 2777 typename enable_if 2778 < 2779 __compatible_with<_Yp, element_type>::value, 2780 shared_ptr& 2781 >::type 2782 _LIBCPP_INLINE_VISIBILITY 2783 operator=(shared_ptr<_Yp>&& __r); 2784#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2785 template<class _Yp> 2786 _LIBCPP_INLINE_VISIBILITY 2787 typename enable_if 2788 < 2789 !is_array<_Yp>::value && 2790 is_convertible<_Yp*, element_type*>::value, 2791 shared_ptr 2792 >::type& 2793 operator=(auto_ptr<_Yp>&& __r); 2794#endif 2795 template <class _Yp, class _Dp> 2796 typename enable_if 2797 < 2798 !is_array<_Yp>::value && 2799 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2800 shared_ptr& 2801 >::type 2802 _LIBCPP_INLINE_VISIBILITY 2803 operator=(unique_ptr<_Yp, _Dp>&& __r); 2804 2805 _LIBCPP_INLINE_VISIBILITY 2806 void swap(shared_ptr& __r) _NOEXCEPT; 2807 _LIBCPP_INLINE_VISIBILITY 2808 void reset() _NOEXCEPT; 2809 template<class _Yp> 2810 typename enable_if 2811 < 2812 __compatible_with<_Yp, element_type>::value, 2813 void 2814 >::type 2815 _LIBCPP_INLINE_VISIBILITY 2816 reset(_Yp* __p); 2817 template<class _Yp, class _Dp> 2818 typename enable_if 2819 < 2820 __compatible_with<_Yp, element_type>::value, 2821 void 2822 >::type 2823 _LIBCPP_INLINE_VISIBILITY 2824 reset(_Yp* __p, _Dp __d); 2825 template<class _Yp, class _Dp, class _Alloc> 2826 typename enable_if 2827 < 2828 __compatible_with<_Yp, element_type>::value, 2829 void 2830 >::type 2831 _LIBCPP_INLINE_VISIBILITY 2832 reset(_Yp* __p, _Dp __d, _Alloc __a); 2833 2834 _LIBCPP_INLINE_VISIBILITY 2835 element_type* get() const _NOEXCEPT {return __ptr_;} 2836 _LIBCPP_INLINE_VISIBILITY 2837 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 2838 {return *__ptr_;} 2839 _LIBCPP_INLINE_VISIBILITY 2840 element_type* operator->() const _NOEXCEPT 2841 { 2842 static_assert(!_VSTD::is_array<_Tp>::value, 2843 "std::shared_ptr<T>::operator-> is only valid when T is not an array type."); 2844 return __ptr_; 2845 } 2846 _LIBCPP_INLINE_VISIBILITY 2847 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 2848 _LIBCPP_INLINE_VISIBILITY 2849 bool unique() const _NOEXCEPT {return use_count() == 1;} 2850 _LIBCPP_INLINE_VISIBILITY 2851 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != nullptr;} 2852 template <class _Up> 2853 _LIBCPP_INLINE_VISIBILITY 2854 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 2855 {return __cntrl_ < __p.__cntrl_;} 2856 template <class _Up> 2857 _LIBCPP_INLINE_VISIBILITY 2858 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 2859 {return __cntrl_ < __p.__cntrl_;} 2860 _LIBCPP_INLINE_VISIBILITY 2861 bool 2862 __owner_equivalent(const shared_ptr& __p) const 2863 {return __cntrl_ == __p.__cntrl_;} 2864 2865#if _LIBCPP_STD_VER > 14 2866 typename add_lvalue_reference<element_type>::type 2867 _LIBCPP_INLINE_VISIBILITY 2868 operator[](ptrdiff_t __i) const 2869 { 2870 static_assert(_VSTD::is_array<_Tp>::value, 2871 "std::shared_ptr<T>::operator[] is only valid when T is an array type."); 2872 return __ptr_[__i]; 2873 } 2874#endif 2875 2876#ifndef _LIBCPP_NO_RTTI 2877 template <class _Dp> 2878 _LIBCPP_INLINE_VISIBILITY 2879 _Dp* __get_deleter() const _NOEXCEPT 2880 {return static_cast<_Dp*>(__cntrl_ 2881 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 2882 : nullptr);} 2883#endif // _LIBCPP_NO_RTTI 2884 2885 template<class _Yp, class _CntrlBlk> 2886 static shared_ptr<_Tp> 2887 __create_with_control_block(_Yp* __p, _CntrlBlk* __cntrl) _NOEXCEPT 2888 { 2889 shared_ptr<_Tp> __r; 2890 __r.__ptr_ = __p; 2891 __r.__cntrl_ = __cntrl; 2892 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 2893 return __r; 2894 } 2895 2896private: 2897 template <class _Yp, bool = is_function<_Yp>::value> 2898 struct __shared_ptr_default_allocator 2899 { 2900 typedef allocator<_Yp> type; 2901 }; 2902 2903 template <class _Yp> 2904 struct __shared_ptr_default_allocator<_Yp, true> 2905 { 2906 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 2907 }; 2908 2909 template <class _Yp, class _OrigPtr> 2910 _LIBCPP_INLINE_VISIBILITY 2911 typename enable_if<is_convertible<_OrigPtr*, 2912 const enable_shared_from_this<_Yp>* 2913 >::value, 2914 void>::type 2915 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 2916 _OrigPtr* __ptr) _NOEXCEPT 2917 { 2918 typedef typename remove_cv<_Yp>::type _RawYp; 2919 if (__e && __e->__weak_this_.expired()) 2920 { 2921 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 2922 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 2923 } 2924 } 2925 2926 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 2927 2928 template <class, class _Yp> 2929 struct __shared_ptr_default_delete 2930 : default_delete<_Yp> {}; 2931 2932 template <class _Yp, class _Un, size_t _Sz> 2933 struct __shared_ptr_default_delete<_Yp[_Sz], _Un> 2934 : default_delete<_Yp[]> {}; 2935 2936 template <class _Yp, class _Un> 2937 struct __shared_ptr_default_delete<_Yp[], _Un> 2938 : default_delete<_Yp[]> {}; 2939 2940 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 2941 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 2942}; 2943 2944#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 2945template<class _Tp> 