-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path_garcoll.h
1561 lines (1348 loc) · 39.6 KB
/
_garcoll.h
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
#ifndef __GARCOLL_H
#define __GARCOLL_H
// Copyright David Lawrence Bien 1997 - 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt).
// _garcoll.h
// This module implements templates necessary for garbage collection.
__BIENUTIL_BEGIN_NAMESPACE
#if IS_MULTITHREADED_BUILD
#include <atomic>
typedef atomic< int_fast32_t > vytGcoRef; // signed to test for underflow.
#else // !IS_MULTITHREADED_BUILD
typedef int_fast32_t vytGcoRef;
#endif // !IS_MULTITHREADED_BUILD
// utility template for dispatch of comparison:
template < class t_TyCompare, class t_TyEl, bool t_fUseElCompare >
struct _gco_dispatch_compare
{
static inline bool equals( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return static_cast< t_TyEl const & >( _rl ) == static_cast< t_TyEl const & >( _rr );
}
static inline bool notequals( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return static_cast< t_TyEl const & >( _rl ) != static_cast< t_TyEl const & >( _rr );
}
static inline bool less( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return static_cast< t_TyEl const & >( _rl ) < static_cast< t_TyEl const & >( _rr );
}
static inline bool greater( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return static_cast< t_TyEl const & >( _rr ) < static_cast< t_TyEl const & >( _rl );
}
};
template < class t_TyCompare, class t_TyEl >
struct _gco_dispatch_compare< t_TyCompare, t_TyEl, false >
{
static inline bool equals( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return &_rl == &_rr;
}
static inline bool notequals( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return &_rl != &_rr;
}
static inline bool less( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return &_rl < &_rr;
}
static inline bool greater( t_TyCompare const & _rl, t_TyCompare const & _rr )
{
return &_rr < &_rl;
}
};
// Non-polymorphic object support:
// _gco
// _gco with element as member.
template < class t_TyEl,
class t_TyAllocator = allocator< char >,
bool t_fUseElCompare = false,
bool t_fElIsInEmbeddedStore = false >
class _gco
{
typedef _gco _TyThis;
typedef typename allocator_traits< t_TyAllocator >::template rebind_alloc< _TyThis > _TyAllocatorThis;
// Needed for external access:
typedef t_TyAllocator _TyAllocator;
typedef t_TyEl _TyEl;
// Only allow _gcr, _gcp, and _gco_dispatch_compare access to this class:
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
template < class t__TyThis,
class t__TyEl,
bool t__fUseElCompare >
friend struct _gco_dispatch_compare;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcr_dispatch_el_access;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
t_TyEl m_tEl;
[[no_unique_address]] _TyAllocatorThis m_alloc; // Allow instanceless allocator to use no memory.
vytGcoRef m_ref; // Put this at the end in case out allocator is not empty and has space at the end to store m_ref.
explicit _gco( t_TyAllocator const & _rAlloc )
: m_alloc( _rAlloc ),
m_ref( 1 )
{
}
explicit _gco( _TyThis const & _r )
: m_alloc( _r.m_alloc ),
m_ref( 1 ),
m_tEl( _r.m_tEl )
{
}
// Emplacement constructor:
template < class ... t_TysArgs >
_gco( t_TysArgs && ... _args )
: m_tEl( std::forward< t_TysArgs >( _args ) ... ),
m_ref( 1 )
{
}
// Emplacement constructor:
template < class ... t_TysArgs >
_gco( t_TyAllocator const & _rAlloc, t_TysArgs && ... _args )
: m_alloc( _rAlloc ),
m_tEl( std::forward< t_TysArgs >( _args ) ... ),
m_ref( 1 )
{
}
#if 0 // old-school C++
// Utility templatized constructors, unfortunately, these
// do not allow the passing of reference parameters:
template < class t_Ty1 >
_gco( t_Ty1 _r1, t_TyAllocator const & _rAlloc )
: m_alloc( _rAlloc ),
m_ref( 1 ),
m_tEl( _r1 )
{
}
template < class t_Ty1, class t_Ty2 >
_gco( t_Ty1 _r1, t_Ty2 _r2, t_TyAllocator const & _rAlloc )
: m_alloc( _rAlloc ),
m_ref( 1 ),
m_tEl( _r1, _r2 )
{
}
#endif
~_gco()
{
Assert( !m_ref ); // This should be the case.
