1// -*- C++ -*- 2//===-------------------------- memory ------------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is dual licensed under the MIT and the University of Illinois Open 7// Source Licenses. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_MEMORY 12#define _LIBCPP_MEMORY 13 14/* 15 memory synopsis 16 17namespace std 18{ 19 20struct allocator_arg_t { }; 21constexpr allocator_arg_t allocator_arg = allocator_arg_t(); 22 23template <class T, class Alloc> struct uses_allocator; 24 25template <class Ptr> 26struct pointer_traits 27{ 28 typedef Ptr pointer; 29 typedef <details> element_type; 30 typedef <details> difference_type; 31 32 template <class U> using rebind = <details>; 33 34 static pointer pointer_to(<details>); 35}; 36 37template <class T> 38struct pointer_traits<T*> 39{ 40 typedef T* pointer; 41 typedef T element_type; 42 typedef ptrdiff_t difference_type; 43 44 template <class U> using rebind = U*; 45 46 static pointer pointer_to(<details>) noexcept; 47}; 48 49template <class Alloc> 50struct allocator_traits 51{ 52 typedef Alloc allocator_type; 53 typedef typename allocator_type::value_type 54 value_type; 55 56 typedef Alloc::pointer | value_type* pointer; 57 typedef Alloc::const_pointer 58 | pointer_traits<pointer>::rebind<const value_type> 59 const_pointer; 60 typedef Alloc::void_pointer 61 | pointer_traits<pointer>::rebind<void> 62 void_pointer; 63 typedef Alloc::const_void_pointer 64 | pointer_traits<pointer>::rebind<const void> 65 const_void_pointer; 66 typedef Alloc::difference_type 67 | pointer_traits<pointer>::difference_type 68 difference_type; 69 typedef Alloc::size_type 70 | make_unsigned<difference_type>::type 71 size_type; 72 typedef Alloc::propagate_on_container_copy_assignment 73 | false_type propagate_on_container_copy_assignment; 74 typedef Alloc::propagate_on_container_move_assignment 75 | false_type propagate_on_container_move_assignment; 76 typedef Alloc::propagate_on_container_swap 77 | false_type propagate_on_container_swap; 78 typedef Alloc::is_always_equal 79 | is_empty is_always_equal; 80 81 template <class T> using rebind_alloc = Alloc::rebind<U>::other | Alloc<T, Args...>; 82 template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>; 83 84 static pointer allocate(allocator_type& a, size_type n); 85 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); 86 87 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; 88 89 template <class T, class... Args> 90 static void construct(allocator_type& a, T* p, Args&&... args); 91 92 template <class T> 93 static void destroy(allocator_type& a, T* p); 94 95 static size_type max_size(const allocator_type& a); // noexcept in C++14 96 97 static allocator_type 98 select_on_container_copy_construction(const allocator_type& a); 99}; 100 101template <> 102class allocator<void> 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; 119 typedef const T* const_pointer; 120 typedef typename add_lvalue_reference<T>::type reference; 121 typedef typename add_lvalue_reference<const T>::type const_reference; 122 typedef T value_type; 123 124 template <class U> struct rebind {typedef allocator<U> other;}; 125 126 allocator() noexcept; 127 allocator(const allocator&) noexcept; 128 template <class U> allocator(const allocator<U>&) noexcept; 129 ~allocator(); 130 pointer address(reference x) const noexcept; 131 const_pointer address(const_reference x) const noexcept; 132 pointer allocate(size_type, allocator<void>::const_pointer hint = 0); 133 void deallocate(pointer p, size_type n) noexcept; 134 size_type max_size() const noexcept; 135 template<class U, class... Args> 136 void construct(U* p, Args&&... args); 137 template <class U> 138 void destroy(U* p); 139}; 140 141template <class T, class U> 142bool operator==(const allocator<T>&, const allocator<U>&) noexcept; 143 144template <class T, class U> 145bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; 146 147template <class OutputIterator, class T> 148class raw_storage_iterator 149 : public iterator<output_iterator_tag, 150 T, // purposefully not C++03 151 ptrdiff_t, // purposefully not C++03 152 T*, // purposefully not C++03 153 raw_storage_iterator&> // purposefully not C++03 154{ 155public: 156 explicit raw_storage_iterator(OutputIterator x); 157 raw_storage_iterator& operator*(); 158 raw_storage_iterator& operator=(const T& element); 159 raw_storage_iterator& operator++(); 160 raw_storage_iterator operator++(int); 161}; 162 163template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 164template <class T> void return_temporary_buffer(T* p) noexcept; 165 166template <class T> T* addressof(T& r) noexcept; 167template <class T> T* addressof(const T&& r) noexcept = delete; 168 169template <class InputIterator, class ForwardIterator> 170ForwardIterator 171uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 172 173template <class InputIterator, class Size, class ForwardIterator> 174ForwardIterator 175uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 176 177template <class ForwardIterator, class T> 178void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 179 180template <class ForwardIterator, class Size, class T> 181ForwardIterator 182uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 183 184template <class T> 185void destroy_at(T* location); 186 187template <class ForwardIterator> 188 void destroy(ForwardIterator first, ForwardIterator last); 189 190template <class ForwardIterator, class Size> 191 ForwardIterator destroy_n(ForwardIterator first, Size n); 192 193template <class InputIterator, class ForwardIterator> 194 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 195 196template <class InputIterator, class Size, class ForwardIterator> 197 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 198 199template <class ForwardIterator> 200 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 201 202template <class ForwardIterator, class Size> 203 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 204 205template <class ForwardIterator> 206 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 207 208template <class ForwardIterator, class Size> 209 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 210 211template <class Y> struct auto_ptr_ref {}; // removed in C++17 212 213template<class X> 214class auto_ptr // removed in C++17 215{ 216public: 217 typedef X element_type; 218 219 explicit auto_ptr(X* p =0) throw(); 220 auto_ptr(auto_ptr&) throw(); 221 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 222 auto_ptr& operator=(auto_ptr&) throw(); 223 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 224 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 225 ~auto_ptr() throw(); 226 227 typename add_lvalue_reference<X>::type operator*() const throw(); 228 X* operator->() const throw(); 229 X* get() const throw(); 230 X* release() throw(); 231 void reset(X* p =0) throw(); 232 233 auto_ptr(auto_ptr_ref<X>) throw(); 234 template<class Y> operator auto_ptr_ref<Y>() throw(); 235 template<class Y> operator auto_ptr<Y>() throw(); 236}; 237 238template <class T> 239struct default_delete 240{ 241 constexpr default_delete() noexcept = default; 242 template <class U> default_delete(const default_delete<U>&) noexcept; 243 244 void operator()(T*) const noexcept; 245}; 246 247template <class T> 248struct default_delete<T[]> 249{ 250 constexpr default_delete() noexcept = default; 251 void operator()(T*) const noexcept; 252 template <class U> void operator()(U*) const = delete; 253}; 254 255template <class T, class D = default_delete<T>> 256class unique_ptr 257{ 258public: 259 typedef see below pointer; 260 typedef T element_type; 261 typedef D deleter_type; 262 263 // constructors 264 constexpr unique_ptr() noexcept; 265 explicit unique_ptr(pointer p) noexcept; 266 unique_ptr(pointer p, see below d1) noexcept; 267 unique_ptr(pointer p, see below d2) noexcept; 268 unique_ptr(unique_ptr&& u) noexcept; 269 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 270 template <class U, class E> 271 unique_ptr(unique_ptr<U, E>&& u) noexcept; 272 template <class U> 273 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 274 275 // destructor 276 ~unique_ptr(); 277 278 // assignment 279 unique_ptr& operator=(unique_ptr&& u) noexcept; 280 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 281 unique_ptr& operator=(nullptr_t) noexcept; 282 283 // observers 284 typename add_lvalue_reference<T>::type operator*() const; 285 pointer operator->() const noexcept; 286 pointer get() const noexcept; 287 deleter_type& get_deleter() noexcept; 288 const deleter_type& get_deleter() const noexcept; 289 explicit operator bool() const noexcept; 290 291 // modifiers 292 pointer release() noexcept; 293 void reset(pointer p = pointer()) noexcept; 294 void swap(unique_ptr& u) noexcept; 295}; 296 297template <class T, class D> 298class unique_ptr<T[], D> 299{ 300public: 301 typedef implementation-defined pointer; 302 typedef T element_type; 303 typedef D deleter_type; 304 305 // constructors 306 constexpr unique_ptr() noexcept; 307 explicit unique_ptr(pointer p) noexcept; 308 unique_ptr(pointer p, see below d) noexcept; 309 unique_ptr(pointer p, see below d) noexcept; 310 unique_ptr(unique_ptr&& u) noexcept; 311 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 312 313 // destructor 314 ~unique_ptr(); 315 316 // assignment 317 unique_ptr& operator=(unique_ptr&& u) noexcept; 318 unique_ptr& operator=(nullptr_t) noexcept; 319 320 // observers 321 T& operator[](size_t i) const; 322 pointer get() const noexcept; 323 deleter_type& get_deleter() noexcept; 324 const deleter_type& get_deleter() const noexcept; 325 explicit operator bool() const noexcept; 326 327 // modifiers 328 pointer release() noexcept; 329 void reset(pointer p = pointer()) noexcept; 330 void reset(nullptr_t) noexcept; 331 template <class U> void reset(U) = delete; 332 void swap(unique_ptr& u) noexcept; 333}; 334 335template <class T, class D> 336 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 337 338template <class T1, class D1, class T2, class D2> 339 bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 340template <class T1, class D1, class T2, class D2> 341 bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 342template <class T1, class D1, class T2, class D2> 343 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 344template <class T1, class D1, class T2, class D2> 345 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 346template <class T1, class D1, class T2, class D2> 347 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 348template <class T1, class D1, class T2, class D2> 349 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 350 351template <class T, class D> 352 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 353template <class T, class D> 354 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 355template <class T, class D> 356 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 357template <class T, class D> 358 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 359 360template <class T, class D> 361 bool operator<(const unique_ptr<T, D>& x, nullptr_t); 362template <class T, class D> 363 bool operator<(nullptr_t, const unique_ptr<T, D>& y); 364template <class T, class D> 365 bool operator<=(const unique_ptr<T, D>& x, nullptr_t); 366template <class T, class D> 367 bool operator<=(nullptr_t, const unique_ptr<T, D>& y); 368template <class T, class D> 369 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 370template <class T, class D> 371 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 372template <class T, class D> 373 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 374template <class T, class D> 375 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 376 377class bad_weak_ptr 378 : public std::exception 379{ 380 bad_weak_ptr() noexcept; 381}; 382 383template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 384template<class T> unique_ptr<T> make_unique(size_t n); // C++14 385template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 386 387template<class T> 388class shared_ptr 389{ 390public: 391 typedef T element_type; 392 typedef weak_ptr<T> weak_type; // C++17 393 394 // constructors: 395 constexpr shared_ptr() noexcept; 396 template<class Y> explicit shared_ptr(Y* p); 397 template<class Y, class D> shared_ptr(Y* p, D d); 398 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 399 template <class D> shared_ptr(nullptr_t p, D d); 400 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 401 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 402 shared_ptr(const shared_ptr& r) noexcept; 403 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 404 shared_ptr(shared_ptr&& r) noexcept; 405 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 406 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 407 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 408 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 409 shared_ptr(nullptr_t) : shared_ptr() { } 410 411 // destructor: 412 ~shared_ptr(); 413 414 // assignment: 415 shared_ptr& operator=(const shared_ptr& r) noexcept; 416 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 417 shared_ptr& operator=(shared_ptr&& r) noexcept; 418 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 419 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 420 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 421 422 // modifiers: 423 void swap(shared_ptr& r) noexcept; 424 void reset() noexcept; 425 template<class Y> void reset(Y* p); 426 template<class Y, class D> void reset(Y* p, D d); 427 template<class Y, class D, class A> void reset(Y* p, D d, A a); 428 429 // observers: 430 T* get() const noexcept; 431 T& operator*() const noexcept; 432 T* operator->() const noexcept; 433 long use_count() const noexcept; 434 bool unique() const noexcept; 435 explicit operator bool() const noexcept; 436 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 437 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 438}; 439 440// shared_ptr comparisons: 441template<class T, class U> 442 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 443template<class T, class U> 444 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 445template<class T, class U> 446 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 447template<class T, class U> 448 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 449template<class T, class U> 450 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 451template<class T, class U> 452 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 453 454template <class T> 455 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; 456template <class T> 457 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; 458template <class T> 459 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; 460template <class T> 461 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; 462template <class T> 463 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; 464template <class T> 465bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 466template <class T> 467 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 468template <class T> 469 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 470template <class T> 471 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 472template <class T> 473 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 474template <class T> 475 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 476template <class T> 477 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 478 479// shared_ptr specialized algorithms: 480template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 481 482// shared_ptr casts: 483template<class T, class U> 484 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 485template<class T, class U> 486 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 487template<class T, class U> 488 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 489 490// shared_ptr I/O: 491template<class E, class T, class Y> 492 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 493 494// shared_ptr get_deleter: 495template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 496 497template<class T, class... Args> 498 shared_ptr<T> make_shared(Args&&... args); 499template<class T, class A, class... Args> 500 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 501 502template<class T> 503class weak_ptr 504{ 505public: 506 typedef T element_type; 507 508 // constructors 509 constexpr weak_ptr() noexcept; 510 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 511 weak_ptr(weak_ptr const& r) noexcept; 512 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 513 weak_ptr(weak_ptr&& r) noexcept; // C++14 514 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 515 516 // destructor 517 ~weak_ptr(); 518 519 // assignment 520 weak_ptr& operator=(weak_ptr const& r) noexcept; 521 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 522 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 523 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 524 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 525 526 // modifiers 527 void swap(weak_ptr& r) noexcept; 528 void reset() noexcept; 529 530 // observers 531 long use_count() const noexcept; 532 bool expired() const noexcept; 533 shared_ptr<T> lock() const noexcept; 534 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 535 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 536}; 537 538// weak_ptr specialized algorithms: 539template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 540 541// class owner_less: 542template<class T> struct owner_less; 543 544template<class T> 545struct owner_less<shared_ptr<T>> 546 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 547{ 548 typedef bool result_type; 549 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 550 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 551 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 552}; 553 554template<class T> 555struct owner_less<weak_ptr<T>> 556 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 557{ 558 typedef bool result_type; 559 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 560 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 561 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 562}; 563 564template <> // Added in C++14 565struct owner_less<void> 566{ 567 template <class _Tp, class _Up> 568 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 569 template <class _Tp, class _Up> 570 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 571 template <class _Tp, class _Up> 572 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 573 template <class _Tp, class _Up> 574 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 575 576 typedef void is_transparent; 577}; 578 579template<class T> 580class enable_shared_from_this 581{ 582protected: 583 constexpr enable_shared_from_this() noexcept; 584 enable_shared_from_this(enable_shared_from_this const&) noexcept; 585 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 586 ~enable_shared_from_this(); 587public: 588 shared_ptr<T> shared_from_this(); 589 shared_ptr<T const> shared_from_this() const; 590}; 591 592template<class T> 593 bool atomic_is_lock_free(const shared_ptr<T>* p); 594template<class T> 595 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 596template<class T> 597 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 598template<class T> 599 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 600template<class T> 601 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 602template<class T> 603 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 604template<class T> 605 shared_ptr<T> 606 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 607template<class T> 608 bool 609 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 610template<class T> 611 bool 612 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 613template<class T> 614 bool 615 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 616 shared_ptr<T> w, memory_order success, 617 memory_order failure); 618template<class T> 619 bool 620 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 621 shared_ptr<T> w, memory_order success, 622 memory_order failure); 623// Hash support 624template <class T> struct hash; 625template <class T, class D> struct hash<unique_ptr<T, D> >; 626template <class T> struct hash<shared_ptr<T> >; 627 628// Pointer safety 629enum class pointer_safety { relaxed, preferred, strict }; 630void declare_reachable(void *p); 631template <class T> T *undeclare_reachable(T *p); 632void declare_no_pointers(char *p, size_t n); 633void undeclare_no_pointers(char *p, size_t n); 634pointer_safety get_pointer_safety() noexcept; 635 636void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 637 638} // std 639 640*/ 641 642#include <__config> 643#include <type_traits> 644#include <typeinfo> 645#include <cstddef> 646#include <cstdint> 647#include <new> 648#include <utility> 649#include <limits> 650#include <iterator> 651#include <__functional_base> 652#include <iosfwd> 653#include <tuple> 654#include <stdexcept> 655#include <cstring> 656#include <cassert> 657#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 658# include <atomic> 659#endif 660 661#include <__undef_min_max> 662 663#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 664#pragma GCC system_header 665#endif 666 667_LIBCPP_BEGIN_NAMESPACE_STD 668 669template <class _ValueType> 670inline _LIBCPP_ALWAYS_INLINE 671_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 672#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 673 defined(__ATOMIC_RELAXED) && \ 674 (__has_builtin(__atomic_load_n) || _GNUC_VER >= 407) 675 return __atomic_load_n(__value, __ATOMIC_RELAXED); 676#else 677 return *__value; 678#endif 679} 680 681template <class _ValueType> 682inline _LIBCPP_ALWAYS_INLINE 683_ValueType __libcpp_acquire_load(_ValueType const* __value) { 684#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 685 defined(__ATOMIC_ACQUIRE) && \ 686 (__has_builtin(__atomic_load_n) || _GNUC_VER >= 407) 687 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 688#else 689 return *__value; 690#endif 691} 692 693// addressof moved to <type_traits> 694 695template <class _Tp> class allocator; 696 697template <> 698class _LIBCPP_TEMPLATE_VIS allocator<void> 699{ 700public: 701 typedef void* pointer; 702 typedef const void* const_pointer; 703 typedef void value_type; 704 705 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 706}; 707 708template <> 709class _LIBCPP_TEMPLATE_VIS allocator<const void> 710{ 711public: 712 typedef const void* pointer; 713 typedef const void* const_pointer; 714 typedef const void value_type; 715 716 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 717}; 718 719// pointer_traits 720 721template <class _Tp> 722struct __has_element_type 723{ 724private: 725 struct __two {char __lx; char __lxx;}; 726 template <class _Up> static __two __test(...); 727 template <class _Up> static char __test(typename _Up::element_type* = 0); 728public: 729 static const bool value = sizeof(__test<_Tp>(0)) == 1; 730}; 731 732template <class _Ptr, bool = __has_element_type<_Ptr>::value> 733struct __pointer_traits_element_type; 734 735template <class _Ptr> 736struct __pointer_traits_element_type<_Ptr, true> 737{ 738 typedef typename _Ptr::element_type type; 739}; 740 741#ifndef _LIBCPP_HAS_NO_VARIADICS 742 743template <template <class, class...