-
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
+
+#define NEED_newRV_noinc
+#define NEED_newSVpvn_share
+#define NEED_sv_2pv_flags
#include "ppport.h"
-static bool ck_sv_defined(SV*);
-static bool ck_sv_is_ref(SV*);
-static bool ck_sv_ref_type(SV*, int);
-
-static bool
-ck_sv_defined(SV* value){
- return SvOK(value) ? 1 : 0;
-}
-
-static bool
-ck_sv_is_ref(SV* value){
- bool retval = 0;
- if( ck_sv_defined(value) && SvROK(value) ){
- retval = 1;
- }
- return retval;
-}
-
-static bool
-ck_sv_ref_type(SV* value, int sv_type){
- bool retval = 0;
- if( ck_sv_is_ref(value) && SvTYPE( SvRV(value) ) == sv_type){
- retval = 1;
- }
- return retval;
-}
-
-static const char *regclass = "Regexp";
-
-MODULE = Moose PACKAGE = Moose::Util::TypeConstraints::OptimizedConstraints
-PROTOTYPES: ENABLE
-
-bool
-Undef(value)
- SV* value
- CODE:
- RETVAL = !ck_sv_defined(value);
- OUTPUT:
- RETVAL
-
-bool
-Defined(value)
- SV* value
- CODE:
- RETVAL = ck_sv_defined(value);
- OUTPUT:
- RETVAL
-
-bool
-Value(value)
- SV* value
- CODE:
- RETVAL = (ck_sv_defined(value) && !ck_sv_is_ref(value)) ? 1 : 0;
- OUTPUT:
- RETVAL
-
-bool
-Str(value)
- SV* value
- CODE:
- RETVAL = (ck_sv_defined(value) && !ck_sv_is_ref(value)) ? 1 : 0;
- OUTPUT:
- RETVAL
-
-bool
-Ref(value)
- SV* value
- CODE:
- RETVAL = ck_sv_is_ref(value);
- OUTPUT:
- RETVAL
-
-bool
-ScalarRef(value)
- SV* value
- CODE:
- RETVAL = 0;
- if(
- SvOK(value) && SvROK(value)
- ){
- int type = SvTYPE(SvRV(value));
- if(
- type == SVt_IV ||
- type == SVt_NV ||
- type == SVt_PV ||
- type == SVt_NULL
- ){
- RETVAL = 1;
- }
+#ifndef XSPROTO
+#define XSPROTO(name) void name(pTHX_ CV* cv)
+#endif
+
+#ifndef gv_stashpvs
+#define gv_stashpvs(x, y) gv_stashpvn(STR_WITH_LEN(x), y)
+#endif
+
+/* FIXME
+ * needs to be made into Moose::XS::Meta::Instance and Meta::Slot for the
+ * metadata, with a proper destructor. XSANY still points to this struct, but
+ * it is shared by all functions of the same type.
+ *
+ * Instance contains SvSTASH, and ATTR slots[]
+ *
+ * On recreation of the meta instance we refresh the ATTR value of all the CVs
+ * we installed
+ *
+ * need a good way to handle time between invalidate and regeneration (just
+ * check XSANY and call get_meta_instance if null?)
