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 #if VMG_HAS_PERL(5, 17, 4)
143 # define VMG_COMPAT_SCALAR_NOLEN 1
145 # define VMG_COMPAT_SCALAR_NOLEN 0
148 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
149 * reverted to dev-5.11 as 9cdcb38b */
150 #if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
151 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
152 # if VMG_HAS_PERL(5, 11, 0)
153 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
155 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
158 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
159 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
162 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
163 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
165 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
166 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
170 /* Applied to dev-5.11 as 34908 */
171 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
172 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
174 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
177 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
178 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
179 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
181 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
184 #if VMG_HAS_PERL(5, 11, 0)
185 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
187 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
190 #if VMG_HAS_PERL(5, 17, 0)
191 # define VMG_COMPAT_CODE_COPY_CLONE 1
193 # define VMG_COMPAT_CODE_COPY_CLONE 0
196 #if VMG_HAS_PERL(5, 13, 2)
197 # define VMG_COMPAT_GLOB_GET 1
199 # define VMG_COMPAT_GLOB_GET 0
202 #define VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE (VMG_HAS_PERL(5, 10, 0) && !VMG_HAS_PERL(5, 10, 1))
204 /* NewOp() isn't public in perl 5.8.0. */
205 #define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
207 /* ... Bug-free mg_magical ................................................. */
209 /* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
211 #if VMG_HAS_PERL(5, 11, 3)
213 #define vmg_mg_magical(S) mg_magical(S)
217 STATIC void vmg_mg_magical(SV *sv) {
221 if ((mg = SvMAGIC(sv))) {
223 const MGVTBL* const vtbl = mg->mg_virtual;
225 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
232 } while ((mg = mg->mg_moremagic));
233 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
240 /* --- Trampoline ops ------------------------------------------------------ */
242 #define VMG_NEEDS_TRAMPOLINE VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE || VMG_RESET_RMG_NEEDS_TRAMPOLINE
244 #if VMG_NEEDS_TRAMPOLINE
251 STATIC void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
252 t->temp.op_type = OP_STUB;
253 t->temp.op_ppaddr = 0;
254 t->temp.op_next = (OP *) &t->target;
255 t->temp.op_flags = 0;
256 t->temp.op_private = 0;
258 t->target.op_type = OP_STUB;
259 t->target.op_ppaddr = cb;
260 t->target.op_next = NULL;
261 t->target.op_flags = 0;
262 t->target.op_private = 0;
263 t->target.op_sv = NULL;
266 STATIC OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
267 #define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
269 t->temp.op_next = (OP *) &t->target;
271 t->target.op_sv = sv;
272 t->target.op_next = o->op_next;
277 #endif /* VMG_NEEDS_TRAMPOLINE */
279 /* --- Safe version of call_sv() ------------------------------------------- */
281 STATIC I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
282 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
284 PERL_CONTEXT saved_cx;
292 cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
293 /* The last popped context will be reused by call_sv(), but our callers may
294 * still need its previous value. Back it up so that it isn't clobbered. */
295 saved_cx = cxstack[cxix];
297 ret = call_sv(sv, flags | G_EVAL);
299 cxstack[cxix] = saved_cx;
303 sv_setsv(old_err, ERRSV);
307 if (IN_PERL_COMPILETIME) {
310 sv_catsv(PL_errors, ERRSV);
312 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
315 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
317 ++PL_parser->error_count;
318 #elif defined(PL_error_count)
324 if (!cleanup || cleanup(aTHX_ ud))
337 /* --- Stolen chunk of B --------------------------------------------------- */
355 STATIC const char *const vmg_opclassnames[] = {
370 STATIC opclass vmg_opclass(const OP *o) {
377 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
379 if (o->op_type == OP_SASSIGN)
380 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
382 if (o->op_type == OP_AELEMFAST) {
