1 /* This file is part of the Variable::Magic Perl module.
2 * See http://search.cpan.org/dist/Variable-Magic/ */
4 #include <stdarg.h> /* <va_list>, va_{start,arg,end}, ... */
6 #include <stdio.h> /* sprintf() */
8 #define PERL_NO_GET_CONTEXT
13 #define __PACKAGE__ "Variable::Magic"
17 # define VOID2(T, P) static_cast<T>(P)
19 # define VOID2(T, P) (P)
22 #ifndef VMG_PERL_PATCHLEVEL
24 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
26 # define VMG_PERL_PATCHLEVEL 0
30 #define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
32 #define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S))
34 #define VMG_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (VMG_PERL_PATCHLEVEL >= (P) || (!VMG_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S))))
36 /* --- Threads and multiplicity -------------------------------------------- */
46 /* Safe unless stated otherwise in Makefile.PL */
48 # define VMG_FORKSAFE 1
51 #ifndef VMG_MULTIPLICITY
52 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
53 # define VMG_MULTIPLICITY 1
55 # define VMG_MULTIPLICITY 0
59 #if VMG_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
60 # define VMG_THREADSAFE 1
62 # define MY_CXT_CLONE \
64 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
65 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
66 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
69 # define VMG_THREADSAFE 0
71 # define dMY_CXT dNOOP
73 # define MY_CXT vmg_globaldata
75 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
77 # define MY_CXT_INIT NOOP
79 # define MY_CXT_CLONE NOOP
83 # define VMG_LOCK(M) MUTEX_LOCK(M)
84 # define VMG_UNLOCK(M) MUTEX_UNLOCK(M)
87 # define VMG_UNLOCK(M)
90 /* --- Compatibility ------------------------------------------------------- */
93 # define Newx(v, n, c) New(0, v, n, c)
97 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
101 # define SvRV_const(sv) SvRV((SV *) sv)
104 #ifndef SvREFCNT_inc_simple_void
105 # define SvREFCNT_inc_simple_void(sv) ((void) SvREFCNT_inc(sv))
109 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
112 #ifndef PERL_MAGIC_ext
113 # define PERL_MAGIC_ext '~'
116 #ifndef PERL_MAGIC_tied
117 # define PERL_MAGIC_tied 'P'
124 #ifndef IN_PERL_COMPILETIME
125 # define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
128 /* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
129 * enable them on 5.10 */
130 #if VMG_HAS_PERL(5, 10, 0)
136 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
137 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
139 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
142 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
143 * reverted to dev-5.11 as 9cdcb38b */
144 #if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
145 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
146 # if VMG_HAS_PERL(5, 11, 0)
147 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
149 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
152 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
153 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
156 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
157 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
159 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
160 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
164 /* Applied to dev-5.11 as 34908 */
165 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
166 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
168 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
171 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
172 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
173 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
175 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
178 #if VMG_HAS_PERL(5, 11, 0)
179 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
181 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
184 #if VMG_HAS_PERL(5, 13, 2)
185 # define VMG_COMPAT_GLOB_GET 1
187 # define VMG_COMPAT_GLOB_GET 0
190 /* ... Bug-free mg_magical ................................................. */
192 /* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
194 #if VMG_HAS_PERL(5, 11, 3)
196 #define vmg_mg_magical(S) mg_magical(S)
200 STATIC void vmg_mg_magical(SV *sv) {
204 if ((mg = SvMAGIC(sv))) {