2946shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>; 2947template<class _Tp, class _Dp> 2948shared_ptr(unique_ptr<_Tp, _Dp>) -> shared_ptr<_Tp>; 2949#endif 2950 2951template<class _Tp> 2952inline 2953_LIBCPP_CONSTEXPR 2954shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 2955 : __ptr_(nullptr), 2956 __cntrl_(nullptr) 2957{ 2958} 2959 2960template<class _Tp> 2961inline 2962_LIBCPP_CONSTEXPR 2963shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 2964 : __ptr_(nullptr), 2965 __cntrl_(nullptr) 2966{ 2967} 2968 2969template<class _Tp> 2970template<class _Yp> 2971shared_ptr<_Tp>::shared_ptr(_Yp* __p, 2972 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 2973 : __ptr_(__p) 2974{ 2975 unique_ptr<_Yp> __hold(__p); 2976 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 2977 typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk; 2978 __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT()); 2979 __hold.release(); 2980 __enable_weak_this(__p, __p); 2981} 2982 2983template<class _Tp> 2984template<class _Yp, class _Dp> 2985shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 2986 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 2987 : __ptr_(__p) 2988{ 2989#ifndef _LIBCPP_NO_EXCEPTIONS 2990 try 2991 { 2992#endif // _LIBCPP_NO_EXCEPTIONS 2993 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 2994 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 2995 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 2996 __enable_weak_this(__p, __p); 2997#ifndef _LIBCPP_NO_EXCEPTIONS 2998 } 2999 catch (...) 3000 { 3001 __d(__p); 3002 throw; 3003 } 3004#endif // _LIBCPP_NO_EXCEPTIONS 3005} 3006 3007template<class _Tp> 3008template<class _Dp> 3009shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 3010 : __ptr_(nullptr) 3011{ 3012#ifndef _LIBCPP_NO_EXCEPTIONS 3013 try 3014 { 3015#endif // _LIBCPP_NO_EXCEPTIONS 3016 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 3017 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 3018 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3019#ifndef _LIBCPP_NO_EXCEPTIONS 3020 } 3021 catch (...) 3022 { 3023 __d(__p); 3024 throw; 3025 } 3026#endif // _LIBCPP_NO_EXCEPTIONS 3027} 3028 3029template<class _Tp> 3030template<class _Yp, class _Dp, class _Alloc> 3031shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3032 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3033 : __ptr_(__p) 3034{ 3035#ifndef _LIBCPP_NO_EXCEPTIONS 3036 try 3037 { 3038#endif // _LIBCPP_NO_EXCEPTIONS 3039 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 3040 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3041 typedef __allocator_destructor<_A2> _D2; 3042 _A2 __a2(__a); 3043 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3044 ::new ((void*)_VSTD::addressof(*__hold2.get())) _CntrlBlk(__p, __d, __a); 3045 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3046 __enable_weak_this(__p, __p); 3047#ifndef _LIBCPP_NO_EXCEPTIONS 3048 } 3049 catch (...) 3050 { 3051 __d(__p); 3052 throw; 3053 } 3054#endif // _LIBCPP_NO_EXCEPTIONS 3055} 3056 3057template<class _Tp> 3058template<class _Dp, class _Alloc> 3059shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 3060 : __ptr_(nullptr) 3061{ 3062#ifndef _LIBCPP_NO_EXCEPTIONS 3063 try 3064 { 3065#endif // _LIBCPP_NO_EXCEPTIONS 3066 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 3067 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3068 typedef __allocator_destructor<_A2> _D2; 3069 _A2 __a2(__a); 3070 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3071 ::new ((void*)_VSTD::addressof(*__hold2.get())) _CntrlBlk(__p, __d, __a); 3072 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3073#ifndef _LIBCPP_NO_EXCEPTIONS 3074 } 3075 catch (...) 3076 { 3077 __d(__p); 3078 throw; 3079 } 3080#endif // _LIBCPP_NO_EXCEPTIONS 3081} 3082 3083template<class _Tp> 3084template<class _Yp> 3085inline 3086shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 3087 : __ptr_(__p), 3088 __cntrl_(__r.__cntrl_) 3089{ 3090 if (__cntrl_) 3091 __cntrl_->__add_shared(); 3092} 3093 3094template<class _Tp> 3095inline 3096shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 3097 : __ptr_(__r.__ptr_), 3098 __cntrl_(__r.__cntrl_) 3099{ 3100 if (__cntrl_) 3101 __cntrl_->__add_shared(); 3102} 3103 3104template<class _Tp> 3105template<class _Yp> 3106inline 3107shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 3108 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3109 _NOEXCEPT 3110 : __ptr_(__r.__ptr_), 3111 __cntrl_(__r.__cntrl_) 3112{ 3113 if (__cntrl_) 3114 __cntrl_->__add_shared(); 3115} 3116 3117template<class _Tp> 3118inline 3119shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 3120 : __ptr_(__r.__ptr_), 3121 __cntrl_(__r.__cntrl_) 3122{ 3123 __r.__ptr_ = nullptr; 3124 __r.__cntrl_ = nullptr; 3125} 3126 3127template<class _Tp> 3128template<class _Yp> 3129inline 3130shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 3131 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3132 _NOEXCEPT 3133 : __ptr_(__r.__ptr_), 3134 __cntrl_(__r.__cntrl_) 3135{ 3136 __r.__ptr_ = nullptr; 3137 __r.