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 static_assert(!is_function<_Tp>::value, 2255 "default_delete cannot be instantiated for function types"); 2256#ifndef _LIBCPP_CXX03_LANG 2257 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2258#else 2259 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2260#endif 2261 template <class _Up> 2262 _LIBCPP_INLINE_VISIBILITY 2263 default_delete(const default_delete<_Up>&, 2264 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2265 0) _NOEXCEPT {} 2266 2267 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2268 static_assert(sizeof(_Tp) > 0, 2269 "default_delete can not delete incomplete type"); 2270 static_assert(!is_void<_Tp>::value, 2271 "default_delete can not delete incomplete type"); 2272 delete __ptr; 2273 } 2274}; 2275 2276template <class _Tp> 2277struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2278private: 2279 template <class _Up> 2280 struct _EnableIfConvertible 2281 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2282 2283public: 2284#ifndef _LIBCPP_CXX03_LANG 2285 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2286#else 2287 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2288#endif 2289 2290 template <class _Up> 2291 _LIBCPP_INLINE_VISIBILITY 2292 default_delete(const default_delete<_Up[]>&, 2293 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2294 2295 template <class _Up> 2296 _LIBCPP_INLINE_VISIBILITY 2297 typename _EnableIfConvertible<_Up>::type 2298 operator()(_Up* __ptr) const _NOEXCEPT { 2299 static_assert(sizeof(_Tp) > 0, 2300 "default_delete can not delete incomplete type"); 2301 static_assert(!is_void<_Tp>::value, 2302 "default_delete can not delete void type"); 2303 delete[] __ptr; 2304 } 2305}; 2306 2307 2308 2309#ifndef _LIBCPP_CXX03_LANG 2310template <class _Deleter> 2311struct __unique_ptr_deleter_sfinae { 2312 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2313 typedef const _Deleter& __lval_ref_type; 2314 typedef _Deleter&& __good_rval_ref_type; 2315 typedef true_type __enable_rval_overload; 2316}; 2317 2318template <class _Deleter> 2319struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2320 typedef const _Deleter& __lval_ref_type; 2321 typedef const _Deleter&& __bad_rval_ref_type; 2322 typedef false_type __enable_rval_overload; 2323}; 2324 2325template <class _Deleter> 2326struct __unique_ptr_deleter_sfinae<_Deleter&> { 2327 typedef _Deleter& __lval_ref_type; 2328 typedef _Deleter&& __bad_rval_ref_type; 2329 typedef false_type __enable_rval_overload; 2330}; 2331#endif // !defined(_LIBCPP_CXX03_LANG) 2332 2333template <class _Tp, class _Dp = default_delete<_Tp> > 2334class _LIBCPP_TEMPLATE_VIS unique_ptr { 2335public: 2336 typedef _Tp element_type; 2337 typedef _Dp deleter_type; 2338 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2339 2340 static_assert(!is_rvalue_reference<deleter_type>::value, 2341 "the specified deleter type cannot be an rvalue reference"); 2342 2343private: 2344 __compressed_pair<pointer, deleter_type> __ptr_; 2345 2346 struct __nat { int __for_bool_; }; 2347 2348#ifndef _LIBCPP_CXX03_LANG 2349 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2350 2351 template <bool _Dummy> 2352 using _LValRefType = 2353 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2354 2355 template <bool _Dummy> 2356 using _GoodRValRefType = 2357 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2358 2359 template <bool _Dummy> 2360 using _BadRValRefType = 2361 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2362 2363 template <bool _Dummy, class _Deleter = typename __dependent_type< 2364 __identity<deleter_type>, _Dummy>::type> 2365 using _EnableIfDeleterDefaultConstructible = 2366 typename enable_if<is_default_constructible<_Deleter>::value && 2367 !is_pointer<_Deleter>::value>::type; 2368 2369 template <class _ArgType> 2370 using _EnableIfDeleterConstructible = 2371 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2372 2373 template <class _UPtr, class _Up> 2374 using _EnableIfMoveConvertible = typename enable_if< 2375 is_convertible<typename _UPtr::pointer, pointer>::value && 2376 !is_array<_Up>::value 2377 >::type; 2378 2379 template <class _UDel> 2380 using _EnableIfDeleterConvertible = typename enable_if< 2381 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2382 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2383 >::type; 2384 2385 template <class _UDel> 2386 using _EnableIfDeleterAssignable = typename enable_if< 2387 is_assignable<_Dp&, _UDel&&>::value 2388 >::type; 2389 2390public: 2391 template <bool _Dummy = true, 2392 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2393 _LIBCPP_INLINE_VISIBILITY 2394 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2395 2396 template <bool _Dummy = true, 2397 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2398 _LIBCPP_INLINE_VISIBILITY 2399 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2400 2401 template <bool _Dummy = true, 2402 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2403 _LIBCPP_INLINE_VISIBILITY 2404 explicit unique_ptr(pointer __p) noexcept : __ptr_(__p) {} 2405 2406 template <bool _Dummy = true, 2407 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2408 _LIBCPP_INLINE_VISIBILITY 2409 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) noexcept 2410 : __ptr_(__p, __d) {} 2411 2412 template <bool _Dummy = true, 2413 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2414 _LIBCPP_INLINE_VISIBILITY 2415 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) noexcept 2416 : __ptr_(__p, _VSTD::move(__d)) { 2417 static_assert(!is_reference<deleter_type>::value, 2418 "rvalue deleter bound to reference"); 2419 } 2420 2421 template <bool _Dummy = true, 2422 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>> 2423 _LIBCPP_INLINE_VISIBILITY 2424 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2425 2426 _LIBCPP_INLINE_VISIBILITY 2427 unique_ptr(unique_ptr&& __u) noexcept 2428 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2429 } 2430 2431 template <class _Up, class _Ep, 2432 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2433 class = _EnableIfDeleterConvertible<_Ep> 2434 > 2435 _LIBCPP_INLINE_VISIBILITY 2436 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2437 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2438 2439#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2440 template <class _Up> 2441 _LIBCPP_INLINE_VISIBILITY 2442 unique_ptr(auto_ptr<_Up>&& __p, 2443 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2444 is_same<_Dp, default_delete<_Tp>>::value, 2445 __nat>::type = __nat()) _NOEXCEPT 2446 : __ptr_(__p.release()) {} 2447#endif 2448 2449 _LIBCPP_INLINE_VISIBILITY 2450 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2451 reset(__u.release()); 2452 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2453 return *this; 2454 } 2455 2456 template <class _Up, class _Ep, 2457 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2458 class = _EnableIfDeleterAssignable<_Ep> 2459 > 2460 _LIBCPP_INLINE_VISIBILITY 2461 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2462 reset(__u.release()); 2463 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2464 return *this; 2465 } 2466 2467#else // _LIBCPP_CXX03_LANG 2468private: 2469 unique_ptr(unique_ptr&); 2470 template <class _Up, class _Ep> unique_ptr(unique_ptr<_Up, _Ep>&); 2471 2472 unique_ptr& operator=(unique_ptr&); 2473 template <class _Up, class _Ep> unique_ptr& operator=(unique_ptr<_Up, _Ep>&); 2474 2475public: 2476 _LIBCPP_INLINE_VISIBILITY 2477 unique_ptr() : __ptr_(pointer()) 2478 { 2479 static_assert(!is_pointer<deleter_type>::value, 2480 "unique_ptr constructed with null function pointer deleter"); 2481 static_assert(is_default_constructible<deleter_type>::value, 2482 "unique_ptr::deleter_type is not default constructible"); 2483 } 2484 _LIBCPP_INLINE_VISIBILITY 2485 unique_ptr(nullptr_t) : __ptr_(pointer()) 2486 { 2487 static_assert(!is_pointer<deleter_type>::value, 2488 "unique_ptr constructed with null function pointer deleter"); 2489 } 2490 _LIBCPP_INLINE_VISIBILITY 2491 explicit unique_ptr(pointer __p) 2492 : __ptr_(_VSTD::move(__p)) { 2493 static_assert(!is_pointer<deleter_type>::value, 2494 "unique_ptr constructed with null function pointer deleter"); 2495 } 2496 2497 _LIBCPP_INLINE_VISIBILITY 2498 operator __rv<unique_ptr>() { 2499 return __rv<unique_ptr>(*this); 2500 } 2501 2502 _LIBCPP_INLINE_VISIBILITY 2503 unique_ptr(__rv<unique_ptr> __u) 2504 : __ptr_(__u->release(), 2505 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2506 2507 template <class _Up, class _Ep> 2508 _LIBCPP_INLINE_VISIBILITY 2509 typename enable_if< 2510 !is_array<_Up>::value && 2511 is_convertible<typename unique_ptr<_Up, _Ep>::pointer, 2512 pointer>::value && 2513 is_assignable<deleter_type&, _Ep&>::value, 2514 unique_ptr&>::type 2515 operator=(unique_ptr<_Up, _Ep> __u) { 2516 reset(__u.release()); 2517 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2518 return *this; 2519 } 2520 2521 _LIBCPP_INLINE_VISIBILITY 2522 unique_ptr(pointer __p, deleter_type __d) 2523 : __ptr_(_VSTD::move(__p), _VSTD::move(__d)) {} 2524#endif // _LIBCPP_CXX03_LANG 2525 2526#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2527 template <class _Up> 2528 _LIBCPP_INLINE_VISIBILITY 2529 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2530 is_same<_Dp, default_delete<_Tp> >::value, 2531 unique_ptr&>::type 2532 operator=(auto_ptr<_Up> __p) { 2533 reset(__p.release()); 2534 return *this; 2535 } 2536#endif 2537 2538 _LIBCPP_INLINE_VISIBILITY 2539 ~unique_ptr() { reset(); } 2540 2541 _LIBCPP_INLINE_VISIBILITY 2542 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2543 reset(); 2544 return *this; 2545 } 2546 2547 _LIBCPP_INLINE_VISIBILITY 2548 typename add_lvalue_reference<_Tp>::type 2549 operator*() const { 2550 return *__ptr_.first(); 2551 } 2552 _LIBCPP_INLINE_VISIBILITY 2553 pointer operator->() const _NOEXCEPT { 2554 return __ptr_.first(); 2555 } 2556 _LIBCPP_INLINE_VISIBILITY 2557 pointer get() const _NOEXCEPT { 2558 return __ptr_.first(); 2559 } 2560 _LIBCPP_INLINE_VISIBILITY 2561 deleter_type& get_deleter() _NOEXCEPT { 2562 return __ptr_.second(); 2563 } 2564 _LIBCPP_INLINE_VISIBILITY 2565 const deleter_type& get_deleter() const _NOEXCEPT { 2566 return __ptr_.second(); 2567 } 2568 _LIBCPP_INLINE_VISIBILITY 2569 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2570 return __ptr_.first() != nullptr; 2571 } 2572 2573 _LIBCPP_INLINE_VISIBILITY 2574 pointer release() _NOEXCEPT { 2575 pointer __t = __ptr_.first(); 2576 __ptr_.first() = pointer(); 2577 return __t; 2578 } 2579 2580 _LIBCPP_INLINE_VISIBILITY 2581 void reset(pointer __p = pointer()) _NOEXCEPT { 2582 pointer __tmp = __ptr_.first(); 2583 __ptr_.first() = __p; 2584 if (__tmp) 2585 __ptr_.second()(__tmp); 2586 } 2587 2588 _LIBCPP_INLINE_VISIBILITY 2589 void swap(unique_ptr& __u) _NOEXCEPT { 2590 __ptr_.swap(__u.