206 const MGVTBL* const vtbl = mg->mg_virtual;
208 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
215 } while ((mg = mg->mg_moremagic));
216 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
223 /* ... Trampoline ops ...................................................... */
225 /* NewOp() isn't public in perl 5.8.0. */
226 #define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
228 #define VMG_NEEDS_TRAMPOLINE VMG_RESET_RMG_NEEDS_TRAMPOLINE
230 #if VMG_NEEDS_TRAMPOLINE
237 STATIC void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
238 t->temp.op_type = OP_STUB;
239 t->temp.op_ppaddr = 0;
240 t->temp.op_next = (OP *) &t->target;
241 t->temp.op_flags = 0;
242 t->temp.op_private = 0;
244 t->target.op_type = OP_STUB;
245 t->target.op_ppaddr = cb;
246 t->target.op_next = NULL;
247 t->target.op_flags = 0;
248 t->target.op_private = 0;
249 t->target.op_sv = NULL;
252 STATIC OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
253 #define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
255 t->temp.op_next = (OP *) &t->target;
257 t->target.op_sv = sv;
258 t->target.op_next = o->op_next;
263 #endif /* VMG_NEEDS_TRAMPOLINE */
265 /* ... Safe version of call_sv() ........................................... */
267 STATIC I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
268 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
269 I32 ret, cxix, in_eval = 0;
270 PERL_CONTEXT saved_cx;
278 if (cxstack_ix < cxstack_max) {
279 cxix = cxstack_ix + 1;
280 in_eval = CxTYPE(cxstack + cxix) == CXt_EVAL;
282 cxix = Perl_cxinc(aTHX);
284 /* The last popped context will be reused by call_sv(), but our callers may
285 * still need its previous value. Back it up so that it isn't clobbered. */
286 saved_cx = cxstack[cxix];
288 ret = call_sv(sv, flags | G_EVAL);
290 cxstack[cxix] = saved_cx;
294 sv_setsv(old_err, ERRSV);
298 if (IN_PERL_COMPILETIME) {
301 sv_catsv(PL_errors, ERRSV);
303 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
306 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
308 ++PL_parser->error_count;
309 #elif defined(PL_error_count)
314 } else if (!in_eval) {
315 if (!cleanup || cleanup(aTHX_ ud))
328 /* --- Stolen chunk of B --------------------------------------------------- */
346 STATIC const char *const vmg_opclassnames[] = {
361 STATIC opclass vmg_opclass(const OP *o) {
368 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
370 if (o->op_type == OP_SASSIGN)
371 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
373 if (o->op_type == OP_AELEMFAST) {
374 #if PERL_VERSION <= 14
375 if (o->op_flags & OPf_SPECIAL)
387 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
391 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
408 case OA_PVOP_OR_SVOP:
409 return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
414 case OA_BASEOP_OR_UNOP:
415 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
417 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
419 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
421 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
424 if (o->op_flags & OPf_STACKED)
426 else if (o->op_flags & OPf_SPECIAL)
435 /* --- Error messages ------------------------------------------------------ */
437 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
438 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
439 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
441 /* --- Context-safe global data -------------------------------------------- */
443 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
446 HV *b__op_stashes[OPc_MAX];
449 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
450 vmg_trampoline reset_rmg;
456 /* --- <vmg_vtable> structure ---------------------------------------------- */
465 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
466 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
469 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
471 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
477 #define vmg_vtable_vtbl(T) (T)->vtbl
479 STATIC perl_mutex vmg_vtable_refcount_mutex;
481 STATIC vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
482 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
483 VMG_LOCK(&vmg_vtable_refcount_mutex);
485 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