__cntrl_ = nullptr; 3138} 3139 3140#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3141template<class _Tp> 3142template<class _Yp> 3143shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 3144 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3145 : __ptr_(__r.get()) 3146{ 3147 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 3148 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 3149 __enable_weak_this(__r.get(), __r.get()); 3150 __r.release(); 3151} 3152#endif 3153 3154template<class _Tp> 3155template <class _Yp, class _Dp> 3156shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3157 typename enable_if 3158 < 3159 !is_lvalue_reference<_Dp>::value && 3160 !is_array<_Yp>::value && 3161 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3162 __nat 3163 >::type) 3164 : __ptr_(__r.get()) 3165{ 3166#if _LIBCPP_STD_VER > 11 3167 if (__ptr_ == nullptr) 3168 __cntrl_ = nullptr; 3169 else 3170#endif 3171 { 3172 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3173 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3174 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 3175 __enable_weak_this(__r.get(), __r.get()); 3176 } 3177 __r.release(); 3178} 3179 3180template<class _Tp> 3181template <class _Yp, class _Dp> 3182shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3183 typename enable_if 3184 < 3185 is_lvalue_reference<_Dp>::value && 3186 !is_array<_Yp>::value && 3187 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3188 __nat 3189 >::type) 3190 : __ptr_(__r.get()) 3191{ 3192#if _LIBCPP_STD_VER > 11 3193 if (__ptr_ == nullptr) 3194 __cntrl_ = nullptr; 3195 else 3196#endif 3197 { 3198 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3199 typedef __shared_ptr_pointer<_Yp*, 3200 reference_wrapper<typename remove_reference<_Dp>::type>, 3201 _AllocT > _CntrlBlk; 3202 __cntrl_ = new _CntrlBlk(__r.get(), _VSTD::ref(__r.get_deleter()), _AllocT()); 3203 __enable_weak_this(__r.get(), __r.get()); 3204 } 3205 __r.release(); 3206} 3207 3208template<class _Tp> 3209shared_ptr<_Tp>::~shared_ptr() 3210{ 3211 if (__cntrl_) 3212 __cntrl_->__release_shared(); 3213} 3214 3215template<class _Tp> 3216inline 3217shared_ptr<_Tp>& 3218shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 3219{ 3220 shared_ptr(__r).swap(*this); 3221 return *this; 3222} 3223 3224template<class _Tp> 3225template<class _Yp> 3226inline 3227typename enable_if 3228< 3229 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3230 shared_ptr<_Tp>& 3231>::type 3232shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 3233{ 3234 shared_ptr(__r).swap(*this); 3235 return *this; 3236} 3237 3238template<class _Tp> 3239inline 3240shared_ptr<_Tp>& 3241shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 3242{ 3243 shared_ptr(_VSTD::move(__r)).swap(*this); 3244 return *this; 3245} 3246 3247template<class _Tp> 3248template<class _Yp> 3249inline 3250typename enable_if 3251< 3252 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3253 shared_ptr<_Tp>& 3254>::type 3255shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 3256{ 3257 shared_ptr(_VSTD::move(__r)).swap(*this); 3258 return *this; 3259} 3260 3261#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3262template<class _Tp> 3263template<class _Yp> 3264inline 3265typename enable_if 3266< 3267 !is_array<_Yp>::value && 3268 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 3269 shared_ptr<_Tp> 3270>::type& 3271shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 3272{ 3273 shared_ptr(_VSTD::move(__r)).swap(*this); 3274 return *this; 3275} 3276#endif 3277 3278template<class _Tp> 3279template <class _Yp, class _Dp> 3280inline 3281typename enable_if 3282< 3283 !is_array<_Yp>::value && 3284 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 3285 typename shared_ptr<_Tp>::element_type*>::value, 3286 shared_ptr<_Tp>& 3287>::type 3288shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 3289{ 3290 shared_ptr(_VSTD::move(__r)).swap(*this); 3291 return *this; 3292} 3293 3294template<class _Tp> 3295inline 3296void 3297shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 3298{ 3299 _VSTD::swap(__ptr_, __r.__ptr_); 3300 _VSTD::swap(__cntrl_, __r.__cntrl_); 3301} 3302 3303template<class _Tp> 3304inline 3305void 3306shared_ptr<_Tp>::reset() _NOEXCEPT 3307{ 3308 shared_ptr().swap(*this); 3309} 3310 3311template<class _Tp> 3312template<class _Yp> 3313inline 3314typename enable_if 3315< 3316 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3317 void 3318>::type 3319shared_ptr<_Tp>::reset(_Yp* __p) 3320{ 3321 shared_ptr(__p).swap(*this); 3322} 3323 3324template<class _Tp> 3325template<class _Yp, class _Dp> 3326inline 3327typename enable_if 3328< 3329 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3330 void 3331>::type 3332shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 3333{ 3334 shared_ptr(__p, __d).swap(*this); 3335} 3336 3337template<class _Tp> 3338template<class _Yp, class _Dp, class _Alloc> 3339inline 3340typename enable_if 3341< 3342 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3343 void 3344>::type 3345shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 3346{ 3347 shared_ptr(__p, __d, __a).swap(*this); 3348} 3349 3350// 3351// std::allocate_shared and std::make_shared 3352// 3353template<class _Tp, class _Alloc, class ..._Args, class = _EnableIf<!is_array<_Tp>::value> > 3354_LIBCPP_HIDE_FROM_ABI 3355shared_ptr<_Tp> allocate_shared(const _Alloc& __a, _Args&& ...