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 # ifndef VMG_THREADSAFE
66 # define VMG_THREADSAFE 1
69 # define MY_CXT_CLONE \
71 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
72 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
73 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
76 # undef VMG_THREADSAFE
77 # define VMG_THREADSAFE 0
79 # define dMY_CXT dNOOP
81 # define MY_CXT vmg_globaldata
83 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
85 # define MY_CXT_INIT NOOP
87 # define MY_CXT_CLONE NOOP
91 # define VMG_LOCK(M) MUTEX_LOCK(M)
92 # define VMG_UNLOCK(M) MUTEX_UNLOCK(M)
95 # define VMG_UNLOCK(M)
98 /* --- Compatibility ------------------------------------------------------- */
101 # define Newx(v, n, c) New(0, v, n, c)
105 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
109 # define SvRV_const(sv) SvRV((SV *) sv)
112 #ifndef SvREFCNT_inc_simple_void
113 # define SvREFCNT_inc_simple_void(sv) ((void) SvREFCNT_inc(sv))
117 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
120 #ifndef PERL_MAGIC_ext
121 # define PERL_MAGIC_ext '~'
124 #ifndef PERL_MAGIC_tied
125 # define PERL_MAGIC_tied 'P'
132 #ifndef IN_PERL_COMPILETIME
133 # define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
137 # define VMG_ASSERT(C) assert(C)
139 # define VMG_ASSERT(C)
142 /* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
143 * enable them on 5.10 */
144 #if VMG_HAS_PERL(5, 10, 0)
150 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
151 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
153 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
156 #if VMG_HAS_PERL(5, 17, 4)
157 # define VMG_COMPAT_SCALAR_NOLEN 1
159 # define VMG_COMPAT_SCALAR_NOLEN 0
162 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
163 * reverted to dev-5.11 as 9cdcb38b */
164 #if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
165 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
166 # if VMG_HAS_PERL(5, 11, 0)
167 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
169 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
172 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
173 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
176 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
177 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
179 # ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
180 # define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
184 /* Applied to dev-5.11 as 34908 */
185 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
186 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
188 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
191 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
192 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
193 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
195 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
198 #if VMG_HAS_PERL(5, 11, 0)
199 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
201 # define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
204 #if VMG_HAS_PERL(5, 17, 0)
205 # define VMG_COMPAT_CODE_COPY_CLONE 1
207 # define VMG_COMPAT_CODE_COPY_CLONE 0
210 #if VMG_HAS_PERL(5, 13, 2)
211 # define VMG_COMPAT_GLOB_GET 1
213 # define VMG_COMPAT_GLOB_GET 0
216 #define VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE (VMG_HAS_PERL(5, 10, 0) && !VMG_HAS_PERL(5, 10, 1))
218 /* NewOp() isn't public in perl 5.8.0. */
219 #define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
221 /* ... Bug-free mg_magical ................................................. */
223 /* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
225 #if VMG_HAS_PERL(5, 11, 3)
227 #define vmg_mg_magical(S) mg_magical(S)
231 static void vmg_mg_magical(SV *sv) {
235 if ((mg = SvMAGIC(sv))) {
237 const MGVTBL* const vtbl = mg->mg_virtual;
239 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
246 } while ((mg = mg->mg_moremagic));