> class _Sp, class _Tp, class ..._Args> 744struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true> 745{ 746 typedef typename _Sp<_Tp, _Args...>::element_type type; 747}; 748 749template <template <class, class...> class _Sp, class _Tp, class ..._Args> 750struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false> 751{ 752 typedef _Tp type; 753}; 754 755#else // _LIBCPP_HAS_NO_VARIADICS 756 757template <template <class> class _Sp, class _Tp> 758struct __pointer_traits_element_type<_Sp<_Tp>, true> 759{ 760 typedef typename _Sp<_Tp>::element_type type; 761}; 762 763template <template <class> class _Sp, class _Tp> 764struct __pointer_traits_element_type<_Sp<_Tp>, false> 765{ 766 typedef _Tp type; 767}; 768 769template <template <class, class> class _Sp, class _Tp, class _A0> 770struct __pointer_traits_element_type<_Sp<_Tp, _A0>, true> 771{ 772 typedef typename _Sp<_Tp, _A0>::element_type type; 773}; 774 775template <template <class, class> class _Sp, class _Tp, class _A0> 776struct __pointer_traits_element_type<_Sp<_Tp, _A0>, false> 777{ 778 typedef _Tp type; 779}; 780 781template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 782struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, true> 783{ 784 typedef typename _Sp<_Tp, _A0, _A1>::element_type type; 785}; 786 787template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 788struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, false> 789{ 790 typedef _Tp type; 791}; 792 793template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 794 class _A1, class _A2> 795struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, true> 796{ 797 typedef typename _Sp<_Tp, _A0, _A1, _A2>::element_type type; 798}; 799 800template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 801 class _A1, class _A2> 802struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false> 803{ 804 typedef _Tp type; 805}; 806 807#endif // _LIBCPP_HAS_NO_VARIADICS 808 809template <class _Tp> 810struct __has_difference_type 811{ 812private: 813 struct __two {char __lx; char __lxx;}; 814 template <class _Up> static __two __test(...); 815 template <class _Up> static char __test(typename _Up::difference_type* = 0); 816public: 817 static const bool value = sizeof(__test<_Tp>(0)) == 1; 818}; 819 820template <class _Ptr, bool = __has_difference_type<_Ptr>::value> 821struct __pointer_traits_difference_type 822{ 823 typedef ptrdiff_t type; 824}; 825 826template <class _Ptr> 827struct __pointer_traits_difference_type<_Ptr, true> 828{ 829 typedef typename _Ptr::difference_type type; 830}; 831 832template <class _Tp, class _Up> 833struct __has_rebind 834{ 835private: 836 struct __two {char __lx; char __lxx;}; 837 template <class _Xp> static __two __test(...); 838 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0); 839public: 840 static const bool value = sizeof(__test<_Tp>(0)) == 1; 841}; 842 843template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 844struct __pointer_traits_rebind 845{ 846#ifndef _LIBCPP_CXX03_LANG 847 typedef typename _Tp::template rebind<_Up> type; 848#else 849 typedef typename _Tp::template rebind<_Up>::other type; 850#endif 851}; 852 853#ifndef _LIBCPP_HAS_NO_VARIADICS 854 855template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 856struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true> 857{ 858#ifndef _LIBCPP_CXX03_LANG 859 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up> type; 860#else 861 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type; 862#endif 863}; 864 865template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 866struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false> 867{ 868 typedef _Sp<_Up, _Args...> type; 869}; 870 871#else // _LIBCPP_HAS_NO_VARIADICS 872 873template <template <class> class _Sp, class _Tp, class _Up> 874struct __pointer_traits_rebind<_Sp<_Tp>, _Up, true> 875{ 876#ifndef _LIBCPP_CXX03_LANG 877 typedef typename _Sp<_Tp>::template rebind<_Up> type; 878#else 879 typedef typename _Sp<_Tp>::template rebind<_Up>::other type; 880#endif 881}; 882 883template <template <class> class _Sp, class _Tp, class _Up> 884struct __pointer_traits_rebind<_Sp<_Tp>, _Up, false> 885{ 886 typedef _Sp<_Up> type; 887}; 888 889template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 890struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, true> 891{ 892#ifndef _LIBCPP_CXX03_LANG 893 typedef typename _Sp<_Tp, _A0>::template rebind<_Up> type; 894#else 895 typedef typename _Sp<_Tp, _A0>::template rebind<_Up>::other type; 896#endif 897}; 898 899template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 900struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, false> 901{ 902 typedef _Sp<_Up, _A0> type; 903}; 904 905template <template <class, class, class> class _Sp, class _Tp, class _A0, 906 class _A1, class _Up> 907struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, true> 908{ 909#ifndef _LIBCPP_CXX03_LANG 910 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up> type; 911#else 912 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up>::other type; 913#endif 914}; 915 916template <template <class, class, class> class _Sp, class _Tp, class _A0, 917 class _A1, class _Up> 918struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, false> 919{ 920 typedef _Sp<_Up, _A0, _A1> type; 921}; 922 923template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 924 class _A1, class _A2, class _Up> 925struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, true> 926{ 927#ifndef _LIBCPP_CXX03_LANG 928 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up> type; 929#else 930 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 931#endif 932}; 933 934template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 935 class _A1, class _A2, class _Up> 936struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, false> 937{ 938 typedef _Sp<_Up, _A0, _A1, _A2> type; 939}; 940 941#endif // _LIBCPP_HAS_NO_VARIADICS 942 943template <class _Ptr> 944struct _LIBCPP_TEMPLATE_VIS pointer_traits 945{ 946 typedef _Ptr pointer; 947 typedef typename __pointer_traits_element_type<pointer>::type element_type; 948 typedef typename __pointer_traits_difference_type<pointer>::type difference_type; 949 950#ifndef _LIBCPP_CXX03_LANG 951 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type; 952#else 953 template <class _Up> struct rebind 954 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;}; 955#endif // _LIBCPP_CXX03_LANG 956 957private: 958 struct __nat {}; 959public: 960 _LIBCPP_INLINE_VISIBILITY 961 static pointer pointer_to(typename conditional<is_void<element_type>::value, 962 __nat, element_type>::type& __r) 963 {return pointer::pointer_to(__r);} 964}; 965 966template <class _Tp> 967struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*> 968{ 969 typedef _Tp* pointer; 970 typedef _Tp element_type; 971 typedef ptrdiff_t difference_type; 972 973#ifndef _LIBCPP_CXX03_LANG 974 template <class _Up> using rebind = _Up*; 975#else 976 template <class _Up> struct rebind {typedef _Up* other;}; 977#endif 978 979private: 980 struct __nat {}; 981public: 982 _LIBCPP_INLINE_VISIBILITY 983 static pointer pointer_to(typename conditional<is_void<element_type>::value, 984 __nat, element_type>::type& __r) _NOEXCEPT 985 {return _VSTD::addressof(__r);} 986}; 987 988template <class _From, class _To> 989struct __rebind_pointer { 990#ifndef _LIBCPP_CXX03_LANG 991 typedef typename pointer_traits<_From>::template rebind<_To> type; 992#else 993 typedef typename pointer_traits<_From>::template rebind<_To>::other type; 994#endif 995}; 996 997// allocator_traits 998 999struct __has_pointer_type_imp 1000{ 1001 template <class _Up> static __two __test(...); 1002 template <class _Up> static char __test(typename _Up::pointer* = 0); 1003}; 1004 1005template <class _Tp> 1006struct __has_pointer_type 1007 : public integral_constant<bool, sizeof(__has_pointer_type_imp::__test<_Tp>(0)) == 1> 1008{ 1009}; 1010 1011namespace __pointer_type_imp 1012{ 1013 1014template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value> 1015struct __pointer_type 1016{ 1017 typedef typename _Dp::pointer type; 1018}; 1019 1020template <class _Tp, class _Dp> 1021struct __pointer_type<_Tp, _Dp, false> 1022{ 1023 typedef _Tp* type; 1024}; 1025 1026} // __pointer_type_imp 1027 1028template <class _Tp, class _Dp> 1029struct __pointer_type 1030{ 1031 typedef typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; 1032}; 1033 1034template <class _Tp> 1035struct __has_const_pointer 1036{ 1037private: 1038 struct __two {char __lx; char __lxx;}; 1039 template <class _Up> static __two __test(...); 1040 template <class _Up> static char __test(typename _Up::const_pointer* = 0); 1041public: 1042 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1043}; 1044 1045template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> 1046struct __const_pointer 1047{ 1048 typedef typename _Alloc::const_pointer type; 1049}; 1050 1051template <class _Tp, class _Ptr, class _Alloc> 1052struct __const_pointer<_Tp, _Ptr, _Alloc, false> 1053{ 1054#ifndef _LIBCPP_CXX03_LANG 1055 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp> type; 1056#else 1057 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type; 1058#endif 1059}; 1060 1061template <class _Tp> 1062struct __has_void_pointer 1063{ 1064private: 1065 struct __two {char __lx; char __lxx;}; 1066 template <class _Up> static __two __test(...); 1067 template <class _Up> static char __test(typename _Up::void_pointer* = 0); 1068public: 1069 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1070}; 1071 1072template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> 1073struct __void_pointer 1074{ 1075 typedef typename _Alloc::void_pointer type; 1076}; 1077 1078template <class _Ptr, class _Alloc> 1079struct __void_pointer<_Ptr, _Alloc, false> 1080{ 1081#ifndef _LIBCPP_CXX03_LANG 1082 typedef typename pointer_traits<_Ptr>::template rebind<void> type; 1083#else 1084 typedef typename pointer_traits<_Ptr>::template rebind<void>::other type; 1085#endif 1086}; 1087 1088template <class _Tp> 1089struct __has_const_void_pointer 1090{ 1091private: 1092 struct __two {char __lx; char __lxx;}; 1093 template <class _Up> static __two __test(...); 1094 template <class _Up> static char __test(typename _Up::const_void_pointer* = 0); 1095public: 1096 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1097}; 1098 1099template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> 1100struct __const_void_pointer 1101{ 1102 typedef typename _Alloc::const_void_pointer type; 1103}; 1104 1105template <class _Ptr, class _Alloc> 1106struct __const_void_pointer<_Ptr, _Alloc, false> 1107{ 1108#ifndef _LIBCPP_CXX03_LANG 1109 typedef typename pointer_traits<_Ptr>::template rebind<const void> type; 1110#else 1111 typedef typename pointer_traits<_Ptr>::template rebind<const void>::other type; 1112#endif 1113}; 1114 1115template <class _Tp> 1116inline _LIBCPP_INLINE_VISIBILITY 1117_Tp* 1118__to_raw_pointer(_Tp* __p) _NOEXCEPT 1119{ 1120 return __p; 1121} 1122 1123template <class _Pointer> 1124inline _LIBCPP_INLINE_VISIBILITY 1125typename pointer_traits<_Pointer>::element_type* 1126__to_raw_pointer(_Pointer __p) _NOEXCEPT 1127{ 1128 return _VSTD::__to_raw_pointer(__p.operator->()); 1129} 1130 1131template <class _Tp> 1132struct __has_size_type 1133{ 1134private: 1135 struct __two {char __lx; char __lxx;}; 1136 template <class _Up> static __two __test(...); 1137 template <class _Up> static char __test(typename _Up::size_type* = 0); 1138public: 1139 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1140}; 1141 1142template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> 1143struct __size_type 1144{ 1145 typedef typename make_unsigned<_DiffType>::type type; 1146}; 1147 1148template <class _Alloc, class _DiffType> 1149struct __size_type<_Alloc, _DiffType, true> 1150{ 1151 typedef typename _Alloc::size_type type; 1152}; 1153 1154template <class _Tp> 1155struct __has_propagate_on_container_copy_assignment 1156{ 1157private: 1158 struct __two {char __lx; char __lxx;}; 1159 template <class _Up> static __two __test(...); 1160 template <class _Up> static char __test(typename _Up::propagate_on_container_copy_assignment* = 0); 1161public: 1162 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1163}; 1164 1165template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> 1166struct __propagate_on_container_copy_assignment 1167{ 1168 typedef false_type type; 1169}; 1170 1171template <class _Alloc> 1172struct __propagate_on_container_copy_assignment<_Alloc, true> 1173{ 1174 typedef typename _Alloc::propagate_on_container_copy_assignment type; 1175}; 1176 1177template <class _Tp> 1178struct __has_propagate_on_container_move_assignment 1179{ 1180private: 1181 struct __two {char __lx; char __lxx;}; 1182 template <class _Up> static __two __test(...); 1183 template <class _Up> static char __test(typename _Up::propagate_on_container_move_assignment* = 0); 1184public: 1185 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1186}; 1187 1188template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> 1189struct __propagate_on_container_move_assignment 1190{ 1191 typedef false_type type; 1192}; 1193 1194template <class _Alloc> 1195struct __propagate_on_container_move_assignment<_Alloc, true> 1196{ 1197 typedef typename _Alloc::propagate_on_container_move_assignment type; 1198}; 1199 1200template <class _Tp> 1201struct __has_propagate_on_container_swap 1202{ 1203private: 1204 struct __two {char __lx; char __lxx;}; 1205 template <class _Up> static __two __test(...); 1206 template <class _Up> static char __test(typename _Up::propagate_on_container_swap* = 0); 1207public: 1208 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1209}; 1210 1211template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> 1212struct __propagate_on_container_swap 1213{ 1214 typedef false_type type; 1215}; 1216 1217template <class _Alloc> 1218struct __propagate_on_container_swap<_Alloc, true> 1219{ 1220 typedef typename _Alloc::propagate_on_container_swap type; 1221}; 1222 1223template <class _Tp> 1224struct __has_is_always_equal 1225{ 1226private: 1227 struct __two {char __lx; char __lxx;}; 1228 template <class _Up> static __two __test(...); 1229 template <class _Up> static char __test(typename _Up::is_always_equal* = 0); 1230public: 1231 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1232}; 1233 1234template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> 1235struct __is_always_equal 1236{ 1237 typedef typename _VSTD::is_empty<_Alloc>::type type; 1238}; 1239 1240template <class _Alloc> 1241struct __is_always_equal<_Alloc, true> 1242{ 1243 typedef typename _Alloc::is_always_equal type; 1244}; 1245 1246template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 1247struct __has_rebind_other 1248{ 1249private: 1250 struct __two {char __lx; char __lxx;}; 1251 template <class _Xp> static __two __test(...); 1252 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0); 1253public: 1254 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1255}; 1256 1257template <class _Tp, class _Up> 1258struct __has_rebind_other<_Tp, _Up, false> 1259{ 1260 static const bool value = false; 1261}; 1262 1263template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value> 1264struct __allocator_traits_rebind 1265{ 1266 typedef typename _Tp::template rebind<_Up>::other type; 1267}; 1268 1269#ifndef _LIBCPP_HAS_NO_VARIADICS 1270 1271template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1272struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true> 1273{ 1274 typedef typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type; 1275}; 1276 1277template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1278struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false> 1279{ 1280 typedef _Alloc<_Up, _Args...> type; 1281}; 1282 1283#else // _LIBCPP_HAS_NO_VARIADICS 1284 1285template <template <class> class _Alloc, class _Tp, class _Up> 1286struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, true> 1287{ 1288 typedef typename _Alloc<_Tp>::template rebind<_Up>::other type; 1289}; 1290 1291template <template <class> class _Alloc, class _Tp, class _Up> 1292struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, false> 1293{ 1294 typedef _Alloc<_Up> type; 1295}; 1296 1297template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1298struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, true> 1299{ 1300 typedef typename _Alloc<_Tp, _A0>::template rebind<_Up>::other type; 1301}; 1302 1303template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1304struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, false> 1305{ 1306 typedef _Alloc<_Up, _A0> type; 1307}; 1308 1309template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1310 class _A1, class _Up> 1311struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, true> 1312{ 1313 typedef typename _Alloc<_Tp, _A0, _A1>::template rebind<_Up>::other type; 1314}; 1315 1316template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1317 class _A1, class _Up> 1318struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, false> 1319{ 1320 typedef _Alloc<_Up, _A0, _A1> type; 1321}; 1322 1323template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1324 class _A1, class _A2, class _Up> 1325struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, true> 1326{ 1327 typedef typename _Alloc<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 1328}; 1329 1330template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1331 class _A1, class _A2, class _Up> 1332struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, false> 1333{ 1334 typedef _Alloc<_Up, _A0, _A1, _A2> type; 1335}; 1336 1337#endif // _LIBCPP_HAS_NO_VARIADICS 1338 1339#ifndef _LIBCPP_CXX03_LANG 1340 1341template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1342auto 1343__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1344 -> decltype(__a.allocate(__sz, __p), true_type()); 1345 1346template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1347auto 1348__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1349 -> false_type; 1350 1351template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1352struct __has_allocate_hint 1353 : integral_constant<bool, 1354 is_same< 1355 decltype(__has_allocate_hint_test(declval<_Alloc>(), 1356 declval<_SizeType>(), 1357 declval<_ConstVoidPtr>())), 1358 true_type>::value> 1359{ 1360}; 1361 1362#else // _LIBCPP_CXX03_LANG 1363 1364template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1365struct __has_allocate_hint 1366 : true_type 1367{ 1368}; 1369 1370#endif // _LIBCPP_CXX03_LANG 1371 1372#if !defined(_LIBCPP_CXX03_LANG) 1373 1374template <class _Alloc, class _Tp, class ..._Args> 1375decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Tp*>(), 1376 _VSTD::declval<_Args>()...), 1377 true_type()) 1378__has_construct_test(_Alloc&& __a, _Tp* __p, _Args&& ...