490 STATIC void vmg_vtable_free(pTHX_ vmg_vtable *t) {
491 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
494 VMG_LOCK(&vmg_vtable_refcount_mutex);
495 refcount = --t->refcount;
496 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
499 PerlMemShared_free(t->vtbl);
500 PerlMemShared_free(t);
504 #else /* VMG_THREADSAFE */
506 typedef MGVTBL vmg_vtable;
508 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
509 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
512 Newx(t, 1, vmg_vtable);
517 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
519 #define vmg_vtable_free(T) Safefree(T)
521 #endif /* !VMG_THREADSAFE */
523 /* --- <vmg_wizard> structure ---------------------------------------------- */
532 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
537 #endif /* MGf_LOCAL */
539 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
540 #endif /* VMG_UVAR */
543 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo);
545 STATIC vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
546 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
549 Newx(w, 1, vmg_wizard);
552 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
554 vmg_op_info_init(aTHX_ w->opinfo);
556 w->vtable = vmg_vtable_alloc();
561 STATIC void vmg_wizard_free(pTHX_ vmg_wizard *w) {
562 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
566 /* During global destruction, any of the callbacks may already have been
567 * freed, so we can't rely on still being able to access them. */
569 SvREFCNT_dec(w->cb_data);
570 SvREFCNT_dec(w->cb_get);
571 SvREFCNT_dec(w->cb_set);
572 SvREFCNT_dec(w->cb_len);
573 SvREFCNT_dec(w->cb_clear);
574 SvREFCNT_dec(w->cb_free);
575 SvREFCNT_dec(w->cb_copy);
577 SvREFCNT_dec(w->cb_dup);
580 SvREFCNT_dec(w->cb_local);
581 #endif /* MGf_LOCAL */
583 SvREFCNT_dec(w->cb_fetch);
584 SvREFCNT_dec(w->cb_store);
585 SvREFCNT_dec(w->cb_exists);
586 SvREFCNT_dec(w->cb_delete);
587 #endif /* VMG_UVAR */
590 /* PerlMemShared_free() and Safefree() are still fine during global
591 * destruction though. */
592 vmg_vtable_free(w->vtable);
600 #define VMG_CLONE_CB(N) \
601 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
604 STATIC const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
605 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
611 Newx(z, 1, vmg_wizard);
613 z->vtable = vmg_vtable_dup(w->vtable);
615 z->opinfo = w->opinfo;
627 #endif /* MGf_LOCAL */
631 VMG_CLONE_CB(exists);
632 VMG_CLONE_CB(delete);
633 #endif /* VMG_UVAR */
638 #endif /* VMG_THREADSAFE */
640 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
642 /* --- Wizard SV objects --------------------------------------------------- */
644 STATIC int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
645 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
652 STATIC int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
653 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
658 #endif /* VMG_THREADSAFE */
660 STATIC MGVTBL vmg_wizard_sv_vtbl = {
665 vmg_wizard_sv_free, /* free */
668 vmg_wizard_sv_dup, /* dup */
674 #endif /* MGf_LOCAL */
677 STATIC SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
678 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
684 wiz = newSViv(PTR2IV(w));
688 MAGIC *mg = sv_magicext(wiz, NULL, PERL_MAGIC_ext, &vmg_wizard_sv_vtbl,
689 (const char *) w, 0);
692 mg->mg_flags |= MGf_DUP;
702 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
704 STATIC const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
707 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
708 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
709 return (const vmg_wizard *) mg->mg_ptr;
715 #else /* VMG_THREADSAFE */
717 #define vmg_sv_has_wizard_type(S) SvIOK(S)
719 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
721 #endif /* !VMG_THREADSAFE */
723 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
725 STATIC const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
726 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
727 SV *sv = (SV *) mg->mg_ptr;
729 if (vmg_sv_has_wizard_type(sv))
730 return vmg_wizard_from_sv_nocheck(sv);
736 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
738 /* --- User-level functions implementation --------------------------------- */
