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Fix indentation of experimental::shared_ptr code
[thirdparty/gcc.git] / libstdc++-v3 / include / experimental / bits / shared_ptr.h
CommitLineData
930d5602
FY		 1// Experimental shared_ptr with array support -*- C++ -*-
2
818ab71a 3// Copyright (C) 2015-2016 Free Software Foundation, Inc.
930d5602
FY		 4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file experimental/bits/shared_ptr.h
26 * This is an internal header file, included by other library headers.
011b25e4 27 * Do not attempt to use it directly. @headername{experimental/memory}
930d5602
FY		 28 */
29
30#ifndef _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H
31#define _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H 1
32
33#pragma GCC system_header
34
35#if __cplusplus <= 201103L
36# include <bits/c++14_warning.h>
37#else
38
39#include <memory>
40#include <experimental/type_traits>
41
42namespace std _GLIBCXX_VISIBILITY(default)
43{
44namespace experimental
45{
46inline namespace fundamentals_v2
47{
48_GLIBCXX_BEGIN_NAMESPACE_VERSION
49 template<typename _Tp> class enable_shared_from_this;
50_GLIBCXX_END_NAMESPACE_VERSION
51} // namespace fundamentals_v2
52} // namespace experimental
53
54#define __cpp_lib_experimental_shared_ptr_arrays 201406
55
56_GLIBCXX_BEGIN_NAMESPACE_VERSION
57
58 /*
59 * The specification of std::experimental::shared_ptr is slightly different
011b25e4 60 * to std::shared_ptr (specifically in terms of "compatible" pointers) so
930d5602
FY		 61 * to implement std::experimental::shared_ptr without too much duplication
62 * we make it derive from a partial specialization of std::__shared_ptr
63 * using a special tag type, __libfund_v1.
64 *
65 * There are two partial specializations for the tag type, supporting the
66 * different interfaces of the array and non-array forms.
67 */
68
69 template <typename _Tp, bool = is_array<_Tp>::value>
70 struct __libfund_v1 { using type = _Tp; };
71
72 // helper for _Compatible
73 template<typename _From_type, typename _To_type>
74 struct __sp_compatible
75 : is_convertible<_From_type*, _To_type*>::type
76 { };
77
78 template<size_t _Nm, typename _Tp>
79 struct __sp_compatible<_Tp[_Nm], _Tp[]>
80 : true_type
81 { };
82
83 template<size_t _Nm, typename _Tp>
84 struct __sp_compatible<_Tp[_Nm], const _Tp[]>
85 : true_type
86 { };
87
88 // Partial specialization for base class of experimental::shared_ptr<T>
89 // (i.e. the non-array form of experimental::shared_ptr)
90 template<typename _Tp, _Lock_policy _Lp>
91 class __shared_ptr<__libfund_v1<_Tp, false>, _Lp>
92 : private __shared_ptr<_Tp, _Lp>
93 {
aca12aff 94 template<typename _Tp1, typename _Res = void>
930d5602 95 using _Compatible
aca12aff 96 = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
930d5602
FY		 97
98 using _Base_type = __shared_ptr<_Tp>;
99
100 _Base_type& _M_get_base() { return *this;}
101 const _Base_type& _M_get_base() const { return *this;}
102
103 public:
104 using element_type = _Tp;
105
106 constexpr __shared_ptr() noexcept = default;
107
108 template<typename _Tp1>
109 explicit __shared_ptr(_Tp1* __p)
110 : _Base_type(__p)
111 { }
112
113 template<typename _Tp1, typename _Deleter>
114 __shared_ptr(_Tp1* __p, _Deleter __d)
115 : _Base_type(__p, __d)
116 { }
117
118 template<typename _Tp1, typename _Deleter, typename _Alloc>
119 __shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
120 : _Base_type(__p, __d, __a)
121 { }
122
123 template<typename _Deleter>
124 __shared_ptr(nullptr_t __p, _Deleter __d)
125 : _Base_type(__p, __d)
126 { }
127
128 template<typename _Deleter, typename _Alloc>
129 __shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
130 : _Base_type(__p, __d, __a)
131 { }
132
133 template<typename _Tp1>
134 __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r,
135 element_type* __p) noexcept
136 : _Base_type(__r._M_get_base(), __p)
137 { }
138
139 __shared_ptr(const __shared_ptr&) noexcept = default;
140 __shared_ptr(__shared_ptr&&) noexcept = default;
141 __shared_ptr& operator=(const __shared_ptr&) noexcept = default;
142 __shared_ptr& operator=(__shared_ptr&&) noexcept = default;
143 ~__shared_ptr() = default;
144
145 template<typename _Tp1, typename = _Compatible<_Tp1>>