__args) 3356{ 3357 using _ControlBlock = __shared_ptr_emplace<_Tp, _Alloc>; 3358 using _ControlBlockAllocator = typename __allocator_traits_rebind<_Alloc, _ControlBlock>::type; 3359 __allocation_guard<_ControlBlockAllocator> __guard(__a, 1); 3360 ::new ((void*)_VSTD::addressof(*__guard.__get())) _ControlBlock(__a, _VSTD::forward<_Args>(__args)...); 3361 auto __control_block = __guard.__release_ptr(); 3362 return shared_ptr<_Tp>::__create_with_control_block((*__control_block).__get_elem(), _VSTD::addressof(*__control_block)); 3363} 3364 3365template<class _Tp, class ..._Args, class = _EnableIf<!is_array<_Tp>::value> > 3366_LIBCPP_HIDE_FROM_ABI 3367shared_ptr<_Tp> make_shared(_Args&& ...__args) 3368{ 3369 return _VSTD::allocate_shared<_Tp>(allocator<_Tp>(), _VSTD::forward<_Args>(__args)...); 3370} 3371 3372template<class _Tp, class _Up> 3373inline _LIBCPP_INLINE_VISIBILITY 3374bool 3375operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3376{ 3377 return __x.get() == __y.get(); 3378} 3379 3380template<class _Tp, class _Up> 3381inline _LIBCPP_INLINE_VISIBILITY 3382bool 3383operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3384{ 3385 return !(__x == __y); 3386} 3387 3388template<class _Tp, class _Up> 3389inline _LIBCPP_INLINE_VISIBILITY 3390bool 3391operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3392{ 3393#if _LIBCPP_STD_VER <= 11 3394 typedef typename common_type<_Tp*, _Up*>::type _Vp; 3395 return less<_Vp>()(__x.get(), __y.get()); 3396#else 3397 return less<>()(__x.get(), __y.get()); 3398#endif 3399 3400} 3401 3402template<class _Tp, class _Up> 3403inline _LIBCPP_INLINE_VISIBILITY 3404bool 3405operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3406{ 3407 return __y < __x; 3408} 3409 3410template<class _Tp, class _Up> 3411inline _LIBCPP_INLINE_VISIBILITY 3412bool 3413operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3414{ 3415 return !(__y < __x); 3416} 3417 3418template<class _Tp, class _Up> 3419inline _LIBCPP_INLINE_VISIBILITY 3420bool 3421operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3422{ 3423 return !(__x < __y); 3424} 3425 3426template<class _Tp> 3427inline _LIBCPP_INLINE_VISIBILITY 3428bool 3429operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3430{ 3431 return !__x; 3432} 3433 3434template<class _Tp> 3435inline _LIBCPP_INLINE_VISIBILITY 3436bool 3437operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3438{ 3439 return !__x; 3440} 3441 3442template<class _Tp> 3443inline _LIBCPP_INLINE_VISIBILITY 3444bool 3445operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3446{ 3447 return static_cast<bool>(__x); 3448} 3449 3450template<class _Tp> 3451inline _LIBCPP_INLINE_VISIBILITY 3452bool 3453operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3454{ 3455 return static_cast<bool>(__x); 3456} 3457 3458template<class _Tp> 3459inline _LIBCPP_INLINE_VISIBILITY 3460bool 3461operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3462{ 3463 return less<_Tp*>()(__x.get(), nullptr); 3464} 3465 3466template<class _Tp> 3467inline _LIBCPP_INLINE_VISIBILITY 3468bool 3469operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3470{ 3471 return less<_Tp*>()(nullptr, __x.get()); 3472} 3473 3474template<class _Tp> 3475inline _LIBCPP_INLINE_VISIBILITY 3476bool 3477operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3478{ 3479 return nullptr < __x; 3480} 3481 3482template<class _Tp> 3483inline _LIBCPP_INLINE_VISIBILITY 3484bool 3485operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3486{ 3487 return __x < nullptr; 3488} 3489 3490template<class _Tp> 3491inline _LIBCPP_INLINE_VISIBILITY 3492bool 3493operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3494{ 3495 return !(nullptr < __x); 3496} 3497 3498template<class _Tp> 3499inline _LIBCPP_INLINE_VISIBILITY 3500bool 3501operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3502{ 3503 return !(__x < nullptr); 3504} 3505 3506template<class _Tp> 3507inline _LIBCPP_INLINE_VISIBILITY 3508bool 3509operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3510{ 3511 return !(__x < nullptr); 3512} 3513 3514template<class _Tp> 3515inline _LIBCPP_INLINE_VISIBILITY 3516bool 3517operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3518{ 3519 return !