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 */
129 bool (*fptr)(pTHX_ SV *type_constraint, SV *sv);
150 /* the meta instance struct */
153 U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
155 /* slot access fields */
156 SV *slot_sv; /* value of the slot (slot name presumably) */
157 U32 slot_u32; /* for optimized access (precomputed hash or otherr) */
159 DEFAULT def; /* cv, value or other, depending on flags */
161 TC_CHECK tc_check; /* cv, value or other, dependidng on flags */
162 SV *type_constraint; /* meta attr */
167 SV *meta_attr; /* the meta attr object */
168 AV *cvs; /* CVs which use this attr */
172 * instance reading writing
173 * 00000000 00000000 00000000 00000000
181 * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
184 #define ATTR_INSTANCE_MASK 0xff000000
185 #define ATTR_READING_MASK 0x0000ff00
186 #define ATTR_WRITING_MASK 0x000000ff
188 #define ATTR_MASK_TYPE 0x7
190 #define ATTR_MASK_DEFAULT 0x700
191 #define ATTR_SHIFT_DEAFULT 8
193 #define ATTR_LAZY 0x800
195 #define ATTR_COERCE 0x08
196 #define ATTR_WEAK 0x10
197 #define ATTR_TRIGGER 0x10
199 #define ATTR_ISWEAK(attr) ( attr->flags & ATTR_WEAK )
200 #define ATTR_ISLAZY(attr) ( attr->flags & ATTR_LAZY )
201 #define ATTR_ISCOERCE(attr) ( attr->flags & ATTR_COERCE )
203 #define ATTR_TYPE(f) ( attr->flags & 0x7 )
204 #define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
206 #define ATTR_DUMB_READER(attr) !ATTR_IS_LAZY(attr)
207 #define ATTR_DUMB_WRITER(attr) ( ( attr->flags & ATTR_WRITING_MASK ) == 0 )
208 #define ATTR_DUMB_INSTANCE(attr) ( ( attr->flags & ATTR_INSTANCE_MASK ) == 0 )
210 #define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
213 /* FIXME define a vtable that does call_sv */
215 SV * (*get)(pTHX_ SV *self, ATTR *attr);
216 void (*set)(pTHX_ SV *self, ATTR *attr, SV *value);
217 bool * (*has)(pTHX_ SV *self, ATTR *attr);
218 SV * (*delete)(pTHX_ SV *self, ATTR *attr);
225 /* these are not yet implemented */
235 /* slot access method */
239 /* attr descriptors */
247 STATIC bool check_is_scalar_ref(SV *sv) {
249 switch (SvTYPE(SvRV(sv))) {
263 STATIC bool check_reftype(TC type, SV *sv) {
284 return SvTYPE(sv) == svt;
287 STATIC bool check_sv_class (pTHX_ HV *stash, SV *sv) {
299 if (SvSTASH(sv) == stash)
306 XPUSHs(newSVpv(HvNAME_get(SvSTASH(sv)), 0));
309 call_method("isa", G_SCALAR);
320 STATIC bool check_sv_type (TC type, SV *sv) {
334 return (SvOK(sv) && !SvROK(sv));
339 return check_is_scalar_ref(sv);
345 return check_reftype(type, sv);
348 return sv_isobject(sv);
351 return sv_isa(sv, "Regexp");
363 STATIC bool check_sv_type_constraint(pTHX_ tc_kind kind, TC_CHECK tc_check, SV *type_constraint, SV *sv) {
369 return check_sv_type(tc_check.type, sv);
372 return check_class(aTHX_ tc_check.stash, sv);
375 return ( gv_stashpv(tc_check.classname, 0) != NULL );
378 return tc_check.fptr(aTHX_ type_constraint, sv);
391 STATIC void init_attr (MI *mi, ATTR *attr, HV *desc) {
394 SV **key = hv_fetchs(desc, "key", 0);
395 SV **meta_attr = hv_fetchs(desc, "meta", 0);
398 if ( !meta_attr ) croak("'meta' is required");
400 attr->meta_attr = newSVsv(*meta_attr);
407 /* if type == hash */
408 /* prehash the key */
409 if ( !key ) croak("'key' is required");
411 pv = SvPV(*key, len);
413 PERL_HASH(hash, pv, len);
415 attr->slot_sv = newSVpvn_share(pv, len, hash);
416 attr->slot_u32 = hash;
420 attr->tc_check.type = 0;
421 attr->type_constraint = NULL;
424 attr->initializer = NULL;
425 attr->trigger = NULL;
427 /* cross refs to CVs which use this struct */
431 STATIC MI *new_mi (pTHX_ HV *stash, AV *attrs) {
434 const I32 num = av_len(attrs) + 1;
438 SvREFCNT_inc_simple(stash);
441 mi->type = 0; /* nothing else implemented yet */
443 /* initialize attributes */
445 Newx(mi->attrs, num, ATTR);
446 for ( ix = 0; ix < num; ix++ ) {
447 SV **desc = av_fetch(attrs, ix, 0);
449 if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVHV) ) {
450 croak("Attribute descriptor has to be a hash reference");
453 init_attr(mi, &mi->attrs[ix], (HV *)SvRV(*desc));
459 STATIC SV *new_mi_obj (pTHX_ MI *mi) {
460 HV *stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
461 SV *obj = newRV_noinc(newSViv(PTR2IV(mi)));