383 #if PERL_VERSION <= 14
384 if (o->op_flags & OPf_SPECIAL)
396 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
400 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
417 case OA_PVOP_OR_SVOP:
418 return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
423 case OA_BASEOP_OR_UNOP:
424 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
426 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
428 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
430 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
433 if (o->op_flags & OPf_STACKED)
435 else if (o->op_flags & OPf_SPECIAL)
444 /* --- Error messages ------------------------------------------------------ */
446 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
447 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
448 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
450 /* --- Context-safe global data -------------------------------------------- */
452 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
455 HV *b__op_stashes[OPc_MAX];
458 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
459 vmg_trampoline propagate_errsv;
461 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
462 vmg_trampoline reset_rmg;
468 /* --- <vmg_vtable> structure ---------------------------------------------- */
477 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
478 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
481 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
483 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
489 #define vmg_vtable_vtbl(T) (T)->vtbl
491 STATIC perl_mutex vmg_vtable_refcount_mutex;
493 STATIC vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
494 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
495 VMG_LOCK(&vmg_vtable_refcount_mutex);
497 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
502 STATIC void vmg_vtable_free(pTHX_ vmg_vtable *t) {
503 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
506 VMG_LOCK(&vmg_vtable_refcount_mutex);
507 refcount = --t->refcount;
508 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
511 PerlMemShared_free(t->vtbl);
512 PerlMemShared_free(t);
516 #else /* VMG_THREADSAFE */
518 typedef MGVTBL vmg_vtable;
520 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
521 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
524 Newx(t, 1, vmg_vtable);
529 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
531 #define vmg_vtable_free(T) Safefree(T)
533 #endif /* !VMG_THREADSAFE */
535 /* --- <vmg_wizard> structure ---------------------------------------------- */
544 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
549 #endif /* MGf_LOCAL */
551 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
552 #endif /* VMG_UVAR */
555 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo);
557 STATIC vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
558 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
561 Newx(w, 1, vmg_wizard);
564 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
566 vmg_op_info_init(aTHX_ w->opinfo);
568 w->vtable = vmg_vtable_alloc();
573 STATIC void vmg_wizard_free(pTHX_ vmg_wizard *w) {
574 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
578 /* During global destruction, any of the callbacks may already have been
579 * freed, so we can't rely on still being able to access them. */
581 SvREFCNT_dec(w->cb_data);
582 SvREFCNT_dec(w->cb_get);
583 SvREFCNT_dec(w->cb_set);
584 SvREFCNT_dec(w->cb_len);
585 SvREFCNT_dec(w->cb_clear);
586 SvREFCNT_dec(w->cb_free);
587 SvREFCNT_dec(w->cb_copy);
589 SvREFCNT_dec(w->cb_dup);
592 SvREFCNT_dec(w->cb_local);
593 #endif /* MGf_LOCAL */
595 SvREFCNT_dec(w->cb_fetch);
596 SvREFCNT_dec(w->cb_store);
597 SvREFCNT_dec(w->cb_exists);
598 SvREFCNT_dec(w->cb_delete);
599 #endif /* VMG_UVAR */
602 /* PerlMemShared_free() and Safefree() are still fine during global
603 * destruction though. */
604 vmg_vtable_free(w->vtable);
612 #define VMG_CLONE_CB(N) \
613 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
616 STATIC const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
617 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
623 Newx(z, 1, vmg_wizard);
625 z->vtable = vmg_vtable_dup(w->vtable);
627 z->opinfo = w->opinfo;
639 #endif /* MGf_LOCAL */
643 VMG_CLONE_CB(exists);
644 VMG_CLONE_CB(delete);
645 #endif /* VMG_UVAR */
650 #endif /* VMG_THREADSAFE */
652 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
654 /* --- Wizard SV objects --------------------------------------------------- */
656 STATIC int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
