1// -*- C++ -*- header.
2
3// Copyright (C) 2008-2019 Free Software Foundation, Inc.
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 include/atomic
26 * This is a Standard C++ Library header.
27 */
28
29// Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl.
30// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html
31
32#ifndef _GLIBCXX_ATOMIC
33#define _GLIBCXX_ATOMIC 1
34
35#pragma GCC system_header
36
37#if __cplusplus < 201103L
38# include <bits/c++0x_warning.h>
39#else
40
41#include <bits/atomic_base.h>
42#include <bits/move.h>
43
44namespace std _GLIBCXX_VISIBILITY(default)
45{
46_GLIBCXX_BEGIN_NAMESPACE_VERSION
47
48 /**
49 * @addtogroup atomics
50 * @{
51 */
52
53#if __cplusplus >= 201703L
54# define __cpp_lib_atomic_is_always_lock_free 201603
55#endif
56
57 template<typename _Tp>
58 struct atomic;
59
60 /// atomic<bool>
61 // NB: No operators or fetch-operations for this type.
62 template<>
63 struct atomic<bool>
64 {
65 using value_type = bool;
66
67 private:
68 __atomic_base<bool> _M_base;
69
70 public:
71 atomic() noexcept = default;
72 ~atomic() noexcept = default;
73 atomic(const atomic&) = delete;
74 atomic& operator=(const atomic&) = delete;
75 atomic& operator=(const atomic&) volatile = delete;
76
77 constexpr atomic(bool __i) noexcept : _M_base(__i) { }
78
79 bool
80 operator=(bool __i) noexcept
81 { return _M_base.operator=(__i); }
82
83 bool
84 operator=(bool __i) volatile noexcept
85 { return _M_base.operator=(__i); }
86
87 operator bool() const noexcept
88 { return _M_base.load(); }
89
90 operator bool() const volatile noexcept
91 { return _M_base.load(); }
92
93 bool
94 is_lock_free() const noexcept { return _M_base.is_lock_free(); }
95
96 bool
97 is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); }
98
99#if __cplusplus >= 201703L
100 static constexpr bool is_always_lock_free = ATOMIC_BOOL_LOCK_FREE == 2;
101#endif
102
103 void
104 store(bool __i, memory_order __m = memory_order_seq_cst) noexcept
105 { _M_base.store(__i, __m); }
106
107 void
108 store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept
109 { _M_base.store(__i, __m); }
110
111 bool
112 load(memory_order __m = memory_order_seq_cst) const noexcept
113 { return _M_base.load(__m); }
114
115 bool
116 load(memory_order __m = memory_order_seq_cst) const volatile noexcept
117 { return _M_base.load(__m); }
118
119 bool
120 exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept
121 { return _M_base.exchange(__i, __m); }
122
123 bool
124 exchange(bool __i,
125 memory_order __m = memory_order_seq_cst) volatile noexcept
126 { return _M_base.exchange(__i, __m); }
127
128 bool
129 compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
130 memory_order __m2) noexcept
131 { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
132
133 bool
134 compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
135 memory_order __m2) volatile noexcept
136 { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
137
138 bool
139 compare_exchange_weak(bool& __i1, bool __i2,
140 memory_order __m = memory_order_seq_cst) noexcept
141 { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
142
143 bool
144 compare_exchange_weak(bool& __i1, bool __i2,
145 memory_order __m = memory_order_seq_cst) volatile noexcept
146 { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
147
148 bool
149 compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
150 memory_order __m2) noexcept
151 { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
152
153 bool
154 compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
155 memory_order __m2) volatile noexcept
156 { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
157
158 bool
159 compare_exchange_strong(bool& __i1, bool __i2,
160 memory_order __m = memory_order_seq_cst) noexcept
161 { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
162
163 bool
164 compare_exchange_strong(bool& __i1, bool __i2,
165 memory_order __m = memory_order_seq_cst) volatile noexcept
166 { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
167 };
168
169
170 /**
171 * @brief Generic atomic type, primary class template.
172 *
173 * @tparam _Tp Type to be made atomic, must be trivally copyable.
174 */
175 template<typename _Tp>
176 struct atomic
177 {
178 using value_type = _Tp;
179
180 private:
181 // Align 1/2/4/8/16-byte types to at least their size.
182 static constexpr int _S_min_alignment
183 = (sizeof(_Tp) & (sizeof(_Tp) - 1)) || sizeof(_Tp) > 16
184 ? 0 : sizeof(_Tp);
185
186 static constexpr int _S_alignment
187 = _S_min_alignment > alignof(_Tp) ? _S_min_alignment : alignof(_Tp);
188
189 alignas(_S_alignment) _Tp _M_i;
190
191 static_assert(__is_trivially_copyable(_Tp),
192 "std::atomic requires a trivially copyable type");
193
194 static_assert(sizeof(_Tp) > 0,
195 "Incomplete or zero-sized types are not supported");
196
197 public:
198 atomic() noexcept = default;
199 ~atomic() noexcept = default;
200 atomic(const atomic&) = delete;
201 atomic& operator=(const atomic&) = delete;
202 atomic& operator=(const atomic&) volatile = delete;
203
204 constexpr atomic(_Tp __i) noexcept : _M_i(__i) { }
205
206 operator _Tp() const noexcept
207 { return load(); }
208
209 operator _Tp() const volatile noexcept
210 { return load(); }
211
212 _Tp
213 operator=(_Tp __i) noexcept
214 { store(__i); return __i; }
215
216 _Tp
217 operator=(_Tp __i) volatile noexcept
218 { store(__i); return __i; }
219
220 bool
221 is_lock_free() const noexcept
222 {
223 // Produce a fake, minimally aligned pointer.
