forked from emscripten-core/emscripten
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathfuture
More file actions
2608 lines (2254 loc) · 70.7 KB
/
future
File metadata and controls
2608 lines (2254 loc) · 70.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// -*- C++ -*-
//===--------------------------- future -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_FUTURE
#define _LIBCPP_FUTURE
/*
future synopsis
namespace std
{
enum class future_errc
{
future_already_retrieved = 1,
promise_already_satisfied,
no_state,
broken_promise
};
enum class launch
{
async = 1,
deferred = 2,
any = async | deferred
};
enum class future_status
{
ready,
timeout,
deferred
};
template <> struct is_error_code_enum<future_errc> : public true_type { };
error_code make_error_code(future_errc e) noexcept;
error_condition make_error_condition(future_errc e) noexcept;
const error_category& future_category() noexcept;
class future_error
: public logic_error
{
public:
future_error(error_code ec); // exposition only
explicit future_error(future_errc); // C++17
const error_code& code() const noexcept;
const char* what() const noexcept;
};
template <class R>
class promise
{
public:
promise();
template <class Allocator>
promise(allocator_arg_t, const Allocator& a);
promise(promise&& rhs) noexcept;
promise(const promise& rhs) = delete;
~promise();
// assignment
promise& operator=(promise&& rhs) noexcept;
promise& operator=(const promise& rhs) = delete;
void swap(promise& other) noexcept;
// retrieving the result
future<R> get_future();
// setting the result
void set_value(const R& r);
void set_value(R&& r);
void set_exception(exception_ptr p);
// setting the result with deferred notification
void set_value_at_thread_exit(const R& r);
void set_value_at_thread_exit(R&& r);
void set_exception_at_thread_exit(exception_ptr p);
};
template <class R>
class promise<R&>
{
public:
promise();
template <class Allocator>
promise(allocator_arg_t, const Allocator& a);
promise(promise&& rhs) noexcept;
promise(const promise& rhs) = delete;
~promise();
// assignment
promise& operator=(promise&& rhs) noexcept;
promise& operator=(const promise& rhs) = delete;
void swap(promise& other) noexcept;
// retrieving the result
future<R&> get_future();
// setting the result
void set_value(R& r);
void set_exception(exception_ptr p);
// setting the result with deferred notification
void set_value_at_thread_exit(R&);
void set_exception_at_thread_exit(exception_ptr p);
};
template <>
class promise<void>
{
public:
promise();
template <class Allocator>
promise(allocator_arg_t, const Allocator& a);
promise(promise&& rhs) noexcept;
promise(const promise& rhs) = delete;
~promise();
// assignment
promise& operator=(promise&& rhs) noexcept;
promise& operator=(const promise& rhs) = delete;
void swap(promise& other) noexcept;
// retrieving the result
future<void> get_future();
// setting the result
void set_value();
void set_exception(exception_ptr p);
// setting the result with deferred notification
void set_value_at_thread_exit();
void set_exception_at_thread_exit(exception_ptr p);
};
template <class R> void swap(promise<R>& x, promise<R>& y) noexcept;
template <class R, class Alloc>
struct uses_allocator<promise<R>, Alloc> : public true_type {};
template <class R>
class future
{
public:
future() noexcept;
future(future&&) noexcept;
future(const future& rhs) = delete;
~future();
future& operator=(const future& rhs) = delete;
future& operator=(future&&) noexcept;
shared_future<R> share() noexcept;
// retrieving the value
R get();
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <class R>
class future<R&>
{
public:
future() noexcept;
future(future&&) noexcept;
future(const future& rhs) = delete;
~future();
future& operator=(const future& rhs) = delete;
future& operator=(future&&) noexcept;
shared_future<R&> share() noexcept;
// retrieving the value
R& get();
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <>
class future<void>
{
public:
future() noexcept;
future(future&&) noexcept;
future(const future& rhs) = delete;
~future();
future& operator=(const future& rhs) = delete;
future& operator=(future&&) noexcept;
shared_future<void> share() noexcept;
// retrieving the value
void get();
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <class R>