146 __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
147 : _Base_type(__r._M_get_base())
148 { }
149
150 template<typename _Tp1, typename = _Compatible<_Tp1>>
151 __shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
152 : _Base_type(std::move((__r._M_get_base())))
153 { }
154
155 template<typename _Tp1>
156 explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r)
157 : _Base_type(__r._M_get_base())
158 { }
159
160 template<typename _Tp1, typename _Del, typename
161 = _Compatible<remove_pointer_t<
162 typename unique_ptr<_Tp1, _Del>::pointer>>>
163 __shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
164 : _Base_type(std::move(__r))
165 { }
166
167#if _GLIBCXX_USE_DEPRECATED
168 // Postcondition: use_count() == 1 and __r.get() == 0
169 template<typename _Tp1>
170 __shared_ptr(std::auto_ptr<_Tp1>&& __r)
171 : _Base_type(std::move(__r))
172 { }
173#endif
174
175 constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }
176
177 // reset
178 void
179 reset() noexcept
180 { __shared_ptr(nullptr).swap(*this); }
181
182 template<typename _Tp1>
183 void
184 reset(_Tp1* __p)
185 {
186 _GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get());
187 __shared_ptr(__p).swap(*this);
188 }
189
190 template<typename _Tp1, typename _Deleter>
191 void
192 reset(_Tp1* __p, _Deleter __d)
193 { __shared_ptr(__p, __d).swap(*this); }
194
195 template<typename _Tp1, typename _Deleter, typename _Alloc>
196 void
197 reset(_Tp1* __p, _Deleter __d, _Alloc __a)
198 { __shared_ptr(__p, __d, std::move(__a)).swap(*this); }
199
200 using _Base_type::operator*;
201 using _Base_type::operator->;
202
203 template<typename _Tp1>
aca12aff 204 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 205 operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
206 {
207 _Base_type::operator=(__r._M_get_base());
208 return *this;
209 }
210
211 template<class _Tp1>
aca12aff 212 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 213 operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
214 {
215 _Base_type::operator=(std::move(__r._M_get_base()));
216 return *this;
217 }
218
219 template<typename _Tp1>
aca12aff 220 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 221 operator=(std::unique_ptr<_Tp1>&& __r)
222 {
223 _Base_type::operator=(std::move(__r));
224 return *this;
225 }
226
227#if _GLIBCXX_USE_DEPRECATED
228 template<typename _Tp1>
aca12aff 229 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 230 operator=(std::auto_ptr<_Tp1>&& __r)
231 {
232 _Base_type::operator=(std::move(__r));
233 return *this;
234 }
235#endif
236
237 void
238 swap(__shared_ptr& __other) noexcept
239 { _Base_type::swap(__other); }
240
241 template<typename _Tp1>
242 bool
243 owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
244 { return _Base_type::owner_before(__rhs._M_get_base()); }
245
246 template<typename _Tp1>
247 bool
248 owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
249 { return _Base_type::owner_before(__rhs._M_get_base()); }
250
251 using _Base_type::operator bool;
252 using _Base_type::get;
253 using _Base_type::unique;
254 using _Base_type::use_count;
255
256 protected:
257
258 // make_shared not yet support for shared_ptr_arrays
259 //template<typename _Alloc, typename... _Args>
260 // __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
261 // _Args&&... __args)
262 // : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,
263 // std::forward<_Args>(__args)...)
264 // {
265 // void* __p = _M_refcount._M_get_deleter(typeid(__tag));
266 // _M_ptr = static_cast<_Tp*>(__p);
267 // __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);
268 // }
269
270 // __weak_ptr::lock()
271 __shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r,
272 std::nothrow_t)
273 : _Base_type(__r._M_get_base(), std::nothrow)
274 { }
275
276 private:
277 template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
278 template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
279
280 // TODO
281 template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
282 friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;
283 };
284
285 // Partial specialization for base class of experimental::shared_ptr<T[N]>
286 // and experimental::shared_ptr<T[]> (i.e. the array forms).
