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> // deprecated in C++17, removed in C++20 103{ 104public: 105 typedef void* pointer; 106 typedef const void* const_pointer; 107 typedef void value_type; 108 109 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 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 <compare> 672#include <cstddef> 673#include <cstdint> 674#include <new> 675#include <utility> 676#include <limits> 677#include <iterator> 678#include <__functional_base> 679#include <iosfwd> 680#include <tuple> 681#include <stdexcept> 682#include <cstring> 683#include <__memory/allocator_traits.h> 684#include <__memory/base.h> 685#include <__memory/pointer_traits.h> 686#include <__memory/utilities.h> 687#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 688# include <atomic> 689#endif 690#include <version> 691 692#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 693#pragma GCC system_header 694#endif 695 696_LIBCPP_PUSH_MACROS 697#include <__undef_macros> 698 699 700_LIBCPP_BEGIN_NAMESPACE_STD 701 702template <class _ValueType> 703inline _LIBCPP_INLINE_VISIBILITY 704_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 705#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 706 defined(__ATOMIC_RELAXED) && \ 707 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 708 return __atomic_load_n(__value, __ATOMIC_RELAXED); 709#else 710 return *__value; 711#endif 712} 713 714template <class _ValueType> 715inline _LIBCPP_INLINE_VISIBILITY 716_ValueType __libcpp_acquire_load(_ValueType const* __value) { 717#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 718 defined(__ATOMIC_ACQUIRE) && \ 719 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 720 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 721#else 722 return *__value; 723#endif 724} 725 726template <class _Tp> class allocator; 727 728#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 729template <> 730class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<void> 731{ 732public: 733 typedef void* pointer; 734 typedef const void* const_pointer; 735 typedef void value_type; 736 737 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 738}; 739 740template <> 741class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<const void> 742{ 743public: 744 typedef const void* pointer; 745 typedef const void* const_pointer; 746 typedef const void value_type; 747 748 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 749}; 750#endif 751 752// allocator 753 754template <class _Tp> 755class _LIBCPP_TEMPLATE_VIS allocator 756{ 757public: 758 typedef size_t size_type; 759 typedef ptrdiff_t difference_type; 760 typedef _Tp value_type; 761 typedef true_type propagate_on_container_move_assignment; 762 typedef true_type is_always_equal; 763 764 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 765 allocator() _NOEXCEPT { } 766 767 template <class _Up> 768 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 769 allocator(const allocator<_Up>&) _NOEXCEPT { } 770 771 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 772 _Tp* allocate(size_t __n) { 773 if (__n > allocator_traits<allocator>::max_size(*this)) 774 __throw_length_error("allocator<T>::allocate(size_t n)" 775 " 'n' exceeds maximum supported size"); 776 if (__libcpp_is_constant_evaluated()) { 777 return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp))); 778 } else { 779 return static_cast<_Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 780 } 781 } 782 783 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 784 void deallocate(_Tp* __p, size_t __n) _NOEXCEPT { 785 if (__libcpp_is_constant_evaluated()) { 786 ::operator delete(__p); 787 } else { 788 _VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 789 } 790 } 791 792 // C++20 Removed members 793#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 794 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp* pointer; 795 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 796 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp& reference; 797 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 798 799 template <class _Up> 800 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 801 typedef allocator<_Up> other; 802 }; 803 804 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 805 pointer address(reference __x) const _NOEXCEPT { 806 return _VSTD::addressof(__x); 807 } 808 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 809 const_pointer address(const_reference __x) const _NOEXCEPT { 810 return _VSTD::addressof(__x); 811 } 812 813 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 814 _Tp* allocate(size_t __n, const void*) { 815 return allocate(__n); 816 } 817 818 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 819 return size_type(~0) / sizeof(_Tp); 820 } 821 822 template <class _Up, class... _Args> 823 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 824 void construct(_Up* __p, _Args&&... __args) { 825 ::new ((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 826 } 827 828 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 829 void destroy(pointer __p) { 830 __p->~_Tp(); 831 } 832#endif 833}; 834 835template <class _Tp> 836class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 837{ 838public: 839 typedef size_t size_type; 840 typedef ptrdiff_t difference_type; 841 typedef const _Tp value_type; 842 typedef true_type propagate_on_container_move_assignment; 843 typedef true_type is_always_equal; 844 845 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 846 allocator() _NOEXCEPT { } 847 848 template <class _Up> 849 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 850 allocator(const allocator<_Up>&) _NOEXCEPT { } 851 852 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 853 const _Tp* allocate(size_t __n) { 854 if (__n > allocator_traits<allocator>::max_size(*this)) 855 __throw_length_error("allocator<const T>::allocate(size_t n)" 856 " 'n' exceeds maximum supported size"); 857 if (__libcpp_is_constant_evaluated()) { 858 return static_cast<const _Tp*>(::operator new(__n * sizeof(_Tp))); 859 } else { 860 return static_cast<const _Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 861 } 862 } 863 864 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 865 void deallocate(const _Tp* __p, size_t __n) { 866 if (__libcpp_is_constant_evaluated()) { 867 ::operator delete(const_cast<_Tp*>(__p)); 868 } else { 869 _VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 870 } 871 } 872 873 // C++20 Removed members 874#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 875 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* pointer; 876 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 877 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& reference; 878 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 879 880 template <class _Up> 881 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 882 typedef allocator<_Up> other; 883 }; 884 885 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 886 const_pointer address(const_reference __x) const _NOEXCEPT { 887 return _VSTD::addressof(__x); 888 } 889 890 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 891 const _Tp* allocate(size_t __n, const void*) { 892 return allocate(__n); 893 } 894 895 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 896 return size_type(~0) / sizeof(_Tp); 897 } 898 899 template <class _Up, class... _Args> 900 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 901 void construct(_Up* __p, _Args&&... __args) { 902 ::new ((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 903 } 904 905 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 906 void destroy(pointer __p) { 907 __p->~_Tp(); 908 } 909#endif 910}; 911 912template <class _Tp, class _Up> 913inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 914bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 915 916template <class _Tp, class _Up> 917inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 918bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 919 920template <class _Alloc, class _Ptr> 921_LIBCPP_INLINE_VISIBILITY 922void __construct_forward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) { 923 static_assert(__is_cpp17_move_insertable<_Alloc>::value, 924 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 925 typedef allocator_traits<_Alloc> _Traits; 926 for (; __begin1 != __end1; ++__begin1, (void)++__begin2) { 927 _Traits::construct(__a, _VSTD::__to_address(__begin2), 928#ifdef _LIBCPP_NO_EXCEPTIONS 929 _VSTD::move(*__begin1) 930#else 931 _VSTD::move_if_noexcept(*__begin1) 932#endif 933 ); 934 } 935} 936 937template <class _Alloc, class _Tp, typename enable_if< 938 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && 939 is_trivially_move_constructible<_Tp>::value 940>::type> 941_LIBCPP_INLINE_VISIBILITY 942void __construct_forward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) { 943 ptrdiff_t _Np = __end1 - __begin1; 944 if (_Np > 0) { 945 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 946 __begin2 += _Np; 947 } 948} 949 950template <class _Alloc, class _Iter, class _Ptr> 951_LIBCPP_INLINE_VISIBILITY 952void __construct_range_forward(_Alloc& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) { 953 typedef allocator_traits<_Alloc> _Traits; 954 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) { 955 _Traits::construct(__a, _VSTD::__to_address(__begin2), *__begin1); 956 } 957} 958 959template <class _Alloc, class _Source, class _Dest, 960 class _RawSource = typename remove_const<_Source>::type, 961 class _RawDest = typename remove_const<_Dest>::type, 962 class = 963 typename enable_if< 964 is_trivially_copy_constructible<_Dest>::value && 965 is_same<_RawSource, _RawDest>::value && 966 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Dest*, _Source&>::value) 967 >::type> 968_LIBCPP_INLINE_VISIBILITY 969void __construct_range_forward(_Alloc&, _Source* __begin1, _Source* __end1, _Dest*& __begin2) { 970 ptrdiff_t _Np = __end1 - __begin1; 971 if (_Np > 0) { 972 _VSTD::memcpy(const_cast<_RawDest*>(__begin2), __begin1, _Np * sizeof(_Dest)); 973 __begin2 += _Np; 974 } 975} 976 977template <class _Alloc, class _Ptr> 978_LIBCPP_INLINE_VISIBILITY 979void __construct_backward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) { 980 static_assert(__is_cpp17_move_insertable<_Alloc>::value, 981 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 982 typedef allocator_traits<_Alloc> _Traits; 983 while (__end1 != __begin1) { 984 _Traits::construct(__a, _VSTD::__to_address(__end2 - 1), 985#ifdef _LIBCPP_NO_EXCEPTIONS 986 _VSTD::move(*--__end1) 987#else 988 _VSTD::move_if_noexcept(*--__end1) 989#endif 990 ); 991 --__end2; 992 } 993} 994 995template <class _Alloc, class _Tp, class = typename enable_if< 996 (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) && 997 is_trivially_move_constructible<_Tp>::value 998>::type> 999_LIBCPP_INLINE_VISIBILITY 1000void __construct_backward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) { 1001 ptrdiff_t _Np = __end1 - __begin1; 1002 __end2 -= _Np; 1003 if (_Np > 0) 1004 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1005} 1006 1007template <class _OutputIterator, class _Tp> 1008class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1009 : public iterator<output_iterator_tag, 1010 _Tp, // purposefully not C++03 1011 ptrdiff_t, // purposefully not C++03 1012 _Tp*, // purposefully not C++03 1013 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1014{ 1015private: 1016 _OutputIterator __x_; 1017public: 1018 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 1019 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 1020 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 1021 {::new ((void*)_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 1022#if _LIBCPP_STD_VER >= 14 1023 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 1024 {::new ((void*)_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 1025#endif 1026 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 1027 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 1028 {raw_storage_iterator __t(*this); ++__x_; return __t;} 1029#if _LIBCPP_STD_VER >= 14 1030 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 1031#endif 1032}; 1033 1034template <class _Tp> 1035_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 1036pair<_Tp*, ptrdiff_t> 1037get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 1038{ 1039 pair<_Tp*, ptrdiff_t> __r(0, 0); 1040 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 1041 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 1042 / sizeof(_Tp); 1043 if (__n > __m) 1044 __n = __m; 1045 while (__n > 0) 1046 { 1047#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 1048 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1049 { 1050 align_val_t __al = 1051 align_val_t(alignment_of<_Tp>::value); 1052 __r.first = static_cast<_Tp*>(::operator new( 1053 __n * sizeof(_Tp), __al, nothrow)); 1054 } else { 1055 __r.first = static_cast<_Tp*>(::operator new( 1056 __n * sizeof(_Tp), nothrow)); 1057 } 1058#else 1059 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1060 { 1061 // Since aligned operator new is unavailable, return an empty 1062 // buffer rather than one with invalid alignment. 