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remove FIXMEs
[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 * delegations and attribute helpers:
20 *
21 * typedef struct {
de2f2e97 22 * ATTR *attr;
1ea12c91 23 * pv *method;
24 * } delegation;
25 *
26 * typedef struct {
de2f2e97 27 * ATTR *attr;
1ea12c91 28 * I32 *type; // hash, array, whatever + vtable for operation
29 * } attributehelper;
30 */
31
de2f2e97 32
33STATIC MGVTBL null_mg_vtbl = {
34 NULL, /* get */
35 NULL, /* set */
36 NULL, /* len */
37 NULL, /* clear */
38 NULL, /* free */
39#if MGf_COPY
40 NULL, /* copy */
41#endif /* MGf_COPY */
42#if MGf_DUP
43 NULL, /* dup */
44#endif /* MGf_DUP */
45#if MGf_LOCAL
46 NULL, /* local */
47#endif /* MGf_LOCAL */
48};
49
f253044f 50STATIC MAGIC *stash_in_mg (pTHX_ SV *sv, SV *obj) {
51 MAGIC *mg = sv_magicext(sv, obj, PERL_MAGIC_ext, &null_mg_vtbl, NULL, 0 );
52 mg->mg_flags |= MGf_REFCOUNTED;
53
54 return mg;
55}
56
57STATIC SV *get_stashed_in_mg(pTHX_ SV *sv) {
58 MAGIC *mg, *moremagic;
59
60 if (SvTYPE(sv) >= SVt_PVMG) {
61 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
62 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_virtual == &null_mg_vtbl))
63 break;
64 }
65 if (mg)
66 return mg->mg_obj;
67 }
68
69 return NULL;
70}
de2f2e97 71
4c6fbfb1 72/* this is a enum of checks */
de2f2e97 73typedef enum {
4c6fbfb1 74 Any, /* or item, or bool */
75 Undef,
76 Defined,
77 Str, /* or value */
78 Num,
79 Int,
80 GlobRef, /* SVt_PVGV */
81 ArrayRef, /* SVt_PVAV */
82 HashRef, /* SVt_PVHV */
83 CodeRef, /* SVt_PVCV */
84 Ref,
85 ScalarRef,
86 FileHandle,
87 RegexpRef,
88 Object,
160f9ca7 89 ClassName,
4c6fbfb1 90 /* complex checks */
91 Role,
4c6fbfb1 92 Enum,
de2f2e97 93} TC;
94
de2f2e97 95typedef enum {
96 tc_none = 0,
97 tc_type,
160f9ca7 98 tc_stash,
de2f2e97 99 tc_cv,
de2f2e97 100 tc_op,
4c6fbfb1 101 tc_fptr,
de2f2e97 102} tc_kind;
103
104typedef union {
4c6fbfb1 105 TC type;
7ce1a351 106 SV *sv;
4c6fbfb1 107 OP *op;
4c6fbfb1 108 bool (*fptr)(pTHX_ SV *type_constraint, SV *sv);
109} TC_CHECK;
110
111typedef union {
de2f2e97 112 char *builder;
113 SV *value;
114 CV *sub;
115 OP *op;
116 U32 type;
117} DEFAULT;
118
119typedef enum {
120 default_none = 0,
121 default_type,
122 default_builder,
123 default_value,
124 default_sub,
125 default_op,
126} default_kind;
127
1ea12c91 128typedef struct {
de2f2e97 129 /* the meta instance struct */
130 struct mi *mi;
131
132 U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
133
134 /* slot access fields */
135 SV *slot_sv; /* value of the slot (slot name presumably) */
136 U32 slot_u32; /* for optimized access (precomputed hash or otherr) */
137
138 DEFAULT def; /* cv, value or other, depending on flags */
139
140 TC_CHECK tc_check; /* cv, value or other, dependidng on flags */
141 SV *type_constraint; /* meta attr */
142
143 CV *initializer;
144 CV *trigger;
145
f253044f 146 SV *meta_attr; /* the meta attr object */
de2f2e97 147 AV *cvs; /* CVs which use this attr */
148} ATTR;
149
150/* slot flags:
