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 /* --- Cleaner version of sv_magicext() ------------------------------------ */
281 STATIC MAGIC *vmg_sv_magicext(pTHX_ SV *sv, SV *obj, const MGVTBL *vtbl, const void *ptr, I32 len) {
282 #define vmg_sv_magicext(S, O, V, P, L) vmg_sv_magicext(aTHX_ (S), (O), (V), (P), (L))
285 mg = sv_magicext(sv, obj, PERL_MAGIC_ext, vtbl, ptr, len);
291 if (mg->mg_flags & MGf_REFCOUNTED)
297 /* --- Safe version of call_sv() ------------------------------------------- */
299 STATIC I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
300 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
302 PERL_CONTEXT saved_cx;
306 old_err = newSVsv(ERRSV);
307 sv_setsv(ERRSV, &PL_sv_undef);
310 cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
311 /* The last popped context will be reused by call_sv(), but our callers may
312 * still need its previous value. Back it up so that it isn't clobbered. */
313 saved_cx = cxstack[cxix];
315 ret = call_sv(sv, flags | G_EVAL);
317 cxstack[cxix] = saved_cx;
320 SvREFCNT_dec(old_err);
322 if (IN_PERL_COMPILETIME) {
325 sv_catsv(PL_errors, ERRSV);
327 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
330 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
332 ++PL_parser->error_count;
333 #elif defined(PL_error_count)
339 if (!cleanup || cleanup(aTHX_ ud))
344 sv_setsv(ERRSV, old_err);
345 SvREFCNT_dec(old_err);
352 /* --- Stolen chunk of B --------------------------------------------------- */
367 #if VMG_HAS_PERL(5, 21, 5)
373 STATIC const char *const vmg_opclassnames[] = {
386 #if VMG_HAS_PERL(5, 21, 5)
392 STATIC opclass vmg_opclass(const OP *o) {
399 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
401 if (o->op_type == OP_SASSIGN)
402 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
404 if (o->op_type == OP_AELEMFAST) {
405 #if PERL_VERSION <= 14
406 if (o->op_flags & OPf_SPECIAL)
418 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
422 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
439 case OA_PVOP_OR_SVOP:
440 return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
445 case OA_BASEOP_OR_UNOP:
446 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
448 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
450 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
452 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
455 if (o->op_flags & OPf_STACKED)
457 else if (o->op_flags & OPf_SPECIAL)
461 #if VMG_HAS_PERL(5, 21, 5)
470 /* --- Error messages ------------------------------------------------------ */
472 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
473 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
474 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
476 /* --- Context-safe global data -------------------------------------------- */
478 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
481 HV *b__op_stashes[OPc_MAX];
484 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
485 vmg_trampoline propagate_errsv;
487 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
488 vmg_trampoline reset_rmg;
494 /* --- <vmg_vtable> structure ---------------------------------------------- */
503 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
504 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
507 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
509 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
515 #define vmg_vtable_vtbl(T) (T)->vtbl
517 STATIC perl_mutex vmg_vtable_refcount_mutex;
519 STATIC vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
520 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
521 VMG_LOCK(&vmg_vtable_refcount_mutex);
523 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
528 STATIC void vmg_vtable_free(pTHX_ vmg_vtable *t) {
529 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
532 VMG_LOCK(&vmg_vtable_refcount_mutex);
