5 #define NEED_newRV_noinc
6 #define NEED_newSVpvn_share
7 #define NEED_sv_2pv_flags
11 #define XSPROTO(name) void name(pTHX_ CV* cv)
15 #define gv_stashpvs(x, y) gv_stashpvn(STR_WITH_LEN(x), y)
19 * type constraints are already implemented by konobi
20 * should be trivial to do coercions for the core types, too
22 * TypeConstraint::Class can compare SvSTASH by ptr, and if it's neq *then*
23 * call ->isa (should handle vast majority of cases)
25 * base parametrized types are also trivial
27 * ClassName is get_stathpvn
31 * for a constructor we have ATTR *attrs, and iterate that, removing init_arg
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
37 * delegations and attribute helpers:
46 * I32 *type; // hash, array, whatever + vtable for operation
51 STATIC MGVTBL null_mg_vtbl = {
65 #endif /* MGf_LOCAL */
68 STATIC 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;
75 STATIC SV *get_stashed_in_mg(pTHX_ SV *sv) {
76 MAGIC *mg, *moremagic;
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))
90 /* this is a enum of checks */
92 Any, /* or item, or bool */
98 GlobRef, /* SVt_PVGV */
99 ArrayRef, /* SVt_PVAV */
100 HashRef, /* SVt_PVHV */
101 CodeRef, /* SVt_PVCV */
126 bool (*fptr)(pTHX_ SV *type_constraint, SV *sv);
147 /* the meta instance struct */
150 U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
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) */
156 DEFAULT def; /* cv, value or other, depending on flags */
158 TC_CHECK tc_check; /* cv, value or other, dependidng on flags */
159 SV *type_constraint; /* meta attr */
164 SV *meta_attr; /* the meta attr object */
165 AV *cvs; /* CVs which use this attr */
169 * instance reading writing
170 * 00000000 00000000 00000000 00000000
179 * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
182 #define ATTR_INSTANCE_MASK 0xff000000
183 #define ATTR_READING_MASK 0x0000ff00
184 #define ATTR_WRITING_MASK 0x000000ff
186 #define ATTR_MASK_TYPE 0x7
188 #define ATTR_MASK_DEFAULT 0x700
189 #define ATTR_SHIFT_DEAFULT 8
191 #define ATTR_LAZY 0x800
193 #define ATTR_COERCE 0x8
194 #define ATTR_TCREFCNT 0x10
195 #define ATTR_WEAK 0x20
196 #define ATTR_TRIGGER 0x40
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 )
202 #define ATTR_TYPE(f) ( attr->flags & 0x7 )
203 #define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
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 )
209 #define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
212 /* FIXME define a vtable that does call_sv */
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);
224 /* these are not yet implemented */
234 /* slot access method */
238 /* attr descriptors */
246 STATIC bool check_is_scalar_ref(SV *sv) {
248 switch (SvTYPE(SvRV(sv))) {
262 STATIC bool check_reftype(TC type, SV *sv) {
283 return SvTYPE(SvRV(sv)) == svt;
286 STATIC bool check_sv_class(pTHX_ HV *stash, SV *sv) {
299 if (SvSTASH(rv) == stash)
306 XPUSHs(sv_2mortal(newSVpv(HvNAME_get(stash), 0)));
309 call_method("isa", G_SCALAR);
320 STATIC bool check_sv_type (TC type, SV *sv) {
335 return (SvOK(sv) && !SvROK(sv));
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);
342 return looks_like_number(sv);
347 } else if ( SvPOK(sv) ) {
350 char *pv = SvPV(sv, len);
351 char *end = pv + len;
354 i = strtol(pv, &end, 0);
363 return check_is_scalar_ref(sv);
369 return check_reftype(type, sv);
372 return sv_isobject(sv);
375 if ( SvOK(sv) && !SvROK(sv) ) {
379 return ( gv_stashpvn(pv, len, 0) != NULL );
384 return sv_isa(sv, "Regexp");
396 STATIC bool check_type_constraint(pTHX_ tc_kind kind, TC_CHECK tc_check, SV *type_constraint, SV *sv) {
402 return check_sv_type(tc_check.type, sv);
405 return check_sv_class(aTHX_ (HV *)tc_check.sv, sv);
408 return tc_check.fptr(aTHX_ type_constraint, sv);
421 STATIC void init_attr (MI *mi, ATTR *attr, AV *desc) {
426 I32 ix = av_len(desc);
427 SV **params = AvARRAY(desc);
435 croak("wrong number of args (%d != 13)", ix + 1);
437 for ( ; ix >= 0; ix-- ) {
438 if ( !params[ix] || params[ix] == &PL_sv_undef )
442 if ( !SvROK(params[1]) || SvTYPE(SvRV(params[1])) != SVt_PVAV )
443 croak("slots is not an array");
445 if ( av_len((AV *)SvRV(params[1])) != 0 )
446 croak("Only unary slots are supported at the moment");
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);
452 PERL_HASH(hash, pv, len);
455 /* FIXME better organize these */
456 if ( SvTRUE(params[2]) )
459 if ( SvTRUE(params[3]) )
460 flags |= ATTR_COERCE;
462 if ( SvTRUE(params[4]) )
468 int tc_kind = SvIV(params[6]);
469 SV *data = params[7];
473 attr->tc_check.type = SvIV(data);
476 flags |= ATTR_TCREFCNT;
477 attr->tc_check.sv = (SV *)gv_stashsv(data, 0);
480 flags |= ATTR_TCREFCNT;
481 attr->tc_check.sv = SvRV(data);
482 if ( SvTYPE(attr->tc_check.sv) != SVt_PVCV )
483 croak("compiled type constraint is not a coderef");
492 attr->flags = flags; /* FIXME default_kind */
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");
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");
503 attr->meta_attr = newSVsv(params[0]);
504 attr->type_constraint = newSVsv(tc);
505 SvREFCNT_inc(attr->trigger);
506 SvREFCNT_inc(attr->initializer);
