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)
53 # define VMG_MULTIPLICITY 1
55 # define VMG_MULTIPLICITY 0
59 # ifndef PERL_IMPLICIT_CONTEXT
60 # error MULTIPLICITY builds must set PERL_IMPLICIT_CONTEXT
64 #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))
65 # define VMG_THREADSAFE 1
67 # define MY_CXT_CLONE \
69 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
70 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
71 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
74 # define VMG_THREADSAFE 0
76 # define dMY_CXT dNOOP
78 # define MY_CXT vmg_globaldata
80 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
82 # define MY_CXT_INIT NOOP
84 # define MY_CXT_CLONE NOOP
88 # define VMG_LOCK(M) MUTEX_LOCK(M)
89 # define VMG_UNLOCK(M) MUTEX_UNLOCK(M)
92 # define VMG_UNLOCK(M)
95 /* --- Compatibility ------------------------------------------------------- */
98 # define Newx(v, n, c) New(0, v, n, c)
102 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
106 # define SvRV_const(sv) SvRV((SV *) sv)
109 #ifndef SvREFCNT_inc_simple_void
110 # define SvREFCNT_inc_simple_void(sv) ((void) SvREFCNT_inc(sv))
114 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
117 #ifndef PERL_MAGIC_ext
118 # define PERL_MAGIC_ext '~'
121 #ifndef PERL_MAGIC_tied
122 # define PERL_MAGIC_tied 'P'
129 #ifndef IN_PERL_COMPILETIME
130 # define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
133 /* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
134 * enable them on 5.10 */
135 #if VMG_HAS_PERL(5, 10, 0)
141 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
142 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
144 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
147 #if VMG_HAS_PERL(5, 17, 4)
148 # define VMG_COMPAT_SCALAR_NOLEN 1
150 # define VMG_COMPAT_SCALAR_NOLEN 0
153 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
154 * reverted to dev-5.11 as 9cdcb38b */
155 #if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
156 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
157 # if VMG_HAS_PERL(5, 11, 0)
158 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
160 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
163 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
164 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
167 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
168 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
170 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
171 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
175 /* Applied to dev-5.11 as 34908 */
176 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
177 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
179 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
182 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
183 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
184 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
186 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
189 #if VMG_HAS_PERL(5, 11, 0)
190 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
192 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
195 #if VMG_HAS_PERL(5, 17, 0)
196 # define VMG_COMPAT_CODE_COPY_CLONE 1
198 # define VMG_COMPAT_CODE_COPY_CLONE 0
201 #if VMG_HAS_PERL(5, 13, 2)
202 # define VMG_COMPAT_GLOB_GET 1
204 # define VMG_COMPAT_GLOB_GET 0
207 #define VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE (VMG_HAS_PERL(5, 10, 0) && !VMG_HAS_PERL(5, 10, 1))
209 /* NewOp() isn't public in perl 5.8.0. */
210 #define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
212 /* ... Bug-free mg_magical ................................................. */
214 /* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
216 #if VMG_HAS_PERL(5, 11, 3)
218 #define vmg_mg_magical(S) mg_magical(S)
222 static void vmg_mg_magical(SV *sv) {
226 if ((mg = SvMAGIC(sv))) {
228 const MGVTBL* const vtbl = mg->mg_virtual;
230 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
237 } while ((mg = mg->mg_moremagic));
238 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
245 /* --- Trampoline ops ------------------------------------------------------ */
247 #define VMG_NEEDS_TRAMPOLINE VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE || VMG_RESET_RMG_NEEDS_TRAMPOLINE
249 #if VMG_NEEDS_TRAMPOLINE
256 static void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
257 t->temp.op_type = OP_STUB;
258 t->temp.op_ppaddr = 0;