__args); 1379 1380template <class _Alloc, class _Pointer, class ..._Args> 1381false_type 1382__has_construct_test(const _Alloc& __a, _Pointer&& __p, _Args&& ...__args); 1383 1384template <class _Alloc, class _Pointer, class ..._Args> 1385struct __has_construct 1386 : integral_constant<bool, 1387 is_same< 1388 decltype(__has_construct_test(declval<_Alloc>(), 1389 declval<_Pointer>(), 1390 declval<_Args>()...)), 1391 true_type>::value> 1392{ 1393}; 1394 1395template <class _Alloc, class _Pointer> 1396auto 1397__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1398 -> decltype(__a.destroy(__p), true_type()); 1399 1400template <class _Alloc, class _Pointer> 1401auto 1402__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1403 -> false_type; 1404 1405template <class _Alloc, class _Pointer> 1406struct __has_destroy 1407 : integral_constant<bool, 1408 is_same< 1409 decltype(__has_destroy_test(declval<_Alloc>(), 1410 declval<_Pointer>())), 1411 true_type>::value> 1412{ 1413}; 1414 1415template <class _Alloc> 1416auto 1417__has_max_size_test(_Alloc&& __a) 1418 -> decltype(__a.max_size(), true_type()); 1419 1420template <class _Alloc> 1421auto 1422__has_max_size_test(const volatile _Alloc& __a) 1423 -> false_type; 1424 1425template <class _Alloc> 1426struct __has_max_size 1427 : integral_constant<bool, 1428 is_same< 1429 decltype(__has_max_size_test(declval<_Alloc&>())), 1430 true_type>::value> 1431{ 1432}; 1433 1434template <class _Alloc> 1435auto 1436__has_select_on_container_copy_construction_test(_Alloc&& __a) 1437 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1438 1439template <class _Alloc> 1440auto 1441__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1442 -> false_type; 1443 1444template <class _Alloc> 1445struct __has_select_on_container_copy_construction 1446 : integral_constant<bool, 1447 is_same< 1448 decltype(__has_select_on_container_copy_construction_test(declval<_Alloc&>())), 1449 true_type>::value> 1450{ 1451}; 1452 1453#else // _LIBCPP_CXX03_LANG 1454 1455#ifndef _LIBCPP_HAS_NO_VARIADICS 1456 1457template <class _Alloc, class _Pointer, class ..._Args> 1458struct __has_construct 1459 : false_type 1460{ 1461}; 1462 1463#else // _LIBCPP_HAS_NO_VARIADICS 1464 1465template <class _Alloc, class _Pointer, class _Args> 1466struct __has_construct 1467 : false_type 1468{ 1469}; 1470 1471#endif // _LIBCPP_HAS_NO_VARIADICS 1472 1473template <class _Alloc, class _Pointer> 1474struct __has_destroy 1475 : false_type 1476{ 1477}; 1478 1479template <class _Alloc> 1480struct __has_max_size 1481 : true_type 1482{ 1483}; 1484 1485template <class _Alloc> 1486struct __has_select_on_container_copy_construction 1487 : false_type 1488{ 1489}; 1490 1491#endif // _LIBCPP_CXX03_LANG 1492 1493template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1494struct __alloc_traits_difference_type 1495{ 1496 typedef typename pointer_traits<_Ptr>::difference_type type; 1497}; 1498 1499template <class _Alloc, class _Ptr> 1500struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1501{ 1502 typedef typename _Alloc::difference_type type; 1503}; 1504 1505template <class _Alloc> 1506struct _LIBCPP_TEMPLATE_VIS allocator_traits 1507{ 1508 typedef _Alloc allocator_type; 1509 typedef typename allocator_type::value_type value_type; 1510 1511 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1512 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1513 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1514 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1515 1516 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1517 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1518 1519 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1520 propagate_on_container_copy_assignment; 1521 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1522 propagate_on_container_move_assignment; 1523 typedef typename __propagate_on_container_swap<allocator_type>::type 1524 propagate_on_container_swap; 1525 typedef typename __is_always_equal<allocator_type>::type 1526 is_always_equal; 1527 1528#ifndef _LIBCPP_CXX03_LANG 1529 template <class _Tp> using rebind_alloc = 1530 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1531 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp>>; 1532#else // _LIBCPP_CXX03_LANG 1533 template <class _Tp> struct rebind_alloc 1534 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1535 template <class _Tp> struct rebind_traits 1536 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1537#endif // _LIBCPP_CXX03_LANG 1538 1539 _LIBCPP_INLINE_VISIBILITY 1540 static pointer allocate(allocator_type& __a, size_type __n) 1541 {return __a.allocate(__n);} 1542 _LIBCPP_INLINE_VISIBILITY 1543 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1544 {return allocate(__a, __n, __hint, 1545 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1546 1547 _LIBCPP_INLINE_VISIBILITY 1548 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1549 {__a.deallocate(__p, __n);} 1550 1551#ifndef _LIBCPP_HAS_NO_VARIADICS 1552 template <class _Tp, class... _Args> 1553 _LIBCPP_INLINE_VISIBILITY 1554 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1555 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1556 __a, __p, _VSTD::forward<_Args>(__args)...);} 1557#else // _LIBCPP_HAS_NO_VARIADICS 1558 template <class _Tp> 1559 _LIBCPP_INLINE_VISIBILITY 1560 static void construct(allocator_type&, _Tp* __p) 1561 { 1562 ::new ((void*)__p) _Tp(); 1563 } 1564 template <class _Tp, class _A0> 1565 _LIBCPP_INLINE_VISIBILITY 1566 static void construct(allocator_type&, _Tp* __p, const _A0& __a0) 1567 { 1568 ::new ((void*)__p) _Tp(__a0); 1569 } 1570 template <class _Tp, class _A0, class _A1> 1571 _LIBCPP_INLINE_VISIBILITY 1572 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1573 const _A1& __a1) 1574 { 1575 ::new ((void*)__p) _Tp(__a0, __a1); 1576 } 1577 template <class _Tp, class _A0, class _A1, class _A2> 1578 _LIBCPP_INLINE_VISIBILITY 1579 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1580 const _A1& __a1, const _A2& __a2) 1581 { 1582 ::new ((void*)__p) _Tp(__a0, __a1, __a2); 1583 } 1584#endif // _LIBCPP_HAS_NO_VARIADICS 1585 1586 template <class _Tp> 1587 _LIBCPP_INLINE_VISIBILITY 1588 static void destroy(allocator_type& __a, _Tp* __p) 1589 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1590 1591 _LIBCPP_INLINE_VISIBILITY 1592 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1593 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1594 1595 _LIBCPP_INLINE_VISIBILITY 1596 static allocator_type 1597 select_on_container_copy_construction(const allocator_type& __a) 1598 {return select_on_container_copy_construction( 1599 __has_select_on_container_copy_construction<const allocator_type>(), 1600 __a);} 1601 1602 template <class _Ptr> 1603 _LIBCPP_INLINE_VISIBILITY 1604 static 1605 void 1606 __construct_forward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1607 { 1608 for (; __begin1 != __end1; ++__begin1, ++__begin2) 1609 construct(__a, _VSTD::__to_raw_pointer(__begin2), _VSTD::move_if_noexcept(*__begin1)); 1610 } 1611 1612 template <class _Tp> 1613 _LIBCPP_INLINE_VISIBILITY 1614 static 1615 typename enable_if 1616 < 1617 (is_same<allocator_type, allocator<_Tp> >::value 1618 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1619 is_trivially_move_constructible<_Tp>::value, 1620 void 1621 >::type 1622 __construct_forward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1623 { 1624 ptrdiff_t _Np = __end1 - __begin1; 1625 if (_Np > 0) 1626 { 1627 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1628 __begin2 += _Np; 1629 } 1630 } 1631 1632 template <class _Iter, class _Ptr> 1633 _LIBCPP_INLINE_VISIBILITY 1634 static 1635 void 1636 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1637 { 1638 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1639 construct(__a, _VSTD::__to_raw_pointer(__begin2), *__begin1); 1640 } 1641 1642 template <class _Tp> 1643 _LIBCPP_INLINE_VISIBILITY 1644 static 1645 typename enable_if 1646 < 1647 (is_same<allocator_type, allocator<_Tp> >::value 1648 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1649 is_trivially_move_constructible<_Tp>::value, 1650 void 1651 >::type 1652 __construct_range_forward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1653 { 1654 typedef typename remove_const<_Tp>::type _Vp; 1655 ptrdiff_t _Np = __end1 - __begin1; 1656 if (_Np > 0) 1657 { 1658 _VSTD::memcpy(const_cast<_Vp*>(__begin2), __begin1, _Np * sizeof(_Tp)); 1659 __begin2 += _Np; 1660 } 1661 } 1662 1663 template <class _Ptr> 1664 _LIBCPP_INLINE_VISIBILITY 1665 static 1666 void 1667 __construct_backward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1668 { 1669 while (__end1 != __begin1) 1670 { 1671 construct(__a, _VSTD::__to_raw_pointer(__end2-1), _VSTD::move_if_noexcept(*--__end1)); 1672 --__end2; 1673 } 1674 } 1675 1676 template <class _Tp> 1677 _LIBCPP_INLINE_VISIBILITY 1678 static 1679 typename enable_if 1680 < 1681 (is_same<allocator_type, allocator<_Tp> >::value 1682 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1683 is_trivially_move_constructible<_Tp>::value, 1684 void 1685 >::type 1686 __construct_backward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1687 { 1688 ptrdiff_t _Np = __end1 - __begin1; 1689 __end2 -= _Np; 1690 if (_Np > 0) 1691 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1692 } 1693 1694private: 1695 1696 _LIBCPP_INLINE_VISIBILITY 1697 static pointer allocate(allocator_type& __a, size_type __n, 1698 const_void_pointer __hint, true_type) 1699 {return __a.allocate(__n, __hint);} 1700 _LIBCPP_INLINE_VISIBILITY 1701 static pointer allocate(allocator_type& __a, size_type __n, 1702 const_void_pointer, false_type) 1703 {return __a.allocate(__n);} 1704 1705#ifndef _LIBCPP_HAS_NO_VARIADICS 1706 template <class _Tp, class... _Args> 1707 _LIBCPP_INLINE_VISIBILITY 1708 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1709 {__a.construct(__p, _VSTD::forward<_Args>(__args)...);} 1710 template <class _Tp, class... _Args> 1711 _LIBCPP_INLINE_VISIBILITY 1712 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1713 { 1714 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1715 } 1716#endif // _LIBCPP_HAS_NO_VARIADICS 1717 1718 template <class _Tp> 1719 _LIBCPP_INLINE_VISIBILITY 1720 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1721 {__a.destroy(__p);} 1722 template <class _Tp> 1723 _LIBCPP_INLINE_VISIBILITY 1724 static void __destroy(false_type, allocator_type&, _Tp* __p) 1725 { 1726 __p->~_Tp(); 1727 } 1728 1729 _LIBCPP_INLINE_VISIBILITY 1730 static size_type __max_size(true_type, const allocator_type& __a) 1731 {return __a.max_size();} 1732 _LIBCPP_INLINE_VISIBILITY 1733 static size_type __max_size(false_type, const allocator_type&) 1734 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1735 1736 _LIBCPP_INLINE_VISIBILITY 1737 static allocator_type 1738 select_on_container_copy_construction(true_type, const allocator_type& __a) 1739 {return __a.select_on_container_copy_construction();} 1740 _LIBCPP_INLINE_VISIBILITY 1741 static allocator_type 1742 select_on_container_copy_construction(false_type, const allocator_type& __a) 1743 {return __a;} 1744}; 1745 1746template <class _Traits, class _Tp> 1747struct __rebind_alloc_helper 1748{ 1749#ifndef _LIBCPP_CXX03_LANG 1750 typedef typename _Traits::template rebind_alloc<_Tp> type; 1751#else 1752 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1753#endif 1754}; 1755 1756// allocator 1757 1758template <class _Tp> 1759class _LIBCPP_TEMPLATE_VIS allocator 1760{ 1761public: 1762 typedef size_t size_type; 1763 typedef ptrdiff_t difference_type; 1764 typedef _Tp* pointer; 1765 typedef const _Tp* const_pointer; 1766 typedef _Tp& reference; 1767 typedef const _Tp& const_reference; 1768 typedef _Tp value_type; 1769 1770 typedef true_type propagate_on_container_move_assignment; 1771 typedef true_type is_always_equal; 1772 1773 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1774 1775 _LIBCPP_INLINE_VISIBILITY allocator() _NOEXCEPT {} 1776 template <class _Up> _LIBCPP_INLINE_VISIBILITY allocator(const allocator<_Up>&) _NOEXCEPT {} 1777 _LIBCPP_INLINE_VISIBILITY pointer address(reference __x) const _NOEXCEPT 1778 {return _VSTD::addressof(__x);} 1779 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1780 {return _VSTD::addressof(__x);} 1781 _LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1782 { 1783 if (__n > max_size()) 1784 __throw_length_error("allocator<T>::allocate(size_t n)" 1785 " 'n' exceeds maximum supported size"); 1786 return static_cast<pointer>(_VSTD::__allocate(__n * sizeof(_Tp))); 1787 } 1788 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type) _NOEXCEPT 1789 {_VSTD::__libcpp_deallocate((void*)__p);} 1790 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1791 {return size_type(~0) / sizeof(_Tp);} 1792#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1793 template <class _Up, class... _Args> 1794 _LIBCPP_INLINE_VISIBILITY 1795 void 1796 construct(_Up* __p, _Args&&... __args) 1797 { 1798 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1799 } 1800#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1801 _LIBCPP_INLINE_VISIBILITY 1802 void 1803 construct(pointer __p) 1804 { 1805 ::new((void*)__p) _Tp(); 1806 } 1807# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1808 1809 template <class _A0> 1810 _LIBCPP_INLINE_VISIBILITY 1811 void 1812 construct(pointer __p, _A0& __a0) 1813 { 1814 ::new((void*)__p) _Tp(__a0); 1815 } 1816 template <class _A0> 1817 _LIBCPP_INLINE_VISIBILITY 1818 void 1819 construct(pointer __p, const _A0& __a0) 1820 { 1821 ::new((void*)__p) _Tp(__a0); 1822 } 1823# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1824 template <class _A0, class _A1> 1825 _LIBCPP_INLINE_VISIBILITY 1826 void 1827 construct(pointer __p, _A0& __a0, _A1& __a1) 1828 { 1829 ::new((void*)__p) _Tp(__a0, __a1); 1830 } 1831 template <class _A0, class _A1> 1832 _LIBCPP_INLINE_VISIBILITY 1833 void 1834 construct(pointer __p, const _A0& __a0, _A1& __a1) 1835 { 1836 ::new((void*)__p) _Tp(__a0, __a1); 1837 } 1838 template <class _A0, class _A1> 1839 _LIBCPP_INLINE_VISIBILITY 1840 void 1841 construct(pointer __p, _A0& __a0, const _A1& __a1) 1842 { 1843 ::new((void*)__p) _Tp(__a0, __a1); 1844 } 1845 template <class _A0, class _A1> 1846 _LIBCPP_INLINE_VISIBILITY 1847 void 1848 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1849 { 1850 ::new((void*)__p) _Tp(__a0, __a1); 1851 } 1852#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1853 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1854}; 1855 1856template <class _Tp> 1857class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1858{ 1859public: 1860 typedef size_t size_type; 1861 typedef ptrdiff_t difference_type; 1862 typedef const _Tp* pointer; 1863 typedef const _Tp* const_pointer; 1864 typedef const _Tp& reference; 1865 typedef const _Tp& const_reference; 1866 typedef const _Tp value_type; 1867 1868 typedef true_type propagate_on_container_move_assignment; 1869 typedef true_type is_always_equal; 1870 1871 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1872 1873 _LIBCPP_INLINE_VISIBILITY allocator() _NOEXCEPT {} 1874 template <class _Up> _LIBCPP_INLINE_VISIBILITY allocator(const allocator<_Up>&) _NOEXCEPT {} 1875 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1876 {return _VSTD::addressof(__x);} 1877 _LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1878 { 1879 if (__n > max_size()) 1880 __throw_length_error("allocator<const T>::allocate(size_t n)" 1881 " 'n' exceeds maximum supported size"); 1882 return static_cast<pointer>(_VSTD::__allocate(__n * sizeof(_Tp))); 1883 } 1884 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type) _NOEXCEPT 1885 {_VSTD::__libcpp_deallocate((void*)__p);} 1886 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1887 {return size_type(~0) / sizeof(_Tp);} 1888#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1889 template <class _Up, class... _Args> 1890 _LIBCPP_INLINE_VISIBILITY 1891 void 1892 construct(_Up* __p, _Args&&... __args) 1893 { 1894 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1895 } 1896#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1897 _LIBCPP_INLINE_VISIBILITY 1898 void 1899 construct(pointer __p) 1900 { 1901 ::new((void*)__p) _Tp(); 1902 } 1903# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1904 1905 template <class _A0> 1906 _LIBCPP_INLINE_VISIBILITY 1907 void 1908 construct(pointer __p, _A0& __a0) 1909 { 1910 ::new((void*)__p) _Tp(__a0); 1911 } 1912 template <class _A0> 1913 _LIBCPP_INLINE_VISIBILITY 1914 void 1915 construct(pointer __p, const _A0& __a0) 1916 { 1917 ::new((void*)__p) _Tp(__a0); 1918 } 1919# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1920 template <class _A0, class _A1> 1921 _LIBCPP_INLINE_VISIBILITY 1922 void 1923 construct(pointer __p, _A0& __a0, _A1& __a1) 1924 { 1925 ::new((void*)__p) _Tp(__a0, __a1); 1926 } 1927 template <class _A0, class _A1> 1928 _LIBCPP_INLINE_VISIBILITY 1929 void 1930 construct(pointer __p, const _A0& __a0, _A1& __a1) 1931 { 1932 ::new((void*)__p) _Tp(__a0, __a1); 1933 } 1934 template <class _A0, class _A1> 1935 _LIBCPP_INLINE_VISIBILITY 1936 void 1937 construct(pointer __p, _A0& __a0, const _A1& __a1) 1938 { 1939 ::new((void*)__p) _Tp(__a0, __a1); 1940 } 1941 template <class _A0, class _A1> 1942 _LIBCPP_INLINE_VISIBILITY 1943 void 1944 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1945 { 1946 ::new((void*)__p) _Tp(__a0, __a1); 1947 } 1948#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1949 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1950}; 1951 1952template <class _Tp, class _Up> 1953inline _LIBCPP_INLINE_VISIBILITY 1954bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 1955 1956template <class _Tp, class _Up> 1957inline _LIBCPP_INLINE_VISIBILITY 1958bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 1959 1960template <class _OutputIterator, class _Tp> 1961class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1962 : public iterator<output_iterator_tag, 1963 _Tp, // purposefully not C++03 1964 ptrdiff_t, // purposefully not C++03 1965 _Tp*, // purposefully not C++03 1966 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1967{ 1968private: 1969 _OutputIterator __x_; 1970public: 1971 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 1972 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 1973 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 1974 {::new(&*__x_) _Tp(__element); return *this;} 1975#if _LIBCPP_STD_VER >= 14 1976 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 1977 {::new(&*__x_) _Tp(_VSTD::move(__element)); return *this;} 1978#endif 1979 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 1980 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 1981 {raw_storage_iterator __t(*this); ++__x_; return __t;} 1982#if _LIBCPP_STD_VER >= 14 1983 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 1984#endif 1985}; 1986 1987template <class _Tp> 1988pair<_Tp*, ptrdiff_t> 1989get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 1990{ 1991 pair<_Tp*, ptrdiff_t> __r(0, 0); 1992 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 1993 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 1994 / sizeof(_Tp); 1995 if (__n > __m) 1996 __n = __m; 1997 while (__n > 0) 1998 { 1999 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 2000 if (__r.first) 2001 { 2002 __r.second = __n; 2003 break; 2004 } 2005 __n /= 2; 2006 } 2007 return __r; 2008} 2009 2010template <class _Tp> 2011inline _LIBCPP_INLINE_VISIBILITY 2012void return_temporary_buffer(_Tp* __p) _NOEXCEPT {::operator delete(__p);} 2013 2014#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2015template <class _Tp> 2016struct auto_ptr_ref 2017{ 2018 _Tp* __ptr_; 2019}; 2020 2021template<class _Tp> 2022class _LIBCPP_TEMPLATE_VIS auto_ptr 2023{ 2024private: 2025 _Tp* __ptr_; 2026public: 2027 typedef _Tp element_type; 2028 2029 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) throw() : __ptr_(__p) {} 2030 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) throw() : __ptr_(__p.release()) {} 2031 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) throw() 2032 : __ptr_(__p.release()) {} 2033 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) throw() 2034 {reset(__p.release()); return *this;} 2035 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) throw() 2036 {reset(__p.release()); return *this;} 2037 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) throw() 2038 {reset(__p.