657 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
664 STATIC int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
665 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
670 #endif /* VMG_THREADSAFE */
672 STATIC MGVTBL vmg_wizard_sv_vtbl = {
677 vmg_wizard_sv_free, /* free */
680 vmg_wizard_sv_dup, /* dup */
686 #endif /* MGf_LOCAL */
689 STATIC SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
690 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
696 wiz = newSViv(PTR2IV(w));
700 MAGIC *mg = sv_magicext(wiz, NULL, PERL_MAGIC_ext, &vmg_wizard_sv_vtbl,
701 (const char *) w, 0);
704 mg->mg_flags |= MGf_DUP;
714 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
716 STATIC const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
719 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
720 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
721 return (const vmg_wizard *) mg->mg_ptr;
727 #else /* VMG_THREADSAFE */
729 #define vmg_sv_has_wizard_type(S) SvIOK(S)
731 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
733 #endif /* !VMG_THREADSAFE */
735 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
737 STATIC const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
738 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
739 SV *sv = (SV *) mg->mg_ptr;
741 if (vmg_sv_has_wizard_type(sv))
742 return vmg_wizard_from_sv_nocheck(sv);
748 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
750 /* --- User-level functions implementation --------------------------------- */
752 STATIC const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
756 if (SvTYPE(sv) < SVt_PVMG)
759 wid = vmg_wizard_id(w);
761 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
762 const vmg_wizard *z = vmg_wizard_from_mg(mg);
764 if (z && vmg_wizard_id(z) == wid)
771 /* ... Construct private data .............................................. */
773 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
774 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
784 EXTEND(SP, items + 1);
785 PUSHs(sv_2mortal(newRV_inc(sv)));
786 for (i = 0; i < items; ++i)
790 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
794 #if VMG_HAS_PERL(5, 8, 3)
795 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
797 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
807 STATIC SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
808 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
809 const MAGIC *mg = vmg_find(sv, w);
811 return mg ? mg->mg_obj : NULL;
814 /* ... Magic cast/dispell .................................................. */
818 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
821 struct ufuncs new_uf;
822 struct ufuncs old_uf;
825 #endif /* VMG_UVAR */
827 STATIC void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
828 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
832 prevmagic->mg_moremagic = moremagic;
834 SvMAGIC_set(sv, moremagic);
836 /* Destroy private data */
838 if (mg->mg_type == PERL_MAGIC_uvar) {
839 Safefree(mg->mg_ptr);
841 #endif /* VMG_UVAR */
842 if (mg->mg_obj != sv) {
843 SvREFCNT_dec(mg->mg_obj);
846 /* Unreference the wizard */
847 SvREFCNT_dec((SV *) mg->mg_ptr);
851 #endif /* VMG_UVAR */
854 mg->mg_moremagic = MY_CXT.freed_tokens;
855 MY_CXT.freed_tokens = mg;
857 mg->mg_moremagic = NULL;
862 STATIC int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
863 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
867 MAGIC *moremagic = mg->mg_moremagic;
880 STATIC UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
881 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
890 oldgmg = SvGMAGICAL(sv);
892 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
894 t = vmg_vtable_vtbl(w->vtable);
895 mg = sv_magicext(sv, data, PERL_MAGIC_ext, t, (const char *) wiz, HEf_SVKEY);
898 /* sv_magicext() calls mg_magical and increments data's refcount */
902 mg->mg_flags |= MGf_COPY;
905 mg->mg_flags |= MGf_DUP;
909 mg->mg_flags |= MGf_LOCAL;
910 #endif /* MGf_LOCAL */
912 if (SvTYPE(sv) < SVt_PVHV)
915 /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
916 * magic is actually never called for them. If the GMAGICAL flag was off before
917 * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
918 * now on, then this wizard has get magic. Hence we can work around the
919 * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
920 * has uvar callbacks, it will be turned back on later. */
921 if (!oldgmg && SvGMAGICAL(sv))
926 MAGIC *prevmagic, *moremagic = NULL;
929 ud.new_uf.uf_val = vmg_svt_val;