287 template<typename _Tp, _Lock_policy _Lp>
288 class __shared_ptr<__libfund_v1<_Tp, true>, _Lp>
289 : private __shared_ptr<remove_extent_t<_Tp>, _Lp>
290 {
291 public:
292 using element_type = remove_extent_t<_Tp>;
293
294 private:
aca12aff 295 struct _Array_deleter
930d5602
FY		 296 {
297 void
298 operator()(element_type const *__p) const
299 { delete [] __p; }
300 };
301
aca12aff 302 template<typename _Tp1, typename _Res = void>
930d5602 303 using _Compatible
aca12aff 304 = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
930d5602
FY		 305
306 using _Base_type = __shared_ptr<element_type>;
307
308 _Base_type& _M_get_base() { return *this;}
309 const _Base_type& _M_get_base() const { return *this;}
310
311 public:
312 constexpr __shared_ptr() noexcept
313 : _Base_type()
314 { }
315
316 template<typename _Tp1>
317 explicit __shared_ptr(_Tp1* __p)
aca12aff 318 : _Base_type(__p, _Array_deleter())
930d5602
FY		 319 { }
320
321 template<typename _Tp1, typename _Deleter>
322 __shared_ptr(_Tp1* __p, _Deleter __d)
323 : _Base_type(__p, __d)
324 { }
325
326 template<typename _Tp1, typename _Deleter, typename _Alloc>
327 __shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
328 : _Base_type(__p, __d, __a)
329 { }
330
331 template<typename _Deleter>
332 __shared_ptr(nullptr_t __p, _Deleter __d)
333 : _Base_type(__p, __d)
334 { }
335
336 template<typename _Deleter, typename _Alloc>
337 __shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
338 : _Base_type(__p, __d, __a)
339 { }
340
341 template<typename _Tp1>
342 __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r,
343 element_type* __p) noexcept
344 : _Base_type(__r._M_get_base(), __p)
345 { }
346
347 __shared_ptr(const __shared_ptr&) noexcept = default;
348 __shared_ptr(__shared_ptr&&) noexcept = default;
349 __shared_ptr& operator=(const __shared_ptr&) noexcept = default;
350 __shared_ptr& operator=(__shared_ptr&&) noexcept = default;
351 ~__shared_ptr() = default;
352
353 template<typename _Tp1, typename = _Compatible<_Tp1>>
354 __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
355 : _Base_type(__r._M_get_base())
356 { }
357
358 template<typename _Tp1, typename = _Compatible<_Tp1>>
359 __shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
360 : _Base_type(std::move((__r._M_get_base())))
361 { }
362
363 template<typename _Tp1>
364 explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r)
365 : _Base_type(__r._M_get_base())
366 { }
367
368 template<typename _Tp1, typename _Del, typename
369 = _Compatible<remove_pointer_t<
370 typename unique_ptr<_Tp1, _Del>::pointer>>>
371 __shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
372 : _Base_type(std::move(__r))
373 { }
374
375#if _GLIBCXX_USE_DEPRECATED
376 // Postcondition: use_count() == 1 and __r.get() == 0
377 template<typename _Tp1>
378 __shared_ptr(std::auto_ptr<_Tp1>&& __r)
379 : _Base_type(std::move(__r))
380 { }
381#endif
382
383 constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }
384
385 // reset
386 void
387 reset() noexcept
388 { __shared_ptr(nullptr).swap(*this); }
389
390 template<typename _Tp1>
391 void
392 reset(_Tp1* __p)
393 {
394 _GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get());
aca12aff 395 __shared_ptr(__p, _Array_deleter()).swap(*this);
930d5602
FY		 396 }
397
398 template<typename _Tp1, typename _Deleter>
399 void
400 reset(_Tp1* __p, _Deleter __d)
401 { __shared_ptr(__p, __d).swap(*this); }
402
403 template<typename _Tp1, typename _Deleter, typename _Alloc>
404 void
405 reset(_Tp1* __p, _Deleter __d, _Alloc __a)
406 { __shared_ptr(__p, __d, std::move(__a)).swap(*this); }
407
408 element_type&
409 operator[](ptrdiff_t i) const noexcept
410 {
411 _GLIBCXX_DEBUG_ASSERT(get() != 0 && i >= 0);
412 return get()[i];
413 }
414
415 template<typename _Tp1>
aca12aff 416 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 417 operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
418 {
419 _Base_type::operator=(__r._M_get_base());
420 return *this;
421 }
422
423 template<class _Tp1>
aca12aff 424 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 425 operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
426 {
427 _Base_type::operator=(std::move(__r._M_get_base()));
428 return *this;
429 }
430
431 template<typename _Tp1>
aca12aff 432 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 433 operator=(std::unique_ptr<_Tp1>&& __r)
434 {
435 _Base_type::operator=(std::move(__r));
436 return *this;
437 }
438
439#if _GLIBCXX_USE_DEPRECATED
440 template<typename _Tp1>
aca12aff 441 _Compatible<_Tp1, __shared_ptr&>
930d5602
FY		 442 operator=(std::auto_ptr<_Tp1>&& __r)
443 {
444 _Base_type::operator=(std::move(__r));
445 return *this;
446 }
447#endif
448
449 void
450 swap(__shared_ptr& __other) noexcept
451 { _Base_type::swap(__other); }
452
453 template<typename _Tp1>
454 bool
455 owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
456 { return _Base_type::owner_before(__rhs._M_get_base()); }
457
458 template<typename _Tp1>
459 bool
460 owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
461 { return _Base_type::owner_before(__rhs._M_get_base()); }
462
463 using _Base_type::operator bool;
464 using _Base_type::get;
465 using _Base_type::unique;
466 using _Base_type::use_count;
467
468 protected:
469
470 // make_shared not yet support for shared_ptr_arrays
471 //template<typename _Alloc, typename... _Args>
472 // __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
473 // _Args&&... __args)
474 // : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,
475 // std::forward<_Args>(__args)...)