151 * instance reading writing
152 * 00000000 00000000 00000000 00000000
7ce1a351 153 * ^ trigger
154 * ^ weak
155 * ^ tc refcnt
de2f2e97 156 * ^^^ tc_kind
157 * ^ coerce
158 * ^^^ default_kind
159 * ^ lazy
160 * ^ required
161 * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
162 */
163
164#define ATTR_INSTANCE_MASK 0xff000000
165#define ATTR_READING_MASK 0x0000ff00
166#define ATTR_WRITING_MASK 0x000000ff
167
168#define ATTR_MASK_TYPE 0x7
169
170#define ATTR_MASK_DEFAULT 0x700
171#define ATTR_SHIFT_DEAFULT 8
172
173#define ATTR_LAZY 0x800
174
7ce1a351 175#define ATTR_COERCE 0x8
176#define ATTR_TCREFCNT 0x10
177#define ATTR_WEAK 0x20
178#define ATTR_TRIGGER 0x40
de2f2e97 179
180#define ATTR_ISWEAK(attr) ( attr->flags & ATTR_WEAK )
181#define ATTR_ISLAZY(attr) ( attr->flags & ATTR_LAZY )
182#define ATTR_ISCOERCE(attr) ( attr->flags & ATTR_COERCE )
1ea12c91 183
de2f2e97 184#define ATTR_TYPE(f) ( attr->flags & 0x7 )
185#define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
1ea12c91 186
de2f2e97 187#define ATTR_DUMB_READER(attr) !ATTR_IS_LAZY(attr)
188#define ATTR_DUMB_WRITER(attr) ( ( attr->flags & ATTR_WRITING_MASK ) == 0 )
189#define ATTR_DUMB_INSTANCE(attr) ( ( attr->flags & ATTR_INSTANCE_MASK ) == 0 )
1ea12c91 190
f253044f 191#define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
de2f2e97 192
193
194/* FIXME define a vtable that does call_sv */
195typedef struct {
196 SV * (*get)(pTHX_ SV *self, ATTR *attr);
197 void (*set)(pTHX_ SV *self, ATTR *attr, SV *value);
198 bool * (*has)(pTHX_ SV *self, ATTR *attr);
199 SV * (*delete)(pTHX_ SV *self, ATTR *attr);
200} instance_vtbl;
201
202
203typedef enum {
204 hash = 0,
205
206 /* these are not yet implemented */
207 array,
208 fptr,
209 cv,
210 judy,
211} instance_types;
212
213typedef struct mi {
de2f2e97 214 HV *stash;
215
216 /* slot access method */
217 instance_types type;
218 instance_vtbl *vtbl;
219
220 /* attr descriptors */
221 I32 num_attrs;
222 ATTR *attrs;
223} MI;
224
225
4c6fbfb1 226
227
228STATIC bool check_is_scalar_ref(SV *sv) {
229 if( SvROK(sv) ) {
230 switch (SvTYPE(SvRV(sv))) {
231 case SVt_IV:
232 case SVt_NV:
233 case SVt_PV:
234 case SVt_NULL:
235 return 1;
236 break;
237 default:
238 return 0;
239 }
240 }
241 return 0;
242}
243
244STATIC bool check_reftype(TC type, SV *sv) {
245 int svt;
246
247 if ( !SvROK(sv) )
248 return 0;
249
250 switch (type) {
251 case GlobRef:
252 svt = SVt_PVGV;
253 break;
254 case ArrayRef:
255 svt = SVt_PVAV;
256 break;
257 case HashRef:
258 svt = SVt_PVHV;
259 break;
260 case CodeRef:
261 svt = SVt_PVCV;
262 break;
263 }
264
160f9ca7 265 return SvTYPE(SvRV(sv)) == svt;
4c6fbfb1 266}
267
7ce1a351 268STATIC bool check_sv_class(pTHX_ HV *stash, SV *sv) {
4c6fbfb1 269 dSP;
270 bool ret;
7ce1a351 271 SV *rv;
4c6fbfb1 272
273 if (!sv)
274 return 0;
275 SvGETMAGIC(sv);
276 if (!SvROK(sv))
277 return 0;
7ce1a351 278 rv = (SV*)SvRV(sv);
279 if (!SvOBJECT(rv))
4c6fbfb1 280 return 0;
7ce1a351 281 if (SvSTASH(rv) == stash)
4c6fbfb1 282 return 1;
283
284 ENTER;
285 SAVETMPS;
286 PUSHMARK(SP);
