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#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
typedef OP *B__OP;
int init_done = 0;
#if 0
#define UNIVERSAL_REF_DEBUG(x) x
#else
#define UNIVERSAL_REF_DEBUG(x)
#endif
OP* (*real_pp_ref)(pTHX);
PP(pp_universal_ref) {
dSP; dTARG;
SV* thing;
SV* result;
int count;
if ( OP_REF != PL_op->op_type ) {
/* WTF called us? Whatever it is, I don't want to screw with it. */
return real_pp_ref(aTHX);
}
/* Delegate to the pre-existing function if it isn't an object. */
if ( ! sv_isobject( TOPs ) ) {
/* I only mess with objects. */
return real_pp_ref(aTHX);
}
/* Start our scope. */
thing = POPs;
ENTER;
SAVETMPS;
/* Pass that as an argument to the callback. */
/* TODO: list context. */
PUSHMARK(SP);
XPUSHs(thing);
PUTBACK;
count = call_pv( "UNIVERSAL::ref::_hook", G_SCALAR );
if ( 1 != count )
croak("UNIVERSAL::ref::_hook returned %d elements, expected 1", count);
/* Get our result and increase its refcount so it won't be reaped
by closing this scope. */
/* TODO: list context. */
SPAGAIN;
result = POPs;
SvREFCNT_inc(result);
/* Close our scope. */
FREETMPS;
LEAVE;
/* Just return whatever the callback returned. */
assert( 1 == SvREFCNT(result));
XPUSHs(result);
RETURN;
}
void universal_ref_fixupop( OP* o ) {
/* I'm seeing completely fruity ->op_sibling pointers and I think
perhaps I shouldn't be looking at some ops. I'm hoping that
requiring that I have a valid sort of class will prevent me
from wandering into places I shouldn't be. */
U32 opclass;
UNIVERSAL_REF_DEBUG(printf( "fixing op=%x\n", o ));
opclass = (OA_CLASS_MASK & PL_opargs[o->op_type]) >> OCSHIFT;
if ( opclass < OA_UNOP ) {
return;
}
/* printf("# OP=%x\n",o); */
if ( o->op_type == OP_REF || o->op_ppaddr == real_pp_ref ) {
UNIVERSAL_REF_DEBUG(printf("# XXX\n"));
o->op_ppaddr = Perl_pp_universal_ref;
}
UNIVERSAL_REF_DEBUG(printf("# op_type=%d\n",o->op_type));
UNIVERSAL_REF_DEBUG(printf("# opargs=%x\n",PL_opargs[o->op_type] & ~OA_CLASS_MASK));
UNIVERSAL_REF_DEBUG(printf("# class=%x\n", opclass));
if ( cUNOPx(o)->op_first ) {
UNIVERSAL_REF_DEBUG(printf("# ->first=%x\n",cUNOPx(o)->op_first));
universal_ref_fixupop(cUNOPx(o)->op_first);
}
if ( OpHAS_SIBLING(o) ) {
UNIVERSAL_REF_DEBUG(printf("# ->sibling=%x\n",OpSIBLING(o)));
universal_ref_fixupop(OpSIBLING(o));
}
}
void universal_ref_fixupworld () {
I32 i = 0;
/* TODO: This finds all existing code and replaces ppaddr with the
new pointer. */
/* Fixup stuff that exists. */
/*
if ( PL_main_root ) {
UNIVERSAL_REF_DEBUG(printf("# FIXING PL_main_root\n"));
universal_ref_fixupop( PL_main_root );
}
if ( PL_eval_root ) {
UNIVERSAL_REF_DEBUG(printf("# FIXING PL_eval_root\n"));
universal_ref_fixupop(PL_eval_root);
}
if ( PL_main_cv && CvROOT(PL_main_cv) ) {
UNIVERSAL_REF_DEBUG(printf("# FIXING PL_main_cv\n"));
universal_ref_fixupop(CvROOT(PL_main_cv));
}
if ( PL_compcv && CvROOT(PL_compcv) ) {
UNIVERSAL_REF_DEBUG(printf("# FIXING PL_compcv\n"));
universal_ref_fixupop(CvROOT(PL_compcv));
}
*/
/* Is this too sneaky to live? Dunno. */
/* for ( i = 2; i < PL_savestack_max; i += 2 ) {
if ( PL_savestack[i].any_i32 == SAVEt_SPTR
&& ( &PL_compcv == PL_savestack[i-1].any_ptr
|| &PL_main_cv == PL_savestack[i-1].any_ptr )
&& PL_savestack[i-2].any_ptr ) {
UNIVERSAL_REF_DEBUG(printf("# PL_compcv=%x\n", PL_savestack[i-2].any_ptr));
UNIVERSAL_REF_DEBUG(printf("# file=%s\n",CvFILE((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# root=%x\n",CvROOT((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# gv=%x\n",CvGV((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# xsubany=%x\n",CvXSUBANY((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# xsub=%x\n",CvXSUB((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# start=%x\n",CvSTART((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# stash=%x\n",CvSTASH((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# depth=%x\n",CvDEPTH((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# padlist=%x\n",CvPADLIST((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# outside=%x\n",CvOUTSIDE((CV*)(PL_savestack[i-2].any_ptr))));
UNIVERSAL_REF_DEBUG(printf("# flags=%x\n",CvFLAGS((CV*)(PL_savestack[i-2].any_ptr)))); */
/* universal_ref_fixupop(CvROOT((CV*)(PL_savestack[i-2].any_ptr))); */
/* }
} */
}
MODULE = UNIVERSAL::ref PACKAGE = UNIVERSAL::ref PREFIX = universal_ref_
PROTOTYPES: ENABLE
BOOT:
if ( ! init_done++ ) {
/* Is this a race in threaded perl? */
real_pp_ref = PL_ppaddr[OP_REF];
PL_ppaddr[OP_REF] = Perl_pp_universal_ref;
/* universal_ref_fixupworld(); */
}
void
universal_ref__fixupop( o )
B::OP o
CODE:
universal_ref_fixupop( o );
void
universal_ref__fixupworld()
CODE:
universal_ref_fixupworld();
|
