+/* There's a lot of cases of doubled parens in here like this:
+
+ while ( (he = ...) ) {
+
+This shuts up warnings from gcc -Wall
+*/
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
+
+#define NEED_newRV_noinc
+#define NEED_sv_2pv_flags
+#define NEED_sv_2pv_nolen
#include "ppport.h"
-/*
-check_method_cache_flag:
- check the PL_sub_generation
- ISA/method cache thing
+#define DECLARE_KEY(name) SV *key_##name; U32 hash_##name;
+
+#define PREHASH_KEY_WITH_VALUE(name, value) do { \
+ key_##name = newSVpvs(value); \
+ PERL_HASH(hash_##name, value, sizeof(value) - 1); \
+} while (0)
+
+/* this is basically the same as the above macro, except that the value will be
+ * the stringified name. However, we can't just implement this in terms of
+ * PREHASH_KEY_WITH_VALUE as that'd cause macro expansion on the value of
+ * 'name' when it's being passed to the other macro. suggestions on how to make
+ * this more elegant would be much appreciated */
+
+#define PREHASH_KEY(name) do { \
+ key_##name = newSVpvs(#name); \
+ PERL_HASH(hash_##name, #name, sizeof(#name) - 1); \
+} while (0)
+
+DECLARE_KEY(name);
+DECLARE_KEY(package);
+DECLARE_KEY(package_name);
+DECLARE_KEY(body);
+DECLARE_KEY(package_cache_flag);
+DECLARE_KEY(methods);
+DECLARE_KEY(VERSION);
+DECLARE_KEY(ISA);
+
+SV *method_metaclass;
+SV *associated_metaclass;
+SV *wrap;
+
+
+#define check_package_cache_flag(stash) mop_check_package_cache_flag(aTHX_ stash)
+#if PERL_VERSION >= 10
+
+static UV
+mop_check_package_cache_flag(pTHX_ HV* stash) {
+ assert(SvTYPE(stash) == SVt_PVHV);
+
+ /* here we're trying to implement a c version of mro::get_pkg_gen($stash),
+ * however the perl core doesn't make it easy for us. It doesn't provide an
+ * api that just does what we want.
+ *
+ * However, we know that the information we want is, inside the core,
+ * available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the
+ * HvMROMETA macro is public, it is implemented using Perl_mro_meta_init,
+ * which is not public and only available inside the core, as the mro
+ * interface as well as the structure returned by mro_meta_init isn't
+ * considered to be stable yet.
+ *
+ * Perl_mro_meta_init isn't declared static, so we could just define it
+ * ourselfs if perls headers don't do that for us, except that won't work
+ * on platforms where symbols need to be explicitly exported when linking
+ * shared libraries.
+ *
+ * So our, hopefully temporary, solution is to be even more evil and
+ * basically reimplement HvMROMETA in a very fragile way that'll blow up
+ * when the relevant parts of the mro implementation in core change.
+ *
+ * :-(
+ *
+ */
+
+ return HvAUX(stash)->xhv_mro_meta
+ ? HvAUX(stash)->xhv_mro_meta->pkg_gen
+ : 0;
+}
+
+#else /* pre 5.10.0 */
+
+static UV
+mop_check_package_cache_flag(pTHX_ HV *stash) {
+ PERL_UNUSED_ARG(stash);
+ assert(SvTYPE(stash) == SVt_PVHV);
+
+ return PL_sub_generation;
+}
+#endif
+
+#define call0(s, m) mop_call0(aTHX_ s, m)
+static SV *
+mop_call0(pTHX_ SV *const self, SV *const method) {