740 STATIC const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
744 if (SvTYPE(sv) < SVt_PVMG)
747 wid = vmg_wizard_id(w);
749 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
750 const vmg_wizard *z = vmg_wizard_from_mg(mg);
752 if (z && vmg_wizard_id(z) == wid)
759 /* ... Construct private data .............................................. */
761 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
762 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
772 EXTEND(SP, items + 1);
773 PUSHs(sv_2mortal(newRV_inc(sv)));
774 for (i = 0; i < items; ++i)
778 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
782 #if VMG_HAS_PERL(5, 8, 3)
783 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
785 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
795 STATIC SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
796 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
797 const MAGIC *mg = vmg_find(sv, w);
799 return mg ? mg->mg_obj : NULL;
802 /* ... Magic cast/dispell .................................................. */
806 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
809 struct ufuncs new_uf;
810 struct ufuncs old_uf;
813 #endif /* VMG_UVAR */
815 STATIC void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
816 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
820 prevmagic->mg_moremagic = moremagic;
822 SvMAGIC_set(sv, moremagic);
824 /* Destroy private data */
826 if (mg->mg_type == PERL_MAGIC_uvar) {
827 Safefree(mg->mg_ptr);
829 #endif /* VMG_UVAR */
830 if (mg->mg_obj != sv) {
831 SvREFCNT_dec(mg->mg_obj);
834 /* Unreference the wizard */
835 SvREFCNT_dec((SV *) mg->mg_ptr);
839 #endif /* VMG_UVAR */
842 mg->mg_moremagic = MY_CXT.freed_tokens;
843 MY_CXT.freed_tokens = mg;
845 mg->mg_moremagic = NULL;
850 STATIC int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
851 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
855 MAGIC *moremagic = mg->mg_moremagic;
868 STATIC UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
869 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
878 oldgmg = SvGMAGICAL(sv);
880 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
882 t = vmg_vtable_vtbl(w->vtable);
883 mg = sv_magicext(sv, data, PERL_MAGIC_ext, t, (const char *) wiz, HEf_SVKEY);
886 /* sv_magicext() calls mg_magical and increments data's refcount */
890 mg->mg_flags |= MGf_COPY;
893 mg->mg_flags |= MGf_DUP;
897 mg->mg_flags |= MGf_LOCAL;
898 #endif /* MGf_LOCAL */
900 if (SvTYPE(sv) < SVt_PVHV)
903 /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
904 * magic is actually never called for them. If the GMAGICAL flag was off before
905 * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
906 * now on, then this wizard has get magic. Hence we can work around the
907 * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
908 * has uvar callbacks, it will be turned back on later. */
909 if (!oldgmg && SvGMAGICAL(sv))
914 MAGIC *prevmagic, *moremagic = NULL;
917 ud.new_uf.uf_val = vmg_svt_val;
918 ud.new_uf.uf_set = NULL;
919 ud.new_uf.uf_index = 0;
920 ud.old_uf.uf_val = NULL;
921 ud.old_uf.uf_set = NULL;
922 ud.old_uf.uf_index = 0;
924 /* One uvar magic in the chain is enough. */
925 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
926 moremagic = mg->mg_moremagic;
927 if (mg->mg_type == PERL_MAGIC_uvar)
931 if (mg) { /* Found another uvar magic. */
932 struct ufuncs *uf = (struct ufuncs *) mg->mg_ptr;
933 if (uf->uf_val == vmg_svt_val) {
934 /* It's our uvar magic, nothing to do. oldgmg was true. */
937 /* It's another uvar magic, backup it and replace it by ours. */
939 vmg_mg_del(sv, prevmagic, mg, moremagic);
943 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &ud, sizeof(ud));
945 /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
946 * handled by our uvar callback. */
948 #endif /* VMG_UVAR */
954 STATIC UV vmg_dispell(pTHX_ SV *sv, const vmg_wizard *w) {
955 #define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
958 #endif /* VMG_UVAR */
959 MAGIC *mg, *prevmagic, *moremagic = NULL;
960 IV wid = vmg_wizard_id(w);
962 if (SvTYPE(sv) < SVt_PVMG)
965 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
968 moremagic = mg->mg_moremagic;
970 z = vmg_wizard_from_mg(mg);
972 IV zid = vmg_wizard_id(z);
976 /* If the current has no uvar, short-circuit uvar deletion. */