287 XPUSHs(sv);
7ce1a351 288 XPUSHs(sv_2mortal(newSVpv(HvNAME_get(stash), 0)));
4c6fbfb1 289 PUTBACK;
290
291 call_method("isa", G_SCALAR);
292
293 SPAGAIN;
294 ret = SvTRUE(TOPs);
295
296 FREETMPS;
297 LEAVE;
298
299 return ret;
300}
301
302STATIC bool check_sv_type (TC type, SV *sv) {
303 if (!sv)
304 return 0;
160f9ca7 305
4c6fbfb1 306 switch (type) {
307 case Any:
308 return 1;
309 break;
310 case Undef:
311 return !SvOK(sv);
312 break;
313 case Defined:
314 return SvOK(sv);
315 break;
316 case Str:
317 return (SvOK(sv) && !SvROK(sv));
160f9ca7 318 case Num:
319#if (PERL_VERSION < 8) || (PERL_VERSION == 8 && PERL_SUBVERSION <5)
320 if (!SvPOK(sv) && !SvPOKp(sv))
321 return SvFLAGS(sv) & (SVf_NOK|SVp_NOK|SVf_IOK|SVp_IOK);
322 else
323#endif
324 return looks_like_number(sv);
325 break;
326 case Int:
327 if ( SvIOK(sv) ) {
328 return 1;
329 } else if ( SvPOK(sv) ) {
0be3b17f 330 /* FIXME i really don't like this */
160f9ca7 331 int i;
332 STRLEN len;
333 char *pv = SvPV(sv, len);
334 char *end = pv + len;
0be3b17f 335 char *tail = end;
160f9ca7 336
337 errno = 0;
0be3b17f 338 i = strtol(pv, &tail, 0);
339
340 if ( errno ) return 0;
341
342 while ( tail != end ) {
343 if ( !isspace(*tail++) ) return 0;
344 }
345
346 return 1;
160f9ca7 347 }
348 return 0;
349 break;
4c6fbfb1 350 case Ref:
351 return SvROK(sv);
352 break;
353 case ScalarRef:
354 return check_is_scalar_ref(sv);
355 break;
356 case ArrayRef:
357 case HashRef:
358 case CodeRef:
359 case GlobRef:
360 return check_reftype(type, sv);
361 break;
362 case Object:
363 return sv_isobject(sv);
364 break;
160f9ca7 365 case ClassName:
7ce1a351 366 if ( SvOK(sv) && !SvROK(sv) ) {
160f9ca7 367 STRLEN len;
368 char *pv;
369 pv = SvPV(sv, len);
370 return ( gv_stashpvn(pv, len, 0) != NULL );
160f9ca7 371 }
7ce1a351 372 return 0;
373 break;
4c6fbfb1 374 case RegexpRef:
375 return sv_isa(sv, "Regexp");
376 break;
377 case FileHandle:
378 croak("todo");
379 break;
380 default:
381 croak("todo");
382 }
383
384 return 0;
385}
386
160f9ca7 387STATIC bool check_type_constraint(pTHX_ tc_kind kind, TC_CHECK tc_check, SV *type_constraint, SV *sv) {
4c6fbfb1 388 switch (kind) {
389 case tc_none:
390 return 1;
391 break;
392 case tc_type:
393 return check_sv_type(tc_check.type, sv);
394 break;
395 case tc_stash:
7ce1a351 396 return check_sv_class(aTHX_ (HV *)tc_check.sv, sv);
4c6fbfb1 397 break;
4c6fbfb1 398 case tc_fptr:
399 return tc_check.fptr(aTHX_ type_constraint, sv);
400 break;
401 case tc_cv:
402 case tc_op:
403 croak("todo");
404 break;
405 }
406
407 croak("todo");
408 return 0;
409}
410
411
160f9ca7 412STATIC void init_attr (MI *mi, ATTR *attr, AV *desc) {
413 U32 flags = 0;
1ea12c91 414 U32 hash;
415 STRLEN len;
de2f2e97 416 char *pv;
160f9ca7 417 I32 ix = av_len(desc);
418 SV **params = AvARRAY(desc);
419 SV *tc;
420 SV *key;
de2f2e97 421
422 attr->mi = mi;
423
de2f2e97 424
160f9ca7 425 if ( ix != 12 )
426 croak("wrong number of args (%d != 13)", ix + 1);
de2f2e97 427
160f9ca7 428 for ( ; ix >= 0; ix-- ) {