1063 return __r; 1064 } 1065 1066 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 1067#endif 1068 1069 if (__r.first) 1070 { 1071 __r.second = __n; 1072 break; 1073 } 1074 __n /= 2; 1075 } 1076 return __r; 1077} 1078 1079template <class _Tp> 1080inline _LIBCPP_INLINE_VISIBILITY 1081void return_temporary_buffer(_Tp* __p) _NOEXCEPT 1082{ 1083 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 1084} 1085 1086#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1087template <class _Tp> 1088struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 1089{ 1090 _Tp* __ptr_; 1091}; 1092 1093template<class _Tp> 1094class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 1095{ 1096private: 1097 _Tp* __ptr_; 1098public: 1099 typedef _Tp element_type; 1100 1101 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} 1102 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 1103 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 1104 : __ptr_(__p.release()) {} 1105 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 1106 {reset(__p.release()); return *this;} 1107 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 1108 {reset(__p.release()); return *this;} 1109 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 1110 {reset(__p.__ptr_); return *this;} 1111 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 1112 1113 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 1114 {return *__ptr_;} 1115 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} 1116 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} 1117 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 1118 { 1119 _Tp* __t = __ptr_; 1120 __ptr_ = nullptr; 1121 return __t; 1122 } 1123 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 1124 { 1125 if (__ptr_ != __p) 1126 delete __ptr_; 1127 __ptr_ = __p; 1128 } 1129 1130 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 1131 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 1132 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 1133 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 1134 {return auto_ptr<_Up>(release());} 1135}; 1136 1137template <> 1138class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 1139{ 1140public: 1141 typedef void element_type; 1142}; 1143#endif 1144 1145// Tag used to default initialize one or both of the pair's elements. 1146struct __default_init_tag {}; 1147struct __value_init_tag {}; 1148 1149template <class _Tp, int _Idx, 1150 bool _CanBeEmptyBase = 1151 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 1152struct __compressed_pair_elem { 1153 typedef _Tp _ParamT; 1154 typedef _Tp& reference; 1155 typedef const _Tp& const_reference; 1156 1157 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1158 __compressed_pair_elem(__default_init_tag) {} 1159 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1160 __compressed_pair_elem(__value_init_tag) : __value_() {} 1161 1162 template <class _Up, class = typename enable_if< 1163 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 1164 >::type> 1165 _LIBCPP_INLINE_VISIBILITY 1166 _LIBCPP_CONSTEXPR explicit 1167 __compressed_pair_elem(_Up&& __u) 1168 : __value_(_VSTD::forward<_Up>(__u)) 1169 { 1170 } 1171 1172 1173#ifndef _LIBCPP_CXX03_LANG 1174 template <class... _Args, size_t... _Indexes> 1175 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1176 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 1177 __tuple_indices<_Indexes...>) 1178 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 1179#endif 1180 1181 1182 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 1183 _LIBCPP_INLINE_VISIBILITY 1184 const_reference __get() const _NOEXCEPT { return __value_; } 1185 1186private: 1187 _Tp __value_; 1188}; 1189 1190template <class _Tp, int _Idx> 1191struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 1192 typedef _Tp _ParamT; 1193 typedef _Tp& reference; 1194 typedef const _Tp& const_reference; 1195 typedef _Tp __value_type; 1196 1197 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __compressed_pair_elem() = default; 1198 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1199 __compressed_pair_elem(__default_init_tag) {} 1200 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1201 __compressed_pair_elem(__value_init_tag) : __value_type() {} 1202 1203 template <class _Up, class = typename enable_if< 1204 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 1205 >::type> 1206 _LIBCPP_INLINE_VISIBILITY 1207 _LIBCPP_CONSTEXPR explicit 1208 __compressed_pair_elem(_Up&& __u) 1209 : __value_type(_VSTD::forward<_Up>(__u)) 1210 {} 1211 1212#ifndef _LIBCPP_CXX03_LANG 1213 template <class... _Args, size_t... _Indexes> 1214 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1215 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 1216 __tuple_indices<_Indexes...>) 1217 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 1218#endif 1219 1220 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 1221 _LIBCPP_INLINE_VISIBILITY 1222 const_reference __get() const _NOEXCEPT { return *this; } 1223}; 1224 1225template <class _T1, class _T2> 1226class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 1227 private __compressed_pair_elem<_T2, 1> { 1228public: 1229 // NOTE: This static assert should never fire because __compressed_pair 1230 // is *almost never* used in a scenario where it's possible for T1 == T2. 1231 // (The exception is std::function where it is possible that the function 1232 // object and the allocator have the same type). 1233 static_assert((!is_same<_T1, _T2>::value), 1234 "__compressed_pair cannot be instantiated when T1 and T2 are the same type; " 1235 "The current implementation is NOT ABI-compatible with the previous " 1236 "implementation for this configuration"); 1237 1238 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 1239 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 1240 1241 template <bool _Dummy = true, 1242 class = typename enable_if< 1243 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 1244 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 1245 >::type 1246 > 1247 _LIBCPP_INLINE_VISIBILITY 1248 _LIBCPP_CONSTEXPR __compressed_pair() : _Base1(__value_init_tag()), _Base2(__value_init_tag()) {} 1249 1250 template <class _U1, class _U2> 1251 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1252 __compressed_pair(_U1&& __t1, _U2&& __t2) 1253 : _Base1(_VSTD::forward<_U1>(__t1)), _Base2(_VSTD::forward<_U2>(__t2)) {} 1254 1255#ifndef _LIBCPP_CXX03_LANG 1256 template <class... _Args1, class... _Args2> 1257 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1258 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 1259 tuple<_Args2...> __second_args) 1260 : _Base1(__pc, _VSTD::move(__first_args), 1261 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 1262 _Base2(__pc, _VSTD::move(__second_args), 1263 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 1264#endif 1265 1266 _LIBCPP_INLINE_VISIBILITY 1267 typename _Base1::reference first() _NOEXCEPT { 1268 return static_cast<_Base1&>(*this).__get(); 1269 } 1270 1271 _LIBCPP_INLINE_VISIBILITY 1272 typename _Base1::const_reference first() const _NOEXCEPT { 1273 return static_cast<_Base1 const&>(*this).__get(); 1274 } 1275 1276 _LIBCPP_INLINE_VISIBILITY 1277 typename _Base2::reference second() _NOEXCEPT { 1278 return static_cast<_Base2&>(*this).__get(); 1279 } 1280 1281 _LIBCPP_INLINE_VISIBILITY 1282 typename _Base2::const_reference second() const _NOEXCEPT { 1283 return static_cast<_Base2 const&>(*this).__get(); 1284 } 1285 1286 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1287 static _Base1* __get_first_base(__compressed_pair* __pair) _NOEXCEPT { 1288 return static_cast<_Base1*>(__pair); 1289 } 1290 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1291 static _Base2* __get_second_base(__compressed_pair* __pair) _NOEXCEPT { 1292 return static_cast<_Base2*>(__pair); 1293 } 1294 1295 _LIBCPP_INLINE_VISIBILITY 1296 void swap(__compressed_pair& __x) 1297 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 1298 __is_nothrow_swappable<_T2>::value) 1299 { 1300 using _VSTD::swap; 1301 swap(first(), __x.first()); 1302 swap(second(), __x.second()); 1303 } 1304}; 1305 1306template <class _T1, class _T2> 1307inline _LIBCPP_INLINE_VISIBILITY 1308void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 1309 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 1310 __is_nothrow_swappable<_T2>::value) { 1311 __x.swap(__y); 1312} 1313 1314// default_delete 1315 1316template <class _Tp> 1317struct _LIBCPP_TEMPLATE_VIS default_delete { 1318 static_assert(!is_function<_Tp>::value, 1319 "default_delete cannot be instantiated for function types"); 1320#ifndef _LIBCPP_CXX03_LANG 1321 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 1322#else 1323 _LIBCPP_INLINE_VISIBILITY default_delete() {} 1324#endif 1325 template <class _Up> 1326 _LIBCPP_INLINE_VISIBILITY 1327 default_delete(const default_delete<_Up>&, 1328 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 1329 0) _NOEXCEPT {} 1330 1331 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 1332 static_assert(sizeof(_Tp) > 0, 1333 "default_delete can not delete incomplete type"); 1334 static_assert(!is_void<_Tp>::value, 1335 "default_delete can not delete incomplete type"); 1336 delete __ptr; 1337 } 1338}; 1339 1340template <class _Tp> 1341struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 1342private: 1343 template <class _Up> 1344 struct _EnableIfConvertible 1345 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 1346 1347public: 1348#ifndef _LIBCPP_CXX03_LANG 1349 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 1350#else 1351 _LIBCPP_INLINE_VISIBILITY default_delete() {} 1352#endif 1353 1354 template <class _Up> 1355 _LIBCPP_INLINE_VISIBILITY 1356 default_delete(const default_delete<_Up[]>&, 1357 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 1358 1359 template <class _Up> 1360 _LIBCPP_INLINE_VISIBILITY 1361 typename _EnableIfConvertible<_Up>::type 1362 operator()(_Up* __ptr) const _NOEXCEPT { 1363 static_assert(sizeof(_Tp) > 0, 1364 "default_delete can not delete incomplete type"); 1365 static_assert(!is_void<_Tp>::value, 1366 "default_delete can not delete void type"); 1367 delete[] __ptr; 1368 } 1369}; 1370 1371template <class _Deleter> 1372struct __unique_ptr_deleter_sfinae { 1373 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 1374 typedef const _Deleter& __lval_ref_type; 1375 typedef _Deleter&& __good_rval_ref_type; 1376 typedef true_type __enable_rval_overload; 1377}; 1378 1379template <class _Deleter> 1380struct __unique_ptr_deleter_sfinae<_Deleter const&> { 1381 typedef const _Deleter& __lval_ref_type; 1382 typedef const _Deleter&& __bad_rval_ref_type; 1383 typedef false_type __enable_rval_overload; 1384}; 1385 1386template <class _Deleter> 1387struct __unique_ptr_deleter_sfinae<_Deleter&> { 1388 typedef _Deleter& __lval_ref_type; 1389 typedef _Deleter&& __bad_rval_ref_type; 1390 typedef false_type __enable_rval_overload; 1391}; 1392 1393#if defined(_LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI) 1394# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 1395#else 1396# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI 1397#endif 1398 1399template <class _Tp, class _Dp = default_delete<_Tp> > 1400class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr { 1401public: 1402 typedef _Tp element_type; 1403 typedef _Dp deleter_type; 1404 typedef _LIBCPP_NODEBUG_TYPE typename __pointer<_Tp, deleter_type>::type pointer; 1405 1406 static_assert(!is_rvalue_reference<deleter_type>::value, 1407 "the specified deleter type cannot be an rvalue reference"); 1408 1409private: 1410 __compressed_pair<pointer, deleter_type> __ptr_; 1411 1412 struct __nat { int __for_bool_; }; 1413 1414 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 1415 1416 template <bool _Dummy> 1417 using _LValRefType _LIBCPP_NODEBUG_TYPE = 1418 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 1419 1420 template <bool _Dummy> 1421 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 1422 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 1423 1424 template <bool _Dummy> 1425 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 1426 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 1427 1428 template <bool _Dummy, class _Deleter = typename __dependent_type< 1429 __identity<deleter_type>, _Dummy>::type> 1430 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 1431 typename enable_if<is_default_constructible<_Deleter>::value && 1432 !is_pointer<_Deleter>::value>::type; 1433 1434 template <class _ArgType> 1435 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 1436 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 1437 1438 template <class _UPtr, class _Up> 1439 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1440 is_convertible<typename _UPtr::pointer, pointer>::value && 1441 !is_array<_Up>::value 1442 >::type; 1443 1444 template <class _UDel> 1445 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1446 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 1447 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 1448 >::type; 1449 1450 template <class _UDel> 1451 using _EnableIfDeleterAssignable = typename enable_if< 1452 is_assignable<_Dp&, _UDel&&>::value 1453 >::type; 1454 1455public: 1456 template <bool _Dummy = true, 1457 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1458 _LIBCPP_INLINE_VISIBILITY 1459 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1460 1461 template <bool _Dummy = true, 1462 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1463 _LIBCPP_INLINE_VISIBILITY 1464 