}
// access:
operator t_TyEl const & () const
{
return m_tEl;
}
operator t_TyEl & ()
{
return m_tEl;
}
// reference counting:
vytGcoRef AddRef() _BIEN_NOTHROW
{
return ++m_ref;
}
vytGcoRef Release() _BIEN_NOTHROW
{
return --m_ref;
}
bool operator == ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::equals( *this, _r );
}
bool operator != ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::notequals( *this, _r );
}
bool operator < ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::less( *this, _r );
}
bool operator > ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::greater( *this, _r );
}
_TyThis * copy() const
{
_TyThis * p = m_alloc.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( *this );
}
_BIEN_UNWIND( m_alloc.deallocate( p, 1 ) );
return p;
}
// static creation utilities:
static _TyThis * PGCOCreate( t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
template < class t_Ty1 >
static _TyThis * PGCOCreate1( t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _r1, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
template < class t_Ty1, class t_Ty2 >
static _TyThis * PGCOCreate2( t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _r1, _r2, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
void destroy( )
{
_TyAllocatorThis localAllocator( std::move( m_alloc ) ); // since we are deallocating this.
this->~_TyThis();
localAllocator.deallocate( this, 1 );
}
};
// _gco where element is contained in member buffer -
// this enables construction of contained element with exact params
// ( no template argument dedection occurs when ctor is called ):
template < class t_TyEl,
class t_TyAllocator,
bool t_fUseElCompare >
class _gco< t_TyEl, t_TyAllocator, t_fUseElCompare, true >
{
typedef _gco _TyThis;
typedef typename allocator_traits< t_TyAllocator >::template rebind_alloc< _TyThis > _TyAllocatorThis;
// Needed for external access:
typedef t_TyAllocator _TyAllocator;
typedef t_TyEl _TyEl;
// Only allow _gcr, _gcp, and _gco_dispatch_compare access to this class:
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
template < class t__TyThis,
class t__TyEl,
bool t__fUseElCompare >
friend struct _gco_dispatch_compare;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcr_dispatch_el_access;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
vytGcoRef m_ref;
[[no_unique_address]] _TyAllocatorThis m_alloc;
// REVIEW:<dbien>: Better to do this with an anonymous union - ie. as std::optional<> is done since then the alignment of the structure would be correct.
char m_cpEl[ sizeof( _TyEl ) ];
explicit _gco( t_TyAllocator const & _rAlloc )
: m_alloc( _rAlloc ),
m_ref( 1 )
{
}
explicit _gco( _TyThis const & _r )
: m_alloc( _r.m_alloc ),
m_ref( 1 )
{
// Call copy constructor explicitly:
new ( m_cpEl ) _TyEl( static_cast< _TyEl const & >( _r ) );
}
#ifndef NDEBUG
~_gco()
{
Assert( !m_ref ); // This should be the case.
}
#endif //!NDEBUG
// access:
operator t_TyEl const & () const
{
return *reinterpret_cast< t_TyEl const * >( m_cpEl );
}
operator t_TyEl & ()
{
return *reinterpret_cast< t_TyEl * >( m_cpEl );
}
// reference counting:
vytGcoRef AddRef() _BIEN_NOTHROW
{
return ++m_ref;
}
vytGcoRef Release() _BIEN_NOTHROW
{
return --m_ref;
}
bool operator == ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::equals( *this, _r );
}
bool operator != ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::notequals( *this, _r );
}
bool operator < ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::less( *this, _r );
}
bool operator > ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, t_TyEl, t_fUseElCompare >::greater( *this, _r );
}
_TyThis * copy() const
{
_TyThis * p = m_alloc.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( *this );
}
_BIEN_UNWIND( m_alloc.deallocate( p, 1 ) );
return p;
}
// static creation utilities:
static _TyThis * PGCOCreate( t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _rAlloc );
new ( &static_cast< _TyEl & >( *p ) ) _TyEl();
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
template < class t_Ty1 >
static _TyThis * PGCOCreate1( t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _rAlloc );
new ( &static_cast< _TyEl & >( *p ) ) _TyEl( _r1 );
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
template < class t_Ty1, class t_Ty2 >
static _TyThis * PGCOCreate2( t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * p = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( p ) _TyThis( _rAlloc );
new ( &static_cast< _TyEl & >( *p ) ) _TyEl( _r1, _r2 );
}
_BIEN_UNWIND( localAllocator.deallocate( p, 1 ) );
return p;
}
void destroy( )
{
_TyAllocatorThis localAllocator( std::move( m_alloc ) ); // since we are deallocating this.
static_cast< _TyEl & >( *this ).~_TyEl(); // destruct contained object.
this->~_TyThis();
localAllocator.deallocate( this, 1 );
}
};
// Polymorphic object support:
template < class t_TyBase, bool t_fUseElCompare = false >
class _gcop_base
{
typedef _gcop_base< t_TyBase, t_fUseElCompare > _TyThis;
_gcop_base( _TyThis const & ); // don't define this.
protected:
typedef t_TyBase _TyEl;
// We need to define a default allocator type:
typedef allocator< char > _TyAllocator;
// Only _gcp and _gcr have access to members of this class.