533 refcount = --t->refcount;
534 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
537 PerlMemShared_free(t->vtbl);
538 PerlMemShared_free(t);
542 #else /* VMG_THREADSAFE */
544 typedef MGVTBL vmg_vtable;
546 STATIC vmg_vtable *vmg_vtable_alloc(pTHX) {
547 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
550 Newx(t, 1, vmg_vtable);
555 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
557 #define vmg_vtable_free(T) Safefree(T)
559 #endif /* !VMG_THREADSAFE */
561 /* --- <vmg_wizard> structure ---------------------------------------------- */
570 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
575 #endif /* MGf_LOCAL */
577 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
578 #endif /* VMG_UVAR */
581 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo);
583 STATIC vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
584 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
587 Newx(w, 1, vmg_wizard);
590 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
592 vmg_op_info_init(aTHX_ w->opinfo);
594 w->vtable = vmg_vtable_alloc();
599 STATIC void vmg_wizard_free(pTHX_ vmg_wizard *w) {
600 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
604 /* During global destruction, any of the callbacks may already have been
605 * freed, so we can't rely on still being able to access them. */
607 SvREFCNT_dec(w->cb_data);
608 SvREFCNT_dec(w->cb_get);
609 SvREFCNT_dec(w->cb_set);
610 SvREFCNT_dec(w->cb_len);
611 SvREFCNT_dec(w->cb_clear);
612 SvREFCNT_dec(w->cb_free);
613 SvREFCNT_dec(w->cb_copy);
615 SvREFCNT_dec(w->cb_dup);
618 SvREFCNT_dec(w->cb_local);
619 #endif /* MGf_LOCAL */
621 SvREFCNT_dec(w->cb_fetch);
622 SvREFCNT_dec(w->cb_store);
623 SvREFCNT_dec(w->cb_exists);
624 SvREFCNT_dec(w->cb_delete);
625 #endif /* VMG_UVAR */
628 /* PerlMemShared_free() and Safefree() are still fine during global
629 * destruction though. */
630 vmg_vtable_free(w->vtable);
638 #define VMG_CLONE_CB(N) \
639 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
642 STATIC const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
643 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
649 Newx(z, 1, vmg_wizard);
651 z->vtable = vmg_vtable_dup(w->vtable);
653 z->opinfo = w->opinfo;
665 #endif /* MGf_LOCAL */
669 VMG_CLONE_CB(exists);
670 VMG_CLONE_CB(delete);
671 #endif /* VMG_UVAR */
676 #endif /* VMG_THREADSAFE */
678 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
680 /* --- Wizard SV objects --------------------------------------------------- */
682 STATIC int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
683 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
690 STATIC int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
691 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
696 #endif /* VMG_THREADSAFE */
698 STATIC MGVTBL vmg_wizard_sv_vtbl = {
703 vmg_wizard_sv_free, /* free */
706 vmg_wizard_sv_dup, /* dup */
712 #endif /* MGf_LOCAL */
715 STATIC SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
716 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
722 wiz = newSViv(PTR2IV(w));
727 mg = vmg_sv_magicext(wiz, NULL, &vmg_wizard_sv_vtbl, w, 0);
729 mg->mg_flags |= MGf_DUP;
739 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
741 STATIC const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
744 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
745 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
746 return (const vmg_wizard *) mg->mg_ptr;
752 #else /* VMG_THREADSAFE */
754 #define vmg_sv_has_wizard_type(S) SvIOK(S)
756 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
758 #endif /* !VMG_THREADSAFE */
760 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
762 STATIC const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
763 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
764 SV *sv = (SV *) mg->mg_ptr;