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1465 1466 template <bool _Dummy = true, 1467 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1468 _LIBCPP_INLINE_VISIBILITY 1469 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p, __default_init_tag()) {} 1470 1471 template <bool _Dummy = true, 1472 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 1473 _LIBCPP_INLINE_VISIBILITY 1474 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 1475 : __ptr_(__p, __d) {} 1476 1477 template <bool _Dummy = true, 1478 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 1479 _LIBCPP_INLINE_VISIBILITY 1480 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1481 : __ptr_(__p, _VSTD::move(__d)) { 1482 static_assert(!is_reference<deleter_type>::value, 1483 "rvalue deleter bound to reference"); 1484 } 1485 1486 template <bool _Dummy = true, 1487 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 1488 _LIBCPP_INLINE_VISIBILITY 1489 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 1490 1491 _LIBCPP_INLINE_VISIBILITY 1492 unique_ptr(unique_ptr&& __u) _NOEXCEPT 1493 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 1494 } 1495 1496 template <class _Up, class _Ep, 1497 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1498 class = _EnableIfDeleterConvertible<_Ep> 1499 > 1500 _LIBCPP_INLINE_VISIBILITY 1501 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 1502 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 1503 1504#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1505 template <class _Up> 1506 _LIBCPP_INLINE_VISIBILITY 1507 unique_ptr(auto_ptr<_Up>&& __p, 1508 typename enable_if<is_convertible<_Up*, _Tp*>::value && 1509 is_same<_Dp, default_delete<_Tp> >::value, 1510 __nat>::type = __nat()) _NOEXCEPT 1511 : __ptr_(__p.release(), __default_init_tag()) {} 1512#endif 1513 1514 _LIBCPP_INLINE_VISIBILITY 1515 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 1516 reset(__u.release()); 1517 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 1518 return *this; 1519 } 1520 1521 template <class _Up, class _Ep, 1522 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1523 class = _EnableIfDeleterAssignable<_Ep> 1524 > 1525 _LIBCPP_INLINE_VISIBILITY 1526 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 1527 reset(__u.release()); 1528 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 1529 return *this; 1530 } 1531 1532#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1533 template <class _Up> 1534 _LIBCPP_INLINE_VISIBILITY 1535 typename enable_if<is_convertible<_Up*, _Tp*>::value && 1536 is_same<_Dp, default_delete<_Tp> >::value, 1537 unique_ptr&>::type 1538 operator=(auto_ptr<_Up> __p) { 1539 reset(__p.release()); 1540 return *this; 1541 } 1542#endif 1543 1544#ifdef _LIBCPP_CXX03_LANG 1545 unique_ptr(unique_ptr const&) = delete; 1546 unique_ptr& operator=(unique_ptr const&) = delete; 1547#endif 1548 1549 1550 _LIBCPP_INLINE_VISIBILITY 1551 ~unique_ptr() { reset(); } 1552 1553 _LIBCPP_INLINE_VISIBILITY 1554 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 1555 reset(); 1556 return *this; 1557 } 1558 1559 _LIBCPP_INLINE_VISIBILITY 1560 typename add_lvalue_reference<_Tp>::type 1561 operator*() const { 1562 return *__ptr_.first(); 1563 } 1564 _LIBCPP_INLINE_VISIBILITY 1565 pointer operator->() const _NOEXCEPT { 1566 return __ptr_.first(); 1567 } 1568 _LIBCPP_INLINE_VISIBILITY 1569 pointer get() const _NOEXCEPT { 1570 return __ptr_.first(); 1571 } 1572 _LIBCPP_INLINE_VISIBILITY 1573 deleter_type& get_deleter() _NOEXCEPT { 1574 return __ptr_.second(); 1575 } 1576 _LIBCPP_INLINE_VISIBILITY 1577 const deleter_type& get_deleter() const _NOEXCEPT { 1578 return __ptr_.second(); 1579 } 1580 _LIBCPP_INLINE_VISIBILITY 1581 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 1582 return __ptr_.first() != nullptr; 1583 } 1584 1585 _LIBCPP_INLINE_VISIBILITY 1586 pointer release() _NOEXCEPT { 1587 pointer __t = __ptr_.first(); 1588 __ptr_.first() = pointer(); 1589 return __t; 1590 } 1591 1592 _LIBCPP_INLINE_VISIBILITY 1593 void reset(pointer __p = pointer()) _NOEXCEPT { 1594 pointer __tmp = __ptr_.first(); 1595 __ptr_.first() = __p; 1596 if (__tmp) 1597 __ptr_.second()(__tmp); 1598 } 1599 1600 _LIBCPP_INLINE_VISIBILITY 1601 void swap(unique_ptr& __u) _NOEXCEPT { 1602 __ptr_.swap(__u.__ptr_); 1603 } 1604}; 1605 1606 1607template <class _Tp, class _Dp> 1608class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 1609public: 1610 typedef _Tp element_type; 1611 typedef _Dp deleter_type; 1612 typedef typename __pointer<_Tp, deleter_type>::type pointer; 1613 1614private: 1615 __compressed_pair<pointer, deleter_type> __ptr_; 1616 1617 template <class _From> 1618 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 1619 1620 template <class _FromElem> 1621 struct _CheckArrayPointerConversion<_FromElem*> 1622 : integral_constant<bool, 1623 is_same<_FromElem*, pointer>::value || 1624 (is_same<pointer, element_type*>::value && 1625 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 1626 > 1627 {}; 1628 1629 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 1630 1631 template <bool _Dummy> 1632 using _LValRefType _LIBCPP_NODEBUG_TYPE = 1633 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 1634 1635 template <bool _Dummy> 1636 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 1637 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 1638 1639 template <bool _Dummy> 1640 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 1641 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 1642 1643 template <bool _Dummy, class _Deleter = typename __dependent_type< 1644 __identity<deleter_type>, _Dummy>::type> 1645 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 1646 typename enable_if<is_default_constructible<_Deleter>::value && 1647 !is_pointer<_Deleter>::value>::type; 1648 1649 template <class _ArgType> 1650 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 1651 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 1652 1653 template <class _Pp> 1654 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1655 _CheckArrayPointerConversion<_Pp>::value 1656 >::type; 1657 1658 template <class _UPtr, class _Up, 1659 class _ElemT = typename _UPtr::element_type> 1660 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1661 is_array<_Up>::value && 1662 is_same<pointer, element_type*>::value && 1663 is_same<typename _UPtr::pointer, _ElemT*>::value && 1664 is_convertible<_ElemT(*)[], element_type(*)[]>::value 1665 >::type; 1666 1667 template <class _UDel> 1668 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 1669 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 1670 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 1671 >::type; 1672 1673 template <class _UDel> 1674 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 1675 is_assignable<_Dp&, _UDel&&>::value 1676 >::type; 1677 1678public: 1679 template <bool _Dummy = true, 1680 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1681 _LIBCPP_INLINE_VISIBILITY 1682 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1683 1684 template <bool _Dummy = true, 1685 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 1686 _LIBCPP_INLINE_VISIBILITY 1687 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 1688 1689 template <class _Pp, bool _Dummy = true, 1690 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 1691 class = _EnableIfPointerConvertible<_Pp> > 1692 _LIBCPP_INLINE_VISIBILITY 1693 explicit unique_ptr(_Pp __p) _NOEXCEPT 1694 : __ptr_(__p, __default_init_tag()) {} 1695 1696 template <class _Pp, bool _Dummy = true, 1697 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 1698 class = _EnableIfPointerConvertible<_Pp> > 1699 _LIBCPP_INLINE_VISIBILITY 1700 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 1701 : __ptr_(__p, __d) {} 1702 1703 template <bool _Dummy = true, 1704 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 1705 _LIBCPP_INLINE_VISIBILITY 1706 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 1707 : __ptr_(nullptr, __d) {} 1708 1709 template <class _Pp, bool _Dummy = true, 1710 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 1711 class = _EnableIfPointerConvertible<_Pp> > 1712 _LIBCPP_INLINE_VISIBILITY 1713 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1714 : __ptr_(__p, _VSTD::move(__d)) { 1715 static_assert(!is_reference<deleter_type>::value, 1716 "rvalue deleter bound to reference"); 1717 } 1718 1719 template <bool _Dummy = true, 1720 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 1721 _LIBCPP_INLINE_VISIBILITY 1722 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 1723 : __ptr_(nullptr, _VSTD::move(__d)) { 1724 static_assert(!is_reference<deleter_type>::value, 1725 "rvalue deleter bound to reference"); 1726 } 1727 1728 template <class _Pp, bool _Dummy = true, 1729 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 1730 class = _EnableIfPointerConvertible<_Pp> > 1731 _LIBCPP_INLINE_VISIBILITY 1732 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 1733 1734 _LIBCPP_INLINE_VISIBILITY 1735 unique_ptr(unique_ptr&& __u) _NOEXCEPT 1736 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 1737 } 1738 1739 _LIBCPP_INLINE_VISIBILITY 1740 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 1741 reset(__u.release()); 1742 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 1743 return *this; 1744 } 1745 1746 template <class _Up, class _Ep, 1747 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1748 class = _EnableIfDeleterConvertible<_Ep> 1749 > 1750 _LIBCPP_INLINE_VISIBILITY 1751 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 1752 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 1753 } 1754 1755 template <class _Up, class _Ep, 1756 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 1757 class = _EnableIfDeleterAssignable<_Ep> 1758 > 1759 _LIBCPP_INLINE_VISIBILITY 1760 unique_ptr& 1761 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 1762 reset(__u.release()); 1763 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 1764 return *this; 1765 } 1766 1767#ifdef _LIBCPP_CXX03_LANG 1768 unique_ptr(unique_ptr const&) = delete; 1769 unique_ptr& operator=(unique_ptr const&) = delete; 1770#endif 1771 1772public: 1773 _LIBCPP_INLINE_VISIBILITY 1774 ~unique_ptr() { reset(); } 1775 1776 _LIBCPP_INLINE_VISIBILITY 1777 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 1778 reset(); 1779 return *this; 1780 } 1781 1782 _LIBCPP_INLINE_VISIBILITY 1783 typename add_lvalue_reference<_Tp>::type 1784 operator[](size_t __i) const { 1785 return __ptr_.first()[__i]; 1786 } 1787 _LIBCPP_INLINE_VISIBILITY 1788 pointer get() const _NOEXCEPT { 1789 return __ptr_.first(); 1790 } 1791 1792 _LIBCPP_INLINE_VISIBILITY 1793 deleter_type& get_deleter() _NOEXCEPT { 1794 return __ptr_.second(); 1795 } 1796 1797 _LIBCPP_INLINE_VISIBILITY 1798 const deleter_type& get_deleter() const _NOEXCEPT { 1799 return __ptr_.second(); 1800 } 1801 _LIBCPP_INLINE_VISIBILITY 1802 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 1803 return __ptr_.first() != nullptr; 1804 } 1805 1806 _LIBCPP_INLINE_VISIBILITY 1807 pointer release() _NOEXCEPT { 1808 pointer __t = __ptr_.first(); 1809 __ptr_.first() = pointer(); 1810 return __t; 1811 } 1812 1813 template <class _Pp> 1814 _LIBCPP_INLINE_VISIBILITY 1815 typename enable_if< 1816 _CheckArrayPointerConversion<_Pp>::value 1817 >::type 1818 reset(_Pp __p) _NOEXCEPT { 1819 pointer __tmp = __ptr_.first(); 1820 __ptr_.first() = __p; 1821 if (__tmp) 1822 __ptr_.second()(__tmp); 1823 } 1824 1825 _LIBCPP_INLINE_VISIBILITY 1826 void reset(nullptr_t = nullptr) _NOEXCEPT { 1827 pointer __tmp = __ptr_.first(); 1828 __ptr_.first() = nullptr; 1829 if (__tmp) 1830 __ptr_.second()(__tmp); 1831 } 1832 1833 _LIBCPP_INLINE_VISIBILITY 1834 void swap(unique_ptr& __u) _NOEXCEPT { 1835 __ptr_.swap(__u.__ptr_); 1836 } 1837 1838}; 1839 1840template <class _Tp, class _Dp> 1841inline _LIBCPP_INLINE_VISIBILITY 1842typename enable_if< 1843 __is_swappable<_Dp>::value, 1844 void 1845>::type 1846swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 1847 1848template <class _T1, class _D1, class _T2, class _D2> 1849inline _LIBCPP_INLINE_VISIBILITY 1850bool 1851operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 1852 1853template <class _T1, class _D1, class _T2, class _D2> 1854inline _LIBCPP_INLINE_VISIBILITY 1855bool 1856operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 1857 1858template <class _T1, class _D1, class _T2, class _D2> 1859inline _LIBCPP_INLINE_VISIBILITY 1860bool 1861operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 1862{ 1863 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1864 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 1865 typedef typename common_type<_P1, _P2>::type _Vp; 1866 return less<_Vp>()(__x.get(), __y.get()); 1867} 1868 1869template <class _T1, class _D1, class _T2, class _D2> 1870inline _LIBCPP_INLINE_VISIBILITY 1871bool 1872operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 1873 1874template <class _T1, class _D1, class _T2, class _D2> 1875inline _LIBCPP_INLINE_VISIBILITY 1876bool 1877operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 1878 1879template <class _T1, class _D1, class _T2, class _D2> 1880inline _LIBCPP_INLINE_VISIBILITY 1881bool 1882operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 1883 1884template <class _T1, class _D1> 1885inline _LIBCPP_INLINE_VISIBILITY 1886bool 1887operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 1888{ 1889 return !