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