766 if (vmg_sv_has_wizard_type(sv))
767 return vmg_wizard_from_sv_nocheck(sv);
773 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
775 /* --- User-level functions implementation --------------------------------- */
777 STATIC const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
781 if (SvTYPE(sv) < SVt_PVMG)
784 wid = vmg_wizard_id(w);
786 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
787 const vmg_wizard *z = vmg_wizard_from_mg(mg);
789 if (z && vmg_wizard_id(z) == wid)
796 /* ... Construct private data .............................................. */
798 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
799 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
809 EXTEND(SP, items + 1);
810 PUSHs(sv_2mortal(newRV_inc(sv)));
811 for (i = 0; i < items; ++i)
815 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
819 #if VMG_HAS_PERL(5, 8, 3)
820 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
822 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
832 STATIC SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
833 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
834 const MAGIC *mg = vmg_find(sv, w);
836 return mg ? mg->mg_obj : NULL;
839 /* ... Magic cast/dispell .................................................. */
843 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
846 struct ufuncs new_uf;
847 struct ufuncs old_uf;
850 #endif /* VMG_UVAR */
852 STATIC void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
853 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
857 prevmagic->mg_moremagic = moremagic;
859 SvMAGIC_set(sv, moremagic);
861 /* Destroy private data */
863 if (mg->mg_type == PERL_MAGIC_uvar) {
864 Safefree(mg->mg_ptr);
866 #endif /* VMG_UVAR */
867 if (mg->mg_obj != sv) {
868 SvREFCNT_dec(mg->mg_obj);
871 /* Unreference the wizard */
872 SvREFCNT_dec((SV *) mg->mg_ptr);
876 #endif /* VMG_UVAR */
879 mg->mg_moremagic = MY_CXT.freed_tokens;
880 MY_CXT.freed_tokens = mg;
882 mg->mg_moremagic = NULL;
887 STATIC int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
888 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
892 MAGIC *moremagic = mg->mg_moremagic;
905 STATIC UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
906 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
915 oldgmg = SvGMAGICAL(sv);
917 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
919 t = vmg_vtable_vtbl(w->vtable);
920 mg = vmg_sv_magicext(sv, data, t, wiz, HEf_SVKEY);
923 mg->mg_flags |= MGf_COPY;
926 mg->mg_flags |= MGf_DUP;
930 mg->mg_flags |= MGf_LOCAL;
931 #endif /* MGf_LOCAL */
933 if (SvTYPE(sv) < SVt_PVHV)
936 /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
937 * magic is actually never called for them. If the GMAGICAL flag was off before
938 * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
939 * now on, then this wizard has get magic. Hence we can work around the
940 * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
941 * has uvar callbacks, it will be turned back on later. */
942 if (!oldgmg && SvGMAGICAL(sv))
947 MAGIC *prevmagic, *moremagic = NULL;
950 ud.new_uf.uf_val = vmg_svt_val;
951 ud.new_uf.uf_set = NULL;
952 ud.new_uf.uf_index = 0;
953 ud.old_uf.uf_val = NULL;
954 ud.old_uf.uf_set = NULL;
955 ud.old_uf.uf_index = 0;
957 /* One uvar magic in the chain is enough. */
958 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
959 moremagic = mg->mg_moremagic;
960 if (mg->mg_type == PERL_MAGIC_uvar)
964 if (mg) { /* Found another uvar magic. */
965 struct ufuncs *uf = (struct ufuncs *) mg->mg_ptr;
966 if (uf->uf_val == vmg_svt_val) {
967 /* It's our uvar magic, nothing to do. oldgmg was true. */
970 /* It's another uvar magic, backup it and replace it by ours. */
972 vmg_mg_del(sv, prevmagic, mg, moremagic);
976 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &ud, sizeof(ud));