977 uvars = z->uvar ? (uvars + 1) : 0;
979 } else if (z->uvar) {
981 /* We can't break here since we need to find the ext magic to delete. */
986 #endif /* !VMG_UVAR */
992 vmg_mg_del(sv, prevmagic, mg, moremagic);
995 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
996 /* mg was the first ext magic in the chain that had uvar */
998 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
999 const vmg_wizard *z = vmg_wizard_from_mg(mg);
1010 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
1011 moremagic = mg->mg_moremagic;
1012 if (mg->mg_type == PERL_MAGIC_uvar)
1016 ud = (vmg_uvar_ud *) mg->mg_ptr;
1017 if (ud->old_uf.uf_val || ud->old_uf.uf_set) {
1018 /* Revert the original uvar magic. */
1020 Newx(uf, 1, struct ufuncs);
1023 mg->mg_ptr = (char *) uf;
1024 mg->mg_len = sizeof(*uf);
1026 /* Remove the uvar magic. */
1027 vmg_mg_del(sv, prevmagic, mg, moremagic);
1031 #endif /* VMG_UVAR */
1038 /* ... OP info ............................................................. */
1040 #define VMG_OP_INFO_NAME 1
1041 #define VMG_OP_INFO_OBJECT 2
1044 STATIC perl_mutex vmg_op_name_init_mutex;
1047 STATIC U32 vmg_op_name_init = 0;
1048 STATIC unsigned char vmg_op_name_len[MAXO] = { 0 };
1050 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo) {
1051 #define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
1053 case VMG_OP_INFO_NAME:
1054 VMG_LOCK(&vmg_op_name_init_mutex);
1055 if (!vmg_op_name_init) {
1057 for (t = 0; t < OP_max; ++t)
1058 vmg_op_name_len[t] = strlen(PL_op_name[t]);
1059 vmg_op_name_init = 1;
1061 VMG_UNLOCK(&vmg_op_name_init_mutex);
1063 case VMG_OP_INFO_OBJECT: {
1065 if (!MY_CXT.b__op_stashes[0]) {
1068 for (c = OPc_NULL; c < OPc_MAX; ++c)
1069 MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
1078 STATIC SV *vmg_op_info(pTHX_ unsigned int opinfo) {
1079 #define vmg_op_info(W) vmg_op_info(aTHX_ (W))
1081 return &PL_sv_undef;
1084 case VMG_OP_INFO_NAME: {
1085 OPCODE t = PL_op->op_type;
1086 return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t]));
1088 case VMG_OP_INFO_OBJECT: {
1090 return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
1091 MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
1097 return &PL_sv_undef;
1100 /* --- svt callbacks ------------------------------------------------------- */
1102 #define VMG_CB_CALL_ARGS_MASK 15
1103 #define VMG_CB_CALL_ARGS_SHIFT 4
1104 #define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) /* 1|2 */
1105 #define VMG_CB_CALL_GUARD 4
1107 STATIC int vmg_dispell_guard_oncroak(pTHX_ void *ud) {
1112 /* If we're at the upmost magic call and we're about to die, we can just free
1113 * the tokens right now, since we will jump past the problematic part of our
1115 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1116 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1117 MY_CXT.freed_tokens = NULL;
1123 STATIC int vmg_dispell_guard_free(pTHX_ SV *sv, MAGIC *mg) {
1124 vmg_magic_chain_free((MAGIC *) mg->mg_ptr, NULL);
1131 STATIC int vmg_dispell_guard_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
1132 /* The freed magic tokens aren't cloned by perl because it cannot reach them
1133 * (they have been detached from their parent SV when they were enqueued).
1134 * Hence there's nothing to purge in the new thread. */
1140 #endif /* VMG_THREADSAFE */
1142 STATIC MGVTBL vmg_dispell_guard_vtbl = {
1147 vmg_dispell_guard_free, /* free */
1150 vmg_dispell_guard_dup, /* dup */
1156 #endif /* MGf_LOCAL */
1159 STATIC SV *vmg_dispell_guard_new(pTHX_ MAGIC *root) {
1160 #define vmg_dispell_guard_new(R) vmg_dispell_guard_new(aTHX_ (R))
1163 guard = sv_newmortal();
1164 sv_magicext(guard, NULL, PERL_MAGIC_ext, &vmg_dispell_guard_vtbl,
1170 STATIC int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
1173 unsigned int i, args, opinfo;
1174 MAGIC **chain = NULL;
1179 args = flags & VMG_CB_CALL_ARGS_MASK;
1180 flags >>= VMG_CB_CALL_ARGS_SHIFT;
1181 opinfo = flags & VMG_CB_CALL_OPINFO;
1187 EXTEND(SP, args + 1);
1188 PUSHs(sv_2mortal(newRV_inc(sv)));
1190 for (i = 0; i < args; ++i) {
1191 SV *sva = va_arg(ap, SV *);
1192 PUSHs(sva ? sva : &PL_sv_undef);
1196 XPUSHs(vmg_op_info(opinfo));
1199 if (flags & VMG_CB_CALL_GUARD) {
1202 vmg_call_sv(cb, G_SCALAR, vmg_dispell_guard_oncroak, NULL);
