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[gitmo/Moose.git] / Moose.xs
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1ea12c91 1#include "EXTERN.h"
2#include "perl.h"
3#include "XSUB.h"
4
035fd0c4 5#define NEED_newRV_noinc
6#define NEED_newSVpvn_share
7#define NEED_sv_2pv_flags
8#include "ppport.h"
9
10#ifndef XSPROTO
11#define XSPROTO(name) void name(pTHX_ CV* cv)
12#endif
13
14#ifndef gv_stashpvs
15#define gv_stashpvs(x, y) gv_stashpvn(STR_WITH_LEN(x), y)
16#endif
17
1ea12c91 18/* FIXME
1ea12c91 19 * type constraints are already implemented by konobi
20 * should be trivial to do coercions for the core types, too
21 *
22 * TypeConstraint::Class can compare SvSTASH by ptr, and if it's neq *then*
23 * call ->isa (should handle vast majority of cases)
24 *
25 * base parametrized types are also trivial
26 *
27 * ClassName is get_stathpvn
28 */
29
30/* FIXME
de2f2e97 31 * for a constructor we have ATTR *attrs, and iterate that, removing init_arg
1ea12c91 32 * we can preallocate the structure to the right size (maybe even with the
33 * right HEs?), and do various other prehashing hacks to gain speed
34 * */
35
36/* FIXME
37 * delegations and attribute helpers:
38 *
39 * typedef struct {
de2f2e97 40 * ATTR *attr;
1ea12c91 41 * pv *method;
42 * } delegation;
43 *
44 * typedef struct {
de2f2e97 45 * ATTR *attr;
1ea12c91 46 * I32 *type; // hash, array, whatever + vtable for operation
47 * } attributehelper;
48 */
49
de2f2e97 50
51STATIC MGVTBL null_mg_vtbl = {
52 NULL, /* get */
53 NULL, /* set */
54 NULL, /* len */
55 NULL, /* clear */
56 NULL, /* free */
57#if MGf_COPY
58 NULL, /* copy */
59#endif /* MGf_COPY */
60#if MGf_DUP
61 NULL, /* dup */
62#endif /* MGf_DUP */
63#if MGf_LOCAL
64 NULL, /* local */
65#endif /* MGf_LOCAL */
66};
67
f253044f 68STATIC MAGIC *stash_in_mg (pTHX_ SV *sv, SV *obj) {
69 MAGIC *mg = sv_magicext(sv, obj, PERL_MAGIC_ext, &null_mg_vtbl, NULL, 0 );
70 mg->mg_flags |= MGf_REFCOUNTED;
71
72 return mg;
73}
74
75STATIC SV *get_stashed_in_mg(pTHX_ SV *sv) {
76 MAGIC *mg, *moremagic;
77
78 if (SvTYPE(sv) >= SVt_PVMG) {
79 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
80 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_virtual == &null_mg_vtbl))
81 break;
82 }
83 if (mg)
84 return mg->mg_obj;
85 }
86
87 return NULL;
88}
de2f2e97 89
4c6fbfb1 90/* this is a enum of checks */
de2f2e97 91typedef enum {
4c6fbfb1 92 Any, /* or item, or bool */
93 Undef,
94 Defined,
95 Str, /* or value */
96 Num,
97 Int,
98 GlobRef, /* SVt_PVGV */
99 ArrayRef, /* SVt_PVAV */
100 HashRef, /* SVt_PVHV */
101 CodeRef, /* SVt_PVCV */
102 Ref,
103 ScalarRef,
104 FileHandle,
105 RegexpRef,
106 Object,
160f9ca7 107 ClassName,
4c6fbfb1 108 /* complex checks */
109 Role,
4c6fbfb1 110 Enum,
de2f2e97 111} TC;
112
de2f2e97 113typedef enum {
114 tc_none = 0,
115 tc_type,
160f9ca7 116 tc_stash,
de2f2e97 117 tc_cv,
de2f2e97 118 tc_op,
4c6fbfb1 119 tc_fptr,
de2f2e97 120} tc_kind;
121
122typedef union {
4c6fbfb1 123 TC type;
7ce1a351 124 SV *sv;
4c6fbfb1 125 OP *op;
4c6fbfb1 126 bool (*fptr)(pTHX_ SV *type_constraint, SV *sv);
127} TC_CHECK;
128
129typedef union {
de2f2e97 130 char *builder;