978 /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
979 * handled by our uvar callback. */
981 #endif /* VMG_UVAR */
987 STATIC UV vmg_dispell(pTHX_ SV *sv, const vmg_wizard *w) {
988 #define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
991 #endif /* VMG_UVAR */
992 MAGIC *mg, *prevmagic, *moremagic = NULL;
993 IV wid = vmg_wizard_id(w);
995 if (SvTYPE(sv) < SVt_PVMG)
998 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
1001 moremagic = mg->mg_moremagic;
1003 z = vmg_wizard_from_mg(mg);
1005 IV zid = vmg_wizard_id(z);
1009 /* If the current has no uvar, short-circuit uvar deletion. */
1010 uvars = z->uvar ? (uvars + 1) : 0;
1012 } else if (z->uvar) {
1014 /* We can't break here since we need to find the ext magic to delete. */
1016 #else /* VMG_UVAR */
1019 #endif /* !VMG_UVAR */
1025 vmg_mg_del(sv, prevmagic, mg, moremagic);
1028 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
1029 /* mg was the first ext magic in the chain that had uvar */
1031 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
1032 const vmg_wizard *z = vmg_wizard_from_mg(mg);
1043 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
1044 moremagic = mg->mg_moremagic;
1045 if (mg->mg_type == PERL_MAGIC_uvar)
1049 ud = (vmg_uvar_ud *) mg->mg_ptr;
1050 if (ud->old_uf.uf_val || ud->old_uf.uf_set) {
1051 /* Revert the original uvar magic. */
1053 Newx(uf, 1, struct ufuncs);
1056 mg->mg_ptr = (char *) uf;
1057 mg->mg_len = sizeof(*uf);
1059 /* Remove the uvar magic. */
1060 vmg_mg_del(sv, prevmagic, mg, moremagic);
1064 #endif /* VMG_UVAR */
1071 /* ... OP info ............................................................. */
1073 #define VMG_OP_INFO_NAME 1
1074 #define VMG_OP_INFO_OBJECT 2
1077 STATIC perl_mutex vmg_op_name_init_mutex;
1080 STATIC U32 vmg_op_name_init = 0;
1081 STATIC unsigned char vmg_op_name_len[MAXO] = { 0 };
1083 STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo) {
1084 #define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
1086 case VMG_OP_INFO_NAME:
1087 VMG_LOCK(&vmg_op_name_init_mutex);
1088 if (!vmg_op_name_init) {
1090 for (t = 0; t < OP_max; ++t)
1091 vmg_op_name_len[t] = strlen(PL_op_name[t]);
1092 vmg_op_name_init = 1;
1094 VMG_UNLOCK(&vmg_op_name_init_mutex);
1096 case VMG_OP_INFO_OBJECT: {
1098 if (!MY_CXT.b__op_stashes[0]) {
1101 for (c = OPc_NULL; c < OPc_MAX; ++c)
1102 MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
1111 STATIC SV *vmg_op_info(pTHX_ unsigned int opinfo) {
1112 #define vmg_op_info(W) vmg_op_info(aTHX_ (W))
1114 return &PL_sv_undef;
1117 case VMG_OP_INFO_NAME: {
1118 OPCODE t = PL_op->op_type;
1119 return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t]));
1121 case VMG_OP_INFO_OBJECT: {
1123 return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
1124 MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
1130 return &PL_sv_undef;
1133 /* --- svt callbacks ------------------------------------------------------- */
1135 #define VMG_CB_CALL_ARGS_MASK 15
1136 #define VMG_CB_CALL_ARGS_SHIFT 4
1137 #define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) /* 1|2 */
1138 #define VMG_CB_CALL_GUARD 4
1140 STATIC int vmg_dispell_guard_oncroak(pTHX_ void *ud) {
1145 /* If we're at the upmost magic call and we're about to die, we can just free
1146 * the tokens right now, since we will jump past the problematic part of our
1148 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1149 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1150 MY_CXT.freed_tokens = NULL;
1156 STATIC int vmg_dispell_guard_free(pTHX_ SV *sv, MAGIC *mg) {
1157 vmg_magic_chain_free((MAGIC *) mg->mg_ptr, NULL);
1164 STATIC int vmg_dispell_guard_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
1165 /* The freed magic tokens aren't cloned by perl because it cannot reach them
1166 * (they have been detached from their parent SV when they were enqueued).