429 if ( !params[ix] || params[ix] == &PL_sv_undef )
430 croak("bad params");
431 }
432
433 if ( !SvROK(params[1]) || SvTYPE(SvRV(params[1])) != SVt_PVAV )
434 croak("slots is not an array");
de2f2e97 435
160f9ca7 436 if ( av_len((AV *)SvRV(params[1])) != 0 )
437 croak("Only unary slots are supported at the moment");
1ea12c91 438
160f9ca7 439 /* calculate a hash from the slot */
440 /* FIXME arrays etc should also be supported */
441 key = *av_fetch((AV *)SvRV(params[1]), 0, 0);
442 pv = SvPV(key, len);
1ea12c91 443 PERL_HASH(hash, pv, len);
1ea12c91 444
de2f2e97 445
160f9ca7 446 /* FIXME better organize these */
447 if ( SvTRUE(params[2]) )
448 flags |= ATTR_WEAK;
449
450 if ( SvTRUE(params[3]) )
451 flags |= ATTR_COERCE;
de2f2e97 452
160f9ca7 453 if ( SvTRUE(params[4]) )
454 flags |= ATTR_LAZY;
de2f2e97 455
160f9ca7 456 tc = params[5];
de2f2e97 457
160f9ca7 458 if ( SvOK(tc) ) {
459 int tc_kind = SvIV(params[6]);
460 SV *data = params[7];
461
462 switch (tc_kind) {
160f9ca7 463 case tc_type:
464 attr->tc_check.type = SvIV(data);
465 break;
7ce1a351 466 case tc_stash:
467 flags |= ATTR_TCREFCNT;
468 attr->tc_check.sv = (SV *)gv_stashsv(data, 0);
469 break;
160f9ca7 470 case tc_cv:
7ce1a351 471 flags |= ATTR_TCREFCNT;
472 attr->tc_check.sv = SvRV(data);
473 if ( SvTYPE(attr->tc_check.sv) != SVt_PVCV )
160f9ca7 474 croak("compiled type constraint is not a coderef");
475 break;
476 default:
477 croak("todo");
478 }
479
480 flags |= tc_kind;
481 }
482
483 attr->flags = flags; /* FIXME default_kind */
484
485 attr->trigger = SvROK(params[6]) ? (CV *)SvRV(params[6]) : NULL;
486 if ( attr->trigger && SvTYPE(attr->trigger) != SVt_PVCV )
487 croak("trigger is not a coderef");
488
489 attr->initializer = SvROK(params[7]) ? (CV *)SvRV(params[7]) : NULL;
490 if ( attr->initializer && SvTYPE(attr->initializer) != SVt_PVCV )
491 croak("initializer is not a coderef");
492
493 /* copy refs */
494 attr->meta_attr = newSVsv(params[0]);
495 attr->type_constraint = newSVsv(tc);
7ce1a351 496 SvREFCNT_inc(attr->trigger);
497 SvREFCNT_inc(attr->initializer);
498 if ( flags & ATTR_TCREFCNT ) SvREFCNT_inc(attr->tc_check.sv);
160f9ca7 499
500 attr->slot_sv = newSVpvn_share(pv, len, hash);
501 attr->slot_u32 = hash;
502
503 attr->def.type = 0;
de2f2e97 504
505 /* cross refs to CVs which use this struct */
506 attr->cvs = newAV();
507}
508
f253044f 509STATIC MI *new_mi (pTHX_ HV *stash, AV *attrs) {
de2f2e97 510 MI *mi;
511 I32 ix;
512 const I32 num = av_len(attrs) + 1;
513
514 Newx(mi, 1, MI);
515
516 SvREFCNT_inc_simple(stash);
517 mi->stash = stash;
518
de2f2e97 519 mi->type = 0; /* nothing else implemented yet */
520
521 /* initialize attributes */
522 mi->num_attrs = num;
523 Newx(mi->attrs, num, ATTR);
f253044f 524 for ( ix = 0; ix < num; ix++ ) {
de2f2e97 525 SV **desc = av_fetch(attrs, ix, 0);
526
160f9ca7 527 if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVAV) ) {
de2f2e97 528 croak("Attribute descriptor has to be a hash reference");
f253044f 529 }
de2f2e97 530
160f9ca7 531 init_attr(mi, &mi->attrs[ix], (AV *)SvRV(*desc));