class shared_future
{
public:
shared_future() noexcept;
shared_future(const shared_future& rhs);
shared_future(future<R>&&) noexcept;
shared_future(shared_future&& rhs) noexcept;
~shared_future();
shared_future& operator=(const shared_future& rhs);
shared_future& operator=(shared_future&& rhs) noexcept;
// retrieving the value
const R& get() const;
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <class R>
class shared_future<R&>
{
public:
shared_future() noexcept;
shared_future(const shared_future& rhs);
shared_future(future<R&>&&) noexcept;
shared_future(shared_future&& rhs) noexcept;
~shared_future();
shared_future& operator=(const shared_future& rhs);
shared_future& operator=(shared_future&& rhs) noexcept;
// retrieving the value
R& get() const;
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <>
class shared_future<void>
{
public:
shared_future() noexcept;
shared_future(const shared_future& rhs);
shared_future(future<void>&&) noexcept;
shared_future(shared_future&& rhs) noexcept;
~shared_future();
shared_future& operator=(const shared_future& rhs);
shared_future& operator=(shared_future&& rhs) noexcept;
// retrieving the value
void get() const;
// functions to check state
bool valid() const noexcept;
void wait() const;
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const;
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
};
template <class F, class... Args>
future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type>
async(F&& f, Args&&... args);
template <class F, class... Args>
future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type>
async(launch policy, F&& f, Args&&... args);
template <class> class packaged_task; // undefined
template <class R, class... ArgTypes>
class packaged_task<R(ArgTypes...)>
{
public:
typedef R result_type; // extension
// construction and destruction
packaged_task() noexcept;
template <class F>
explicit packaged_task(F&& f);
template <class F, class Allocator>
packaged_task(allocator_arg_t, const Allocator& a, F&& f);
~packaged_task();
// no copy
packaged_task(const packaged_task&) = delete;
packaged_task& operator=(const packaged_task&) = delete;
// move support
packaged_task(packaged_task&& other) noexcept;
packaged_task& operator=(packaged_task&& other) noexcept;
void swap(packaged_task& other) noexcept;
bool valid() const noexcept;
// result retrieval
future<R> get_future();
// execution
void operator()(ArgTypes... );
void make_ready_at_thread_exit(ArgTypes...);
void reset();
};
template <class R>
void swap(packaged_task<R(ArgTypes...)&, packaged_task<R(ArgTypes...)>&) noexcept;
template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>;
} // std
*/
#include <__config>
#include <system_error>
#include <memory>
#include <chrono>
#include <exception>
#include <mutex>
#include <thread>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
#ifdef _LIBCPP_HAS_NO_THREADS
#error <future> is not supported on this single threaded system
#else // !_LIBCPP_HAS_NO_THREADS
_LIBCPP_BEGIN_NAMESPACE_STD
//enum class future_errc
_LIBCPP_DECLARE_STRONG_ENUM(future_errc)
{
future_already_retrieved = 1,
promise_already_satisfied,
no_state,
broken_promise
};
_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_errc)
template <>
struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<future_errc> : public true_type {};
#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
template <>
struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<future_errc::__lx> : public true_type { };
#endif
//enum class launch
_LIBCPP_DECLARE_STRONG_ENUM(launch)
{
async = 1,
deferred = 2,
any = async | deferred
};
_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch)
#ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
typedef underlying_type<launch>::type __launch_underlying_type;
inline _LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
launch
operator&(launch __x, launch __y)
{
return static_cast<launch>(static_cast<__launch_underlying_type>(__x) &
static_cast<__launch_underlying_type>(__y));
}
inline _LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
launch
operator|(launch __x, launch __y)
{
return static_cast<launch>(static_cast<__launch_underlying_type>(__x) |
static_cast<__launch_underlying_type>(__y));
}