1167 * Hence there's nothing to purge in the new thread. */
1173 #endif /* VMG_THREADSAFE */
1175 STATIC MGVTBL vmg_dispell_guard_vtbl = {
1180 vmg_dispell_guard_free, /* free */
1183 vmg_dispell_guard_dup, /* dup */
1189 #endif /* MGf_LOCAL */
1192 STATIC SV *vmg_dispell_guard_new(pTHX_ MAGIC *root) {
1193 #define vmg_dispell_guard_new(R) vmg_dispell_guard_new(aTHX_ (R))
1196 guard = sv_newmortal();
1197 vmg_sv_magicext(guard, NULL, &vmg_dispell_guard_vtbl, root, 0);
1202 STATIC int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
1205 unsigned int i, args, opinfo;
1206 MAGIC **chain = NULL;
1211 args = flags & VMG_CB_CALL_ARGS_MASK;
1212 flags >>= VMG_CB_CALL_ARGS_SHIFT;
1213 opinfo = flags & VMG_CB_CALL_OPINFO;
1219 EXTEND(SP, args + 1);
1220 PUSHs(sv_2mortal(newRV_inc(sv)));
1222 for (i = 0; i < args; ++i) {
1223 SV *sva = va_arg(ap, SV *);
1224 PUSHs(sva ? sva : &PL_sv_undef);
1228 XPUSHs(vmg_op_info(opinfo));
1231 if (flags & VMG_CB_CALL_GUARD) {
1234 vmg_call_sv(cb, G_SCALAR, vmg_dispell_guard_oncroak, NULL);
1236 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens)
1237 chain = &MY_CXT.freed_tokens;
1239 vmg_call_sv(cb, G_SCALAR, 0, NULL);
1245 ret = (int) SvIV(svr);
1252 vmg_dispell_guard_new(*chain);
1259 #define VMG_CB_FLAGS(OI, A) \
1260 ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
1262 #define vmg_cb_call1(I, OI, S, A1) \
1263 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
1264 #define vmg_cb_call2(I, OI, S, A1, A2) \
1265 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
1266 #define vmg_cb_call3(I, OI, S, A1, A2, A3) \
1267 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
1269 /* ... Default no-op magic callback ........................................ */
1271 STATIC int vmg_svt_default_noop(pTHX_ SV *sv, MAGIC *mg) {
1275 /* ... get magic ........................................................... */
1277 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
1278 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1280 return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
1283 #define vmg_svt_get_noop vmg_svt_default_noop
1285 /* ... set magic ........................................................... */
1287 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
1288 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1290 return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
1293 #define vmg_svt_set_noop vmg_svt_default_noop
1295 /* ... len magic ........................................................... */
1297 STATIC U32 vmg_sv_len(pTHX_ SV *sv) {
1298 #define vmg_sv_len(S) vmg_sv_len(aTHX_ (S))
1300 #if VMG_HAS_PERL(5, 9, 3)
1301 const U8 *s = VOID2(const U8 *, VOID2(const void *, SvPV_const(sv, len)));
1303 U8 *s = SvPV(sv, len);
1306 return DO_UTF8(sv) ? utf8_length(s, s + len) : len;
1309 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
1310 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1311 unsigned int opinfo = w->opinfo;
1314 svtype t = SvTYPE(sv);
1323 PUSHs(sv_2mortal(newRV_inc(sv)));
1324 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1326 len = vmg_sv_len(sv);
1328 } else if (t == SVt_PVAV) {
1329 len = av_len((AV *) sv) + 1;
1333 PUSHs(&PL_sv_undef);
1336 XPUSHs(vmg_op_info(opinfo));
1339 vmg_call_sv(w->cb_len, G_SCALAR, 0, NULL);
1343 ret = SvOK(svr) ? (U32) SvUV(svr) : len;
1354 STATIC U32 vmg_svt_len_noop(pTHX_ SV *sv, MAGIC *mg) {
1356 svtype t = SvTYPE(sv);
1359 len = vmg_sv_len(sv);
1360 } else if (t == SVt_PVAV) {
1361 len = (U32) av_len((AV *) sv);