1204 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens)
1205 chain = &MY_CXT.freed_tokens;
1207 vmg_call_sv(cb, G_SCALAR, 0, NULL);
1213 ret = (int) SvIV(svr);
1220 vmg_dispell_guard_new(*chain);
1227 #define VMG_CB_FLAGS(OI, A) \
1228 ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
1230 #define vmg_cb_call1(I, OI, S, A1) \
1231 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
1232 #define vmg_cb_call2(I, OI, S, A1, A2) \
1233 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
1234 #define vmg_cb_call3(I, OI, S, A1, A2, A3) \
1235 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
1237 /* ... Default no-op magic callback ........................................ */
1239 STATIC int vmg_svt_default_noop(pTHX_ SV *sv, MAGIC *mg) {
1243 /* ... get magic ........................................................... */
1245 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
1246 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1248 return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
1251 #define vmg_svt_get_noop vmg_svt_default_noop
1253 /* ... set magic ........................................................... */
1255 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
1256 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1258 return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
1261 #define vmg_svt_set_noop vmg_svt_default_noop
1263 /* ... len magic ........................................................... */
1265 STATIC U32 vmg_sv_len(pTHX_ SV *sv) {
1266 #define vmg_sv_len(S) vmg_sv_len(aTHX_ (S))
1268 #if VMG_HAS_PERL(5, 9, 3)
1269 const U8 *s = VOID2(const U8 *, VOID2(const void *, SvPV_const(sv, len)));
1271 U8 *s = SvPV(sv, len);
1274 return DO_UTF8(sv) ? utf8_length(s, s + len) : len;
1277 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
1278 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1279 unsigned int opinfo = w->opinfo;
1282 svtype t = SvTYPE(sv);
1291 PUSHs(sv_2mortal(newRV_inc(sv)));
1292 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1294 len = vmg_sv_len(sv);
1296 } else if (t == SVt_PVAV) {
1297 len = av_len((AV *) sv) + 1;
1301 PUSHs(&PL_sv_undef);
1304 XPUSHs(vmg_op_info(opinfo));
1307 vmg_call_sv(w->cb_len, G_SCALAR, 0, NULL);
1311 ret = SvOK(svr) ? (U32) SvUV(svr) : len;
1322 STATIC U32 vmg_svt_len_noop(pTHX_ SV *sv, MAGIC *mg) {
1324 svtype t = SvTYPE(sv);
1327 len = vmg_sv_len(sv);
1328 } else if (t == SVt_PVAV) {
1329 len = (U32) av_len((AV *) sv);
1335 /* ... clear magic ......................................................... */
1337 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
1338 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1339 unsigned int flags = w->opinfo;
1341 #if !VMG_HAS_PERL(5, 12, 0)
1342 flags |= VMG_CB_CALL_GUARD;
1345 return vmg_cb_call1(w->cb_clear, flags, sv, mg->mg_obj);
1348 #define vmg_svt_clear_noop vmg_svt_default_noop
1350 /* ... free magic .......................................................... */
1352 STATIC int vmg_svt_free_cleanup(pTHX_ void *ud) {
1353 SV *sv = VOID2(SV *, ud);
1356 /* We are about to croak() while sv is being destroyed. Try to clean up
1360 vmg_mg_del(sv, NULL, mg, mg->mg_moremagic);
1365 vmg_dispell_guard_oncroak(aTHX_ ud);
1367 /* After that, propagate the error upwards. */
1371 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
1372 const vmg_wizard *w;
1378 /* During global destruction, we cannot be sure that the wizard and its free
1379 * callback are still alive. */
1383 w = vmg_wizard_from_mg_nocheck(mg);
1385 /* So that it survives the temp cleanup below */
1386 SvREFCNT_inc_simple_void(sv);
1388 #if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
1389 /* The previous magic tokens were freed but the magic chain wasn't updated, so
1390 * if you access the sv from the callback the old deleted magics will trigger
1391 * and cause memory misreads. Change 32686 solved it that way : */
1392 SvMAGIC_set(sv, mg);
1400 PUSHs(sv_2mortal(newRV_inc(sv)));
1401 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1403 XPUSHs(vmg_op_info(w->opinfo));
1409 vmg_call_sv(w->cb_free, G_SCALAR, vmg_svt_free_cleanup, sv);
1411 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1412 /* Free all the tokens in the chain but the current one (if it's present).