__ptr_); return *this;} 2039 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() throw() {delete __ptr_;} 2040 2041 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const throw() 2042 {return *__ptr_;} 2043 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const throw() {return __ptr_;} 2044 _LIBCPP_INLINE_VISIBILITY _Tp* get() const throw() {return __ptr_;} 2045 _LIBCPP_INLINE_VISIBILITY _Tp* release() throw() 2046 { 2047 _Tp* __t = __ptr_; 2048 __ptr_ = 0; 2049 return __t; 2050 } 2051 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) throw() 2052 { 2053 if (__ptr_ != __p) 2054 delete __ptr_; 2055 __ptr_ = __p; 2056 } 2057 2058 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) throw() : __ptr_(__p.__ptr_) {} 2059 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() throw() 2060 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 2061 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() throw() 2062 {return auto_ptr<_Up>(release());} 2063}; 2064 2065template <> 2066class _LIBCPP_TEMPLATE_VIS auto_ptr<void> 2067{ 2068public: 2069 typedef void element_type; 2070}; 2071#endif 2072 2073template <class _Tp, int _Idx, 2074 bool _CanBeEmptyBase = 2075 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 2076struct __compressed_pair_elem { 2077 typedef _Tp _ParamT; 2078 typedef _Tp& reference; 2079 typedef const _Tp& const_reference; 2080 2081#ifndef _LIBCPP_CXX03_LANG 2082 constexpr __compressed_pair_elem() : __value_() {} 2083 2084 template <class _Up, class = typename enable_if< 2085 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2086 >::type> 2087 constexpr explicit 2088 __compressed_pair_elem(_Up&& __u) 2089 : __value_(_VSTD::forward<_Up>(__u)){}; 2090 2091 template <class... _Args, size_t... _Indexes> 2092 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2093 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2094 __tuple_indices<_Indexes...>) 2095 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2096#else 2097 __compressed_pair_elem() : __value_() {} 2098 __compressed_pair_elem(_ParamT __p) : __value_(std::forward<_ParamT>(__p)) {} 2099#endif 2100 2101 reference __get() _NOEXCEPT { return __value_; } 2102 const_reference __get() const _NOEXCEPT { return __value_; } 2103 2104private: 2105 _Tp __value_; 2106}; 2107 2108template <class _Tp, int _Idx> 2109struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2110 typedef _Tp _ParamT; 2111 typedef _Tp& reference; 2112 typedef const _Tp& const_reference; 2113 typedef _Tp __value_type; 2114 2115#ifndef _LIBCPP_CXX03_LANG 2116 constexpr __compressed_pair_elem() = default; 2117 2118 template <class _Up, class = typename enable_if< 2119 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2120 >::type> 2121 constexpr explicit 2122 __compressed_pair_elem(_Up&& __u) 2123 : __value_type(_VSTD::forward<_Up>(__u)){}; 2124 2125 template <class... _Args, size_t... _Indexes> 2126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2127 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2128 __tuple_indices<_Indexes...>) 2129 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2130#else 2131 __compressed_pair_elem() : __value_type() {} 2132 __compressed_pair_elem(_ParamT __p) 2133 : __value_type(std::forward<_ParamT>(__p)) {} 2134#endif 2135 2136 reference __get() _NOEXCEPT { return *this; } 2137 const_reference __get() const _NOEXCEPT { return *this; } 2138}; 2139 2140// Tag used to construct the second element of the compressed pair. 2141struct __second_tag {}; 2142 2143template <class _T1, class _T2> 2144class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2145 private __compressed_pair_elem<_T2, 1> { 2146 typedef __compressed_pair_elem<_T1, 0> _Base1; 2147 typedef __compressed_pair_elem<_T2, 1> _Base2; 2148 2149 // NOTE: This static assert should never fire because __compressed_pair 2150 // is *almost never* used in a scenario where it's possible for T1 == T2. 2151 // (The exception is std::function where it is possible that the function 2152 // object and the allocator have the same type). 2153 static_assert((!is_same<_T1, _T2>::value), 2154 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2155 "The current implementation is NOT ABI-compatible with the previous " 2156 "implementation for this configuration"); 2157 2158public: 2159#ifndef _LIBCPP_CXX03_LANG 2160 template <bool _Dummy = true, 2161 class = typename enable_if< 2162 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2163 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2164 >::type 2165 > 2166 _LIBCPP_INLINE_VISIBILITY 2167 constexpr __compressed_pair() {} 2168 2169 template <class _Tp, typename enable_if<!is_same<typename decay<_Tp>::type, 2170 __compressed_pair>::value, 2171 bool>::type = true> 2172 _LIBCPP_INLINE_VISIBILITY constexpr explicit 2173 __compressed_pair(_Tp&& __t) 2174 : _Base1(std::forward<_Tp>(__t)), _Base2() {} 2175 2176 template <class _Tp> 2177 _LIBCPP_INLINE_VISIBILITY constexpr 2178 __compressed_pair(__second_tag, _Tp&& __t) 2179 : _Base1(), _Base2(std::forward<_Tp>(__t)) {} 2180 2181 template <class _U1, class _U2> 2182 _LIBCPP_INLINE_VISIBILITY constexpr 2183 __compressed_pair(_U1&& __t1, _U2&& __t2) 2184 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2185 2186 template <class... _Args1, class... _Args2> 2187 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2188 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 2189 tuple<_Args2...> __second_args) 2190 : _Base1(__pc, _VSTD::move(__first_args), 2191 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 2192 _Base2(__pc, _VSTD::move(__second_args), 2193 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 2194 2195#else 2196 _LIBCPP_INLINE_VISIBILITY 2197 __compressed_pair() {} 2198 2199 _LIBCPP_INLINE_VISIBILITY explicit 2200 __compressed_pair(_T1 __t1) : _Base1(_VSTD::forward<_T1>(__t1)) {} 2201 2202 _LIBCPP_INLINE_VISIBILITY 2203 __compressed_pair(__second_tag, _T2 __t2) 2204 : _Base1(), _Base2(_VSTD::forward<_T2>(__t2)) {} 2205 2206 _LIBCPP_INLINE_VISIBILITY 2207 __compressed_pair(_T1 __t1, _T2 __t2) 2208 : _Base1(_VSTD::forward<_T1>(__t1)), _Base2(_VSTD::forward<_T2>(__t2)) {} 2209#endif 2210 2211 _LIBCPP_INLINE_VISIBILITY 2212 typename _Base1::reference first() _NOEXCEPT { 2213 return static_cast<_Base1&>(*this).__get(); 2214 } 2215 2216 _LIBCPP_INLINE_VISIBILITY 2217 typename _Base1::const_reference first() const _NOEXCEPT { 2218 return static_cast<_Base1 const&>(*this).__get(); 2219 } 2220 2221 _LIBCPP_INLINE_VISIBILITY 2222 typename _Base2::reference second() _NOEXCEPT { 2223 return static_cast<_Base2&>(*this).__get(); 2224 } 2225 2226 _LIBCPP_INLINE_VISIBILITY 2227 typename _Base2::const_reference second() const _NOEXCEPT { 2228 return static_cast<_Base2 const&>(*this).__get(); 2229 } 2230 2231 _LIBCPP_INLINE_VISIBILITY 2232 void swap(__compressed_pair& __x) 2233 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2234 __is_nothrow_swappable<_T2>::value) 2235 { 2236 using std::swap; 2237 swap(first(), __x.first()); 2238 swap(second(), __x.second()); 2239 } 2240}; 2241 2242template <class _T1, class _T2> 2243inline _LIBCPP_INLINE_VISIBILITY 2244void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2245 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2246 __is_nothrow_swappable<_T2>::value) { 2247 __x.swap(__y); 2248} 2249 2250// default_delete 2251 2252template <class _Tp> 2253struct _LIBCPP_TEMPLATE_VIS default_delete { 2254#ifndef _LIBCPP_CXX03_LANG 2255 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2256#else 2257 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2258#endif 2259 template <class _Up> 2260 _LIBCPP_INLINE_VISIBILITY 2261 default_delete(const default_delete<_Up>&, 2262 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2263 0) _NOEXCEPT {} 2264 2265 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2266 static_assert(sizeof(_Tp) > 0, 2267 "default_delete can not delete incomplete type"); 2268 static_assert(!is_void<_Tp>::value, 2269 "default_delete can not delete incomplete type"); 2270 delete __ptr; 2271 } 2272}; 2273 2274template <class _Tp> 2275struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2276private: 2277 template <class _Up> 2278 struct _EnableIfConvertible 2279 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2280 2281public: 2282#ifndef _LIBCPP_CXX03_LANG 2283 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2284#else 2285 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2286#endif 2287 2288 template <class _Up> 2289 _LIBCPP_INLINE_VISIBILITY 2290 default_delete(const default_delete<_Up[]>&, 2291 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2292 2293 template <class _Up> 2294 _LIBCPP_INLINE_VISIBILITY 2295 typename _EnableIfConvertible<_Up>::type 2296 operator()(_Up* __ptr) const _NOEXCEPT { 2297 static_assert(sizeof(_Tp) > 0, 2298 "default_delete can not delete incomplete type"); 2299 static_assert(!is_void<_Tp>::value, 2300 "default_delete can not delete void type"); 2301 delete[] __ptr; 2302 } 2303}; 2304 2305 2306 2307#ifndef _LIBCPP_CXX03_LANG 2308template <class _Deleter> 2309struct __unique_ptr_deleter_sfinae { 2310 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2311 typedef const _Deleter& __lval_ref_type; 2312 typedef _Deleter&& __good_rval_ref_type; 2313 typedef true_type __enable_rval_overload; 2314}; 2315 2316template <class _Deleter> 2317struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2318 typedef const _Deleter& __lval_ref_type; 2319 typedef const _Deleter&& __bad_rval_ref_type; 2320 typedef false_type __enable_rval_overload; 2321}; 2322 2323template <class _Deleter> 2324struct __unique_ptr_deleter_sfinae<_Deleter&> { 2325 typedef _Deleter& __lval_ref_type; 2326 typedef _Deleter&& __bad_rval_ref_type; 2327 typedef false_type __enable_rval_overload; 2328}; 2329#endif // !defined(_LIBCPP_CXX03_LANG) 2330 2331template <class _Tp, class _Dp = default_delete<_Tp> > 2332class _LIBCPP_TEMPLATE_VIS unique_ptr { 2333public: 2334 typedef _Tp element_type; 2335 typedef _Dp deleter_type; 2336 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2337 2338 static_assert(!is_rvalue_reference<deleter_type>::value, 2339 "the specified deleter type cannot be an rvalue reference"); 2340 2341private: 2342 __compressed_pair<pointer, deleter_type> __ptr_; 2343 2344 struct __nat { int __for_bool_; }; 2345 2346#ifndef _LIBCPP_CXX03_LANG 2347 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2348 2349 template <bool _Dummy> 2350 using _LValRefType = 2351 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2352 2353 template <bool _Dummy> 2354 using _GoodRValRefType = 2355 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2356 2357 template <bool _Dummy> 2358 using _BadRValRefType = 2359 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2360 2361 template <bool _Dummy, class _Deleter = typename __dependent_type< 2362 __identity<deleter_type>, _Dummy>::type> 2363 using _EnableIfDeleterDefaultConstructible = 2364 typename enable_if<is_default_constructible<_Deleter>::value && 2365 !is_pointer<_Deleter>::value>::type; 2366 2367 template <class _ArgType> 2368 using _EnableIfDeleterConstructible = 2369 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2370 2371 template <class _UPtr, class _Up> 2372 using _EnableIfMoveConvertible = typename enable_if< 2373 is_convertible<typename _UPtr::pointer, pointer>::value && 2374 !is_array<_Up>::value 2375 >::type; 2376 2377 template <class _UDel> 2378 using _EnableIfDeleterConvertible = typename enable_if< 2379 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2380 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2381 >::type; 2382 2383 template <class _UDel> 2384 using _EnableIfDeleterAssignable = typename enable_if< 2385 is_assignable<_Dp&, _UDel&&>::value 2386 >::type; 2387 2388public: 2389 template <bool _Dummy = true, 2390 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2391 _LIBCPP_INLINE_VISIBILITY 2392 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2393 2394 template <bool _Dummy = true, 2395 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2396 _LIBCPP_INLINE_VISIBILITY 2397 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2398 2399 template <bool _Dummy = true, 2400 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2401 _LIBCPP_INLINE_VISIBILITY 2402 explicit unique_ptr(pointer __p) noexcept : __ptr_(__p) {} 2403 2404 template <bool _Dummy = true, 2405 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2406 _LIBCPP_INLINE_VISIBILITY 2407 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) noexcept 2408 : __ptr_(__p, __d) {} 2409 2410 template <bool _Dummy = true, 2411 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2412 _LIBCPP_INLINE_VISIBILITY 2413 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) noexcept 2414 : __ptr_(__p, _VSTD::move(__d)) { 2415 static_assert(!is_reference<deleter_type>::value, 2416 "rvalue deleter bound to reference"); 2417 } 2418 2419 template <bool _Dummy = true, 2420 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>> 2421 _LIBCPP_INLINE_VISIBILITY 2422 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2423 2424 _LIBCPP_INLINE_VISIBILITY 2425 unique_ptr(unique_ptr&& __u) noexcept 2426 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2427 } 2428 2429 template <class _Up, class _Ep, 2430 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2431 class = _EnableIfDeleterConvertible<_Ep> 2432 > 2433 _LIBCPP_INLINE_VISIBILITY 2434 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2435 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2436 2437#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2438 template <class _Up> 2439 _LIBCPP_INLINE_VISIBILITY 2440 unique_ptr(auto_ptr<_Up>&& __p, 2441 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2442 is_same<_Dp, default_delete<_Tp>>::value, 2443 __nat>::type = __nat()) _NOEXCEPT 2444 : __ptr_(__p.release()) {} 2445#endif 2446 2447 _LIBCPP_INLINE_VISIBILITY 2448 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2449 reset(__u.release()); 2450 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2451 return *this; 2452 } 2453 2454 template <class _Up, class _Ep, 2455 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2456 class = _EnableIfDeleterAssignable<_Ep> 2457 > 2458 _LIBCPP_INLINE_VISIBILITY 2459 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2460 reset(__u.release()); 2461 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2462 return *this; 2463 } 2464 2465#else // _LIBCPP_CXX03_LANG 2466private: 2467 unique_ptr(unique_ptr&); 2468 template <class _Up, class _Ep> unique_ptr(unique_ptr<_Up, _Ep>&); 2469 2470 unique_ptr& operator=(unique_ptr&); 2471 template <class _Up, class _Ep> unique_ptr& operator=(unique_ptr<_Up, _Ep>&); 2472 2473public: 2474 _LIBCPP_INLINE_VISIBILITY 2475 unique_ptr() : __ptr_(pointer()) 2476 { 2477 static_assert(!is_pointer<deleter_type>::value, 2478 "unique_ptr constructed with null function pointer deleter"); 2479 static_assert(is_default_constructible<deleter_type>::value, 2480 "unique_ptr::deleter_type is not default constructible"); 2481 } 2482 _LIBCPP_INLINE_VISIBILITY 2483 unique_ptr(nullptr_t) : __ptr_(pointer()) 2484 { 2485 static_assert(!is_pointer<deleter_type>::value, 2486 "unique_ptr constructed with null function pointer deleter"); 2487 } 2488 _LIBCPP_INLINE_VISIBILITY 2489 explicit unique_ptr(pointer __p) 2490 : __ptr_(_VSTD::move(__p)) { 2491 static_assert(!is_pointer<deleter_type>::value, 2492 "unique_ptr constructed with null function pointer deleter"); 2493 } 2494 2495 _LIBCPP_INLINE_VISIBILITY 2496 operator __rv<unique_ptr>() { 2497 return __rv<unique_ptr>(*this); 2498 } 2499 2500 _LIBCPP_INLINE_VISIBILITY 2501 unique_ptr(__rv<unique_ptr> __u) 2502 : __ptr_(__u->release(), 2503 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2504 2505 template <class _Up, class _Ep> 2506 _LIBCPP_INLINE_VISIBILITY 2507 typename enable_if< 2508 !is_array<_Up>::value && 2509 is_convertible<typename unique_ptr<_Up, _Ep>::pointer, 2510 pointer>::value && 2511 is_assignable<deleter_type&, _Ep&>::value, 2512 unique_ptr&>::type 2513 operator=(unique_ptr<_Up, _Ep> __u) { 2514 reset(__u.release()); 2515 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2516 return *this; 2517 } 2518 2519 _LIBCPP_INLINE_VISIBILITY 2520 unique_ptr(pointer __p, deleter_type __d) 2521 : __ptr_(_VSTD::move(__p), _VSTD::move(__d)) {} 2522#endif // _LIBCPP_CXX03_LANG 2523 2524#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2525 template <class _Up> 2526 _LIBCPP_INLINE_VISIBILITY 2527 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2528 is_same<_Dp, default_delete<_Tp> >::value, 2529 unique_ptr&>::type 2530 operator=(auto_ptr<_Up> __p) { 2531 reset(__p.release()); 2532 return *this; 2533 } 2534#endif 2535 2536 _LIBCPP_INLINE_VISIBILITY 2537 ~unique_ptr() { reset(); } 2538 2539 _LIBCPP_INLINE_VISIBILITY 2540 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2541 reset(); 2542 return *this; 2543 } 2544 2545 _LIBCPP_INLINE_VISIBILITY 2546 typename add_lvalue_reference<_Tp>::type 2547 operator*() const { 2548 return *__ptr_.first(); 2549 } 2550 _LIBCPP_INLINE_VISIBILITY 2551 pointer operator->() const _NOEXCEPT { 2552 return __ptr_.first(); 2553 } 2554 _LIBCPP_INLINE_VISIBILITY 2555 pointer get() const _NOEXCEPT { 2556 return __ptr_.first(); 2557 } 2558 _LIBCPP_INLINE_VISIBILITY 2559 deleter_type& get_deleter() _NOEXCEPT { 2560 return __ptr_.second(); 2561 } 2562 _LIBCPP_INLINE_VISIBILITY 2563 const deleter_type& get_deleter() const _NOEXCEPT { 2564 return __ptr_.second(); 2565 } 2566 _LIBCPP_INLINE_VISIBILITY 2567 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2568 return __ptr_.first() != nullptr; 2569 } 2570 2571 _LIBCPP_INLINE_VISIBILITY 2572 pointer release() _NOEXCEPT { 2573 pointer __t = __ptr_.first(); 2574 __ptr_.first() = pointer(); 2575 return __t; 2576 } 2577 2578 _LIBCPP_INLINE_VISIBILITY 2579 void reset(pointer __p = pointer()) _NOEXCEPT { 2580 pointer __tmp = __ptr_.first(); 2581 __ptr_.first() = __p; 2582 if (__tmp) 2583 __ptr_.second()(__tmp); 2584 } 2585 2586 _LIBCPP_INLINE_VISIBILITY 2587 void swap(unique_ptr& __u) _NOEXCEPT { 2588 __ptr_.swap(__u.