476 // {
477 // void* __p = _M_refcount._M_get_deleter(typeid(__tag));
478 // _M_ptr = static_cast<_Tp*>(__p);
479 // __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);
480 // }
481
482 // __weak_ptr::lock()
483 __shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r,
484 std::nothrow_t)
485 : _Base_type(__r._M_get_base(), std::nothrow)
486 { }
487
488 private:
489 template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
490 template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
491
492 // TODO
493 template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
494 friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;
495 };
496
497 // weak_ptr specialization for __shared_ptr array
498 template<typename _Tp, _Lock_policy _Lp>
499 class __weak_ptr<__libfund_v1<_Tp>, _Lp>
500 : __weak_ptr<remove_extent_t<_Tp>, _Lp>
501 {
aca12aff
JW		 502 template<typename _Tp1, typename _Res = void>
503 using _Compatible
504 = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
930d5602
FY		 505
506 using _Base_type = __weak_ptr<remove_extent_t<_Tp>>;
507
508 _Base_type& _M_get_base() { return *this;}
509 const _Base_type& _M_get_base() const { return *this; }
510
511 public:
512 using element_type = remove_extent_t<_Tp>;
513
514 constexpr __weak_ptr() noexcept
515 : _Base_type()
516 { }
517
518 __weak_ptr(const __weak_ptr&) noexcept = default;
519
520 ~__weak_ptr() = default;
521
522 template<typename _Tp1, typename = _Compatible<_Tp1>>
523 __weak_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
524 : _Base_type(__r._M_get_base())
525 { }
526
527 template<typename _Tp1, typename = _Compatible<_Tp1>>
528 __weak_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
529 : _Base_type(__r._M_get_base())
530 { }
531
532 __weak_ptr(__weak_ptr&& __r) noexcept
533 : _Base_type(std::move(__r))
534 { }
535
536 template<typename _Tp1, typename = _Compatible<_Tp1>>
537 __weak_ptr(__weak_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
538 : _Base_type(std::move(__r._M_get_base()))
539 { }
540
541 __weak_ptr&
542 operator=(const __weak_ptr& __r) noexcept = default;
543
544 template<typename _Tp1>
aca12aff 545 _Compatible<_Tp1, __weak_ptr&>
930d5602
FY		 546 operator=(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
547 {
548 this->_Base_type::operator=(__r._M_get_base());
549 return *this;
550 }
551
552 template<typename _Tp1>
aca12aff 553 _Compatible<_Tp1, __weak_ptr&>
930d5602
FY		 554 operator=(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
555 {
556 this->_Base_type::operator=(__r._M_get_base());
557 return *this;
558 }
559
560 __weak_ptr&
561 operator=(__weak_ptr&& __r) noexcept
562 {
563 this->_Base_type::operator=(std::move(__r));
564 return *this;
565 }
566
567 template<typename _Tp1>
aca12aff 568 _Compatible<_Tp1, __weak_ptr&>
930d5602
FY		 569 operator=(__weak_ptr<_Tp1, _Lp>&& __r) noexcept
570 {
571 this->_Base_type::operator=(std::move(__r._M_get_base()));
572 return *this;
573 }
574
575 void
576 swap(__weak_ptr& __other) noexcept
577 { this->_Base_type::swap(__other); }
578
579 template<typename _Tp1>
580 bool
581 owner_before(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __rhs) const
582 { return _Base_type::owner_before(__rhs._M_get_base()); }
583
584 template<typename _Tp1>
585 bool
586 owner_before(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __rhs) const
587 { return _Base_type::owner_before(__rhs._M_get_base()); }
588
589 __shared_ptr<__libfund_v1<_Tp>, _Lp>
590 lock() const noexcept // should not be element_type
591 { return __shared_ptr<__libfund_v1<_Tp>, _Lp>(*this, std::nothrow); }
592
593 using _Base_type::use_count;
594 using _Base_type::expired;
595 using _Base_type::reset;
596
597 private:
598 // Used by __enable_shared_from_this.
599 void
600 _M_assign(element_type* __ptr,
601 const __shared_count<_Lp>& __refcount) noexcept
602 { this->_Base_type::_M_assign(__ptr, __refcount); }
603
604 template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
605 template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
606 friend class __enable_shared_from_this<_Tp, _Lp>;
607 friend class experimental::enable_shared_from_this<_Tp>;
608 friend class enable_shared_from_this<_Tp>;
609 };
610
611_GLIBCXX_END_NAMESPACE_VERSION