inline _LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
launch
operator^(launch __x, launch __y)
{
return static_cast<launch>(static_cast<__launch_underlying_type>(__x) ^
static_cast<__launch_underlying_type>(__y));
}
inline _LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
launch
operator~(launch __x)
{
return static_cast<launch>(~static_cast<__launch_underlying_type>(__x) & 3);
}
inline _LIBCPP_INLINE_VISIBILITY
launch&
operator&=(launch& __x, launch __y)
{
__x = __x & __y; return __x;
}
inline _LIBCPP_INLINE_VISIBILITY
launch&
operator|=(launch& __x, launch __y)
{
__x = __x | __y; return __x;
}
inline _LIBCPP_INLINE_VISIBILITY
launch&
operator^=(launch& __x, launch __y)
{
__x = __x ^ __y; return __x;
}
#endif // !_LIBCPP_HAS_NO_STRONG_ENUMS
//enum class future_status
_LIBCPP_DECLARE_STRONG_ENUM(future_status)
{
ready,
timeout,
deferred
};
_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_status)
_LIBCPP_FUNC_VIS
const error_category& future_category() _NOEXCEPT;
inline _LIBCPP_INLINE_VISIBILITY
error_code
make_error_code(future_errc __e) _NOEXCEPT
{
return error_code(static_cast<int>(__e), future_category());
}
inline _LIBCPP_INLINE_VISIBILITY
error_condition
make_error_condition(future_errc __e) _NOEXCEPT
{
return error_condition(static_cast<int>(__e), future_category());
}
class _LIBCPP_EXCEPTION_ABI _LIBCPP_AVAILABILITY_FUTURE_ERROR future_error
: public logic_error
{
error_code __ec_;
public:
future_error(error_code __ec);
#if _LIBCPP_STD_VERS > 14
explicit future_error(future_errc _Ev) : logic_error(), __ec_(make_error_code(_Ev)) {}
#endif
_LIBCPP_INLINE_VISIBILITY
const error_code& code() const _NOEXCEPT {return __ec_;}
virtual ~future_error() _NOEXCEPT;
};
_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
#ifndef _LIBCPP_NO_EXCEPTIONS
_LIBCPP_AVAILABILITY_FUTURE_ERROR
#endif
void __throw_future_error(future_errc _Ev)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw future_error(make_error_code(_Ev));
#else
((void)_Ev);
_VSTD::abort();
#endif
}
class _LIBCPP_TYPE_VIS _LIBCPP_AVAILABILITY_FUTURE __assoc_sub_state
: public __shared_count
{
protected:
exception_ptr __exception_;
mutable mutex __mut_;
mutable condition_variable __cv_;
unsigned __state_;
virtual void __on_zero_shared() _NOEXCEPT;
void __sub_wait(unique_lock<mutex>& __lk);
public:
enum
{
__constructed = 1,
__future_attached = 2,
ready = 4,
deferred = 8
};
_LIBCPP_INLINE_VISIBILITY
__assoc_sub_state() : __state_(0) {}
_LIBCPP_INLINE_VISIBILITY
bool __has_value() const
{return (__state_ & __constructed) || (__exception_ != nullptr);}
_LIBCPP_INLINE_VISIBILITY
void __attach_future() {
lock_guard<mutex> __lk(__mut_);
bool __has_future_attached = (__state_ & __future_attached) != 0;
if (__has_future_attached)
__throw_future_error(future_errc::future_already_retrieved);
this->__add_shared();
__state_ |= __future_attached;
}
_LIBCPP_INLINE_VISIBILITY
void __set_deferred() {__state_ |= deferred;}
void __make_ready();
_LIBCPP_INLINE_VISIBILITY
bool __is_ready() const {return (__state_ & ready) != 0;}
void set_value();
void set_value_at_thread_exit();
void set_exception(exception_ptr __p);
void set_exception_at_thread_exit(exception_ptr __p);
void copy();
void wait();
template <class _Rep, class _Period>
future_status
_LIBCPP_INLINE_VISIBILITY
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const;
template <class _Clock, class _Duration>
_LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
future_status
wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const;
virtual void __execute();
};
template <class _Clock, class _Duration>
future_status
__assoc_sub_state::wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const
{
unique_lock<mutex> __lk(__mut_);
if (__state_ & deferred)
return future_status::deferred;
while (!(__state_ & ready) && _Clock::now() < __abs_time)
__cv_.wait_until(__lk, __abs_time);
if (__state_ & ready)
return future_status::ready;
return future_status::timeout;
}
template <class _Rep, class _Period>
inline
future_status
__assoc_sub_state::wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
{
return wait_until(chrono::steady_clock::now() + __rel_time);
}
template <class _Rp>
class _LIBCPP_AVAILABILITY_FUTURE __assoc_state
: public __assoc_sub_state
{