__x; 1890} 1891 1892template <class _T1, class _D1> 1893inline _LIBCPP_INLINE_VISIBILITY 1894bool 1895operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 1896{ 1897 return !__x; 1898} 1899 1900template <class _T1, class _D1> 1901inline _LIBCPP_INLINE_VISIBILITY 1902bool 1903operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 1904{ 1905 return static_cast<bool>(__x); 1906} 1907 1908template <class _T1, class _D1> 1909inline _LIBCPP_INLINE_VISIBILITY 1910bool 1911operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 1912{ 1913 return static_cast<bool>(__x); 1914} 1915 1916template <class _T1, class _D1> 1917inline _LIBCPP_INLINE_VISIBILITY 1918bool 1919operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1920{ 1921 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1922 return less<_P1>()(__x.get(), nullptr); 1923} 1924 1925template <class _T1, class _D1> 1926inline _LIBCPP_INLINE_VISIBILITY 1927bool 1928operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 1929{ 1930 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 1931 return less<_P1>()(nullptr, __x.get()); 1932} 1933 1934template <class _T1, class _D1> 1935inline _LIBCPP_INLINE_VISIBILITY 1936bool 1937operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1938{ 1939 return nullptr < __x; 1940} 1941 1942template <class _T1, class _D1> 1943inline _LIBCPP_INLINE_VISIBILITY 1944bool 1945operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 1946{ 1947 return __x < nullptr; 1948} 1949 1950template <class _T1, class _D1> 1951inline _LIBCPP_INLINE_VISIBILITY 1952bool 1953operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1954{ 1955 return !(nullptr < __x); 1956} 1957 1958template <class _T1, class _D1> 1959inline _LIBCPP_INLINE_VISIBILITY 1960bool 1961operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 1962{ 1963 return !(__x < nullptr); 1964} 1965 1966template <class _T1, class _D1> 1967inline _LIBCPP_INLINE_VISIBILITY 1968bool 1969operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 1970{ 1971 return !(__x < nullptr); 1972} 1973 1974template <class _T1, class _D1> 1975inline _LIBCPP_INLINE_VISIBILITY 1976bool 1977operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 1978{ 1979 return !(nullptr < __x); 1980} 1981 1982#if _LIBCPP_STD_VER > 11 1983 1984template<class _Tp> 1985struct __unique_if 1986{ 1987 typedef unique_ptr<_Tp> __unique_single; 1988}; 1989 1990template<class _Tp> 1991struct __unique_if<_Tp[]> 1992{ 1993 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 1994}; 1995 1996template<class _Tp, size_t _Np> 1997struct __unique_if<_Tp[_Np]> 1998{ 1999 typedef void __unique_array_known_bound; 2000}; 2001 2002template<class _Tp, class... _Args> 2003inline _LIBCPP_INLINE_VISIBILITY 2004typename __unique_if<_Tp>::__unique_single 2005make_unique(_Args&&... __args) 2006{ 2007 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 2008} 2009 2010template<class _Tp> 2011inline _LIBCPP_INLINE_VISIBILITY 2012typename __unique_if<_Tp>::__unique_array_unknown_bound 2013make_unique(size_t __n) 2014{ 2015 typedef typename remove_extent<_Tp>::type _Up; 2016 return unique_ptr<_Tp>(new _Up[__n]()); 2017} 2018 2019template<class _Tp, class... _Args> 2020 typename __unique_if<_Tp>::__unique_array_known_bound 2021 make_unique(_Args&&...) = delete; 2022 2023#endif // _LIBCPP_STD_VER > 11 2024 2025template <class _Tp, class _Dp> 2026#ifdef _LIBCPP_CXX03_LANG 2027struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 2028#else 2029struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 2030 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 2031#endif 2032{ 2033 typedef unique_ptr<_Tp, _Dp> argument_type; 2034 typedef size_t result_type; 2035 _LIBCPP_INLINE_VISIBILITY 2036 result_type operator()(const argument_type& __ptr) const 2037 { 2038 typedef typename argument_type::pointer pointer; 2039 return hash<pointer>()(__ptr.get()); 2040 } 2041}; 2042 2043struct __destruct_n 2044{ 2045private: 2046 size_t __size_; 2047 2048 template <class _Tp> 2049 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 2050 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 2051 2052 template <class _Tp> 2053 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 2054 {} 2055 2056 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 2057 {++__size_;} 2058 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 2059 {} 2060 2061 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 2062 {__size_ = __s;} 2063 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 2064 {} 2065public: 2066 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 2067 : __size_(__s) {} 2068 2069 template <class _Tp> 2070 _LIBCPP_INLINE_VISIBILITY void __incr() _NOEXCEPT 2071 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2072 2073 template <class _Tp> 2074 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 2075 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2076 2077 template <class _Tp> 2078 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 2079 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2080}; 2081 2082template <class _Alloc> 2083class __allocator_destructor 2084{ 2085 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 2086public: 2087 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 2088 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 2089private: 2090 _Alloc& __alloc_; 2091 size_type __s_; 2092public: 2093 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 2094 _NOEXCEPT 2095 : __alloc_(__a), __s_(__s) {} 2096 _LIBCPP_INLINE_VISIBILITY 2097 void operator()(pointer __p) _NOEXCEPT 2098 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 2099}; 2100 2101template <class _InputIterator, class _ForwardIterator> 2102_ForwardIterator 2103uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 2104{ 2105 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2106#ifndef _LIBCPP_NO_EXCEPTIONS 2107 _ForwardIterator __s = __r; 2108 try 2109 { 2110#endif 2111 for (; __f != __l; ++__f, (void) ++__r) 2112 ::new ((void*)_VSTD::addressof(*__r)) value_type(*__f); 2113#ifndef _LIBCPP_NO_EXCEPTIONS 2114 } 2115 catch (...) 2116 { 2117 for (; __s != __r; ++__s) 2118 __s->~value_type(); 2119 throw; 2120 } 2121#endif 2122 return __r; 2123} 2124 2125template <class _InputIterator, class _Size, class _ForwardIterator> 2126_ForwardIterator 2127uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 2128{ 2129 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2130#ifndef _LIBCPP_NO_EXCEPTIONS 2131 _ForwardIterator __s = __r; 2132 try 2133 { 2134#endif 2135 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 2136 ::new ((void*)_VSTD::addressof(*__r)) value_type(*__f); 2137#ifndef _LIBCPP_NO_EXCEPTIONS 2138 } 2139 catch (...) 2140 { 2141 for (; __s != __r; ++__s) 2142 __s->~value_type(); 2143 throw; 2144 } 2145#endif 2146 return __r; 2147} 2148 2149template <class _ForwardIterator, class _Tp> 2150void 2151uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 2152{ 2153 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2154#ifndef _LIBCPP_NO_EXCEPTIONS 2155 _ForwardIterator __s = __f; 2156 try 2157 { 2158#endif 2159 for (; __f != __l; ++__f) 2160 ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); 2161#ifndef _LIBCPP_NO_EXCEPTIONS 2162 } 2163 catch (...) 2164 { 2165 for (; __s != __f; ++__s) 2166 __s->~value_type(); 2167 throw; 2168 } 2169#endif 2170} 2171 2172template <class _ForwardIterator, class _Size, class _Tp> 2173_ForwardIterator 2174uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 2175{ 2176 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2177#ifndef _LIBCPP_NO_EXCEPTIONS 2178 _ForwardIterator __s = __f; 2179 try 2180 { 2181#endif 2182 for (; __n > 0; ++__f, (void) --__n) 2183 ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); 2184#ifndef _LIBCPP_NO_EXCEPTIONS 2185 } 2186 catch (...) 2187 { 2188 for (; __s != __f; ++__s) 2189 __s->~value_type(); 2190 throw; 2191 } 2192#endif 2193 return __f; 2194} 2195 2196#if _LIBCPP_STD_VER > 14 2197 2198template <class _ForwardIterator> 2199inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 2200void destroy(_ForwardIterator __first, _ForwardIterator __last) { 2201 for (; __first != __last; ++__first) 2202 _VSTD::destroy_at(_VSTD::addressof(*__first)); 2203} 2204 2205template <class _ForwardIterator, class _Size> 2206inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 2207_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 2208 for (; __n > 0; (void)++__first, --__n) 2209 _VSTD::destroy_at(_VSTD::addressof(*__first)); 2210 return __first; 2211} 2212 2213template <class _ForwardIterator> 2214inline _LIBCPP_INLINE_VISIBILITY 2215void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 2216 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2217 auto __idx = __first; 2218#ifndef _LIBCPP_NO_EXCEPTIONS 2219 try { 2220#endif 2221 for (; __idx != __last; ++__idx) 2222 ::new ((void*)_VSTD::addressof(*__idx)) _Vt; 2223#ifndef _LIBCPP_NO_EXCEPTIONS 2224 } catch (...) { 2225 _VSTD::destroy(__first, __idx); 2226 throw; 2227 } 2228#endif 2229} 2230 2231template <class _ForwardIterator, class _Size> 2232inline _LIBCPP_INLINE_VISIBILITY 2233_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 2234 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2235 auto __idx = __first; 2236#ifndef _LIBCPP_NO_EXCEPTIONS 2237 try { 2238#endif 2239 for (; __n > 0; (void)++__idx, --__n) 2240 ::new ((void*)_VSTD::addressof(*__idx)) _Vt; 2241 return __idx; 2242#ifndef _LIBCPP_NO_EXCEPTIONS 2243 } catch (...) { 2244 _VSTD::destroy(__first, __idx); 2245 throw; 2246 } 2247#endif 2248} 2249 2250 2251template <class _ForwardIterator> 2252inline _LIBCPP_INLINE_VISIBILITY 2253void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 2254 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2255 auto __idx = __first; 2256#ifndef _LIBCPP_NO_EXCEPTIONS 2257 try { 2258#endif 2259 for (; __idx != __last; ++__idx) 2260 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); 2261#ifndef _LIBCPP_NO_EXCEPTIONS 2262 } catch (...) { 2263 _VSTD::destroy(__first, __idx); 2264 throw; 2265 } 2266#endif 2267} 2268 2269template <class _ForwardIterator, class _Size> 2270inline _LIBCPP_INLINE_VISIBILITY 2271_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 2272 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 2273 auto __idx = __first; 2274#ifndef _LIBCPP_NO_EXCEPTIONS 2275 try { 2276#endif 2277 for (; __n > 0; (void)++__idx, --__n) 2278 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); 2279 return __idx; 2280#ifndef _LIBCPP_NO_EXCEPTIONS 2281 } catch (...) { 2282 _VSTD::destroy(__first, __idx); 2283 throw; 2284 } 2285#endif 2286} 2287 2288 2289template <class _InputIt, class _ForwardIt> 2290inline _LIBCPP_INLINE_VISIBILITY 2291_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 2292 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 2293 auto __idx = __first_res; 2294#ifndef _LIBCPP_NO_EXCEPTIONS 2295 try { 2296#endif 2297 for (; __first != __last; (void)++__idx, ++__first) 2298 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(_VSTD::move(*__first)); 2299 return __idx; 2300#ifndef _LIBCPP_NO_EXCEPTIONS 2301 } catch (...) { 2302 _VSTD::destroy(__first_res, __idx); 2303 throw; 2304 } 2305#endif 2306} 2307 2308template <class _InputIt, class _Size, class _ForwardIt> 2309inline _LIBCPP_INLINE_VISIBILITY 2310pair<_InputIt, _ForwardIt> 2311uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 2312 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 2313 auto __idx = __first_res; 2314#ifndef _LIBCPP_NO_EXCEPTIONS 2315 try { 2316#endif 2317 for (; __n > 0; ++__idx, (void)++__first, --__n) 2318 ::new ((void*)_VSTD::addressof(*__idx)) _Vt(_VSTD::move(*__first)); 2319 return {__first, __idx}; 2320#ifndef _LIBCPP_NO_EXCEPTIONS 2321 } catch (...) { 2322 _VSTD::destroy(__first_res, __idx); 2323 throw; 2324 } 2325#endif 2326} 2327 2328 2329#endif // _LIBCPP_STD_VER > 14 2330 2331// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 2332// should be sufficient for thread safety. 