+ */
+
+/* FIXME
+ * type constraints are already implemented by konobi
+ * should be trivial to do coercions for the core types, too
+ *
+ * TypeConstraint::Class can compare SvSTASH by ptr, and if it's neq *then*
+ * call ->isa (should handle vast majority of cases)
+ *
+ * base parametrized types are also trivial
+ *
+ * ClassName is get_stathpvn
+ */
+
+/* FIXME
+ * for a constructor we have ATTR *attrs, and iterate that, removing init_arg
+ * we can preallocate the structure to the right size (maybe even with the
+ * right HEs?), and do various other prehashing hacks to gain speed
+ * */
+
+/* FIXME
+ * delegations and attribute helpers:
+ *
+ * typedef struct {
+ * ATTR *attr;
+ * pv *method;
+ * } delegation;
+ *
+ * typedef struct {
+ * ATTR *attr;
+ * I32 *type; // hash, array, whatever + vtable for operation
+ * } attributehelper;
+ */
+
+
+STATIC MGVTBL null_mg_vtbl = {
+ NULL, /* get */
+ NULL, /* set */
+ NULL, /* len */
+ NULL, /* clear */
+ NULL, /* free */
+#if MGf_COPY
+ NULL, /* copy */
+#endif /* MGf_COPY */
+#if MGf_DUP
+ NULL, /* dup */
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ NULL, /* local */
+#endif /* MGf_LOCAL */
+};
+
+STATIC MAGIC *stash_in_mg (pTHX_ SV *sv, SV *obj) {
+ MAGIC *mg = sv_magicext(sv, obj, PERL_MAGIC_ext, &null_mg_vtbl, NULL, 0 );
+ mg->mg_flags |= MGf_REFCOUNTED;
+
+ return mg;
+}
+
+STATIC SV *get_stashed_in_mg(pTHX_ SV *sv) {
+ MAGIC *mg, *moremagic;
+
+ if (SvTYPE(sv) >= SVt_PVMG) {
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_virtual == &null_mg_vtbl))
+ break;
+ }
+ if (mg)
+ return mg->mg_obj;
}
- OUTPUT:
- RETVAL
-
-bool
-ArrayRef(value)
- SV* value
- CODE:
- RETVAL = ck_sv_ref_type(value, SVt_PVAV);
- OUTPUT:
- RETVAL
-
-bool
-HashRef(value)
- SV* value
- CODE:
- RETVAL = (ck_sv_ref_type(value, SVt_PVHV) && !sv_isobject(value)) ? 1 : 0;
- OUTPUT:
- RETVAL
-
-bool
-CodeRef(value)
- SV* value
- CODE:
- RETVAL = ck_sv_ref_type(value, SVt_PVCV);
- OUTPUT:
- RETVAL
-
-bool
-GlobRef(value)
- SV* value
- CODE:
- RETVAL = ck_sv_ref_type(value, SVt_PVGV);
- OUTPUT:
- RETVAL
-
-bool
-Object(value)
- SV* value
- CODE:
- RETVAL = 0;
- if( ck_sv_is_ref(value)
- && sv_isobject(value)
- && !sv_isa(value, regclass)
- ){
- RETVAL = 1;
+
+ return NULL;
+}
+
+
+typedef enum {
+ Any = 0,
+ Item,
+ Bool,
+ Maybe, /* [`a] */
+ Undef,
+ Defined,
+ Value,
+ Num,
+ Int,
+ Str,
+ ClassName,
+ Ref,
+ ScalarRef,
+ ArrayRef, /* [`a] */
+ HashRef, /* [`a] */
+ CodeRef,
+ RegexpRef,
+ GlobRef,
+ FileHandle,
+ Object,
+ Role,
+
+ /* XS only types */
+ Class,
+
+ max_TC
+} TC;
+
+typedef union {
+ TC type;
+ CV *cv;
+ HV *stash;
+ OP *op;
+} TC_CHECK;
+
+typedef enum {
+ tc_none = 0,
+ tc_type,
+ tc_cv,
+ tc_stash,
+ tc_op,
+} tc_kind;
+
+typedef union {
+ char *builder;
+ SV *value;
+ CV *sub;
+ OP *op;
+ U32 type;
+} DEFAULT;
+
+typedef enum {
+ default_none = 0,
+ default_type,
+ default_builder,
+ default_value,
+ default_sub,
+ default_op,
+} default_kind;
+
+typedef struct {
+ /* the meta instance struct */
+ struct mi *mi;
+
+ U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
+
+ /* slot access fields */
+ SV *slot_sv; /* value of the slot (slot name presumably) */
+ U32 slot_u32; /* for optimized access (precomputed hash or otherr) */
+
+ DEFAULT def; /* cv, value or other, depending on flags */
+
+ TC_CHECK tc_check; /* cv, value or other, dependidng on flags */