de2f2e97 532 }
533
534 return mi;
535}
536
7ce1a351 537STATIC void delete_mi (pTHX_ MI *mi) {
538 I32 i, j;
539
540 for ( i = 0; i < mi->num_attrs; i++ ) {
541 ATTR *attr = &mi->attrs[i];
542 /* clear the pointers to this meta attr from all the CVs */
543 SV **cvs = AvARRAY(attr->cvs);
544 for ( j = av_len(attr->cvs); j >= 0; j-- ) {
545 CV *cv = cvs[j];
546 XSANY.any_i32 = 0;
547 }
548
549 SvREFCNT_dec(attr->cvs);
550 SvREFCNT_dec(attr->slot_sv);
551 SvREFCNT_dec(attr->type_constraint);
552 if ( attr->flags & ATTR_TCREFCNT ) SvREFCNT_dec(attr->tc_check.sv);
553 SvREFCNT_dec(attr->initializer);
554 SvREFCNT_dec(attr->trigger);
555 SvREFCNT_dec(attr->meta_attr);
556 }
557
558 Safefree(mi->attrs);
559 Safefree(mi);
560}
561
f253044f 562STATIC SV *new_mi_obj (pTHX_ MI *mi) {
035fd0c4 563 HV *stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
564 SV *obj = newRV_noinc(newSViv(PTR2IV(mi)));
565 sv_bless( obj, stash );
566 return obj;
f253044f 567}
de2f2e97 568
f253044f 569STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
570 dSP;
571 I32 count;
572 SV *mi;
573
574 if ( !meta_attr )
575 croak("No attr found in magic!");
576
577 ENTER;
578 SAVETMPS;
579 PUSHMARK(SP);
580 XPUSHs(meta_attr);
581 PUTBACK;
582 count = call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
583
584 if ( count != 1 )
585 croak("attr_to_meta_instance borked (%d args returned, expecting 1)", count);
586
587 SPAGAIN;
588 mi = POPs;
589
590 SvREFCNT_inc(mi);
591
592 PUTBACK;
593 FREETMPS;
594 LEAVE;
595
596 return mi;
597}
598
599STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
600 dSP;
601 I32 count;
602 MI *mi = NULL;
603 SV *class;
604 SV *attrs;
605 HV *stash;
606
607 ENTER;
608 SAVETMPS;
609 PUSHMARK(SP);
610 XPUSHs(perl_mi);
611 PUTBACK;
612 count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
613
614 if ( count != 2 )
615 croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", count);
616
617 SPAGAIN;
618 attrs = POPs;
619 class = POPs;
620
621 PUTBACK;
622
623 stash = gv_stashsv(class, 0);
624
625 mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
626
627 FREETMPS;
628 LEAVE;
629
630 return new_mi_obj(aTHX_ mi);
631}
632
633STATIC ATTR *mi_find_attr(MI *mi, SV *meta_attr) {
634 I32 ix;
635
035fd0c4 636 for ( ix = 0; ix < mi->num_attrs; ix++ ) {
f253044f 637 if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
638 return &mi->attrs[ix];
de2f2e97 639 }
de2f2e97 640 }
641
f253044f 642 sv_dump(meta_attr);
643 croak("Attr not found");
de2f2e97 644 return NULL;
645}
646
647STATIC ATTR *get_attr(pTHX_ CV *cv) {
f253044f 648 SV *meta_attr = get_stashed_in_mg(aTHX_ (SV *)cv);
649 SV *perl_mi = attr_to_meta_instance(aTHX_ meta_attr);
650 SV *c_mi = get_stashed_in_mg(aTHX_ SvRV(perl_mi));
651 MI *mi;
de2f2e97 652
f253044f 653 if (!c_mi) {
654 c_mi = perl_mi_to_c_mi(aTHX_ perl_mi);
e10d45dc 655 stash_in_mg(aTHX_ SvRV(perl_mi), c_mi);
7ce1a351 656 SvREFCNT_dec(c_mi);
f253044f 657 }
658
659 sv_2mortal(perl_mi);
660
661 mi = INT2PTR(MI *, SvIV(SvRV(c_mi)));