1367 /* ... clear magic ......................................................... */
1369 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
1370 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1371 unsigned int flags = w->opinfo;
1373 #if !VMG_HAS_PERL(5, 12, 0)
1374 flags |= VMG_CB_CALL_GUARD;
1377 return vmg_cb_call1(w->cb_clear, flags, sv, mg->mg_obj);
1380 #define vmg_svt_clear_noop vmg_svt_default_noop
1382 /* ... free magic .......................................................... */
1384 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1386 STATIC OP *vmg_pp_propagate_errsv(pTHX) {
1387 SVOP *o = cSVOPx(PL_op);
1390 sv_setsv(ERRSV, o->op_sv);
1391 SvREFCNT_dec(o->op_sv);
1398 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1400 STATIC int vmg_propagate_errsv_free(pTHX_ SV *sv, MAGIC *mg) {
1402 sv_setsv(ERRSV, mg->mg_obj);
1407 /* perl is already kind enough to handle the cloning of the mg_obj member,
1408 hence we don't need to define a dup magic callback. */
1410 STATIC MGVTBL vmg_propagate_errsv_vtbl = {
1415 vmg_propagate_errsv_free, /* free */
1420 #endif /* MGf_LOCAL */
1427 } vmg_svt_free_cleanup_ud;
1429 STATIC int vmg_svt_free_cleanup(pTHX_ void *ud_) {
1430 vmg_svt_free_cleanup_ud *ud = VOID2(vmg_svt_free_cleanup_ud *, ud_);
1433 U32 optype = PL_op ? PL_op->op_type : OP_NULL;
1435 if (optype == OP_LEAVETRY || optype == OP_LEAVEEVAL) {
1436 SV *errsv = newSVsv(ERRSV);
1439 LEAVE_SCOPE(ud->base);
1441 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1442 if (optype == OP_LEAVETRY) {
1444 PL_op = vmg_trampoline_bump(&MY_CXT.propagate_errsv, errsv, PL_op);
1445 } else if (optype == OP_LEAVEEVAL) {
1446 SV *guard = sv_newmortal();
1447 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1449 #else /* !VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1450 # if !VMG_HAS_PERL(5, 8, 9)
1452 SV *guard = sv_newmortal();
1453 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1456 vmg_sv_magicext(ERRSV, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1458 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1463 /* Don't propagate */
1469 /* We are about to croak() while sv is being destroyed. Try to clean up
1473 vmg_mg_del(sv, NULL, mg, mg->mg_moremagic);
1478 vmg_dispell_guard_oncroak(aTHX_ NULL);
1480 /* After that, propagate the error upwards. */
1485 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
1486 vmg_svt_free_cleanup_ud ud;
1487 const vmg_wizard *w;
1493 /* During global destruction, we cannot be sure that the wizard and its free
1494 * callback are still alive. */
1498 w = vmg_wizard_from_mg_nocheck(mg);
1500 /* So that it survives the temp cleanup below */
1501 SvREFCNT_inc_simple_void(sv);
1503 #if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
1504 /* The previous magic tokens were freed but the magic chain wasn't updated, so
1505 * if you access the sv from the callback the old deleted magics will trigger
1506 * and cause memory misreads. Change 32686 solved it that way : */
1507 SvMAGIC_set(sv, mg);
1511 if (cxstack_ix < cxstack_max) {
1512 ud.in_eval = (CxTYPE(cxstack + cxstack_ix + 1) == CXt_EVAL);
1513 ud.base = ud.in_eval ? PL_scopestack[PL_scopestack_ix] : 0;
1524 PUSHs(sv_2mortal(newRV_inc(sv)));
1525 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1527 XPUSHs(vmg_op_info(w->opinfo));
1533 vmg_call_sv(w->cb_free, G_SCALAR, vmg_svt_free_cleanup, &ud);
1535 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1536 /* Free all the tokens in the chain but the current one (if it's present).