+ dSP;
+ SV *ret;
+
+ PUSHMARK(SP);
+ XPUSHs(self);
+ PUTBACK;
+
+ call_sv(method, G_SCALAR | G_METHOD);
+
+ SPAGAIN;
+ ret = POPs;
+ PUTBACK;
+
+ return ret;
+}
+
+static int
+get_code_info (SV *coderef, char **pkg, char **name)
+{
+ if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) {
+ return 0;
+ }
+
+ coderef = SvRV(coderef);
+ /* I think this only gets triggered with a mangled coderef, but if
+ we hit it without the guard, we segfault. The slightly odd return
+ value strikes me as an improvement (mst)
+ */
+#ifdef isGV_with_GP
+ if ( isGV_with_GP(CvGV(coderef)) ) {
+#endif
+ *pkg = HvNAME( GvSTASH(CvGV(coderef)) );
+ *name = GvNAME( CvGV(coderef) );
+#ifdef isGV_with_GP
+ } else {
+ *pkg = "__UNKNOWN__";
+ *name = "__ANON__";
+ }
+#endif
+
+ return 1;
+}
+
+typedef enum {
+ TYPE_FILTER_NONE,
+ TYPE_FILTER_CODE,
+ TYPE_FILTER_ARRAY,
+ TYPE_FILTER_IO,
+ TYPE_FILTER_HASH,
+ TYPE_FILTER_SCALAR,
+} type_filter_t;
+
+static HV *
+get_all_package_symbols(HV *stash, type_filter_t filter)
+{
+ HE *he;
+ HV *ret = newHV();
+
+ (void)hv_iterinit(stash);
+
+ if (filter == TYPE_FILTER_NONE) {
+ while ( (he = hv_iternext(stash)) ) {
+ STRLEN keylen;
+ char *key = HePV(he, keylen);
+ if (!hv_store(ret, key, keylen, SvREFCNT_inc(HeVAL(he)), 0)) {
+ croak("failed to store glob ref");
+ }
+ }
+
+ return ret;
+ }
+
+ while ( (he = hv_iternext(stash)) ) {
+ SV *const gv = HeVAL(he);
+ SV *sv = NULL;
+ char *key;
+ STRLEN keylen;
+ char *package;
+ SV *fq;
+
+ switch( SvTYPE(gv) ) {
+#ifndef SVt_RV
+ case SVt_RV:
+#endif
+ case SVt_PV:
+ case SVt_IV:
+ /* expand the gv into a real typeglob if it
+ * contains stub functions and we were asked to
+ * return CODE symbols */
+ if (filter == TYPE_FILTER_CODE) {
+ if (SvROK(gv)) {
+ /* we don't really care about the length,
+ but that's the API */
+ key = HePV(he, keylen);
+ package = HvNAME(stash);
+ fq = newSVpvf("%s::%s", package, key);
+ sv = (SV *)get_cv(SvPV_nolen(fq), 0);
+ break;
+ }
+
+ key = HePV(he, keylen);
+ gv_init((GV *)gv, stash, key, keylen, GV_ADDMULTI);
+ }
+ /* fall through */
+ case SVt_PVGV:
+ switch (filter) {
+ case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break;
+ case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break;
+ case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break;
+ case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break;
+ case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break;
+ default:
+ croak("Unknown type");
+ }
+ break;
+ default:
+ continue;
+ }
+
+ if (sv) {
+ char *key = HePV(he, keylen);
+ if (!hv_store(ret, key, keylen, newRV_inc(sv), 0)) {
+ croak("failed to store symbol ref");
+ }
+ }
+ }
+
+ return ret;
+}
+
+
+static void
+mop_update_method_map(pTHX_ SV *const self, SV *const class_name, HV *const stash, HV *const map) {
+ const char *const class_name_pv = HvNAME(stash); /* must be HvNAME(stash), not SvPV_nolen_const(class_name) */
+ SV *method_metaclass_name;
+ char *method_name;
+ I32 method_name_len;
+ SV *coderef;
+ HV *symbols;
+ dSP;
+