2333// See https://llvm.org/PR22803 2334#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 2335 && defined(__ATOMIC_RELAXED) \ 2336 && defined(__ATOMIC_ACQ_REL) 2337# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 2338#elif defined(_LIBCPP_COMPILER_GCC) 2339# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 2340#endif 2341 2342template <class _Tp> 2343inline _LIBCPP_INLINE_VISIBILITY _Tp 2344__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 2345{ 2346#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 2347 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 2348#else 2349 return __t += 1; 2350#endif 2351} 2352 2353template <class _Tp> 2354inline _LIBCPP_INLINE_VISIBILITY _Tp 2355__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 2356{ 2357#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 2358 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 2359#else 2360 return __t -= 1; 2361#endif 2362} 2363 2364class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 2365 : public std::exception 2366{ 2367public: 2368 bad_weak_ptr() _NOEXCEPT = default; 2369 bad_weak_ptr(const bad_weak_ptr&) _NOEXCEPT = default; 2370 virtual ~bad_weak_ptr() _NOEXCEPT; 2371 virtual const char* what() const _NOEXCEPT; 2372}; 2373 2374_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 2375void __throw_bad_weak_ptr() 2376{ 2377#ifndef _LIBCPP_NO_EXCEPTIONS 2378 throw bad_weak_ptr(); 2379#else 2380 _VSTD::abort(); 2381#endif 2382} 2383 2384template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 2385 2386class _LIBCPP_TYPE_VIS __shared_count 2387{ 2388 __shared_count(const __shared_count&); 2389 __shared_count& operator=(const __shared_count&); 2390 2391protected: 2392 long __shared_owners_; 2393 virtual ~__shared_count(); 2394private: 2395 virtual void __on_zero_shared() _NOEXCEPT = 0; 2396 2397public: 2398 _LIBCPP_INLINE_VISIBILITY 2399 explicit __shared_count(long __refs = 0) _NOEXCEPT 2400 : __shared_owners_(__refs) {} 2401 2402#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 2403 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 2404 void __add_shared() _NOEXCEPT; 2405 bool __release_shared() _NOEXCEPT; 2406#else 2407 _LIBCPP_INLINE_VISIBILITY 2408 void __add_shared() _NOEXCEPT { 2409 __libcpp_atomic_refcount_increment(__shared_owners_); 2410 } 2411 _LIBCPP_INLINE_VISIBILITY 2412 bool __release_shared() _NOEXCEPT { 2413 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 2414 __on_zero_shared(); 2415 return true; 2416 } 2417 return false; 2418 } 2419#endif 2420 _LIBCPP_INLINE_VISIBILITY 2421 long use_count() const _NOEXCEPT { 2422 return __libcpp_relaxed_load(&__shared_owners_) + 1; 2423 } 2424}; 2425 2426class _LIBCPP_TYPE_VIS __shared_weak_count 2427 : private __shared_count 2428{ 2429 long __shared_weak_owners_; 2430 2431public: 2432 _LIBCPP_INLINE_VISIBILITY 2433 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 2434 : __shared_count(__refs), 2435 __shared_weak_owners_(__refs) {} 2436protected: 2437 virtual ~__shared_weak_count(); 2438 2439public: 2440#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 2441 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 2442 void __add_shared() _NOEXCEPT; 2443 void __add_weak() _NOEXCEPT; 2444 void __release_shared() _NOEXCEPT; 2445#else 2446 _LIBCPP_INLINE_VISIBILITY 2447 void __add_shared() _NOEXCEPT { 2448 __shared_count::__add_shared(); 2449 } 2450 _LIBCPP_INLINE_VISIBILITY 2451 void __add_weak() _NOEXCEPT { 2452 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 2453 } 2454 _LIBCPP_INLINE_VISIBILITY 2455 void __release_shared() _NOEXCEPT { 2456 if (__shared_count::__release_shared()) 2457 __release_weak(); 2458 } 2459#endif 2460 void __release_weak() _NOEXCEPT; 2461 _LIBCPP_INLINE_VISIBILITY 2462 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 2463 __shared_weak_count* lock() _NOEXCEPT; 2464 2465 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 2466private: 2467 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 2468}; 2469 2470template <class _Tp, class _Dp, class _Alloc> 2471class __shared_ptr_pointer 2472 : public __shared_weak_count 2473{ 2474 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 2475public: 2476 _LIBCPP_INLINE_VISIBILITY 2477 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 2478 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 2479 2480#ifndef _LIBCPP_NO_RTTI 2481 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 2482#endif 2483 2484private: 2485 virtual void __on_zero_shared() _NOEXCEPT; 2486 virtual void __on_zero_shared_weak() _NOEXCEPT; 2487}; 2488 2489#ifndef _LIBCPP_NO_RTTI 2490 2491template <class _Tp, class _Dp, class _Alloc> 2492const void* 2493__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 2494{ 2495 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 2496} 2497 2498#endif // _LIBCPP_NO_RTTI 2499 2500template <class _Tp, class _Dp, class _Alloc> 2501void 2502__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 2503{ 2504 __data_.first().second()(__data_.first().first()); 2505 __data_.first().second().~_Dp(); 2506} 2507 2508template <class _Tp, class _Dp, class _Alloc> 2509void 2510__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 2511{ 2512 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 2513 typedef allocator_traits<_Al> _ATraits; 2514 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 2515 2516 _Al __a(__data_.second()); 2517 __data_.second().~_Alloc(); 2518 __a.deallocate(_PTraits::pointer_to(*this), 1); 2519} 2520 2521template <class _Tp, class _Alloc> 2522struct __shared_ptr_emplace 2523 : __shared_weak_count 2524{ 2525 template<class ..._Args> 2526 _LIBCPP_HIDE_FROM_ABI 2527 explicit __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 2528 : __storage_(_VSTD::move(__a)) 2529 { 2530#if _LIBCPP_STD_VER > 17 2531 using _TpAlloc = typename __allocator_traits_rebind<_Alloc, _Tp>::type; 2532 _TpAlloc __tmp(*__get_alloc()); 2533 allocator_traits<_TpAlloc>::construct(__tmp, __get_elem(), _VSTD::forward<_Args>(__args)...); 2534#else 2535 ::new ((void*)__get_elem()) _Tp(_VSTD::forward<_Args>(__args)...); 2536#endif 2537 } 2538 2539 _LIBCPP_HIDE_FROM_ABI 2540 _Alloc* __get_alloc() _NOEXCEPT { return __storage_.__get_alloc(); } 2541 2542 _LIBCPP_HIDE_FROM_ABI 2543 _Tp* __get_elem() _NOEXCEPT { return __storage_.__get_elem(); } 2544 2545private: 2546 virtual void __on_zero_shared() _NOEXCEPT { 2547#if _LIBCPP_STD_VER > 17 2548 using _TpAlloc = typename __allocator_traits_rebind<_Alloc, _Tp>::type; 2549 _TpAlloc __tmp(*__get_alloc()); 2550 allocator_traits<_TpAlloc>::destroy(__tmp, __get_elem()); 2551#else 2552 __get_elem()->~_Tp(); 2553#endif 2554 } 2555 2556 virtual void __on_zero_shared_weak() _NOEXCEPT { 2557 using _ControlBlockAlloc = typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type; 2558 using _ControlBlockPointer = typename allocator_traits<_ControlBlockAlloc>::pointer; 2559 _ControlBlockAlloc __tmp(*__get_alloc()); 2560 __storage_.~_Storage(); 2561 allocator_traits<_ControlBlockAlloc>::deallocate(__tmp, 2562 pointer_traits<_ControlBlockPointer>::pointer_to(*this), 1); 2563 } 2564 2565 // This class implements the control block for non-array shared pointers created 2566 // through `std::allocate_shared` and `std::make_shared`. 2567 // 2568 // In previous versions of the library, we used a compressed pair to store 2569 // both the _Alloc and the _Tp. This implies using EBO, which is incompatible 2570 // with Allocator construction for _Tp. To allow implementing P0674 in C++20, 2571 // we now use a properly aligned char buffer while making sure that we maintain 2572 // the same layout that we had when we used a compressed pair. 2573 using _CompressedPair = __compressed_pair<_Alloc, _Tp>; 2574 struct _ALIGNAS_TYPE(_CompressedPair) _Storage { 2575 char __blob_[sizeof(_CompressedPair)]; 2576 2577 _LIBCPP_HIDE_FROM_ABI explicit _Storage(_Alloc&& __a) { 2578 ::new ((void*)__get_alloc()) _Alloc(_VSTD::move(__a)); 2579 } 2580 _LIBCPP_HIDE_FROM_ABI ~_Storage() { 2581 __get_alloc()->~_Alloc(); 2582 } 2583 _Alloc* __get_alloc() _NOEXCEPT { 2584 _CompressedPair *__as_pair = reinterpret_cast<_CompressedPair*>(__blob_); 2585 typename _CompressedPair::_Base1* __first = _CompressedPair::__get_first_base(__as_pair); 2586 _Alloc *__alloc = reinterpret_cast<_Alloc*>(__first); 2587 return __alloc; 2588 } 2589 _LIBCPP_NO_CFI _Tp* __get_elem() _NOEXCEPT { 2590 _CompressedPair *__as_pair = reinterpret_cast<_CompressedPair*>(__blob_); 2591 typename _CompressedPair::_Base2* __second = _CompressedPair::__get_second_base(__as_pair); 2592 _Tp *__elem = reinterpret_cast<_Tp*>(__second); 2593 return __elem; 2594 } 2595 }; 2596 2597 static_assert(_LIBCPP_ALIGNOF(_Storage) == _LIBCPP_ALIGNOF(_CompressedPair), ""); 2598 static_assert(sizeof(_Storage) == sizeof(_CompressedPair), ""); 2599 _Storage __storage_; 2600}; 2601 2602struct __shared_ptr_dummy_rebind_allocator_type; 2603template <> 2604class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 2605{ 2606public: 2607 template <class _Other> 2608 struct rebind 2609 { 2610 typedef allocator<_Other> other; 2611 }; 2612}; 2613 2614template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 2615 2616template<class _Tp, class _Up> 2617struct __compatible_with 2618#if _LIBCPP_STD_VER > 14 2619 : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {}; 2620#else 2621 : is_convertible<_Tp*, _Up*> {}; 2622#endif // _LIBCPP_STD_VER > 14 2623 2624template <class _Dp, class _Pt, 2625 class = decltype(_VSTD::declval<_Dp>()(_VSTD::declval<_Pt>()))> 2626static true_type __well_formed_deleter_test(int); 2627 2628template <class, class> 2629static false_type __well_formed_deleter_test(...); 2630 2631template <class _Dp, class _Pt> 2632struct __well_formed_deleter : decltype(__well_formed_deleter_test<_Dp, _Pt>(0)) {}; 2633 2634template<class _Dp, class _Tp, class _Yp> 2635struct __shared_ptr_deleter_ctor_reqs 2636{ 2637 static const bool value = __compatible_with<_Tp, _Yp>::value && 2638 is_move_constructible<_Dp>::value && 2639 __well_formed_deleter<_Dp, _Tp*>::value; 2640}; 2641 2642#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI) 2643# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 2644#else 2645# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI 2646#endif 2647 2648template<class _Tp> 2649class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr 2650{ 2651public: 2652#if _LIBCPP_STD_VER > 14 2653 typedef weak_ptr<_Tp> weak_type; 2654 typedef remove_extent_t<_Tp> element_type; 2655#else 2656 typedef _Tp element_type; 2657#endif 2658 2659private: 2660 element_type* __ptr_; 2661 __shared_weak_count* __cntrl_; 2662 2663 struct __nat {int __for_bool_;}; 2664public: 2665 _LIBCPP_INLINE_VISIBILITY 2666 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 2667 _LIBCPP_INLINE_VISIBILITY 2668 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 2669 template<class _Yp> 2670 explicit shared_ptr(_Yp* __p, 2671 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 2672 template<class _Yp, class _Dp> 2673 shared_ptr(_Yp* __p, _Dp __d, 2674 typename enable_if<__shared_ptr_deleter_ctor_reqs<_Dp, _Yp, element_type>::value, __nat>::type = __nat()); 2675 template<class _Yp, class _Dp, class _Alloc> 2676 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 2677 typename enable_if<__shared_ptr_deleter_ctor_reqs<_Dp, _Yp, element_type>::value, __nat>::type = __nat()); 2678 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 2679 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 2680 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 2681 _LIBCPP_INLINE_VISIBILITY 2682 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 2683 template<class _Yp> 2684 _LIBCPP_INLINE_VISIBILITY 2685 shared_ptr(const shared_ptr<_Yp>& __r, 2686 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 2687 _NOEXCEPT; 2688 _LIBCPP_INLINE_VISIBILITY 2689 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 2690 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 2691 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 2692 _NOEXCEPT; 2693 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 2694 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 2695#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2696 template<class _Yp> 2697 shared_ptr(auto_ptr<_Yp>&& __r, 2698 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 2699#endif 2700 template <class _Yp, class _Dp> 2701 shared_ptr(unique_ptr<_Yp, _Dp>&&, 2702 typename enable_if 2703 < 2704 !is_lvalue_reference<_Dp>::value && 2705 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2706 __nat 2707 >::type = __nat()); 2708 template <class _Yp, class _Dp> 2709 shared_ptr(unique_ptr<_Yp, _Dp>&&, 2710 typename enable_if 2711 < 2712 is_lvalue_reference<_Dp>::value && 2713 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2714 __nat 2715 >::type = __nat()); 2716 2717 ~shared_ptr(); 2718 2719 _LIBCPP_INLINE_VISIBILITY 2720 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 2721 template<class _Yp> 2722 typename enable_if 2723 < 2724 __compatible_with<_Yp, element_type>::value, 2725 shared_ptr& 2726 >::type 2727 _LIBCPP_INLINE_VISIBILITY 2728 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 2729 _LIBCPP_INLINE_VISIBILITY 2730 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 2731 template<class _Yp> 2732 typename enable_if 2733 < 2734 __compatible_with<_Yp, element_type>::value, 2735 shared_ptr& 2736 >::type 2737 _LIBCPP_INLINE_VISIBILITY 2738 operator=(shared_ptr<_Yp>&& __r); 2739#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2740 template<class _Yp> 2741 _LIBCPP_INLINE_VISIBILITY 2742 typename enable_if 2743 < 2744 !is_array<_Yp>::value && 2745 is_convertible<_Yp*, element_type*>::value, 2746 shared_ptr 2747 >::type& 2748 operator=(auto_ptr<_Yp>&& __r); 2749#endif 2750 template <class _Yp, class _Dp> 2751 typename enable_if 2752 < 2753 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 2754 shared_ptr& 2755 >::type 2756 _LIBCPP_INLINE_VISIBILITY 2757 operator=(unique_ptr<_Yp, _Dp>&& __r); 2758 2759 _LIBCPP_INLINE_VISIBILITY 2760 void swap(shared_ptr& __r) _NOEXCEPT; 2761 _LIBCPP_INLINE_VISIBILITY 2762 void reset() _NOEXCEPT; 2763 template<class _Yp> 2764 typename enable_if 2765 < 2766 __compatible_with<_Yp, element_type>::value, 2767 void 2768 >::type 2769 _LIBCPP_INLINE_VISIBILITY 2770 reset(_Yp* __p); 2771 template<class _Yp, class _Dp> 2772 typename enable_if 2773 < 2774 __compatible_with<_Yp, element_type>::value, 2775 void 2776 >::type 2777 _LIBCPP_INLINE_VISIBILITY 2778 reset(_Yp* __p, _Dp __d); 2779 template<class _Yp, class _Dp, class _Alloc> 2780 typename enable_if 2781 < 2782 __compatible_with<_Yp, element_type>::value, 2783 void 2784 >::type 2785 _LIBCPP_INLINE_VISIBILITY 2786 reset(_Yp* __p, _Dp __d, _Alloc __a); 2787 2788 _LIBCPP_INLINE_VISIBILITY 2789 element_type* get() const _NOEXCEPT {return __ptr_;} 2790 _LIBCPP_INLINE_VISIBILITY 2791 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 2792 {return *__ptr_;} 2793 _LIBCPP_INLINE_VISIBILITY 2794 element_type* operator->() const _NOEXCEPT 2795 { 2796 static_assert(!