xs/Class.xs

   1 #include "mop.h"
   2
   3 static void
   4 mop_update_method_map(pTHX_ SV *const self, SV *const class_name, HV *const stash, HV *const map)
   5 {
   6     const char *const class_name_pv = HvNAME(stash); /* must be HvNAME(stash), not SvPV_nolen_const(class_name) */
   7     SV   *method_metaclass_name;
   8     char *method_name;
   9     I32   method_name_len;
  10     SV   *coderef;
  11     HV   *symbols;
  12     dSP;
  13
  14     symbols = mop_get_all_package_symbols(stash, TYPE_FILTER_CODE);
  15     sv_2mortal((SV*)symbols);
  16     (void)hv_iterinit(symbols);
  17     while ( (coderef = hv_iternextsv(symbols, &method_name, &method_name_len)) ) {
  18         CV *cv = (CV *)SvRV(coderef);
  19         char *cvpkg_name;
  20         char *cv_name;
  21         SV *method_slot;
  22         SV *method_object;
  23
  24         if (!mop_get_code_info(coderef, &cvpkg_name, &cv_name)) {
  25             continue;
  26         }
  27
  28         /* this checks to see that the subroutine is actually from our package  */
  29         if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) {
  30             if ( strNE(cvpkg_name, class_name_pv) ) {
  31                 continue;
  32             }
  33         }
  34
  35         method_slot = *hv_fetch(map, method_name, method_name_len, TRUE);
  36         if ( SvOK(method_slot) ) {
  37             SV *const body = mop_call0(aTHX_ method_slot, KEY_FOR(body)); /* $method_object->body() */
  38             if ( SvROK(body) && ((CV *) SvRV(body)) == cv ) {
  39                 continue;
  40             }
  41         }
  42
  43         method_metaclass_name = mop_call0(aTHX_ self, mop_method_metaclass); /* $self->method_metaclass() */
  44
  45         /*
  46             $method_object = $method_metaclass->wrap(
  47                 $cv,
  48                 associated_metaclass => $self,
  49                 package_name         => $class_name,
  50                 name                 => $method_name
  51             );
  52         */
  53         ENTER;
  54         SAVETMPS;
  55
  56         PUSHMARK(SP);
  57         EXTEND(SP, 8);
  58         PUSHs(method_metaclass_name); /* invocant */
  59         mPUSHs(newRV_inc((SV *)cv));
  60         PUSHs(mop_associated_metaclass);
  61         PUSHs(self);
  62         PUSHs(KEY_FOR(package_name));
  63         PUSHs(class_name);
  64         PUSHs(KEY_FOR(name));
  65         mPUSHs(newSVpv(method_name, method_name_len));
  66         PUTBACK;
  67
  68         call_sv(mop_wrap, G_SCALAR | G_METHOD);
  69         SPAGAIN;
  70         method_object = POPs;
  71         PUTBACK;
  72         /* $map->{$method_name} = $method_object */
  73         sv_setsv(method_slot, method_object);
  74
  75         FREETMPS;
  76         LEAVE;
  77     }
  78 }
  79
  80 MODULE = Class::MOP::Class    PACKAGE = Class::MOP::Class
  81
  82 PROTOTYPES: DISABLE
  83
  84 void
  85 get_method_map(self)
  86     SV *self
  87     PREINIT:
  88         HV *const obj        = (HV *)SvRV(self);
  89         SV *const class_name = HeVAL( hv_fetch_ent(obj, KEY_FOR(package), 0, HASH_FOR(package)) );
  90         HV *const stash      = gv_stashsv(class_name, 0);
  91         UV current;
  92         SV *cache_flag;
  93         SV *map_ref;
  94     PPCODE:
  95         if (!stash) {
  96              mXPUSHs(newRV_noinc((SV *)newHV()));
  97              return;
  98         }
  99
 100         current    = mop_check_package_cache_flag(aTHX_ stash);
 101         cache_flag = HeVAL( hv_fetch_ent(obj, KEY_FOR(package_cache_flag), TRUE, HASH_FOR(package_cache_flag)));
 102         map_ref    = HeVAL( hv_fetch_ent(obj, KEY_FOR(methods), TRUE, HASH_FOR(methods)));
 103
 104         /* $self->{methods} does not yet exist (or got deleted) */
 105         if ( !SvROK(map_ref) || SvTYPE(SvRV(map_ref)) != SVt_PVHV ) {
 106             SV *new_map_ref = newRV_noinc((SV *)newHV());
 107             sv_2mortal(new_map_ref);
 108             sv_setsv(map_ref, new_map_ref);
 109         }
 110
 111         if ( !SvOK(cache_flag) || SvUV(cache_flag) != current ) {
 112             mop_update_method_map(aTHX_ self, class_name, stash, (HV *)SvRV(map_ref));
 113             sv_setuv(cache_flag, mop_check_package_cache_flag(aTHX_ stash)); /* update_cache_flag() */
 114         }
 115
 116         XPUSHs(map_ref);