__ptr_); 2591 } 2592}; 2593 2594 2595template <class _Tp, class _Dp> 2596class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2597public: 2598 typedef _Tp element_type; 2599 typedef _Dp deleter_type; 2600 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2601 2602private: 2603 __compressed_pair<pointer, deleter_type> __ptr_; 2604 2605 template <class _From> 2606 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2607 2608 template <class _FromElem> 2609 struct _CheckArrayPointerConversion<_FromElem*> 2610 : integral_constant<bool, 2611 is_same<_FromElem*, pointer>::value || 2612 (is_same<pointer, element_type*>::value && 2613 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2614 > 2615 {}; 2616 2617#ifndef _LIBCPP_CXX03_LANG 2618 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2619 2620 template <bool _Dummy> 2621 using _LValRefType = 2622 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2623 2624 template <bool _Dummy> 2625 using _GoodRValRefType = 2626 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2627 2628 template <bool _Dummy> 2629 using _BadRValRefType = 2630 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2631 2632 template <bool _Dummy, class _Deleter = typename __dependent_type< 2633 __identity<deleter_type>, _Dummy>::type> 2634 using _EnableIfDeleterDefaultConstructible = 2635 typename enable_if<is_default_constructible<_Deleter>::value && 2636 !is_pointer<_Deleter>::value>::type; 2637 2638 template <class _ArgType> 2639 using _EnableIfDeleterConstructible = 2640 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2641 2642 template <class _Pp> 2643 using _EnableIfPointerConvertible = typename enable_if< 2644 _CheckArrayPointerConversion<_Pp>::value 2645 >::type; 2646 2647 template <class _UPtr, class _Up, 2648 class _ElemT = typename _UPtr::element_type> 2649 using _EnableIfMoveConvertible = typename enable_if< 2650 is_array<_Up>::value && 2651 is_same<pointer, element_type*>::value && 2652 is_same<typename _UPtr::pointer, _ElemT*>::value && 2653 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2654 >::type; 2655 2656 template <class _UDel> 2657 using _EnableIfDeleterConvertible = typename enable_if< 2658 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2659 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2660 >::type; 2661 2662 template <class _UDel> 2663 using _EnableIfDeleterAssignable = typename enable_if< 2664 is_assignable<_Dp&, _UDel&&>::value 2665 >::type; 2666 2667public: 2668 template <bool _Dummy = true, 2669 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2670 _LIBCPP_INLINE_VISIBILITY 2671 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2672 2673 template <bool _Dummy = true, 2674 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2675 _LIBCPP_INLINE_VISIBILITY 2676 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2677 2678 template <class _Pp, bool _Dummy = true, 2679 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2680 class = _EnableIfPointerConvertible<_Pp>> 2681 _LIBCPP_INLINE_VISIBILITY 2682 explicit unique_ptr(_Pp __p) noexcept 2683 : __ptr_(__p) {} 2684 2685 template <class _Pp, bool _Dummy = true, 2686 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>, 2687 class = _EnableIfPointerConvertible<_Pp>> 2688 _LIBCPP_INLINE_VISIBILITY 2689 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) noexcept 2690 : __ptr_(__p, __d) {} 2691 2692 template <bool _Dummy = true, 2693 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2694 _LIBCPP_INLINE_VISIBILITY 2695 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) noexcept 2696 : __ptr_(nullptr, __d) {} 2697 2698 template <class _Pp, bool _Dummy = true, 2699 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>, 2700 class = _EnableIfPointerConvertible<_Pp>> 2701 _LIBCPP_INLINE_VISIBILITY 2702 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) noexcept 2703 : __ptr_(__p, _VSTD::move(__d)) { 2704 static_assert(!is_reference<deleter_type>::value, 2705 "rvalue deleter bound to reference"); 2706 } 2707 2708 template <bool _Dummy = true, 2709 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2710 _LIBCPP_INLINE_VISIBILITY 2711 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) noexcept 2712 : __ptr_(nullptr, _VSTD::move(__d)) { 2713 static_assert(!is_reference<deleter_type>::value, 2714 "rvalue deleter bound to reference"); 2715 } 2716 2717 template <class _Pp, bool _Dummy = true, 2718 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>, 2719 class = _EnableIfPointerConvertible<_Pp>> 2720 _LIBCPP_INLINE_VISIBILITY 2721 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2722 2723 _LIBCPP_INLINE_VISIBILITY 2724 unique_ptr(unique_ptr&& __u) noexcept 2725 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2726 } 2727 2728 _LIBCPP_INLINE_VISIBILITY 2729 unique_ptr& operator=(unique_ptr&& __u) noexcept { 2730 reset(__u.release()); 2731 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2732 return *this; 2733 } 2734 2735 template <class _Up, class _Ep, 2736 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2737 class = _EnableIfDeleterConvertible<_Ep> 2738 > 2739 _LIBCPP_INLINE_VISIBILITY 2740 unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept 2741 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2742 } 2743 2744 template <class _Up, class _Ep, 2745 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2746 class = _EnableIfDeleterAssignable<_Ep> 2747 > 2748 _LIBCPP_INLINE_VISIBILITY 2749 unique_ptr& 2750 operator=(unique_ptr<_Up, _Ep>&& __u) noexcept { 2751 reset(__u.release()); 2752 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2753 return *this; 2754 } 2755 2756#else // _LIBCPP_CXX03_LANG 2757private: 2758 template <class _Up> explicit unique_ptr(_Up); 2759 2760 unique_ptr(unique_ptr&); 2761 template <class _Up> unique_ptr(unique_ptr<_Up>&); 2762 2763 unique_ptr& operator=(unique_ptr&); 2764 template <class _Up> unique_ptr& operator=(unique_ptr<_Up>&); 2765 2766 template <class _Up> 2767 unique_ptr(_Up __u, 2768 typename conditional< 2769 is_reference<deleter_type>::value, deleter_type, 2770 typename add_lvalue_reference<const deleter_type>::type>::type, 2771 typename enable_if<is_convertible<_Up, pointer>::value, 2772 __nat>::type = __nat()); 2773public: 2774 _LIBCPP_INLINE_VISIBILITY 2775 unique_ptr() : __ptr_(pointer()) { 2776 static_assert(!is_pointer<deleter_type>::value, 2777 "unique_ptr constructed with null function pointer deleter"); 2778 } 2779 _LIBCPP_INLINE_VISIBILITY 2780 unique_ptr(nullptr_t) : __ptr_(pointer()) { 2781 static_assert(!is_pointer<deleter_type>::value, 2782 "unique_ptr constructed with null function pointer deleter"); 2783 } 2784 2785 _LIBCPP_INLINE_VISIBILITY 2786 explicit unique_ptr(pointer __p) : __ptr_(__p) { 2787 static_assert(!is_pointer<deleter_type>::value, 2788 "unique_ptr constructed with null function pointer deleter"); 2789 } 2790 2791 _LIBCPP_INLINE_VISIBILITY 2792 unique_ptr(pointer __p, deleter_type __d) 2793 : __ptr_(__p, _VSTD::forward<deleter_type>(__d)) {} 2794 2795 _LIBCPP_INLINE_VISIBILITY 2796 unique_ptr(nullptr_t, deleter_type __d) 2797 : __ptr_(pointer(), _VSTD::forward<deleter_type>(__d)) {} 2798 2799 _LIBCPP_INLINE_VISIBILITY 2800 operator __rv<unique_ptr>() { 2801 return __rv<unique_ptr>(*this); 2802 } 2803 2804 _LIBCPP_INLINE_VISIBILITY 2805 unique_ptr(__rv<unique_ptr> __u) 2806 : __ptr_(__u->release(), 2807 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2808 2809 _LIBCPP_INLINE_VISIBILITY 2810 unique_ptr& operator=(__rv<unique_ptr> __u) { 2811 reset(__u->release()); 2812 __ptr_.second() = _VSTD::forward<deleter_type>(__u->get_deleter()); 2813 return *this; 2814 } 2815 2816#endif // _LIBCPP_CXX03_LANG 2817 2818public: 2819 _LIBCPP_INLINE_VISIBILITY 2820 ~unique_ptr() { reset(); } 2821 2822 _LIBCPP_INLINE_VISIBILITY 2823 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2824 reset(); 2825 return *this; 2826 } 2827 2828 _LIBCPP_INLINE_VISIBILITY 2829 typename add_lvalue_reference<_Tp>::type 2830 operator[](size_t __i) const { 2831 return __ptr_.first()[__i]; 2832 } 2833 _LIBCPP_INLINE_VISIBILITY 2834 pointer get() const _NOEXCEPT { 2835 return __ptr_.first(); 2836 } 2837 2838 _LIBCPP_INLINE_VISIBILITY 2839 deleter_type& get_deleter() _NOEXCEPT { 2840 return __ptr_.second(); 2841 } 2842 2843 _LIBCPP_INLINE_VISIBILITY 2844 const deleter_type& get_deleter() const _NOEXCEPT { 2845 return __ptr_.second(); 2846 } 2847 _LIBCPP_INLINE_VISIBILITY 2848 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2849 return __ptr_.first() != nullptr; 2850 } 2851 2852 _LIBCPP_INLINE_VISIBILITY 2853 pointer release() _NOEXCEPT { 2854 pointer __t = __ptr_.first(); 2855 __ptr_.first() = pointer(); 2856 return __t; 2857 } 2858 2859 template <class _Pp> 2860 _LIBCPP_INLINE_VISIBILITY 2861 typename enable_if< 2862 _CheckArrayPointerConversion<_Pp>::value 2863 >::type 2864 reset(_Pp __p) _NOEXCEPT { 2865 pointer __tmp = __ptr_.first(); 2866 __ptr_.first() = __p; 2867 if (__tmp) 2868 __ptr_.second()(__tmp); 2869 } 2870 2871 _LIBCPP_INLINE_VISIBILITY 2872 void reset(nullptr_t = nullptr) _NOEXCEPT { 2873 pointer __tmp = __ptr_.first(); 2874 __ptr_.first() = nullptr; 2875 if (__tmp) 2876 __ptr_.second()(__tmp); 2877 } 2878 2879 _LIBCPP_INLINE_VISIBILITY 2880 void swap(unique_ptr& __u) _NOEXCEPT { 2881 __ptr_.swap(__u.__ptr_); 2882 } 2883 2884}; 2885 2886template <class _Tp, class _Dp> 2887inline _LIBCPP_INLINE_VISIBILITY 2888typename enable_if< 2889 __is_swappable<_Dp>::value, 2890 void 2891>::type 2892swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2893 2894template <class _T1, class _D1, class _T2, class _D2> 2895inline _LIBCPP_INLINE_VISIBILITY 2896bool 2897operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2898 2899template <class _T1, class _D1, class _T2, class _D2> 2900inline _LIBCPP_INLINE_VISIBILITY 2901bool 2902operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2903 2904template <class _T1, class _D1, class _T2, class _D2> 2905inline _LIBCPP_INLINE_VISIBILITY 2906bool 2907operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2908{ 2909 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2910 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2911 typedef typename common_type<_P1, _P2>::type _Vp; 2912 return less<_Vp>()(__x.get(), __y.get()); 2913} 2914 2915template <class _T1, class _D1, class _T2, class _D2> 2916inline _LIBCPP_INLINE_VISIBILITY 2917bool 2918operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2919 2920template <class _T1, class _D1, class _T2, class _D2> 2921inline _LIBCPP_INLINE_VISIBILITY 2922bool 2923operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2924 2925template <class _T1, class _D1, class _T2, class _D2> 2926inline _LIBCPP_INLINE_VISIBILITY 2927bool 2928operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2929 2930template <class _T1, class _D1> 2931inline _LIBCPP_INLINE_VISIBILITY 2932bool 2933operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2934{ 2935 return !__x; 2936} 2937 2938template <class _T1, class _D1> 2939inline _LIBCPP_INLINE_VISIBILITY 2940bool 2941operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2942{ 2943 return !__x; 2944} 2945 2946template <class _T1, class _D1> 2947inline _LIBCPP_INLINE_VISIBILITY 2948bool 2949operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2950{ 2951 return static_cast<bool>(__x); 2952} 2953 2954template <class _T1, class _D1> 2955inline _LIBCPP_INLINE_VISIBILITY 2956bool 2957operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2958{ 2959 return static_cast<bool>(__x); 2960} 2961 2962template <class _T1, class _D1> 2963inline _LIBCPP_INLINE_VISIBILITY 2964bool 2965operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2966{ 2967 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2968 return less<_P1>()(__x.get(), nullptr); 2969} 2970 2971template <class _T1, class _D1> 2972inline _LIBCPP_INLINE_VISIBILITY 2973bool 2974operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2975{ 2976 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2977 return less<_P1>()(nullptr, __x.get()); 2978} 2979 2980template <class _T1, class _D1> 2981inline _LIBCPP_INLINE_VISIBILITY 2982bool 2983operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2984{ 2985 return nullptr < __x; 2986} 2987 2988template <class _T1, class _D1> 2989inline _LIBCPP_INLINE_VISIBILITY 2990bool 2991operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2992{ 2993 return __x < nullptr; 2994} 2995 2996template <class _T1, class _D1> 2997inline _LIBCPP_INLINE_VISIBILITY 2998bool 2999operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3000{ 3001 return !(nullptr < __x); 3002} 3003 3004template <class _T1, class _D1> 3005inline _LIBCPP_INLINE_VISIBILITY 3006bool 3007operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3008{ 3009 return !(__x < nullptr); 3010} 3011 3012template <class _T1, class _D1> 3013inline _LIBCPP_INLINE_VISIBILITY 3014bool 3015operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3016{ 3017 return !