507 if ( flags & ATTR_TCREFCNT ) SvREFCNT_inc(attr->tc_check.sv);
509 attr->slot_sv = newSVpvn_share(pv, len, hash);
510 attr->slot_u32 = hash;
514 /* cross refs to CVs which use this struct */
518 STATIC MI *new_mi (pTHX_ HV *stash, AV *attrs) {
521 const I32 num = av_len(attrs) + 1;
525 SvREFCNT_inc_simple(stash);
528 mi->type = 0; /* nothing else implemented yet */
530 /* initialize attributes */
532 Newx(mi->attrs, num, ATTR);
533 for ( ix = 0; ix < num; ix++ ) {
534 SV **desc = av_fetch(attrs, ix, 0);
536 if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVAV) ) {
537 croak("Attribute descriptor has to be a hash reference");
540 init_attr(mi, &mi->attrs[ix], (AV *)SvRV(*desc));
546 STATIC void delete_mi (pTHX_ MI *mi) {
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-- ) {
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);
571 STATIC SV *new_mi_obj (pTHX_ MI *mi) {
572 HV *stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
573 SV *obj = newRV_noinc(newSViv(PTR2IV(mi)));
574 sv_bless( obj, stash );
578 STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
584 croak("No attr found in magic!");
591 count = call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
594 croak("attr_to_meta_instance borked (%d args returned, expecting 1)", count);
608 STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
621 count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
624 croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", count);
632 stash = gv_stashsv(class, 0);
634 mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
639 return new_mi_obj(aTHX_ mi);
642 STATIC ATTR *mi_find_attr(MI *mi, SV *meta_attr) {
645 for ( ix = 0; ix < mi->num_attrs; ix++ ) {
646 if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
647 return &mi->attrs[ix];
652 croak("Attr not found");
656 STATIC ATTR *get_attr(pTHX_ CV *cv) {
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));
663 c_mi = perl_mi_to_c_mi(aTHX_ perl_mi);
664 stash_in_mg(aTHX_ SvRV(perl_mi), c_mi);
670 mi = INT2PTR(MI *, SvIV(SvRV(c_mi)));
672 return mi_find_attr(mi, meta_attr);
675 STATIC ATTR *define_attr (pTHX_ CV *cv) {
676 ATTR *attr = get_attr(aTHX_ cv);
679 XSANY.any_i32 = PTR2IV(attr);
682 av_push( attr->cvs, (SV *)cv );
687 STATIC void weaken(pTHX_ SV *sv) {
689 sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
691 croak("weak references are not implemented in this release of perl");
696 /* meta instance protocol */
698 STATIC SV *get_slot_value(pTHX_ SV *self, ATTR *attr) {
703 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
705 assert( ATTR_DUMB_INSTANCE(attr) );
707 if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
713 STATIC void set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
719 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
721 assert( ATTR_DUMB_INSTANCE(attr) );
723 copy = newSVsv(value);
725 he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, copy, attr->slot_u32);
728 if ( ATTR_ISWEAK(attr) )
729 weaken(aTHX_ HeVAL(he));
732 croak("Hash store failed.");
736 STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
739 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
741 assert( ATTR_DUMB_INSTANCE(attr) );
743 return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
746 STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
749 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
751 assert( ATTR_DUMB_INSTANCE(attr) );
753 return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
756 STATIC SV *getter_common(pTHX_ SV *self, ATTR *attr) {
757 assert( ATTR_DUMB_READER(attr) );
758 return get_slot_value(aTHX_ self, attr);
761 STATIC 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) )
767 set_slot_value(aTHX_ self, attr, value);
770 /* simple high level api */
783 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
787 value = getter_common(aTHX_ ST(0), attr);
790 ST(0) = sv_mortalcopy(value); /* mortalcopy because $_ .= "blah" for $foo->bar */
807 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
811 setter_common(aTHX_ ST(0), attr, ST(1));
813 ST(0) = ST(1); /* return value */
827 Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
832 setter_common(aTHX_ ST(0), attr, ST(1));
833 ST(0) = ST(1); /* return value */
835 SV *value = getter_common(aTHX_ ST(0), attr);
846 STATIC XS(predicate);
856 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
860 if ( has_slot_value(aTHX_ ST(0), attr) )
874 STATIC XSPROTO ((*xs_bodies[])) = {
881 MODULE = Moose PACKAGE = Moose::XS
889 new_getter = xs_body_getter
890 new_setter = xs_body_setter
891 new_accessor = xs_body_accessor
892 new_predicate = xs_body_predicate
896 if ( ix >= max_xs_body )
897 croak("Unknown Moose::XS body type");
899 if ( !sv_isobject(attr) )
900 croak("'attr' must be a Moose::Meta::Attribute");
902 cv = newXS(SvOK(name) ? SvPV_nolen(name) : NULL, xs_bodies[ix], __FILE__);
907 /* associate CV with meta attr */
908 stash_in_mg(aTHX_ (SV *)cv, attr);
910 /* this will be set on first call */
918 MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
925 MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));