259 t->temp.op_next = (OP *) &t->target;
260 t->temp.op_flags = 0;
261 t->temp.op_private = 0;
263 t->target.op_type = OP_STUB;
264 t->target.op_ppaddr = cb;
265 t->target.op_next = NULL;
266 t->target.op_flags = 0;
267 t->target.op_private = 0;
268 t->target.op_sv = NULL;
271 static OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
272 #define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
274 t->temp.op_next = (OP *) &t->target;
276 t->target.op_sv = sv;
277 t->target.op_next = o->op_next;
282 #endif /* VMG_NEEDS_TRAMPOLINE */
284 /* --- Cleaner version of sv_magicext() ------------------------------------ */
286 static MAGIC *vmg_sv_magicext(pTHX_ SV *sv, SV *obj, const MGVTBL *vtbl, const void *ptr, I32 len) {
287 #define vmg_sv_magicext(S, O, V, P, L) vmg_sv_magicext(aTHX_ (S), (O), (V), (P), (L))
290 mg = sv_magicext(sv, obj, PERL_MAGIC_ext, vtbl, ptr, len);
297 mg->mg_flags |= MGf_COPY;
300 mg->mg_flags |= MGf_DUP;
304 mg->mg_flags |= MGf_LOCAL;
305 #endif /* MGf_LOCAL */
307 if (mg->mg_flags & MGf_REFCOUNTED)
313 /* --- Safe version of call_sv() ------------------------------------------- */
315 static I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
316 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
318 PERL_CONTEXT saved_cx;
322 old_err = newSVsv(ERRSV);
323 sv_setsv(ERRSV, &PL_sv_undef);
326 cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
327 /* The last popped context will be reused by call_sv(), but our callers may
328 * still need its previous value. Back it up so that it isn't clobbered. */
329 saved_cx = cxstack[cxix];
331 ret = call_sv(sv, flags | G_EVAL);
333 cxstack[cxix] = saved_cx;
336 SvREFCNT_dec(old_err);
338 if (IN_PERL_COMPILETIME) {
341 sv_catsv(PL_errors, ERRSV);
343 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
346 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
348 ++PL_parser->error_count;
349 #elif defined(PL_error_count)
355 if (!cleanup || cleanup(aTHX_ ud))
360 sv_setsv(ERRSV, old_err);
361 SvREFCNT_dec(old_err);
368 /* --- Stolen chunk of B --------------------------------------------------- */
383 #if VMG_HAS_PERL(5, 21, 5)
389 static const char *const vmg_opclassnames[] = {
402 #if VMG_HAS_PERL(5, 21, 5)
408 static opclass vmg_opclass(const OP *o) {
415 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
417 if (o->op_type == OP_SASSIGN)
418 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
420 if (o->op_type == OP_AELEMFAST) {
421 #if PERL_VERSION <= 14
422 if (o->op_flags & OPf_SPECIAL)
434 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
438 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
455 case OA_PVOP_OR_SVOP:
456 return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
461 case OA_BASEOP_OR_UNOP:
462 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
464 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
466 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
468 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
471 if (o->op_flags & OPf_STACKED)
473 else if (o->op_flags & OPf_SPECIAL)
477 #if VMG_HAS_PERL(5, 21, 5)
486 /* --- Error messages ------------------------------------------------------ */
488 static const char vmg_invalid_wiz[] = "Invalid wizard object";
489 static const char vmg_wrongargnum[] = "Wrong number of arguments";
490 static const char vmg_argstorefailed[] = "Error while storing arguments";
492 /* --- Context-safe global data -------------------------------------------- */
494 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
497 HV *b__op_stashes[OPc_MAX];
500 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
501 vmg_trampoline propagate_errsv;
503 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
504 vmg_trampoline reset_rmg;
510 /* --- <vmg_vtable> structure ---------------------------------------------- */
519 static vmg_vtable *vmg_vtable_alloc(pTHX) {
520 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
523 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
525 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
531 #define vmg_vtable_vtbl(T) (T)->vtbl
533 static perl_mutex vmg_vtable_refcount_mutex;
535 static vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
536 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
537 VMG_LOCK(&vmg_vtable_refcount_mutex);
539 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
544 static void vmg_vtable_free(pTHX_ vmg_vtable *t) {
