-
Notifications
You must be signed in to change notification settings - Fork 138
/
oo.c
1453 lines (1104 loc) · 42.6 KB
/
oo.c
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
/*
Copyright (C) 2007-2011, Parrot Foundation.
=head1 NAME
oo.c - Class and object
=head1 DESCRIPTION
Handles class and object manipulation.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/oo_private.h"
#include "pmc/pmc_class.h"
#include "pmc/pmc_object.h"
#include "pmc/pmc_namespace.h"
#include "oo.str"
/* HEADERIZER HFILE: include/parrot/oo.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC* C3_merge(PARROT_INTERP, ARGIN(PMC *merge_list))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void debug_trace_find_meth(PARROT_INTERP,
ARGIN(const PMC *_class),
ARGIN(const STRING *name),
ARGIN_NULLOK(const PMC *sub))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static INTVAL fail_if_type_exists(PARROT_INTERP, ARGIN(PMC *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_INLINE
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static PMC * get_pmc_proxy(PARROT_INTERP, INTVAL type)
__attribute__nonnull__(1);
static void invalidate_all_caches(PARROT_INTERP)
__attribute__nonnull__(1);
static void invalidate_type_caches(PARROT_INTERP, UINTVAL type)
__attribute__nonnull__(1);
#define ASSERT_ARGS_C3_merge __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(merge_list))
#define ASSERT_ARGS_debug_trace_find_meth __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(_class) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_fail_if_type_exists __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_get_pmc_proxy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_invalidate_all_caches __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_invalidate_type_caches __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<static void debug_trace_find_meth(PARROT_INTERP, const PMC *_class,
const STRING *name, const PMC *sub)>
Print some information about the search for a sub.
=cut
*/
#ifdef NDEBUG
# define TRACE_FM(i, c, m, sub)
#else
# define TRACE_FM(i, c, m, sub) \
debug_trace_find_meth((i), (c), (m), (sub))
static void
debug_trace_find_meth(PARROT_INTERP, ARGIN(const PMC *_class),
ARGIN(const STRING *name), ARGIN_NULLOK(const PMC *sub))
{
ASSERT_ARGS(debug_trace_find_meth)
STRING *class_name;
const char *result;
Interp *tracer;
if (!Interp_trace_TEST(interp, PARROT_TRACE_FIND_METH_FLAG))
return;
if (PObj_is_class_TEST(_class)) {
SLOTTYPE * const class_array = PMC_data_typed(_class, SLOTTYPE *);
PMC * const class_name_pmc = get_attrib_num(class_array, PCD_CLASS_NAME);
class_name = VTABLE_get_string(interp, class_name_pmc);
}
else
class_name = _class->vtable->whoami;
if (sub) {
if (sub->vtable->base_type == enum_class_NativePCCMethod)
result = "NativePCCMethod";
else if (sub->vtable->base_type == enum_class_NCI)
result = "NCI";
else
result = "Sub";
}
else
result = "no";
tracer = (interp->pdb && interp->pdb->debugger) ?
interp->pdb->debugger :
interp;
Parrot_io_eprintf(tracer, "# find_method class '%Ss' method '%Ss': %s\n",
class_name, name, result);
}
#endif
/*
=item C<void Parrot_oo_extract_methods_from_namespace(PARROT_INTERP, PMC *self,
PMC *ns)>
Extract methods and vtable overrides from the given namespace and insert them
into the class.
=cut
*/
void
Parrot_oo_extract_methods_from_namespace(PARROT_INTERP, ARGIN(PMC *self), ARGIN(PMC *ns))
{
ASSERT_ARGS(Parrot_oo_extract_methods_from_namespace)
Parrot_NameSpace_attributes * nsattrs;
PMC *methods, *vtable_overrides;
/* Pull in methods from the namespace, if any. */
if (PMC_IS_NULL(ns))
return;
nsattrs = PARROT_NAMESPACE(ns);
/* Import any methods. */
/*Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_methods"), "->P", &methods);*/
methods = nsattrs->methods;
nsattrs->methods = PMCNULL;
if (!PMC_IS_NULL(methods)) {
PMC * const iter = VTABLE_get_iter(interp, methods);
while (VTABLE_get_bool(interp, iter)) {
STRING * const meth_name = VTABLE_shift_string(interp, iter);
PMC * const meth_sub = VTABLE_get_pmc_keyed_str(interp, methods,
meth_name);
VTABLE_add_method(interp, self, meth_name, meth_sub);
}
}
/* Import any vtables. */
/*Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_vtable_methods"), "->P", &vtable_overrides);*/
vtable_overrides = nsattrs->vtable;
nsattrs->vtable = PMCNULL;
if (!PMC_IS_NULL(vtable_overrides)) {
PMC * const iter = VTABLE_get_iter(interp, vtable_overrides);
while (VTABLE_get_bool(interp, iter)) {
STRING * const vtable_index_str = VTABLE_shift_string(interp, iter);
PMC * const vtable_sub = VTABLE_get_pmc_keyed_str(interp,
vtable_overrides, vtable_index_str);
/* Look up the name of the vtable function from the index. */
const INTVAL vtable_index = Parrot_str_to_int(interp, vtable_index_str);
const char * const meth_c = Parrot_vtable_slot_names[vtable_index];
STRING * const vtable_name = Parrot_str_new(interp, meth_c, 0);
VTABLE_add_vtable_override(interp, self, vtable_name, vtable_sub);
}
}
}
/*
=item C<PMC * Parrot_oo_get_class(PARROT_INTERP, PMC *key)>
Lookup a class object from a namespace, string, or key PMC.