224 return __atomic_is_lock_free(sizeof(_M_i),
225 reinterpret_cast<void *>(-_S_alignment));
226 }
227
228 bool
229 is_lock_free() const volatile noexcept
230 {
231 // Produce a fake, minimally aligned pointer.
232 return __atomic_is_lock_free(sizeof(_M_i),
233 reinterpret_cast<void *>(-_S_alignment));
234 }
235
236#if __cplusplus >= 201703L
237 static constexpr bool is_always_lock_free
238 = __atomic_always_lock_free(sizeof(_M_i), 0);
239#endif
240
241 void
242 store(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
243 { __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m)); }
244
245 void
246 store(_Tp __i, memory_order __m = memory_order_seq_cst) volatile noexcept
247 { __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m)); }
248
249 _Tp
250 load(memory_order __m = memory_order_seq_cst) const noexcept
251 {
252 alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
253 _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
254 __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
255 return *__ptr;
256 }
257
258 _Tp
259 load(memory_order __m = memory_order_seq_cst) const volatile noexcept
260 {
261 alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
262 _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
263 __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
264 return *__ptr;
265 }
266
267 _Tp
268 exchange(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
269 {
270 alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
271 _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
272 __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
273 __ptr, int(__m));
274 return *__ptr;
275 }
276
277 _Tp
278 exchange(_Tp __i,
279 memory_order __m = memory_order_seq_cst) volatile noexcept
280 {
281 alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
282 _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
283 __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
284 __ptr, int(__m));
285 return *__ptr;
286 }
287
288 bool
289 compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
290 memory_order __f) noexcept
291 {
292 return __atomic_compare_exchange(std::__addressof(_M_i),
293 std::__addressof(__e),
294 std::__addressof(__i),
295 true, int(__s), int(__f));
296 }
297
298 bool
299 compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
300 memory_order __f) volatile noexcept
301 {
302 return __atomic_compare_exchange(std::__addressof(_M_i),
303 std::__addressof(__e),
304 std::__addressof(__i),
305 true, int(__s), int(__f));
306 }
307
308 bool
309 compare_exchange_weak(_Tp& __e, _Tp __i,
310 memory_order __m = memory_order_seq_cst) noexcept
311 { return compare_exchange_weak(__e, __i, __m,
312 __cmpexch_failure_order(__m)); }
313
314 bool
315 compare_exchange_weak(_Tp& __e, _Tp __i,
316 memory_order __m = memory_order_seq_cst) volatile noexcept
317 { return compare_exchange_weak(__e, __i, __m,
318 __cmpexch_failure_order(__m)); }
319
320 bool
321 compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
322 memory_order __f) noexcept
323 {
324 return __atomic_compare_exchange(std::__addressof(_M_i),
325 std::__addressof(__e),
326 std::__addressof(__i),
327 false, int(__s), int(__f));
328 }
329
330 bool
331 compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
332 memory_order __f) volatile noexcept
333 {
334 return __atomic_compare_exchange(std::__addressof(_M_i),
335 std::__addressof(__e),
336 std::__addressof(__i),
337 false, int(__s), int(__f));
338 }
339
340 bool
341 compare_exchange_strong(_Tp& __e, _Tp __i,
342 memory_order __m = memory_order_seq_cst) noexcept
343 { return compare_exchange_strong(__e, __i, __m,
344 __cmpexch_failure_order(__m)); }
345
346 bool
347 compare_exchange_strong(_Tp& __e, _Tp __i,
348 memory_order __m = memory_order_seq_cst) volatile noexcept
349 { return compare_exchange_strong(__e, __i, __m,
350 __cmpexch_failure_order(__m)); }
351 };
352
353
354 /// Partial specialization for pointer types.
355 template<typename _Tp>
356 struct atomic<_Tp*>
357 {
358 using value_type = _Tp*;
359 using difference_type = ptrdiff_t;
360
361 typedef _Tp* __pointer_type;
362 typedef __atomic_base<_Tp*> __base_type;
363 __base_type _M_b;
364
365 atomic() noexcept = default;
366 ~atomic() noexcept = default;
367 atomic(const atomic&) = delete;
368 atomic& operator=(const atomic&) = delete;
369 atomic& operator=(const atomic&) volatile = delete;
370
371 constexpr atomic(__pointer_type __p) noexcept : _M_b(__p) { }
372
373 operator __pointer_type() const noexcept
374 { return __pointer_type(_M_b); }
375
376 operator __pointer_type() const volatile noexcept
377 { return __pointer_type(_M_b); }
378
379 __pointer_type
380 operator=(__pointer_type __p) noexcept
381 { return _M_b.operator=(__p); }
382
383 __pointer_type
384 operator=(__pointer_type __p) volatile noexcept
385 { return _M_b.operator=(__p); }
386
387 __pointer_type
388 operator++(int) noexcept
389 {
390#if __cplusplus >= 201703L
391 static_assert( is_object<_Tp>::value, "pointer to object type" );
392#endif
393 return _M_b++;
394 }
395
396 __pointer_type
397 operator++(int) volatile noexcept
398 {
399#if __cplusplus >= 201703L
400 static_assert( is_object<_Tp>::value, "pointer to object type" );
401#endif
402 return _M_b++;
403 }
404
405 __pointer_type
406 operator--(int) noexcept
407 {
408#if __cplusplus >= 201703L
409 static_assert( is_object<_Tp>::value, "pointer to object type" );
410#endif
411 return _M_b--;
412 }
413
414 __pointer_type
415 operator--(int) volatile noexcept
416 {
417#if __cplusplus >= 201703L
418 static_assert( is_object<_Tp>::value, "pointer to object type" );
419#endif
420 return _M_b--;
421 }