(nullptr < __x); 3520} 3521 3522template<class _Tp> 3523inline _LIBCPP_INLINE_VISIBILITY 3524void 3525swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 3526{ 3527 __x.swap(__y); 3528} 3529 3530template<class _Tp, class _Up> 3531inline _LIBCPP_INLINE_VISIBILITY 3532shared_ptr<_Tp> 3533static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3534{ 3535 return shared_ptr<_Tp>(__r, 3536 static_cast< 3537 typename shared_ptr<_Tp>::element_type*>(__r.get())); 3538} 3539 3540template<class _Tp, class _Up> 3541inline _LIBCPP_INLINE_VISIBILITY 3542shared_ptr<_Tp> 3543dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3544{ 3545 typedef typename shared_ptr<_Tp>::element_type _ET; 3546 _ET* __p = dynamic_cast<_ET*>(__r.get()); 3547 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 3548} 3549 3550template<class _Tp, class _Up> 3551shared_ptr<_Tp> 3552const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3553{ 3554 typedef typename shared_ptr<_Tp>::element_type _RTp; 3555 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 3556} 3557 3558template<class _Tp, class _Up> 3559shared_ptr<_Tp> 3560reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3561{ 3562 return shared_ptr<_Tp>(__r, 3563 reinterpret_cast< 3564 typename shared_ptr<_Tp>::element_type*>(__r.get())); 3565} 3566 3567#ifndef _LIBCPP_NO_RTTI 3568 3569template<class _Dp, class _Tp> 3570inline _LIBCPP_INLINE_VISIBILITY 3571_Dp* 3572get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 3573{ 3574 return __p.template __get_deleter<_Dp>(); 3575} 3576 3577#endif // _LIBCPP_NO_RTTI 3578 3579template<class _Tp> 3580class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS weak_ptr 3581{ 3582public: 3583 typedef _Tp element_type; 3584private: 3585 element_type* __ptr_; 3586 __shared_weak_count* __cntrl_; 3587 3588public: 3589 _LIBCPP_INLINE_VISIBILITY 3590 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 3591 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 3592 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3593 _NOEXCEPT; 3594 _LIBCPP_INLINE_VISIBILITY 3595 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 3596 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 3597 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3598 _NOEXCEPT; 3599 3600 _LIBCPP_INLINE_VISIBILITY 3601 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 3602 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 3603 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3604 _NOEXCEPT; 3605 ~weak_ptr(); 3606 3607 _LIBCPP_INLINE_VISIBILITY 3608 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 3609 template<class _Yp> 3610 typename enable_if 3611 < 3612 is_convertible<_Yp*, element_type*>::value, 3613 weak_ptr& 3614 >::type 3615 _LIBCPP_INLINE_VISIBILITY 3616 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 3617 3618 _LIBCPP_INLINE_VISIBILITY 3619 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 3620 template<class _Yp> 3621 typename enable_if 3622 < 3623 is_convertible<_Yp*, element_type*>::value, 3624 weak_ptr& 3625 >::type 3626 _LIBCPP_INLINE_VISIBILITY 3627 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 3628 3629 template<class _Yp> 3630 typename enable_if 3631 < 3632 is_convertible<_Yp*, element_type*>::value, 3633 weak_ptr& 3634 >::type 3635 _LIBCPP_INLINE_VISIBILITY 3636 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 3637 3638 _LIBCPP_INLINE_VISIBILITY 3639 void swap(weak_ptr& __r) _NOEXCEPT; 3640 _LIBCPP_INLINE_VISIBILITY 3641 void reset() _NOEXCEPT; 3642 3643 _LIBCPP_INLINE_VISIBILITY 3644 long use_count() const _NOEXCEPT 3645 {return __cntrl_ ? __cntrl_->use_count() : 0;} 3646 _LIBCPP_INLINE_VISIBILITY 3647 bool expired() const _NOEXCEPT 3648 {return __cntrl_ == nullptr || __cntrl_->use_count() == 0;} 3649 shared_ptr<_Tp> lock() const _NOEXCEPT; 3650 template<class _Up> 3651 _LIBCPP_INLINE_VISIBILITY 3652 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 3653 {return __cntrl_ < __r.__cntrl_;} 3654 template<class _Up> 3655 _LIBCPP_INLINE_VISIBILITY 3656 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 3657 {return __cntrl_ < __r.__cntrl_;} 3658 3659 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3660 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3661}; 3662 3663#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 3664template<class _Tp> 3665weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>; 3666#endif 3667 3668template<class _Tp> 3669inline 3670_LIBCPP_CONSTEXPR 3671weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 3672 : __ptr_(nullptr), 3673 __cntrl_(nullptr) 3674{ 3675} 3676 3677template<class _Tp> 3678inline 3679weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 3680 : __ptr_(__r.__ptr_), 3681 __cntrl_(__r.__cntrl_) 3682{ 3683 if (__cntrl_) 3684 __cntrl_->__add_weak(); 3685} 3686 3687template<class _Tp> 3688template<class _Yp> 3689inline 3690weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 3691 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3692 _NOEXCEPT 3693 : __ptr_(__r.__ptr_), 3694 __cntrl_(__r.__cntrl_) 3695{ 3696 if (__cntrl_) 3697 __cntrl_->__add_weak(); 3698} 3699 3700template<class _Tp> 3701template<class _Yp> 3702inline 3703weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 3704 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3705 _NOEXCEPT 3706 : __ptr_(__r.__ptr_), 3707 __cntrl_(__r.__cntrl_) 3708{ 3709 if (__cntrl_) 3710 __cntrl_->__add_weak(); 3711} 3712 3713template<class _Tp> 3714inline 3715weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 3716 : __ptr_(__r.__ptr_), 3717 __cntrl_(__r.__cntrl_) 3718{ 3719 __r.__ptr_ = nullptr; 3720 __r.__cntrl_ = nullptr; 3721} 3722 3723template<class _Tp> 3724template<class _Yp> 3725inline 3726weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 3727 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3728 _NOEXCEPT 3729 : __ptr_(__r.__ptr_), 3730 __cntrl_(__r.