131 SV *value;
132 CV *sub;
133 OP *op;
134 U32 type;
135} DEFAULT;
136
137typedef enum {
138 default_none = 0,
139 default_type,
140 default_builder,
141 default_value,
142 default_sub,
143 default_op,
144} default_kind;
145
1ea12c91 146typedef struct {
de2f2e97 147 /* the meta instance struct */
148 struct mi *mi;
149
150 U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
151
152 /* slot access fields */
153 SV *slot_sv; /* value of the slot (slot name presumably) */
154 U32 slot_u32; /* for optimized access (precomputed hash or otherr) */
155
156 DEFAULT def; /* cv, value or other, depending on flags */
157
158 TC_CHECK tc_check; /* cv, value or other, dependidng on flags */
159 SV *type_constraint; /* meta attr */
160
161 CV *initializer;
162 CV *trigger;
163
f253044f 164 SV *meta_attr; /* the meta attr object */
de2f2e97 165 AV *cvs; /* CVs which use this attr */
166} ATTR;
167
168/* slot flags:
169 * instance reading writing
170 * 00000000 00000000 00000000 00000000
7ce1a351 171 * ^ trigger
172 * ^ weak
173 * ^ tc refcnt
de2f2e97 174 * ^^^ tc_kind
175 * ^ coerce
176 * ^^^ default_kind
177 * ^ lazy
178 * ^ required
179 * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
180 */
181
182#define ATTR_INSTANCE_MASK 0xff000000
183#define ATTR_READING_MASK 0x0000ff00
184#define ATTR_WRITING_MASK 0x000000ff
185
186#define ATTR_MASK_TYPE 0x7
187
188#define ATTR_MASK_DEFAULT 0x700
189#define ATTR_SHIFT_DEAFULT 8
190
191#define ATTR_LAZY 0x800
192
7ce1a351 193#define ATTR_COERCE 0x8
194#define ATTR_TCREFCNT 0x10
195#define ATTR_WEAK 0x20
196#define ATTR_TRIGGER 0x40
de2f2e97 197
198#define ATTR_ISWEAK(attr) ( attr->flags & ATTR_WEAK )
199#define ATTR_ISLAZY(attr) ( attr->flags & ATTR_LAZY )
200#define ATTR_ISCOERCE(attr) ( attr->flags & ATTR_COERCE )
1ea12c91 201
de2f2e97 202#define ATTR_TYPE(f) ( attr->flags & 0x7 )
203#define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
1ea12c91 204
de2f2e97 205#define ATTR_DUMB_READER(attr) !ATTR_IS_LAZY(attr)
206#define ATTR_DUMB_WRITER(attr) ( ( attr->flags & ATTR_WRITING_MASK ) == 0 )
207#define ATTR_DUMB_INSTANCE(attr) ( ( attr->flags & ATTR_INSTANCE_MASK ) == 0 )
1ea12c91 208
f253044f 209#define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
de2f2e97 210
211
212/* FIXME define a vtable that does call_sv */
213typedef struct {
214 SV * (*get)(pTHX_ SV *self, ATTR *attr);
215 void (*set)(pTHX_ SV *self, ATTR *attr, SV *value);
216 bool * (*has)(pTHX_ SV *self, ATTR *attr);
217 SV * (*delete)(pTHX_ SV *self, ATTR *attr);
218} instance_vtbl;
219
220
221typedef enum {
222 hash = 0,
223
224 /* these are not yet implemented */
225 array,
226 fptr,
227 cv,
228 judy,
229} instance_types;
230
231typedef struct mi {
de2f2e97 232 HV *stash;
233
234 /* slot access method */
235 instance_types type;
236 instance_vtbl *vtbl;
237
238 /* attr descriptors */
239 I32 num_attrs;
240 ATTR *attrs;
241} MI;
242
243
4c6fbfb1 244
245
246STATIC bool check_is_scalar_ref(SV *sv) {
247 if( SvROK(sv) ) {
248 switch (SvTYPE(SvRV(sv))) {
249 case SVt_IV:
250 case SVt_NV:
251 case SVt_PV:
252 case SVt_NULL:
253 return 1;
254 break;
255 default:
256 return 0;
257 }
258 }