_VSTD::is_array<_Tp>::value, 2797 "std::shared_ptr<T>::operator-> is only valid when T is not an array type."); 2798 return __ptr_; 2799 } 2800 _LIBCPP_INLINE_VISIBILITY 2801 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 2802 _LIBCPP_INLINE_VISIBILITY 2803 bool unique() const _NOEXCEPT {return use_count() == 1;} 2804 _LIBCPP_INLINE_VISIBILITY 2805 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != nullptr;} 2806 template <class _Up> 2807 _LIBCPP_INLINE_VISIBILITY 2808 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 2809 {return __cntrl_ < __p.__cntrl_;} 2810 template <class _Up> 2811 _LIBCPP_INLINE_VISIBILITY 2812 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 2813 {return __cntrl_ < __p.__cntrl_;} 2814 _LIBCPP_INLINE_VISIBILITY 2815 bool 2816 __owner_equivalent(const shared_ptr& __p) const 2817 {return __cntrl_ == __p.__cntrl_;} 2818 2819#if _LIBCPP_STD_VER > 14 2820 typename add_lvalue_reference<element_type>::type 2821 _LIBCPP_INLINE_VISIBILITY 2822 operator[](ptrdiff_t __i) const 2823 { 2824 static_assert(_VSTD::is_array<_Tp>::value, 2825 "std::shared_ptr<T>::operator[] is only valid when T is an array type."); 2826 return __ptr_[__i]; 2827 } 2828#endif 2829 2830#ifndef _LIBCPP_NO_RTTI 2831 template <class _Dp> 2832 _LIBCPP_INLINE_VISIBILITY 2833 _Dp* __get_deleter() const _NOEXCEPT 2834 {return static_cast<_Dp*>(__cntrl_ 2835 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 2836 : nullptr);} 2837#endif // _LIBCPP_NO_RTTI 2838 2839 template<class _Yp, class _CntrlBlk> 2840 static shared_ptr<_Tp> 2841 __create_with_control_block(_Yp* __p, _CntrlBlk* __cntrl) _NOEXCEPT 2842 { 2843 shared_ptr<_Tp> __r; 2844 __r.__ptr_ = __p; 2845 __r.__cntrl_ = __cntrl; 2846 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 2847 return __r; 2848 } 2849 2850private: 2851 template <class _Yp, bool = is_function<_Yp>::value> 2852 struct __shared_ptr_default_allocator 2853 { 2854 typedef allocator<_Yp> type; 2855 }; 2856 2857 template <class _Yp> 2858 struct __shared_ptr_default_allocator<_Yp, true> 2859 { 2860 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 2861 }; 2862 2863 template <class _Yp, class _OrigPtr> 2864 _LIBCPP_INLINE_VISIBILITY 2865 typename enable_if<is_convertible<_OrigPtr*, 2866 const enable_shared_from_this<_Yp>* 2867 >::value, 2868 void>::type 2869 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 2870 _OrigPtr* __ptr) _NOEXCEPT 2871 { 2872 typedef typename remove_cv<_Yp>::type _RawYp; 2873 if (__e && __e->__weak_this_.expired()) 2874 { 2875 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 2876 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 2877 } 2878 } 2879 2880 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 2881 2882 template <class, class _Yp> 2883 struct __shared_ptr_default_delete 2884 : default_delete<_Yp> {}; 2885 2886 template <class _Yp, class _Un, size_t _Sz> 2887 struct __shared_ptr_default_delete<_Yp[_Sz], _Un> 2888 : default_delete<_Yp[]> {}; 2889 2890 template <class _Yp, class _Un> 2891 struct __shared_ptr_default_delete<_Yp[], _Un> 2892 : default_delete<_Yp[]> {}; 2893 2894 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 2895 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 2896}; 2897 2898#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 2899template<class _Tp> 2900shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>; 2901template<class _Tp, class _Dp> 2902shared_ptr(unique_ptr<_Tp, _Dp>) -> shared_ptr<_Tp>; 2903#endif 2904 2905template<class _Tp> 2906inline 2907_LIBCPP_CONSTEXPR 2908shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 2909 : __ptr_(nullptr), 2910 __cntrl_(nullptr) 2911{ 2912} 2913 2914template<class _Tp> 2915inline 2916_LIBCPP_CONSTEXPR 2917shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 2918 : __ptr_(nullptr), 2919 __cntrl_(nullptr) 2920{ 2921} 2922 2923template<class _Tp> 2924template<class _Yp> 2925shared_ptr<_Tp>::shared_ptr(_Yp* __p, 2926 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 2927 : __ptr_(__p) 2928{ 2929 unique_ptr<_Yp> __hold(__p); 2930 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 2931 typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk; 2932 __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT()); 2933 __hold.release(); 2934 __enable_weak_this(__p, __p); 2935} 2936 2937template<class _Tp> 2938template<class _Yp, class _Dp> 2939shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 2940 typename enable_if<__shared_ptr_deleter_ctor_reqs<_Dp, _Yp, element_type>::value, __nat>::type) 2941 : __ptr_(__p) 2942{ 2943#ifndef _LIBCPP_NO_EXCEPTIONS 2944 try 2945 { 2946#endif // _LIBCPP_NO_EXCEPTIONS 2947 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 2948 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 2949#ifndef _LIBCPP_CXX03_LANG 2950 __cntrl_ = new _CntrlBlk(__p, _VSTD::move(__d), _AllocT()); 2951#else 2952 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 2953#endif // not _LIBCPP_CXX03_LANG 2954 __enable_weak_this(__p, __p); 2955#ifndef _LIBCPP_NO_EXCEPTIONS 2956 } 2957 catch (...) 2958 { 2959 __d(__p); 2960 throw; 2961 } 2962#endif // _LIBCPP_NO_EXCEPTIONS 2963} 2964 2965template<class _Tp> 2966template<class _Dp> 2967shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 2968 : __ptr_(nullptr) 2969{ 2970#ifndef _LIBCPP_NO_EXCEPTIONS 2971 try 2972 { 2973#endif // _LIBCPP_NO_EXCEPTIONS 2974 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 2975 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 2976#ifndef _LIBCPP_CXX03_LANG 2977 __cntrl_ = new _CntrlBlk(__p, _VSTD::move(__d), _AllocT()); 2978#else 2979 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 2980#endif // not _LIBCPP_CXX03_LANG 2981#ifndef _LIBCPP_NO_EXCEPTIONS 2982 } 2983 catch (...) 2984 { 2985 __d(__p); 2986 throw; 2987 } 2988#endif // _LIBCPP_NO_EXCEPTIONS 2989} 2990 2991template<class _Tp> 2992template<class _Yp, class _Dp, class _Alloc> 2993shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 2994 typename enable_if<__shared_ptr_deleter_ctor_reqs<_Dp, _Yp, element_type>::value, __nat>::type) 2995 : __ptr_(__p) 2996{ 2997#ifndef _LIBCPP_NO_EXCEPTIONS 2998 try 2999 { 3000#endif // _LIBCPP_NO_EXCEPTIONS 3001 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 3002 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3003 typedef __allocator_destructor<_A2> _D2; 3004 _A2 __a2(__a); 3005 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3006 ::new ((void*)_VSTD::addressof(*__hold2.get())) 3007#ifndef _LIBCPP_CXX03_LANG 3008 _CntrlBlk(__p, _VSTD::move(__d), __a); 3009#else 3010 _CntrlBlk(__p, __d, __a); 3011#endif // not _LIBCPP_CXX03_LANG 3012 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3013 __enable_weak_this(__p, __p); 3014#ifndef _LIBCPP_NO_EXCEPTIONS 3015 } 3016 catch (...) 3017 { 3018 __d(__p); 3019 throw; 3020 } 3021#endif // _LIBCPP_NO_EXCEPTIONS 3022} 3023 3024template<class _Tp> 3025template<class _Dp, class _Alloc> 3026shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 3027 : __ptr_(nullptr) 3028{ 3029#ifndef _LIBCPP_NO_EXCEPTIONS 3030 try 3031 { 3032#endif // _LIBCPP_NO_EXCEPTIONS 3033 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 3034 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3035 typedef __allocator_destructor<_A2> _D2; 3036 _A2 __a2(__a); 3037 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3038 ::new ((void*)_VSTD::addressof(*__hold2.get())) 3039#ifndef _LIBCPP_CXX03_LANG 3040 _CntrlBlk(__p, _VSTD::move(__d), __a); 3041#else 3042 _CntrlBlk(__p, __d, __a); 3043#endif // not _LIBCPP_CXX03_LANG 3044 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3045#ifndef _LIBCPP_NO_EXCEPTIONS 3046 } 3047 catch (...) 3048 { 3049 __d(__p); 3050 throw; 3051 } 3052#endif // _LIBCPP_NO_EXCEPTIONS 3053} 3054 3055template<class _Tp> 3056template<class _Yp> 3057inline 3058shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 3059 : __ptr_(__p), 3060 __cntrl_(__r.__cntrl_) 3061{ 3062 if (__cntrl_) 3063 __cntrl_->__add_shared(); 3064} 3065 3066template<class _Tp> 3067inline 3068shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 3069 : __ptr_(__r.__ptr_), 3070 __cntrl_(__r.__cntrl_) 3071{ 3072 if (__cntrl_) 3073 __cntrl_->__add_shared(); 3074} 3075 3076template<class _Tp> 3077template<class _Yp> 3078inline 3079shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 3080 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3081 _NOEXCEPT 3082 : __ptr_(__r.__ptr_), 3083 __cntrl_(__r.__cntrl_) 3084{ 3085 if (__cntrl_) 3086 __cntrl_->__add_shared(); 3087} 3088 3089template<class _Tp> 3090inline 3091shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 3092 : __ptr_(__r.__ptr_), 3093 __cntrl_(__r.__cntrl_) 3094{ 3095 __r.__ptr_ = nullptr; 3096 __r.__cntrl_ = nullptr; 3097} 3098 3099template<class _Tp> 3100template<class _Yp> 3101inline 3102shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 3103 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3104 _NOEXCEPT 3105 : __ptr_(__r.__ptr_), 3106 __cntrl_(__r.__cntrl_) 3107{ 3108 __r.__ptr_ = nullptr; 3109 __r.__cntrl_ = nullptr; 3110} 3111 3112#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3113template<class _Tp> 3114template<class _Yp> 3115shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 3116 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3117 : __ptr_(__r.get()) 3118{ 3119 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 3120 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 3121 __enable_weak_this(__r.get(), __r.get()); 3122 __r.release(); 3123} 3124#endif 3125 3126template<class _Tp> 3127template <class _Yp, class _Dp> 3128shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3129 typename enable_if 3130 < 3131 !is_lvalue_reference<_Dp>::value && 3132 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3133 __nat 3134 >::type) 3135 : __ptr_(__r.get()) 3136{ 3137#if _LIBCPP_STD_VER > 11 3138 if (__ptr_ == nullptr) 3139 __cntrl_ = nullptr; 3140 else 3141#endif 3142 { 3143 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3144 typedef __shared_ptr_pointer<typename unique_ptr<_Yp, _Dp>::pointer, _Dp, _AllocT > _CntrlBlk; 3145 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 3146 __enable_weak_this(__r.get(), __r.get()); 3147 } 3148 __r.release(); 3149} 3150 3151template<class _Tp> 3152template <class _Yp, class _Dp> 3153shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3154 typename enable_if 3155 < 3156 is_lvalue_reference<_Dp>::value && 3157 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3158 __nat 3159 >::type) 3160 : __ptr_(__r.get()) 3161{ 3162#if _LIBCPP_STD_VER > 11 3163 if (__ptr_ == nullptr) 3164 __cntrl_ = nullptr; 3165 else 3166#endif 3167 { 3168 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3169 typedef __shared_ptr_pointer<typename unique_ptr<_Yp, _Dp>::pointer, 3170 reference_wrapper<typename remove_reference<_Dp>::type>, 3171 _AllocT > _CntrlBlk; 3172 __cntrl_ = new _CntrlBlk(__r.get(), _VSTD::ref(__r.get_deleter()), _AllocT()); 3173 __enable_weak_this(__r.get(), __r.get()); 3174 } 3175 __r.release(); 3176} 3177 3178template<class _Tp> 3179shared_ptr<_Tp>::~shared_ptr() 3180{ 3181 if (__cntrl_) 3182 __cntrl_->__release_shared(); 3183} 3184 3185template<class _Tp> 3186inline 3187shared_ptr<_Tp>& 3188shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 3189{ 3190 shared_ptr(__r).swap(*this); 3191 return *this; 3192} 3193 3194template<class _Tp> 3195template<class _Yp> 3196inline 3197typename enable_if 3198< 3199 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3200 shared_ptr<_Tp>& 3201>::type 3202shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 3203{ 3204 shared_ptr(__r).swap(*this); 3205 return *this; 3206} 3207 3208template<class _Tp> 3209inline 3210shared_ptr<_Tp>& 3211shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 3212{ 3213 shared_ptr(_VSTD::move(__r)).swap(*this); 3214 return *this; 3215} 3216 3217template<class _Tp> 3218template<class _Yp> 3219inline 3220typename enable_if 3221< 3222 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3223 shared_ptr<_Tp>& 3224>::type 3225shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 3226{ 3227 shared_ptr(_VSTD::move(__r)).swap(*this); 3228 return *this; 3229} 3230 3231#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3232template<class _Tp> 3233template<class _Yp> 3234inline 3235typename enable_if 3236< 3237 !is_array<_Yp>::value && 3238 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 3239 shared_ptr<_Tp> 3240>::type& 3241shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 3242{ 3243 shared_ptr(_VSTD::move(__r)).swap(*this); 3244 return *this; 3245} 3246#endif 3247 3248template<class _Tp> 3249template <class _Yp, class _Dp> 3250inline 3251typename enable_if 3252< 3253 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 3254 typename shared_ptr<_Tp>::element_type*>::value, 3255 shared_ptr<_Tp>& 3256>::type 3257shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 3258{ 3259 shared_ptr(_VSTD::move(__r)).swap(*this); 3260 return *this; 3261} 3262 3263template<class _Tp> 3264inline 3265void 3266shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 3267{ 3268 _VSTD::swap(__ptr_, __r.__ptr_); 3269 _VSTD::swap(__cntrl_, __r.