662
663 return mi_find_attr(mi, meta_attr);
1ea12c91 664}
665
de2f2e97 666STATIC ATTR *define_attr (pTHX_ CV *cv) {
667 ATTR *attr = get_attr(aTHX_ cv);
668 assert(attr);
669
670 XSANY.any_i32 = PTR2IV(attr);
f253044f 671
7ce1a351 672 SvREFCNT_inc(cv);
f253044f 673 av_push( attr->cvs, (SV *)cv );
de2f2e97 674
675 return attr;
676}
677
678STATIC void weaken(pTHX_ SV *sv) {
1ea12c91 679#ifdef SvWEAKREF
de2f2e97 680 sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
1ea12c91 681#else
682 croak("weak references are not implemented in this release of perl");
683#endif
684}
685
686
687/* meta instance protocol */
688
de2f2e97 689STATIC SV *get_slot_value(pTHX_ SV *self, ATTR *attr) {
1ea12c91 690 HE *he;
691
692 assert(self);
693 assert(SvROK(self));
694 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
695
de2f2e97 696 assert( ATTR_DUMB_INSTANCE(attr) );
697
698 if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
1ea12c91 699 return HeVAL(he);
700 else
701 return NULL;
702}
703
de2f2e97 704STATIC void set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
1ea12c91 705 HE *he;
4c6fbfb1 706 SV *copy;
1ea12c91 707
708 assert(self);
709 assert(SvROK(self));
710 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
711
de2f2e97 712 assert( ATTR_DUMB_INSTANCE(attr) );
713
4c6fbfb1 714 copy = newSVsv(value);
715
716 he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, copy, attr->slot_u32);
1ea12c91 717
1ea12c91 718 if (he != NULL) {
de2f2e97 719 if ( ATTR_ISWEAK(attr) )
4c6fbfb1 720 weaken(aTHX_ HeVAL(he));
1ea12c91 721 } else {
4c6fbfb1 722 SvREFCNT_dec(copy);
1ea12c91 723 croak("Hash store failed.");
724 }
725}
726
de2f2e97 727STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
1ea12c91 728 assert(self);
729 assert(SvROK(self));
730 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
731
de2f2e97 732 assert( ATTR_DUMB_INSTANCE(attr) );
733
734 return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
735}
736
737STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
738 assert(self);
739 assert(SvROK(self));
740 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
741
742 assert( ATTR_DUMB_INSTANCE(attr) );
743
744 return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
1ea12c91 745}
746
160f9ca7 747STATIC SV *getter_common(pTHX_ SV *self, ATTR *attr) {
748 assert( ATTR_DUMB_READER(attr) );
749 return get_slot_value(aTHX_ self, attr);
750}
751
752STATIC void setter_common(pTHX_ SV *self, ATTR *attr, SV *value) {
753 if ( attr->flags & ATTR_MASK_TYPE ) {
754 if ( !check_type_constraint(aTHX_ attr->flags & ATTR_MASK_TYPE, attr->tc_check, attr->type_constraint, value) )
755 croak("Bad param");
756 }
757
758 set_slot_value(aTHX_ self, attr, value);
759}
1ea12c91 760
761/* simple high level api */
762
de2f2e97 763STATIC XS(getter);
764STATIC XS(getter)
1ea12c91 765{
766#ifdef dVAR
767 dVAR;
768#endif
769 dXSARGS;
de2f2e97 770 dATTR;
1ea12c91 771 SV *value;
772
773 if (items != 1)
774 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
775
776 SP -= items;