422
423 __pointer_type
424 operator++() noexcept
425 {
426#if __cplusplus >= 201703L
427 static_assert( is_object<_Tp>::value, "pointer to object type" );
428#endif
429 return ++_M_b;
430 }
431
432 __pointer_type
433 operator++() volatile noexcept
434 {
435#if __cplusplus >= 201703L
436 static_assert( is_object<_Tp>::value, "pointer to object type" );
437#endif
438 return ++_M_b;
439 }
440
441 __pointer_type
442 operator--() noexcept
443 {
444#if __cplusplus >= 201703L
445 static_assert( is_object<_Tp>::value, "pointer to object type" );
446#endif
447 return --_M_b;
448 }
449
450 __pointer_type
451 operator--() volatile noexcept
452 {
453#if __cplusplus >= 201703L
454 static_assert( is_object<_Tp>::value, "pointer to object type" );
455#endif
456 return --_M_b;
457 }
458
459 __pointer_type
460 operator+=(ptrdiff_t __d) noexcept
461 {
462#if __cplusplus >= 201703L
463 static_assert( is_object<_Tp>::value, "pointer to object type" );
464#endif
465 return _M_b.operator+=(__d);
466 }
467
468 __pointer_type
469 operator+=(ptrdiff_t __d) volatile noexcept
470 {
471#if __cplusplus >= 201703L
472 static_assert( is_object<_Tp>::value, "pointer to object type" );
473#endif
474 return _M_b.operator+=(__d);
475 }
476
477 __pointer_type
478 operator-=(ptrdiff_t __d) noexcept
479 {
480#if __cplusplus >= 201703L
481 static_assert( is_object<_Tp>::value, "pointer to object type" );
482#endif
483 return _M_b.operator-=(__d);
484 }
485
486 __pointer_type
487 operator-=(ptrdiff_t __d) volatile noexcept
488 {
489#if __cplusplus >= 201703L
490 static_assert( is_object<_Tp>::value, "pointer to object type" );
491#endif
492 return _M_b.operator-=(__d);
493 }
494
495 bool
496 is_lock_free() const noexcept
497 { return _M_b.is_lock_free(); }
498
499 bool
500 is_lock_free() const volatile noexcept
501 { return _M_b.is_lock_free(); }
502
503#if __cplusplus >= 201703L
504 static constexpr bool is_always_lock_free = ATOMIC_POINTER_LOCK_FREE == 2;
505#endif
506
507 void
508 store(__pointer_type __p,
509 memory_order __m = memory_order_seq_cst) noexcept
510 { return _M_b.store(__p, __m); }
511
512 void
513 store(__pointer_type __p,
514 memory_order __m = memory_order_seq_cst) volatile noexcept
515 { return _M_b.store(__p, __m); }
516
517 __pointer_type
518 load(memory_order __m = memory_order_seq_cst) const noexcept
519 { return _M_b.load(__m); }
520
521 __pointer_type
522 load(memory_order __m = memory_order_seq_cst) const volatile noexcept
523 { return _M_b.load(__m); }
524
525 __pointer_type
526 exchange(__pointer_type __p,
527 memory_order __m = memory_order_seq_cst) noexcept
528 { return _M_b.exchange(__p, __m); }
529
530 __pointer_type
531 exchange(__pointer_type __p,
532 memory_order __m = memory_order_seq_cst) volatile noexcept
533 { return _M_b.exchange(__p, __m); }
534
535 bool
536 compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
537 memory_order __m1, memory_order __m2) noexcept
538 { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
539
540 bool
541 compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
542 memory_order __m1,
543 memory_order __m2) volatile noexcept
544 { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
545
546 bool
547 compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
548 memory_order __m = memory_order_seq_cst) noexcept
549 {
550 return compare_exchange_weak(__p1, __p2, __m,
551 __cmpexch_failure_order(__m));
552 }
553
554 bool
555 compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
556 memory_order __m = memory_order_seq_cst) volatile noexcept
557 {
558 return compare_exchange_weak(__p1, __p2, __m,
559 __cmpexch_failure_order(__m));
560 }
561
562 bool
563 compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
564 memory_order __m1, memory_order __m2) noexcept
565 { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
566
567 bool
568 compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
569 memory_order __m1,
570 memory_order __m2) volatile noexcept
571 { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
572
573 bool
574 compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
575 memory_order __m = memory_order_seq_cst) noexcept
576 {
577 return _M_b.compare_exchange_strong(__p1, __p2, __m,
578 __cmpexch_failure_order(__m));
579 }
580
581 bool
582 compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
583 memory_order __m = memory_order_seq_cst) volatile noexcept
584 {
585 return _M_b.compare_exchange_strong(__p1, __p2, __m,
586 __cmpexch_failure_order(__m));
587 }
588
589 __pointer_type
590 fetch_add(ptrdiff_t __d,
591 memory_order __m = memory_order_seq_cst) noexcept
592 {
593#if __cplusplus >= 201703L
594 static_assert( is_object<_Tp>::value, "pointer to object type" );
595#endif
596 return _M_b.fetch_add(__d, __m);
597 }
598
599 __pointer_type
600 fetch_add(ptrdiff_t __d,
601 memory_order __m = memory_order_seq_cst) volatile noexcept
602 {
603#if __cplusplus >= 201703L
604 static_assert( is_object<_Tp>::value, "pointer to object type" );
605#endif
606 return _M_b.fetch_add(__d, __m);
607 }
608
609 __pointer_type
610 fetch_sub(ptrdiff_t __d,
611 memory_order __m = memory_order_seq_cst) noexcept
612 {
613#if __cplusplus >= 201703L
614 static_assert( is_object<_Tp>::value, "pointer to object type" );
615#endif
616 return _M_b.fetch_sub(__d, __m);
617 }
618
619 __pointer_type
620 fetch_sub(ptrdiff_t __d,
621 memory_order __m = memory_order_seq_cst) volatile noexcept
622 {
623#if __cplusplus >= 201703L
624 static_assert( is_object<_Tp>::value, "pointer to object type" );
625#endif
626 return _M_b.fetch_sub(__d, __m);
627 }
628 };
629
630
631 /// Explicit specialization for char.