(__x < nullptr); 3018} 3019 3020template <class _T1, class _D1> 3021inline _LIBCPP_INLINE_VISIBILITY 3022bool 3023operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3024{ 3025 return !(nullptr < __x); 3026} 3027 3028#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3029 3030template <class _Tp, class _Dp> 3031inline _LIBCPP_INLINE_VISIBILITY 3032unique_ptr<_Tp, _Dp> 3033move(unique_ptr<_Tp, _Dp>& __t) 3034{ 3035 return unique_ptr<_Tp, _Dp>(__rv<unique_ptr<_Tp, _Dp> >(__t)); 3036} 3037 3038#endif 3039 3040#if _LIBCPP_STD_VER > 11 3041 3042template<class _Tp> 3043struct __unique_if 3044{ 3045 typedef unique_ptr<_Tp> __unique_single; 3046}; 3047 3048template<class _Tp> 3049struct __unique_if<_Tp[]> 3050{ 3051 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 3052}; 3053 3054template<class _Tp, size_t _Np> 3055struct __unique_if<_Tp[_Np]> 3056{ 3057 typedef void __unique_array_known_bound; 3058}; 3059 3060template<class _Tp, class... _Args> 3061inline _LIBCPP_INLINE_VISIBILITY 3062typename __unique_if<_Tp>::__unique_single 3063make_unique(_Args&&... __args) 3064{ 3065 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 3066} 3067 3068template<class _Tp> 3069inline _LIBCPP_INLINE_VISIBILITY 3070typename __unique_if<_Tp>::__unique_array_unknown_bound 3071make_unique(size_t __n) 3072{ 3073 typedef typename remove_extent<_Tp>::type _Up; 3074 return unique_ptr<_Tp>(new _Up[__n]()); 3075} 3076 3077template<class _Tp, class... _Args> 3078 typename __unique_if<_Tp>::__unique_array_known_bound 3079 make_unique(_Args&&...) = delete; 3080 3081#endif // _LIBCPP_STD_VER > 11 3082 3083template <class _Tp, class _Dp> 3084#ifdef _LIBCPP_CXX03_LANG 3085struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 3086#else 3087struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 3088 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer>> 3089#endif 3090{ 3091 typedef unique_ptr<_Tp, _Dp> argument_type; 3092 typedef size_t result_type; 3093 _LIBCPP_INLINE_VISIBILITY 3094 result_type operator()(const argument_type& __ptr) const 3095 { 3096 typedef typename argument_type::pointer pointer; 3097 return hash<pointer>()(__ptr.get()); 3098 } 3099}; 3100 3101struct __destruct_n 3102{ 3103private: 3104 size_t size; 3105 3106 template <class _Tp> 3107 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 3108 {for (size_t __i = 0; __i < size; ++__i, ++__p) __p->~_Tp();} 3109 3110 template <class _Tp> 3111 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 3112 {} 3113 3114 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 3115 {++size;} 3116 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 3117 {} 3118 3119 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 3120 {size = __s;} 3121 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 3122 {} 3123public: 3124 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 3125 : size(__s) {} 3126 3127 template <class _Tp> 3128 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 3129 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3130 3131 template <class _Tp> 3132 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 3133 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3134 3135 template <class _Tp> 3136 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 3137 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3138}; 3139 3140template <class _Alloc> 3141class __allocator_destructor 3142{ 3143 typedef allocator_traits<_Alloc> __alloc_traits; 3144public: 3145 typedef typename __alloc_traits::pointer pointer; 3146 typedef typename __alloc_traits::size_type size_type; 3147private: 3148 _Alloc& __alloc_; 3149 size_type __s_; 3150public: 3151 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3152 _NOEXCEPT 3153 : __alloc_(__a), __s_(__s) {} 3154 _LIBCPP_INLINE_VISIBILITY 3155 void operator()(pointer __p) _NOEXCEPT 3156 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3157}; 3158 3159template <class _InputIterator, class _ForwardIterator> 3160_ForwardIterator 3161uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3162{ 3163 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3164#ifndef _LIBCPP_NO_EXCEPTIONS 3165 _ForwardIterator __s = __r; 3166 try 3167 { 3168#endif 3169 for (; __f != __l; ++__f, (void) ++__r) 3170 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3171#ifndef _LIBCPP_NO_EXCEPTIONS 3172 } 3173 catch (...) 3174 { 3175 for (; __s != __r; ++__s) 3176 __s->~value_type(); 3177 throw; 3178 } 3179#endif 3180 return __r; 3181} 3182 3183template <class _InputIterator, class _Size, class _ForwardIterator> 3184_ForwardIterator 3185uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3186{ 3187 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3188#ifndef _LIBCPP_NO_EXCEPTIONS 3189 _ForwardIterator __s = __r; 3190 try 3191 { 3192#endif 3193 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3194 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3195#ifndef _LIBCPP_NO_EXCEPTIONS 3196 } 3197 catch (...) 3198 { 3199 for (; __s != __r; ++__s) 3200 __s->~value_type(); 3201 throw; 3202 } 3203#endif 3204 return __r; 3205} 3206 3207template <class _ForwardIterator, class _Tp> 3208void 3209uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3210{ 3211 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3212#ifndef _LIBCPP_NO_EXCEPTIONS 3213 _ForwardIterator __s = __f; 3214 try 3215 { 3216#endif 3217 for (; __f != __l; ++__f) 3218 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3219#ifndef _LIBCPP_NO_EXCEPTIONS 3220 } 3221 catch (...) 3222 { 3223 for (; __s != __f; ++__s) 3224 __s->~value_type(); 3225 throw; 3226 } 3227#endif 3228} 3229 3230template <class _ForwardIterator, class _Size, class _Tp> 3231_ForwardIterator 3232uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3233{ 3234 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3235#ifndef _LIBCPP_NO_EXCEPTIONS 3236 _ForwardIterator __s = __f; 3237 try 3238 { 3239#endif 3240 for (; __n > 0; ++__f, (void) --__n) 3241 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3242#ifndef _LIBCPP_NO_EXCEPTIONS 3243 } 3244 catch (...) 3245 { 3246 for (; __s != __f; ++__s) 3247 __s->~value_type(); 3248 throw; 3249 } 3250#endif 3251 return __f; 3252} 3253 3254#if _LIBCPP_STD_VER > 14 3255 3256template <class _Tp> 3257inline _LIBCPP_INLINE_VISIBILITY 3258void destroy_at(_Tp* __loc) { 3259 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3260 __loc->~_Tp(); 3261} 3262 3263template <class _ForwardIterator> 3264inline _LIBCPP_INLINE_VISIBILITY 3265void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3266 for (; __first != __last; ++__first) 3267 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3268} 3269 3270template <class _ForwardIterator, class _Size> 3271inline _LIBCPP_INLINE_VISIBILITY 3272_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3273 for (; __n > 0; (void)++__first, --__n) 3274 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3275 return __first; 3276} 3277 3278template <class _ForwardIterator> 3279inline _LIBCPP_INLINE_VISIBILITY 3280void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3281 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3282 auto __idx = __first; 3283#ifndef _LIBCPP_NO_EXCEPTIONS 3284 try { 3285#endif 3286 for (; __idx != __last; ++__idx) 3287 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3288#ifndef _LIBCPP_NO_EXCEPTIONS 3289 } catch (...) { 3290 _VSTD::destroy(__first, __idx); 3291 throw; 3292 } 3293#endif 3294} 3295 3296template <class _ForwardIterator, class _Size> 3297inline _LIBCPP_INLINE_VISIBILITY 3298_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3299 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3300 auto __idx = __first; 3301#ifndef _LIBCPP_NO_EXCEPTIONS 3302 try { 3303#endif 3304 for (; __n > 0; (void)++__idx, --__n) 3305 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3306 return __idx; 3307#ifndef _LIBCPP_NO_EXCEPTIONS 3308 } catch (...) { 3309 _VSTD::destroy(__first, __idx); 3310 throw; 3311 } 3312#endif 3313} 3314 3315 3316template <class _ForwardIterator> 3317inline _LIBCPP_INLINE_VISIBILITY 3318void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3319 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3320 auto __idx = __first; 3321#ifndef _LIBCPP_NO_EXCEPTIONS 3322 try { 3323#endif 3324 for (; __idx != __last; ++__idx) 3325 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3326#ifndef _LIBCPP_NO_EXCEPTIONS 3327 } catch (...) { 3328 _VSTD::destroy(__first, __idx); 3329 throw; 3330 } 3331#endif 3332} 3333 3334template <class _ForwardIterator, class _Size> 3335inline _LIBCPP_INLINE_VISIBILITY 3336_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3337 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3338 auto __idx = __first; 3339#ifndef _LIBCPP_NO_EXCEPTIONS 3340 try { 3341#endif 3342 for (; __n > 0; (void)++__idx, --__n) 3343 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3344 return __idx; 3345#ifndef _LIBCPP_NO_EXCEPTIONS 3346 } catch (...) { 3347 _VSTD::destroy(__first, __idx); 3348 throw; 3349 } 3350#endif 3351} 3352 3353 3354template <class _InputIt, class _ForwardIt> 3355inline _LIBCPP_INLINE_VISIBILITY 3356_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3357 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3358 auto __idx = __first_res; 3359#ifndef _LIBCPP_NO_EXCEPTIONS 3360 try { 3361#endif 3362 for (; __first != __last; (void)++__idx, ++__first) 3363 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3364 return __idx; 3365#ifndef _LIBCPP_NO_EXCEPTIONS 3366 } catch (...) { 3367 _VSTD::destroy(__first_res, __idx); 3368 throw; 3369 } 3370#endif 3371} 3372 3373template <class _InputIt, class _Size, class _ForwardIt> 3374inline _LIBCPP_INLINE_VISIBILITY 3375pair<_InputIt, _ForwardIt> 3376uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3377 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3378 auto __idx = __first_res; 3379#ifndef _LIBCPP_NO_EXCEPTIONS 3380 try { 3381#endif 3382 for (; __n > 0; ++__idx, (void)++__first, --__n) 3383 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3384 return {__first, __idx}; 3385#ifndef _LIBCPP_NO_EXCEPTIONS 3386 } catch (...) { 3387 _VSTD::destroy(__first_res, __idx); 3388 throw; 3389 } 3390#endif 3391} 3392 3393 3394#endif // _LIBCPP_STD_VER > 14 3395 3396// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3397// should be sufficient for thread safety. 