+ symbols = get_all_package_symbols(stash, TYPE_FILTER_CODE);
+
+ (void)hv_iterinit(symbols);
+ while ( (coderef = hv_iternextsv(symbols, &method_name, &method_name_len)) ) {
+ CV *cv = (CV *)SvRV(coderef);
+ char *cvpkg_name;
+ char *cv_name;
+ SV *method_slot;
+ SV *method_object;
+
+ if (!get_code_info(coderef, &cvpkg_name, &cv_name)) {
+ continue;
+ }
+
+ /* this checks to see that the subroutine is actually from our package */
+ if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) {
+ if ( strNE(cvpkg_name, class_name_pv) ) {
+ continue;
+ }
+ }
+
+ method_slot = *hv_fetch(map, method_name, method_name_len, TRUE);
+ if ( SvOK(method_slot) ) {
+ SV *const body = call0(method_slot, key_body); /* $method_object->body() */
+ if ( SvROK(body) && ((CV *) SvRV(body)) == cv ) {
+ continue;
+ }
+ }
+
+ method_metaclass_name = call0(self, method_metaclass); /* $self->method_metaclass() */
+
+ /*
+ $method_object = $method_metaclass->wrap(
+ $cv,
+ associated_metaclass => $self,
+ package_name => $class_name,
+ name => $method_name
+ );
+ */
+ ENTER;
+ SAVETMPS;
+
+ PUSHMARK(SP);
+ EXTEND(SP, 8);
+ PUSHs(method_metaclass_name); /* invocant */
+ mPUSHs(newRV_inc((SV *)cv));
+ PUSHs(associated_metaclass);
+ PUSHs(self);
+ PUSHs(key_package_name);
+ PUSHs(class_name);
+ PUSHs(key_name);
+ mPUSHs(newSVpv(method_name, method_name_len));
+ PUTBACK;
+ call_sv(wrap, G_SCALAR | G_METHOD);
+ SPAGAIN;
+ method_object = POPs;
+ PUTBACK;
+ /* $map->{$method_name} = $method_object */
+ sv_setsv(method_slot, method_object);
+
+ FREETMPS;
+ LEAVE;
+ }
+}
+
+/*
get_code_info:
Pass in a coderef, returns:
[ $pkg_name, $coderef_name ] ie:
MODULE = Class::MOP PACKAGE = Class::MOP
-SV*
-check_package_cache_flag(pkg)
- SV* pkg
- CODE:
- RETVAL = newSViv(PL_sub_generation);
- OUTPUT:
- RETVAL
+BOOT:
+ PREHASH_KEY(name);
+ PREHASH_KEY(body);
+ PREHASH_KEY(package);
+ PREHASH_KEY(package_name);
+ PREHASH_KEY(methods);
+ PREHASH_KEY(ISA);
+ PREHASH_KEY(VERSION);
+ PREHASH_KEY_WITH_VALUE(package_cache_flag, "_package_cache_flag");
+
+ method_metaclass = newSVpvs("method_metaclass");
+ wrap = newSVpvs("wrap");
+ associated_metaclass = newSVpvs("associated_metaclass");
+
+
+PROTOTYPES: DISABLE
+# use prototype here to be compatible with get_code_info from Sub::Identify
void
get_code_info(coderef)
- SV* coderef
- PREINIT:
- char* name;
- char* pkg;
- PPCODE:
-
- if( SvOK(coderef) && SvROK(coderef) && SvTYPE(SvRV(coderef)) == SVt_PVCV){
- coderef = SvRV(coderef);
- name = GvNAME( CvGV(coderef) );
- pkg = HvNAME( GvSTASH(CvGV(coderef)) );
-
- EXTEND(SP, 2);
- PUSHs(newSVpvn(pkg, strlen(pkg)));
- PUSHs(newSVpvn(name, strlen(name)));
- }
+ SV *coderef
+ PROTOTYPE: $
+ PREINIT:
+ char *pkg = NULL;
+ char *name = NULL;
+ PPCODE:
+ if (get_code_info(coderef, &pkg, &name)) {
+ EXTEND(SP, 2);
+ PUSHs(newSVpv(pkg, 0));
+ PUSHs(newSVpv(name, 0));
+ }
+
+# This is some pretty grotty logic. It _should_ be parallel to the
+# pure Perl version in lib/Class/MOP.pm, so if you want to understand
+# it we suggest you start there.