259 return 0;
260}
261
262STATIC bool check_reftype(TC type, SV *sv) {
263 int svt;
264
265 if ( !SvROK(sv) )
266 return 0;
267
268 switch (type) {
269 case GlobRef:
270 svt = SVt_PVGV;
271 break;
272 case ArrayRef:
273 svt = SVt_PVAV;
274 break;
275 case HashRef:
276 svt = SVt_PVHV;
277 break;
278 case CodeRef:
279 svt = SVt_PVCV;
280 break;
281 }
282
160f9ca7 283 return SvTYPE(SvRV(sv)) == svt;
4c6fbfb1 284}
285
7ce1a351 286STATIC bool check_sv_class(pTHX_ HV *stash, SV *sv) {
4c6fbfb1 287 dSP;
288 bool ret;
7ce1a351 289 SV *rv;
4c6fbfb1 290
291 if (!sv)
292 return 0;
293 SvGETMAGIC(sv);
294 if (!SvROK(sv))
295 return 0;
7ce1a351 296 rv = (SV*)SvRV(sv);
297 if (!SvOBJECT(rv))
4c6fbfb1 298 return 0;
7ce1a351 299 if (SvSTASH(rv) == stash)
4c6fbfb1 300 return 1;
301
302 ENTER;
303 SAVETMPS;
304 PUSHMARK(SP);
305 XPUSHs(sv);
7ce1a351 306 XPUSHs(sv_2mortal(newSVpv(HvNAME_get(stash), 0)));
4c6fbfb1 307 PUTBACK;
308
309 call_method("isa", G_SCALAR);
310
311 SPAGAIN;
312 ret = SvTRUE(TOPs);
313
314 FREETMPS;
315 LEAVE;
316
317 return ret;
318}
319
320STATIC bool check_sv_type (TC type, SV *sv) {
321 if (!sv)
322 return 0;
160f9ca7 323
4c6fbfb1 324 switch (type) {
325 case Any:
326 return 1;
327 break;
328 case Undef:
329 return !SvOK(sv);
330 break;
331 case Defined:
332 return SvOK(sv);
333 break;
334 case Str:
335 return (SvOK(sv) && !SvROK(sv));
160f9ca7 336 case Num:
337#if (PERL_VERSION < 8) || (PERL_VERSION == 8 && PERL_SUBVERSION <5)
338 if (!SvPOK(sv) && !SvPOKp(sv))
339 return SvFLAGS(sv) & (SVf_NOK|SVp_NOK|SVf_IOK|SVp_IOK);
340 else
341#endif
342 return looks_like_number(sv);
343 break;
344 case Int:
345 if ( SvIOK(sv) ) {
346 return 1;
347 } else if ( SvPOK(sv) ) {
160f9ca7 348 int i;
349 STRLEN len;
350 char *pv = SvPV(sv, len);
351 char *end = pv + len;
352
353 errno = 0;
354 i = strtol(pv, &end, 0);
355 return !errno;
356 }
357 return 0;
358 break;
4c6fbfb1 359 case Ref:
360 return SvROK(sv);
361 break;
362 case ScalarRef:
363 return check_is_scalar_ref(sv);
364 break;
365 case ArrayRef:
366 case HashRef:
367 case CodeRef:
368 case GlobRef:
369 return check_reftype(type, sv);
370 break;
371 case Object:
372 return sv_isobject(sv);
373 break;
160f9ca7 374 case ClassName:
7ce1a351 375 if ( SvOK(sv) && !SvROK(sv) ) {
160f9ca7 376 STRLEN len;
377 char *pv;
378 pv = SvPV(sv, len);
379 return ( gv_stashpvn(pv, len, 0) != NULL );
160f9ca7 380 }
7ce1a351 381 return 0;
382 break;
4c6fbfb1 383 case RegexpRef:
384 return sv_isa(sv, "Regexp");
385 break;
386 case FileHandle:
387 croak("todo");
388 break;
389 default:
390 croak("todo");
391 }
392
393 return 0;
394}
395
160f9ca7 396STATIC bool check_type_constraint(pTHX_ tc_kind kind, TC_CHECK tc_check, SV *type_constraint, SV *sv) {
4c6fbfb1 397 switch (kind) {
398 case tc_none:
399 return 1;
400 break;
401 case tc_type:
402 return check_sv_type(tc_check.type, sv);
403 break;
404 case tc_stash:
7ce1a351 405 return check_sv_class(aTHX_ (HV *)tc_check.sv, sv);
4c6fbfb1 406 break;
4c6fbfb1 407 case tc_fptr:
408 return tc_check.fptr(aTHX_ type_constraint, sv);
409 break;
410 case tc_cv:
411 case tc_op:
412 croak("todo");
413 break;
414 }
415