930 ud.new_uf.uf_set = NULL;
931 ud.new_uf.uf_index = 0;
932 ud.old_uf.uf_val = NULL;
933 ud.old_uf.uf_set = NULL;
934 ud.old_uf.uf_index = 0;
936 /* One uvar magic in the chain is enough. */
937 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
938 moremagic = mg->mg_moremagic;
939 if (mg->mg_type == PERL_MAGIC_uvar)
943 if (mg) { /* Found another uvar magic. */
944 struct ufuncs *uf = (struct ufuncs *) mg->mg_ptr;
945 if (uf->uf_val == vmg_svt_val) {
946 /* It's our uvar magic, nothing to do. oldgmg was true. */
949 /* It's another uvar magic, backup it and replace it by ours. */
951 vmg_mg_del(sv, prevmagic, mg, moremagic);
955 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &ud, sizeof(ud));
957 /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
958 * handled by our uvar callback. */
960 #endif /* VMG_UVAR */
966 STATIC UV vmg_dispell(pTHX_ SV *sv, const vmg_wizard *w) {
967 #define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
970 #endif /* VMG_UVAR */
971 MAGIC *mg, *prevmagic, *moremagic = NULL;
972 IV wid = vmg_wizard_id(w);
974 if (SvTYPE(sv) < SVt_PVMG)
977 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
980 moremagic = mg->mg_moremagic;
982 z = vmg_wizard_from_mg(mg);
984 IV zid = vmg_wizard_id(z);
988 /* If the current has no uvar, short-circuit uvar deletion. */
989 uvars = z->uvar ? (uvars + 1) : 0;
991 } else if (z->uvar) {
993 /* We can't break here since we need to find the ext magic to delete. */
998 #endif /* !VMG_UVAR */
1004 vmg_mg_del(sv, prevmagic, mg, moremagic);
1007 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
1008 /* mg was the first ext magic in the chain that had uvar */
1010 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
1011 const vmg_wizard *z = vmg_wizard_from_mg(mg);
1022 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
1023 moremagic = mg->mg_moremagic;
1024 if (mg->mg_type == PERL_MAGIC_uvar)
1028 ud = (vmg_uvar_ud *) mg->mg_ptr;
1029 if (ud->old_uf.uf_val || ud->old_uf.uf_set) {
1030 /* Revert the original uvar magic. */
1032 Newx(uf, 1, struct ufuncs);
1035 mg->mg_ptr = (char *) uf;
1036 mg->mg_len = sizeof(*uf);
1038 /* Remove the uvar magic. */
1039 vmg_mg_del(sv, prevmagic, mg, moremagic);
1043 #endif /* VMG_UVAR */
1050 /* ... OP info ............................................................. */
1052 #define VMG_OP_INFO_NAME 1
1053 #define VMG_OP_INFO_OBJECT 2
1056 STATIC perl_mutex vmg_op_name_init_mutex;
1059 STATIC U32 vmg_op_name_init = 0;
1060 STATIC unsigned char vmg_op_name_len[MAXO] = { 0 };
1062 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo) {
1063 #define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
1065 case VMG_OP_INFO_NAME:
1066 VMG_LOCK(&vmg_op_name_init_mutex);
1067 if (!vmg_op_name_init) {
1069 for (t = 0; t < OP_max; ++t)
1070 vmg_op_name_len[t] = strlen(PL_op_name[t]);
1071 vmg_op_name_init = 1;
1073 VMG_UNLOCK(&vmg_op_name_init_mutex);
1075 case VMG_OP_INFO_OBJECT: {
1077 if (!MY_CXT.b__op_stashes[0]) {
1080 for (c = OPc_NULL; c < OPc_MAX; ++c)
1081 MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
1090 STATIC SV *vmg_op_info(pTHX_ unsigned int opinfo) {
1091 #define vmg_op_info(W) vmg_op_info(aTHX_ (W))
1093 return &PL_sv_undef;
1096 case VMG_OP_INFO_NAME: {
1097 OPCODE t = PL_op->op_type;
1098 return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t]));
1100 case VMG_OP_INFO_OBJECT: {
1102 return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
1103 MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
1109 return &PL_sv_undef;
1112 /* --- svt callbacks ------------------------------------------------------- */
1114 #define VMG_CB_CALL_ARGS_MASK 15
1115 #define VMG_CB_CALL_ARGS_SHIFT 4
1116 #define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) /* 1|2 */
1117 #define VMG_CB_CALL_GUARD 4
1119 STATIC int vmg_dispell_guard_oncroak(pTHX_ void *ud) {
1124 /* If we're at the upmost magic call and we're about to die, we can just free
1125 * the tokens right now, since we will jump past the problematic part of our
1127 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1128 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1129 MY_CXT.freed_tokens = NULL;
1135 STATIC int vmg_dispell_guard_free(pTHX_ SV *sv, MAGIC *mg) {
1136 vmg_magic_chain_free((MAGIC *) mg->mg_ptr, NULL);
1143 STATIC int vmg_dispell_guard_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
1144 /* The freed magic tokens aren't cloned by perl because it cannot reach them
1145 * (they have been detached from their parent SV when they were enqueued).