+void
+is_class_loaded(klass=&PL_sv_undef)
+ SV *klass
+ PREINIT:
+ HV *stash;
+ char *key;
+ I32 keylen;
+ GV *gv;
+ PPCODE:
+ if (!SvPOK(klass) || !SvCUR(klass)) {
+ XSRETURN_NO;
+ }
+
+ stash = gv_stashsv(klass, 0);
+ if (!stash) {
+ XSRETURN_NO;
+ }
+
+ if (hv_exists_ent (stash, key_VERSION, hash_VERSION)) {
+ HE *version = hv_fetch_ent(stash, key_VERSION, 0, hash_VERSION);
+ SV *version_sv;
+ if (version && HeVAL(version) && (version_sv = GvSV(HeVAL(version)))) {
+ if (SvROK(version_sv)) {
+ SV *version_sv_ref = SvRV(version_sv);
+
+ if (SvOK(version_sv_ref)) {
+ XSRETURN_YES;
+ }
+ }
+ else if (SvOK(version_sv)) {
+ XSRETURN_YES;
+ }
+ }
+ }
+
+ if (hv_exists_ent (stash, key_ISA, hash_ISA)) {
+ HE *isa = hv_fetch_ent(stash, key_ISA, 0, hash_ISA);
+ if (isa && HeVAL(isa) && GvAV(HeVAL(isa))) {
+ XSRETURN_YES;
+ }
+ }
+
+ (void)hv_iterinit(stash);
+ while ((gv = (GV *)hv_iternextsv(stash, &key, &keylen))) {
+ if (keylen <= 0) {
+ continue;
+ }
+
+ if (key[keylen - 1] == ':' && key[keylen - 2] == ':') {
+ continue;
+ }
+
+ if (GvCV(gv)) {
+ XSRETURN_YES;
+ }
+ }
+
+ XSRETURN_NO;
+
+MODULE = Class::MOP PACKAGE = Class::MOP::Package
+
+void
+get_all_package_symbols(self, filter=TYPE_FILTER_NONE)
+ SV *self
+ type_filter_t filter
+ PREINIT:
+ HV *stash = NULL;
+ HV *symbols = NULL;
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call get_all_package_symbols as a class method");
+ }
+
+ if (GIMME_V == G_VOID) {
+ XSRETURN_EMPTY;
+ }
+
+ PUTBACK;
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) ) {
+ stash = gv_stashsv(HeVAL(he), 0);
+ }
+
+
+ if (!stash) {
+ XSRETURN_UNDEF;
+ }
+
+ symbols = get_all_package_symbols(stash, filter);
+ PUSHs(sv_2mortal(newRV_noinc((SV *)symbols)));
+
+void
+name(self)
+ SV *self
+ PREINIT:
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call name as a class method");
+ }
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)) )
+ XPUSHs(HeVAL(he));
+ else
+ ST(0) = &PL_sv_undef;
+
+MODULE = Class::MOP PACKAGE = Class::MOP::Attribute
+
+void
+name(self)
+ SV *self
+ PREINIT:
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call name as a class method");
+ }
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
+ XPUSHs(HeVAL(he));
+ else
+ ST(0) = &PL_sv_undef;
+
+MODULE = Class::MOP PACKAGE = Class::MOP::Method
+
+void
+name(self)
+ SV *self
+ PREINIT:
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call name as a class method");
+ }
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)) )
+ XPUSHs(HeVAL(he));
+ else
+ ST(0) = &PL_sv_undef;
+
+void
+package_name(self)
+ SV *self
+ PREINIT:
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call package_name as a class method");
+ }
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_package_name, 0, hash_package_name)) )
+ XPUSHs(HeVAL(he));
+ else
+ ST(0) = &PL_sv_undef;
+
+void
+body(self)
+ SV *self
+ PREINIT:
+ register HE *he;
+ PPCODE:
+ if ( ! SvROK(self) ) {
+ die("Cannot call body as a class method");
+ }
+
+ if ( (he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body)) )
+ XPUSHs(HeVAL(he));
+ else
+ ST(0) = &PL_sv_undef;
+
+
+MODULE = Class::MOP PACKAGE = Class::MOP::Class
+
+void
+get_method_map(self)
+ SV *self
+ PREINIT:
+ HV *const obj = (HV *)SvRV(self);
+ SV *const class_name = HeVAL( hv_fetch_ent(obj, key_package, 0, hash_package) );
+ HV *const stash = gv_stashsv(class_name, 0);
+ UV const current = check_package_cache_flag(stash);
+ SV *const cache_flag = HeVAL( hv_fetch_ent(obj, key_package_cache_flag, TRUE, hash_package_cache_flag));
+ SV *const map_ref = HeVAL( hv_fetch_ent(obj, key_methods, TRUE, hash_methods));
+ PPCODE:
+ /* in $self->{methods} does not yet exist (or got deleted) */
+ if ( !SvROK(map_ref) || SvTYPE(SvRV(map_ref)) != SVt_PVHV ) {
+ SV *new_map_ref = newRV_noinc((SV *)newHV());
+ sv_2mortal(new_map_ref);
+ sv_setsv(map_ref, new_map_ref);
+ }
+
+ if ( !SvOK(cache_flag) || SvUV(cache_flag) != current ) {
+ mop_update_method_map(aTHX_ self, class_name, stash, (HV *)SvRV(map_ref));
+ sv_setuv(cache_flag, check_package_cache_flag(stash)); /* update_cache_flag() */
+ }
+ XPUSHs(map_ref);
projects / gitmo/Class-MOP.git / blobdiff