545 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
548 VMG_LOCK(&vmg_vtable_refcount_mutex);
549 refcount = --t->refcount;
550 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
553 PerlMemShared_free(t->vtbl);
554 PerlMemShared_free(t);
558 #else /* VMG_THREADSAFE */
560 typedef MGVTBL vmg_vtable;
562 static vmg_vtable *vmg_vtable_alloc(pTHX) {
563 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
566 Newx(t, 1, vmg_vtable);
571 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
573 #define vmg_vtable_free(T) Safefree(T)
575 #endif /* !VMG_THREADSAFE */
577 /* --- <vmg_wizard> structure ---------------------------------------------- */
586 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
591 #endif /* MGf_LOCAL */
593 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
594 #endif /* VMG_UVAR */
597 static void vmg_op_info_init(pTHX_ unsigned int opinfo);
599 static vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
600 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
603 Newx(w, 1, vmg_wizard);
606 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
608 vmg_op_info_init(aTHX_ w->opinfo);
610 w->vtable = vmg_vtable_alloc();
615 static void vmg_wizard_free(pTHX_ vmg_wizard *w) {
616 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
620 /* During global destruction, any of the callbacks may already have been
621 * freed, so we can't rely on still being able to access them. */
623 SvREFCNT_dec(w->cb_data);
624 SvREFCNT_dec(w->cb_get);
625 SvREFCNT_dec(w->cb_set);
626 SvREFCNT_dec(w->cb_len);
627 SvREFCNT_dec(w->cb_clear);
628 SvREFCNT_dec(w->cb_free);
629 SvREFCNT_dec(w->cb_copy);
631 SvREFCNT_dec(w->cb_dup);
634 SvREFCNT_dec(w->cb_local);
635 #endif /* MGf_LOCAL */
637 SvREFCNT_dec(w->cb_fetch);
638 SvREFCNT_dec(w->cb_store);
639 SvREFCNT_dec(w->cb_exists);
640 SvREFCNT_dec(w->cb_delete);
641 #endif /* VMG_UVAR */
644 /* PerlMemShared_free() and Safefree() are still fine during global
645 * destruction though. */
646 vmg_vtable_free(w->vtable);
654 #define VMG_CLONE_CB(N) \
655 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
658 static const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
659 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
665 Newx(z, 1, vmg_wizard);
667 z->vtable = vmg_vtable_dup(w->vtable);
669 z->opinfo = w->opinfo;
681 #endif /* MGf_LOCAL */
685 VMG_CLONE_CB(exists);
686 VMG_CLONE_CB(delete);
687 #endif /* VMG_UVAR */
692 #endif /* VMG_THREADSAFE */
694 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
696 /* --- Wizard SV objects --------------------------------------------------- */
698 static int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
699 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
706 static int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
707 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
712 #endif /* VMG_THREADSAFE */
714 static MGVTBL vmg_wizard_sv_vtbl = {
719 vmg_wizard_sv_free, /* free */
722 vmg_wizard_sv_dup, /* dup */
728 #endif /* MGf_LOCAL */
731 static SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
732 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
738 wiz = newSViv(PTR2IV(w));
741 vmg_sv_magicext(wiz, NULL, &vmg_wizard_sv_vtbl, w, 0);
750 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
752 static const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
755 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
756 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
757 return (const vmg_wizard *) mg->mg_ptr;
763 #else /* VMG_THREADSAFE */
765 #define vmg_sv_has_wizard_type(S) SvIOK(S)
767 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
769 #endif /* !VMG_THREADSAFE */
771 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
773 static const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
774 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
775 SV *sv = (SV *) mg->mg_ptr;
777 if (vmg_sv_has_wizard_type(sv))
778 return vmg_wizard_from_sv_nocheck(sv);
784 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
786 /* --- User-level functions implementation --------------------------------- */
788 static const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
792 if (SvTYPE(sv) < SVt_PVMG)
795 wid = vmg_wizard_id(w);
797 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
798 const vmg_wizard *z = vmg_wizard_from_mg(mg);
800 if (z && vmg_wizard_id(z) == wid)