1146 * Hence there's nothing to purge in the new thread. */
1152 #endif /* VMG_THREADSAFE */
1154 STATIC MGVTBL vmg_dispell_guard_vtbl = {
1159 vmg_dispell_guard_free, /* free */
1162 vmg_dispell_guard_dup, /* dup */
1168 #endif /* MGf_LOCAL */
1171 STATIC SV *vmg_dispell_guard_new(pTHX_ MAGIC *root) {
1172 #define vmg_dispell_guard_new(R) vmg_dispell_guard_new(aTHX_ (R))
1175 guard = sv_newmortal();
1176 sv_magicext(guard, NULL, PERL_MAGIC_ext, &vmg_dispell_guard_vtbl,
1182 STATIC int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
1185 unsigned int i, args, opinfo;
1186 MAGIC **chain = NULL;
1191 args = flags & VMG_CB_CALL_ARGS_MASK;
1192 flags >>= VMG_CB_CALL_ARGS_SHIFT;
1193 opinfo = flags & VMG_CB_CALL_OPINFO;
1199 EXTEND(SP, args + 1);
1200 PUSHs(sv_2mortal(newRV_inc(sv)));
1202 for (i = 0; i < args; ++i) {
1203 SV *sva = va_arg(ap, SV *);
1204 PUSHs(sva ? sva : &PL_sv_undef);
1208 XPUSHs(vmg_op_info(opinfo));
1211 if (flags & VMG_CB_CALL_GUARD) {
1214 vmg_call_sv(cb, G_SCALAR, vmg_dispell_guard_oncroak, NULL);
1216 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens)
1217 chain = &MY_CXT.freed_tokens;
1219 vmg_call_sv(cb, G_SCALAR, 0, NULL);
1225 ret = (int) SvIV(svr);
1232 vmg_dispell_guard_new(*chain);
1239 #define VMG_CB_FLAGS(OI, A) \
1240 ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
1242 #define vmg_cb_call1(I, OI, S, A1) \
1243 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
1244 #define vmg_cb_call2(I, OI, S, A1, A2) \
1245 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
1246 #define vmg_cb_call3(I, OI, S, A1, A2, A3) \
1247 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
1249 /* ... Default no-op magic callback ........................................ */
1251 STATIC int vmg_svt_default_noop(pTHX_ SV *sv, MAGIC *mg) {
1255 /* ... get magic ........................................................... */
1257 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
1258 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1260 return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
1263 #define vmg_svt_get_noop vmg_svt_default_noop
1265 /* ... set magic ........................................................... */
1267 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
1268 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1270 return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
1273 #define vmg_svt_set_noop vmg_svt_default_noop
1275 /* ... len magic ........................................................... */
1277 STATIC U32 vmg_sv_len(pTHX_ SV *sv) {
1278 #define vmg_sv_len(S) vmg_sv_len(aTHX_ (S))
1280 #if VMG_HAS_PERL(5, 9, 3)
1281 const U8 *s = VOID2(const U8 *, VOID2(const void *, SvPV_const(sv, len)));
1283 U8 *s = SvPV(sv, len);
1286 return DO_UTF8(sv) ? utf8_length(s, s + len) : len;
1289 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
1290 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1291 unsigned int opinfo = w->opinfo;
1294 svtype t = SvTYPE(sv);
1303 PUSHs(sv_2mortal(newRV_inc(sv)));
1304 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1306 len = vmg_sv_len(sv);
1308 } else if (t == SVt_PVAV) {
1309 len = av_len((AV *) sv) + 1;
1313 PUSHs(&PL_sv_undef);
1316 XPUSHs(vmg_op_info(opinfo));
1319 vmg_call_sv(w->cb_len, G_SCALAR, 0, NULL);
1323 ret = SvOK(svr) ? (U32) SvUV(svr) : len;
1334 STATIC U32 vmg_svt_len_noop(pTHX_ SV *sv, MAGIC *mg) {
1336 svtype t = SvTYPE(sv);
1339 len = vmg_sv_len(sv);
1340 } else if (t == SVt_PVAV) {
1341 len = (U32) av_len((AV *) sv);