__cntrl_); 3270} 3271 3272template<class _Tp> 3273inline 3274void 3275shared_ptr<_Tp>::reset() _NOEXCEPT 3276{ 3277 shared_ptr().swap(*this); 3278} 3279 3280template<class _Tp> 3281template<class _Yp> 3282inline 3283typename enable_if 3284< 3285 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3286 void 3287>::type 3288shared_ptr<_Tp>::reset(_Yp* __p) 3289{ 3290 shared_ptr(__p).swap(*this); 3291} 3292 3293template<class _Tp> 3294template<class _Yp, class _Dp> 3295inline 3296typename enable_if 3297< 3298 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3299 void 3300>::type 3301shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 3302{ 3303 shared_ptr(__p, __d).swap(*this); 3304} 3305 3306template<class _Tp> 3307template<class _Yp, class _Dp, class _Alloc> 3308inline 3309typename enable_if 3310< 3311 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3312 void 3313>::type 3314shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 3315{ 3316 shared_ptr(__p, __d, __a).swap(*this); 3317} 3318 3319// 3320// std::allocate_shared and std::make_shared 3321// 3322template<class _Tp, class _Alloc, class ..._Args, class = _EnableIf<!is_array<_Tp>::value> > 3323_LIBCPP_HIDE_FROM_ABI 3324shared_ptr<_Tp> allocate_shared(const _Alloc& __a, _Args&& ...__args) 3325{ 3326 using _ControlBlock = __shared_ptr_emplace<_Tp, _Alloc>; 3327 using _ControlBlockAllocator = typename __allocator_traits_rebind<_Alloc, _ControlBlock>::type; 3328 __allocation_guard<_ControlBlockAllocator> __guard(__a, 1); 3329 ::new ((void*)_VSTD::addressof(*__guard.__get())) _ControlBlock(__a, _VSTD::forward<_Args>(__args)...); 3330 auto __control_block = __guard.__release_ptr(); 3331 return shared_ptr<_Tp>::__create_with_control_block((*__control_block).__get_elem(), _VSTD::addressof(*__control_block)); 3332} 3333 3334template<class _Tp, class ..._Args, class = _EnableIf<!is_array<_Tp>::value> > 3335_LIBCPP_HIDE_FROM_ABI 3336shared_ptr<_Tp> make_shared(_Args&& ...__args) 3337{ 3338 return _VSTD::allocate_shared<_Tp>(allocator<_Tp>(), _VSTD::forward<_Args>(__args)...); 3339} 3340 3341template<class _Tp, class _Up> 3342inline _LIBCPP_INLINE_VISIBILITY 3343bool 3344operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3345{ 3346 return __x.get() == __y.get(); 3347} 3348 3349template<class _Tp, class _Up> 3350inline _LIBCPP_INLINE_VISIBILITY 3351bool 3352operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3353{ 3354 return !(__x == __y); 3355} 3356 3357template<class _Tp, class _Up> 3358inline _LIBCPP_INLINE_VISIBILITY 3359bool 3360operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3361{ 3362#if _LIBCPP_STD_VER <= 11 3363 typedef typename common_type<_Tp*, _Up*>::type _Vp; 3364 return less<_Vp>()(__x.get(), __y.get()); 3365#else 3366 return less<>()(__x.get(), __y.get()); 3367#endif 3368 3369} 3370 3371template<class _Tp, class _Up> 3372inline _LIBCPP_INLINE_VISIBILITY 3373bool 3374operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3375{ 3376 return __y < __x; 3377} 3378 3379template<class _Tp, class _Up> 3380inline _LIBCPP_INLINE_VISIBILITY 3381bool 3382operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3383{ 3384 return !(__y < __x); 3385} 3386 3387template<class _Tp, class _Up> 3388inline _LIBCPP_INLINE_VISIBILITY 3389bool 3390operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 3391{ 3392 return !(__x < __y); 3393} 3394 3395template<class _Tp> 3396inline _LIBCPP_INLINE_VISIBILITY 3397bool 3398operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3399{ 3400 return !__x; 3401} 3402 3403template<class _Tp> 3404inline _LIBCPP_INLINE_VISIBILITY 3405bool 3406operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3407{ 3408 return !__x; 3409} 3410 3411template<class _Tp> 3412inline _LIBCPP_INLINE_VISIBILITY 3413bool 3414operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3415{ 3416 return static_cast<bool>(__x); 3417} 3418 3419template<class _Tp> 3420inline _LIBCPP_INLINE_VISIBILITY 3421bool 3422operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3423{ 3424 return static_cast<bool>(__x); 3425} 3426 3427template<class _Tp> 3428inline _LIBCPP_INLINE_VISIBILITY 3429bool 3430operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3431{ 3432 return less<_Tp*>()(__x.get(), nullptr); 3433} 3434 3435template<class _Tp> 3436inline _LIBCPP_INLINE_VISIBILITY 3437bool 3438operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3439{ 3440 return less<_Tp*>()(nullptr, __x.get()); 3441} 3442 3443template<class _Tp> 3444inline _LIBCPP_INLINE_VISIBILITY 3445bool 3446operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3447{ 3448 return nullptr < __x; 3449} 3450 3451template<class _Tp> 3452inline _LIBCPP_INLINE_VISIBILITY 3453bool 3454operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3455{ 3456 return __x < nullptr; 3457} 3458 3459template<class _Tp> 3460inline _LIBCPP_INLINE_VISIBILITY 3461bool 3462operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3463{ 3464 return !(nullptr < __x); 3465} 3466 3467template<class _Tp> 3468inline _LIBCPP_INLINE_VISIBILITY 3469bool 3470operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3471{ 3472 return !(__x < nullptr); 3473} 3474 3475template<class _Tp> 3476inline _LIBCPP_INLINE_VISIBILITY 3477bool 3478operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 3479{ 3480 return !(__x < nullptr); 3481} 3482 3483template<class _Tp> 3484inline _LIBCPP_INLINE_VISIBILITY 3485bool 3486operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 3487{ 3488 return !(nullptr < __x); 3489} 3490 3491template<class _Tp> 3492inline _LIBCPP_INLINE_VISIBILITY 3493void 3494swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 3495{ 3496 __x.swap(__y); 3497} 3498 3499template<class _Tp, class _Up> 3500inline _LIBCPP_INLINE_VISIBILITY 3501shared_ptr<_Tp> 3502static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3503{ 3504 return shared_ptr<_Tp>(__r, 3505 static_cast< 3506 typename shared_ptr<_Tp>::element_type*>(__r.get())); 3507} 3508 3509template<class _Tp, class _Up> 3510inline _LIBCPP_INLINE_VISIBILITY 3511shared_ptr<_Tp> 3512dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3513{ 3514 typedef typename shared_ptr<_Tp>::element_type _ET; 3515 _ET* __p = dynamic_cast<_ET*>(__r.get()); 3516 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 3517} 3518 3519template<class _Tp, class _Up> 3520shared_ptr<_Tp> 3521const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3522{ 3523 typedef typename shared_ptr<_Tp>::element_type _RTp; 3524 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 3525} 3526 3527template<class _Tp, class _Up> 3528shared_ptr<_Tp> 3529reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 3530{ 3531 return shared_ptr<_Tp>(__r, 3532 reinterpret_cast< 3533 typename shared_ptr<_Tp>::element_type*>(__r.get())); 3534} 3535 3536#ifndef _LIBCPP_NO_RTTI 3537 3538template<class _Dp, class _Tp> 3539inline _LIBCPP_INLINE_VISIBILITY 3540_Dp* 3541get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 3542{ 3543 return __p.template __get_deleter<_Dp>(); 3544} 3545 3546#endif // _LIBCPP_NO_RTTI 3547 3548template<class _Tp> 3549class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS weak_ptr 3550{ 3551public: 3552 typedef _Tp element_type; 3553private: 3554 element_type* __ptr_; 3555 __shared_weak_count* __cntrl_; 3556 3557public: 3558 _LIBCPP_INLINE_VISIBILITY 3559 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 3560 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 3561 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3562 _NOEXCEPT; 3563 _LIBCPP_INLINE_VISIBILITY 3564 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 3565 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 3566 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3567 _NOEXCEPT; 3568 3569 _LIBCPP_INLINE_VISIBILITY 3570 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 3571 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 3572 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 3573 _NOEXCEPT; 3574 ~weak_ptr(); 3575 3576 _LIBCPP_INLINE_VISIBILITY 3577 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 3578 template<class _Yp> 3579 typename enable_if 3580 < 3581 is_convertible<_Yp*, element_type*>::value, 3582 weak_ptr& 3583 >::type 3584 _LIBCPP_INLINE_VISIBILITY 3585 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 3586 3587 _LIBCPP_INLINE_VISIBILITY 3588 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 3589 template<class _Yp> 3590 typename enable_if 3591 < 3592 is_convertible<_Yp*, element_type*>::value, 3593 weak_ptr& 3594 >::type 3595 _LIBCPP_INLINE_VISIBILITY 3596 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 3597 3598 template<class _Yp> 3599 typename enable_if 3600 < 3601 is_convertible<_Yp*, element_type*>::value, 3602 weak_ptr& 3603 >::type 3604 _LIBCPP_INLINE_VISIBILITY 3605 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 3606 3607 _LIBCPP_INLINE_VISIBILITY 3608 void swap(weak_ptr& __r) _NOEXCEPT; 3609 _LIBCPP_INLINE_VISIBILITY 3610 void reset() _NOEXCEPT; 3611 3612 _LIBCPP_INLINE_VISIBILITY 3613 long use_count() const _NOEXCEPT 3614 {return __cntrl_ ? __cntrl_->use_count() : 0;} 3615 _LIBCPP_INLINE_VISIBILITY 3616 bool expired() const _NOEXCEPT 3617 {return __cntrl_ == nullptr || __cntrl_->use_count() == 0;} 3618 shared_ptr<_Tp> lock() const _NOEXCEPT; 3619 template<class _Up> 3620 _LIBCPP_INLINE_VISIBILITY 3621 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 3622 {return __cntrl_ < __r.__cntrl_;} 3623 template<class _Up> 3624 _LIBCPP_INLINE_VISIBILITY 3625 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 3626 {return __cntrl_ < __r.__cntrl_;} 3627 3628 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3629 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3630}; 3631 3632#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 3633template<class _Tp> 3634weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>; 3635#endif 3636 3637template<class _Tp> 3638inline 3639_LIBCPP_CONSTEXPR 3640weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 3641 : __ptr_(nullptr), 3642 __cntrl_(nullptr) 3643{ 3644} 3645 3646template<class _Tp> 3647inline 3648weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 3649 : __ptr_(__r.__ptr_), 3650 __cntrl_(__r.__cntrl_) 3651{ 3652 if (__cntrl_) 3653 __cntrl_->__add_weak(); 3654} 3655 3656template<class _Tp> 3657template<class _Yp> 3658inline 3659weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 3660 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3661 _NOEXCEPT 3662 : __ptr_(__r.__ptr_), 3663 __cntrl_(__r.__cntrl_) 3664{ 3665 if (__cntrl_) 3666 __cntrl_->__add_weak(); 3667} 3668 3669template<class _Tp> 3670template<class _Yp> 3671inline 3672weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 3673 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3674 _NOEXCEPT 3675 : __ptr_(__r.__ptr_), 3676 __cntrl_(__r.__cntrl_) 3677{ 3678 if (__cntrl_) 3679 __cntrl_->__add_weak(); 3680} 3681 3682template<class _Tp> 3683inline 3684weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 3685 : __ptr_(__r.__ptr_), 3686 __cntrl_(__r.__cntrl_) 3687{ 3688 __r.__ptr_ = nullptr; 3689 __r.__cntrl_ = nullptr; 3690} 3691 3692template<class _Tp> 3693template<class _Yp> 3694inline 3695weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 3696 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 3697 _NOEXCEPT 3698 : __ptr_(__r.__ptr_), 3699 __cntrl_(__r.__cntrl_) 3700{ 3701 __r.__ptr_ = nullptr; 3702 __r.__cntrl_ = nullptr; 3703} 3704 3705template<class _Tp> 3706weak_ptr<_Tp>::~weak_ptr() 3707{ 3708 if (__cntrl_) 3709 __cntrl_->__release_weak(); 3710} 3711 3712template<class _Tp> 3713inline 3714weak_ptr<_Tp>& 3715weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 3716{ 3717 weak_ptr(__r).swap(*this); 3718 return *this; 3719} 3720 3721template<class _Tp> 3722template<class _Yp> 3723inline 3724typename enable_if 3725< 3726 is_convertible<_Yp*, _Tp*>::value, 3727 weak_ptr<_Tp>& 3728>::type 3729weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 3730{ 3731 weak_ptr(__r).swap(*this); 3732 return *this; 3733} 3734 3735template<class _Tp> 3736inline 3737weak_ptr<_Tp>& 3738weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 3739{ 3740 weak_ptr(_VSTD::move(__r)).swap(*this); 3741 return *this; 3742} 3743 3744template<class _Tp> 3745template<class _Yp> 3746inline 3747typename enable_if 3748< 3749 is_convertible<_Yp*, _Tp*>::value, 3750 weak_ptr<_Tp>& 3751>::type 3752weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 3753{ 3754 weak_ptr(_VSTD::move(__r)).swap(*this); 3755 return *this; 3756} 3757 3758template<class _Tp> 3759template<class _Yp> 3760inline 3761typename enable_if 3762< 3763 is_convertible<_Yp*, _Tp*>::value, 3764 weak_ptr<_Tp>& 3765>::type 3766weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 3767{ 3768 weak_ptr(__r).swap(*this); 3769 return *this; 3770} 3771 3772template<class _Tp> 3773inline 3774void 3775weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 3776{ 3777 _VSTD::swap(__ptr_, __r.__ptr_); 3778 _VSTD::swap(__cntrl_, __r.__cntrl_); 3779} 3780 3781template<class _Tp> 3782inline _LIBCPP_INLINE_VISIBILITY 3783void 3784swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 3785{ 3786 __x.swap(__y); 3787} 3788 3789template<class _Tp> 3790inline 3791void 3792weak_ptr<_Tp>::reset() _NOEXCEPT 3793{ 3794 weak_ptr().swap(*this); 3795} 3796 3797template<class _Tp> 3798template<class _Yp> 3799shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 3800 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3801 : __ptr_(__r.