__ptr_); 2589 } 2590}; 2591 2592 2593template <class _Tp, class _Dp> 2594class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2595public: 2596 typedef _Tp element_type; 2597 typedef _Dp deleter_type; 2598 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2599 2600private: 2601 __compressed_pair<pointer, deleter_type> __ptr_; 2602 2603 template <class _From> 2604 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2605 2606 template <class _FromElem> 2607 struct _CheckArrayPointerConversion<_FromElem*> 2608 : integral_constant<bool, 2609 is_same<_FromElem*, pointer>::value || 2610 (is_same<pointer, element_type*>::value && 2611 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2612 > 2613 {}; 2614 2615#ifndef _LIBCPP_CXX03_LANG 2616 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2617 2618 template <bool _Dummy> 2619 using _LValRefType = 2620 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2621 2622 template <bool _Dummy> 2623 using _GoodRValRefType = 2624 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2625 2626 template <bool _Dummy> 2627 using _BadRValRefType = 2628 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2629 2630 template <bool _Dummy, class _Deleter = typename __dependent_type< 2631 __identity<deleter_type>, _Dummy>::type> 2632 using _EnableIfDeleterDefaultConstructible = 2633 typename enable_if<is_default_constructible<_Deleter>::value && 2634 !is_pointer<_Deleter>::value>::type; 2635 2636 template <class _ArgType> 2637 using _EnableIfDeleterConstructible = 2638 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2639 2640 template <class _Pp> 2641 using _EnableIfPointerConvertible = typename enable_if< 2642 _CheckArrayPointerConversion<_Pp>::value 2643 >::type; 2644 2645 template <class _UPtr, class _Up, 2646 class _ElemT = typename _UPtr::element_type> 2647 using _EnableIfMoveConvertible = typename enable_if< 2648 is_array<_Up>::value && 2649 is_same<pointer, element_type*>::value && 2650 is_same<typename _UPtr::pointer, _ElemT*>::value && 2651 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2652 >::type; 2653 2654 template <class _UDel> 2655 using _EnableIfDeleterConvertible = typename enable_if< 2656 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2657 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2658 >::type; 2659 2660 template <class _UDel> 2661 using _EnableIfDeleterAssignable = typename enable_if< 2662 is_assignable<_Dp&, _UDel&&>::value 2663 >::type; 2664 2665public: 2666 template <bool _Dummy = true, 2667 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2668 _LIBCPP_INLINE_VISIBILITY 2669 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2670 2671 template <bool _Dummy = true, 2672 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2673 _LIBCPP_INLINE_VISIBILITY 2674 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2675 2676 template <class _Pp, bool _Dummy = true, 2677 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2678 class = _EnableIfPointerConvertible<_Pp>> 2679 _LIBCPP_INLINE_VISIBILITY 2680 explicit unique_ptr(_Pp __p) noexcept 2681 : __ptr_(__p) {} 2682 2683 template <class _Pp, bool _Dummy = true, 2684 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>, 2685 class = _EnableIfPointerConvertible<_Pp>> 2686 _LIBCPP_INLINE_VISIBILITY 2687 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) noexcept 2688 : __ptr_(__p, __d) {} 2689 2690 template <bool _Dummy = true, 2691 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2692 _LIBCPP_INLINE_VISIBILITY 2693 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) noexcept 2694 : __ptr_(nullptr, __d) {} 2695 2696 template <class _Pp, bool _Dummy = true, 2697 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>, 2698 class = _EnableIfPointerConvertible<_Pp>> 2699 _LIBCPP_INLINE_VISIBILITY 2700 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) noexcept 2701 : __ptr_(__p, _VSTD::move(__d)) { 2702 static_assert(!is_reference<deleter_type>::value, 2703 "rvalue deleter bound to reference"); 2704 } 2705 2706 template <bool _Dummy = true, 2707 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2708 _LIBCPP_INLINE_VISIBILITY 2709 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) noexcept 2710 : __ptr_(nullptr, _VSTD::move(__d)) { 2711 static_assert(!is_reference<deleter_type>::value, 2712 "rvalue deleter bound to reference"); 2713 } 2714 2715 template <class _Pp, bool _Dummy = true, 2716 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>, 2717 class = _EnableIfPointerConvertible<_Pp>> 2718 _LIBCPP_INLINE_VISIBILITY 2719 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2720 2721 _LIBCPP_INLINE_VISIBILITY 2722 unique_ptr(unique_ptr&& __u) noexcept 2723 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2724 } 2725 2726 _LIBCPP_INLINE_VISIBILITY 2727 unique_ptr& operator=(unique_ptr&& __u) noexcept { 2728 reset(__u.release()); 2729 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2730 return *this; 2731 } 2732 2733 template <class _Up, class _Ep, 2734 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2735 class = _EnableIfDeleterConvertible<_Ep> 2736 > 2737 _LIBCPP_INLINE_VISIBILITY 2738 unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept 2739 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2740 } 2741 2742 template <class _Up, class _Ep, 2743 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2744 class = _EnableIfDeleterAssignable<_Ep> 2745 > 2746 _LIBCPP_INLINE_VISIBILITY 2747 unique_ptr& 2748 operator=(unique_ptr<_Up, _Ep>&& __u) noexcept { 2749 reset(__u.release()); 2750 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2751 return *this; 2752 } 2753 2754#else // _LIBCPP_CXX03_LANG 2755private: 2756 template <class _Up> explicit unique_ptr(_Up); 2757 2758 unique_ptr(unique_ptr&); 2759 template <class _Up> unique_ptr(unique_ptr<_Up>&); 2760 2761 unique_ptr& operator=(unique_ptr&); 2762 template <class _Up> unique_ptr& operator=(unique_ptr<_Up>&); 2763 2764 template <class _Up> 2765 unique_ptr(_Up __u, 2766 typename conditional< 2767 is_reference<deleter_type>::value, deleter_type, 2768 typename add_lvalue_reference<const deleter_type>::type>::type, 2769 typename enable_if<is_convertible<_Up, pointer>::value, 2770 __nat>::type = __nat()); 2771public: 2772 _LIBCPP_INLINE_VISIBILITY 2773 unique_ptr() : __ptr_(pointer()) { 2774 static_assert(!is_pointer<deleter_type>::value, 2775 "unique_ptr constructed with null function pointer deleter"); 2776 } 2777 _LIBCPP_INLINE_VISIBILITY 2778 unique_ptr(nullptr_t) : __ptr_(pointer()) { 2779 static_assert(!is_pointer<deleter_type>::value, 2780 "unique_ptr constructed with null function pointer deleter"); 2781 } 2782 2783 _LIBCPP_INLINE_VISIBILITY 2784 explicit unique_ptr(pointer __p) : __ptr_(__p) { 2785 static_assert(!is_pointer<deleter_type>::value, 2786 "unique_ptr constructed with null function pointer deleter"); 2787 } 2788 2789 _LIBCPP_INLINE_VISIBILITY 2790 unique_ptr(pointer __p, deleter_type __d) 2791 : __ptr_(__p, _VSTD::forward<deleter_type>(__d)) {} 2792 2793 _LIBCPP_INLINE_VISIBILITY 2794 unique_ptr(nullptr_t, deleter_type __d) 2795 : __ptr_(pointer(), _VSTD::forward<deleter_type>(__d)) {} 2796 2797 _LIBCPP_INLINE_VISIBILITY 2798 operator __rv<unique_ptr>() { 2799 return __rv<unique_ptr>(*this); 2800 } 2801 2802 _LIBCPP_INLINE_VISIBILITY 2803 unique_ptr(__rv<unique_ptr> __u) 2804 : __ptr_(__u->release(), 2805 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2806 2807 _LIBCPP_INLINE_VISIBILITY 2808 unique_ptr& operator=(__rv<unique_ptr> __u) { 2809 reset(__u->release()); 2810 __ptr_.second() = _VSTD::forward<deleter_type>(__u->get_deleter()); 2811 return *this; 2812 } 2813 2814#endif // _LIBCPP_CXX03_LANG 2815 2816public: 2817 _LIBCPP_INLINE_VISIBILITY 2818 ~unique_ptr() { reset(); } 2819 2820 _LIBCPP_INLINE_VISIBILITY 2821 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2822 reset(); 2823 return *this; 2824 } 2825 2826 _LIBCPP_INLINE_VISIBILITY 2827 typename add_lvalue_reference<_Tp>::type 2828 operator[](size_t __i) const { 2829 return __ptr_.first()[__i]; 2830 } 2831 _LIBCPP_INLINE_VISIBILITY 2832 pointer get() const _NOEXCEPT { 2833 return __ptr_.first(); 2834 } 2835 2836 _LIBCPP_INLINE_VISIBILITY 2837 deleter_type& get_deleter() _NOEXCEPT { 2838 return __ptr_.second(); 2839 } 2840 2841 _LIBCPP_INLINE_VISIBILITY 2842 const deleter_type& get_deleter() const _NOEXCEPT { 2843 return __ptr_.second(); 2844 } 2845 _LIBCPP_INLINE_VISIBILITY 2846 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2847 return __ptr_.first() != nullptr; 2848 } 2849 2850 _LIBCPP_INLINE_VISIBILITY 2851 pointer release() _NOEXCEPT { 2852 pointer __t = __ptr_.first(); 2853 __ptr_.first() = pointer(); 2854 return __t; 2855 } 2856 2857 template <class _Pp> 2858 _LIBCPP_INLINE_VISIBILITY 2859 typename enable_if< 2860 _CheckArrayPointerConversion<_Pp>::value 2861 >::type 2862 reset(_Pp __p) _NOEXCEPT { 2863 pointer __tmp = __ptr_.first(); 2864 __ptr_.first() = __p; 2865 if (__tmp) 2866 __ptr_.second()(__tmp); 2867 } 2868 2869 _LIBCPP_INLINE_VISIBILITY 2870 void reset(nullptr_t = nullptr) _NOEXCEPT { 2871 pointer __tmp = __ptr_.first(); 2872 __ptr_.first() = nullptr; 2873 if (__tmp) 2874 __ptr_.second()(__tmp); 2875 } 2876 2877 _LIBCPP_INLINE_VISIBILITY 2878 void swap(unique_ptr& __u) _NOEXCEPT { 2879 __ptr_.swap(__u.__ptr_); 2880 } 2881 2882}; 2883 2884template <class _Tp, class _Dp> 2885inline _LIBCPP_INLINE_VISIBILITY 2886typename enable_if< 2887 __is_swappable<_Dp>::value, 2888 void 2889>::type 2890swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2891 2892template <class _T1, class _D1, class _T2, class _D2> 2893inline _LIBCPP_INLINE_VISIBILITY 2894bool 2895operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2896 2897template <class _T1, class _D1, class _T2, class _D2> 2898inline _LIBCPP_INLINE_VISIBILITY 2899bool 2900operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2901 2902template <class _T1, class _D1, class _T2, class _D2> 2903inline _LIBCPP_INLINE_VISIBILITY 2904bool 2905operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2906{ 2907 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2908 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2909 typedef typename common_type<_P1, _P2>::type _Vp; 2910 return less<_Vp>()(__x.get(), __y.get()); 2911} 2912 2913template <class _T1, class _D1, class _T2, class _D2> 2914inline _LIBCPP_INLINE_VISIBILITY 2915bool 2916operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2917 2918template <class _T1, class _D1, class _T2, class _D2> 2919inline _LIBCPP_INLINE_VISIBILITY 2920bool 2921operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2922 2923template <class _T1, class _D1, class _T2, class _D2> 2924inline _LIBCPP_INLINE_VISIBILITY 2925bool 2926operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2927 2928template <class _T1, class _D1> 2929inline _LIBCPP_INLINE_VISIBILITY 2930bool 2931operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2932{ 2933 return !__x; 2934} 2935 2936template <class _T1, class _D1> 2937inline _LIBCPP_INLINE_VISIBILITY 2938bool 2939operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2940{ 2941 return !__x; 2942} 2943 2944template <class _T1, class _D1> 2945inline _LIBCPP_INLINE_VISIBILITY 2946bool 2947operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2948{ 2949 return static_cast<bool>(__x); 2950} 2951 2952template <class _T1, class _D1> 2953inline _LIBCPP_INLINE_VISIBILITY 2954bool 2955operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2956{ 2957 return static_cast<bool>(__x); 2958} 2959 2960template <class _T1, class _D1> 2961inline _LIBCPP_INLINE_VISIBILITY 2962bool 2963operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2964{ 2965 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2966 return less<_P1>()(__x.get(), nullptr); 2967} 2968 2969template <class _T1, class _D1> 2970inline _LIBCPP_INLINE_VISIBILITY 2971bool 2972operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2973{ 2974 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2975 return less<_P1>()(nullptr, __x.get()); 2976} 2977 2978template <class _T1, class _D1> 2979inline _LIBCPP_INLINE_VISIBILITY 2980bool 2981operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2982{ 2983 return nullptr < __x; 2984} 2985 2986template <class _T1, class _D1> 2987inline _LIBCPP_INLINE_VISIBILITY 2988bool 2989operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2990{ 2991 return __x < nullptr; 2992} 2993 2994template <class _T1, class _D1> 2995inline _LIBCPP_INLINE_VISIBILITY 2996bool 2997operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2998{ 2999 return !(nullptr < __x); 3000} 3001 3002template <class _T1, class _D1> 3003inline _LIBCPP_INLINE_VISIBILITY 3004bool 3005operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3006{ 3007 return !(__x < nullptr); 3008} 3009 3010template <class _T1, class _D1> 3011inline _LIBCPP_INLINE_VISIBILITY 3012bool 3013operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3014{ 3015 return !(__x < nullptr); 3016} 3017 3018template <class _T1, class _D1> 3019inline _LIBCPP_INLINE_VISIBILITY 3020bool 3021operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3022{ 3023 return !(nullptr < __x); 3024} 3025 3026#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3027 3028template <class _Tp, class _Dp> 3029inline _LIBCPP_INLINE_VISIBILITY 3030unique_ptr<_Tp, _Dp> 3031move(unique_ptr<_Tp, _Dp>& __t) 3032{ 3033 return unique_ptr<_Tp, _Dp>(__rv<unique_ptr<_Tp, _Dp> >(__t)); 3034} 3035 3036#endif 3037 3038#if _LIBCPP_STD_VER > 11 3039 3040template<class _Tp> 3041struct __unique_if 3042{ 3043 typedef unique_ptr<_Tp> __unique_single; 3044}; 3045 3046template<class _Tp> 3047struct __unique_if<_Tp[]> 3048{ 3049 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 3050}; 3051 3052template<class _Tp, size_t _Np> 3053struct __unique_if<_Tp[_Np]> 3054{ 3055 typedef void __unique_array_known_bound; 3056}; 3057 3058template<class _Tp, class... _Args> 3059inline _LIBCPP_INLINE_VISIBILITY 3060typename __unique_if<_Tp>::__unique_single 3061make_unique(_Args&&... __args) 3062{ 3063 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 3064} 3065 3066template<class _Tp> 3067inline _LIBCPP_INLINE_VISIBILITY 3068typename __unique_if<_Tp>::__unique_array_unknown_bound 3069make_unique(size_t __n) 3070{ 3071 typedef typename remove_extent<_Tp>::type _Up; 3072 return unique_ptr<_Tp>(new _Up[__n]()); 3073} 3074 3075template<class _Tp, class... _Args> 3076 typename __unique_if<_Tp>::__unique_array_known_bound 3077 make_unique(_Args&&...) = delete; 3078 3079#endif // _LIBCPP_STD_VER > 11 3080 3081template <class _Tp, class _Dp> 3082#ifdef _LIBCPP_CXX03_LANG 3083struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 3084#else 3085struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 3086 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer>> 3087#endif 3088{ 3089 typedef unique_ptr<_Tp, _Dp> argument_type; 3090 typedef size_t result_type; 3091 _LIBCPP_INLINE_VISIBILITY 3092 result_type operator()(const argument_type& __ptr) const 3093 { 3094 typedef typename argument_type::pointer pointer; 3095 return hash<pointer>()(__ptr.get()); 3096 } 3097}; 3098 3099struct __destruct_n 3100{ 3101private: 3102 size_t size; 3103 3104 template <class _Tp> 3105 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 3106 {for (size_t __i = 0; __i < size; ++__i, ++__p) __p->~_Tp();} 3107 3108 template <class _Tp> 3109 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 3110 {} 3111 3112 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 3113 {++size;} 3114 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 3115 {} 3116 3117 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 3118 {size = __s;} 3119 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 3120 {} 3121public: 3122 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 3123 : size(__s) {} 3124 3125 template <class _Tp> 3126 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 3127 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3128 3129 template <class _Tp> 3130 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 3131 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3132 3133 template <class _Tp> 3134 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 3135 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3136}; 3137 3138template <class _Alloc> 3139class __allocator_destructor 3140{ 3141 typedef allocator_traits<_Alloc> __alloc_traits; 3142public: 3143 typedef typename __alloc_traits::pointer pointer; 3144 typedef typename __alloc_traits::size_type size_type; 3145private: 3146 _Alloc& __alloc_; 3147 size_type __s_; 3148public: 3149 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3150 _NOEXCEPT 3151 : __alloc_(__a), __s_(__s) {} 3152 _LIBCPP_INLINE_VISIBILITY 3153 void operator()(pointer __p) _NOEXCEPT 3154 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3155}; 3156 3157template <class _InputIterator, class _ForwardIterator> 3158_ForwardIterator 3159uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3160{ 3161 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3162#ifndef _LIBCPP_NO_EXCEPTIONS 3163 _ForwardIterator __s = __r; 3164 try 3165 { 3166#endif 3167 for (; __f != __l; ++__f, (void) ++__r) 3168 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3169#ifndef _LIBCPP_NO_EXCEPTIONS 3170 } 3171 catch (...) 3172 { 3173 for (; __s != __r; ++__s) 3174 __s->~value_type(); 3175 throw; 3176 } 3177#endif 3178 return __r; 3179} 3180 3181template <class _InputIterator, class _Size, class _ForwardIterator> 3182_ForwardIterator 3183uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3184{ 3185 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3186#ifndef _LIBCPP_NO_EXCEPTIONS 3187 _ForwardIterator __s = __r; 3188 try 3189 { 3190#endif 3191 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3192 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3193#ifndef _LIBCPP_NO_EXCEPTIONS 3194 } 3195 catch (...) 3196 { 3197 for (; __s != __r; ++__s) 3198 __s->~value_type(); 3199 throw; 3200 } 3201#endif 3202 return __r; 3203} 3204 3205template <class _ForwardIterator, class _Tp> 3206void 3207uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3208{ 3209 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3210#ifndef _LIBCPP_NO_EXCEPTIONS 3211 _ForwardIterator __s = __f; 3212 try 3213 { 3214#endif 3215 for (; __f != __l; ++__f) 3216 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3217#ifndef _LIBCPP_NO_EXCEPTIONS 3218 } 3219 catch (...) 3220 { 3221 for (; __s != __f; ++__s) 3222 __s->~value_type(); 3223 throw; 3224 } 3225#endif 3226} 3227 3228template <class _ForwardIterator, class _Size, class _Tp> 3229_ForwardIterator 3230uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3231{ 3232 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3233#ifndef _LIBCPP_NO_EXCEPTIONS 3234 _ForwardIterator __s = __f; 3235 try 3236 { 3237#endif 3238 for (; __n > 0; ++__f, (void) --__n) 3239 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3240#ifndef _LIBCPP_NO_EXCEPTIONS 3241 } 3242 catch (...) 3243 { 3244 for (; __s != __f; ++__s) 3245 __s->~value_type(); 3246 throw; 3247 } 3248#endif 3249 return __f; 3250} 3251 3252#if _LIBCPP_STD_VER > 14 3253 3254template <class _Tp> 3255inline _LIBCPP_INLINE_VISIBILITY 3256void destroy_at(_Tp* __loc) { 3257 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3258 __loc->~_Tp(); 3259} 3260 3261template <class _ForwardIterator> 3262inline _LIBCPP_INLINE_VISIBILITY 3263void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3264 for (; __first != __last; ++__first) 3265 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3266} 3267 3268template <class _ForwardIterator, class _Size> 3269inline _LIBCPP_INLINE_VISIBILITY 3270_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3271 for (; __n > 0; (void)++__first, --__n) 3272 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3273 return __first; 3274} 3275 3276template <class _ForwardIterator> 3277inline _LIBCPP_INLINE_VISIBILITY 3278void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3279 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3280 auto __idx = __first; 3281#ifndef _LIBCPP_NO_EXCEPTIONS 3282 try { 3283#endif 3284 for (; __idx != __last; ++__idx) 3285 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3286#ifndef _LIBCPP_NO_EXCEPTIONS 3287 } catch (...) { 3288 _VSTD::destroy(__first, __idx); 3289 throw; 3290 } 3291#endif 3292} 3293 3294template <class _ForwardIterator, class _Size> 3295inline _LIBCPP_INLINE_VISIBILITY 3296_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3297 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3298 auto __idx = __first; 3299#ifndef _LIBCPP_NO_EXCEPTIONS 3300 try { 3301#endif 3302 for (; __n > 0; (void)++__idx, --__n) 3303 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3304 return __idx; 3305#ifndef _LIBCPP_NO_EXCEPTIONS 3306 } catch (...) { 3307 _VSTD::destroy(__first, __idx); 3308 throw; 3309 } 3310#endif 3311} 3312 3313 3314template <class _ForwardIterator> 3315inline _LIBCPP_INLINE_VISIBILITY 3316void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3317 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3318 auto __idx = __first; 3319#ifndef _LIBCPP_NO_EXCEPTIONS 3320 try { 3321#endif 3322 for (; __idx != __last; ++__idx) 3323 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3324#ifndef _LIBCPP_NO_EXCEPTIONS 3325 } catch (...) { 3326 _VSTD::destroy(__first, __idx); 3327 throw; 3328 } 3329#endif 3330} 3331 3332template <class _ForwardIterator, class _Size> 3333inline _LIBCPP_INLINE_VISIBILITY 3334_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3335 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3336 auto __idx = __first; 3337#ifndef _LIBCPP_NO_EXCEPTIONS 3338 try { 3339#endif 3340 for (; __n > 0; (void)++__idx, --__n) 3341 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3342 return __idx; 3343#ifndef _LIBCPP_NO_EXCEPTIONS 3344 } catch (...) { 3345 _VSTD::destroy(__first, __idx); 3346 throw; 3347 } 3348#endif 3349} 3350 3351 3352template <class _InputIt, class _ForwardIt> 3353inline _LIBCPP_INLINE_VISIBILITY 3354_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3355 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3356 auto __idx = __first_res; 3357#ifndef _LIBCPP_NO_EXCEPTIONS 3358 try { 3359#endif 3360 for (; __first != __last; (void)++__idx, ++__first) 3361 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3362 return __idx; 3363#ifndef _LIBCPP_NO_EXCEPTIONS 3364 } catch (...) { 3365 _VSTD::destroy(__first_res, __idx); 3366 throw; 3367 } 3368#endif 3369} 3370 3371template <class _InputIt, class _Size, class _ForwardIt> 3372inline _LIBCPP_INLINE_VISIBILITY 3373pair<_InputIt, _ForwardIt> 3374uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3375 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3376 auto __idx = __first_res; 3377#ifndef _LIBCPP_NO_EXCEPTIONS 3378 try { 3379#endif 3380 for (; __n > 0; ++__idx, (void)++__first, --__n) 3381 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3382 return {__first, __idx}; 3383#ifndef _LIBCPP_NO_EXCEPTIONS 3384 } catch (...) { 3385 _VSTD::destroy(__first_res, __idx); 3386 throw; 3387 } 3388#endif 3389} 3390 3391 3392#endif // _LIBCPP_STD_VER > 14 3393 3394// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3395// should be sufficient for thread safety. 