TODO: This function is terribly inefficient. It needs to be refactored in a
major way
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_get_class(PARROT_INTERP, ARGIN(PMC *key))
{
ASSERT_ARGS(Parrot_oo_get_class)
PMC *classobj = PMCNULL;
if (PMC_IS_NULL(key))
return PMCNULL;
if (PObj_is_class_TEST(key))
classobj = key;
else {
/* Fast select of behavior based on type of the lookup key */
switch (key->vtable->base_type) {
case enum_class_NameSpace:
classobj = VTABLE_get_class(interp, key);
break;
case enum_class_String:
case enum_class_Key:
case enum_class_ResizableStringArray:
{
PMC * const hll_ns = VTABLE_get_pmc_keyed_int(interp,
interp->HLL_namespace,
Parrot_pcc_get_HLL(interp, CURRENT_CONTEXT(interp)));
PMC * const ns = Parrot_ns_get_namespace_keyed(interp,
hll_ns, key);
if (!PMC_IS_NULL(ns))
classobj = VTABLE_get_class(interp, ns);
}
default:
break;
}
}
/* If the PMCProxy doesn't exist yet for the given key, we look up the
type ID here and create a new one */
if (PMC_IS_NULL(classobj)) {
INTVAL type;
const INTVAL base_type = key->vtable->base_type;
/* This is a hack! All PMCs should be able to be handled through
a single codepath, and all of them should be able to avoid
stringification because it's so imprecise. */
if (base_type == enum_class_Key
|| base_type == enum_class_ResizableStringArray
|| base_type == enum_class_String)
type = Parrot_pmc_get_type(interp, key);
else
type = Parrot_pmc_get_type_str(interp, VTABLE_get_string(interp, key));
classobj = get_pmc_proxy(interp, type);
}
return classobj;
}
/*
=item C<PMC * Parrot_oo_clone_object(PARROT_INTERP, PMC *pmc, PMC *dest)>
Clone an Object PMC. If an existing PMC C<dest> is provided, reuse that
PMC to store copies of the data. Otherwise, create a new PMC and populate
that with the data.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_oo_clone_object(PARROT_INTERP, ARGIN(PMC *pmc), ARGMOD_NULLOK(PMC *dest))
{
ASSERT_ARGS(Parrot_oo_clone_object)
Parrot_Object_attributes *obj = PARROT_OBJECT(pmc);
Parrot_Object_attributes *cloned_guts;
Parrot_Class_attributes *_class;
PMC *cloned;
INTVAL num_classes;
INTVAL i, num_attrs;
if (!PMC_IS_NULL(dest)) {
cloned = dest;
}
else {
cloned = Parrot_pmc_new_noinit(interp, enum_class_Object);
}
_class = PARROT_CLASS(obj->_class);
PARROT_ASSERT(_class);
num_classes = VTABLE_elements(interp, _class->all_parents);
/* Set custom GC mark and destroy on the object. */
PObj_custom_mark_SET(cloned);
PObj_custom_destroy_SET(cloned);
/* Flag that it is an object */
PObj_is_object_SET(cloned);
/* Now clone attributes list.class. */
cloned_guts = (Parrot_Object_attributes *) PMC_data(cloned);
cloned_guts->_class = obj->_class;
cloned_guts->attrib_store = VTABLE_clone(interp, obj->attrib_store);