612
613namespace experimental
614{
615inline namespace fundamentals_v2
616{
617_GLIBCXX_BEGIN_NAMESPACE_VERSION
618
619 // 8.2.1
620
621 template<typename _Tp> class shared_ptr;
622 template<typename _Tp> class weak_ptr;
623
624 template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
625 using __shared_ptr = std::__shared_ptr<__libfund_v1<_Tp>, _Lp>;
626
627 template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
628 using __weak_ptr = std::__weak_ptr<__libfund_v1<_Tp>, _Lp>;
629
630 template<typename _Tp>
631 class shared_ptr : public __shared_ptr<_Tp>
632 {
aca12aff
JW		 633 template<typename _Tp1, typename _Res = void>
634 using _Compatible
635 = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
930d5602
FY		 636
637 using _Base_type = __shared_ptr<_Tp>;
638
639 public:
640 using element_type = typename _Base_type::element_type;
641
642 // 8.2.1.1, shared_ptr constructors
643 constexpr shared_ptr() noexcept = default;
644
645 template<typename _Tp1>
646 explicit shared_ptr(_Tp1* __p) : _Base_type(__p) { }
647
648 template<typename _Tp1, typename _Deleter>
649 shared_ptr(_Tp1* __p, _Deleter __d)
650 : _Base_type(__p, __d) { }
651
652 template<typename _Tp1, typename _Deleter, typename _Alloc>
653 shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
654 : _Base_type(__p, __d, __a) { }
655
656 template<typename _Deleter>
657 shared_ptr(nullptr_t __p, _Deleter __d)
658 : _Base_type(__p, __d) { }
659
660 template<typename _Deleter, typename _Alloc>
661 shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
662 : _Base_type(__p, __d, __a) { }
663
664 template<typename _Tp1>
665 shared_ptr(const shared_ptr<_Tp1>& __r, element_type* __p) noexcept
666 : _Base_type(__r, __p) { }
667
668 shared_ptr(const shared_ptr& __r) noexcept
669 : _Base_type(__r) { }
670
671 template<typename _Tp1, typename = _Compatible<_Tp1>>
672 shared_ptr(const shared_ptr<_Tp1>& __r) noexcept
673 : _Base_type(__r) { }
674
8a9ff71f 675 shared_ptr(shared_ptr&& __r) noexcept
930d5602
FY		 676 : _Base_type(std::move(__r)) { }
677
678 template<typename _Tp1, typename = _Compatible<_Tp1>>
679 shared_ptr(shared_ptr<_Tp1>&& __r) noexcept
680 : _Base_type(std::move(__r)) { }
681
682 template<typename _Tp1>
683 explicit shared_ptr(const weak_ptr<_Tp1>& __r)
684 : _Base_type(__r) { }
685
686#if _GLIBCXX_USE_DEPRECATED
687 template<typename _Tp1>
688 shared_ptr(std::auto_ptr<_Tp1>&& __r)
689 : _Base_type() { } // TODO
690#endif
691
692 template<typename _Tp1, typename _Del, typename
693 = _Compatible<remove_pointer_t<
694 typename unique_ptr<_Tp1, _Del>::pointer>>>
695 shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
696 : _Base_type(std::move(__r)) { }
697
698 constexpr shared_ptr(nullptr_t __p)
699 : _Base_type(__p) { }
700
701 // C++14 §20.8.2.2
702 ~shared_ptr() = default;
703
704 // C++14 §20.8.2.3
705 shared_ptr& operator=(const shared_ptr&) noexcept = default;
706
707 template <typename _Tp1>
aca12aff 708 _Compatible<_Tp1, shared_ptr&>
930d5602
FY		 709 operator=(const shared_ptr<_Tp1>& __r) noexcept
710 {
711 _Base_type::operator=(__r);
712 return *this;
713 }
714
715 shared_ptr&
716 operator=(shared_ptr&& __r) noexcept
717 {
718 _Base_type::operator=(std::move(__r));
719 return *this;
720 }
721
722 template <typename _Tp1>
aca12aff 723 _Compatible<_Tp1, shared_ptr&>
930d5602
FY		 724 operator=(shared_ptr<_Tp1>&& __r) noexcept
725 {
726 _Base_type::operator=(std::move(__r));
727 return *this;
728 }
729
730#if _GLIBCXX_USE_DEPRECATED
731 template<typename _Tp1>
aca12aff 732 _Compatible<_Tp1, shared_ptr&>
930d5602
FY		 733 operator=(std::auto_ptr<_Tp1>&& __r)
734 {
735 __shared_ptr<_Tp>::operator=(std::move(__r));
736 return *this;
737 }
738#endif
739
740 template <typename _Tp1, typename _Del>
aca12aff 741 _Compatible<_Tp1, shared_ptr&>
930d5602
FY		 742 operator=(unique_ptr<_Tp1, _Del>&& __r)
743 {
744 _Base_type::operator=(std::move(__r));
745 return *this;
746 }
747
748 // C++14 §20.8.2.2.4
749 // swap & reset
750 // 8.2.1.2 shared_ptr observers
751 // in __shared_ptr
752
753 private:
754 template<typename _Alloc, typename... _Args>
755 shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
756 _Args&&... __args)
757 : _Base_type(__tag, __a, std::forward<_Args>(__args)...)