247 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
254 /* --- Trampoline ops ------------------------------------------------------ */
256 #define VMG_NEEDS_TRAMPOLINE VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE || VMG_RESET_RMG_NEEDS_TRAMPOLINE
258 #if VMG_NEEDS_TRAMPOLINE
265 static void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
266 t->temp.op_type = OP_STUB;
267 t->temp.op_ppaddr = 0;
268 t->temp.op_next = (OP *) &t->target;
269 t->temp.op_flags = 0;
270 t->temp.op_private = 0;
272 t->target.op_type = OP_STUB;
273 t->target.op_ppaddr = cb;
274 t->target.op_next = NULL;
275 t->target.op_flags = 0;
276 t->target.op_private = 0;
277 t->target.op_sv = NULL;
280 static OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
281 #define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
283 t->temp.op_next = (OP *) &t->target;
285 t->target.op_sv = sv;
286 t->target.op_next = o->op_next;
291 #endif /* VMG_NEEDS_TRAMPOLINE */
293 /* --- Cleaner version of sv_magicext() ------------------------------------ */
295 static MAGIC *vmg_sv_magicext(pTHX_ SV *sv, SV *obj, const MGVTBL *vtbl, const void *ptr, I32 len) {
296 #define vmg_sv_magicext(S, O, V, P, L) vmg_sv_magicext(aTHX_ (S), (O), (V), (P), (L))
299 mg = sv_magicext(sv, obj, PERL_MAGIC_ext, vtbl, ptr, len);
306 mg->mg_flags |= MGf_COPY;
309 mg->mg_flags |= MGf_DUP;
313 mg->mg_flags |= MGf_LOCAL;
314 #endif /* MGf_LOCAL */
316 if (mg->mg_flags & MGf_REFCOUNTED)
322 /* --- Safe version of call_sv() ------------------------------------------- */
324 static I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
325 #define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
327 PERL_CONTEXT saved_cx;
331 old_err = newSVsv(ERRSV);
332 sv_setsv(ERRSV, &PL_sv_undef);
335 cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
336 /* The last popped context will be reused by call_sv(), but our callers may
337 * still need its previous value. Back it up so that it isn't clobbered. */
338 saved_cx = cxstack[cxix];
340 ret = call_sv(sv, flags | G_EVAL);
342 cxstack[cxix] = saved_cx;
345 SvREFCNT_dec(old_err);
347 if (IN_PERL_COMPILETIME) {
350 sv_catsv(PL_errors, ERRSV);
352 Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
355 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
357 ++PL_parser->error_count;
358 #elif defined(PL_error_count)
364 if (!cleanup || cleanup(aTHX_ ud))
369 sv_setsv(ERRSV, old_err);
370 SvREFCNT_dec(old_err);
377 /* --- Stolen chunk of B --------------------------------------------------- */
392 #if VMG_HAS_PERL(5, 21, 5)
395 #if VMG_HAS_PERL(5, 21, 7)
401 static const char *const vmg_opclassnames[] = {
414 #if VMG_HAS_PERL(5, 21, 5)
417 #if VMG_HAS_PERL(5, 21, 7)
423 static opclass vmg_opclass(const OP *o) {
429 if (o->op_type == 0) {
430 #if VMG_HAS_PERL(5, 21, 7)
431 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
434 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
437 if (o->op_type == OP_SASSIGN)
438 return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
440 if (o->op_type == OP_AELEMFAST) {
441 #if PERL_VERSION <= 14
442 if (o->op_flags & OPf_SPECIAL)
454 if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
458 switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
475 case OA_PVOP_OR_SVOP:
476 return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
481 case OA_BASEOP_OR_UNOP:
482 return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
484 return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
486 (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
488 (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
491 if (o->op_flags & OPf_STACKED)
493 else if (o->op_flags & OPf_SPECIAL)
497 #if VMG_HAS_PERL(5, 21, 5)
501 #if VMG_HAS_PERL(5, 21, 7)
510 /* --- Error messages ------------------------------------------------------ */
512 static const char vmg_invalid_wiz[] = "Invalid wizard object";
513 static const char vmg_wrongargnum[] = "Wrong number of arguments";