num_attrs = VTABLE_elements(interp, cloned_guts->attrib_store);
for (i = 0; i < num_attrs; ++i) {
PMC * const to_clone = VTABLE_get_pmc_keyed_int(interp, cloned_guts->attrib_store, i);
if (!PMC_IS_NULL(to_clone)) {
VTABLE_set_pmc_keyed_int(interp, cloned_guts->attrib_store, i,
VTABLE_clone(interp, to_clone));
}
}
/* Some of the attributes may have been the PMCs providing storage for any
* PMCs we inherited from; also need to clone those. */
if (CLASS_has_alien_parents_TEST(obj->_class)) {
int j;
/* Locate any PMC parents. */
for (j = 0; j < num_classes; ++j) {
PMC * const cur_class = VTABLE_get_pmc_keyed_int(interp, _class->all_parents, j);
if (cur_class->vtable->base_type == enum_class_PMCProxy) {
/* Clone this PMC too. */
STRING * const proxy = CONST_STRING(interp, "proxy");
VTABLE_set_attr_keyed(interp, cloned, cur_class, proxy,
VTABLE_clone(interp,
VTABLE_get_attr_keyed(interp, cloned, cur_class, proxy)));
}
}
}
/* And we have ourselves a clone. */
return cloned;
}
/*
=item C<static PMC * get_pmc_proxy(PARROT_INTERP, INTVAL type)>
Get the PMC proxy for a PMC with the given type, creating it if does not exist.
If type is not a valid type, return PMCNULL. This code assumes that
all PMCProxy objects live in the 'parrot' HLL namespace -- if/when
we allow PMC types to exist in other HLL namespaces, this code will
need to be updated.
For internal use only.
=cut
*/
PARROT_INLINE
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static PMC *
get_pmc_proxy(PARROT_INTERP, INTVAL type)
{
ASSERT_ARGS(get_pmc_proxy)
PMC * type_class;
/* Check if not a PMC or invalid type number */
if (type > interp->n_vtable_max || type <= 0)
return PMCNULL;
type_class = interp->vtables[type]->pmc_class;
if (type != enum_class_Class
&& type_class->vtable->base_type == enum_class_Class) {
return type_class;
}
else {
PMC * const parrot_hll = Parrot_ns_get_namespace_keyed_str(interp, interp->root_namespace, CONST_STRING(interp, "parrot"));
PMC * const pmc_ns =
Parrot_ns_make_namespace_keyed_str(interp, parrot_hll,
interp->vtables[type]->whoami);
PMC * proxy = VTABLE_get_class(interp, pmc_ns);
/* Create proxy if not found */
if (PMC_IS_NULL(proxy)) {
/* TODO: doing direct register access is faster, but Lua (at least) seems to depend
on this method call */
/*Parrot_NameSpace_attributes * const nsattrs = PARROT_NAMESPACE(pmc_ns); */
proxy = Parrot_pmc_new_init_int(interp, enum_class_PMCProxy, type);
Parrot_pcc_invoke_method_from_c_args(interp, pmc_ns, CONST_STRING(interp, "set_class"), "P->", proxy);
/*nsattrs->_class = proxy;*/
}
return proxy;
}
}
/*
=item C<PMC * Parrot_oo_get_class_str(PARROT_INTERP, STRING *name)>
Lookup a class object from the string C<name>. If the metaobject is found,
return it. Otherwise, create a new PMCProxy for the type ID number.