777
160f9ca7 778 value = getter_common(aTHX_ ST(0), attr);
1ea12c91 779
780 if (value) {
781 ST(0) = sv_mortalcopy(value); /* mortalcopy because $_ .= "blah" for $foo->bar */
782 XSRETURN(1);
783 } else {
784 XSRETURN_UNDEF;
785 }
786}
787
de2f2e97 788STATIC XS(setter);
789STATIC XS(setter)
1ea12c91 790{
791#ifdef dVAR
792 dVAR;
793#endif
794 dXSARGS;
de2f2e97 795 dATTR;
1ea12c91 796
797 if (items != 2)
798 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
799
800 SP -= items;
801
160f9ca7 802 setter_common(aTHX_ ST(0), attr, ST(1));
1ea12c91 803
804 ST(0) = ST(1); /* return value */
805 XSRETURN(1);
806}
807
de2f2e97 808STATIC XS(accessor);
809STATIC XS(accessor)
1ea12c91 810{
811#ifdef dVAR
812 dVAR;
813#endif
814 dXSARGS;
de2f2e97 815 dATTR;
1ea12c91 816
817 if (items < 1)
818 Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
819
820 SP -= items;
821
822 if (items > 1) {
160f9ca7 823 setter_common(aTHX_ ST(0), attr, ST(1));
1ea12c91 824 ST(0) = ST(1); /* return value */
825 } else {
160f9ca7 826 SV *value = getter_common(aTHX_ ST(0), attr);
1ea12c91 827 if ( value ) {
828 ST(0) = value;
829 } else {
830 XSRETURN_UNDEF;
831 }
832 }
833
834 XSRETURN(1);
835}
836
837STATIC XS(predicate);
838STATIC XS(predicate)
839{
840#ifdef dVAR
841 dVAR;
842#endif
843 dXSARGS;
de2f2e97 844 dATTR;
1ea12c91 845
846 if (items != 1)
847 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
848
849 SP -= items;
850
de2f2e97 851 if ( has_slot_value(aTHX_ ST(0), attr) )
1ea12c91 852 XSRETURN_YES;
853 else
854 XSRETURN_NO;
855}
856
857enum xs_body {
de2f2e97 858 xs_body_getter = 0,
859 xs_body_setter,
860 xs_body_accessor,
1ea12c91 861 xs_body_predicate,
862 max_xs_body
863};
864
865STATIC XSPROTO ((*xs_bodies[])) = {
de2f2e97 866 getter,
867 setter,
868 accessor,
1ea12c91 869 predicate,
870};
871
872MODULE = Moose PACKAGE = Moose::XS
873
874CV *
de2f2e97 875new_sub(attr, name)
1ea12c91 876 INPUT:
de2f2e97 877 SV *attr;
878 SV *name;
1ea12c91 879 ALIAS:
de2f2e97 880 new_getter = xs_body_getter
881 new_setter = xs_body_setter
882 new_accessor = xs_body_accessor
883 new_predicate = xs_body_predicate
1ea12c91 884 PREINIT:
885 CV * cv;
886 CODE:
887 if ( ix >= max_xs_body )
888 croak("Unknown Moose::XS body type");
889
de2f2e97 890 if ( !sv_isobject(attr) )
891 croak("'attr' must be a Moose::Meta::Attribute");
892
893 cv = newXS(SvOK(name) ? SvPV_nolen(name) : NULL, xs_bodies[ix], __FILE__);
1ea12c91 894
895 if (cv == NULL)
896 croak("Oi vey!");
897
de2f2e97 898 /* associate CV with meta attr */
f253044f 899 stash_in_mg(aTHX_ (SV *)cv, attr);
de2f2e97 900
901 /* this will be set on first call */
902 XSANY.any_i32 = 0;
1ea12c91 903
904 RETVAL = cv;
905 OUTPUT:
906 RETVAL
907
908
f253044f 909MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
910
911void
912DESTROY(self)
913 INPUT:
914 SV *self;
915 PREINIT:
916 MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));
917 CODE:
7ce1a351 918 delete_mi(aTHX_ mi);
A Postmodern Object System for Perl5 - now lives at https://github.com/moose/Moose