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t_TyGCODerived,
class t_TyGcrBase >
friend class _gcr_create;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
template < class t__TyThis,
class t__TyEl,
bool t__fUseElCompare >
friend struct _gco_dispatch_compare;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcr_dispatch_el_access;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
vytGcoRef m_ref;
// To avoid virtuals in this object we store the following:
typedef void ( _TyThis:: * _TyPMFnDestroy )();
_TyPMFnDestroy m_pmfnDestroy;
t_TyBase * m_pBase; // Modifiable reference to derived's contained object.
_gcop_base( t_TyBase * _pBase,
_TyPMFnDestroy _pmfnDestroy )
: m_ref( 1 ),
m_pBase( _pBase ),
m_pmfnDestroy( _pmfnDestroy )
{ }
void destroy()
{
// Delegate to derived container - it knows about the derived object:
(this->*m_pmfnDestroy)();
}
vytGcoRef AddRef() _BIEN_NOTHROW
{
return ++m_ref;
}
vytGcoRef Release() _BIEN_NOTHROW
{
return --m_ref;
}
// Since semantically we have the object stored with us,
// we assume that const-ness is same.
operator const t_TyBase & () const
{
return const_cast< const t_TyBase & >( *m_pBase );
}
operator t_TyBase & ()
{
return *m_pBase;
}
bool operator == ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::equals( *this, _r );
}
bool operator != ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::notequals( *this, _r );
}
bool operator < ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::less( *this, _r );
}
bool operator > ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::greater( *this, _r );
}
};
// An instance of a derived garbage collected polymorphic object.
// Instanced allocator:
template < class t_TyDerived, class t_TyBase, class t_TyAllocator = allocator< char >,
class t_TyBaseClass = _gcop_base< t_TyBase > >
class _gcop_derived : public t_TyBaseClass
{
typedef _gcop_derived _TyThis;
typedef t_TyBaseClass _TyBase;
typedef typename allocator_traits< t_TyAllocator >::template rebind_alloc< _TyThis > _TyAllocatorThis;
typedef t_TyAllocator _TyAllocator;
typedef t_TyDerived _TyDerived;
typedef typename _TyBase::_TyPMFnDestroy _TyPMFnDestroy;
// Only _gcp and _gcr have access to members of this class.
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t_TyGCODerived,
class t_TyGcrBase >
friend class _gcr_create;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcr_dispatch_el_access;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
public:
// Public static creation utilities - this is how a _gcop_derived object is created:
template < class t_TyGcp >
static void CreateGct( t_TyGcp & _rgcp, t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::Create( _rgcp, _rAlloc );
}
template < class t_TyGcp, class t_Ty1 >
static void CreateGct1( t_TyGcp & _rgcp, t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::template Create1< t_Ty1 >( _rgcp, _r1, _rAlloc );
}
template < class t_TyGcp, class t_Ty1, class t_Ty2 >
static void CreateGct2( t_TyGcp & _rgcp, t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::template Create2< t_Ty1, t_Ty2 >( _rgcp, _r1, _r2, _rAlloc );
}
private:
t_TyDerived m_tEl; // The derived element.
[[no_unique_address]] _TyAllocatorThis m_alloc;
explicit _gcop_derived( _TyThis const & _r )
: _TyBase( (t_TyBase*)&m_tEl, static_cast< _TyPMFnDestroy >( &_TyThis::destroy ) ),
m_alloc( _r.m_alloc ),
m_tEl( _r.m_tEl )
{
}
explicit _gcop_derived( t_TyAllocator const & _rAlloc )
: _TyBase( (t_TyBase*)&m_tEl, static_cast< _TyPMFnDestroy >( &_TyThis::destroy ) ),
m_alloc( _rAlloc )
{
}
template < class t_Ty1 >
explicit _gcop_derived( t_Ty1 _r1, t_TyAllocator const & _rAlloc )
: _TyBase( (t_TyBase*)&m_tEl, static_cast< _TyPMFnDestroy >( &_TyThis::destroy ) ),
m_alloc( _rAlloc ),
m_tEl( _r1 )
{
}
template < class t_Ty1, class t_Ty2 >
explicit _gcop_derived( t_Ty1 _r1, t_Ty2 _r2, t_TyAllocator const & _rAlloc )
: _TyBase( (t_TyBase*)&m_tEl, static_cast< _TyPMFnDestroy >( &_TyThis::destroy ) ),
m_alloc( _rAlloc ),
m_tEl( _r1, _r2 )
{
}
_TyThis * copy() const
{
_TyThis * pgco = m_alloc.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( *this );
}
_BIEN_UNWIND( m_alloc.deallocate( pgco, 1 ) );
return pgco;
}
static _TyThis * PGCOCreate( t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
template < class t_Ty1 >
static _TyThis * PGCOCreate1( t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _r1, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
template < class t_Ty1, class t_Ty2 >
static _TyThis * PGCOCreate2( t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _r1, _r2, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
void destroy()
{
_TyAllocatorThis local( m_alloc );
this->~_TyThis();
local.deallocate( this, 1 );
}
};
// Base with virtuals:
template < class t_TyBase, bool t_fUseElCompare = false >
class _gcop_basev
{
typedef _gcop_basev< t_TyBase, t_fUseElCompare > _TyThis;
_gcop_basev( _TyThis const & ); // don't define this.