632 template<>
633 struct atomic<char> : __atomic_base<char>
634 {
635 typedef char __integral_type;
636 typedef __atomic_base<char> __base_type;
637
638 atomic() noexcept = default;
639 ~atomic() noexcept = default;
640 atomic(const atomic&) = delete;
641 atomic& operator=(const atomic&) = delete;
642 atomic& operator=(const atomic&) volatile = delete;
643
644 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
645
646 using __base_type::operator __integral_type;
647 using __base_type::operator=;
648
649#if __cplusplus >= 201703L
650 static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
651#endif
652 };
653
654 /// Explicit specialization for signed char.
655 template<>
656 struct atomic<signed char> : __atomic_base<signed char>
657 {
658 typedef signed char __integral_type;
659 typedef __atomic_base<signed char> __base_type;
660
661 atomic() noexcept= default;
662 ~atomic() noexcept = default;
663 atomic(const atomic&) = delete;
664 atomic& operator=(const atomic&) = delete;
665 atomic& operator=(const atomic&) volatile = delete;
666
667 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
668
669 using __base_type::operator __integral_type;
670 using __base_type::operator=;
671
672#if __cplusplus >= 201703L
673 static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
674#endif
675 };
676
677 /// Explicit specialization for unsigned char.
678 template<>
679 struct atomic<unsigned char> : __atomic_base<unsigned char>
680 {
681 typedef unsigned char __integral_type;
682 typedef __atomic_base<unsigned char> __base_type;
683
684 atomic() noexcept= default;
685 ~atomic() noexcept = default;
686 atomic(const atomic&) = delete;
687 atomic& operator=(const atomic&) = delete;
688 atomic& operator=(const atomic&) volatile = delete;
689
690 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
691
692 using __base_type::operator __integral_type;
693 using __base_type::operator=;
694
695#if __cplusplus >= 201703L
696 static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
697#endif
698 };
699
700 /// Explicit specialization for short.
701 template<>
702 struct atomic<short> : __atomic_base<short>
703 {
704 typedef short __integral_type;
705 typedef __atomic_base<short> __base_type;
706
707 atomic() noexcept = default;
708 ~atomic() noexcept = default;
709 atomic(const atomic&) = delete;
710 atomic& operator=(const atomic&) = delete;
711 atomic& operator=(const atomic&) volatile = delete;
712
713 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
714
715 using __base_type::operator __integral_type;
716 using __base_type::operator=;
717
718#if __cplusplus >= 201703L
719 static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
720#endif
721 };
722
723 /// Explicit specialization for unsigned short.
724 template<>
725 struct atomic<unsigned short> : __atomic_base<unsigned short>
726 {
727 typedef unsigned short __integral_type;
728 typedef __atomic_base<unsigned short> __base_type;
729
730 atomic() noexcept = default;
731 ~atomic() noexcept = default;
732 atomic(const atomic&) = delete;
733 atomic& operator=(const atomic&) = delete;
734 atomic& operator=(const atomic&) volatile = delete;
735
736 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
737
738 using __base_type::operator __integral_type;
739 using __base_type::operator=;
740
741#if __cplusplus >= 201703L
742 static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
743#endif
744 };
745
746 /// Explicit specialization for int.
747 template<>
748 struct atomic<int> : __atomic_base<int>
749 {
750 typedef int __integral_type;
751 typedef __atomic_base<int> __base_type;
752
753 atomic() noexcept = default;
754 ~atomic() noexcept = default;
755 atomic(const atomic&) = delete;
756 atomic& operator=(const atomic&) = delete;
757 atomic& operator=(const atomic&) volatile = delete;
758
759 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
760
761 using __base_type::operator __integral_type;
762 using __base_type::operator=;
763
764#if __cplusplus >= 201703L
765 static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
766#endif
767 };
768
769 /// Explicit specialization for unsigned int.
770 template<>
771 struct atomic<unsigned int> : __atomic_base<unsigned int>
772 {
773 typedef unsigned int __integral_type;
774 typedef __atomic_base<unsigned int> __base_type;
775
776 atomic() noexcept = default;
777 ~atomic() noexcept = default;
778 atomic(const atomic&) = delete;
779 atomic& operator=(const atomic&) = delete;
780 atomic& operator=(const atomic&) volatile = delete;
781
782 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
783
784 using __base_type::operator __integral_type;
785 using __base_type::operator=;
786
787#if __cplusplus >= 201703L
788 static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
789#endif
790 };
791
792 /// Explicit specialization for long.
793 template<>
794 struct atomic<long> : __atomic_base<long>
795 {
796 typedef long __integral_type;
797 typedef __atomic_base<long> __base_type;
798
799 atomic() noexcept = default;
800 ~atomic() noexcept = default;
801 atomic(const atomic&) = delete;
802 atomic& operator=(const atomic&) = delete;
803 atomic& operator=(const atomic&) volatile = delete;
804
805 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
806
807 using __base_type::operator __integral_type;
808 using __base_type::operator=;
809
810#if __cplusplus >= 201703L
811 static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
812#endif
813 };
814
815 /// Explicit specialization for unsigned long.