1413 * It will be taken care of by our caller, Perl_mg_free(). */
1414 vmg_magic_chain_free(MY_CXT.freed_tokens, mg);
1415 MY_CXT.freed_tokens = NULL;
1422 ret = (int) SvIV(svr);
1428 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
1429 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
1432 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
1433 * mg->mg_ptr reference count */
1437 #define vmg_svt_free_noop vmg_svt_default_noop
1439 #if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
1440 # define VMG_SVT_COPY_KEYLEN_TYPE I32
1442 # define VMG_SVT_COPY_KEYLEN_TYPE int
1445 /* ... copy magic .......................................................... */
1447 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1448 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1452 if (keylen == HEf_SVKEY) {
1455 keysv = newSVpvn(key, keylen);
1458 ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
1460 if (keylen != HEf_SVKEY) {
1461 SvREFCNT_dec(keysv);
1467 STATIC int vmg_svt_copy_noop(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1471 /* ... dup magic ........................................................... */
1474 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1477 #define vmg_svt_dup_noop vmg_svt_dup
1480 /* ... local magic ......................................................... */
1484 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
1485 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1487 return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
1490 #define vmg_svt_local_noop vmg_svt_default_noop
1492 #endif /* MGf_LOCAL */
1494 /* ... uvar magic .......................................................... */
1498 STATIC OP *vmg_pp_reset_rmg(pTHX) {
1499 SVOP *o = cSVOPx(PL_op);
1501 SvRMAGICAL_on(o->op_sv);
1507 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
1509 MAGIC *mg, *umg, *moremagic;
1510 SV *key = NULL, *newkey = NULL;
1513 umg = mg_find(sv, PERL_MAGIC_uvar);
1514 /* umg can't be NULL or we wouldn't be there. */
1516 ud = (vmg_uvar_ud *) umg->mg_ptr;
1518 if (ud->old_uf.uf_val)
1519 ud->old_uf.uf_val(aTHX_ action, sv);
1520 if (ud->old_uf.uf_set)
1521 ud->old_uf.uf_set(aTHX_ action, sv);
1523 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
1524 const vmg_wizard *w;
1526 /* mg may be freed later by the uvar call, so we need to fetch the next
1527 * token before reaching that fateful point. */
1528 moremagic = mg->mg_moremagic;
1530 switch (mg->mg_type) {
1531 case PERL_MAGIC_ext:
1533 case PERL_MAGIC_tied:
1540 w = vmg_wizard_from_mg(mg);
1549 newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
1553 & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)) {
1556 vmg_cb_call2(w->cb_fetch, w->opinfo | VMG_CB_CALL_GUARD, sv,
1559 case HV_FETCH_ISSTORE:
1560 case HV_FETCH_LVALUE:
1561 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
1563 vmg_cb_call2(w->cb_store, w->opinfo | VMG_CB_CALL_GUARD, sv,
1566 case HV_FETCH_ISEXISTS:
1568 vmg_cb_call2(w->cb_exists, w->opinfo | VMG_CB_CALL_GUARD, sv,
1573 vmg_cb_call2(w->cb_delete, w->opinfo | VMG_CB_CALL_GUARD, sv,
1579 if (SvRMAGICAL(sv) && !tied && !(action & (HV_FETCH_ISSTORE|HV_DELETE))) {
1580 /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
1581 * mistaken for a tied hash by the rest of hv_common. It will be reset by
1582 * the op_ppaddr of a new fake op injected between the current and the next
1585 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1589 PL_op = vmg_trampoline_bump(&MY_CXT.reset_rmg, sv, PL_op);
1591 #else /* !VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1593 OP *nop = PL_op->op_next;
1596 if (nop && nop->op_ppaddr == vmg_pp_reset_rmg) {
1597 svop = (SVOP *) nop;
1599 NewOp(1101, svop, 1, SVOP);
1600 svop->op_type = OP_STUB;
1601 svop->op_ppaddr = vmg_pp_reset_rmg;
1602 svop->op_next = nop;
1604 svop->op_private = 0;
1606 PL_op->op_next = (OP *) svop;
1611 #endif /* VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1619 #endif /* VMG_UVAR */
1621 /* --- Macros for the XS section ------------------------------------------- */
1624 # define VMG_CVOK(C) \
1625 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
1627 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
1630 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