3396// See https://bugs.llvm.org/show_bug.cgi?id=22803 3397#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3398 && defined(__ATOMIC_RELAXED) \ 3399 && defined(__ATOMIC_ACQ_REL) 3400# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3401#elif !defined(__clang__) && defined(_GNUC_VER) && _GNUC_VER >= 407 3402# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3403#endif 3404 3405template <class _Tp> 3406inline _LIBCPP_INLINE_VISIBILITY _Tp 3407__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3408{ 3409#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3410 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3411#else 3412 return __t += 1; 3413#endif 3414} 3415 3416template <class _Tp> 3417inline _LIBCPP_INLINE_VISIBILITY _Tp 3418__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3419{ 3420#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3421 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3422#else 3423 return __t -= 1; 3424#endif 3425} 3426 3427class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3428 : public std::exception 3429{ 3430public: 3431 virtual ~bad_weak_ptr() _NOEXCEPT; 3432 virtual const char* what() const _NOEXCEPT; 3433}; 3434 3435_LIBCPP_NORETURN inline _LIBCPP_ALWAYS_INLINE 3436void __throw_bad_weak_ptr() 3437{ 3438#ifndef _LIBCPP_NO_EXCEPTIONS 3439 throw bad_weak_ptr(); 3440#else 3441 _VSTD::abort(); 3442#endif 3443} 3444 3445template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3446 3447class _LIBCPP_TYPE_VIS __shared_count 3448{ 3449 __shared_count(const __shared_count&); 3450 __shared_count& operator=(const __shared_count&); 3451 3452protected: 3453 long __shared_owners_; 3454 virtual ~__shared_count(); 3455private: 3456 virtual void __on_zero_shared() _NOEXCEPT = 0; 3457 3458public: 3459 _LIBCPP_INLINE_VISIBILITY 3460 explicit __shared_count(long __refs = 0) _NOEXCEPT 3461 : __shared_owners_(__refs) {} 3462 3463#if defined(_LIBCPP_BUILDING_MEMORY) && \ 3464 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3465 void __add_shared() _NOEXCEPT; 3466 bool __release_shared() _NOEXCEPT; 3467#else 3468 _LIBCPP_INLINE_VISIBILITY 3469 void __add_shared() _NOEXCEPT { 3470 __libcpp_atomic_refcount_increment(__shared_owners_); 3471 } 3472 _LIBCPP_INLINE_VISIBILITY 3473 bool __release_shared() _NOEXCEPT { 3474 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3475 __on_zero_shared(); 3476 return true; 3477 } 3478 return false; 3479 } 3480#endif 3481 _LIBCPP_INLINE_VISIBILITY 3482 long use_count() const _NOEXCEPT { 3483 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3484 } 3485}; 3486 3487class _LIBCPP_TYPE_VIS __shared_weak_count 3488 : private __shared_count 3489{ 3490 long __shared_weak_owners_; 3491 3492public: 3493 _LIBCPP_INLINE_VISIBILITY 3494 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3495 : __shared_count(__refs), 3496 __shared_weak_owners_(__refs) {} 3497protected: 3498 virtual ~__shared_weak_count(); 3499 3500public: 3501#if defined(_LIBCPP_BUILDING_MEMORY) && \ 3502 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3503 void __add_shared() _NOEXCEPT; 3504 void __add_weak() _NOEXCEPT; 3505 void __release_shared() _NOEXCEPT; 3506#else 3507 _LIBCPP_INLINE_VISIBILITY 3508 void __add_shared() _NOEXCEPT { 3509 __shared_count::__add_shared(); 3510 } 3511 _LIBCPP_INLINE_VISIBILITY 3512 void __add_weak() _NOEXCEPT { 3513 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3514 } 3515 _LIBCPP_INLINE_VISIBILITY 3516 void __release_shared() _NOEXCEPT { 3517 if (__shared_count::__release_shared()) 3518 __release_weak(); 3519 } 3520#endif 3521 void __release_weak() _NOEXCEPT; 3522 _LIBCPP_INLINE_VISIBILITY 3523 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3524 __shared_weak_count* lock() _NOEXCEPT; 3525 3526 // Define the function out only if we build static libc++ without RTTI. 3527 // Otherwise we may break clients who need to compile their projects with 3528 // -fno-rtti and yet link against a libc++.dylib compiled 3529 // without -fno-rtti. 3530#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3531 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3532#endif 3533private: 3534 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3535}; 3536 3537template <class _Tp, class _Dp, class _Alloc> 3538class __shared_ptr_pointer 3539 : public __shared_weak_count 3540{ 3541 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3542public: 3543 _LIBCPP_INLINE_VISIBILITY 3544 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3545 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3546 3547#ifndef _LIBCPP_NO_RTTI 3548 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3549#endif 3550 3551private: 3552 virtual void __on_zero_shared() _NOEXCEPT; 3553 virtual void __on_zero_shared_weak() _NOEXCEPT; 3554}; 3555 3556#ifndef _LIBCPP_NO_RTTI 3557 3558template <class _Tp, class _Dp, class _Alloc> 3559const void* 3560__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3561{ 3562 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3563} 3564 3565#endif // _LIBCPP_NO_RTTI 3566 3567template <class _Tp, class _Dp, class _Alloc> 3568void 3569__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3570{ 3571 __data_.first().second()(__data_.first().first()); 3572 __data_.first().second().~_Dp(); 3573} 3574 3575template <class _Tp, class _Dp, class _Alloc> 3576void 3577__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3578{ 3579 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3580 typedef allocator_traits<_Al> _ATraits; 3581 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3582 3583 _Al __a(__data_.second()); 3584 __data_.second().~_Alloc(); 3585 __a.deallocate(_PTraits::pointer_to(*this), 1); 3586} 3587 3588template <class _Tp, class _Alloc> 3589class __shared_ptr_emplace 3590 : public __shared_weak_count 3591{ 3592 __compressed_pair<_Alloc, _Tp> __data_; 3593public: 3594#ifndef _LIBCPP_HAS_NO_VARIADICS 3595 3596 _LIBCPP_INLINE_VISIBILITY 3597 __shared_ptr_emplace(_Alloc __a) 3598 : __data_(_VSTD::move(__a)) {} 3599 3600 template <class ..._Args> 3601 _LIBCPP_INLINE_VISIBILITY 3602 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3603 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3604 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3605 3606#else // _LIBCPP_HAS_NO_VARIADICS 3607 3608 _LIBCPP_INLINE_VISIBILITY 3609 __shared_ptr_emplace(_Alloc __a) 3610 : __data_(__a) {} 3611 3612 template <class _A0> 3613 _LIBCPP_INLINE_VISIBILITY 3614 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3615 : __data_(__a, _Tp(__a0)) {} 3616 3617 template <class _A0, class _A1> 3618 _LIBCPP_INLINE_VISIBILITY 3619 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3620 : __data_(__a, _Tp(__a0, __a1)) {} 3621 3622 template <class _A0, class _A1, class _A2> 3623 _LIBCPP_INLINE_VISIBILITY 3624 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3625 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3626 3627#endif // _LIBCPP_HAS_NO_VARIADICS 3628 3629private: 3630 virtual void __on_zero_shared() _NOEXCEPT; 3631 virtual void __on_zero_shared_weak() _NOEXCEPT; 3632public: 3633 _LIBCPP_INLINE_VISIBILITY 3634 _Tp* get() _NOEXCEPT {return &__data_.second();} 3635}; 3636 3637template <class _Tp, class _Alloc> 3638void 3639__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3640{ 3641 __data_.second().~_Tp(); 3642} 3643 3644template <class _Tp, class _Alloc> 3645void 3646__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3647{ 3648 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3649 typedef allocator_traits<_Al> _ATraits; 3650 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3651 _Al __a(__data_.first()); 3652 __data_.first().~_Alloc(); 3653 __a.deallocate(_PTraits::pointer_to(*this), 1); 3654} 3655 3656template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3657 3658template<class _Tp> 3659class _LIBCPP_TEMPLATE_VIS shared_ptr 3660{ 3661public: 3662 typedef _Tp element_type; 3663 3664#if _LIBCPP_STD_VER > 14 3665 typedef weak_ptr<_Tp> weak_type; 3666#endif 3667private: 3668 element_type* __ptr_; 3669 __shared_weak_count* __cntrl_; 3670 3671 struct __nat {int __for_bool_;}; 3672public: 3673 _LIBCPP_INLINE_VISIBILITY 3674 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3675 _LIBCPP_INLINE_VISIBILITY 3676 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3677 template<class _Yp> 3678 explicit shared_ptr(_Yp* __p, 3679 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3680 template<class _Yp, class _Dp> 3681 shared_ptr(_Yp* __p, _Dp __d, 3682 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3683 template<class _Yp, class _Dp, class _Alloc> 3684 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3685 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3686 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3687 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3688 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3689 _LIBCPP_INLINE_VISIBILITY 3690 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3691 template<class _Yp> 3692 _LIBCPP_INLINE_VISIBILITY 3693 shared_ptr(const shared_ptr<_Yp>& __r, 3694 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3695 _NOEXCEPT; 3696#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3697 _LIBCPP_INLINE_VISIBILITY 3698 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3699 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3700 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3701 _NOEXCEPT; 3702#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3703 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3704 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3705#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3706#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3707 template<class _Yp> 3708 shared_ptr(auto_ptr<_Yp>&& __r, 3709 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3710#else 3711 template<class _Yp> 3712 shared_ptr(auto_ptr<_Yp> __r, 3713 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3714#endif 3715#endif 3716#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3717 template <class _Yp, class _Dp> 3718 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3719 typename enable_if 3720 < 3721 !is_lvalue_reference<_Dp>::value && 3722 !is_array<_Yp>::value && 3723 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3724 __nat 3725 >::type = __nat()); 3726 template <class _Yp, class _Dp> 3727 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3728 typename enable_if 3729 < 3730 is_lvalue_reference<_Dp>::value && 3731 !is_array<_Yp>::value && 3732 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3733 __nat 3734 >::type = __nat()); 3735#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3736 template <class _Yp, class _Dp> 3737 shared_ptr(unique_ptr<_Yp, _Dp>, 3738 typename enable_if 3739 < 3740 !is_lvalue_reference<_Dp>::value && 3741 !is_array<_Yp>::value && 3742 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3743 __nat 3744 >::type = __nat()); 3745 template <class _Yp, class _Dp> 3746 shared_ptr(unique_ptr<_Yp, _Dp>, 3747 typename enable_if 3748 < 3749 is_lvalue_reference<_Dp>::value && 3750 !is_array<_Yp>::value && 3751 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3752 __nat 3753 >::type = __nat()); 3754#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3755 3756 ~shared_ptr(); 3757 3758 _LIBCPP_INLINE_VISIBILITY 3759 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3760 template<class _Yp> 3761 typename enable_if 3762 < 3763 is_convertible<_Yp*, element_type*>::value, 3764 shared_ptr& 3765 >::type 3766 _LIBCPP_INLINE_VISIBILITY 3767 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3768#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3769 _LIBCPP_INLINE_VISIBILITY 3770 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3771 template<class _Yp> 3772 typename enable_if 3773 < 3774 is_convertible<_Yp*, element_type*>::value, 3775 shared_ptr<_Tp>& 3776 >::type 3777 _LIBCPP_INLINE_VISIBILITY 3778 operator=(shared_ptr<_Yp>&& __r); 3779#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3780 template<class _Yp> 3781 _LIBCPP_INLINE_VISIBILITY 3782 typename enable_if 3783 < 3784 !is_array<_Yp>::value && 3785 is_convertible<_Yp*, element_type*>::value, 3786 shared_ptr 3787 >::type& 3788 operator=(auto_ptr<_Yp>&& __r); 3789#endif 3790#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3791#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3792 template<class _Yp> 3793 _LIBCPP_INLINE_VISIBILITY 3794 typename enable_if 3795 < 3796 !is_array<_Yp>::value && 3797 is_convertible<_Yp*, element_type*>::value, 3798 shared_ptr& 3799 >::type 3800 operator=(auto_ptr<_Yp> __r); 3801#endif 3802#endif 3803 template <class _Yp, class _Dp> 3804 typename enable_if 3805 < 3806 !is_array<_Yp>::value && 3807 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3808 shared_ptr& 3809 >::type 3810#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3811 _LIBCPP_INLINE_VISIBILITY 3812 operator=(unique_ptr<_Yp, _Dp>&& __r); 3813#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3814 _LIBCPP_INLINE_VISIBILITY 3815 operator=(unique_ptr<_Yp, _Dp> __r); 3816#endif 3817 3818 _LIBCPP_INLINE_VISIBILITY 3819 void swap(shared_ptr& __r) _NOEXCEPT; 3820 _LIBCPP_INLINE_VISIBILITY 3821 void reset() _NOEXCEPT; 3822 template<class _Yp> 3823 typename enable_if 3824 < 3825 is_convertible<_Yp*, element_type*>::value, 3826 void 3827 >::type 3828 _LIBCPP_INLINE_VISIBILITY 3829 reset(_Yp* __p); 3830 template<class _Yp, class _Dp> 3831 typename enable_if 3832 < 3833 is_convertible<_Yp*, element_type*>::value, 3834 void 3835 >::type 3836 _LIBCPP_INLINE_VISIBILITY 3837 reset(_Yp* __p, _Dp __d); 3838 template<class _Yp, class _Dp, class _Alloc> 3839 typename enable_if 3840 < 3841 is_convertible<_Yp*, element_type*>::value, 3842 void 3843 >::type 3844 _LIBCPP_INLINE_VISIBILITY 3845 reset(_Yp* __p, _Dp __d, _Alloc __a); 3846 3847 _LIBCPP_INLINE_VISIBILITY 3848 element_type* get() const _NOEXCEPT {return __ptr_;} 3849 _LIBCPP_INLINE_VISIBILITY 3850 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3851 {return *__ptr_;} 3852 _LIBCPP_INLINE_VISIBILITY 3853 element_type* operator->() const _NOEXCEPT {return __ptr_;} 3854 _LIBCPP_INLINE_VISIBILITY 3855 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3856 _LIBCPP_INLINE_VISIBILITY 3857 bool unique() const _NOEXCEPT {return use_count() == 1;} 3858 _LIBCPP_INLINE_VISIBILITY 3859 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3860 template <class _Up> 3861 _LIBCPP_INLINE_VISIBILITY 3862 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3863 {return __cntrl_ < __p.__cntrl_;} 3864 template <class _Up> 3865 _LIBCPP_INLINE_VISIBILITY 3866 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3867 {return __cntrl_ < __p.__cntrl_;} 3868 _LIBCPP_INLINE_VISIBILITY 3869 bool 3870 __owner_equivalent(const shared_ptr& __p) const 3871 {return __cntrl_ == __p.__cntrl_;} 3872 3873#ifndef _LIBCPP_NO_RTTI 3874 template <class _Dp> 3875 _LIBCPP_INLINE_VISIBILITY 3876 _Dp* __get_deleter() const _NOEXCEPT 3877 {return (_Dp*)(__cntrl_ ? __cntrl_->__get_deleter(typeid(_Dp)) : 0);} 3878#endif // _LIBCPP_NO_RTTI 3879 3880#ifndef _LIBCPP_HAS_NO_VARIADICS 3881 3882 template<class ..._Args> 3883 static 3884 shared_ptr<_Tp> 3885 make_shared(_Args&& ...__args); 3886 3887 template<class _Alloc, class ..._Args> 3888 static 3889 shared_ptr<_Tp> 3890 allocate_shared(const _Alloc& __a, _Args&& ...__args); 3891 3892#else // _LIBCPP_HAS_NO_VARIADICS 3893 3894 static shared_ptr<_Tp> make_shared(); 3895 3896 template<class _A0> 3897 static shared_ptr<_Tp> make_shared(_A0&); 3898 3899 template<class _A0, class _A1> 3900 static shared_ptr<_Tp> make_shared(_A0&, _A1&); 3901 3902 template<class _A0, class _A1, class _A2> 3903 static shared_ptr<_Tp> make_shared(_A0&, _A1&, _A2&); 3904 3905 template<class _Alloc> 3906 static shared_ptr<_Tp> 3907 allocate_shared(const _Alloc& __a); 3908 3909 template<class _Alloc, class _A0> 3910 static shared_ptr<_Tp> 3911 allocate_shared(const _Alloc& __a, _A0& __a0); 3912 3913 template<class _Alloc, class _A0, class _A1> 3914 static shared_ptr<_Tp> 3915 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1); 3916 3917 template<class _Alloc, class _A0, class _A1, class _A2> 3918 static shared_ptr<_Tp> 3919 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2); 3920 3921#endif // _LIBCPP_HAS_NO_VARIADICS 3922 3923private: 3924 3925 template <class _Yp, class _OrigPtr> 3926 _LIBCPP_INLINE_VISIBILITY 3927 typename enable_if<is_convertible<_OrigPtr*, 3928 const enable_shared_from_this<_Yp>* 3929 >::value, 3930 void>::type 3931 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3932 _OrigPtr* __ptr) _NOEXCEPT 3933 { 3934 typedef typename remove_cv<_Yp>::type _RawYp; 3935 if (__e && __e->__weak_this_.expired()) 3936 { 3937 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3938 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3939 } 3940 } 3941 3942 _LIBCPP_INLINE_VISIBILITY 3943 void __enable_weak_this(const volatile void*, const volatile void*) _NOEXCEPT {} 3944 3945 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3946 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3947}; 3948 3949 3950template<class _Tp> 3951inline 3952_LIBCPP_CONSTEXPR 3953shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3954 : __ptr_(0), 3955 __cntrl_(0) 3956{ 3957} 3958 3959template<class _Tp> 3960inline 3961_LIBCPP_CONSTEXPR 3962shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3963 : __ptr_(0), 3964 __cntrl_(0) 3965{ 3966} 3967 3968template<class _Tp> 3969template<class _Yp> 3970shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3971 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3972 : __ptr_(__p) 3973{ 3974 unique_ptr<_Yp> __hold(__p); 3975 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 3976 __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), allocator<_Yp>()); 3977 __hold.release(); 3978 __enable_weak_this(__p, __p); 3979} 3980 3981template<class _Tp> 3982template<class _Yp, class _Dp> 3983shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 3984 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3985 : __ptr_(__p) 3986{ 3987#ifndef _LIBCPP_NO_EXCEPTIONS 3988 try 3989 { 3990#endif // _LIBCPP_NO_EXCEPTIONS 3991 typedef __shared_ptr_pointer<_Yp*, _Dp, allocator<_Yp> > _CntrlBlk; 3992 __cntrl_ = new _CntrlBlk(__p, __d, allocator<_Yp>()); 3993 __enable_weak_this(__p, __p); 3994#ifndef _LIBCPP_NO_EXCEPTIONS 3995 } 3996 catch (...) 3997 { 3998 __d(__p); 3999 throw; 4000 } 4001#endif // _LIBCPP_NO_EXCEPTIONS 4002} 4003 4004template<class _Tp> 4005template<class _Dp> 4006shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 4007 : __ptr_(0) 4008{ 4009#ifndef _LIBCPP_NO_EXCEPTIONS 4010 try 4011 { 4012#endif // _LIBCPP_NO_EXCEPTIONS 4013 typedef __shared_ptr_pointer<nullptr_t, _Dp, allocator<_Tp> > _CntrlBlk; 4014 __cntrl_ = new _CntrlBlk(__p, __d, allocator<_Tp>()); 4015#ifndef _LIBCPP_NO_EXCEPTIONS 4016 } 4017 catch (...) 4018 { 4019 __d(__p); 4020 throw; 4021 } 4022#endif // _LIBCPP_NO_EXCEPTIONS 4023} 4024 4025template<class _Tp> 4026template<class _Yp, class _Dp, class _Alloc> 4027shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 4028 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4029 : __ptr_(__p) 4030{ 4031#ifndef _LIBCPP_NO_EXCEPTIONS 4032 try 4033 { 4034#endif // _LIBCPP_NO_EXCEPTIONS 4035 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 4036 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4037 typedef __allocator_destructor<_A2> _D2; 4038 _A2 __a2(__a); 4039 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4040 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4041 _CntrlBlk(__p, __d, __a); 4042 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4043 __enable_weak_this(__p, __p); 4044#ifndef _LIBCPP_NO_EXCEPTIONS 4045 } 4046 catch (...) 