+ SV *type_constraint; /* meta attr */
+
+ CV *initializer;
+ CV *trigger;
+
+ SV *meta_attr; /* the meta attr object */
+ AV *cvs; /* CVs which use this attr */
+} ATTR;
+
+/* slot flags:
+ * instance reading writing
+ * 00000000 00000000 00000000 00000000
+ * ^ trigger
+ * ^ weak
+ * ^^^ tc_kind
+ * ^ coerce
+ * ^^^ default_kind
+ * ^ lazy
+ * ^ required
+ * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
+ */
+
+#define ATTR_INSTANCE_MASK 0xff000000
+#define ATTR_READING_MASK 0x0000ff00
+#define ATTR_WRITING_MASK 0x000000ff
+
+#define ATTR_MASK_TYPE 0x7
+
+#define ATTR_MASK_DEFAULT 0x700
+#define ATTR_SHIFT_DEAFULT 8
+
+#define ATTR_LAZY 0x800
+
+#define ATTR_COERCE 0x08
+#define ATTR_WEAK 0x10
+#define ATTR_TRIGGER 0x10
+
+#define ATTR_ISWEAK(attr) ( attr->flags & ATTR_WEAK )
+#define ATTR_ISLAZY(attr) ( attr->flags & ATTR_LAZY )
+#define ATTR_ISCOERCE(attr) ( attr->flags & ATTR_COERCE )
+
+#define ATTR_TYPE(f) ( attr->flags & 0x7 )
+#define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
+
+#define ATTR_DUMB_READER(attr) !ATTR_IS_LAZY(attr)
+#define ATTR_DUMB_WRITER(attr) ( ( attr->flags & ATTR_WRITING_MASK ) == 0 )
+#define ATTR_DUMB_INSTANCE(attr) ( ( attr->flags & ATTR_INSTANCE_MASK ) == 0 )
+
+#define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
+
+
+/* FIXME define a vtable that does call_sv */
+typedef struct {
+ SV * (*get)(pTHX_ SV *self, ATTR *attr);
+ void (*set)(pTHX_ SV *self, ATTR *attr, SV *value);
+ bool * (*has)(pTHX_ SV *self, ATTR *attr);
+ SV * (*delete)(pTHX_ SV *self, ATTR *attr);
+} instance_vtbl;
+
+
+typedef enum {
+ hash = 0,
+
+ /* these are not yet implemented */
+ array,
+ fptr,
+ cv,
+ judy,
+} instance_types;
+
+typedef struct mi {
+ HV *stash;
+
+ /* slot access method */
+ instance_types type;
+ instance_vtbl *vtbl;
+
+ /* attr descriptors */
+ I32 num_attrs;
+ ATTR *attrs;
+} MI;
+
+
+STATIC void init_attr (MI *mi, ATTR *attr, HV *desc) {
+ U32 hash;
+ STRLEN len;
+ SV **key = hv_fetchs(desc, "key", 0);
+ SV **meta_attr = hv_fetchs(desc, "meta", 0);
+ char *pv;
+
+ if ( !meta_attr ) croak("'meta' is required");
+
+ attr->meta_attr = newSVsv(*meta_attr);
+
+ attr->mi = mi;
+
+ attr->flags = 0;
+
+
+ /* if type == hash */
+ /* prehash the key */
+ if ( !key ) croak("'key' is required");
+
+ pv = SvPV(*key, len);
+
+ PERL_HASH(hash, pv, len);
+
+ attr->slot_sv = newSVpvn_share(pv, len, hash);
+ attr->slot_u32 = hash;
+
+ attr->def.type = 0;
+
+ attr->tc_check.type = 0;
+ attr->type_constraint = NULL;
+
+
+ attr->initializer = NULL;
+ attr->trigger = NULL;
+
+ /* cross refs to CVs which use this struct */
+ attr->cvs = newAV();
+}
+
+STATIC MI *new_mi (pTHX_ HV *stash, AV *attrs) {
+ MI *mi;
+ I32 ix;
+ const I32 num = av_len(attrs) + 1;
+
+ Newx(mi, 1, MI);
+
+ SvREFCNT_inc_simple(stash);
+ mi->stash = stash;
+
+ mi->type = 0; /* nothing else implemented yet */
+
+ /* initialize attributes */
+ mi->num_attrs = num;
+ Newx(mi->attrs, num, ATTR);
+ for ( ix = 0; ix < num; ix++ ) {
+ SV **desc = av_fetch(attrs, ix, 0);
+
+ if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVHV) ) {
+ croak("Attribute descriptor has to be a hash reference");
+ }
+
+ init_attr(mi, &mi->attrs[ix], (HV *)SvRV(*desc));
}
- OUTPUT:
- RETVAL
-
-bool
-ObjectOfType(value, class)
- SV* value
- SV* class
- PREINIT:
- const char* classname;
- CODE:
- RETVAL = 0;
-
- classname = SvPV_nolen(class);