typedef __assoc_sub_state base;
typedef typename aligned_storage<sizeof(_Rp), alignment_of<_Rp>::value>::type _Up;
protected:
_Up __value_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
template <class _Arg>
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
void set_value(_Arg&& __arg);
#else
void set_value(_Arg& __arg);
#endif
template <class _Arg>
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
void set_value_at_thread_exit(_Arg&& __arg);
#else
void set_value_at_thread_exit(_Arg& __arg);
#endif
_Rp move();
typename add_lvalue_reference<_Rp>::type copy();
};
template <class _Rp>
void
__assoc_state<_Rp>::__on_zero_shared() _NOEXCEPT
{
if (this->__state_ & base::__constructed)
reinterpret_cast<_Rp*>(&__value_)->~_Rp();
delete this;
}
template <class _Rp>
template <class _Arg>
_LIBCPP_AVAILABILITY_FUTURE
void
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
__assoc_state<_Rp>::set_value(_Arg&& __arg)
#else
__assoc_state<_Rp>::set_value(_Arg& __arg)
#endif
{
unique_lock<mutex> __lk(this->__mut_);
if (this->__has_value())
__throw_future_error(future_errc::promise_already_satisfied);
::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
this->__state_ |= base::__constructed | base::ready;
__cv_.notify_all();
}
template <class _Rp>
template <class _Arg>
void
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
__assoc_state<_Rp>::set_value_at_thread_exit(_Arg&& __arg)
#else
__assoc_state<_Rp>::set_value_at_thread_exit(_Arg& __arg)
#endif
{
unique_lock<mutex> __lk(this->__mut_);
if (this->__has_value())
__throw_future_error(future_errc::promise_already_satisfied);
::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
this->__state_ |= base::__constructed;
__thread_local_data()->__make_ready_at_thread_exit(this);
}
template <class _Rp>
_Rp
__assoc_state<_Rp>::move()
{
unique_lock<mutex> __lk(this->__mut_);
this->__sub_wait(__lk);
if (this->__exception_ != nullptr)
rethrow_exception(this->__exception_);
return _VSTD::move(*reinterpret_cast<_Rp*>(&__value_));
}
template <class _Rp>
typename add_lvalue_reference<_Rp>::type
__assoc_state<_Rp>::copy()
{
unique_lock<mutex> __lk(this->__mut_);
this->__sub_wait(__lk);
if (this->__exception_ != nullptr)
rethrow_exception(this->__exception_);
return *reinterpret_cast<_Rp*>(&__value_);
}
template <class _Rp>
class _LIBCPP_AVAILABILITY_FUTURE __assoc_state<_Rp&>
: public __assoc_sub_state
{
typedef __assoc_sub_state base;
typedef _Rp* _Up;
protected:
_Up __value_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
void set_value(_Rp& __arg);
void set_value_at_thread_exit(_Rp& __arg);
_Rp& copy();
};
template <class _Rp>
void
__assoc_state<_Rp&>::__on_zero_shared() _NOEXCEPT
{
delete this;
}
template <class _Rp>
void
__assoc_state<_Rp&>::set_value(_Rp& __arg)
{
unique_lock<mutex> __lk(this->__mut_);
if (this->__has_value())
__throw_future_error(future_errc::promise_already_satisfied);
__value_ = _VSTD::addressof(__arg);
this->__state_ |= base::__constructed | base::ready;
__cv_.notify_all();
}
template <class _Rp>
void
__assoc_state<_Rp&>::set_value_at_thread_exit(_Rp& __arg)
{
unique_lock<mutex> __lk(this->__mut_);
if (this->__has_value())
__throw_future_error(future_errc::promise_already_satisfied);
__value_ = _VSTD::addressof(__arg);
this->__state_ |= base::__constructed;
__thread_local_data()->__make_ready_at_thread_exit(this);
}
template <class _Rp>
_Rp&
__assoc_state<_Rp&>::copy()
{
unique_lock<mutex> __lk(this->__mut_);
this->__sub_wait(__lk);
if (this->__exception_ != nullptr)
rethrow_exception(this->__exception_);
return *__value_;
}
template <class _Rp, class _Alloc>
class _LIBCPP_AVAILABILITY_FUTURE __assoc_state_alloc
: public __assoc_state<_Rp>
{
typedef __assoc_state<_Rp> base;
_Alloc __alloc_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
_LIBCPP_INLINE_VISIBILITY
explicit __assoc_state_alloc(const _Alloc& __a)
: __alloc_(__a) {}
};
template <class _Rp, class _Alloc>
void
__assoc_state_alloc<_Rp, _Alloc>::__on_zero_shared() _NOEXCEPT
{
if (this->__state_ & base::__constructed)
reinterpret_cast<_Rp*>(_VSTD::addressof(this->__value_))->~_Rp();
typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al;
typedef allocator_traits<_Al> _ATraits;
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
_Al __a(__alloc_);