4047 { 4048 __d(__p); 4049 throw; 4050 } 4051#endif // _LIBCPP_NO_EXCEPTIONS 4052} 4053 4054template<class _Tp> 4055template<class _Dp, class _Alloc> 4056shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 4057 : __ptr_(0) 4058{ 4059#ifndef _LIBCPP_NO_EXCEPTIONS 4060 try 4061 { 4062#endif // _LIBCPP_NO_EXCEPTIONS 4063 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 4064 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4065 typedef __allocator_destructor<_A2> _D2; 4066 _A2 __a2(__a); 4067 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4068 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4069 _CntrlBlk(__p, __d, __a); 4070 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4071#ifndef _LIBCPP_NO_EXCEPTIONS 4072 } 4073 catch (...) 4074 { 4075 __d(__p); 4076 throw; 4077 } 4078#endif // _LIBCPP_NO_EXCEPTIONS 4079} 4080 4081template<class _Tp> 4082template<class _Yp> 4083inline 4084shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 4085 : __ptr_(__p), 4086 __cntrl_(__r.__cntrl_) 4087{ 4088 if (__cntrl_) 4089 __cntrl_->__add_shared(); 4090} 4091 4092template<class _Tp> 4093inline 4094shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 4095 : __ptr_(__r.__ptr_), 4096 __cntrl_(__r.__cntrl_) 4097{ 4098 if (__cntrl_) 4099 __cntrl_->__add_shared(); 4100} 4101 4102template<class _Tp> 4103template<class _Yp> 4104inline 4105shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4106 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4107 _NOEXCEPT 4108 : __ptr_(__r.__ptr_), 4109 __cntrl_(__r.__cntrl_) 4110{ 4111 if (__cntrl_) 4112 __cntrl_->__add_shared(); 4113} 4114 4115#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4116 4117template<class _Tp> 4118inline 4119shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4120 : __ptr_(__r.__ptr_), 4121 __cntrl_(__r.__cntrl_) 4122{ 4123 __r.__ptr_ = 0; 4124 __r.__cntrl_ = 0; 4125} 4126 4127template<class _Tp> 4128template<class _Yp> 4129inline 4130shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4131 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4132 _NOEXCEPT 4133 : __ptr_(__r.__ptr_), 4134 __cntrl_(__r.__cntrl_) 4135{ 4136 __r.__ptr_ = 0; 4137 __r.__cntrl_ = 0; 4138} 4139 4140#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4141 4142#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4143template<class _Tp> 4144template<class _Yp> 4145#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4146shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4147#else 4148shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4149#endif 4150 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4151 : __ptr_(__r.get()) 4152{ 4153 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4154 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4155 __enable_weak_this(__r.get(), __r.get()); 4156 __r.release(); 4157} 4158#endif 4159 4160template<class _Tp> 4161template <class _Yp, class _Dp> 4162#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4163shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4164#else 4165shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4166#endif 4167 typename enable_if 4168 < 4169 !is_lvalue_reference<_Dp>::value && 4170 !is_array<_Yp>::value && 4171 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4172 __nat 4173 >::type) 4174 : __ptr_(__r.get()) 4175{ 4176#if _LIBCPP_STD_VER > 11 4177 if (__ptr_ == nullptr) 4178 __cntrl_ = nullptr; 4179 else 4180#endif 4181 { 4182 typedef __shared_ptr_pointer<_Yp*, _Dp, allocator<_Yp> > _CntrlBlk; 4183 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), allocator<_Yp>()); 4184 __enable_weak_this(__r.get(), __r.get()); 4185 } 4186 __r.release(); 4187} 4188 4189template<class _Tp> 4190template <class _Yp, class _Dp> 4191#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4192shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4193#else 4194shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4195#endif 4196 typename enable_if 4197 < 4198 is_lvalue_reference<_Dp>::value && 4199 !is_array<_Yp>::value && 4200 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4201 __nat 4202 >::type) 4203 : __ptr_(__r.get()) 4204{ 4205#if _LIBCPP_STD_VER > 11 4206 if (__ptr_ == nullptr) 4207 __cntrl_ = nullptr; 4208 else 4209#endif 4210 { 4211 typedef __shared_ptr_pointer<_Yp*, 4212 reference_wrapper<typename remove_reference<_Dp>::type>, 4213 allocator<_Yp> > _CntrlBlk; 4214 __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), allocator<_Yp>()); 4215 __enable_weak_this(__r.get(), __r.get()); 4216 } 4217 __r.release(); 4218} 4219 4220#ifndef _LIBCPP_HAS_NO_VARIADICS 4221 4222template<class _Tp> 4223template<class ..._Args> 4224shared_ptr<_Tp> 4225shared_ptr<_Tp>::make_shared(_Args&& ...__args) 4226{ 4227 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4228 typedef allocator<_CntrlBlk> _A2; 4229 typedef __allocator_destructor<_A2> _D2; 4230 _A2 __a2; 4231 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4232 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4233 shared_ptr<_Tp> __r; 4234 __r.__ptr_ = __hold2.get()->get(); 4235 __r.__cntrl_ = __hold2.release(); 4236 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4237 return __r; 4238} 4239 4240template<class _Tp> 4241template<class _Alloc, class ..._Args> 4242shared_ptr<_Tp> 4243shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args) 4244{ 4245 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4246 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4247 typedef __allocator_destructor<_A2> _D2; 4248 _A2 __a2(__a); 4249 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4250 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4251 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4252 shared_ptr<_Tp> __r; 4253 __r.__ptr_ = __hold2.get()->get(); 4254 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4255 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4256 return __r; 4257} 4258 4259#else // _LIBCPP_HAS_NO_VARIADICS 4260 4261template<class _Tp> 4262shared_ptr<_Tp> 4263shared_ptr<_Tp>::make_shared() 4264{ 4265 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4266 typedef allocator<_CntrlBlk> _Alloc2; 4267 typedef __allocator_destructor<_Alloc2> _D2; 4268 _Alloc2 __alloc2; 4269 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4270 ::new(__hold2.get()) _CntrlBlk(__alloc2); 4271 shared_ptr<_Tp> __r; 4272 __r.__ptr_ = __hold2.get()->get(); 4273 __r.__cntrl_ = __hold2.release(); 4274 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4275 return __r; 4276} 4277 4278template<class _Tp> 4279template<class _A0> 4280shared_ptr<_Tp> 4281shared_ptr<_Tp>::make_shared(_A0& __a0) 4282{ 4283 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4284 typedef allocator<_CntrlBlk> _Alloc2; 4285 typedef __allocator_destructor<_Alloc2> _D2; 4286 _Alloc2 __alloc2; 4287 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4288 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0); 4289 shared_ptr<_Tp> __r; 4290 __r.__ptr_ = __hold2.get()->get(); 4291 __r.__cntrl_ = __hold2.release(); 4292 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4293 return __r; 4294} 4295 4296template<class _Tp> 4297template<class _A0, class _A1> 4298shared_ptr<_Tp> 4299shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1) 4300{ 4301 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4302 typedef allocator<_CntrlBlk> _Alloc2; 4303 typedef __allocator_destructor<_Alloc2> _D2; 4304 _Alloc2 __alloc2; 4305 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4306 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1); 4307 shared_ptr<_Tp> __r; 4308 __r.__ptr_ = __hold2.get()->get(); 4309 __r.__cntrl_ = __hold2.release(); 4310 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4311 return __r; 4312} 4313 4314template<class _Tp> 4315template<class _A0, class _A1, class _A2> 4316shared_ptr<_Tp> 4317shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4318{ 4319 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4320 typedef allocator<_CntrlBlk> _Alloc2; 4321 typedef __allocator_destructor<_Alloc2> _D2; 4322 _Alloc2 __alloc2; 4323 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4324 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1, __a2); 4325 shared_ptr<_Tp> __r; 4326 __r.__ptr_ = __hold2.get()->get(); 4327 __r.__cntrl_ = __hold2.release(); 4328 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4329 return __r; 4330} 4331 4332template<class _Tp> 4333template<class _Alloc> 4334shared_ptr<_Tp> 4335shared_ptr<_Tp>::allocate_shared(const _Alloc& __a) 4336{ 4337 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4338 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4339 typedef __allocator_destructor<_Alloc2> _D2; 4340 _Alloc2 __alloc2(__a); 4341 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4342 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4343 _CntrlBlk(__a); 4344 shared_ptr<_Tp> __r; 4345 __r.__ptr_ = __hold2.get()->get(); 4346 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4347 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4348 return __r; 4349} 4350 4351template<class _Tp> 4352template<class _Alloc, class _A0> 4353shared_ptr<_Tp> 4354shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0) 4355{ 4356 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4357 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4358 typedef __allocator_destructor<_Alloc2> _D2; 4359 _Alloc2 __alloc2(__a); 4360 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4361 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4362 _CntrlBlk(__a, __a0); 4363 shared_ptr<_Tp> __r; 4364 __r.__ptr_ = __hold2.get()->get(); 4365 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4366 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4367 return __r; 4368} 4369 4370template<class _Tp> 4371template<class _Alloc, class _A0, class _A1> 4372shared_ptr<_Tp> 4373shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4374{ 4375 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4376 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4377 typedef __allocator_destructor<_Alloc2> _D2; 4378 _Alloc2 __alloc2(__a); 4379 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4380 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4381 _CntrlBlk(__a, __a0, __a1); 4382 shared_ptr<_Tp> __r; 4383 __r.__ptr_ = __hold2.get()->get(); 4384 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4385 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4386 return __r; 4387} 4388 4389template<class _Tp> 4390template<class _Alloc, class _A0, class _A1, class _A2> 4391shared_ptr<_Tp> 4392shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4393{ 4394 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4395 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4396 typedef __allocator_destructor<_Alloc2> _D2; 4397 _Alloc2 __alloc2(__a); 4398 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4399 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4400 _CntrlBlk(__a, __a0, __a1, __a2); 4401 shared_ptr<_Tp> __r; 4402 __r.__ptr_ = __hold2.get()->get(); 4403 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4404 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4405 return __r; 4406} 4407 4408#endif // _LIBCPP_HAS_NO_VARIADICS 4409 4410template<class _Tp> 4411shared_ptr<_Tp>::~shared_ptr() 4412{ 4413 if (__cntrl_) 4414 __cntrl_->__release_shared(); 4415} 4416 4417template<class _Tp> 4418inline 4419shared_ptr<_Tp>& 4420shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4421{ 4422 shared_ptr(__r).swap(*this); 4423 return *this; 4424} 4425 4426template<class _Tp> 4427template<class _Yp> 4428inline 4429typename enable_if 4430< 4431 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4432 shared_ptr<_Tp>& 4433>::type 4434shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4435{ 4436 shared_ptr(__r).swap(*this); 4437 return *this; 4438} 4439 4440#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4441 4442template<class _Tp> 4443inline 4444shared_ptr<_Tp>& 4445shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4446{ 4447 shared_ptr(_VSTD::move(__r)).swap(*this); 4448 return *this; 4449} 4450 4451template<class _Tp> 4452template<class _Yp> 4453inline 4454typename enable_if 4455< 4456 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4457 shared_ptr<_Tp>& 4458>::type 4459shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4460{ 4461 shared_ptr(_VSTD::move(__r)).swap(*this); 4462 return *this; 4463} 4464 4465#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4466template<class _Tp> 4467template<class _Yp> 4468inline 4469typename enable_if 4470< 4471 !is_array<_Yp>::value && 4472 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4473 shared_ptr<_Tp> 4474>::type& 4475shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4476{ 4477 shared_ptr(_VSTD::move(__r)).swap(*this); 4478 return *this; 4479} 4480#endif 4481 4482template<class _Tp> 4483template <class _Yp, class _Dp> 4484inline 4485typename enable_if 4486< 4487 !is_array<_Yp>::value && 4488 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4489 typename shared_ptr<_Tp>::element_type*>::value, 4490 shared_ptr<_Tp>& 4491>::type 4492shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4493{ 4494 shared_ptr(_VSTD::move(__r)).swap(*this); 4495 return *this; 4496} 4497 4498#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4499 4500#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4501template<class _Tp> 4502template<class _Yp> 4503inline _LIBCPP_INLINE_VISIBILITY 4504typename enable_if 4505< 4506 !is_array<_Yp>::value && 4507 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4508 shared_ptr<_Tp>& 4509>::type 4510shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4511{ 4512 shared_ptr(__r).swap(*this); 4513 return *this; 4514} 4515#endif 4516 4517template<class _Tp> 4518template <class _Yp, class _Dp> 4519inline _LIBCPP_INLINE_VISIBILITY 4520typename enable_if 4521< 4522 !is_array<_Yp>::value && 4523 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4524 typename shared_ptr<_Tp>::element_type*>::value, 4525 shared_ptr<_Tp>& 4526>::type 4527shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4528{ 4529 shared_ptr(_VSTD::move(__r)).swap(*this); 4530 return *this; 4531} 4532 4533#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4534 4535template<class _Tp> 4536inline 4537void 4538shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4539{ 4540 _VSTD::swap(__ptr_, __r.__ptr_); 4541 _VSTD::swap(__cntrl_, __r.__cntrl_); 4542} 4543 4544template<class _Tp> 4545inline 4546void 4547shared_ptr<_Tp>::reset() _NOEXCEPT 4548{ 4549 shared_ptr().swap(*this); 4550} 4551 4552template<class _Tp> 4553template<class _Yp> 4554inline 4555typename enable_if 4556< 4557 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4558 void 4559>::type 4560shared_ptr<_Tp>::reset(_Yp* __p) 4561{ 4562 shared_ptr(__p).swap(*this); 4563} 4564 4565template<class _Tp> 4566template<class _Yp, class _Dp> 4567inline 4568typename enable_if 4569< 4570 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4571 void 4572>::type 4573shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4574{ 4575 shared_ptr(__p, __d).swap(*this); 4576} 4577 4578template<class _Tp> 4579template<class _Yp, class _Dp, class _Alloc> 4580inline 4581typename enable_if 4582< 4583 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4584 void 4585>::type 4586shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4587{ 4588 shared_ptr(__p, __d, __a).swap(*this); 4589} 4590 4591#ifndef _LIBCPP_HAS_NO_VARIADICS 4592 4593template<class _Tp, class ..._Args> 4594inline _LIBCPP_INLINE_VISIBILITY 4595typename enable_if 4596< 4597 !is_array<_Tp>::value, 4598 shared_ptr<_Tp> 4599>::type 4600make_shared(_Args&& ...__args) 4601{ 4602 return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...); 4603} 4604 4605template<class _Tp, class _Alloc, class ..._Args> 4606inline _LIBCPP_INLINE_VISIBILITY 4607typename enable_if 4608< 4609 !is_array<_Tp>::value, 4610 shared_ptr<_Tp> 4611>::type 4612allocate_shared(const _Alloc& __a, _Args&& ...__args) 4613{ 4614 return shared_ptr<_Tp>::allocate_shared(__a, _VSTD::forward<_Args>(__args)...); 4615} 4616 4617#else // _LIBCPP_HAS_NO_VARIADICS 4618 4619template<class _Tp> 4620inline _LIBCPP_INLINE_VISIBILITY 4621shared_ptr<_Tp> 4622make_shared() 4623{ 4624 return shared_ptr<_Tp>::make_shared(); 4625} 4626 4627template<class _Tp, class _A0> 4628inline _LIBCPP_INLINE_VISIBILITY 4629shared_ptr<_Tp> 4630make_shared(_A0& __a0) 4631{ 4632 return shared_ptr<_Tp>::make_shared(__a0); 4633} 4634 4635template<class _Tp, class _A0, class _A1> 4636inline _LIBCPP_INLINE_VISIBILITY 4637shared_ptr<_Tp> 4638make_shared(_A0& __a0, _A1& __a1) 4639{ 4640 return shared_ptr<_Tp>::make_shared(__a0, __a1); 4641} 4642 4643template<class _Tp, class _A0, class _A1, class _A2> 4644inline _LIBCPP_INLINE_VISIBILITY 4645shared_ptr<_Tp> 4646make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4647{ 4648 return shared_ptr<_Tp>::make_shared(__a0, __a1, __a2); 4649} 4650 4651template<class _Tp, class _Alloc> 4652inline _LIBCPP_INLINE_VISIBILITY 4653shared_ptr<_Tp> 4654allocate_shared(const _Alloc& __a) 4655{ 4656 return shared_ptr<_Tp>::allocate_shared(__a); 4657} 4658 4659template<class _Tp, class _Alloc, class _A0> 4660inline _LIBCPP_INLINE_VISIBILITY 4661shared_ptr<_Tp> 4662allocate_shared(const _Alloc& __a, _A0& __a0) 4663{ 4664 return shared_ptr<_Tp>::allocate_shared(__a, __a0); 4665} 4666 4667template<class _Tp, class _Alloc, class _A0, class _A1> 4668inline _LIBCPP_INLINE_VISIBILITY 4669shared_ptr<_Tp> 4670allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4671{ 4672 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1); 4673} 4674 4675template<class _Tp, class _Alloc, class _A0, class _A1, class _A2> 4676inline _LIBCPP_INLINE_VISIBILITY 4677shared_ptr<_Tp> 4678allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4679{ 4680 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1, __a2); 4681} 4682 4683#endif // _LIBCPP_HAS_NO_VARIADICS 4684 4685template<class _Tp, class _Up> 4686inline _LIBCPP_INLINE_VISIBILITY 4687bool 4688operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4689{ 4690 return __x.get() == __y.get(); 4691} 4692 4693template<class _Tp, class _Up> 4694inline _LIBCPP_INLINE_VISIBILITY 4695bool 4696operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4697{ 4698 return !(__x == __y); 4699} 4700 4701template<class _Tp, class _Up> 4702inline _LIBCPP_INLINE_VISIBILITY 4703bool 4704operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4705{ 4706 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4707 return less<_Vp>()(__x.get(), __y.get()); 4708} 4709 4710template<class _Tp, class _Up> 4711inline _LIBCPP_INLINE_VISIBILITY 4712bool 4713operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4714{ 4715 return __y < __x; 4716} 4717 4718template<class _Tp, class _Up> 4719inline _LIBCPP_INLINE_VISIBILITY 4720bool 4721operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4722{ 4723 return !(__y < __x); 4724} 4725 4726template<class _Tp, class _Up> 4727inline _LIBCPP_INLINE_VISIBILITY 4728bool 4729operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4730{ 4731 return !(__x < __y); 4732} 4733 4734template<class _Tp> 4735inline _LIBCPP_INLINE_VISIBILITY 4736bool 4737operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4738{ 4739 return !__x; 4740} 4741 4742template<class _Tp> 4743inline _LIBCPP_INLINE_VISIBILITY 4744bool 4745operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4746{ 4747 return !__x; 4748} 4749 4750template<class _Tp> 4751inline _LIBCPP_INLINE_VISIBILITY 4752bool 4753operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4754{ 4755 return static_cast<bool>(__x); 4756} 4757 4758template<class _Tp> 4759inline _LIBCPP_INLINE_VISIBILITY 4760bool 4761operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4762{ 4763 return static_cast<bool>(__x); 4764} 4765 4766template<class _Tp> 4767inline _LIBCPP_INLINE_VISIBILITY 4768bool 4769operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4770{ 4771 return less<_Tp*>()(__x.get(), nullptr); 4772} 4773 4774template<class _Tp> 4775inline _LIBCPP_INLINE_VISIBILITY 4776bool 4777operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4778{ 4779 return less<_Tp*>()(nullptr, __x.get()); 4780} 4781 4782template<class _Tp> 4783inline _LIBCPP_INLINE_VISIBILITY 4784bool 4785operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4786{ 4787 return nullptr < __x; 4788} 4789 4790template<class _Tp> 4791inline _LIBCPP_INLINE_VISIBILITY 4792bool 4793operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4794{ 4795 return __x < nullptr; 4796} 4797 4798template<class _Tp> 4799inline _LIBCPP_INLINE_VISIBILITY 4800bool 4801operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4802{ 4803 return !