416 croak("todo");
417 return 0;
418}
419
420
160f9ca7 421STATIC void init_attr (MI *mi, ATTR *attr, AV *desc) {
422 U32 flags = 0;
1ea12c91 423 U32 hash;
424 STRLEN len;
de2f2e97 425 char *pv;
160f9ca7 426 I32 ix = av_len(desc);
427 SV **params = AvARRAY(desc);
428 SV *tc;
429 SV *key;
de2f2e97 430
431 attr->mi = mi;
432
de2f2e97 433
160f9ca7 434 if ( ix != 12 )
435 croak("wrong number of args (%d != 13)", ix + 1);
de2f2e97 436
160f9ca7 437 for ( ; ix >= 0; ix-- ) {
438 if ( !params[ix] || params[ix] == &PL_sv_undef )
439 croak("bad params");
440 }
441
442 if ( !SvROK(params[1]) || SvTYPE(SvRV(params[1])) != SVt_PVAV )
443 croak("slots is not an array");
de2f2e97 444
160f9ca7 445 if ( av_len((AV *)SvRV(params[1])) != 0 )
446 croak("Only unary slots are supported at the moment");
1ea12c91 447
160f9ca7 448 /* calculate a hash from the slot */
449 /* FIXME arrays etc should also be supported */
450 key = *av_fetch((AV *)SvRV(params[1]), 0, 0);
451 pv = SvPV(key, len);
1ea12c91 452 PERL_HASH(hash, pv, len);
1ea12c91 453
de2f2e97 454
160f9ca7 455 /* FIXME better organize these */
456 if ( SvTRUE(params[2]) )
457 flags |= ATTR_WEAK;
458
459 if ( SvTRUE(params[3]) )
460 flags |= ATTR_COERCE;
de2f2e97 461
160f9ca7 462 if ( SvTRUE(params[4]) )
463 flags |= ATTR_LAZY;
de2f2e97 464
160f9ca7 465 tc = params[5];
de2f2e97 466
160f9ca7 467 if ( SvOK(tc) ) {
468 int tc_kind = SvIV(params[6]);
469 SV *data = params[7];
470
471 switch (tc_kind) {
160f9ca7 472 case tc_type:
473 attr->tc_check.type = SvIV(data);
474 break;
7ce1a351 475 case tc_stash:
476 flags |= ATTR_TCREFCNT;
477 attr->tc_check.sv = (SV *)gv_stashsv(data, 0);
478 break;
160f9ca7 479 case tc_cv:
7ce1a351 480 flags |= ATTR_TCREFCNT;
481 attr->tc_check.sv = SvRV(data);
482 if ( SvTYPE(attr->tc_check.sv) != SVt_PVCV )
160f9ca7 483 croak("compiled type constraint is not a coderef");
484 break;
485 default:
486 croak("todo");
487 }
488
489 flags |= tc_kind;
490 }
491
492 attr->flags = flags; /* FIXME default_kind */
493
494 attr->trigger = SvROK(params[6]) ? (CV *)SvRV(params[6]) : NULL;
495 if ( attr->trigger && SvTYPE(attr->trigger) != SVt_PVCV )
496 croak("trigger is not a coderef");
497
498 attr->initializer = SvROK(params[7]) ? (CV *)SvRV(params[7]) : NULL;
499 if ( attr->initializer && SvTYPE(attr->initializer) != SVt_PVCV )
500 croak("initializer is not a coderef");
501
502 /* copy refs */
503 attr->meta_attr = newSVsv(params[0]);
504 attr->type_constraint = newSVsv(tc);
7ce1a351 505 SvREFCNT_inc(attr->trigger);
506 SvREFCNT_inc(attr->initializer);
507 if ( flags & ATTR_TCREFCNT ) SvREFCNT_inc(attr->tc_check.sv);
160f9ca7 508
509 attr->slot_sv = newSVpvn_share(pv, len, hash);
510 attr->slot_u32 = hash;
511
512 attr->def.type = 0;
de2f2e97 513
514 /* cross refs to CVs which use this struct */
515 attr->cvs = newAV();
516}
517
f253044f 518STATIC MI *new_mi (pTHX_ HV *stash, AV *attrs) {
de2f2e97 519 MI *mi;
520 I32 ix;
521 const I32 num = av_len(attrs) + 1;
522
523 Newx(mi, 1, MI);
524
525 SvREFCNT_inc_simple(stash);
526 mi->stash = stash;
527
de2f2e97 528 mi->type = 0; /* nothing else implemented yet */
529
530 /* initialize attributes */
531 mi->num_attrs = num;