3398// See https://bugs.llvm.org/show_bug.cgi?id=22803 3399#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3400 && defined(__ATOMIC_RELAXED) \ 3401 && defined(__ATOMIC_ACQ_REL) 3402# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3403#elif !defined(__clang__) && defined(_GNUC_VER) && _GNUC_VER >= 407 3404# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3405#endif 3406 3407template <class _Tp> 3408inline _LIBCPP_INLINE_VISIBILITY _Tp 3409__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3410{ 3411#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3412 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3413#else 3414 return __t += 1; 3415#endif 3416} 3417 3418template <class _Tp> 3419inline _LIBCPP_INLINE_VISIBILITY _Tp 3420__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3421{ 3422#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3423 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3424#else 3425 return __t -= 1; 3426#endif 3427} 3428 3429class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3430 : public std::exception 3431{ 3432public: 3433 virtual ~bad_weak_ptr() _NOEXCEPT; 3434 virtual const char* what() const _NOEXCEPT; 3435}; 3436 3437_LIBCPP_NORETURN inline _LIBCPP_ALWAYS_INLINE 3438void __throw_bad_weak_ptr() 3439{ 3440#ifndef _LIBCPP_NO_EXCEPTIONS 3441 throw bad_weak_ptr(); 3442#else 3443 _VSTD::abort(); 3444#endif 3445} 3446 3447template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3448 3449class _LIBCPP_TYPE_VIS __shared_count 3450{ 3451 __shared_count(const __shared_count&); 3452 __shared_count& operator=(const __shared_count&); 3453 3454protected: 3455 long __shared_owners_; 3456 virtual ~__shared_count(); 3457private: 3458 virtual void __on_zero_shared() _NOEXCEPT = 0; 3459 3460public: 3461 _LIBCPP_INLINE_VISIBILITY 3462 explicit __shared_count(long __refs = 0) _NOEXCEPT 3463 : __shared_owners_(__refs) {} 3464 3465#if defined(_LIBCPP_BUILDING_MEMORY) && \ 3466 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3467 void __add_shared() _NOEXCEPT; 3468 bool __release_shared() _NOEXCEPT; 3469#else 3470 _LIBCPP_INLINE_VISIBILITY 3471 void __add_shared() _NOEXCEPT { 3472 __libcpp_atomic_refcount_increment(__shared_owners_); 3473 } 3474 _LIBCPP_INLINE_VISIBILITY 3475 bool __release_shared() _NOEXCEPT { 3476 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3477 __on_zero_shared(); 3478 return true; 3479 } 3480 return false; 3481 } 3482#endif 3483 _LIBCPP_INLINE_VISIBILITY 3484 long use_count() const _NOEXCEPT { 3485 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3486 } 3487}; 3488 3489class _LIBCPP_TYPE_VIS __shared_weak_count 3490 : private __shared_count 3491{ 3492 long __shared_weak_owners_; 3493 3494public: 3495 _LIBCPP_INLINE_VISIBILITY 3496 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3497 : __shared_count(__refs), 3498 __shared_weak_owners_(__refs) {} 3499protected: 3500 virtual ~__shared_weak_count(); 3501 3502public: 3503#if defined(_LIBCPP_BUILDING_MEMORY) && \ 3504 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3505 void __add_shared() _NOEXCEPT; 3506 void __add_weak() _NOEXCEPT; 3507 void __release_shared() _NOEXCEPT; 3508#else 3509 _LIBCPP_INLINE_VISIBILITY 3510 void __add_shared() _NOEXCEPT { 3511 __shared_count::__add_shared(); 3512 } 3513 _LIBCPP_INLINE_VISIBILITY 3514 void __add_weak() _NOEXCEPT { 3515 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3516 } 3517 _LIBCPP_INLINE_VISIBILITY 3518 void __release_shared() _NOEXCEPT { 3519 if (__shared_count::__release_shared()) 3520 __release_weak(); 3521 } 3522#endif 3523 void __release_weak() _NOEXCEPT; 3524 _LIBCPP_INLINE_VISIBILITY 3525 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3526 __shared_weak_count* lock() _NOEXCEPT; 3527 3528 // Define the function out only if we build static libc++ without RTTI. 3529 // Otherwise we may break clients who need to compile their projects with 3530 // -fno-rtti and yet link against a libc++.dylib compiled 3531 // without -fno-rtti. 3532#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3533 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3534#endif 3535private: 3536 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3537}; 3538 3539template <class _Tp, class _Dp, class _Alloc> 3540class __shared_ptr_pointer 3541 : public __shared_weak_count 3542{ 3543 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3544public: 3545 _LIBCPP_INLINE_VISIBILITY 3546 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3547 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3548 3549#ifndef _LIBCPP_NO_RTTI 3550 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3551#endif 3552 3553private: 3554 virtual void __on_zero_shared() _NOEXCEPT; 3555 virtual void __on_zero_shared_weak() _NOEXCEPT; 3556}; 3557 3558#ifndef _LIBCPP_NO_RTTI 3559 3560template <class _Tp, class _Dp, class _Alloc> 3561const void* 3562__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3563{ 3564 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3565} 3566 3567#endif // _LIBCPP_NO_RTTI 3568 3569template <class _Tp, class _Dp, class _Alloc> 3570void 3571__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3572{ 3573 __data_.first().second()(__data_.first().first()); 3574 __data_.first().second().~_Dp(); 3575} 3576 3577template <class _Tp, class _Dp, class _Alloc> 3578void 3579__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3580{ 3581 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3582 typedef allocator_traits<_Al> _ATraits; 3583 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3584 3585 _Al __a(__data_.second()); 3586 __data_.second().~_Alloc(); 3587 __a.deallocate(_PTraits::pointer_to(*this), 1); 3588} 3589 3590template <class _Tp, class _Alloc> 3591class __shared_ptr_emplace 3592 : public __shared_weak_count 3593{ 3594 __compressed_pair<_Alloc, _Tp> __data_; 3595public: 3596#ifndef _LIBCPP_HAS_NO_VARIADICS 3597 3598 _LIBCPP_INLINE_VISIBILITY 3599 __shared_ptr_emplace(_Alloc __a) 3600 : __data_(_VSTD::move(__a)) {} 3601 3602 template <class ..._Args> 3603 _LIBCPP_INLINE_VISIBILITY 3604 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3605 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3606 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3607 3608#else // _LIBCPP_HAS_NO_VARIADICS 3609 3610 _LIBCPP_INLINE_VISIBILITY 3611 __shared_ptr_emplace(_Alloc __a) 3612 : __data_(__a) {} 3613 3614 template <class _A0> 3615 _LIBCPP_INLINE_VISIBILITY 3616 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3617 : __data_(__a, _Tp(__a0)) {} 3618 3619 template <class _A0, class _A1> 3620 _LIBCPP_INLINE_VISIBILITY 3621 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3622 : __data_(__a, _Tp(__a0, __a1)) {} 3623 3624 template <class _A0, class _A1, class _A2> 3625 _LIBCPP_INLINE_VISIBILITY 3626 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3627 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3628 3629#endif // _LIBCPP_HAS_NO_VARIADICS 3630 3631private: 3632 virtual void __on_zero_shared() _NOEXCEPT; 3633 virtual void __on_zero_shared_weak() _NOEXCEPT; 3634public: 3635 _LIBCPP_INLINE_VISIBILITY 3636 _Tp* get() _NOEXCEPT {return &__data_.second();} 3637}; 3638 3639template <class _Tp, class _Alloc> 3640void 3641__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3642{ 3643 __data_.second().~_Tp(); 3644} 3645 3646template <class _Tp, class _Alloc> 3647void 3648__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3649{ 3650 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3651 typedef allocator_traits<_Al> _ATraits; 3652 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3653 _Al __a(__data_.first()); 3654 __data_.first().~_Alloc(); 3655 __a.deallocate(_PTraits::pointer_to(*this), 1); 3656} 3657 3658struct __shared_ptr_dummy_rebind_allocator_type; 3659template <> 3660class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3661{ 3662public: 3663 template <class _Other> 3664 struct rebind 3665 { 3666 typedef allocator<_Other> other; 3667 }; 3668}; 3669 3670template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3671 3672template<class _Tp> 3673class _LIBCPP_TEMPLATE_VIS shared_ptr 3674{ 3675public: 3676 typedef _Tp element_type; 3677 3678#if _LIBCPP_STD_VER > 14 3679 typedef weak_ptr<_Tp> weak_type; 3680#endif 3681private: 3682 element_type* __ptr_; 3683 __shared_weak_count* __cntrl_; 3684 3685 struct __nat {int __for_bool_;}; 3686public: 3687 _LIBCPP_INLINE_VISIBILITY 3688 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3689 _LIBCPP_INLINE_VISIBILITY 3690 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3691 template<class _Yp> 3692 explicit shared_ptr(_Yp* __p, 3693 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3694 template<class _Yp, class _Dp> 3695 shared_ptr(_Yp* __p, _Dp __d, 3696 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3697 template<class _Yp, class _Dp, class _Alloc> 3698 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3699 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3700 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3701 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3702 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3703 _LIBCPP_INLINE_VISIBILITY 3704 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3705 template<class _Yp> 3706 _LIBCPP_INLINE_VISIBILITY 3707 shared_ptr(const shared_ptr<_Yp>& __r, 3708 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3709 _NOEXCEPT; 3710#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3711 _LIBCPP_INLINE_VISIBILITY 3712 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3713 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3714 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3715 _NOEXCEPT; 3716#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3717 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3718 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3719#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3720#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3721 template<class _Yp> 3722 shared_ptr(auto_ptr<_Yp>&& __r, 3723 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3724#else 3725 template<class _Yp> 3726 shared_ptr(auto_ptr<_Yp> __r, 3727 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3728#endif 3729#endif 3730#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3731 template <class _Yp, class _Dp> 3732 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3733 typename enable_if 3734 < 3735 !is_lvalue_reference<_Dp>::value && 3736 !is_array<_Yp>::value && 3737 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3738 __nat 3739 >::type = __nat()); 3740 template <class _Yp, class _Dp> 3741 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3742 typename enable_if 3743 < 3744 is_lvalue_reference<_Dp>::value && 3745 !is_array<_Yp>::value && 3746 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3747 __nat 3748 >::type = __nat()); 3749#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3750 template <class _Yp, class _Dp> 3751 shared_ptr(unique_ptr<_Yp, _Dp>, 3752 typename enable_if 3753 < 3754 !is_lvalue_reference<_Dp>::value && 3755 !is_array<_Yp>::value && 3756 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3757 __nat 3758 >::type = __nat()); 3759 template <class _Yp, class _Dp> 3760 shared_ptr(unique_ptr<_Yp, _Dp>, 3761 typename enable_if 3762 < 3763 is_lvalue_reference<_Dp>::value && 3764 !is_array<_Yp>::value && 3765 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3766 __nat 3767 >::type = __nat()); 3768#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3769 3770 ~shared_ptr(); 3771 3772 _LIBCPP_INLINE_VISIBILITY 3773 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3774 template<class _Yp> 3775 typename enable_if 3776 < 3777 is_convertible<_Yp*, element_type*>::value, 3778 shared_ptr& 3779 >::type 3780 _LIBCPP_INLINE_VISIBILITY 3781 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3782#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3783 _LIBCPP_INLINE_VISIBILITY 3784 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3785 template<class _Yp> 3786 typename enable_if 3787 < 3788 is_convertible<_Yp*, element_type*>::value, 3789 shared_ptr<_Tp>& 3790 >::type 3791 _LIBCPP_INLINE_VISIBILITY 3792 operator=(shared_ptr<_Yp>&& __r); 3793#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3794 template<class _Yp> 3795 _LIBCPP_INLINE_VISIBILITY 3796 typename enable_if 3797 < 3798 !is_array<_Yp>::value && 3799 is_convertible<_Yp*, element_type*>::value, 3800 shared_ptr 3801 >::type& 3802 operator=(auto_ptr<_Yp>&& __r); 3803#endif 3804#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3805#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3806 template<class _Yp> 3807 _LIBCPP_INLINE_VISIBILITY 3808 typename enable_if 3809 < 3810 !is_array<_Yp>::value && 3811 is_convertible<_Yp*, element_type*>::value, 3812 shared_ptr& 3813 >::type 3814 operator=(auto_ptr<_Yp> __r); 3815#endif 3816#endif 3817 template <class _Yp, class _Dp> 3818 typename enable_if 3819 < 3820 !is_array<_Yp>::value && 3821 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3822 shared_ptr& 3823 >::type 3824#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3825 _LIBCPP_INLINE_VISIBILITY 3826 operator=(unique_ptr<_Yp, _Dp>&& __r); 3827#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3828 _LIBCPP_INLINE_VISIBILITY 3829 operator=(unique_ptr<_Yp, _Dp> __r); 3830#endif 3831 3832 _LIBCPP_INLINE_VISIBILITY 3833 void swap(shared_ptr& __r) _NOEXCEPT; 3834 _LIBCPP_INLINE_VISIBILITY 3835 void reset() _NOEXCEPT; 3836 template<class _Yp> 3837 typename enable_if 3838 < 3839 is_convertible<_Yp*, element_type*>::value, 3840 void 3841 >::type 3842 _LIBCPP_INLINE_VISIBILITY 3843 reset(_Yp* __p); 3844 template<class _Yp, class _Dp> 3845 typename enable_if 3846 < 3847 is_convertible<_Yp*, element_type*>::value, 3848 void 3849 >::type 3850 _LIBCPP_INLINE_VISIBILITY 3851 reset(_Yp* __p, _Dp __d); 3852 template<class _Yp, class _Dp, class _Alloc> 3853 typename enable_if 3854 < 3855 is_convertible<_Yp*, element_type*>::value, 3856 void 3857 >::type 3858 _LIBCPP_INLINE_VISIBILITY 3859 reset(_Yp* __p, _Dp __d, _Alloc __a); 3860 3861 _LIBCPP_INLINE_VISIBILITY 3862 element_type* get() const _NOEXCEPT {return __ptr_;} 3863 _LIBCPP_INLINE_VISIBILITY 3864 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3865 {return *__ptr_;} 3866 _LIBCPP_INLINE_VISIBILITY 3867 element_type* operator->() const _NOEXCEPT {return __ptr_;} 3868 _LIBCPP_INLINE_VISIBILITY 3869 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3870 _LIBCPP_INLINE_VISIBILITY 3871 bool unique() const _NOEXCEPT {return use_count() == 1;} 3872 _LIBCPP_INLINE_VISIBILITY 3873 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3874 template <class _Up> 3875 _LIBCPP_INLINE_VISIBILITY 3876 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3877 {return __cntrl_ < __p.