__cntrl_) 3731{ 3732 __r.__ptr_ = nullptr; 3733 __r.__cntrl_ = nullptr; 3734} 3735 3736template<class _Tp> 3737weak_ptr<_Tp>::~weak_ptr() 3738{ 3739 if (__cntrl_) 3740 __cntrl_->__release_weak(); 3741} 3742 3743template<class _Tp> 3744inline 3745weak_ptr<_Tp>& 3746weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 3747{ 3748 weak_ptr(__r).swap(*this); 3749 return *this; 3750} 3751 3752template<class _Tp> 3753template<class _Yp> 3754inline 3755typename enable_if 3756< 3757 is_convertible<_Yp*, _Tp*>::value, 3758 weak_ptr<_Tp>& 3759>::type 3760weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 3761{ 3762 weak_ptr(__r).swap(*this); 3763 return *this; 3764} 3765 3766template<class _Tp> 3767inline 3768weak_ptr<_Tp>& 3769weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 3770{ 3771 weak_ptr(_VSTD::move(__r)).swap(*this); 3772 return *this; 3773} 3774 3775template<class _Tp> 3776template<class _Yp> 3777inline 3778typename enable_if 3779< 3780 is_convertible<_Yp*, _Tp*>::value, 3781 weak_ptr<_Tp>& 3782>::type 3783weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 3784{ 3785 weak_ptr(_VSTD::move(__r)).swap(*this); 3786 return *this; 3787} 3788 3789template<class _Tp> 3790template<class _Yp> 3791inline 3792typename enable_if 3793< 3794 is_convertible<_Yp*, _Tp*>::value, 3795 weak_ptr<_Tp>& 3796>::type 3797weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 3798{ 3799 weak_ptr(__r).swap(*this); 3800 return *this; 3801} 3802 3803template<class _Tp> 3804inline 3805void 3806weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 3807{ 3808 _VSTD::swap(__ptr_, __r.__ptr_); 3809 _VSTD::swap(__cntrl_, __r.__cntrl_); 3810} 3811 3812template<class _Tp> 3813inline _LIBCPP_INLINE_VISIBILITY 3814void 3815swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 3816{ 3817 __x.swap(__y); 3818} 3819 3820template<class _Tp> 3821inline 3822void 3823weak_ptr<_Tp>::reset() _NOEXCEPT 3824{ 3825 weak_ptr().swap(*this); 3826} 3827 3828template<class _Tp> 3829template<class _Yp> 3830shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 3831 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3832 : __ptr_(__r.__ptr_), 3833 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 3834{ 3835 if (__cntrl_ == nullptr) 3836 __throw_bad_weak_ptr(); 3837} 3838 3839template<class _Tp> 3840shared_ptr<_Tp> 3841weak_ptr<_Tp>::lock() const _NOEXCEPT 3842{ 3843 shared_ptr<_Tp> __r; 3844 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 3845 if (__r.__cntrl_) 3846 __r.__ptr_ = __ptr_; 3847 return __r; 3848} 3849 3850#if _LIBCPP_STD_VER > 14 3851template <class _Tp = void> struct owner_less; 3852#else 3853template <class _Tp> struct owner_less; 3854#endif 3855 3856template <class _Tp> 3857struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 3858 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 3859{ 3860 typedef bool result_type; 3861 _LIBCPP_INLINE_VISIBILITY 3862 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3863 {return __x.owner_before(__y);} 3864 _LIBCPP_INLINE_VISIBILITY 3865 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3866 {return __x.owner_before(__y);} 3867 _LIBCPP_INLINE_VISIBILITY 3868 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3869 {return __x.owner_before(__y);} 3870}; 3871 3872template <class _Tp> 3873struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 3874 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 3875{ 3876 typedef bool result_type; 3877 _LIBCPP_INLINE_VISIBILITY 3878 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3879 {return __x.owner_before(__y);} 3880 _LIBCPP_INLINE_VISIBILITY 3881 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3882 {return __x.owner_before(__y);} 3883 _LIBCPP_INLINE_VISIBILITY 3884 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3885 {return __x.owner_before(__y);} 3886}; 3887 3888#if _LIBCPP_STD_VER > 14 3889template <> 3890struct _LIBCPP_TEMPLATE_VIS owner_less<void> 3891{ 3892 template <class _Tp, class _Up> 3893 _LIBCPP_INLINE_VISIBILITY 3894 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 3895 {return __x.owner_before(__y);} 3896 template <class _Tp, class _Up> 3897 _LIBCPP_INLINE_VISIBILITY 3898 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 3899 {return __x.owner_before(__y);} 3900 template <class _Tp, class _Up> 3901 _LIBCPP_INLINE_VISIBILITY 3902 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 3903 {return __x.owner_before(__y);} 3904 template <class _Tp, class _Up> 3905 _LIBCPP_INLINE_VISIBILITY 3906 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 3907 {return __x.owner_before(__y);} 3908 typedef void is_transparent; 3909}; 3910#endif 3911 3912template<class _Tp> 3913class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 3914{ 3915 mutable weak_ptr<_Tp> __weak_this_; 3916protected: 3917 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 3918 enable_shared_from_this() _NOEXCEPT {} 3919 _LIBCPP_INLINE_VISIBILITY 3920 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 3921 _LIBCPP_INLINE_VISIBILITY 3922 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 3923 {return *this;} 3924 _LIBCPP_INLINE_VISIBILITY 3925 ~enable_shared_from_this() {} 