1537 * It will be taken care of by our caller, Perl_mg_free(). */
1538 vmg_magic_chain_free(MY_CXT.freed_tokens, mg);
1539 MY_CXT.freed_tokens = NULL;
1546 ret = (int) SvIV(svr);
1552 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
1553 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
1556 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
1557 * mg->mg_ptr reference count */
1561 #define vmg_svt_free_noop vmg_svt_default_noop
1563 #if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
1564 # define VMG_SVT_COPY_KEYLEN_TYPE I32
1566 # define VMG_SVT_COPY_KEYLEN_TYPE int
1569 /* ... copy magic .......................................................... */
1571 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1572 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1576 if (keylen == HEf_SVKEY) {
1579 keysv = newSVpvn(key, keylen);
1582 if (SvTYPE(sv) >= SVt_PVCV)
1583 nsv = sv_2mortal(newRV_inc(nsv));
1585 ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
1587 if (keylen != HEf_SVKEY) {
1588 SvREFCNT_dec(keysv);
1594 STATIC int vmg_svt_copy_noop(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1598 /* ... dup magic ........................................................... */
1601 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1604 #define vmg_svt_dup_noop vmg_svt_dup
1607 /* ... local magic ......................................................... */
1611 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
1612 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1614 return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
1617 #define vmg_svt_local_noop vmg_svt_default_noop
1619 #endif /* MGf_LOCAL */
1621 /* ... uvar magic .......................................................... */
1625 STATIC OP *vmg_pp_reset_rmg(pTHX) {
1626 SVOP *o = cSVOPx(PL_op);
1628 SvRMAGICAL_on(o->op_sv);
1634 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
1636 MAGIC *mg, *umg, *moremagic;
1637 SV *key = NULL, *newkey = NULL;
1640 umg = mg_find(sv, PERL_MAGIC_uvar);
1641 /* umg can't be NULL or we wouldn't be there. */
1643 ud = (vmg_uvar_ud *) umg->mg_ptr;
1645 if (ud->old_uf.uf_val)
1646 ud->old_uf.uf_val(aTHX_ action, sv);
1647 if (ud->old_uf.uf_set)
1648 ud->old_uf.uf_set(aTHX_ action, sv);
1650 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
1651 const vmg_wizard *w;
1653 /* mg may be freed later by the uvar call, so we need to fetch the next
1654 * token before reaching that fateful point. */
1655 moremagic = mg->mg_moremagic;
1657 switch (mg->mg_type) {
1658 case PERL_MAGIC_ext:
1660 case PERL_MAGIC_tied:
1667 w = vmg_wizard_from_mg(mg);
1676 newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
1680 & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)) {
1683 vmg_cb_call2(w->cb_fetch, w->opinfo | VMG_CB_CALL_GUARD, sv,
1686 case HV_FETCH_ISSTORE:
1687 case HV_FETCH_LVALUE:
1688 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
1690 vmg_cb_call2(w->cb_store, w->opinfo | VMG_CB_CALL_GUARD, sv,
1693 case HV_FETCH_ISEXISTS:
1695 vmg_cb_call2(w->cb_exists, w->opinfo | VMG_CB_CALL_GUARD, sv,
1700 vmg_cb_call2(w->cb_delete, w->opinfo | VMG_CB_CALL_GUARD, sv,
1706 if (SvRMAGICAL(sv) && !tied && !(action & (HV_FETCH_ISSTORE|HV_DELETE))) {
1707 /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
1708 * mistaken for a tied hash by the rest of hv_common. It will be reset by
1709 * the op_ppaddr of a new fake op injected between the current and the next
1712 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1716 PL_op = vmg_trampoline_bump(&MY_CXT.reset_rmg, sv, PL_op);
1718 #else /* !VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1720 OP *nop = PL_op->op_next;
1723 if (nop && nop->op_ppaddr == vmg_pp_reset_rmg) {
1724 svop = (SVOP *) nop;
1726 NewOp(1101, svop, 1, SVOP);
1727 svop->op_type = OP_STUB;
1728 svop->op_ppaddr = vmg_pp_reset_rmg;
1729 svop->op_next = nop;
1731 svop->op_private = 0;
1733 PL_op->op_next = (OP *) svop;
1738 #endif /* VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1746 #endif /* VMG_UVAR */
1748 /* --- Macros for the XS section ------------------------------------------- */
1751 # define VMG_CVOK(C) \
1752 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
1754 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
1757 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
1759 #define VMG_SET_CB(S, N) { \
1761 if (SvOK(cb) && SvROK(cb)) { \
1764 SvREFCNT_inc_simple_void(cb); \
1773 #define VMG_SET_SVT_CB(S, N) { \