__cntrl_;} 3878 template <class _Up> 3879 _LIBCPP_INLINE_VISIBILITY 3880 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3881 {return __cntrl_ < __p.__cntrl_;} 3882 _LIBCPP_INLINE_VISIBILITY 3883 bool 3884 __owner_equivalent(const shared_ptr& __p) const 3885 {return __cntrl_ == __p.__cntrl_;} 3886 3887#ifndef _LIBCPP_NO_RTTI 3888 template <class _Dp> 3889 _LIBCPP_INLINE_VISIBILITY 3890 _Dp* __get_deleter() const _NOEXCEPT 3891 {return (_Dp*)(__cntrl_ ? __cntrl_->__get_deleter(typeid(_Dp)) : 0);} 3892#endif // _LIBCPP_NO_RTTI 3893 3894#ifndef _LIBCPP_HAS_NO_VARIADICS 3895 3896 template<class ..._Args> 3897 static 3898 shared_ptr<_Tp> 3899 make_shared(_Args&& ...__args); 3900 3901 template<class _Alloc, class ..._Args> 3902 static 3903 shared_ptr<_Tp> 3904 allocate_shared(const _Alloc& __a, _Args&& ...__args); 3905 3906#else // _LIBCPP_HAS_NO_VARIADICS 3907 3908 static shared_ptr<_Tp> make_shared(); 3909 3910 template<class _A0> 3911 static shared_ptr<_Tp> make_shared(_A0&); 3912 3913 template<class _A0, class _A1> 3914 static shared_ptr<_Tp> make_shared(_A0&, _A1&); 3915 3916 template<class _A0, class _A1, class _A2> 3917 static shared_ptr<_Tp> make_shared(_A0&, _A1&, _A2&); 3918 3919 template<class _Alloc> 3920 static shared_ptr<_Tp> 3921 allocate_shared(const _Alloc& __a); 3922 3923 template<class _Alloc, class _A0> 3924 static shared_ptr<_Tp> 3925 allocate_shared(const _Alloc& __a, _A0& __a0); 3926 3927 template<class _Alloc, class _A0, class _A1> 3928 static shared_ptr<_Tp> 3929 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1); 3930 3931 template<class _Alloc, class _A0, class _A1, class _A2> 3932 static shared_ptr<_Tp> 3933 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2); 3934 3935#endif // _LIBCPP_HAS_NO_VARIADICS 3936 3937private: 3938 template <class _Yp, bool = is_function<_Yp>::value> 3939 struct __shared_ptr_default_allocator 3940 { 3941 typedef allocator<_Yp> type; 3942 }; 3943 3944 template <class _Yp> 3945 struct __shared_ptr_default_allocator<_Yp, true> 3946 { 3947 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 3948 }; 3949 3950 template <class _Yp, class _OrigPtr> 3951 _LIBCPP_INLINE_VISIBILITY 3952 typename enable_if<is_convertible<_OrigPtr*, 3953 const enable_shared_from_this<_Yp>* 3954 >::value, 3955 void>::type 3956 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3957 _OrigPtr* __ptr) _NOEXCEPT 3958 { 3959 typedef typename remove_cv<_Yp>::type _RawYp; 3960 if (__e && __e->__weak_this_.expired()) 3961 { 3962 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3963 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3964 } 3965 } 3966 3967 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 3968 3969 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3970 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3971}; 3972 3973 3974template<class _Tp> 3975inline 3976_LIBCPP_CONSTEXPR 3977shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3978 : __ptr_(0), 3979 __cntrl_(0) 3980{ 3981} 3982 3983template<class _Tp> 3984inline 3985_LIBCPP_CONSTEXPR 3986shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3987 : __ptr_(0), 3988 __cntrl_(0) 3989{ 3990} 3991 3992template<class _Tp> 3993template<class _Yp> 3994shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3995 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3996 : __ptr_(__p) 3997{ 3998 unique_ptr<_Yp> __hold(__p); 3999 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4000 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk; 4001 __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT()); 4002 __hold.release(); 4003 __enable_weak_this(__p, __p); 4004} 4005 4006template<class _Tp> 4007template<class _Yp, class _Dp> 4008shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 4009 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4010 : __ptr_(__p) 4011{ 4012#ifndef _LIBCPP_NO_EXCEPTIONS 4013 try 4014 { 4015#endif // _LIBCPP_NO_EXCEPTIONS 4016 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4017 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4018 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 4019 __enable_weak_this(__p, __p); 4020#ifndef _LIBCPP_NO_EXCEPTIONS 4021 } 4022 catch (...) 4023 { 4024 __d(__p); 4025 throw; 4026 } 4027#endif // _LIBCPP_NO_EXCEPTIONS 4028} 4029 4030template<class _Tp> 4031template<class _Dp> 4032shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 4033 : __ptr_(0) 4034{ 4035#ifndef _LIBCPP_NO_EXCEPTIONS 4036 try 4037 { 4038#endif // _LIBCPP_NO_EXCEPTIONS 4039 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 4040 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 4041 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 4042#ifndef _LIBCPP_NO_EXCEPTIONS 4043 } 4044 catch (...) 4045 { 4046 __d(__p); 4047 throw; 4048 } 4049#endif // _LIBCPP_NO_EXCEPTIONS 4050} 4051 4052template<class _Tp> 4053template<class _Yp, class _Dp, class _Alloc> 4054shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 4055 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4056 : __ptr_(__p) 4057{ 4058#ifndef _LIBCPP_NO_EXCEPTIONS 4059 try 4060 { 4061#endif // _LIBCPP_NO_EXCEPTIONS 4062 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 4063 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4064 typedef __allocator_destructor<_A2> _D2; 4065 _A2 __a2(__a); 4066 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4067 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4068 _CntrlBlk(__p, __d, __a); 4069 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4070 __enable_weak_this(__p, __p); 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 _Dp, class _Alloc> 4083shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 4084 : __ptr_(0) 4085{ 4086#ifndef _LIBCPP_NO_EXCEPTIONS 4087 try 4088 { 4089#endif // _LIBCPP_NO_EXCEPTIONS 4090 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 4091 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4092 typedef __allocator_destructor<_A2> _D2; 4093 _A2 __a2(__a); 4094 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4095 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4096 _CntrlBlk(__p, __d, __a); 4097 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4098#ifndef _LIBCPP_NO_EXCEPTIONS 4099 } 4100 catch (...) 4101 { 4102 __d(__p); 4103 throw; 4104 } 4105#endif // _LIBCPP_NO_EXCEPTIONS 4106} 4107 4108template<class _Tp> 4109template<class _Yp> 4110inline 4111shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 4112 : __ptr_(__p), 4113 __cntrl_(__r.__cntrl_) 4114{ 4115 if (__cntrl_) 4116 __cntrl_->__add_shared(); 4117} 4118 4119template<class _Tp> 4120inline 4121shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 4122 : __ptr_(__r.__ptr_), 4123 __cntrl_(__r.__cntrl_) 4124{ 4125 if (__cntrl_) 4126 __cntrl_->__add_shared(); 4127} 4128 4129template<class _Tp> 4130template<class _Yp> 4131inline 4132shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4133 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4134 _NOEXCEPT 4135 : __ptr_(__r.__ptr_), 4136 __cntrl_(__r.__cntrl_) 4137{ 4138 if (__cntrl_) 4139 __cntrl_->__add_shared(); 4140} 4141 4142#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4143 4144template<class _Tp> 4145inline 4146shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4147 : __ptr_(__r.__ptr_), 4148 __cntrl_(__r.__cntrl_) 4149{ 4150 __r.__ptr_ = 0; 4151 __r.__cntrl_ = 0; 4152} 4153 4154template<class _Tp> 4155template<class _Yp> 4156inline 4157shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4158 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4159 _NOEXCEPT 4160 : __ptr_(__r.__ptr_), 4161 __cntrl_(__r.__cntrl_) 4162{ 4163 __r.__ptr_ = 0; 4164 __r.__cntrl_ = 0; 4165} 4166 4167#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4168 4169#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4170template<class _Tp> 4171template<class _Yp> 4172#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4173shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4174#else 4175shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4176#endif 4177 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4178 : __ptr_(__r.get()) 4179{ 4180 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4181 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4182 __enable_weak_this(__r.get(), __r.get()); 4183 __r.release(); 4184} 4185#endif 4186 4187template<class _Tp> 4188template <class _Yp, class _Dp> 4189#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4190shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4191#else 4192shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4193#endif 4194 typename enable_if 4195 < 4196 !is_lvalue_reference<_Dp>::value && 4197 !is_array<_Yp>::value && 4198 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4199 __nat 4200 >::type) 4201 : __ptr_(__r.get()) 4202{ 4203#if _LIBCPP_STD_VER > 11 4204 if (__ptr_ == nullptr) 4205 __cntrl_ = nullptr; 4206 else 4207#endif 4208 { 4209 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4210 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4211 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 4212 __enable_weak_this(__r.get(), __r.get()); 4213 } 4214 __r.release(); 4215} 4216 4217template<class _Tp> 4218template <class _Yp, class _Dp> 4219#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4220shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4221#else 4222shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4223#endif 4224 typename enable_if 4225 < 4226 is_lvalue_reference<_Dp>::value && 4227 !is_array<_Yp>::value && 4228 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4229 __nat 4230 >::type) 4231 : __ptr_(__r.get()) 4232{ 4233#if _LIBCPP_STD_VER > 11 4234 if (__ptr_ == nullptr) 4235 __cntrl_ = nullptr; 4236 else 4237#endif 4238 { 4239 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4240 typedef __shared_ptr_pointer<_Yp*, 4241 reference_wrapper<typename remove_reference<_Dp>::type>, 4242 _AllocT > _CntrlBlk; 4243 __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT()); 4244 __enable_weak_this(__r.get(), __r.get()); 4245 } 4246 __r.release(); 4247} 4248 4249#ifndef _LIBCPP_HAS_NO_VARIADICS 4250 4251template<class _Tp> 4252template<class ..._Args> 4253shared_ptr<_Tp> 4254shared_ptr<_Tp>::make_shared(_Args&& ...__args) 4255{ 4256 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4257 typedef allocator<_CntrlBlk> _A2; 4258 typedef __allocator_destructor<_A2> _D2; 4259 _A2 __a2; 4260 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4261 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4262 shared_ptr<_Tp> __r; 4263 __r.