__ptr_), 3802 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 3803{ 3804 if (__cntrl_ == nullptr) 3805 __throw_bad_weak_ptr(); 3806} 3807 3808template<class _Tp> 3809shared_ptr<_Tp> 3810weak_ptr<_Tp>::lock() const _NOEXCEPT 3811{ 3812 shared_ptr<_Tp> __r; 3813 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 3814 if (__r.__cntrl_) 3815 __r.__ptr_ = __ptr_; 3816 return __r; 3817} 3818 3819#if _LIBCPP_STD_VER > 14 3820template <class _Tp = void> struct owner_less; 3821#else 3822template <class _Tp> struct owner_less; 3823#endif 3824 3825template <class _Tp> 3826struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 3827 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 3828{ 3829 typedef bool result_type; 3830 _LIBCPP_INLINE_VISIBILITY 3831 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3832 {return __x.owner_before(__y);} 3833 _LIBCPP_INLINE_VISIBILITY 3834 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3835 {return __x.owner_before(__y);} 3836 _LIBCPP_INLINE_VISIBILITY 3837 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3838 {return __x.owner_before(__y);} 3839}; 3840 3841template <class _Tp> 3842struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 3843 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 3844{ 3845 typedef bool result_type; 3846 _LIBCPP_INLINE_VISIBILITY 3847 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3848 {return __x.owner_before(__y);} 3849 _LIBCPP_INLINE_VISIBILITY 3850 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 3851 {return __x.owner_before(__y);} 3852 _LIBCPP_INLINE_VISIBILITY 3853 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 3854 {return __x.owner_before(__y);} 3855}; 3856 3857#if _LIBCPP_STD_VER > 14 3858template <> 3859struct _LIBCPP_TEMPLATE_VIS owner_less<void> 3860{ 3861 template <class _Tp, class _Up> 3862 _LIBCPP_INLINE_VISIBILITY 3863 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 3864 {return __x.owner_before(__y);} 3865 template <class _Tp, class _Up> 3866 _LIBCPP_INLINE_VISIBILITY 3867 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 3868 {return __x.owner_before(__y);} 3869 template <class _Tp, class _Up> 3870 _LIBCPP_INLINE_VISIBILITY 3871 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 3872 {return __x.owner_before(__y);} 3873 template <class _Tp, class _Up> 3874 _LIBCPP_INLINE_VISIBILITY 3875 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 3876 {return __x.owner_before(__y);} 3877 typedef void is_transparent; 3878}; 3879#endif 3880 3881template<class _Tp> 3882class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 3883{ 3884 mutable weak_ptr<_Tp> __weak_this_; 3885protected: 3886 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 3887 enable_shared_from_this() _NOEXCEPT {} 3888 _LIBCPP_INLINE_VISIBILITY 3889 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 3890 _LIBCPP_INLINE_VISIBILITY 3891 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 3892 {return *this;} 3893 _LIBCPP_INLINE_VISIBILITY 3894 ~enable_shared_from_this() {} 3895public: 3896 _LIBCPP_INLINE_VISIBILITY 3897 shared_ptr<_Tp> shared_from_this() 3898 {return shared_ptr<_Tp>(__weak_this_);} 3899 _LIBCPP_INLINE_VISIBILITY 3900 shared_ptr<_Tp const> shared_from_this() const 3901 {return shared_ptr<const _Tp>(__weak_this_);} 3902 3903#if _LIBCPP_STD_VER > 14 3904 _LIBCPP_INLINE_VISIBILITY 3905 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 3906 { return __weak_this_; } 3907 3908 _LIBCPP_INLINE_VISIBILITY 3909 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 3910 { return __weak_this_; } 3911#endif // _LIBCPP_STD_VER > 14 3912 3913 template <class _Up> friend class shared_ptr; 3914}; 3915 3916template <class _Tp> 3917struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 3918{ 3919 typedef shared_ptr<_Tp> argument_type; 3920 typedef size_t result_type; 3921 3922 _LIBCPP_INLINE_VISIBILITY 3923 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 3924 { 3925 return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get()); 3926 } 3927}; 3928 3929template<class _CharT, class _Traits, class _Yp> 3930inline _LIBCPP_INLINE_VISIBILITY 3931basic_ostream<_CharT, _Traits>& 3932operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 3933 3934 3935#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 3936 3937class _LIBCPP_TYPE_VIS __sp_mut 3938{ 3939 void* __lx; 3940public: 3941 void lock() _NOEXCEPT; 3942 void unlock() _NOEXCEPT; 3943 3944private: 3945 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 3946 __sp_mut(const __sp_mut&); 3947 __sp_mut& operator=(const __sp_mut&); 3948 3949 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 3950}; 3951 3952_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3953__sp_mut& __get_sp_mut(const void*); 3954 3955template <class _Tp> 3956inline _LIBCPP_INLINE_VISIBILITY 3957bool 3958atomic_is_lock_free(const shared_ptr<_Tp>*) 3959{ 3960 return false; 3961} 3962 3963template <class _Tp> 3964_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3965shared_ptr<_Tp> 3966atomic_load(const shared_ptr<_Tp>* __p) 3967{ 3968 __sp_mut& __m = __get_sp_mut(__p); 3969 __m.lock(); 3970 shared_ptr<_Tp> __q = *__p; 3971 __m.unlock(); 3972 return __q; 3973} 3974 3975template <class _Tp> 3976inline _LIBCPP_INLINE_VISIBILITY 3977_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3978shared_ptr<_Tp> 3979atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 3980{ 3981 return atomic_load(__p); 3982} 3983 3984template <class _Tp> 3985_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3986void 3987atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 3988{ 3989 __sp_mut& __m = __get_sp_mut(__p); 3990 __m.lock(); 3991 __p->swap(__r); 3992 __m.unlock(); 3993} 3994 3995template <class _Tp> 3996inline _LIBCPP_INLINE_VISIBILITY 3997_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 3998void 3999atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4000{ 4001 atomic_store(__p, __r); 4002} 4003 4004template <class _Tp> 4005_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4006shared_ptr<_Tp> 4007atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 4008{ 4009 __sp_mut& __m = __get_sp_mut(__p); 4010 __m.lock(); 4011 __p->swap(__r); 4012 __m.unlock(); 4013 return __r; 4014} 4015 4016template <class _Tp> 4017inline _LIBCPP_INLINE_VISIBILITY 4018_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4019shared_ptr<_Tp> 4020atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4021{ 4022 return atomic_exchange(__p, __r); 4023} 4024 4025template <class _Tp> 4026_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4027bool 4028atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4029{ 4030 shared_ptr<_Tp> __temp; 4031 __sp_mut& __m = __get_sp_mut(__p); 4032 __m.lock(); 4033 if (__p->__owner_equivalent(*__v)) 4034 { 4035 _VSTD::swap(__temp, *__p); 4036 *__p = __w; 4037 __m.unlock(); 4038 return true; 4039 } 4040 _VSTD::swap(__temp, *__v); 4041 *__v = *__p; 4042 __m.unlock(); 4043 return false; 4044} 4045 4046template <class _Tp> 4047inline _LIBCPP_INLINE_VISIBILITY 4048_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4049bool 4050atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4051{ 4052 return atomic_compare_exchange_strong(__p, __v, __w); 4053} 4054 4055template <class _Tp> 4056inline _LIBCPP_INLINE_VISIBILITY 4057_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4058bool 4059atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4060 shared_ptr<_Tp> __w, memory_order, memory_order) 4061{ 4062 return atomic_compare_exchange_strong(__p, __v, __w); 4063} 4064 4065template <class _Tp> 4066inline _LIBCPP_INLINE_VISIBILITY 4067_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4068bool 4069atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4070 shared_ptr<_Tp> __w, memory_order, memory_order) 4071{ 4072 return atomic_compare_exchange_weak(__p, __v, __w); 4073} 4074 4075#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 4076 4077//enum class 4078#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 4079# ifndef _LIBCPP_CXX03_LANG 4080enum class pointer_safety : unsigned char { 4081 relaxed, 4082 preferred, 4083 strict 4084}; 4085# endif 4086#else 4087struct _LIBCPP_TYPE_VIS pointer_safety 4088{ 4089 enum __lx 4090 { 4091 relaxed, 4092 preferred, 4093 strict 4094 }; 4095 4096 __lx __v_; 4097 4098 _LIBCPP_INLINE_VISIBILITY 4099 pointer_safety() : __v_() {} 4100 4101 _LIBCPP_INLINE_VISIBILITY 4102 pointer_safety(__lx __v) : __v_(__v) {} 4103 _LIBCPP_INLINE_VISIBILITY 4104 operator int() const {return __v_;} 4105}; 4106#endif 4107 4108#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 4109 defined(_LIBCPP_BUILDING_LIBRARY) 4110_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 4111#else 4112// This function is only offered in C++03 under ABI v1. 4113# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 4114inline _LIBCPP_INLINE_VISIBILITY 4115pointer_safety get_pointer_safety() _NOEXCEPT { 4116 return pointer_safety::relaxed; 4117} 4118# endif 4119#endif 4120 4121 4122_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 4123_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 4124_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 4125_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 4126 4127template <class _Tp> 4128inline _LIBCPP_INLINE_VISIBILITY 4129_Tp* 4130undeclare_reachable(_Tp* __p) 4131{ 4132 return static_cast<_Tp*>(__undeclare_reachable(__p)); 4133} 4134 4135_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 4136 4137// --- Helper for container swap -- 4138template <typename _Alloc> 4139_LIBCPP_INLINE_VISIBILITY 4140void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 4141#if _LIBCPP_STD_VER >= 14 4142 _NOEXCEPT 4143#else 4144 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4145#endif 4146{ 4147 using _VSTD::swap; 4148 swap(__a1, __a2); 4149} 4150 4151template <typename _Alloc> 4152inline _LIBCPP_INLINE_VISIBILITY 4153void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 4154 4155template <typename _Alloc> 4156inline _LIBCPP_INLINE_VISIBILITY 4157void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 4158#if _LIBCPP_STD_VER >= 14 4159 _NOEXCEPT 4160#else 4161 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4162#endif 4163{ 4164 _VSTD::__swap_allocator(__a1, __a2, 4165 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 4166} 4167 4168template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 4169struct __noexcept_move_assign_container : public integral_constant<bool, 4170 _Traits::propagate_on_container_move_assignment::value 4171#if _LIBCPP_STD_VER > 14 4172 || _Traits::is_always_equal::value 4173#else 4174 && is_nothrow_move_assignable<_Alloc>::value 4175#endif 4176 > {}; 4177 4178 4179template <class _Tp, class _Alloc> 4180struct __temp_value { 4181 typedef allocator_traits<_Alloc> _Traits; 4182 4183 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 4184 _Alloc &__a; 4185 4186 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 4187 _Tp & get() { return *__addr(); } 4188 4189 template<class... _Args> 4190 _LIBCPP_NO_CFI 4191 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 4192 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 4193 _VSTD::forward<_Args>(__args)...); 4194 } 4195 4196 ~__temp_value() { _Traits::destroy(__a, __addr()); } 4197 }; 4198 4199template<typename _Alloc, typename = void, typename = void> 4200struct __is_allocator : false_type {}; 4201 4202template<typename _Alloc> 4203struct __is_allocator<_Alloc, 4204 typename __void_t<typename _Alloc::value_type>::type, 4205 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 4206 > 4207 : true_type {}; 4208 4209// __builtin_new_allocator -- A non-templated helper for allocating and 4210// deallocating memory using __builtin_operator_new and 4211// __builtin_operator_delete. It should be used in preference to 4212// `std::allocator<T>` to avoid additional instantiations. 4213struct __builtin_new_allocator { 4214 struct __builtin_new_deleter { 4215 typedef void* pointer_type; 4216 4217 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 4218 : __size_(__size), __align_(__align) {} 4219 4220 void operator()(void* p) const _NOEXCEPT { 4221 _VSTD::__libcpp_deallocate(p, __size_, __align_); 4222 } 4223 4224 private: 4225 size_t __size_; 4226 size_t __align_; 4227 }; 4228 4229 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 4230 4231 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 4232 return __holder_t(_VSTD::__libcpp_allocate(__s, __align), 4233 __builtin_new_deleter(__s, __align)); 4234 } 4235 4236 static void __deallocate_bytes(void* __p, size_t __s, 4237 size_t __align) _NOEXCEPT { 4238 _VSTD::__libcpp_deallocate(__p, __s, __align); 4239 } 4240 4241 template <class _Tp> 4242 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 4243 static __holder_t __allocate_type(size_t __n) { 4244 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 4245 } 4246 4247 template <class _Tp> 4248 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 4249 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 4250 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 4251 } 4252}; 4253 4254 4255_LIBCPP_END_NAMESPACE_STD 4256 4257_LIBCPP_POP_MACROS 4258 4259#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 4260# include <__pstl_memory> 4261#endif 4262 4263#endif // _LIBCPP_MEMORY 4264