758 { }
759
760 template<typename _Tp1, typename _Alloc, typename... _Args>
761 friend shared_ptr<_Tp1>
762 allocate_shared(const _Alloc& __a, _Args&&... __args);
763
764 shared_ptr(const weak_ptr<_Tp>& __r, std::nothrow_t)
765 : _Base_type(__r, std::nothrow) { }
766
767 friend class weak_ptr<_Tp>;
768 };
769
770 // C++14 §20.8.2.2.7 //DOING
6dddab08
JW		 771 template<typename _Tp1, typename _Tp2>
772 bool operator==(const shared_ptr<_Tp1>& __a,
773 const shared_ptr<_Tp2>& __b) noexcept
774 { return __a.get() == __b.get(); }
775
776 template<typename _Tp>
777 inline bool
778 operator==(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
779 { return !__a; }
780
781 template<typename _Tp>
782 inline bool
783 operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
784 { return !__a; }
785
786 template<typename _Tp1, typename _Tp2>
787 inline bool
788 operator!=(const shared_ptr<_Tp1>& __a,
930d5602 789 const shared_ptr<_Tp2>& __b) noexcept
6dddab08
JW		 790 { return __a.get() != __b.get(); }
791
792 template<typename _Tp>
793 inline bool
794 operator!=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
795 { return (bool)__a; }
796
797 template<typename _Tp>
798 inline bool
799 operator!=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
800 { return (bool)__a; }
801
802 template<typename _Tp1, typename _Tp2>
803 inline bool
804 operator<(const shared_ptr<_Tp1>& __a,
805 const shared_ptr<_Tp2>& __b) noexcept
806 {
807 using __elem_t1 = typename shared_ptr<_Tp1>::element_type;
808 using __elem_t2 = typename shared_ptr<_Tp2>::element_type;
809 using _CT = common_type_t<__elem_t1*, __elem_t2*>;
810 return std::less<_CT>()(__a.get(), __b.get());
811 }
812
813 template<typename _Tp>
814 inline bool
815 operator<(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
816 {
817 using __elem_t = typename shared_ptr<_Tp>::element_type;
818 return std::less<__elem_t*>()(__a.get(), nullptr);
819 }
820
821 template<typename _Tp>
822 inline bool
823 operator<(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
824 {
825 using __elem_t = typename shared_ptr<_Tp>::element_type;
826 return std::less<__elem_t*>()(nullptr, __a.get());
827 }
828
829 template<typename _Tp1, typename _Tp2>
830 inline bool
831 operator<=(const shared_ptr<_Tp1>& __a,
930d5602 832 const shared_ptr<_Tp2>& __b) noexcept
6dddab08
JW		 833 { return !(__b < __a); }
834
835 template<typename _Tp>
836 inline bool
837 operator<=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
838 { return !(nullptr < __a); }
839
840 template<typename _Tp>
841 inline bool
842 operator<=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
843 { return !(__a < nullptr); }
844
845 template<typename _Tp1, typename _Tp2>
846 inline bool
847 operator>(const shared_ptr<_Tp1>& __a,
848 const shared_ptr<_Tp2>& __b) noexcept
849 { return (__b < __a); }
850
851 template<typename _Tp>
852 inline bool
853 operator>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
854 {
855 using __elem_t = typename shared_ptr<_Tp>::element_type;
856 return std::less<__elem_t*>()(nullptr, __a.get());
857 }
858
859 template<typename _Tp>
860 inline bool
861 operator>(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
862 {
863 using __elem_t = typename shared_ptr<_Tp>::element_type;
864 return std::less<__elem_t*>()(__a.get(), nullptr);
865 }
866
867 template<typename _Tp1, typename _Tp2>
868 inline bool
869 operator>=(const shared_ptr<_Tp1>& __a,
870 const shared_ptr<_Tp2>& __b) noexcept
871 { return !(__a < __b); }
872
873 template<typename _Tp>
874 inline bool
875 operator>=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
876 { return !(__a < nullptr); }
877
878 template<typename _Tp>
879 inline bool
880 operator>=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
881 { return !(nullptr < __a); }
882
883 // C++14 §20.8.2.2.8
884 template<typename _Tp>
885 inline void
886 swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b) noexcept
887 { __a.swap(__b); }
888
889 // 8.2.1.3, shared_ptr casts
890 template<typename _Tp, typename _Tp1>
891 inline shared_ptr<_Tp>