protected:
typedef t_TyBase _TyEl;
// We need to define a default allocator type:
typedef allocator< char > _TyAllocator;
// Only _gcp and _gcr have access to members of this class.
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t_TyGCODerived,
class t_TyGcrBase >
friend class _gcr_create;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
template < class t__TyThis,
class t__TyEl,
bool t__fUseElCompare >
friend struct _gco_dispatch_compare;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcr_dispatch_el_access;
template < class t_TyGcr, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
vytGcoRef m_ref;
t_TyBase * m_pBase; // Modifiable reference to derived's contained object.
_gcop_basev( t_TyBase * _pBase )
: m_ref( 1 ),
m_pBase( _pBase )
{ }
#ifndef NDEBUG
~_gcop_basev()
{
Assert( !m_ref ); // this should be the case.
}
#endif //!NDEBUG
virtual _TyThis * copy() const = 0;
virtual void destroy() = 0;
vytGcoRef AddRef() _BIEN_NOTHROW
{
return ++m_ref;
}
vytGcoRef Release() _BIEN_NOTHROW
{
return --m_ref;
}
// Since semantically we have the object stored with us,
// we assume that const-ness is same.
operator const t_TyBase & () const
{
return const_cast< const t_TyBase & >( *m_pBase );
}
operator t_TyBase & ()
{
return *m_pBase;
}
bool operator == ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::equals( *this, _r );
}
bool operator != ( _TyThis const & _r ) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::notequals( *this, _r );
}
bool operator < ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::less( *this, _r );
}
bool operator > ( _TyThis const & _r) const
{
return _gco_dispatch_compare< _TyThis, _TyEl, t_fUseElCompare >::greater( *this, _r );
}
};
// An instance of a derived garbage collected polymorphic object.
// Instanced allocator:
template < class t_TyDerived, class t_TyBase, class t_TyAllocator = allocator< char >,
class t_TyBaseClass = _gcop_basev< t_TyBase > >
class _gcop_derivedv : public t_TyBaseClass
{
typedef _gcop_derivedv _TyThis;
typedef t_TyBaseClass _TyBase;
typedef typename allocator_traits< t_TyAllocator >::template rebind_alloc< _TyThis > _TyAllocatorThis;
typedef t_TyAllocator _TyAllocator;
typedef t_TyDerived _TyDerived;
// Only _gcp and _gcr have access to members of this class.
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t_TyGCODerived,
class t_TyGcrBase >
friend class _gcr_create;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcp;
public:
// Public static creation utilities - this is how a _gcop_derivedv object is created:
template < class t_TyGcp >
static void CreateGct( t_TyGcp & _rgcp, t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::Create( _rgcp, _rAlloc );
}
template < class t_TyGcp, class t_Ty1 >
static void CreateGct1( t_TyGcp & _rgcp, t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::template Create1< t_Ty1 >( _rgcp, _r1, _rAlloc );
}
template < class t_TyGcp, class t_Ty1, class t_Ty2 >
static void CreateGct2( t_TyGcp & _rgcp, t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
t_TyGcp::template create< _TyThis >::template Create2< t_Ty1, t_Ty2 >( _rgcp, _r1, _r2, _rAlloc );
}
private:
[[no_unique_address]] _TyAllocatorThis m_alloc;
t_TyDerived m_tEl; // The derived element.