816 template<>
817 struct atomic<unsigned long> : __atomic_base<unsigned long>
818 {
819 typedef unsigned long __integral_type;
820 typedef __atomic_base<unsigned long> __base_type;
821
822 atomic() noexcept = default;
823 ~atomic() noexcept = default;
824 atomic(const atomic&) = delete;
825 atomic& operator=(const atomic&) = delete;
826 atomic& operator=(const atomic&) volatile = delete;
827
828 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
829
830 using __base_type::operator __integral_type;
831 using __base_type::operator=;
832
833#if __cplusplus >= 201703L
834 static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
835#endif
836 };
837
838 /// Explicit specialization for long long.
839 template<>
840 struct atomic<long long> : __atomic_base<long long>
841 {
842 typedef long long __integral_type;
843 typedef __atomic_base<long long> __base_type;
844
845 atomic() noexcept = default;
846 ~atomic() noexcept = default;
847 atomic(const atomic&) = delete;
848 atomic& operator=(const atomic&) = delete;
849 atomic& operator=(const atomic&) volatile = delete;
850
851 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
852
853 using __base_type::operator __integral_type;
854 using __base_type::operator=;
855
856#if __cplusplus >= 201703L
857 static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
858#endif
859 };
860
861 /// Explicit specialization for unsigned long long.
862 template<>
863 struct atomic<unsigned long long> : __atomic_base<unsigned long long>
864 {
865 typedef unsigned long long __integral_type;
866 typedef __atomic_base<unsigned long long> __base_type;
867
868 atomic() noexcept = default;
869 ~atomic() noexcept = default;
870 atomic(const atomic&) = delete;
871 atomic& operator=(const atomic&) = delete;
872 atomic& operator=(const atomic&) volatile = delete;
873
874 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
875
876 using __base_type::operator __integral_type;
877 using __base_type::operator=;
878
879#if __cplusplus >= 201703L
880 static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
881#endif
882 };
883
884 /// Explicit specialization for wchar_t.
885 template<>
886 struct atomic<wchar_t> : __atomic_base<wchar_t>
887 {
888 typedef wchar_t __integral_type;
889 typedef __atomic_base<wchar_t> __base_type;
890
891 atomic() noexcept = default;
892 ~atomic() noexcept = default;
893 atomic(const atomic&) = delete;
894 atomic& operator=(const atomic&) = delete;
895 atomic& operator=(const atomic&) volatile = delete;
896
897 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
898
899 using __base_type::operator __integral_type;
900 using __base_type::operator=;
901
902#if __cplusplus >= 201703L
903 static constexpr bool is_always_lock_free = ATOMIC_WCHAR_T_LOCK_FREE == 2;
904#endif
905 };
906
907#ifdef _GLIBCXX_USE_CHAR8_T
908 /// Explicit specialization for char8_t.
909 template<>
910 struct atomic<char8_t> : __atomic_base<char8_t>
911 {
912 typedef char8_t __integral_type;
913 typedef __atomic_base<char8_t> __base_type;
914
915 atomic() noexcept = default;
916 ~atomic() noexcept = default;
917 atomic(const atomic&) = delete;
918 atomic& operator=(const atomic&) = delete;
919 atomic& operator=(const atomic&) volatile = delete;
920
921 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
922
923 using __base_type::operator __integral_type;
924 using __base_type::operator=;
925
926#if __cplusplus > 201402L
927 static constexpr bool is_always_lock_free = ATOMIC_CHAR8_T_LOCK_FREE == 2;
928#endif
929 };
930#endif
931
932 /// Explicit specialization for char16_t.
933 template<>
934 struct atomic<char16_t> : __atomic_base<char16_t>
935 {
936 typedef char16_t __integral_type;
937 typedef __atomic_base<char16_t> __base_type;
938
939 atomic() noexcept = default;
940 ~atomic() noexcept = default;
941 atomic(const atomic&) = delete;
942 atomic& operator=(const atomic&) = delete;
943 atomic& operator=(const atomic&) volatile = delete;
944
945 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
946
947 using __base_type::operator __integral_type;
948 using __base_type::operator=;
949
950#if __cplusplus >= 201703L
951 static constexpr bool is_always_lock_free = ATOMIC_CHAR16_T_LOCK_FREE == 2;
952#endif
953 };
954
955 /// Explicit specialization for char32_t.