892 static_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
893 {
894 using __elem_t = typename shared_ptr<_Tp>::element_type;
895 return shared_ptr<_Tp>(__r, static_cast<__elem_t*>(__r.get()));
896 }
897
898 template<typename _Tp, typename _Tp1>
899 inline shared_ptr<_Tp>
900 dynamic_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
901 {
902 using __elem_t = typename shared_ptr<_Tp>::element_type;
903 if (_Tp* __p = dynamic_cast<__elem_t*>(__r.get()))
904 return shared_ptr<_Tp>(__r, __p);
905 return shared_ptr<_Tp>();
906 }
907
908 template<typename _Tp, typename _Tp1>
909 inline shared_ptr<_Tp>
910 const_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
911 {
912 using __elem_t = typename shared_ptr<_Tp>::element_type;
913 return shared_ptr<_Tp>(__r, const_cast<__elem_t*>(__r.get()));
914 }
915
916 template<typename _Tp, typename _Tp1>
917 inline shared_ptr<_Tp>
918 reinterpret_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
919 {
920 using __elem_t = typename shared_ptr<_Tp>::element_type;
921 return shared_ptr<_Tp>(__r, reinterpret_cast<__elem_t*>(__r.get()));
922 }
923
924 // C++14 §20.8.2.3
925 template<typename _Tp>
926 class weak_ptr : public __weak_ptr<_Tp>
927 {
aca12aff
JW		 928 template<typename _Tp1, typename _Res = void>
929 using _Compatible
930 = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
930d5602
FY		 931
932 using _Base_type = __weak_ptr<_Tp>;
933
6dddab08 934 public:
930d5602
FY		 935 constexpr weak_ptr() noexcept = default;
936
937 template<typename _Tp1, typename = _Compatible<_Tp1>>
938 weak_ptr(const shared_ptr<_Tp1>& __r) noexcept
939 : _Base_type(__r) { }
940
941 weak_ptr(const weak_ptr&) noexcept = default;
942
943 template<typename _Tp1, typename = _Compatible<_Tp1>>
944 weak_ptr(const weak_ptr<_Tp1>& __r) noexcept
945 : _Base_type(__r) { }
946
947 weak_ptr(weak_ptr&&) noexcept = default;
948
949 template<typename _Tp1, typename = _Compatible<_Tp1>>
950 weak_ptr(weak_ptr<_Tp1>&& __r) noexcept
951 : _Base_type(std::move(__r)) { }
952
953 weak_ptr&
954 operator=(const weak_ptr& __r) noexcept = default;
955
956 template<typename _Tp1>
aca12aff 957 _Compatible<_Tp1, weak_ptr&>
930d5602
FY		 958 operator=(const weak_ptr<_Tp1>& __r) noexcept
959 {
960 this->_Base_type::operator=(__r);
961 return *this;
962 }
963
964 template<typename _Tp1>
aca12aff 965 _Compatible<_Tp1, weak_ptr&>
930d5602
FY		 966 operator=(const shared_ptr<_Tp1>& __r) noexcept
967 {
968 this->_Base_type::operator=(__r);
969 return *this;
970 }
971
972 weak_ptr&
973 operator=(weak_ptr&& __r) noexcept = default;
974
975 template<typename _Tp1>
aca12aff 976 _Compatible<_Tp1, weak_ptr&>
930d5602
FY		 977 operator=(weak_ptr<_Tp1>&& __r) noexcept
978 {
979 this->_Base_type::operator=(std::move(__r));
980 return *this;
981 }
982
983 shared_ptr<_Tp>
984 lock() const noexcept
985 { return shared_ptr<_Tp>(*this, std::nothrow); }
986
987 friend class enable_shared_from_this<_Tp>;
6dddab08 988 };
930d5602 989
6dddab08
JW		 990 // C++14 §20.8.2.3.6
991 template<typename _Tp>
992 inline void
993 swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b) noexcept
994 { __a.swap(__b); }
930d5602
FY		 995
996 /// C++14 §20.8.2.2.10
997 template<typename _Del, typename _Tp, _Lock_policy _Lp>
998 inline _Del*
999 get_deleter(const __shared_ptr<_Tp, _Lp>& __p) noexcept
1000 { return std::get_deleter<_Del>(__p); }
1001
1002 // C++14 §20.8.2.2.11
1003 template<typename _Ch, typename _Tr, typename _Tp, _Lock_policy _Lp>
1004 inline std::basic_ostream<_Ch, _Tr>&
1005 operator<<(std::basic_ostream<_Ch, _Tr>& __os,
1006 const __shared_ptr<_Tp, _Lp>& __p)
1007 {
1008 __os << __p.get();
1009 return __os;
1010 }
1011
6dddab08
JW		 1012 // C++14 §20.8.2.4
1013 template<typename _Tp = void> class owner_less;
930d5602
FY		 1014
1015 /// Partial specialization of owner_less for shared_ptr.
1016 template<typename _Tp>
1017 struct owner_less<shared_ptr<_Tp>>
1018 : public _Sp_owner_less<shared_ptr<_Tp>, weak_ptr<_Tp>>
1019 { };
1020
1021 /// Partial specialization of owner_less for weak_ptr.
