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