807 /* ... Construct private data .............................................. */
809 static SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
810 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
820 EXTEND(SP, items + 1);
821 PUSHs(sv_2mortal(newRV_inc(sv)));
822 for (i = 0; i < items; ++i)
826 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
830 #if VMG_HAS_PERL(5, 8, 3)
831 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
833 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
843 static SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
844 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
845 const MAGIC *mg = vmg_find(sv, w);
847 return mg ? mg->mg_obj : NULL;
850 /* ... Magic cast/dispell .................................................. */
854 static I32 vmg_svt_val(pTHX_ IV, SV *);
857 struct ufuncs new_uf;
858 struct ufuncs old_uf;
861 #endif /* VMG_UVAR */
863 static void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
864 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
868 prevmagic->mg_moremagic = moremagic;
870 SvMAGIC_set(sv, moremagic);
872 /* Destroy private data */
874 if (mg->mg_type == PERL_MAGIC_uvar) {
875 Safefree(mg->mg_ptr);
877 #endif /* VMG_UVAR */
878 if (mg->mg_obj != sv) {
879 SvREFCNT_dec(mg->mg_obj);
882 /* Unreference the wizard */
883 SvREFCNT_dec((SV *) mg->mg_ptr);
887 #endif /* VMG_UVAR */
890 mg->mg_moremagic = MY_CXT.freed_tokens;
891 MY_CXT.freed_tokens = mg;
893 mg->mg_moremagic = NULL;
898 static int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
899 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
903 MAGIC *moremagic = mg->mg_moremagic;
916 static UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
917 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
926 oldgmg = SvGMAGICAL(sv);
928 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
930 t = vmg_vtable_vtbl(w->vtable);
931 mg = vmg_sv_magicext(sv, data, t, wiz, HEf_SVKEY);
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 /* --- Global setup/teardown ----------------------------------------------- */
1750 static VOL U32 vmg_initialized = 0;
1752 static void vmg_global_teardown_late(pTHX) {
1753 #define vmg_global_teardown_late() vmg_global_teardown_late(aTHX)
1755 MUTEX_DESTROY(&vmg_op_name_init_mutex);
1756 MUTEX_DESTROY(&vmg_vtable_refcount_mutex);
1759 vmg_initialized = 0;
1764 static int vmg_global_teardown_free(pTHX_ SV *sv, MAGIC *mg) {
1765 vmg_global_teardown_late();
1770 static MGVTBL vmg_global_teardown_vtbl = {
1775 vmg_global_teardown_free
1787 static signed char vmg_destruct_level(pTHX) {
1788 #define vmg_destruct_level() vmg_destruct_level(aTHX)
1791 lvl = PL_perl_destruct_level;
1795 const char *s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1798 #if VMG_HAS_PERL(5, 21, 3)
1799 if (strEQ(s, "-1")) {
1802 # if VMG_HAS_PERL(5, 21, 10)
1804 if (Perl_grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
1808 # else /* VMG_HAS_PERL(5, 21, 3) && !VMG_HAS_PERL(5, 21, 10) */
1809 i = Perl_grok_atou(s, NULL);
1812 #else /* !VMG_HAS_PERL(5, 21, 3) */
1824 static void vmg_global_teardown(pTHX_ void *root) {
1825 if (!vmg_initialized)
1828 #if VMG_MULTIPLICITY
1833 if (vmg_destruct_level() == 0) {
1834 vmg_global_teardown_late();
1837 PL_strtab = newHV();
1838 vmg_sv_magicext((SV *) PL_strtab, NULL, &vmg_global_teardown_vtbl, NULL, 0);
1844 static void vmg_global_setup(pTHX) {
1845 #define vmg_global_setup() vmg_global_setup(aTHX)
1846 if (vmg_initialized)
1850 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1851 MUTEX_INIT(&vmg_op_name_init_mutex);
1854 #if VMG_MULTIPLICITY
1855 call_atexit(vmg_global_teardown, aTHX);
1857 call_atexit(vmg_global_teardown, NULL);
1860 vmg_initialized = 1;
1865 /* --- Interpreter setup/teardown ------------------------------------------ */
1867 static void vmg_local_teardown(pTHX_ void *param) {
1870 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1871 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1872 MY_CXT.freed_tokens = NULL;
1878 static void vmg_local_setup(pTHX) {
1879 #define vmg_local_setup() vmg_local_setup(aTHX)
1884 for (c = OPc_NULL; c < OPc_MAX; ++c)
1885 MY_CXT.b__op_stashes[c] = NULL;
1888 MY_CXT.freed_tokens = NULL;
1890 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1891 vmg_trampoline_init(&MY_CXT.propagate_errsv, vmg_pp_propagate_errsv);