1347 /* ... clear magic ......................................................... */
1349 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
1350 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1351 unsigned int flags = w->opinfo;
1353 #if !VMG_HAS_PERL(5, 12, 0)
1354 flags |= VMG_CB_CALL_GUARD;
1357 return vmg_cb_call1(w->cb_clear, flags, sv, mg->mg_obj);
1360 #define vmg_svt_clear_noop vmg_svt_default_noop
1362 /* ... free magic .......................................................... */
1364 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1366 STATIC OP *vmg_pp_propagate_errsv(pTHX) {
1367 SVOP *o = cSVOPx(PL_op);
1370 SvREFCNT_dec(ERRSV);
1378 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1380 STATIC int vmg_propagate_errsv_free(pTHX_ SV *sv, MAGIC *mg) {
1384 mg->mg_flags &= ~MGf_REFCOUNTED;
1390 /* perl is already kind enough to handle the cloning of the mg_obj member,
1391 hence we don't need to define a dup magic callback. */
1393 STATIC MGVTBL vmg_propagate_errsv_vtbl = {
1398 vmg_propagate_errsv_free, /* free */
1403 #endif /* MGf_LOCAL */
1410 } vmg_svt_free_cleanup_ud;
1412 STATIC int vmg_svt_free_cleanup(pTHX_ void *ud_) {
1413 vmg_svt_free_cleanup_ud *ud = VOID2(vmg_svt_free_cleanup_ud *, ud_);
1416 U32 optype = PL_op ? PL_op->op_type : OP_NULL;
1418 if (optype == OP_LEAVETRY || optype == OP_LEAVEEVAL) {
1419 SV *errsv = newSVsv(ERRSV);
1422 LEAVE_SCOPE(ud->base);
1424 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1425 if (optype == OP_LEAVETRY) {
1427 PL_op = vmg_trampoline_bump(&MY_CXT.propagate_errsv, errsv, PL_op);
1428 } else if (optype == OP_LEAVEEVAL) {
1429 SV *guard = sv_newmortal();
1430 sv_magicext(guard, errsv, PERL_MAGIC_ext, &vmg_propagate_errsv_vtbl,
1433 #else /* !VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1434 # if !VMG_HAS_PERL(5, 8, 9)
1436 SV *guard = sv_newmortal();
1437 sv_magicext(guard, errsv, PERL_MAGIC_ext, &vmg_propagate_errsv_vtbl,
1441 sv_magicext(ERRSV, errsv, PERL_MAGIC_ext, &vmg_propagate_errsv_vtbl,
1443 SvREFCNT_dec(errsv);
1445 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1450 /* Don't propagate */
1456 /* We are about to croak() while sv is being destroyed. Try to clean up
1460 vmg_mg_del(sv, NULL, mg, mg->mg_moremagic);
1465 vmg_dispell_guard_oncroak(aTHX_ NULL);
1467 /* After that, propagate the error upwards. */
1472 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
1473 vmg_svt_free_cleanup_ud ud;
1474 const vmg_wizard *w;
1480 /* During global destruction, we cannot be sure that the wizard and its free
1481 * callback are still alive. */
1485 w = vmg_wizard_from_mg_nocheck(mg);
1487 /* So that it survives the temp cleanup below */
1488 SvREFCNT_inc_simple_void(sv);
1490 #if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
1491 /* The previous magic tokens were freed but the magic chain wasn't updated, so
1492 * if you access the sv from the callback the old deleted magics will trigger
1493 * and cause memory misreads. Change 32686 solved it that way : */
1494 SvMAGIC_set(sv, mg);
1498 if (cxstack_ix < cxstack_max) {
1499 ud.in_eval = (CxTYPE(cxstack + cxstack_ix + 1) == CXt_EVAL);
1500 ud.base = ud.in_eval ? PL_scopestack[PL_scopestack_ix] : 0;
1511 PUSHs(sv_2mortal(newRV_inc(sv)));
1512 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1514 XPUSHs(vmg_op_info(w->opinfo));
1520 vmg_call_sv(w->cb_free, G_SCALAR, vmg_svt_free_cleanup, &ud);
1522 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1523 /* Free all the tokens in the chain but the current one (if it's present).