1775 if (SvOK(cb) && SvROK(cb)) { \
1777 if (VMG_CBOK(cb)) { \
1778 t->svt_ ## N = vmg_svt_ ## N; \
1779 SvREFCNT_inc_simple_void(cb); \
1781 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
1785 t->svt_ ## N = NULL; \
1791 /* --- XS ------------------------------------------------------------------ */
1793 MODULE = Variable::Magic PACKAGE = Variable::Magic
1803 for (c = OPc_NULL; c < OPc_MAX; ++c)
1804 MY_CXT.b__op_stashes[c] = NULL;
1807 MY_CXT.freed_tokens = NULL;
1809 /* XS doesn't like a blank line here */
1810 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1811 vmg_trampoline_init(&MY_CXT.propagate_errsv, vmg_pp_propagate_errsv);
1813 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1814 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1817 /* XS doesn't like a blank line here */
1819 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1820 MUTEX_INIT(&vmg_op_name_init_mutex);
1823 stash = gv_stashpv(__PACKAGE__, 1);
1824 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1825 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1826 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1827 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1828 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1829 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1830 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
1831 newSVuv(VMG_COMPAT_SCALAR_NOLEN));
1832 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1833 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1834 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1835 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1836 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1837 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1838 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1839 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1840 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1841 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1842 newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
1843 newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
1844 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1845 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1846 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1847 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1848 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1849 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
1858 U32 had_b__op_stash = 0;
1864 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1865 if (MY_CXT.b__op_stashes[c])
1866 had_b__op_stash |= (((U32) 1) << c);
1868 old_depth = MY_CXT.depth;
1872 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1873 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
1874 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
1876 MY_CXT.depth = old_depth;
1877 MY_CXT.freed_tokens = NULL;
1881 #endif /* VMG_THREADSAFE */
1888 SV *op_info, *copy_key;
1894 #endif /* MGf_LOCAL */
1897 #endif /* VMG_UVAR */
1898 ) { croak(vmg_wrongargnum); }
1901 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
1902 t = vmg_vtable_vtbl(w->vtable);
1904 VMG_SET_CB(ST(i++), data);
1906 VMG_SET_SVT_CB(ST(i++), get);
1907 VMG_SET_SVT_CB(ST(i++), set);
1908 VMG_SET_SVT_CB(ST(i++), len);
1909 VMG_SET_SVT_CB(ST(i++), clear);
1910 VMG_SET_SVT_CB(ST(i++), free);
1911 VMG_SET_SVT_CB(ST(i++), copy);
1912 /* VMG_SET_SVT_CB(ST(i++), dup); */
1917 VMG_SET_SVT_CB(ST(i++), local);
1918 #endif /* MGf_LOCAL */
1920 VMG_SET_CB(ST(i++), fetch);
1921 VMG_SET_CB(ST(i++), store);
1922 VMG_SET_CB(ST(i++), exists);
1923 VMG_SET_CB(ST(i++), delete);
1926 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
1927 w->uvar = SvTRUE(copy_key) ? 2 : 1;
1928 #endif /* VMG_UVAR */
1930 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
1934 SV *cast(SV *sv, SV *wiz, ...)
1935 PROTOTYPE: \[$@%&*]$@
1937 const vmg_wizard *w = NULL;
1946 wiz = SvRV_const(wiz);
1947 w = vmg_wizard_from_sv(wiz);
1950 croak(vmg_invalid_wiz);
1951 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
1956 getdata(SV *sv, SV *wiz)
1957 PROTOTYPE: \[$@%&*]$
1959 const vmg_wizard *w = NULL;
1963 w = vmg_wizard_from_sv(SvRV_const(wiz));
1965 croak(vmg_invalid_wiz);
1966 data = vmg_data_get(SvRV(sv), w);
1972 SV *dispell(SV *sv, SV *wiz)
1973 PROTOTYPE: \[$@%&*]$
1975 const vmg_wizard *w = NULL;
1978 w = vmg_wizard_from_sv(SvRV_const(wiz));
1980 croak(vmg_invalid_wiz);
1981 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));