3926public: 3927 _LIBCPP_INLINE_VISIBILITY 3928 shared_ptr<_Tp> shared_from_this() 3929 {return shared_ptr<_Tp>(__weak_this_);} 3930 _LIBCPP_INLINE_VISIBILITY 3931 shared_ptr<_Tp const> shared_from_this() const 3932 {return shared_ptr<const _Tp>(__weak_this_);} 3933 3934#if _LIBCPP_STD_VER > 14 3935 _LIBCPP_INLINE_VISIBILITY 3936 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 3937 { return __weak_this_; } 3938 3939 _LIBCPP_INLINE_VISIBILITY 3940 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 3941 { return __weak_this_; } 3942#endif // _LIBCPP_STD_VER > 14 3943 3944 template <class _Up> friend class shared_ptr; 3945}; 3946 3947template <class _Tp> 3948struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 3949{ 3950 typedef shared_ptr<_Tp> argument_type; 3951 typedef size_t result_type; 3952 3953 _LIBCPP_INLINE_VISIBILITY 3954 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 3955 { 3956 return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get()); 3957 } 3958}; 3959 3960template<class _CharT, class _Traits, class _Yp> 3961inline _LIBCPP_INLINE_VISIBILITY 3962basic_ostream<_CharT, _Traits>& 3963operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 3964 3965 3966#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 3967 3968class _LIBCPP_TYPE_VIS __sp_mut 3969{ 3970 void* __lx; 3971public: 3972 void lock() _NOEXCEPT; 3973 void unlock() _NOEXCEPT; 3974 3975private: 3976 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 3977 __sp_mut(const __sp_mut&); 3978 __sp_mut& operator=(const __sp_mut&); 3979 3980 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 3981}; 3982 3983_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3984__sp_mut& __get_sp_mut(const void*); 3985 3986template <class _Tp> 3987inline _LIBCPP_INLINE_VISIBILITY 3988bool 3989atomic_is_lock_free(const shared_ptr<_Tp>*) 3990{ 3991 return false; 3992} 3993 3994template <class _Tp> 3995_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3996shared_ptr<_Tp> 3997atomic_load(const shared_ptr<_Tp>* __p) 3998{ 3999 __sp_mut& __m = __get_sp_mut(__p); 4000 __m.lock(); 4001 shared_ptr<_Tp> __q = *__p; 4002 __m.unlock(); 4003 return __q; 4004} 4005 4006template <class _Tp> 4007inline _LIBCPP_INLINE_VISIBILITY 4008_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4009shared_ptr<_Tp> 4010atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 4011{ 4012 return atomic_load(__p); 4013} 4014 4015template <class _Tp> 4016_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4017void 4018atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 4019{ 4020 __sp_mut& __m = __get_sp_mut(__p); 4021 __m.lock(); 4022 __p->swap(__r); 4023 __m.unlock(); 4024} 4025 4026template <class _Tp> 4027inline _LIBCPP_INLINE_VISIBILITY 4028_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4029void 4030atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4031{ 4032 atomic_store(__p, __r); 4033} 4034 4035template <class _Tp> 4036_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4037shared_ptr<_Tp> 4038atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 4039{ 4040 __sp_mut& __m = __get_sp_mut(__p); 4041 __m.lock(); 4042 __p->swap(__r); 4043 __m.unlock(); 4044 return __r; 4045} 4046 4047template <class _Tp> 4048inline _LIBCPP_INLINE_VISIBILITY 4049_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4050shared_ptr<_Tp> 4051atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4052{ 4053 return atomic_exchange(__p, __r); 4054} 4055 4056template <class _Tp> 4057_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4058bool 4059atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4060{ 4061 shared_ptr<_Tp> __temp; 4062 __sp_mut& __m = __get_sp_mut(__p); 4063 __m.lock(); 4064 if (__p->__owner_equivalent(*__v)) 4065 { 4066 _VSTD::swap(__temp, *__p); 4067 *__p = __w; 4068 __m.unlock(); 4069 return true; 4070 } 4071 _VSTD::swap(__temp, *__v); 4072 *__v = *__p; 4073 __m.unlock(); 4074 return false; 4075} 4076 4077template <class _Tp> 4078inline _LIBCPP_INLINE_VISIBILITY 4079_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4080bool 4081atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4082{ 4083 return atomic_compare_exchange_strong(__p, __v, __w); 4084} 4085 4086template <class _Tp> 4087inline _LIBCPP_INLINE_VISIBILITY 4088_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4089bool 4090atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4091 shared_ptr<_Tp> __w, memory_order, memory_order) 4092{ 4093 return atomic_compare_exchange_strong(__p, __v, __w); 4094} 4095 4096template <class _Tp> 4097inline _LIBCPP_INLINE_VISIBILITY 4098_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4099bool 4100atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4101 shared_ptr<_Tp> __w, memory_order, memory_order) 4102{ 4103 return atomic_compare_exchange_weak(__p, __v, __w); 4104} 4105 4106#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 4107 4108//enum class 4109#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 4110# ifndef _LIBCPP_CXX03_LANG 4111enum class pointer_safety : unsigned char { 4112 relaxed, 4113 preferred, 4114 strict 4115}; 4116# endif 4117#else 4118struct _LIBCPP_TYPE_VIS pointer_safety 4119{ 4120 enum __lx 4121 { 4122 relaxed, 4123 preferred, 4124 strict 4125 }; 4126 4127 __lx __v_; 4128 4129 _LIBCPP_INLINE_VISIBILITY 4130 pointer_safety() : __v_() {} 4131 4132 _LIBCPP_INLINE_VISIBILITY 4133 pointer_safety(__lx __v) : __v_(__v) {} 4134 _LIBCPP_INLINE_VISIBILITY 4135 operator int() const {return __v_;} 4136}; 4137#endif 4138 4139#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 4140 defined(_LIBCPP_BUILDING_LIBRARY) 4141_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 4142#else 4143// This function is only offered in C++03 under ABI v1. 