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_get_class_str(PARROT_INTERP, ARGIN_NULLOK(STRING *name))
{
ASSERT_ARGS(Parrot_oo_get_class_str)
if (STRING_IS_NULL(name))
return PMCNULL;
else {
/* First check in current HLL namespace */
PMC * const hll_ns = VTABLE_get_pmc_keyed_int(interp, interp->HLL_namespace,
Parrot_pcc_get_HLL(interp, CURRENT_CONTEXT(interp)));
PMC * const ns = Parrot_ns_get_namespace_keyed_str(interp, hll_ns, name);
PMC * const _class = PMC_IS_NULL(ns)
? PMCNULL : VTABLE_get_class(interp, ns);
/* If not found, check for a PMC */
if (PMC_IS_NULL(_class))
return get_pmc_proxy(interp, Parrot_pmc_get_type_str(interp, name));
else
return _class;
}
}
/*
=item C<PMC * Parrot_oo_new_class_pmc(PARROT_INTERP, PMC *classtype)>
Create a class with the type given
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_oo_new_class_pmc(PARROT_INTERP, ARGIN(PMC *classtype))
{
ASSERT_ARGS(Parrot_oo_new_class_pmc)
return Parrot_pmc_new_init(interp, enum_class_Class, classtype);
}
/*
=item C<PMC * Parrot_oo_newclass_from_str(PARROT_INTERP, STRING *name)>
Create a new Class PMC for a new type of the given C<name>.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_newclass_from_str(PARROT_INTERP, ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_newclass_from_str)
PMC * const namearg = Parrot_pmc_new(interp, enum_class_String);
PMC * const namehash = Parrot_pmc_new(interp, enum_class_Hash);
PMC *classobj;
VTABLE_set_string_native(interp, namearg, name);
VTABLE_set_pmc_keyed_str(interp, namehash, CONST_STRING(interp, "name"), namearg);
classobj = Parrot_pmc_new_init(interp, enum_class_Class, namehash);
PARROT_ASSERT(classobj);
return classobj;
}
/*
=item C<PMC * Parrot_oo_find_vtable_override_for_class(PARROT_INTERP, PMC
*classobj, STRING *name)>
Find the vtable override with the specified C<name> in the given C<classobj>
metaobject.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_find_vtable_override_for_class(PARROT_INTERP,
ARGIN(PMC *classobj), ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_find_vtable_override_for_class)
const Parrot_Class_attributes * const class_info = PARROT_CLASS(classobj);
PARROT_ASSERT(PObj_is_class_TEST(classobj));
return VTABLE_get_pmc_keyed_str(interp, class_info->vtable_overrides, name);
}
/*
=item C<PMC * Parrot_oo_find_vtable_override(PARROT_INTERP, PMC *classobj,
STRING *name)>
Lookup a vtable override in a class, including any vtable overrides inherited
from parents.
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_oo_find_vtable_override(PARROT_INTERP,
ARGIN(PMC *classobj), ARGIN(STRING *name))
{
ASSERT_ARGS(Parrot_oo_find_vtable_override)
Parrot_Class_attributes * const _class = PARROT_CLASS(classobj);
PMC *result =
VTABLE_get_pmc_keyed_str(interp, _class->parent_overrides, name);
if (PMC_IS_NULL(result)) {
/* Walk and search for the vtable. */
const INTVAL num_classes = VTABLE_elements(interp, _class->all_parents);
INTVAL i;
for (i = 0; i < num_classes; ++i) {
/* Get the class. */
PMC * const cur_class =
VTABLE_get_pmc_keyed_int(interp, _class->all_parents, i);
result = Parrot_oo_find_vtable_override_for_class(interp,
cur_class, name);
if (!PMC_IS_NULL(result))
break;
}
if (PMC_IS_NULL(result))
result = Parrot_pmc_new(interp, enum_class_Undef);
VTABLE_set_pmc_keyed_str(interp, _class->parent_overrides, name, result);
}
if (result->vtable->base_type == enum_class_Undef)
result = PMCNULL;
return result;
}
/*
=item C<INTVAL Parrot_get_vtable_index(PARROT_INTERP, const STRING *name)>
Return index if C<name> is a valid vtable slot name.
=cut
*/
PARROT_EXPORT
INTVAL
Parrot_get_vtable_index(PARROT_INTERP, ARGIN(const STRING *name))
{
ASSERT_ARGS(Parrot_get_vtable_index)
char * const name_c = Parrot_str_to_cstring(interp, name);
/* some of the first "slots" don't have names. skip 'em. */
INTVAL low = PARROT_VTABLE_LOW;
INTVAL high = NUM_VTABLE_FUNCTIONS + PARROT_VTABLE_LOW;
while (low < high) {
const INTVAL mid = (low + high) / 2;
const char * const meth_c = Parrot_vtable_slot_names[mid];
const INTVAL cmp = strcmp(name_c, meth_c);
if (cmp == 0) {
Parrot_str_free_cstring(name_c);
return mid;
}
else if (cmp > 0)
low = mid + 1;
else
high = mid;
}
Parrot_str_free_cstring(name_c);
return -1;
}
/*
=item C<const char * Parrot_get_vtable_name(PARROT_INTERP, INTVAL idx)>
Return the method name at the specified index in the vtable slot array.
Use this function when you cannot access Parrot_vtable_slot_names directly.