- if(!classname){
- RETVAL = 0;
+
+ return mi;
+}
+
+STATIC SV *new_mi_obj (pTHX_ MI *mi) {
+ HV *stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
+ SV *obj = newRV_noinc(newSViv(PTR2IV(mi)));
+ sv_bless( obj, stash );
+ return obj;
+}
+
+STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
+ dSP;
+ I32 count;
+ SV *mi;
+
+ if ( !meta_attr )
+ croak("No attr found in magic!");
+
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(SP);
+ XPUSHs(meta_attr);
+ PUTBACK;
+ count = call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
+
+ if ( count != 1 )
+ croak("attr_to_meta_instance borked (%d args returned, expecting 1)", count);
+
+ SPAGAIN;
+ mi = POPs;
+
+ SvREFCNT_inc(mi);
+
+ PUTBACK;
+ FREETMPS;
+ LEAVE;
+
+ return mi;
+}
+
+STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
+ dSP;
+ I32 count;
+ MI *mi = NULL;
+ SV *class;
+ SV *attrs;
+ HV *stash;
+
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(SP);
+ XPUSHs(perl_mi);
+ PUTBACK;
+ count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
+
+ if ( count != 2 )
+ croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", count);
+
+ SPAGAIN;
+ attrs = POPs;
+ class = POPs;
+
+ PUTBACK;
+
+ stash = gv_stashsv(class, 0);
+
+ mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
+
+ FREETMPS;
+ LEAVE;
+
+ return new_mi_obj(aTHX_ mi);
+}
+
+STATIC ATTR *mi_find_attr(MI *mi, SV *meta_attr) {
+ I32 ix;
+
+ for ( ix = 0; ix < mi->num_attrs; ix++ ) {
+ if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
+ return &mi->attrs[ix];
+ }
}
- if( ck_sv_is_ref(value)
- && sv_isobject(value)
- && sv_derived_from(value, classname)
- ){
- RETVAL = 1;
+ sv_dump(meta_attr);
+ croak("Attr not found");
+ return NULL;
+}
+
+STATIC ATTR *get_attr(pTHX_ CV *cv) {
+ SV *meta_attr = get_stashed_in_mg(aTHX_ (SV *)cv);
+ SV *perl_mi = attr_to_meta_instance(aTHX_ meta_attr);
+ SV *c_mi = get_stashed_in_mg(aTHX_ SvRV(perl_mi));
+ MI *mi;
+
+ if (!c_mi) {
+ c_mi = perl_mi_to_c_mi(aTHX_ perl_mi);
+ stash_in_mg(aTHX_ perl_mi, c_mi);
+ }
+
+ sv_2mortal(perl_mi);
+
+ mi = INT2PTR(MI *, SvIV(SvRV(c_mi)));
+
+ return mi_find_attr(mi, meta_attr);
+}
+
+STATIC ATTR *define_attr (pTHX_ CV *cv) {
+ ATTR *attr = get_attr(aTHX_ cv);
+ assert(attr);
+
+ XSANY.any_i32 = PTR2IV(attr);
+
+ av_push( attr->cvs, (SV *)cv );
+
+ return attr;
+}
+
+STATIC void weaken(pTHX_ SV *sv) {
+#ifdef SvWEAKREF
+ sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
+#else
+ croak("weak references are not implemented in this release of perl");
+#endif
+}
+
+
+/* meta instance protocol */
+
+STATIC SV *get_slot_value(pTHX_ SV *self, ATTR *attr) {
+ HE *he;
+
+ assert(self);
+ assert(SvROK(self));
+ assert(SvTYPE(SvRV(self)) == SVt_PVHV);
+
+ assert( ATTR_DUMB_INSTANCE(attr) );
+
+ if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
+ return HeVAL(he);
+ else
+ return NULL;
+}
+
+STATIC void set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
+ HE *he;
+
+ assert(self);
+ assert(SvROK(self));
+ assert(SvTYPE(SvRV(self)) == SVt_PVHV);
+
+ assert( ATTR_DUMB_INSTANCE(attr) );
+
+ SvREFCNT_inc(value);
+
+ he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, value, attr->slot_u32);
+ if (he != NULL) {
+ if ( ATTR_ISWEAK(attr) )
+ weaken(aTHX_ HeVAL(he)); /* actually only needed once at HE creation time */
+ } else {
+ croak("Hash store failed.");
+ }
+}
+
+STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