462 sv_bless( obj, stash );
466 STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
472 croak("No attr found in magic!");
479 count = call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
482 croak("attr_to_meta_instance borked (%d args returned, expecting 1)", count);
496 STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
509 count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
512 croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", count);
520 stash = gv_stashsv(class, 0);
522 mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
527 return new_mi_obj(aTHX_ mi);
530 STATIC ATTR *mi_find_attr(MI *mi, SV *meta_attr) {
533 for ( ix = 0; ix < mi->num_attrs; ix++ ) {
534 if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
535 return &mi->attrs[ix];
540 croak("Attr not found");
544 STATIC ATTR *get_attr(pTHX_ CV *cv) {
545 SV *meta_attr = get_stashed_in_mg(aTHX_ (SV *)cv);
546 SV *perl_mi = attr_to_meta_instance(aTHX_ meta_attr);
547 SV *c_mi = get_stashed_in_mg(aTHX_ SvRV(perl_mi));
551 c_mi = perl_mi_to_c_mi(aTHX_ perl_mi);
552 stash_in_mg(aTHX_ perl_mi, c_mi);
557 mi = INT2PTR(MI *, SvIV(SvRV(c_mi)));
559 return mi_find_attr(mi, meta_attr);
562 STATIC ATTR *define_attr (pTHX_ CV *cv) {
563 ATTR *attr = get_attr(aTHX_ cv);
566 XSANY.any_i32 = PTR2IV(attr);
568 av_push( attr->cvs, (SV *)cv );
573 STATIC void weaken(pTHX_ SV *sv) {
575 sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
577 croak("weak references are not implemented in this release of perl");
582 /* meta instance protocol */
584 STATIC SV *get_slot_value(pTHX_ SV *self, ATTR *attr) {
589 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
591 assert( ATTR_DUMB_INSTANCE(attr) );
593 if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
599 STATIC void set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
605 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
607 assert( ATTR_DUMB_INSTANCE(attr) );
609 copy = newSVsv(value);
611 he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, copy, attr->slot_u32);
614 if ( ATTR_ISWEAK(attr) )
615 weaken(aTHX_ HeVAL(he));
618 croak("Hash store failed.");
622 STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
625 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
627 assert( ATTR_DUMB_INSTANCE(attr) );
629 return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
632 STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
635 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
637 assert( ATTR_DUMB_INSTANCE(attr) );
639 return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
643 /* simple high level api */
656 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
660 assert( ATTR_DUMB_READER(attr) );
662 value = get_slot_value(aTHX_ ST(0), attr);
665 ST(0) = sv_mortalcopy(value); /* mortalcopy because $_ .= "blah" for $foo->bar */
682 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
686 assert( ATTR_DUMB_WRITER(attr) );
688 set_slot_value(aTHX_ ST(0), attr, ST(1));
690 ST(0) = ST(1); /* return value */
704 Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
709 assert( ATTR_DUMB_READER(attr) );
710 set_slot_value(aTHX_ ST(0), attr, ST(1));
711 ST(0) = ST(1); /* return value */
714 assert( ATTR_DUMB_WRITER(attr) );
715 value = get_slot_value(aTHX_ ST(0), attr);
726 STATIC XS(predicate);
736 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
740 if ( has_slot_value(aTHX_ ST(0), attr) )
754 STATIC XSPROTO ((*xs_bodies[])) = {
761 MODULE = Moose PACKAGE = Moose::XS
769 new_getter = xs_body_getter
770 new_setter = xs_body_setter
771 new_accessor = xs_body_accessor
772 new_predicate = xs_body_predicate
776 if ( ix >= max_xs_body )
777 croak("Unknown Moose::XS body type");
779 if ( !sv_isobject(attr) )
780 croak("'attr' must be a Moose::Meta::Attribute");
782 cv = newXS(SvOK(name) ? SvPV_nolen(name) : NULL, xs_bodies[ix], __FILE__);
787 /* associate CV with meta attr */
788 stash_in_mg(aTHX_ (SV *)cv, attr);
790 /* this will be set on first call */
798 MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
805 MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));
807 /* foreach attr ( delete cvs XSANY ), free attrs free mi */