1893 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1894 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1897 stash = gv_stashpv(__PACKAGE__, 1);
1898 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1899 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1900 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1901 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1902 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1903 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1904 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
1905 newSVuv(VMG_COMPAT_SCALAR_NOLEN));
1906 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1907 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1908 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1909 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1910 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1911 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1912 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1913 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1914 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1915 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1916 newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
1917 newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
1918 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1919 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1920 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1921 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1922 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1923 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
1925 call_atexit(vmg_local_teardown, NULL);
1930 /* --- Macros for the XS section ------------------------------------------- */
1933 # define VMG_CVOK(C) \
1934 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
1936 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
1939 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
1941 #define VMG_SET_CB(S, N) { \
1943 if (SvOK(cb) && SvROK(cb)) { \
1946 SvREFCNT_inc_simple_void(cb); \
1955 #define VMG_SET_SVT_CB(S, N) { \
1957 if (SvOK(cb) && SvROK(cb)) { \
1959 if (VMG_CBOK(cb)) { \
1960 t->svt_ ## N = vmg_svt_ ## N; \
1961 SvREFCNT_inc_simple_void(cb); \
1963 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
1967 t->svt_ ## N = NULL; \
1973 /* --- XS ------------------------------------------------------------------ */
1975 MODULE = Variable::Magic PACKAGE = Variable::Magic
1991 U32 had_b__op_stash = 0;
1997 for (c = OPc_NULL; c < OPc_MAX; ++c) {
1998 if (MY_CXT.b__op_stashes[c])
1999 had_b__op_stash |= (((U32) 1) << c);
2001 old_depth = MY_CXT.depth;
2005 for (c = OPc_NULL; c < OPc_MAX; ++c) {
2006 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
2007 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
2009 MY_CXT.depth = old_depth;
2010 MY_CXT.freed_tokens = NULL;
2014 #endif /* VMG_THREADSAFE */
2021 SV *op_info, *copy_key;
2027 #endif /* MGf_LOCAL */
2030 #endif /* VMG_UVAR */
2031 ) { croak(vmg_wrongargnum); }
2034 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
2035 t = vmg_vtable_vtbl(w->vtable);
2037 VMG_SET_CB(ST(i++), data);
2039 VMG_SET_SVT_CB(ST(i++), get);
2040 VMG_SET_SVT_CB(ST(i++), set);
2041 VMG_SET_SVT_CB(ST(i++), len);
2042 VMG_SET_SVT_CB(ST(i++), clear);
2043 VMG_SET_SVT_CB(ST(i++), free);
2044 VMG_SET_SVT_CB(ST(i++), copy);
2045 /* VMG_SET_SVT_CB(ST(i++), dup); */
2050 VMG_SET_SVT_CB(ST(i++), local);
2051 #endif /* MGf_LOCAL */
2053 VMG_SET_CB(ST(i++), fetch);
2054 VMG_SET_CB(ST(i++), store);
2055 VMG_SET_CB(ST(i++), exists);
2056 VMG_SET_CB(ST(i++), delete);
2059 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
2060 w->uvar = SvTRUE(copy_key) ? 2 : 1;
2061 #endif /* VMG_UVAR */
2063 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
2067 SV *cast(SV *sv, SV *wiz, ...)
2068 PROTOTYPE: \[$@%&*]$@
2070 const vmg_wizard *w = NULL;
2079 wiz = SvRV_const(wiz);
2080 w = vmg_wizard_from_sv(wiz);
2083 croak(vmg_invalid_wiz);
2084 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
2089 getdata(SV *sv, SV *wiz)
2090 PROTOTYPE: \[$@%&*]$
2092 const vmg_wizard *w = NULL;
2096 w = vmg_wizard_from_sv(SvRV_const(wiz));
2098 croak(vmg_invalid_wiz);
2099 data = vmg_data_get(SvRV(sv), w);
2105 SV *dispell(SV *sv, SV *wiz)
2106 PROTOTYPE: \[$@%&*]$
2108 const vmg_wizard *w = NULL;
2111 w = vmg_wizard_from_sv(SvRV_const(wiz));
2113 croak(vmg_invalid_wiz);
2114 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));