__ptr_ = __hold2.get()->get(); 4264 __r.__cntrl_ = __hold2.release(); 4265 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4266 return __r; 4267} 4268 4269template<class _Tp> 4270template<class _Alloc, class ..._Args> 4271shared_ptr<_Tp> 4272shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args) 4273{ 4274 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4275 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4276 typedef __allocator_destructor<_A2> _D2; 4277 _A2 __a2(__a); 4278 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4279 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4280 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4281 shared_ptr<_Tp> __r; 4282 __r.__ptr_ = __hold2.get()->get(); 4283 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4284 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4285 return __r; 4286} 4287 4288#else // _LIBCPP_HAS_NO_VARIADICS 4289 4290template<class _Tp> 4291shared_ptr<_Tp> 4292shared_ptr<_Tp>::make_shared() 4293{ 4294 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4295 typedef allocator<_CntrlBlk> _Alloc2; 4296 typedef __allocator_destructor<_Alloc2> _D2; 4297 _Alloc2 __alloc2; 4298 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4299 ::new(__hold2.get()) _CntrlBlk(__alloc2); 4300 shared_ptr<_Tp> __r; 4301 __r.__ptr_ = __hold2.get()->get(); 4302 __r.__cntrl_ = __hold2.release(); 4303 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4304 return __r; 4305} 4306 4307template<class _Tp> 4308template<class _A0> 4309shared_ptr<_Tp> 4310shared_ptr<_Tp>::make_shared(_A0& __a0) 4311{ 4312 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4313 typedef allocator<_CntrlBlk> _Alloc2; 4314 typedef __allocator_destructor<_Alloc2> _D2; 4315 _Alloc2 __alloc2; 4316 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4317 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0); 4318 shared_ptr<_Tp> __r; 4319 __r.__ptr_ = __hold2.get()->get(); 4320 __r.__cntrl_ = __hold2.release(); 4321 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4322 return __r; 4323} 4324 4325template<class _Tp> 4326template<class _A0, class _A1> 4327shared_ptr<_Tp> 4328shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1) 4329{ 4330 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4331 typedef allocator<_CntrlBlk> _Alloc2; 4332 typedef __allocator_destructor<_Alloc2> _D2; 4333 _Alloc2 __alloc2; 4334 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4335 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1); 4336 shared_ptr<_Tp> __r; 4337 __r.__ptr_ = __hold2.get()->get(); 4338 __r.__cntrl_ = __hold2.release(); 4339 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4340 return __r; 4341} 4342 4343template<class _Tp> 4344template<class _A0, class _A1, class _A2> 4345shared_ptr<_Tp> 4346shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4347{ 4348 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4349 typedef allocator<_CntrlBlk> _Alloc2; 4350 typedef __allocator_destructor<_Alloc2> _D2; 4351 _Alloc2 __alloc2; 4352 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4353 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1, __a2); 4354 shared_ptr<_Tp> __r; 4355 __r.__ptr_ = __hold2.get()->get(); 4356 __r.__cntrl_ = __hold2.release(); 4357 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4358 return __r; 4359} 4360 4361template<class _Tp> 4362template<class _Alloc> 4363shared_ptr<_Tp> 4364shared_ptr<_Tp>::allocate_shared(const _Alloc& __a) 4365{ 4366 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4367 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4368 typedef __allocator_destructor<_Alloc2> _D2; 4369 _Alloc2 __alloc2(__a); 4370 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4371 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4372 _CntrlBlk(__a); 4373 shared_ptr<_Tp> __r; 4374 __r.__ptr_ = __hold2.get()->get(); 4375 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4376 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4377 return __r; 4378} 4379 4380template<class _Tp> 4381template<class _Alloc, class _A0> 4382shared_ptr<_Tp> 4383shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0) 4384{ 4385 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4386 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4387 typedef __allocator_destructor<_Alloc2> _D2; 4388 _Alloc2 __alloc2(__a); 4389 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4390 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4391 _CntrlBlk(__a, __a0); 4392 shared_ptr<_Tp> __r; 4393 __r.__ptr_ = __hold2.get()->get(); 4394 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4395 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4396 return __r; 4397} 4398 4399template<class _Tp> 4400template<class _Alloc, class _A0, class _A1> 4401shared_ptr<_Tp> 4402shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4403{ 4404 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4405 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4406 typedef __allocator_destructor<_Alloc2> _D2; 4407 _Alloc2 __alloc2(__a); 4408 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4409 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4410 _CntrlBlk(__a, __a0, __a1); 4411 shared_ptr<_Tp> __r; 4412 __r.__ptr_ = __hold2.get()->get(); 4413 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4414 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4415 return __r; 4416} 4417 4418template<class _Tp> 4419template<class _Alloc, class _A0, class _A1, class _A2> 4420shared_ptr<_Tp> 4421shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4422{ 4423 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4424 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4425 typedef __allocator_destructor<_Alloc2> _D2; 4426 _Alloc2 __alloc2(__a); 4427 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4428 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4429 _CntrlBlk(__a, __a0, __a1, __a2); 4430 shared_ptr<_Tp> __r; 4431 __r.__ptr_ = __hold2.get()->get(); 4432 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4433 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4434 return __r; 4435} 4436 4437#endif // _LIBCPP_HAS_NO_VARIADICS 4438 4439template<class _Tp> 4440shared_ptr<_Tp>::~shared_ptr() 4441{ 4442 if (__cntrl_) 4443 __cntrl_->__release_shared(); 4444} 4445 4446template<class _Tp> 4447inline 4448shared_ptr<_Tp>& 4449shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4450{ 4451 shared_ptr(__r).swap(*this); 4452 return *this; 4453} 4454 4455template<class _Tp> 4456template<class _Yp> 4457inline 4458typename enable_if 4459< 4460 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4461 shared_ptr<_Tp>& 4462>::type 4463shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4464{ 4465 shared_ptr(__r).swap(*this); 4466 return *this; 4467} 4468 4469#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4470 4471template<class _Tp> 4472inline 4473shared_ptr<_Tp>& 4474shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4475{ 4476 shared_ptr(_VSTD::move(__r)).swap(*this); 4477 return *this; 4478} 4479 4480template<class _Tp> 4481template<class _Yp> 4482inline 4483typename enable_if 4484< 4485 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4486 shared_ptr<_Tp>& 4487>::type 4488shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4489{ 4490 shared_ptr(_VSTD::move(__r)).swap(*this); 4491 return *this; 4492} 4493 4494#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4495template<class _Tp> 4496template<class _Yp> 4497inline 4498typename enable_if 4499< 4500 !is_array<_Yp>::value && 4501 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4502 shared_ptr<_Tp> 4503>::type& 4504shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4505{ 4506 shared_ptr(_VSTD::move(__r)).swap(*this); 4507 return *this; 4508} 4509#endif 4510 4511template<class _Tp> 4512template <class _Yp, class _Dp> 4513inline 4514typename enable_if 4515< 4516 !is_array<_Yp>::value && 4517 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4518 typename shared_ptr<_Tp>::element_type*>::value, 4519 shared_ptr<_Tp>& 4520>::type 4521shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4522{ 4523 shared_ptr(_VSTD::move(__r)).swap(*this); 4524 return *this; 4525} 4526 4527#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4528 4529#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4530template<class _Tp> 4531template<class _Yp> 4532inline _LIBCPP_INLINE_VISIBILITY 4533typename enable_if 4534< 4535 !is_array<_Yp>::value && 4536 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4537 shared_ptr<_Tp>& 4538>::type 4539shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4540{ 4541 shared_ptr(__r).swap(*this); 4542 return *this; 4543} 4544#endif 4545 4546template<class _Tp> 4547template <class _Yp, class _Dp> 4548inline _LIBCPP_INLINE_VISIBILITY 4549typename enable_if 4550< 4551 !is_array<_Yp>::value && 4552 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4553 typename shared_ptr<_Tp>::element_type*>::value, 4554 shared_ptr<_Tp>& 4555>::type 4556shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4557{ 4558 shared_ptr(_VSTD::move(__r)).swap(*this); 4559 return *this; 4560} 4561 4562#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4563 4564template<class _Tp> 4565inline 4566void 4567shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4568{ 4569 _VSTD::swap(__ptr_, __r.__ptr_); 4570 _VSTD::swap(__cntrl_, __r.__cntrl_); 4571} 4572 4573template<class _Tp> 4574inline 4575void 4576shared_ptr<_Tp>::reset() _NOEXCEPT 4577{ 4578 shared_ptr().swap(*this); 4579} 4580 4581template<class _Tp> 4582template<class _Yp> 4583inline 4584typename enable_if 4585< 4586 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4587 void 4588>::type 4589shared_ptr<_Tp>::reset(_Yp* __p) 4590{ 4591 shared_ptr(__p).swap(*this); 4592} 4593 4594template<class _Tp> 4595template<class _Yp, class _Dp> 4596inline 4597typename enable_if 4598< 4599 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4600 void 4601>::type 4602shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4603{ 4604 shared_ptr(__p, __d).swap(*this); 4605} 4606 4607template<class _Tp> 4608template<class _Yp, class _Dp, class _Alloc> 4609inline 4610typename enable_if 4611< 4612 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4613 void 4614>::type 4615shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4616{ 4617 shared_ptr(__p, __d, __a).swap(*this); 4618} 4619 4620#ifndef _LIBCPP_HAS_NO_VARIADICS 4621 4622template<class _Tp, class ..._Args> 4623inline _LIBCPP_INLINE_VISIBILITY 4624typename enable_if 4625< 4626 !is_array<_Tp>::value, 4627 shared_ptr<_Tp> 4628>::type 4629make_shared(_Args&& ...__args) 4630{ 4631 return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...); 4632} 4633 4634template<class _Tp, class _Alloc, class ..._Args> 4635inline _LIBCPP_INLINE_VISIBILITY 4636typename enable_if 4637< 4638 !is_array<_Tp>::value, 4639 shared_ptr<_Tp> 4640>::type 4641allocate_shared(const _Alloc& __a, _Args&& ...