1524 * It will be taken care of by our caller, Perl_mg_free(). */
1525 vmg_magic_chain_free(MY_CXT.freed_tokens, mg);
1526 MY_CXT.freed_tokens = NULL;
1533 ret = (int) SvIV(svr);
1539 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
1540 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
1543 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
1544 * mg->mg_ptr reference count */
1548 #define vmg_svt_free_noop vmg_svt_default_noop
1550 #if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
1551 # define VMG_SVT_COPY_KEYLEN_TYPE I32
1553 # define VMG_SVT_COPY_KEYLEN_TYPE int
1556 /* ... copy magic .......................................................... */
1558 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1559 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1563 if (keylen == HEf_SVKEY) {
1566 keysv = newSVpvn(key, keylen);
1569 if (SvTYPE(sv) >= SVt_PVCV)
1570 nsv = sv_2mortal(newRV_inc(nsv));
1572 ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
1574 if (keylen != HEf_SVKEY) {
1575 SvREFCNT_dec(keysv);
1581 STATIC int vmg_svt_copy_noop(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1585 /* ... dup magic ........................................................... */
1588 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1591 #define vmg_svt_dup_noop vmg_svt_dup
1594 /* ... local magic ......................................................... */
1598 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
1599 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1601 return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
1604 #define vmg_svt_local_noop vmg_svt_default_noop
1606 #endif /* MGf_LOCAL */
1608 /* ... uvar magic .......................................................... */
1612 STATIC OP *vmg_pp_reset_rmg(pTHX) {
1613 SVOP *o = cSVOPx(PL_op);
1615 SvRMAGICAL_on(o->op_sv);
1621 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
1623 MAGIC *mg, *umg, *moremagic;
1624 SV *key = NULL, *newkey = NULL;
1627 umg = mg_find(sv, PERL_MAGIC_uvar);
1628 /* umg can't be NULL or we wouldn't be there. */
1630 ud = (vmg_uvar_ud *) umg->mg_ptr;
1632 if (ud->old_uf.uf_val)
1633 ud->old_uf.uf_val(aTHX_ action, sv);
1634 if (ud->old_uf.uf_set)
1635 ud->old_uf.uf_set(aTHX_ action, sv);
1637 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
1638 const vmg_wizard *w;
1640 /* mg may be freed later by the uvar call, so we need to fetch the next
1641 * token before reaching that fateful point. */
1642 moremagic = mg->mg_moremagic;
1644 switch (mg->mg_type) {
1645 case PERL_MAGIC_ext:
1647 case PERL_MAGIC_tied:
1654 w = vmg_wizard_from_mg(mg);
1663 newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
1667 & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)) {
1670 vmg_cb_call2(w->cb_fetch, w->opinfo | VMG_CB_CALL_GUARD, sv,
1673 case HV_FETCH_ISSTORE:
1674 case HV_FETCH_LVALUE:
1675 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
1677 vmg_cb_call2(w->cb_store, w->opinfo | VMG_CB_CALL_GUARD, sv,
1680 case HV_FETCH_ISEXISTS:
1682 vmg_cb_call2(w->cb_exists, w->opinfo | VMG_CB_CALL_GUARD, sv,
1687 vmg_cb_call2(w->cb_delete, w->opinfo | VMG_CB_CALL_GUARD, sv,
1693 if (SvRMAGICAL(sv) && !tied && !(action & (HV_FETCH_ISSTORE|HV_DELETE))) {
1694 /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
1695 * mistaken for a tied hash by the rest of hv_common. It will be reset by
1696 * the op_ppaddr of a new fake op injected between the current and the next
1699 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1703 PL_op = vmg_trampoline_bump(&MY_CXT.reset_rmg, sv, PL_op);
1705 #else /* !VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1707 OP *nop = PL_op->op_next;
1710 if (nop && nop->op_ppaddr == vmg_pp_reset_rmg) {
1711 svop = (SVOP *) nop;
1713 NewOp(1101, svop, 1, SVOP);
1714 svop->op_type = OP_STUB;
1715 svop->op_ppaddr = vmg_pp_reset_rmg;
1716 svop->op_next = nop;
1718 svop->op_private = 0;
1720 PL_op->op_next = (OP *) svop;
1725 #endif /* VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1733 #endif /* VMG_UVAR */
1735 /* --- Macros for the XS section ------------------------------------------- */
1738 # define VMG_CVOK(C) \
1739 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
1741 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
1744 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
1746 #define VMG_SET_CB(S, N) { \
1748 if (SvOK(cb) && SvROK(cb)) { \
1751 SvREFCNT_inc_simple_void(cb); \
1760 #define VMG_SET_SVT_CB(S, N) { \