956 template<>
957 struct atomic<char32_t> : __atomic_base<char32_t>
958 {
959 typedef char32_t __integral_type;
960 typedef __atomic_base<char32_t> __base_type;
961
962 atomic() noexcept = default;
963 ~atomic() noexcept = default;
964 atomic(const atomic&) = delete;
965 atomic& operator=(const atomic&) = delete;
966 atomic& operator=(const atomic&) volatile = delete;
967
968 constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
969
970 using __base_type::operator __integral_type;
971 using __base_type::operator=;
972
973#if __cplusplus >= 201703L
974 static constexpr bool is_always_lock_free = ATOMIC_CHAR32_T_LOCK_FREE == 2;
975#endif
976 };
977
978
979 /// atomic_bool
980 typedef atomic<bool> atomic_bool;
981
982 /// atomic_char
983 typedef atomic<char> atomic_char;
984
985 /// atomic_schar
986 typedef atomic<signed char> atomic_schar;
987
988 /// atomic_uchar
989 typedef atomic<unsigned char> atomic_uchar;
990
991 /// atomic_short
992 typedef atomic<short> atomic_short;
993
994 /// atomic_ushort
995 typedef atomic<unsigned short> atomic_ushort;
996
997 /// atomic_int
998 typedef atomic<int> atomic_int;
999
1000 /// atomic_uint
1001 typedef atomic<unsigned int> atomic_uint;
1002
1003 /// atomic_long
1004 typedef atomic<long> atomic_long;
1005
1006 /// atomic_ulong
1007 typedef atomic<unsigned long> atomic_ulong;
1008
1009 /// atomic_llong
1010 typedef atomic<long long> atomic_llong;
1011
1012 /// atomic_ullong
1013 typedef atomic<unsigned long long> atomic_ullong;
1014
1015 /// atomic_wchar_t
1016 typedef atomic<wchar_t> atomic_wchar_t;
1017
1018#ifdef _GLIBCXX_USE_CHAR8_T
1019 /// atomic_char8_t
1020 typedef atomic<char8_t> atomic_char8_t;
1021#endif
1022
1023 /// atomic_char16_t
1024 typedef atomic<char16_t> atomic_char16_t;
1025
1026 /// atomic_char32_t
1027 typedef atomic<char32_t> atomic_char32_t;
1028
1029#ifdef _GLIBCXX_USE_C99_STDINT_TR1
1030 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1031 // 2441. Exact-width atomic typedefs should be provided
1032
1033 /// atomic_int8_t
1034 typedef atomic<int8_t> atomic_int8_t;
1035
1036 /// atomic_uint8_t
1037 typedef atomic<uint8_t> atomic_uint8_t;
1038
1039 /// atomic_int16_t
1040 typedef atomic<int16_t> atomic_int16_t;
1041
1042 /// atomic_uint16_t
1043 typedef atomic<uint16_t> atomic_uint16_t;
1044
1045 /// atomic_int32_t
1046 typedef atomic<int32_t> atomic_int32_t;
1047
1048 /// atomic_uint32_t
1049 typedef atomic<uint32_t> atomic_uint32_t;
1050
1051 /// atomic_int64_t
1052 typedef atomic<int64_t> atomic_int64_t;
1053
1054 /// atomic_uint64_t
1055 typedef atomic<uint64_t> atomic_uint64_t;
1056
1057
1058 /// atomic_int_least8_t
1059 typedef atomic<int_least8_t> atomic_int_least8_t;
1060
1061 /// atomic_uint_least8_t
1062 typedef atomic<uint_least8_t> atomic_uint_least8_t;
1063
1064 /// atomic_int_least16_t
1065 typedef atomic<int_least16_t> atomic_int_least16_t;
1066
1067 /// atomic_uint_least16_t
1068 typedef atomic<uint_least16_t> atomic_uint_least16_t;
1069
1070 /// atomic_int_least32_t
1071 typedef atomic<int_least32_t> atomic_int_least32_t;
1072
1073 /// atomic_uint_least32_t
1074 typedef atomic<uint_least32_t> atomic_uint_least32_t;
1075
1076 /// atomic_int_least64_t
1077 typedef atomic<int_least64_t> atomic_int_least64_t;
1078
1079 /// atomic_uint_least64_t
1080 typedef atomic<uint_least64_t> atomic_uint_least64_t;
1081
1082
1083 /// atomic_int_fast8_t
1084 typedef atomic<int_fast8_t> atomic_int_fast8_t;
1085
1086 /// atomic_uint_fast8_t
1087 typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
1088
1089 /// atomic_int_fast16_t
1090 typedef atomic<int_fast16_t> atomic_int_fast16_t;
1091
1092 /// atomic_uint_fast16_t
1093 typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
1094
1095 /// atomic_int_fast32_t
1096 typedef atomic<int_fast32_t> atomic_int_fast32_t;
1097
1098 /// atomic_uint_fast32_t
1099 typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
1100
1101 /// atomic_int_fast64_t
1102 typedef atomic<int_fast64_t> atomic_int_fast64_t;
1103
1104 /// atomic_uint_fast64_t
1105 typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
1106#endif
1107
1108
1109 /// atomic_intptr_t
1110 typedef atomic<intptr_t> atomic_intptr_t;
1111
1112 /// atomic_uintptr_t
1113 typedef atomic<uintptr_t> atomic_uintptr_t;
1114
1115 /// atomic_size_t
1116 typedef atomic<size_t> atomic_size_t;
1117
1118 /// atomic_ptrdiff_t
1119 typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
1120
1121#ifdef _GLIBCXX_USE_C99_STDINT_TR1
1122 /// atomic_intmax_t
1123 typedef atomic<intmax_t> atomic_intmax_t;
1124
1125 /// atomic_uintmax_t
1126 typedef atomic<uintmax_t> atomic_uintmax_t;
1127#endif
1128
1129 // Function definitions, atomic_flag operations.
1130 inline bool
1131 atomic_flag_test_and_set_explicit(atomic_flag* __a,
1132 memory_order __m) noexcept
1133 { return __a->test_and_set(__m); }
1134
1135 inline bool
1136 atomic_flag_test_and_set_explicit(volatile atomic_flag* __a,
1137 memory_order __m) noexcept
1138 { return __a->test_and_set(__m); }
1139
1140 inline void
1141 atomic_flag_clear_explicit(atomic_flag* __a, memory_order __m) noexcept
1142 { __a->clear(__m); }
1143
1144 inline void
1145 atomic_flag_clear_explicit(volatile atomic_flag* __a,
1146 memory_order __m) noexcept
1147 { __a->clear(__m); }
1148
1149 inline bool
1150 atomic_flag_test_and_set(atomic_flag* __a) noexcept
1151 { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
1152
1153 inline bool
1154 atomic_flag_test_and_set(volatile atomic_flag* __a) noexcept
1155 { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
1156
1157 inline void
1158 atomic_flag_clear(atomic_flag* __a) noexcept
1159 { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
1160
1161 inline void
1162 atomic_flag_clear(volatile atomic_flag* __a) noexcept
1163 { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
1164
1165
1166 template<typename _Tp>
1167 using __atomic_val_t = typename atomic<_Tp>::value_type;
1168 template<typename _Tp>
1169 using __atomic_diff_t = typename atomic<_Tp>::difference_type;
1170
1171 // [atomics.nonmembers] Non-member functions.