532 Newx(mi->attrs, num, ATTR);
f253044f 533 for ( ix = 0; ix < num; ix++ ) {
de2f2e97 534 SV **desc = av_fetch(attrs, ix, 0);
535
160f9ca7 536 if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVAV) ) {
de2f2e97 537 croak("Attribute descriptor has to be a hash reference");
f253044f 538 }
de2f2e97 539
160f9ca7 540 init_attr(mi, &mi->attrs[ix], (AV *)SvRV(*desc));
de2f2e97 541 }
542
543 return mi;
544}
545
7ce1a351 546STATIC void delete_mi (pTHX_ MI *mi) {
547 I32 i, j;
548
549 for ( i = 0; i < mi->num_attrs; i++ ) {
550 ATTR *attr = &mi->attrs[i];
551 /* clear the pointers to this meta attr from all the CVs */
552 SV **cvs = AvARRAY(attr->cvs);
553 for ( j = av_len(attr->cvs); j >= 0; j-- ) {
554 CV *cv = cvs[j];
555 XSANY.any_i32 = 0;
556 }
557
558 SvREFCNT_dec(attr->cvs);
559 SvREFCNT_dec(attr->slot_sv);
560 SvREFCNT_dec(attr->type_constraint);
561 if ( attr->flags & ATTR_TCREFCNT ) SvREFCNT_dec(attr->tc_check.sv);
562 SvREFCNT_dec(attr->initializer);
563 SvREFCNT_dec(attr->trigger);
564 SvREFCNT_dec(attr->meta_attr);
565 }
566
567 Safefree(mi->attrs);
568 Safefree(mi);
569}
570
f253044f 571STATIC SV *new_mi_obj (pTHX_ MI *mi) {
035fd0c4 572 HV *stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
573 SV *obj = newRV_noinc(newSViv(PTR2IV(mi)));
574 sv_bless( obj, stash );
575 return obj;
f253044f 576}
de2f2e97 577
f253044f 578STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
579 dSP;
580 I32 count;
581 SV *mi;
582
583 if ( !meta_attr )
584 croak("No attr found in magic!");
585
586 ENTER;
587 SAVETMPS;
588 PUSHMARK(SP);
589 XPUSHs(meta_attr);
590 PUTBACK;
591 count = call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
592
593 if ( count != 1 )
594 croak("attr_to_meta_instance borked (%d args returned, expecting 1)", count);
595
596 SPAGAIN;
597 mi = POPs;
598
599 SvREFCNT_inc(mi);
600
601 PUTBACK;
602 FREETMPS;
603 LEAVE;
604
605 return mi;
606}
607
608STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
609 dSP;
610 I32 count;
611 MI *mi = NULL;
612 SV *class;
613 SV *attrs;
614 HV *stash;
615
616 ENTER;
617 SAVETMPS;
618 PUSHMARK(SP);
619 XPUSHs(perl_mi);
620 PUTBACK;
621 count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
622
623 if ( count != 2 )
624 croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", count);
625
626 SPAGAIN;
627 attrs = POPs;
628 class = POPs;
629
630 PUTBACK;
631
632 stash = gv_stashsv(class, 0);
633
634 mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
635
636 FREETMPS;
637 LEAVE;
638
639 return new_mi_obj(aTHX_ mi);
640}
641
642STATIC ATTR *mi_find_attr(MI *mi, SV *meta_attr) {
643 I32 ix;
644
035fd0c4 645 for ( ix = 0; ix < mi->num_attrs; ix++ ) {
f253044f 646 if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
647 return &mi->attrs[ix];
de2f2e97 648 }
de2f2e97 649 }
650
f253044f 651 sv_dump(meta_attr);
652 croak("Attr not found");
de2f2e97 653 return NULL;
654}
655
656STATIC ATTR *get_attr(pTHX_ CV *cv) {
f253044f 657 SV *meta_attr = get_stashed_in_mg(aTHX_ (SV *)cv);
658 SV *perl_mi = attr_to_meta_instance(aTHX_ meta_attr);
659 SV *c_mi = get_stashed_in_mg(aTHX_ SvRV(perl_mi));
660 MI *mi;
de2f2e97 661