1762 if (SvOK(cb) && SvROK(cb)) { \
1764 if (VMG_CBOK(cb)) { \
1765 t->svt_ ## N = vmg_svt_ ## N; \
1766 SvREFCNT_inc_simple_void(cb); \
1768 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
1772 t->svt_ ## N = NULL; \
1778 /* --- XS ------------------------------------------------------------------ */
1780 MODULE = Variable::Magic PACKAGE = Variable::Magic
1790 for (c = OPc_NULL; c < OPc_MAX; ++c)
1791 MY_CXT.b__op_stashes[c] = NULL;
1794 MY_CXT.freed_tokens = NULL;
1796 /* XS doesn't like a blank line here */
1797 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1798 vmg_trampoline_init(&MY_CXT.propagate_errsv, vmg_pp_propagate_errsv);
1800 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1801 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1804 /* XS doesn't like a blank line here */
1806 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1807 MUTEX_INIT(&vmg_op_name_init_mutex);
1810 stash = gv_stashpv(__PACKAGE__, 1);
1811 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1812 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1813 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1814 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1815 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1816 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1817 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
1818 newSVuv(VMG_COMPAT_SCALAR_NOLEN));
1819 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1820 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1821 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1822 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1823 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1824 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1825 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1826 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1827 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1828 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1829 newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
1830 newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
1831 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1832 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1833 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1834 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1835 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1836 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
1845 U32 had_b__op_stash = 0;
1851 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1852 if (MY_CXT.b__op_stashes[c])
1853 had_b__op_stash |= (((U32) 1) << c);
1855 old_depth = MY_CXT.depth;
1859 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1860 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
1861 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
1863 MY_CXT.depth = old_depth;
1864 MY_CXT.freed_tokens = NULL;
1868 #endif /* VMG_THREADSAFE */
1875 SV *op_info, *copy_key;
1881 #endif /* MGf_LOCAL */
1884 #endif /* VMG_UVAR */
1885 ) { croak(vmg_wrongargnum); }
1888 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
1889 t = vmg_vtable_vtbl(w->vtable);
1891 VMG_SET_CB(ST(i++), data);
1893 VMG_SET_SVT_CB(ST(i++), get);
1894 VMG_SET_SVT_CB(ST(i++), set);
1895 VMG_SET_SVT_CB(ST(i++), len);
1896 VMG_SET_SVT_CB(ST(i++), clear);
1897 VMG_SET_SVT_CB(ST(i++), free);
1898 VMG_SET_SVT_CB(ST(i++), copy);
1899 /* VMG_SET_SVT_CB(ST(i++), dup); */
1904 VMG_SET_SVT_CB(ST(i++), local);
1905 #endif /* MGf_LOCAL */
1907 VMG_SET_CB(ST(i++), fetch);
1908 VMG_SET_CB(ST(i++), store);
1909 VMG_SET_CB(ST(i++), exists);
1910 VMG_SET_CB(ST(i++), delete);
1913 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
1914 w->uvar = SvTRUE(copy_key) ? 2 : 1;
1915 #endif /* VMG_UVAR */
1917 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
1921 SV *cast(SV *sv, SV *wiz, ...)
1922 PROTOTYPE: \[$@%&*]$@
1924 const vmg_wizard *w = NULL;
1933 wiz = SvRV_const(wiz);
1934 w = vmg_wizard_from_sv(wiz);
1937 croak(vmg_invalid_wiz);
1938 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
1943 getdata(SV *sv, SV *wiz)
1944 PROTOTYPE: \[$@%&*]$
1946 const vmg_wizard *w = NULL;
1950 w = vmg_wizard_from_sv(SvRV_const(wiz));
1952 croak(vmg_invalid_wiz);
1953 data = vmg_data_get(SvRV(sv), w);
1959 SV *dispell(SV *sv, SV *wiz)
1960 PROTOTYPE: \[$@%&*]$
1962 const vmg_wizard *w = NULL;
1965 w = vmg_wizard_from_sv(SvRV_const(wiz));
1967 croak(vmg_invalid_wiz);
1968 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));