=cut
*/
PARROT_EXPORT
PARROT_PURE_FUNCTION
PARROT_CAN_RETURN_NULL
const char *
Parrot_get_vtable_name(SHIM_INTERP, INTVAL idx)
{
ASSERT_ARGS(Parrot_get_vtable_name)
const INTVAL low = PARROT_VTABLE_LOW;
const INTVAL high = NUM_VTABLE_FUNCTIONS + PARROT_VTABLE_LOW;
PARROT_ASSERT(idx > 0);
if (idx < low || idx > high) {
return NULL;
}
return Parrot_vtable_slot_names[idx];
}
/*
=item C<static INTVAL fail_if_type_exists(PARROT_INTERP, PMC *name)>
This function throws an exception if a PMC or class with the same name *
already exists in the global type registry. The global type registry
will go away eventually, but this allows the new object metamodel to
interact with the old one until it does.
=cut
*/
static INTVAL
fail_if_type_exists(PARROT_INTERP, ARGIN(PMC *name))
{
ASSERT_ARGS(fail_if_type_exists)
PMC * const value = (PMC *)VTABLE_get_pointer_keyed(interp, interp->class_hash, name);
if (PMC_IS_NULL(value))
return 0;
switch (VTABLE_type(interp, value)) {
case enum_class_NameSpace:
return 0;
break;
case enum_class_Integer:
{
const INTVAL type = VTABLE_get_integer(interp, value);
if (type < enum_type_undef) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"native type with name '%s' already exists - "
"can't register Class", data_types[type].name);
}
return type;
}
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INTERP_ERROR,
"Unrecognized class name PMC type");
break;
}
}
/*
=item C<INTVAL Parrot_oo_register_type(PARROT_INTERP, PMC *name, PMC
*_namespace)>
This function registers a type in the global registry, first checking if it
already exists. The global type registry will go away eventually, but this
allows the new object metamodel to interact with the old one until it does.
=cut
*/
PARROT_WARN_UNUSED_RESULT
INTVAL
Parrot_oo_register_type(PARROT_INTERP, ARGIN(PMC *name), ARGIN(PMC *_namespace))
{
ASSERT_ARGS(Parrot_oo_register_type)
INTVAL type;
const INTVAL typeid_exists = fail_if_type_exists(interp, name);
PMC * const classobj = VTABLE_get_class(interp, _namespace);
if (!PMC_IS_NULL(classobj)) {
STRING * const classname = VTABLE_get_string(interp, _namespace);
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Class %Ss already registered!\n",
Parrot_str_escape(interp, classname));
}
/* Type doesn't exist, so go ahead and register it. */
type = Parrot_pmc_get_new_vtable_index(interp);
if (!typeid_exists) {
/* set entry in name->type hash */
PMC * const classname_hash = interp->class_hash;
PMC * const item = Parrot_pmc_new_init_int(interp,
enum_class_Integer, type);
VTABLE_set_pmc_keyed(interp, classname_hash, name, item);
}
return type;
}
/*
=item C<void mark_object_cache(PARROT_INTERP)>
Marks all PMCs in the object method cache as live. This shouldn't strictly be
necessary, as they're likely all reachable from namespaces and classes, but
it's unlikely to hurt anything except mark phase performance.
=cut
*/
#define TBL_SIZE_MASK 0x1ff /* x bits 2..10 */
#define TBL_SIZE (1 + TBL_SIZE_MASK)
void
mark_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(mark_object_cache)
Caches * const mc = interp->caches;
UINTVAL type, entry;
if (!mc)
return;
for (type = 0; type < mc->mc_size; ++type) {
if (!mc->idx[type])
continue;
for (entry = 0; entry < TBL_SIZE; ++entry) {
Meth_cache_entry *e = mc->idx[type][entry];
while (e) {
Parrot_gc_mark_PMC_alive(interp, e->pmc);
e = e->next;
}
}
}
}
/*
=item C<void init_object_cache(PARROT_INTERP)>
Allocate memory for object cache.
=cut
*/
void
init_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(init_object_cache)
Caches * const mc = interp->caches = mem_gc_allocate_zeroed_typed(interp, Caches);
mc->idx = NULL;
}
/*
=item C<void destroy_object_cache(PARROT_INTERP)>
Destroy the object cache. Loop over all caches and invalidate them. Then
free the caches back to the OS.
=cut
*/
void
destroy_object_cache(PARROT_INTERP)
{
ASSERT_ARGS(destroy_object_cache)
UINTVAL i;
Caches * const mc = interp->caches;
/* mc->idx[type][bits] = e; */
for (i = 0; i < mc->mc_size; ++i) {
if (mc->idx[i])
invalidate_type_caches(interp, i);
}
mem_gc_free(interp, mc->idx);
mem_gc_free(interp, mc);
}
/*
=item C<static void invalidate_type_caches(PARROT_INTERP, UINTVAL type)>
Invalidate the cache of the specified type. Free each entry and then free
the entire cache.