__args) 4642{ 4643 return shared_ptr<_Tp>::allocate_shared(__a, _VSTD::forward<_Args>(__args)...); 4644} 4645 4646#else // _LIBCPP_HAS_NO_VARIADICS 4647 4648template<class _Tp> 4649inline _LIBCPP_INLINE_VISIBILITY 4650shared_ptr<_Tp> 4651make_shared() 4652{ 4653 return shared_ptr<_Tp>::make_shared(); 4654} 4655 4656template<class _Tp, class _A0> 4657inline _LIBCPP_INLINE_VISIBILITY 4658shared_ptr<_Tp> 4659make_shared(_A0& __a0) 4660{ 4661 return shared_ptr<_Tp>::make_shared(__a0); 4662} 4663 4664template<class _Tp, class _A0, class _A1> 4665inline _LIBCPP_INLINE_VISIBILITY 4666shared_ptr<_Tp> 4667make_shared(_A0& __a0, _A1& __a1) 4668{ 4669 return shared_ptr<_Tp>::make_shared(__a0, __a1); 4670} 4671 4672template<class _Tp, class _A0, class _A1, class _A2> 4673inline _LIBCPP_INLINE_VISIBILITY 4674shared_ptr<_Tp> 4675make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4676{ 4677 return shared_ptr<_Tp>::make_shared(__a0, __a1, __a2); 4678} 4679 4680template<class _Tp, class _Alloc> 4681inline _LIBCPP_INLINE_VISIBILITY 4682shared_ptr<_Tp> 4683allocate_shared(const _Alloc& __a) 4684{ 4685 return shared_ptr<_Tp>::allocate_shared(__a); 4686} 4687 4688template<class _Tp, class _Alloc, class _A0> 4689inline _LIBCPP_INLINE_VISIBILITY 4690shared_ptr<_Tp> 4691allocate_shared(const _Alloc& __a, _A0& __a0) 4692{ 4693 return shared_ptr<_Tp>::allocate_shared(__a, __a0); 4694} 4695 4696template<class _Tp, class _Alloc, class _A0, class _A1> 4697inline _LIBCPP_INLINE_VISIBILITY 4698shared_ptr<_Tp> 4699allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4700{ 4701 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1); 4702} 4703 4704template<class _Tp, class _Alloc, class _A0, class _A1, class _A2> 4705inline _LIBCPP_INLINE_VISIBILITY 4706shared_ptr<_Tp> 4707allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4708{ 4709 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1, __a2); 4710} 4711 4712#endif // _LIBCPP_HAS_NO_VARIADICS 4713 4714template<class _Tp, class _Up> 4715inline _LIBCPP_INLINE_VISIBILITY 4716bool 4717operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4718{ 4719 return __x.get() == __y.get(); 4720} 4721 4722template<class _Tp, class _Up> 4723inline _LIBCPP_INLINE_VISIBILITY 4724bool 4725operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4726{ 4727 return !(__x == __y); 4728} 4729 4730template<class _Tp, class _Up> 4731inline _LIBCPP_INLINE_VISIBILITY 4732bool 4733operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4734{ 4735 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4736 return less<_Vp>()(__x.get(), __y.get()); 4737} 4738 4739template<class _Tp, class _Up> 4740inline _LIBCPP_INLINE_VISIBILITY 4741bool 4742operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4743{ 4744 return __y < __x; 4745} 4746 4747template<class _Tp, class _Up> 4748inline _LIBCPP_INLINE_VISIBILITY 4749bool 4750operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4751{ 4752 return !(__y < __x); 4753} 4754 4755template<class _Tp, class _Up> 4756inline _LIBCPP_INLINE_VISIBILITY 4757bool 4758operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4759{ 4760 return !(__x < __y); 4761} 4762 4763template<class _Tp> 4764inline _LIBCPP_INLINE_VISIBILITY 4765bool 4766operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4767{ 4768 return !__x; 4769} 4770 4771template<class _Tp> 4772inline _LIBCPP_INLINE_VISIBILITY 4773bool 4774operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4775{ 4776 return !__x; 4777} 4778 4779template<class _Tp> 4780inline _LIBCPP_INLINE_VISIBILITY 4781bool 4782operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4783{ 4784 return static_cast<bool>(__x); 4785} 4786 4787template<class _Tp> 4788inline _LIBCPP_INLINE_VISIBILITY 4789bool 4790operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4791{ 4792 return static_cast<bool>(__x); 4793} 4794 4795template<class _Tp> 4796inline _LIBCPP_INLINE_VISIBILITY 4797bool 4798operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4799{ 4800 return less<_Tp*>()(__x.get(), nullptr); 4801} 4802 4803template<class _Tp> 4804inline _LIBCPP_INLINE_VISIBILITY 4805bool 4806operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4807{ 4808 return less<_Tp*>()(nullptr, __x.get()); 4809} 4810 4811template<class _Tp> 4812inline _LIBCPP_INLINE_VISIBILITY 4813bool 4814operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4815{ 4816 return nullptr < __x; 4817} 4818 4819template<class _Tp> 4820inline _LIBCPP_INLINE_VISIBILITY 4821bool 4822operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4823{ 4824 return __x < nullptr; 4825} 4826 4827template<class _Tp> 4828inline _LIBCPP_INLINE_VISIBILITY 4829bool 4830operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4831{ 4832 return !(nullptr < __x); 4833} 4834 4835template<class _Tp> 4836inline _LIBCPP_INLINE_VISIBILITY 4837bool 4838operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4839{ 4840 return !(__x < nullptr); 4841} 4842 4843template<class _Tp> 4844inline _LIBCPP_INLINE_VISIBILITY 4845bool 4846operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4847{ 4848 return !(__x < nullptr); 4849} 4850 4851template<class _Tp> 4852inline _LIBCPP_INLINE_VISIBILITY 4853bool 4854operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4855{ 4856 return !(nullptr < __x); 4857} 4858 4859template<class _Tp> 4860inline _LIBCPP_INLINE_VISIBILITY 4861void 4862swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4863{ 4864 __x.swap(__y); 4865} 4866 4867template<class _Tp, class _Up> 4868inline _LIBCPP_INLINE_VISIBILITY 4869typename enable_if 4870< 4871 !is_array<_Tp>::value && !is_array<_Up>::value, 4872 shared_ptr<_Tp> 4873>::type 4874static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4875{ 4876 return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); 4877} 4878 4879template<class _Tp, class _Up> 4880inline _LIBCPP_INLINE_VISIBILITY 4881typename enable_if 4882< 4883 !is_array<_Tp>::value && !is_array<_Up>::value, 4884 shared_ptr<_Tp> 4885>::type 4886dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4887{ 4888 _Tp* __p = dynamic_cast<_Tp*>(__r.get()); 4889 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4890} 4891 4892template<class _Tp, class _Up> 4893typename enable_if 4894< 4895 is_array<_Tp>::value == is_array<_Up>::value, 4896 shared_ptr<_Tp> 4897>::type 4898const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4899{ 4900 typedef typename remove_extent<_Tp>::type _RTp; 4901 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4902} 4903 4904#ifndef _LIBCPP_NO_RTTI 4905 4906template<class _Dp, class _Tp> 4907inline _LIBCPP_INLINE_VISIBILITY 4908_Dp* 4909get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4910{ 4911 return __p.template __get_deleter<_Dp>(); 4912} 4913 4914#endif // _LIBCPP_NO_RTTI 4915 4916template<class _Tp> 4917class _LIBCPP_TEMPLATE_VIS weak_ptr 4918{ 4919public: 4920 typedef _Tp element_type; 4921private: 4922 element_type* __ptr_; 4923 __shared_weak_count* __cntrl_; 4924 4925public: 4926 _LIBCPP_INLINE_VISIBILITY 4927 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4928 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4929 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4930 _NOEXCEPT; 4931 _LIBCPP_INLINE_VISIBILITY 4932 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4933 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4934 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4935 _NOEXCEPT; 4936 4937#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4938 _LIBCPP_INLINE_VISIBILITY 4939 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4940 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4941 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4942 _NOEXCEPT; 4943#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4944 ~weak_ptr(); 4945 4946 _LIBCPP_INLINE_VISIBILITY 4947 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4948 template<class _Yp> 4949 typename enable_if 4950 < 4951 is_convertible<_Yp*, element_type*>::value, 4952 weak_ptr& 4953 >::type 4954 _LIBCPP_INLINE_VISIBILITY 4955 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4956 4957#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4958 4959 _LIBCPP_INLINE_VISIBILITY 4960 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4961 template<class _Yp> 4962 typename enable_if 4963 < 4964 is_convertible<_Yp*, element_type*>::value, 4965 weak_ptr& 4966 >::type 4967 _LIBCPP_INLINE_VISIBILITY 4968 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4969 4970#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4971 4972 template<class _Yp> 4973 typename enable_if 4974 < 4975 is_convertible<_Yp*, element_type*>::value, 4976 weak_ptr& 4977 >::type 4978 _LIBCPP_INLINE_VISIBILITY 4979 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4980 4981 _LIBCPP_INLINE_VISIBILITY 4982 void swap(weak_ptr& __r) _NOEXCEPT; 4983 _LIBCPP_INLINE_VISIBILITY 4984 void reset() _NOEXCEPT; 4985 4986 _LIBCPP_INLINE_VISIBILITY 4987 long use_count() const _NOEXCEPT 4988 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4989 _LIBCPP_INLINE_VISIBILITY 4990 bool expired() const _NOEXCEPT 4991 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4992 shared_ptr<_Tp> lock() const _NOEXCEPT; 4993 template<class _Up> 4994 _LIBCPP_INLINE_VISIBILITY 4995 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4996 {return __cntrl_ < __r.__cntrl_;} 4997 template<class _Up> 4998 _LIBCPP_INLINE_VISIBILITY 4999 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 5000 {return __cntrl_ < __r.__cntrl_;} 5001 5002 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 5003 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 5004}; 5005 5006template<class _Tp> 5007inline 5008_LIBCPP_CONSTEXPR 5009weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 5010 : __ptr_(0), 5011 __cntrl_(0) 5012{ 5013} 5014 5015template<class _Tp> 5016inline 5017weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 5018 : __ptr_(__r.__ptr_), 5019 __cntrl_(__r.__cntrl_) 5020{ 5021 if (__cntrl_) 5022 __cntrl_->__add_weak(); 5023} 5024 5025template<class _Tp> 5026template<class _Yp> 5027inline 5028weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 5029 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5030 _NOEXCEPT 5031 : __ptr_(__r.__ptr_), 5032 __cntrl_(__r.__cntrl_) 5033{ 5034 if (__cntrl_) 5035 __cntrl_->__add_weak(); 5036} 5037 5038template<class _Tp> 5039template<class _Yp> 5040inline 5041weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 5042 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5043 _NOEXCEPT 5044 : __ptr_(__r.__ptr_), 5045 __cntrl_(__r.__cntrl_) 5046{ 5047 if (__cntrl_) 5048 __cntrl_->__add_weak(); 5049} 5050 5051#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5052 5053template<class _Tp> 5054inline 5055weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 5056 : __ptr_(__r.__ptr_), 5057 __cntrl_(__r.__cntrl_) 5058{ 5059 __r.__ptr_ = 0; 5060 __r.__cntrl_ = 0; 5061} 5062 5063template<class _Tp> 5064template<class _Yp> 5065inline 5066weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 5067 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5068 _NOEXCEPT 5069 : __ptr_(__r.__ptr_), 5070 __cntrl_(__r.__cntrl_) 5071{ 5072 __r.__ptr_ = 0; 5073 __r.__cntrl_ = 0; 5074} 5075 5076#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5077 5078template<class _Tp> 5079weak_ptr<_Tp>::~weak_ptr() 5080{ 5081 if (__cntrl_) 5082 __cntrl_->__release_weak(); 5083} 5084 5085template<class _Tp> 5086inline 5087weak_ptr<_Tp>& 5088weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 5089{ 5090 weak_ptr(__r).swap(*this); 5091 return *this; 5092} 5093 5094template<class _Tp> 5095template<class _Yp> 5096inline 5097typename enable_if 5098< 5099 is_convertible<_Yp*, _Tp*>::value, 5100 weak_ptr<_Tp>& 5101>::type 5102weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 5103{ 5104 weak_ptr(__r).swap(*this); 5105 return *this; 5106} 5107 5108#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5109 5110template<class _Tp> 5111inline 5112weak_ptr<_Tp>& 5113weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 5114{ 5115 weak_ptr(_VSTD::move(__r)).swap(*this); 5116 return *this; 5117} 5118 5119template<class _Tp> 5120template<class _Yp> 5121inline 5122typename enable_if 5123< 5124 is_convertible<_Yp*, _Tp*>::value, 5125 weak_ptr<_Tp>& 5126>::type 5127weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 5128{ 5129 weak_ptr(_VSTD::move(__r)).swap(*this); 5130 return *this; 5131} 5132 5133#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5134 5135template<class _Tp> 5136template<class _Yp> 5137inline 5138typename enable_if 5139< 5140 is_convertible<_Yp*, _Tp*>::value, 5141 weak_ptr<_Tp>& 5142>::type 5143weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 5144{ 5145 weak_ptr(__r).swap(*this); 5146 return *this; 5147} 5148 5149template<class _Tp> 5150inline 5151void 5152weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 5153{ 5154 _VSTD::swap(__ptr_, __r.