4144# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 4145inline _LIBCPP_INLINE_VISIBILITY 4146pointer_safety get_pointer_safety() _NOEXCEPT { 4147 return pointer_safety::relaxed; 4148} 4149# endif 4150#endif 4151 4152 4153_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 4154_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 4155_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 4156_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 4157 4158template <class _Tp> 4159inline _LIBCPP_INLINE_VISIBILITY 4160_Tp* 4161undeclare_reachable(_Tp* __p) 4162{ 4163 return static_cast<_Tp*>(__undeclare_reachable(__p)); 4164} 4165 4166_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 4167 4168// --- Helper for container swap -- 4169template <typename _Alloc> 4170_LIBCPP_INLINE_VISIBILITY 4171void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 4172#if _LIBCPP_STD_VER >= 14 4173 _NOEXCEPT 4174#else 4175 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4176#endif 4177{ 4178 using _VSTD::swap; 4179 swap(__a1, __a2); 4180} 4181 4182template <typename _Alloc> 4183inline _LIBCPP_INLINE_VISIBILITY 4184void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 4185 4186template <typename _Alloc> 4187inline _LIBCPP_INLINE_VISIBILITY 4188void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 4189#if _LIBCPP_STD_VER >= 14 4190 _NOEXCEPT 4191#else 4192 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4193#endif 4194{ 4195 _VSTD::__swap_allocator(__a1, __a2, 4196 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 4197} 4198 4199template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 4200struct __noexcept_move_assign_container : public integral_constant<bool, 4201 _Traits::propagate_on_container_move_assignment::value 4202#if _LIBCPP_STD_VER > 14 4203 || _Traits::is_always_equal::value 4204#else 4205 && is_nothrow_move_assignable<_Alloc>::value 4206#endif 4207 > {}; 4208 4209 4210template <class _Tp, class _Alloc> 4211struct __temp_value { 4212 typedef allocator_traits<_Alloc> _Traits; 4213 4214 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 4215 _Alloc &__a; 4216 4217 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 4218 _Tp & get() { return *__addr(); } 4219 4220 template<class... _Args> 4221 _LIBCPP_NO_CFI 4222 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 4223 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 4224 _VSTD::forward<_Args>(__args)...); 4225 } 4226 4227 ~__temp_value() { _Traits::destroy(__a, __addr()); } 4228 }; 4229 4230template<typename _Alloc, typename = void, typename = void> 4231struct __is_allocator : false_type {}; 4232 4233template<typename _Alloc> 4234struct __is_allocator<_Alloc, 4235 typename __void_t<typename _Alloc::value_type>::type, 4236 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 4237 > 4238 : true_type {}; 4239 4240// __builtin_new_allocator -- A non-templated helper for allocating and 4241// deallocating memory using __builtin_operator_new and 4242// __builtin_operator_delete. It should be used in preference to 4243// `std::allocator<T>` to avoid additional instantiations. 4244struct __builtin_new_allocator { 4245 struct __builtin_new_deleter { 4246 typedef void* pointer_type; 4247 4248 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 4249 : __size_(__size), __align_(__align) {} 4250 4251 void operator()(void* p) const _NOEXCEPT { 4252 _VSTD::__libcpp_deallocate(p, __size_, __align_); 4253 } 4254 4255 private: 4256 size_t __size_; 4257 size_t __align_; 4258 }; 4259 4260 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 4261 4262 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 4263 return __holder_t(_VSTD::__libcpp_allocate(__s, __align), 4264 __builtin_new_deleter(__s, __align)); 4265 } 4266 4267 static void __deallocate_bytes(void* __p, size_t __s, 4268 size_t __align) _NOEXCEPT { 4269 _VSTD::__libcpp_deallocate(__p, __s, __align); 4270 } 4271 4272 template <class _Tp> 4273 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 4274 static __holder_t __allocate_type(size_t __n) { 4275 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 4276 } 4277 4278 template <class _Tp> 4279 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 4280 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 4281 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 4282 } 4283}; 4284 4285 4286_LIBCPP_END_NAMESPACE_STD 4287 4288_LIBCPP_POP_MACROS 4289 4290#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 4291# include <__pstl_memory> 4292#endif 4293 4294#endif // _LIBCPP_MEMORY 4295