=cut
*/
static void
invalidate_type_caches(PARROT_INTERP, UINTVAL type)
{
ASSERT_ARGS(invalidate_type_caches)
Caches * const mc = interp->caches;
INTVAL i;
if (!mc)
return;
/* is it a valid entry */
if (type >= mc->mc_size || !mc->idx[type])
return;
for (i = 0; i < TBL_SIZE; ++i) {
Meth_cache_entry *e = mc->idx[type][i];
while (e) {
Meth_cache_entry * const next = e->next;
mem_gc_free(interp, e);
e = next;
}
}
mem_gc_free(interp, mc->idx[type]);
mc->idx[type] = NULL;
}
/*
=item C<static void invalidate_all_caches(PARROT_INTERP)>
Invalidate all caches by looping over each cache and calling
C<invalidate_type_caches> on them.
=cut
*/
static void
invalidate_all_caches(PARROT_INTERP)
{
ASSERT_ARGS(invalidate_all_caches)
int i;
for (i = 1; i < interp->n_vtable_max; ++i)
invalidate_type_caches(interp, i);
}
/*
=item C<void Parrot_invalidate_method_cache(PARROT_INTERP, STRING *_class)>
Clear method cache for the given class. If class is NULL, caches for
all classes are invalidated.
=cut
*/
PARROT_EXPORT
void
Parrot_invalidate_method_cache(PARROT_INTERP, ARGIN_NULLOK(STRING *_class))
{
ASSERT_ARGS(Parrot_invalidate_method_cache)
INTVAL type;
/* during interp creation and NCI registration the class_hash
* isn't yet up */
if (!interp->class_hash)
return;
if (interp->resume_flag & RESUME_INITIAL)
return;
if (!_class) {
invalidate_all_caches(interp);
return;
}
type = Parrot_pmc_get_type_str(interp, _class);
if (type == 0)
invalidate_all_caches(interp);
else if (type > 0)
invalidate_type_caches(interp, (UINTVAL)type);
}
/*
=item C<PMC * Parrot_find_method_direct(PARROT_INTERP, PMC *_class, STRING
*method_name)>
Find a method PMC for a named method, given the class PMC, current
interpreter, and name of the method. Don't use a possible method cache.
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_find_method_direct(PARROT_INTERP, ARGIN(PMC *_class), ARGIN(STRING *method_name))
{
ASSERT_ARGS(Parrot_find_method_direct)
STRING * const class_str = CONST_STRING(interp, "class");
STRING * const methods_str = CONST_STRING(interp, "methods");
PMC * const mro = _class->vtable->mro;
const INTVAL n = VTABLE_elements(interp, mro);
INTVAL i;
for (i = 0; i < n; ++i) {
PMC * const _class_i = VTABLE_get_pmc_keyed_int(interp, mro, i);
PMC * const ns = VTABLE_get_namespace(interp, _class_i);
PMC * const class_obj = VTABLE_inspect_str(interp, ns, class_str);
PMC *method = PMCNULL;
PMC *method_hash;
if (PMC_IS_NULL(class_obj))
method_hash = VTABLE_inspect_str(interp, ns, methods_str);
else
method_hash = VTABLE_inspect_str(interp, class_obj, methods_str);
if (!PMC_IS_NULL(method_hash))
method = VTABLE_get_pmc_keyed_str(interp, method_hash, method_name);
if (PMC_IS_NULL(method))
method = VTABLE_get_pmc_keyed_str(interp, ns, method_name);
TRACE_FM(interp, _class_i, method_name, method);
if (!PMC_IS_NULL(method))
return method;
}
TRACE_FM(interp, _class, method_name, NULL);
return PMCNULL;
}
/*
=item C<PMC * Parrot_find_method_with_cache(PARROT_INTERP, PMC *_class, STRING
*method_name)>
Find a method PMC for a named method, given the class PMC, current
interp, and name of the method.
This routine should use the current scope's method cache, if there is
one. If not, it creates a new method cache. Or, rather, it will when
we've got that bit working. For now it unconditionally goes and looks up
the name in the global stash.
=cut
*/
PARROT_EXPORT
PARROT_CAN_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC *
Parrot_find_method_with_cache(PARROT_INTERP, ARGIN(PMC *_class), ARGIN(STRING *method_name))
{
ASSERT_ARGS(Parrot_find_method_with_cache)