f253044f 662 if (!c_mi) {
663 c_mi = perl_mi_to_c_mi(aTHX_ perl_mi);
e10d45dc 664 stash_in_mg(aTHX_ SvRV(perl_mi), c_mi);
7ce1a351 665 SvREFCNT_dec(c_mi);
f253044f 666 }
667
668 sv_2mortal(perl_mi);
669
670 mi = INT2PTR(MI *, SvIV(SvRV(c_mi)));
671
672 return mi_find_attr(mi, meta_attr);
1ea12c91 673}
674
de2f2e97 675STATIC ATTR *define_attr (pTHX_ CV *cv) {
676 ATTR *attr = get_attr(aTHX_ cv);
677 assert(attr);
678
679 XSANY.any_i32 = PTR2IV(attr);
f253044f 680
7ce1a351 681 SvREFCNT_inc(cv);
f253044f 682 av_push( attr->cvs, (SV *)cv );
de2f2e97 683
684 return attr;
685}
686
687STATIC void weaken(pTHX_ SV *sv) {
1ea12c91 688#ifdef SvWEAKREF
de2f2e97 689 sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
1ea12c91 690#else
691 croak("weak references are not implemented in this release of perl");
692#endif
693}
694
695
696/* meta instance protocol */
697
de2f2e97 698STATIC SV *get_slot_value(pTHX_ SV *self, ATTR *attr) {
1ea12c91 699 HE *he;
700
701 assert(self);
702 assert(SvROK(self));
703 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
704
de2f2e97 705 assert( ATTR_DUMB_INSTANCE(attr) );
706
707 if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
1ea12c91 708 return HeVAL(he);
709 else
710 return NULL;
711}
712
de2f2e97 713STATIC void set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
1ea12c91 714 HE *he;
4c6fbfb1 715 SV *copy;
1ea12c91 716
717 assert(self);
718 assert(SvROK(self));
719 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
720
de2f2e97 721 assert( ATTR_DUMB_INSTANCE(attr) );
722
4c6fbfb1 723 copy = newSVsv(value);
724
725 he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, copy, attr->slot_u32);
1ea12c91 726
1ea12c91 727 if (he != NULL) {
de2f2e97 728 if ( ATTR_ISWEAK(attr) )
4c6fbfb1 729 weaken(aTHX_ HeVAL(he));
1ea12c91 730 } else {
4c6fbfb1 731 SvREFCNT_dec(copy);
1ea12c91 732 croak("Hash store failed.");
733 }
734}
735
de2f2e97 736STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
1ea12c91 737 assert(self);
738 assert(SvROK(self));
739 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
740
de2f2e97 741 assert( ATTR_DUMB_INSTANCE(attr) );
742
743 return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
744}
745
746STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
747 assert(self);
748 assert(SvROK(self));
749 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
750
751 assert( ATTR_DUMB_INSTANCE(attr) );
752
753 return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
1ea12c91 754}
755
160f9ca7 756STATIC SV *getter_common(pTHX_ SV *self, ATTR *attr) {
757 assert( ATTR_DUMB_READER(attr) );
758 return get_slot_value(aTHX_ self, attr);
759}
760
761STATIC void setter_common(pTHX_ SV *self, ATTR *attr, SV *value) {
762 if ( attr->flags & ATTR_MASK_TYPE ) {
763 if ( !check_type_constraint(aTHX_ attr->flags & ATTR_MASK_TYPE, attr->tc_check, attr->type_constraint, value) )
764 croak("Bad param");
765 }
766
767 set_slot_value(aTHX_ self, attr, value);
768}
1ea12c91 769
770/* simple high level api */
771
de2f2e97 772STATIC XS(getter);
773STATIC XS(getter)
1ea12c91 774{
775#ifdef dVAR
776 dVAR;
777#endif
778 dXSARGS;
de2f2e97 779 dATTR;