+ assert(self);
+ assert(SvROK(self));
+ assert(SvTYPE(SvRV(self)) == SVt_PVHV);
+
+ assert( ATTR_DUMB_INSTANCE(attr) );
+
+ return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
+}
+
+STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
+ assert(self);
+ assert(SvROK(self));
+ assert(SvTYPE(SvRV(self)) == SVt_PVHV);
+
+ assert( ATTR_DUMB_INSTANCE(attr) );
+
+ return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
+}
+
+
+/* simple high level api */
+
+STATIC XS(getter);
+STATIC XS(getter)
+{
+#ifdef dVAR
+ dVAR;
+#endif
+ dXSARGS;
+ dATTR;
+ SV *value;
+
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
+
+ SP -= items;
+
+ assert( ATTR_DUMB_READER(attr) );
+
+ value = get_slot_value(aTHX_ ST(0), attr);
+
+ if (value) {
+ ST(0) = sv_mortalcopy(value); /* mortalcopy because $_ .= "blah" for $foo->bar */
+ XSRETURN(1);
+ } else {
+ XSRETURN_UNDEF;
}
- OUTPUT:
- RETVAL
-
-bool
-RegexpRef(value)
- SV* value
- CODE:
- RETVAL = 0;
- if( ck_sv_is_ref(value)
- && sv_isobject(value)
- && sv_isa(value, regclass)
- ){
- RETVAL = 1;
+}
+
+STATIC XS(setter);
+STATIC XS(setter)
+{
+#ifdef dVAR
+ dVAR;
+#endif
+ dXSARGS;
+ dATTR;
+
+ if (items != 2)
+ Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
+
+ SP -= items;
+
+ assert( ATTR_DUMB_WRITER(attr) );
+
+ set_slot_value(aTHX_ ST(0), attr, ST(1));
+
+ ST(0) = ST(1); /* return value */
+ XSRETURN(1);
+}
+
+STATIC XS(accessor);
+STATIC XS(accessor)
+{
+#ifdef dVAR
+ dVAR;
+#endif
+ dXSARGS;
+ dATTR;
+
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
+
+ SP -= items;
+
+ if (items > 1) {
+ assert( ATTR_DUMB_READER(attr) );
+ set_slot_value(aTHX_ ST(0), attr, ST(1));
+ ST(0) = ST(1); /* return value */
+ } else {
+ SV *value;
+ assert( ATTR_DUMB_WRITER(attr) );
+ value = get_slot_value(aTHX_ ST(0), attr);
+ if ( value ) {
+ ST(0) = value;
+ } else {
+ XSRETURN_UNDEF;
+ }
}
- OUTPUT:
- RETVAL
+ XSRETURN(1);
+}
+
+STATIC XS(predicate);
+STATIC XS(predicate)
+{
+#ifdef dVAR
+ dVAR;
+#endif
+ dXSARGS;
+ dATTR;
+
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
+
+ SP -= items;
+
+ if ( has_slot_value(aTHX_ ST(0), attr) )
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+}
+
+enum xs_body {
+ xs_body_getter = 0,
+ xs_body_setter,
+ xs_body_accessor,
+ xs_body_predicate,
+ max_xs_body
+};
+
+STATIC XSPROTO ((*xs_bodies[])) = {
+ getter,
+ setter,
+ accessor,
+ predicate,
+};
+
+MODULE = Moose PACKAGE = Moose::XS
+
+CV *
+new_sub(attr, name)
+ INPUT:
+ SV *attr;
+ SV *name;
+ ALIAS:
+ new_getter = xs_body_getter
+ new_setter = xs_body_setter
+ new_accessor = xs_body_accessor
+ new_predicate = xs_body_predicate
+ PREINIT:
+ CV * cv;
+ CODE:
+ if ( ix >= max_xs_body )
+ croak("Unknown Moose::XS body type");
+
+ if ( !sv_isobject(attr) )
+ croak("'attr' must be a Moose::Meta::Attribute");
+
+ cv = newXS(SvOK(name) ? SvPV_nolen(name) : NULL, xs_bodies[ix], __FILE__);
+
+ if (cv == NULL)
+ croak("Oi vey!");
+
+ /* associate CV with meta attr */
+ stash_in_mg(aTHX_ (SV *)cv, attr);
+
+ /* this will be set on first call */
+ XSANY.any_i32 = 0;
+
+ RETVAL = cv;
+ OUTPUT:
+ RETVAL
+
+
+MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
+void
+DESTROY(self)
+ INPUT:
+ SV *self;
+ PREINIT:
+ MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));
+ CODE:
+ /* foreach attr ( delete cvs XSANY ), free attrs free mi */
projects / gitmo/Moose.git / blobdiff