1022 template<typename _Tp>
1023 struct owner_less<weak_ptr<_Tp>>
1024 : public _Sp_owner_less<weak_ptr<_Tp>, shared_ptr<_Tp>>
1025 { };
1026
1027 template<>
1028 class owner_less<void>
1029 {
1030 template<typename _Tp, typename _Up>
1031 bool
1032 operator()(shared_ptr<_Tp> const& __lhs,
1033 shared_ptr<_Up> const& __rhs) const
1034 { return __lhs.owner_before(__rhs); }
1035
1036 template<typename _Tp, typename _Up>
1037 bool
1038 operator()(shared_ptr<_Tp> const& __lhs,
1039 weak_ptr<_Up> const& __rhs) const
1040 { return __lhs.owner_before(__rhs); }
1041
1042 template<typename _Tp, typename _Up>
1043 bool
1044 operator()(weak_ptr<_Tp> const& __lhs,
1045 shared_ptr<_Up> const& __rhs) const
1046 { return __lhs.owner_before(__rhs); }
1047
1048 template<typename _Tp, typename _Up>
1049 bool
1050 operator()(weak_ptr<_Tp> const& __lhs,
1051 weak_ptr<_Up> const& __rhs) const
1052 { return __lhs.owner_before(__rhs); }
1053
1054 typedef void is_transparent;
1055 };
1056
1057 // C++14 §20.8.2.6
1058 template<typename _Tp>
1059 inline bool
1060 atomic_is_lock_free(const shared_ptr<_Tp>* __p)
1061 { return std::atomic_is_lock_free<_Tp, __default_lock_policy>(__p); }
1062
1063 template<typename _Tp>
1064 shared_ptr<_Tp> atomic_load(const shared_ptr<_Tp>* __p)
1065 { return std::atomic_load<_Tp>(__p); }
1066
1067 template<typename _Tp>
1068 shared_ptr<_Tp>
1069 atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order __mo)
1070 { return std::atomic_load_explicit<_Tp>(__p, __mo); }
1071
1072 template<typename _Tp>
1073 void atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
1074 { return std::atomic_store<_Tp>(__p, __r); }
1075
1076 template<typename _Tp>
1077 shared_ptr<_Tp>
1078 atomic_store_explicit(const shared_ptr<_Tp>* __p,
1079 shared_ptr<_Tp> __r,
1080 memory_order __mo)
1081 { return std::atomic_store_explicit<_Tp>(__p, __r, __mo); }
1082
1083 template<typename _Tp>
1084 void atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
1085 { return std::atomic_exchange<_Tp>(__p, __r); }
1086
1087 template<typename _Tp>
1088 shared_ptr<_Tp>
1089 atomic_exchange_explicit(const shared_ptr<_Tp>* __p,
1090 shared_ptr<_Tp> __r,
1091 memory_order __mo)
1092 { return std::atomic_exchange_explicit<_Tp>(__p, __r, __mo); }
1093
1094 template<typename _Tp>
1095 bool atomic_compare_exchange_weak(shared_ptr<_Tp>* __p,
1096 shared_ptr<_Tp>* __v,
1097 shared_ptr<_Tp> __w)
1098 { return std::atomic_compare_exchange_weak<_Tp>(__p, __v, __w); }
1099
1100 template<typename _Tp>
1101 bool atomic_compare_exchange_strong(shared_ptr<_Tp>* __p,
1102 shared_ptr<_Tp>* __v,
1103 shared_ptr<_Tp> __w)
1104 { return std::atomic_compare_exchange_strong<_Tp>(__p, __v, __w); }
1105
1106 template<typename _Tp>
1107 bool atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p,
1108 shared_ptr<_Tp>* __v,
1109 shared_ptr<_Tp> __w,
1110 memory_order __success,
1111 memory_order __failure)
1112 { return std::atomic_compare_exchange_weak_explicit<_Tp>(__p, __v, __w,
1113 __success,
1114 __failure); }
1115
1116 template<typename _Tp>
1117 bool atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p,
1118 shared_ptr<_Tp>* __v,
1119 shared_ptr<_Tp> __w,
1120 memory_order __success,
1121 memory_order __failure)
1122 { return std::atomic_compare_exchange_strong_explicit<_Tp>(__p, __v, __w,
1123 __success,
1124 __failure); }
1125
1126 //enable_shared_from_this
1127 template<typename _Tp>
1128 class enable_shared_from_this
1129 {
1130 protected:
1131 constexpr enable_shared_from_this() noexcept { }
1132
1133 enable_shared_from_this(const enable_shared_from_this&) noexcept { }
1134
1135 enable_shared_from_this&
1136 operator=(const enable_shared_from_this&) noexcept
1137 { return *this; }
1138
1139 ~enable_shared_from_this() { }
1140
1141 public:
1142 shared_ptr<_Tp>
1143 shared_from_this()
1144 { return shared_ptr<_Tp>(this->_M_weak_this); }
1145
1146 shared_ptr<const _Tp>
1147 shared_from_this() const
1148 { return shared_ptr<const _Tp>(this->_M_weak_this); }
1149
1150 private:
1151 template<typename _Tp1>
1152 void
1153 _M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const noexcept
1154 { _M_weak_this._M_assign(__p, __n); }
1155
1156 template<typename _Tp1>
1157 friend void
1158 __enable_shared_from_this_helper(const __shared_count<>& __pn,
1159 const enable_shared_from_this* __pe,
1160 const _Tp1* __px) noexcept
1161 {
1162 if(__pe != 0)
1163 __pe->_M_weak_assign(const_cast<_Tp1*>(__px), __pn);
1164 }
1165
1166 mutable weak_ptr<_Tp> _M_weak_this;
1167 };
1168
1169_GLIBCXX_END_NAMESPACE_VERSION
1170} // namespace fundamentals_v2
1171} // namespace experimental
1172
1173_GLIBCXX_BEGIN_NAMESPACE_VERSION
1174
1175 /// std::hash specialization for shared_ptr.
1176 template<typename _Tp>
1177 struct hash<experimental::shared_ptr<_Tp>>
1178 : public __hash_base<size_t, experimental::shared_ptr<_Tp>>
1179 {
1180 size_t
1181 operator()(const experimental::shared_ptr<_Tp>& __s) const noexcept
1182 { return std::hash<_Tp*>()(__s.get()); }
1183 };
1184
1185_GLIBCXX_END_NAMESPACE_VERSION
1186} // namespace std
1187
1188#endif // __cplusplus <= 201103L
1189
1190#endif // _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H
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