1172 // Function templates generally applicable to atomic types.
1173 template<typename _ITp>
1174 inline bool
1175 atomic_is_lock_free(const atomic<_ITp>* __a) noexcept
1176 { return __a->is_lock_free(); }
1177
1178 template<typename _ITp>
1179 inline bool
1180 atomic_is_lock_free(const volatile atomic<_ITp>* __a) noexcept
1181 { return __a->is_lock_free(); }
1182
1183 template<typename _ITp>
1184 inline void
1185 atomic_init(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
1186 { __a->store(__i, memory_order_relaxed); }
1187
1188 template<typename _ITp>
1189 inline void
1190 atomic_init(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
1191 { __a->store(__i, memory_order_relaxed); }
1192
1193 template<typename _ITp>
1194 inline void
1195 atomic_store_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
1196 memory_order __m) noexcept
1197 { __a->store(__i, __m); }
1198
1199 template<typename _ITp>
1200 inline void
1201 atomic_store_explicit(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
1202 memory_order __m) noexcept
1203 { __a->store(__i, __m); }
1204
1205 template<typename _ITp>
1206 inline _ITp
1207 atomic_load_explicit(const atomic<_ITp>* __a, memory_order __m) noexcept
1208 { return __a->load(__m); }
1209
1210 template<typename _ITp>
1211 inline _ITp
1212 atomic_load_explicit(const volatile atomic<_ITp>* __a,
1213 memory_order __m) noexcept
1214 { return __a->load(__m); }
1215
1216 template<typename _ITp>
1217 inline _ITp
1218 atomic_exchange_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
1219 memory_order __m) noexcept
1220 { return __a->exchange(__i, __m); }
1221
1222 template<typename _ITp>
1223 inline _ITp
1224 atomic_exchange_explicit(volatile atomic<_ITp>* __a,
1225 __atomic_val_t<_ITp> __i,
1226 memory_order __m) noexcept
1227 { return __a->exchange(__i, __m); }
1228
1229 template<typename _ITp>
1230 inline bool
1231 atomic_compare_exchange_weak_explicit(atomic<_ITp>* __a,
1232 __atomic_val_t<_ITp>* __i1,
1233 __atomic_val_t<_ITp> __i2,
1234 memory_order __m1,
1235 memory_order __m2) noexcept
1236 { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
1237
1238 template<typename _ITp>
1239 inline bool
1240 atomic_compare_exchange_weak_explicit(volatile atomic<_ITp>* __a,
1241 __atomic_val_t<_ITp>* __i1,
1242 __atomic_val_t<_ITp> __i2,
1243 memory_order __m1,
1244 memory_order __m2) noexcept
1245 { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
1246
1247 template<typename _ITp>
1248 inline bool
1249 atomic_compare_exchange_strong_explicit(atomic<_ITp>* __a,
1250 __atomic_val_t<_ITp>* __i1,
1251 __atomic_val_t<_ITp> __i2,
1252 memory_order __m1,
1253 memory_order __m2) noexcept
1254 { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
1255
1256 template<typename _ITp>
1257 inline bool
1258 atomic_compare_exchange_strong_explicit(volatile atomic<_ITp>* __a,
1259 __atomic_val_t<_ITp>* __i1,
1260 __atomic_val_t<_ITp> __i2,
1261 memory_order __m1,
1262 memory_order __m2) noexcept
1263 { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
1264
1265
1266 template<typename _ITp>
1267 inline void
1268 atomic_store(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
1269 { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
1270
1271 template<typename _ITp>
1272 inline void
1273 atomic_store(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
1274 { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
1275
1276 template<typename _ITp>
1277 inline _ITp
1278 atomic_load(const atomic<_ITp>* __a) noexcept
1279 { return atomic_load_explicit(__a, memory_order_seq_cst); }
1280
1281 template<typename _ITp>
1282 inline _ITp
1283 atomic_load(const volatile atomic<_ITp>* __a) noexcept
1284 { return atomic_load_explicit(__a, memory_order_seq_cst); }
1285
1286 template<typename _ITp>
1287 inline _ITp
1288 atomic_exchange(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
1289 { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
1290
1291 template<typename _ITp>
1292 inline _ITp
1293 atomic_exchange(volatile atomic<_ITp>* __a,
1294 __atomic_val_t<_ITp> __i) noexcept
1295 { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
1296
1297 template<typename _ITp>
1298 inline bool
1299 atomic_compare_exchange_weak(atomic<_ITp>* __a,
1300 __atomic_val_t<_ITp>* __i1,
1301 __atomic_val_t<_ITp> __i2) noexcept
1302 {
1303 return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
1304 memory_order_seq_cst,
1305 memory_order_seq_cst);
1306 }
1307
1308 template<typename _ITp>
1309 inline bool
1310 atomic_compare_exchange_weak(volatile atomic<_ITp>* __a,
1311 __atomic_val_t<_ITp>* __i1,
1312 __atomic_val_t<_ITp> __i2) noexcept
1313 {
1314 return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
1315 memory_order_seq_cst,
1316 memory_order_seq_cst);
1317 }
1318
1319 template<typename _ITp>
1320 inline bool
1321 atomic_compare_exchange_strong(atomic<_ITp>* __a,
1322 __atomic_val_t<_ITp>* __i1,
1323 __atomic_val_t<_ITp> __i2) noexcept
1324 {
1325 return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
1326 memory_order_seq_cst,
1327 memory_order_seq_cst);
1328 }
1329
1330 template<typename _ITp>
1331 inline bool
1332 atomic_compare_exchange_strong(volatile atomic<_ITp>* __a,
1333 __atomic_val_t<_ITp>* __i1,
1334 __atomic_val_t<_ITp> __i2) noexcept
1335 {
1336 return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
1337 memory_order_seq_cst,
1338 memory_order_seq_cst);
1339 }
1340
1341 // Function templates for atomic_integral and atomic_pointer operations only.