this->~__assoc_state_alloc();
__a.deallocate(_PTraits::pointer_to(*this), 1);
}
template <class _Rp, class _Alloc>
class _LIBCPP_AVAILABILITY_FUTURE __assoc_state_alloc<_Rp&, _Alloc>
: public __assoc_state<_Rp&>
{
typedef __assoc_state<_Rp&> base;
_Alloc __alloc_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
_LIBCPP_INLINE_VISIBILITY
explicit __assoc_state_alloc(const _Alloc& __a)
: __alloc_(__a) {}
};
template <class _Rp, class _Alloc>
void
__assoc_state_alloc<_Rp&, _Alloc>::__on_zero_shared() _NOEXCEPT
{
typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al;
typedef allocator_traits<_Al> _ATraits;
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
_Al __a(__alloc_);
this->~__assoc_state_alloc();
__a.deallocate(_PTraits::pointer_to(*this), 1);
}
template <class _Alloc>
class _LIBCPP_AVAILABILITY_FUTURE __assoc_sub_state_alloc
: public __assoc_sub_state
{
typedef __assoc_sub_state base;
_Alloc __alloc_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
_LIBCPP_INLINE_VISIBILITY
explicit __assoc_sub_state_alloc(const _Alloc& __a)
: __alloc_(__a) {}
};
template <class _Alloc>
void
__assoc_sub_state_alloc<_Alloc>::__on_zero_shared() _NOEXCEPT
{
typedef typename __allocator_traits_rebind<_Alloc, __assoc_sub_state_alloc>::type _Al;
typedef allocator_traits<_Al> _ATraits;
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
_Al __a(__alloc_);
this->~__assoc_sub_state_alloc();
__a.deallocate(_PTraits::pointer_to(*this), 1);
}
template <class _Rp, class _Fp>
class _LIBCPP_AVAILABILITY_FUTURE __deferred_assoc_state
: public __assoc_state<_Rp>
{
typedef __assoc_state<_Rp> base;
_Fp __func_;
public:
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
explicit __deferred_assoc_state(_Fp&& __f);
#endif
virtual void __execute();
};
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Rp, class _Fp>
inline
__deferred_assoc_state<_Rp, _Fp>::__deferred_assoc_state(_Fp&& __f)
: __func_(_VSTD::forward<_Fp>(__f))
{
this->__set_deferred();
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Rp, class _Fp>
void
__deferred_assoc_state<_Rp, _Fp>::__execute()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
this->set_value(__func_());
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
this->set_exception(current_exception());
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
template <class _Fp>
class _LIBCPP_AVAILABILITY_FUTURE __deferred_assoc_state<void, _Fp>
: public __assoc_sub_state
{
typedef __assoc_sub_state base;
_Fp __func_;
public:
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
explicit __deferred_assoc_state(_Fp&& __f);
#endif
virtual void __execute();
};
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Fp>
inline
__deferred_assoc_state<void, _Fp>::__deferred_assoc_state(_Fp&& __f)
: __func_(_VSTD::forward<_Fp>(__f))
{
this->__set_deferred();
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Fp>
void
__deferred_assoc_state<void, _Fp>::__execute()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
__func_();
this->set_value();
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
this->set_exception(current_exception());
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
template <class _Rp, class _Fp>
class _LIBCPP_AVAILABILITY_FUTURE __async_assoc_state
: public __assoc_state<_Rp>
{
typedef __assoc_state<_Rp> base;
_Fp __func_;
virtual void __on_zero_shared() _NOEXCEPT;
public:
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
explicit __async_assoc_state(_Fp&& __f);
#endif
virtual void __execute();
};
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Rp, class _Fp>
inline
__async_assoc_state<_Rp, _Fp>::__async_assoc_state(_Fp&& __f)
: __func_(_VSTD::forward<_Fp>(__f))
{
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Rp, class _Fp>
void
__async_assoc_state<_Rp, _Fp>::__execute()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
this->set_value(__func_());
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
this->set_exception(current_exception());
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
template <class _Rp, class _Fp>
void
__async_assoc_state<_Rp, _Fp>::__on_zero_shared() _NOEXCEPT
{
this->wait();
base::__on_zero_shared();
}
template <class _Fp>
class _LIBCPP_AVAILABILITY_FUTURE __async_assoc_state<void, _Fp>