1ea12c91 780 SV *value;
781
782 if (items != 1)
783 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
784
785 SP -= items;
786
160f9ca7 787 value = getter_common(aTHX_ ST(0), attr);
1ea12c91 788
789 if (value) {
790 ST(0) = sv_mortalcopy(value); /* mortalcopy because $_ .= "blah" for $foo->bar */
791 XSRETURN(1);
792 } else {
793 XSRETURN_UNDEF;
794 }
795}
796
de2f2e97 797STATIC XS(setter);
798STATIC XS(setter)
1ea12c91 799{
800#ifdef dVAR
801 dVAR;
802#endif
803 dXSARGS;
de2f2e97 804 dATTR;
1ea12c91 805
806 if (items != 2)
807 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
808
809 SP -= items;
810
160f9ca7 811 setter_common(aTHX_ ST(0), attr, ST(1));
1ea12c91 812
813 ST(0) = ST(1); /* return value */
814 XSRETURN(1);
815}
816
de2f2e97 817STATIC XS(accessor);
818STATIC XS(accessor)
1ea12c91 819{
820#ifdef dVAR
821 dVAR;
822#endif
823 dXSARGS;
de2f2e97 824 dATTR;
1ea12c91 825
826 if (items < 1)
827 Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
828
829 SP -= items;
830
831 if (items > 1) {
160f9ca7 832 setter_common(aTHX_ ST(0), attr, ST(1));
1ea12c91 833 ST(0) = ST(1); /* return value */
834 } else {
160f9ca7 835 SV *value = getter_common(aTHX_ ST(0), attr);
1ea12c91 836 if ( value ) {
837 ST(0) = value;
838 } else {
839 XSRETURN_UNDEF;
840 }
841 }
842
843 XSRETURN(1);
844}
845
846STATIC XS(predicate);
847STATIC XS(predicate)
848{
849#ifdef dVAR
850 dVAR;
851#endif
852 dXSARGS;
de2f2e97 853 dATTR;
1ea12c91 854
855 if (items != 1)
856 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
857
858 SP -= items;
859
de2f2e97 860 if ( has_slot_value(aTHX_ ST(0), attr) )
1ea12c91 861 XSRETURN_YES;
862 else
863 XSRETURN_NO;
864}
865
866enum xs_body {
de2f2e97 867 xs_body_getter = 0,
868 xs_body_setter,
869 xs_body_accessor,
1ea12c91 870 xs_body_predicate,
871 max_xs_body
872};
873
874STATIC XSPROTO ((*xs_bodies[])) = {
de2f2e97 875 getter,
876 setter,
877 accessor,
1ea12c91 878 predicate,
879};
880
881MODULE = Moose PACKAGE = Moose::XS
882
883CV *
de2f2e97 884new_sub(attr, name)
1ea12c91 885 INPUT:
de2f2e97 886 SV *attr;
887 SV *name;
1ea12c91 888 ALIAS:
de2f2e97 889 new_getter = xs_body_getter
890 new_setter = xs_body_setter
891 new_accessor = xs_body_accessor
892 new_predicate = xs_body_predicate
1ea12c91 893 PREINIT:
894 CV * cv;
895 CODE:
896 if ( ix >= max_xs_body )
897 croak("Unknown Moose::XS body type");
898
de2f2e97 899 if ( !sv_isobject(attr) )
900 croak("'attr' must be a Moose::Meta::Attribute");
901
902 cv = newXS(SvOK(name) ? SvPV_nolen(name) : NULL, xs_bodies[ix], __FILE__);
1ea12c91 903
904 if (cv == NULL)
905 croak("Oi vey!");
906
de2f2e97 907 /* associate CV with meta attr */
f253044f 908 stash_in_mg(aTHX_ (SV *)cv, attr);
de2f2e97 909
910 /* this will be set on first call */
911 XSANY.any_i32 = 0;
1ea12c91 912
913 RETVAL = cv;
914 OUTPUT:
915 RETVAL
916
917
f253044f 918MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
919
920void
921DESTROY(self)
922 INPUT:
923 SV *self;
924 PREINIT:
925 MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));
926 CODE:
7ce1a351 927 delete_mi(aTHX_ mi);
A Postmodern Object System for Perl5 - now lives at https://github.com/moose/Moose