1342 // Some operations (and, or, xor) are only available for atomic integrals,
1343 // which is implemented by taking a parameter of type __atomic_base<_ITp>*.
1344
1345 template<typename _ITp>
1346 inline _ITp
1347 atomic_fetch_add_explicit(atomic<_ITp>* __a,
1348 __atomic_diff_t<_ITp> __i,
1349 memory_order __m) noexcept
1350 { return __a->fetch_add(__i, __m); }
1351
1352 template<typename _ITp>
1353 inline _ITp
1354 atomic_fetch_add_explicit(volatile atomic<_ITp>* __a,
1355 __atomic_diff_t<_ITp> __i,
1356 memory_order __m) noexcept
1357 { return __a->fetch_add(__i, __m); }
1358
1359 template<typename _ITp>
1360 inline _ITp
1361 atomic_fetch_sub_explicit(atomic<_ITp>* __a,
1362 __atomic_diff_t<_ITp> __i,
1363 memory_order __m) noexcept
1364 { return __a->fetch_sub(__i, __m); }
1365
1366 template<typename _ITp>
1367 inline _ITp
1368 atomic_fetch_sub_explicit(volatile atomic<_ITp>* __a,
1369 __atomic_diff_t<_ITp> __i,
1370 memory_order __m) noexcept
1371 { return __a->fetch_sub(__i, __m); }
1372
1373 template<typename _ITp>
1374 inline _ITp
1375 atomic_fetch_and_explicit(__atomic_base<_ITp>* __a,
1376 __atomic_val_t<_ITp> __i,
1377 memory_order __m) noexcept
1378 { return __a->fetch_and(__i, __m); }
1379
1380 template<typename _ITp>
1381 inline _ITp
1382 atomic_fetch_and_explicit(volatile __atomic_base<_ITp>* __a,
1383 __atomic_val_t<_ITp> __i,
1384 memory_order __m) noexcept
1385 { return __a->fetch_and(__i, __m); }
1386
1387 template<typename _ITp>
1388 inline _ITp
1389 atomic_fetch_or_explicit(__atomic_base<_ITp>* __a,
1390 __atomic_val_t<_ITp> __i,
1391 memory_order __m) noexcept
1392 { return __a->fetch_or(__i, __m); }
1393
1394 template<typename _ITp>
1395 inline _ITp
1396 atomic_fetch_or_explicit(volatile __atomic_base<_ITp>* __a,
1397 __atomic_val_t<_ITp> __i,
1398 memory_order __m) noexcept
1399 { return __a->fetch_or(__i, __m); }
1400
1401 template<typename _ITp>
1402 inline _ITp
1403 atomic_fetch_xor_explicit(__atomic_base<_ITp>* __a,
1404 __atomic_val_t<_ITp> __i,
1405 memory_order __m) noexcept
1406 { return __a->fetch_xor(__i, __m); }
1407
1408 template<typename _ITp>
1409 inline _ITp
1410 atomic_fetch_xor_explicit(volatile __atomic_base<_ITp>* __a,
1411 __atomic_val_t<_ITp> __i,
1412 memory_order __m) noexcept
1413 { return __a->fetch_xor(__i, __m); }
1414
1415 template<typename _ITp>
1416 inline _ITp
1417 atomic_fetch_add(atomic<_ITp>* __a,
1418 __atomic_diff_t<_ITp> __i) noexcept
1419 { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
1420
1421 template<typename _ITp>
1422 inline _ITp
1423 atomic_fetch_add(volatile atomic<_ITp>* __a,
1424 __atomic_diff_t<_ITp> __i) noexcept
1425 { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
1426
1427 template<typename _ITp>
1428 inline _ITp
1429 atomic_fetch_sub(atomic<_ITp>* __a,
1430 __atomic_diff_t<_ITp> __i) noexcept
1431 { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
1432
1433 template<typename _ITp>
1434 inline _ITp
1435 atomic_fetch_sub(volatile atomic<_ITp>* __a,
1436 __atomic_diff_t<_ITp> __i) noexcept
1437 { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
1438
1439 template<typename _ITp>
1440 inline _ITp
1441 atomic_fetch_and(__atomic_base<_ITp>* __a,
1442 __atomic_val_t<_ITp> __i) noexcept
1443 { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
1444
1445 template<typename _ITp>
1446 inline _ITp
1447 atomic_fetch_and(volatile __atomic_base<_ITp>* __a,
1448 __atomic_val_t<_ITp> __i) noexcept
1449 { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
1450
1451 template<typename _ITp>
1452 inline _ITp
1453 atomic_fetch_or(__atomic_base<_ITp>* __a,
1454 __atomic_val_t<_ITp> __i) noexcept
1455 { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
1456
1457 template<typename _ITp>
1458 inline _ITp
1459 atomic_fetch_or(volatile __atomic_base<_ITp>* __a,
1460 __atomic_val_t<_ITp> __i) noexcept
1461 { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
1462
1463 template<typename _ITp>
1464 inline _ITp
1465 atomic_fetch_xor(__atomic_base<_ITp>* __a,
1466 __atomic_val_t<_ITp> __i) noexcept
1467 { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
1468
1469 template<typename _ITp>
1470 inline _ITp
1471 atomic_fetch_xor(volatile __atomic_base<_ITp>* __a,
1472 __atomic_val_t<_ITp> __i) noexcept
1473 { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
1474
1475 // @} group atomics
1476
1477_GLIBCXX_END_NAMESPACE_VERSION
1478} // namespace
1479
1480#endif // C++11
1481
1482#endif // _GLIBCXX_ATOMIC
1483