__ptr_); 5155 _VSTD::swap(__cntrl_, __r.__cntrl_); 5156} 5157 5158template<class _Tp> 5159inline _LIBCPP_INLINE_VISIBILITY 5160void 5161swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 5162{ 5163 __x.swap(__y); 5164} 5165 5166template<class _Tp> 5167inline 5168void 5169weak_ptr<_Tp>::reset() _NOEXCEPT 5170{ 5171 weak_ptr().swap(*this); 5172} 5173 5174template<class _Tp> 5175template<class _Yp> 5176shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 5177 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 5178 : __ptr_(__r.__ptr_), 5179 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 5180{ 5181 if (__cntrl_ == 0) 5182 __throw_bad_weak_ptr(); 5183} 5184 5185template<class _Tp> 5186shared_ptr<_Tp> 5187weak_ptr<_Tp>::lock() const _NOEXCEPT 5188{ 5189 shared_ptr<_Tp> __r; 5190 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 5191 if (__r.__cntrl_) 5192 __r.__ptr_ = __ptr_; 5193 return __r; 5194} 5195 5196#if _LIBCPP_STD_VER > 14 5197template <class _Tp = void> struct owner_less; 5198#else 5199template <class _Tp> struct owner_less; 5200#endif 5201 5202template <class _Tp> 5203struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 5204 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 5205{ 5206 typedef bool result_type; 5207 _LIBCPP_INLINE_VISIBILITY 5208 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5209 {return __x.owner_before(__y);} 5210 _LIBCPP_INLINE_VISIBILITY 5211 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5212 {return __x.owner_before(__y);} 5213 _LIBCPP_INLINE_VISIBILITY 5214 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5215 {return __x.owner_before(__y);} 5216}; 5217 5218template <class _Tp> 5219struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 5220 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 5221{ 5222 typedef bool result_type; 5223 _LIBCPP_INLINE_VISIBILITY 5224 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5225 {return __x.owner_before(__y);} 5226 _LIBCPP_INLINE_VISIBILITY 5227 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5228 {return __x.owner_before(__y);} 5229 _LIBCPP_INLINE_VISIBILITY 5230 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5231 {return __x.owner_before(__y);} 5232}; 5233 5234#if _LIBCPP_STD_VER > 14 5235template <> 5236struct _LIBCPP_TEMPLATE_VIS owner_less<void> 5237{ 5238 template <class _Tp, class _Up> 5239 _LIBCPP_INLINE_VISIBILITY 5240 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5241 {return __x.owner_before(__y);} 5242 template <class _Tp, class _Up> 5243 _LIBCPP_INLINE_VISIBILITY 5244 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5245 {return __x.owner_before(__y);} 5246 template <class _Tp, class _Up> 5247 _LIBCPP_INLINE_VISIBILITY 5248 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5249 {return __x.owner_before(__y);} 5250 template <class _Tp, class _Up> 5251 _LIBCPP_INLINE_VISIBILITY 5252 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5253 {return __x.owner_before(__y);} 5254 typedef void is_transparent; 5255}; 5256#endif 5257 5258template<class _Tp> 5259class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 5260{ 5261 mutable weak_ptr<_Tp> __weak_this_; 5262protected: 5263 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 5264 enable_shared_from_this() _NOEXCEPT {} 5265 _LIBCPP_INLINE_VISIBILITY 5266 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 5267 _LIBCPP_INLINE_VISIBILITY 5268 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 5269 {return *this;} 5270 _LIBCPP_INLINE_VISIBILITY 5271 ~enable_shared_from_this() {} 5272public: 5273 _LIBCPP_INLINE_VISIBILITY 5274 shared_ptr<_Tp> shared_from_this() 5275 {return shared_ptr<_Tp>(__weak_this_);} 5276 _LIBCPP_INLINE_VISIBILITY 5277 shared_ptr<_Tp const> shared_from_this() const 5278 {return shared_ptr<const _Tp>(__weak_this_);} 5279 5280#if _LIBCPP_STD_VER > 14 5281 _LIBCPP_INLINE_VISIBILITY 5282 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 5283 { return __weak_this_; } 5284 5285 _LIBCPP_INLINE_VISIBILITY 5286 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 5287 { return __weak_this_; } 5288#endif // _LIBCPP_STD_VER > 14 5289 5290 template <class _Up> friend class shared_ptr; 5291}; 5292 5293template <class _Tp> 5294struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 5295{ 5296 typedef shared_ptr<_Tp> argument_type; 5297 typedef size_t result_type; 5298 5299 _LIBCPP_INLINE_VISIBILITY 5300 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 5301 { 5302 return hash<_Tp*>()(__ptr.get()); 5303 } 5304}; 5305 5306template<class _CharT, class _Traits, class _Yp> 5307inline _LIBCPP_INLINE_VISIBILITY 5308basic_ostream<_CharT, _Traits>& 5309operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 5310 5311 5312#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5313 5314class _LIBCPP_TYPE_VIS __sp_mut 5315{ 5316 void* __lx; 5317public: 5318 void lock() _NOEXCEPT; 5319 void unlock() _NOEXCEPT; 5320 5321private: 5322 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 5323 __sp_mut(const __sp_mut&); 5324 __sp_mut& operator=(const __sp_mut&); 5325 5326 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 5327}; 5328 5329_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5330__sp_mut& __get_sp_mut(const void*); 5331 5332template <class _Tp> 5333inline _LIBCPP_INLINE_VISIBILITY 5334bool 5335atomic_is_lock_free(const shared_ptr<_Tp>*) 5336{ 5337 return false; 5338} 5339 5340template <class _Tp> 5341_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5342shared_ptr<_Tp> 5343atomic_load(const shared_ptr<_Tp>* __p) 5344{ 5345 __sp_mut& __m = __get_sp_mut(__p); 5346 __m.lock(); 5347 shared_ptr<_Tp> __q = *__p; 5348 __m.unlock(); 5349 return __q; 5350} 5351 5352template <class _Tp> 5353inline _LIBCPP_INLINE_VISIBILITY 5354_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5355shared_ptr<_Tp> 5356atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5357{ 5358 return atomic_load(__p); 5359} 5360 5361template <class _Tp> 5362_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5363void 5364atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5365{ 5366 __sp_mut& __m = __get_sp_mut(__p); 5367 __m.lock(); 5368 __p->swap(__r); 5369 __m.unlock(); 5370} 5371 5372template <class _Tp> 5373inline _LIBCPP_INLINE_VISIBILITY 5374_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5375void 5376atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5377{ 5378 atomic_store(__p, __r); 5379} 5380 5381template <class _Tp> 5382_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5383shared_ptr<_Tp> 5384atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5385{ 5386 __sp_mut& __m = __get_sp_mut(__p); 5387 __m.lock(); 5388 __p->swap(__r); 5389 __m.unlock(); 5390 return __r; 5391} 5392 5393template <class _Tp> 5394inline _LIBCPP_INLINE_VISIBILITY 5395_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5396shared_ptr<_Tp> 5397atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5398{ 5399 return atomic_exchange(__p, __r); 5400} 5401 5402template <class _Tp> 5403_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5404bool 5405atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5406{ 5407 shared_ptr<_Tp> __temp; 5408 __sp_mut& __m = __get_sp_mut(__p); 5409 __m.lock(); 5410 if (__p->__owner_equivalent(*__v)) 5411 { 5412 _VSTD::swap(__temp, *__p); 5413 *__p = __w; 5414 __m.unlock(); 5415 return true; 5416 } 5417 _VSTD::swap(__temp, *__v); 5418 *__v = *__p; 5419 __m.unlock(); 5420 return false; 5421} 5422 5423template <class _Tp> 5424inline _LIBCPP_INLINE_VISIBILITY 5425_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5426bool 5427atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5428{ 5429 return atomic_compare_exchange_strong(__p, __v, __w); 5430} 5431 5432template <class _Tp> 5433inline _LIBCPP_INLINE_VISIBILITY 5434_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5435bool 5436atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5437 shared_ptr<_Tp> __w, memory_order, memory_order) 5438{ 5439 return atomic_compare_exchange_strong(__p, __v, __w); 5440} 5441 5442template <class _Tp> 5443inline _LIBCPP_INLINE_VISIBILITY 5444_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5445bool 5446atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5447 shared_ptr<_Tp> __w, memory_order, memory_order) 5448{ 5449 return atomic_compare_exchange_weak(__p, __v, __w); 5450} 5451 5452#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5453 5454//enum class 5455#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5456# ifndef _LIBCPP_CXX03_LANG 5457enum class pointer_safety : unsigned char { 5458 relaxed, 5459 preferred, 5460 strict 5461}; 5462# endif 5463#else 5464struct _LIBCPP_TYPE_VIS pointer_safety 5465{ 5466 enum __lx 5467 { 5468 relaxed, 5469 preferred, 5470 strict 5471 }; 5472 5473 __lx __v_; 5474 5475 _LIBCPP_INLINE_VISIBILITY 5476 pointer_safety() : __v_() {} 5477 5478 _LIBCPP_INLINE_VISIBILITY 5479 pointer_safety(__lx __v) : __v_(__v) {} 5480 _LIBCPP_INLINE_VISIBILITY 5481 operator int() const {return __v_;} 5482}; 5483#endif 5484 5485#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5486 defined(_LIBCPP_BUILDING_MEMORY) 5487_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5488#else 5489// This function is only offered in C++03 under ABI v1. 5490# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5491inline _LIBCPP_INLINE_VISIBILITY 5492pointer_safety get_pointer_safety() _NOEXCEPT { 5493 return pointer_safety::relaxed; 5494} 5495# endif 5496#endif 5497 5498 5499_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5500_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5501_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5502_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5503 5504template <class _Tp> 5505inline _LIBCPP_INLINE_VISIBILITY 5506_Tp* 5507undeclare_reachable(_Tp* __p) 5508{ 5509 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5510} 5511 5512_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5513 5514// --- Helper for container swap -- 5515template <typename _Alloc> 5516inline _LIBCPP_INLINE_VISIBILITY 5517void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5518#if _LIBCPP_STD_VER >= 14 5519 _NOEXCEPT 5520#else 5521 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5522#endif 5523{ 5524 __swap_allocator(__a1, __a2, 5525 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5526} 5527 5528template <typename _Alloc> 5529_LIBCPP_INLINE_VISIBILITY 5530void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5531#if _LIBCPP_STD_VER >= 14 5532 _NOEXCEPT 5533#else 5534 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5535#endif 5536{ 5537 using _VSTD::swap; 5538 swap(__a1, __a2); 5539} 5540 5541template <typename _Alloc> 5542inline _LIBCPP_INLINE_VISIBILITY 5543void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5544 5545template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5546struct __noexcept_move_assign_container : public integral_constant<bool, 5547 _Traits::propagate_on_container_move_assignment::value 5548#if _LIBCPP_STD_VER > 14 5549 || _Traits::is_always_equal::value 5550#else 5551 && is_nothrow_move_assignable<_Alloc>::value 5552#endif 5553 > {}; 5554 5555 5556#ifndef _LIBCPP_HAS_NO_VARIADICS 5557template <class _Tp, class _Alloc> 5558struct __temp_value { 5559 typedef allocator_traits<_Alloc> _Traits; 5560 5561 typename aligned_storage<sizeof(_Tp), alignof(_Tp)>::type __v; 5562 _Alloc &__a; 5563 5564 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5565 _Tp & get() { return *__addr(); } 5566 5567 template<class... _Args> 5568 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) 5569 { _Traits::construct(__a, __addr(), _VSTD::forward<_Args>(__args)...); } 5570 5571 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5572 }; 5573#endif 5574 5575_LIBCPP_END_NAMESPACE_STD 5576 5577#endif // _LIBCPP_MEMORY 5578