(nullptr < __x); 4804} 4805 4806template<class _Tp> 4807inline _LIBCPP_INLINE_VISIBILITY 4808bool 4809operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4810{ 4811 return !(__x < nullptr); 4812} 4813 4814template<class _Tp> 4815inline _LIBCPP_INLINE_VISIBILITY 4816bool 4817operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4818{ 4819 return !(__x < nullptr); 4820} 4821 4822template<class _Tp> 4823inline _LIBCPP_INLINE_VISIBILITY 4824bool 4825operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4826{ 4827 return !(nullptr < __x); 4828} 4829 4830template<class _Tp> 4831inline _LIBCPP_INLINE_VISIBILITY 4832void 4833swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4834{ 4835 __x.swap(__y); 4836} 4837 4838template<class _Tp, class _Up> 4839inline _LIBCPP_INLINE_VISIBILITY 4840typename enable_if 4841< 4842 !is_array<_Tp>::value && !is_array<_Up>::value, 4843 shared_ptr<_Tp> 4844>::type 4845static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4846{ 4847 return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); 4848} 4849 4850template<class _Tp, class _Up> 4851inline _LIBCPP_INLINE_VISIBILITY 4852typename enable_if 4853< 4854 !is_array<_Tp>::value && !is_array<_Up>::value, 4855 shared_ptr<_Tp> 4856>::type 4857dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4858{ 4859 _Tp* __p = dynamic_cast<_Tp*>(__r.get()); 4860 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4861} 4862 4863template<class _Tp, class _Up> 4864typename enable_if 4865< 4866 is_array<_Tp>::value == is_array<_Up>::value, 4867 shared_ptr<_Tp> 4868>::type 4869const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4870{ 4871 typedef typename remove_extent<_Tp>::type _RTp; 4872 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4873} 4874 4875#ifndef _LIBCPP_NO_RTTI 4876 4877template<class _Dp, class _Tp> 4878inline _LIBCPP_INLINE_VISIBILITY 4879_Dp* 4880get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4881{ 4882 return __p.template __get_deleter<_Dp>(); 4883} 4884 4885#endif // _LIBCPP_NO_RTTI 4886 4887template<class _Tp> 4888class _LIBCPP_TEMPLATE_VIS weak_ptr 4889{ 4890public: 4891 typedef _Tp element_type; 4892private: 4893 element_type* __ptr_; 4894 __shared_weak_count* __cntrl_; 4895 4896public: 4897 _LIBCPP_INLINE_VISIBILITY 4898 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4899 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4900 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4901 _NOEXCEPT; 4902 _LIBCPP_INLINE_VISIBILITY 4903 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4904 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4905 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4906 _NOEXCEPT; 4907 4908#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4909 _LIBCPP_INLINE_VISIBILITY 4910 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4911 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4912 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4913 _NOEXCEPT; 4914#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4915 ~weak_ptr(); 4916 4917 _LIBCPP_INLINE_VISIBILITY 4918 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4919 template<class _Yp> 4920 typename enable_if 4921 < 4922 is_convertible<_Yp*, element_type*>::value, 4923 weak_ptr& 4924 >::type 4925 _LIBCPP_INLINE_VISIBILITY 4926 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4927 4928#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4929 4930 _LIBCPP_INLINE_VISIBILITY 4931 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4932 template<class _Yp> 4933 typename enable_if 4934 < 4935 is_convertible<_Yp*, element_type*>::value, 4936 weak_ptr& 4937 >::type 4938 _LIBCPP_INLINE_VISIBILITY 4939 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4940 4941#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4942 4943 template<class _Yp> 4944 typename enable_if 4945 < 4946 is_convertible<_Yp*, element_type*>::value, 4947 weak_ptr& 4948 >::type 4949 _LIBCPP_INLINE_VISIBILITY 4950 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4951 4952 _LIBCPP_INLINE_VISIBILITY 4953 void swap(weak_ptr& __r) _NOEXCEPT; 4954 _LIBCPP_INLINE_VISIBILITY 4955 void reset() _NOEXCEPT; 4956 4957 _LIBCPP_INLINE_VISIBILITY 4958 long use_count() const _NOEXCEPT 4959 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4960 _LIBCPP_INLINE_VISIBILITY 4961 bool expired() const _NOEXCEPT 4962 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4963 shared_ptr<_Tp> lock() const _NOEXCEPT; 4964 template<class _Up> 4965 _LIBCPP_INLINE_VISIBILITY 4966 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4967 {return __cntrl_ < __r.__cntrl_;} 4968 template<class _Up> 4969 _LIBCPP_INLINE_VISIBILITY 4970 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 4971 {return __cntrl_ < __r.__cntrl_;} 4972 4973 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4974 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4975}; 4976 4977template<class _Tp> 4978inline 4979_LIBCPP_CONSTEXPR 4980weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 4981 : __ptr_(0), 4982 __cntrl_(0) 4983{ 4984} 4985 4986template<class _Tp> 4987inline 4988weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 4989 : __ptr_(__r.__ptr_), 4990 __cntrl_(__r.__cntrl_) 4991{ 4992 if (__cntrl_) 4993 __cntrl_->__add_weak(); 4994} 4995 4996template<class _Tp> 4997template<class _Yp> 4998inline 4999weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 5000 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5001 _NOEXCEPT 5002 : __ptr_(__r.__ptr_), 5003 __cntrl_(__r.__cntrl_) 5004{ 5005 if (__cntrl_) 5006 __cntrl_->__add_weak(); 5007} 5008 5009template<class _Tp> 5010template<class _Yp> 5011inline 5012weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 5013 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5014 _NOEXCEPT 5015 : __ptr_(__r.__ptr_), 5016 __cntrl_(__r.__cntrl_) 5017{ 5018 if (__cntrl_) 5019 __cntrl_->__add_weak(); 5020} 5021 5022#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5023 5024template<class _Tp> 5025inline 5026weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 5027 : __ptr_(__r.__ptr_), 5028 __cntrl_(__r.__cntrl_) 5029{ 5030 __r.__ptr_ = 0; 5031 __r.__cntrl_ = 0; 5032} 5033 5034template<class _Tp> 5035template<class _Yp> 5036inline 5037weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 5038 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5039 _NOEXCEPT 5040 : __ptr_(__r.__ptr_), 5041 __cntrl_(__r.__cntrl_) 5042{ 5043 __r.__ptr_ = 0; 5044 __r.__cntrl_ = 0; 5045} 5046 5047#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5048 5049template<class _Tp> 5050weak_ptr<_Tp>::~weak_ptr() 5051{ 5052 if (__cntrl_) 5053 __cntrl_->__release_weak(); 5054} 5055 5056template<class _Tp> 5057inline 5058weak_ptr<_Tp>& 5059weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 5060{ 5061 weak_ptr(__r).swap(*this); 5062 return *this; 5063} 5064 5065template<class _Tp> 5066template<class _Yp> 5067inline 5068typename enable_if 5069< 5070 is_convertible<_Yp*, _Tp*>::value, 5071 weak_ptr<_Tp>& 5072>::type 5073weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 5074{ 5075 weak_ptr(__r).swap(*this); 5076 return *this; 5077} 5078 5079#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5080 5081template<class _Tp> 5082inline 5083weak_ptr<_Tp>& 5084weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 5085{ 5086 weak_ptr(_VSTD::move(__r)).swap(*this); 5087 return *this; 5088} 5089 5090template<class _Tp> 5091template<class _Yp> 5092inline 5093typename enable_if 5094< 5095 is_convertible<_Yp*, _Tp*>::value, 5096 weak_ptr<_Tp>& 5097>::type 5098weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 5099{ 5100 weak_ptr(_VSTD::move(__r)).swap(*this); 5101 return *this; 5102} 5103 5104#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5105 5106template<class _Tp> 5107template<class _Yp> 5108inline 5109typename enable_if 5110< 5111 is_convertible<_Yp*, _Tp*>::value, 5112 weak_ptr<_Tp>& 5113>::type 5114weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 5115{ 5116 weak_ptr(__r).swap(*this); 5117 return *this; 5118} 5119 5120template<class _Tp> 5121inline 5122void 5123weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 5124{ 5125 _VSTD::swap(__ptr_, __r.__ptr_); 5126 _VSTD::swap(__cntrl_, __r.__cntrl_); 5127} 5128 5129template<class _Tp> 5130inline _LIBCPP_INLINE_VISIBILITY 5131void 5132swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 5133{ 5134 __x.swap(__y); 5135} 5136 5137template<class _Tp> 5138inline 5139void 5140weak_ptr<_Tp>::reset() _NOEXCEPT 5141{ 5142 weak_ptr().swap(*this); 5143} 5144 5145template<class _Tp> 5146template<class _Yp> 5147shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 5148 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 5149 : __ptr_(__r.__ptr_), 5150 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 5151{ 5152 if (__cntrl_ == 0) 5153 __throw_bad_weak_ptr(); 5154} 5155 5156template<class _Tp> 5157shared_ptr<_Tp> 5158weak_ptr<_Tp>::lock() const _NOEXCEPT 5159{ 5160 shared_ptr<_Tp> __r; 5161 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 5162 if (__r.__cntrl_) 5163 __r.__ptr_ = __ptr_; 5164 return __r; 5165} 5166 5167#if _LIBCPP_STD_VER > 14 5168template <class _Tp = void> struct owner_less; 5169#else 5170template <class _Tp> struct owner_less; 5171#endif 5172 5173template <class _Tp> 5174struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 5175 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 5176{ 5177 typedef bool result_type; 5178 _LIBCPP_INLINE_VISIBILITY 5179 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5180 {return __x.owner_before(__y);} 5181 _LIBCPP_INLINE_VISIBILITY 5182 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5183 {return __x.owner_before(__y);} 5184 _LIBCPP_INLINE_VISIBILITY 5185 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5186 {return __x.owner_before(__y);} 5187}; 5188 5189template <class _Tp> 5190struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 5191 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 5192{ 5193 typedef bool result_type; 5194 _LIBCPP_INLINE_VISIBILITY 5195 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5196 {return __x.owner_before(__y);} 5197 _LIBCPP_INLINE_VISIBILITY 5198 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5199 {return __x.owner_before(__y);} 5200 _LIBCPP_INLINE_VISIBILITY 5201 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5202 {return __x.owner_before(__y);} 5203}; 5204 5205#if _LIBCPP_STD_VER > 14 5206template <> 5207struct _LIBCPP_TEMPLATE_VIS owner_less<void> 5208{ 5209 template <class _Tp, class _Up> 5210 _LIBCPP_INLINE_VISIBILITY 5211 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5212 {return __x.owner_before(__y);} 5213 template <class _Tp, class _Up> 5214 _LIBCPP_INLINE_VISIBILITY 5215 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5216 {return __x.owner_before(__y);} 5217 template <class _Tp, class _Up> 5218 _LIBCPP_INLINE_VISIBILITY 5219 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5220 {return __x.owner_before(__y);} 5221 template <class _Tp, class _Up> 5222 _LIBCPP_INLINE_VISIBILITY 5223 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5224 {return __x.owner_before(__y);} 5225 typedef void is_transparent; 5226}; 5227#endif 5228 5229template<class _Tp> 5230class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 5231{ 5232 mutable weak_ptr<_Tp> __weak_this_; 5233protected: 5234 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 5235 enable_shared_from_this() _NOEXCEPT {} 5236 _LIBCPP_INLINE_VISIBILITY 5237 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 5238 _LIBCPP_INLINE_VISIBILITY 5239 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 5240 {return *this;} 5241 _LIBCPP_INLINE_VISIBILITY 5242 ~enable_shared_from_this() {} 5243public: 5244 _LIBCPP_INLINE_VISIBILITY 5245 shared_ptr<_Tp> shared_from_this() 5246 {return shared_ptr<_Tp>(__weak_this_);} 5247 _LIBCPP_INLINE_VISIBILITY 5248 shared_ptr<_Tp const> shared_from_this() const 5249 {return shared_ptr<const _Tp>(__weak_this_);} 5250 5251#if _LIBCPP_STD_VER > 14 5252 _LIBCPP_INLINE_VISIBILITY 5253 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 5254 { return __weak_this_; } 5255 5256 _LIBCPP_INLINE_VISIBILITY 5257 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 5258 { return __weak_this_; } 5259#endif // _LIBCPP_STD_VER > 14 5260 5261 template <class _Up> friend class shared_ptr; 5262}; 5263 5264template <class _Tp> 5265struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 5266{ 5267 typedef shared_ptr<_Tp> argument_type; 5268 typedef size_t result_type; 5269 5270 _LIBCPP_INLINE_VISIBILITY 5271 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 5272 { 5273 return hash<_Tp*>()(__ptr.get()); 5274 } 5275}; 5276 5277template<class _CharT, class _Traits, class _Yp> 5278inline _LIBCPP_INLINE_VISIBILITY 5279basic_ostream<_CharT, _Traits>& 5280operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 5281 5282 5283#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5284 5285class _LIBCPP_TYPE_VIS __sp_mut 5286{ 5287 void* __lx; 5288public: 5289 void lock() _NOEXCEPT; 5290 void unlock() _NOEXCEPT; 5291 5292private: 5293 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 5294 __sp_mut(const __sp_mut&); 5295 __sp_mut& operator=(const __sp_mut&); 5296 5297 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 5298}; 5299 5300_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5301__sp_mut& __get_sp_mut(const void*); 5302 5303template <class _Tp> 5304inline _LIBCPP_INLINE_VISIBILITY 5305bool 5306atomic_is_lock_free(const shared_ptr<_Tp>*) 5307{ 5308 return false; 5309} 5310 5311template <class _Tp> 5312_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5313shared_ptr<_Tp> 5314atomic_load(const shared_ptr<_Tp>* __p) 5315{ 5316 __sp_mut& __m = __get_sp_mut(__p); 5317 __m.lock(); 5318 shared_ptr<_Tp> __q = *__p; 5319 __m.unlock(); 5320 return __q; 5321} 5322 5323template <class _Tp> 5324inline _LIBCPP_INLINE_VISIBILITY 5325_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5326shared_ptr<_Tp> 5327atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5328{ 5329 return atomic_load(__p); 5330} 5331 5332template <class _Tp> 5333_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5334void 5335atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5336{ 5337 __sp_mut& __m = __get_sp_mut(__p); 5338 __m.lock(); 5339 __p->swap(__r); 5340 __m.unlock(); 5341} 5342 5343template <class _Tp> 5344inline _LIBCPP_INLINE_VISIBILITY 5345_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5346void 5347atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5348{ 5349 atomic_store(__p, __r); 5350} 5351 5352template <class _Tp> 5353_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5354shared_ptr<_Tp> 5355atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5356{ 5357 __sp_mut& __m = __get_sp_mut(__p); 5358 __m.lock(); 5359 __p->swap(__r); 5360 __m.unlock(); 5361 return __r; 5362} 5363 5364template <class _Tp> 5365inline _LIBCPP_INLINE_VISIBILITY 5366_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5367shared_ptr<_Tp> 5368atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5369{ 5370 return atomic_exchange(__p, __r); 5371} 5372 5373template <class _Tp> 5374_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5375bool 5376atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5377{ 5378 shared_ptr<_Tp> __temp; 5379 __sp_mut& __m = __get_sp_mut(__p); 5380 __m.lock(); 5381 if (__p->__owner_equivalent(*__v)) 5382 { 5383 _VSTD::swap(__temp, *__p); 5384 *__p = __w; 5385 __m.unlock(); 5386 return true; 5387 } 5388 _VSTD::swap(__temp, *__v); 5389 *__v = *__p; 5390 __m.unlock(); 5391 return false; 5392} 5393 5394template <class _Tp> 5395inline _LIBCPP_INLINE_VISIBILITY 5396_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5397bool 5398atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5399{ 5400 return atomic_compare_exchange_strong(__p, __v, __w); 5401} 5402 5403template <class _Tp> 5404inline _LIBCPP_INLINE_VISIBILITY 5405_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5406bool 5407atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5408 shared_ptr<_Tp> __w, memory_order, memory_order) 5409{ 5410 return atomic_compare_exchange_strong(__p, __v, __w); 5411} 5412 5413template <class _Tp> 5414inline _LIBCPP_INLINE_VISIBILITY 5415_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5416bool 5417atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5418 shared_ptr<_Tp> __w, memory_order, memory_order) 5419{ 5420 return atomic_compare_exchange_weak(__p, __v, __w); 5421} 5422 5423#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5424 5425//enum class 5426#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5427# ifndef _LIBCPP_CXX03_LANG 5428enum class pointer_safety : unsigned char { 5429 relaxed, 5430 preferred, 5431 strict 5432}; 5433# endif 5434#else 5435struct _LIBCPP_TYPE_VIS pointer_safety 5436{ 5437 enum __lx 5438 { 5439 relaxed, 5440 preferred, 5441 strict 5442 }; 5443 5444 __lx __v_; 5445 5446 _LIBCPP_INLINE_VISIBILITY 5447 pointer_safety() : __v_() {} 5448 5449 _LIBCPP_INLINE_VISIBILITY 5450 pointer_safety(__lx __v) : __v_(__v) {} 5451 _LIBCPP_INLINE_VISIBILITY 5452 operator int() const {return __v_;} 5453}; 5454#endif 5455 5456#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5457 defined(_LIBCPP_BUILDING_MEMORY) 5458_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5459#else 5460// This function is only offered in C++03 under ABI v1. 5461# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5462inline _LIBCPP_INLINE_VISIBILITY 5463pointer_safety get_pointer_safety() _NOEXCEPT { 5464 return pointer_safety::relaxed; 5465} 5466# endif 5467#endif 5468 5469 5470_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5471_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5472_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5473_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5474 5475template <class _Tp> 5476inline _LIBCPP_INLINE_VISIBILITY 5477_Tp* 5478undeclare_reachable(_Tp* __p) 5479{ 5480 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5481} 5482 5483_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5484 5485// --- Helper for container swap -- 5486template <typename _Alloc> 5487inline _LIBCPP_INLINE_VISIBILITY 5488void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5489#if _LIBCPP_STD_VER >= 14 5490 _NOEXCEPT 5491#else 5492 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5493#endif 5494{ 5495 __swap_allocator(__a1, __a2, 5496 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5497} 5498 5499template <typename _Alloc> 5500_LIBCPP_INLINE_VISIBILITY 5501void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5502#if _LIBCPP_STD_VER >= 14 5503 _NOEXCEPT 5504#else 5505 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5506#endif 5507{ 5508 using _VSTD::swap; 5509 swap(__a1, __a2); 5510} 5511 5512template <typename _Alloc> 5513inline _LIBCPP_INLINE_VISIBILITY 5514void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5515 5516template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5517struct __noexcept_move_assign_container : public integral_constant<bool, 5518 _Traits::propagate_on_container_move_assignment::value 5519#if _LIBCPP_STD_VER > 14 5520 || _Traits::is_always_equal::value 5521#else 5522 && is_nothrow_move_assignable<_Alloc>::value 5523#endif 5524 > {}; 5525 5526 5527#ifndef _LIBCPP_HAS_NO_VARIADICS 5528template <class _Tp, class _Alloc> 5529struct __temp_value { 5530 typedef allocator_traits<_Alloc> _Traits; 5531 5532 typename aligned_storage<sizeof(_Tp), alignof(_Tp)>::type __v; 5533 _Alloc &__a; 5534 5535 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5536 _Tp & get() { return *__addr(); } 5537 5538 template<class... _Args> 5539 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) 5540 { _Traits::construct(__a, __addr(), _VSTD::forward<_Args>(__args)...); } 5541 5542 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5543 }; 5544#endif 5545 5546_LIBCPP_END_NAMESPACE_STD 5547 5548#endif // _LIBCPP_MEMORY 5549