1632 #define VMG_SET_CB(S, N) { \
1634 if (SvOK(cb) && SvROK(cb)) { \
1637 SvREFCNT_inc_simple_void(cb); \
1646 #define VMG_SET_SVT_CB(S, N) { \
1648 if (SvOK(cb) && SvROK(cb)) { \
1650 if (VMG_CBOK(cb)) { \
1651 t->svt_ ## N = vmg_svt_ ## N; \
1652 SvREFCNT_inc_simple_void(cb); \
1654 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
1658 t->svt_ ## N = NULL; \
1664 /* --- XS ------------------------------------------------------------------ */
1666 MODULE = Variable::Magic PACKAGE = Variable::Magic
1676 for (c = OPc_NULL; c < OPc_MAX; ++c)
1677 MY_CXT.b__op_stashes[c] = NULL;
1680 MY_CXT.freed_tokens = NULL;
1682 /* XS doesn't like a blank line here */
1683 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1684 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1687 /* XS doesn't like a blank line here */
1689 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1690 MUTEX_INIT(&vmg_op_name_init_mutex);
1693 stash = gv_stashpv(__PACKAGE__, 1);
1694 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1695 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1696 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1697 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1698 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1699 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1700 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1701 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1702 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1703 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1704 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1705 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1706 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1707 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1708 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1709 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1710 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1711 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1712 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1713 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1714 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1715 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
1724 U32 had_b__op_stash = 0;
1730 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1731 if (MY_CXT.b__op_stashes[c])
1732 had_b__op_stash |= (((U32) 1) << c);
1734 old_depth = MY_CXT.depth;
1738 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1739 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
1740 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
1742 MY_CXT.depth = old_depth;
1743 MY_CXT.freed_tokens = NULL;
1747 #endif /* VMG_THREADSAFE */
1754 SV *op_info, *copy_key;
1760 #endif /* MGf_LOCAL */
1763 #endif /* VMG_UVAR */
1764 ) { croak(vmg_wrongargnum); }
1767 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
1768 t = vmg_vtable_vtbl(w->vtable);
1770 VMG_SET_CB(ST(i++), data);
1772 VMG_SET_SVT_CB(ST(i++), get);
1773 VMG_SET_SVT_CB(ST(i++), set);
1774 VMG_SET_SVT_CB(ST(i++), len);
1775 VMG_SET_SVT_CB(ST(i++), clear);
1776 VMG_SET_SVT_CB(ST(i++), free);
1777 VMG_SET_SVT_CB(ST(i++), copy);
1778 /* VMG_SET_SVT_CB(ST(i++), dup); */
1783 VMG_SET_SVT_CB(ST(i++), local);
1784 #endif /* MGf_LOCAL */
1786 VMG_SET_CB(ST(i++), fetch);
1787 VMG_SET_CB(ST(i++), store);
1788 VMG_SET_CB(ST(i++), exists);
1789 VMG_SET_CB(ST(i++), delete);
1792 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
1793 w->uvar = SvTRUE(copy_key) ? 2 : 1;
1794 #endif /* VMG_UVAR */
1796 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
1800 SV *cast(SV *sv, SV *wiz, ...)
1801 PROTOTYPE: \[$@%&*]$@
1803 const vmg_wizard *w = NULL;
1812 wiz = SvRV_const(wiz);
1813 w = vmg_wizard_from_sv(wiz);
1816 croak(vmg_invalid_wiz);
1817 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
1822 getdata(SV *sv, SV *wiz)
1823 PROTOTYPE: \[$@%&*]$
1825 const vmg_wizard *w = NULL;
1829 w = vmg_wizard_from_sv(SvRV_const(wiz));
1831 croak(vmg_invalid_wiz);
1832 data = vmg_data_get(SvRV(sv), w);
1838 SV *dispell(SV *sv, SV *wiz)
1839 PROTOTYPE: \[$@%&*]$
1841 const vmg_wizard *w = NULL;
1844 w = vmg_wizard_from_sv(SvRV_const(wiz));
1846 croak(vmg_invalid_wiz);
1847 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));