explicit _gcop_derivedv( _TyThis const & _r )
: _TyBase( static_cast< t_TyBase* >( &m_tEl ) ),
m_alloc( _r.m_alloc ),
m_tEl( _r.m_tEl )
{
}
explicit _gcop_derivedv( t_TyAllocator const & _rAlloc )
: _TyBase( static_cast< t_TyBase* >( &m_tEl ) ),
m_alloc( _rAlloc )
{
}
template < class t_Ty1 >
explicit _gcop_derivedv( t_Ty1 _r1, t_TyAllocator const & _rAlloc )
: _TyBase( static_cast< t_TyBase* >( &m_tEl ) ),
m_alloc( _rAlloc ),
m_tEl( _r1 )
{
}
template < class t_Ty1, class t_Ty2 >
explicit _gcop_derivedv( t_Ty1 _r1, t_Ty2 _r2, t_TyAllocator const & _rAlloc )
: _TyBase( static_cast< t_TyBase* >( &m_tEl ) ),
m_alloc( _rAlloc ),
m_tEl( _r1, _r2 )
{
}
// Bug in Intel compiler prevents returning covariant type:
_TyBase * copy() const
{
_TyThis * pgco = m_alloc.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( *this );
}
_BIEN_UNWIND( m_alloc.deallocate( pgco, 1 ) );
return pgco;
}
static _TyThis * PGCOCreate( t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
template < class t_Ty1 >
static _TyThis * PGCOCreate1( t_Ty1 _r1,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _r1, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
template < class t_Ty1, class t_Ty2 >
static _TyThis * PGCOCreate2( t_Ty1 _r1, t_Ty2 _r2,
t_TyAllocator const & _rAlloc = t_TyAllocator() )
{
_TyAllocatorThis localAllocator( _rAlloc );
_TyThis * pgco = localAllocator.allocate( 1 );
_BIEN_TRY
{
new ( pgco ) _TyThis( _r1, _r2, _rAlloc );
}
_BIEN_UNWIND( localAllocator.deallocate( pgco, 1 ) );
return pgco;
}
void destroy()
{
_TyAllocatorThis local( m_alloc );
this->~_TyThis();
local.deallocate( this, 1 );
}
};
template < class t__TyEl,
class t__TyGCO = _gco< t__TyEl >,
bool t__fCopyOnWrite = false >
class _gcr;
template < class t_TyGcp, bool t__fCopyOnWrite >
struct _gcp_dispatch_el_access
{
static inline typename t_TyGcp::_TyEl * PElNonConst( t_TyGcp & _r )
{
return _r._CopyOnWrite();
}
};
template < class t_TyGcp >
struct _gcp_dispatch_el_access< t_TyGcp, false >
{
static inline typename t_TyGcp::_TyEl * PElNonConst( t_TyGcp & _r )
{
return _r.m_pgco ? &static_cast< typename t_TyGcp::_TyEl & >( *_r.m_pgco ) : 0;
}
};
// Pointer to reference container.
template < class t_TyEl,
class t_TyGCO = _gco< t_TyEl >,
bool t_fCopyOnWrite = false >
class _gcp
{
typedef _gcp _TyThis;
typedef typename t_TyGCO::_TyAllocator _TyAllocator;
template < class t__TyEl,
class t__TyGCO,
bool t__fCopyOnWrite >
friend class _gcr;
template < class t_TyGcp, bool t__fCopyOnWrite >
friend struct _gcp_dispatch_el_access;
protected:
t_TyGCO * m_pgco; // Pointer to garbage collected object.
explicit _gcp( t_TyGCO & _rgco )
: m_pgco( &_rgco )
{
m_pgco->AddRef();
}
explicit _gcp( t_TyGCO * _pgco )
: m_pgco( _pgco )
{
if ( m_pgco )
{
m_pgco->AddRef();
}
}
public:
typedef t_TyEl _TyEl;
typedef t_TyGCO _TyGCO;
typedef _gcr< t_TyEl, t_TyGCO, t_fCopyOnWrite > _TyGcr;
// ctor, dtor:
_gcp()
: m_pgco( 0 )
{
}
explicit _gcp( _TyThis const & _rgcp )
: m_pgco( _rgcp.m_pgco )
{
if ( m_pgco )
{
m_pgco->AddRef();
}
}
// Create from a reference to a contained element:
explicit _gcp( t_TyEl const & _rEl, _TyAllocator const & _rA = _TyAllocator() )
: m_pgco( t_TyGCO::template PGCOCreate1< t_TyEl const & >( _rEl, _rA ) )
{
}
// Create from a reference gco holder of same type:
// Allow implicit conversion from a gcr.
_gcp( _TyGcr const & _rgcr )
: m_pgco( _rgcr.PGCO() )
{
if ( m_pgco )
{