515 /* --- Context-safe global data -------------------------------------------- */
517 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
520 HV *b__op_stashes[OPc_MAX];
523 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
524 vmg_trampoline propagate_errsv;
526 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
527 vmg_trampoline reset_rmg;
533 /* --- <vmg_vtable> structure ---------------------------------------------- */
542 static vmg_vtable *vmg_vtable_alloc(pTHX) {
543 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
546 t = VOID2(vmg_vtable *, PerlMemShared_malloc(sizeof *t));
548 t->vtbl = VOID2(MGVTBL *, PerlMemShared_malloc(sizeof *t->vtbl));
554 #define vmg_vtable_vtbl(T) (T)->vtbl
556 static perl_mutex vmg_vtable_refcount_mutex;
558 static vmg_vtable *vmg_vtable_dup(pTHX_ vmg_vtable *t) {
559 #define vmg_vtable_dup(T) vmg_vtable_dup(aTHX_ (T))
560 VMG_LOCK(&vmg_vtable_refcount_mutex);
562 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
567 static void vmg_vtable_free(pTHX_ vmg_vtable *t) {
568 #define vmg_vtable_free(T) vmg_vtable_free(aTHX_ (T))
571 VMG_LOCK(&vmg_vtable_refcount_mutex);
572 refcount = --t->refcount;
573 VMG_UNLOCK(&vmg_vtable_refcount_mutex);
576 PerlMemShared_free(t->vtbl);
577 PerlMemShared_free(t);
581 #else /* VMG_THREADSAFE */
583 typedef MGVTBL vmg_vtable;
585 static vmg_vtable *vmg_vtable_alloc(pTHX) {
586 #define vmg_vtable_alloc() vmg_vtable_alloc(aTHX)
589 Newx(t, 1, vmg_vtable);
594 #define vmg_vtable_vtbl(T) ((MGVTBL *) (T))
596 #define vmg_vtable_free(T) Safefree(T)
598 #endif /* !VMG_THREADSAFE */
600 /* --- <vmg_wizard> structure ---------------------------------------------- */
609 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
614 #endif /* MGf_LOCAL */
616 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
617 #endif /* VMG_UVAR */
620 static void vmg_op_info_init(pTHX_ unsigned int opinfo);
622 static vmg_wizard *vmg_wizard_alloc(pTHX_ UV opinfo) {
623 #define vmg_wizard_alloc(O) vmg_wizard_alloc(aTHX_ (O))
626 Newx(w, 1, vmg_wizard);
629 w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
631 vmg_op_info_init(aTHX_ w->opinfo);
633 w->vtable = vmg_vtable_alloc();
638 static void vmg_wizard_free(pTHX_ vmg_wizard *w) {
639 #define vmg_wizard_free(W) vmg_wizard_free(aTHX_ (W))
643 /* During global destruction, any of the callbacks may already have been
644 * freed, so we can't rely on still being able to access them. */
646 SvREFCNT_dec(w->cb_data);
647 SvREFCNT_dec(w->cb_get);
648 SvREFCNT_dec(w->cb_set);
649 SvREFCNT_dec(w->cb_len);
650 SvREFCNT_dec(w->cb_clear);
651 SvREFCNT_dec(w->cb_free);
652 SvREFCNT_dec(w->cb_copy);
654 SvREFCNT_dec(w->cb_dup);
657 SvREFCNT_dec(w->cb_local);
658 #endif /* MGf_LOCAL */
660 SvREFCNT_dec(w->cb_fetch);
661 SvREFCNT_dec(w->cb_store);
662 SvREFCNT_dec(w->cb_exists);
663 SvREFCNT_dec(w->cb_delete);
664 #endif /* VMG_UVAR */
667 /* PerlMemShared_free() and Safefree() are still fine during global
668 * destruction though. */
669 vmg_vtable_free(w->vtable);
677 #define VMG_CLONE_CB(N) \
678 z->cb_ ## N = (w->cb_ ## N) ? SvREFCNT_inc(sv_dup(w->cb_ ## N, params)) \
681 static const vmg_wizard *vmg_wizard_dup(pTHX_ const vmg_wizard *w, CLONE_PARAMS *params) {
682 #define vmg_wizard_dup(W, P) vmg_wizard_dup(aTHX_ (W), (P))
688 Newx(z, 1, vmg_wizard);
690 z->vtable = vmg_vtable_dup(w->vtable);
692 z->opinfo = w->opinfo;
704 #endif /* MGf_LOCAL */
708 VMG_CLONE_CB(exists);
709 VMG_CLONE_CB(delete);
710 #endif /* VMG_UVAR */
715 #endif /* VMG_THREADSAFE */
717 #define vmg_wizard_id(W) PTR2IV(vmg_vtable_vtbl((W)->vtable))
719 /* --- Wizard SV objects --------------------------------------------------- */
721 static int vmg_wizard_sv_free(pTHX_ SV *sv, MAGIC *mg) {
722 vmg_wizard_free((vmg_wizard *) mg->mg_ptr);
729 static int vmg_wizard_sv_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
730 mg->mg_ptr = (char *) vmg_wizard_dup((const vmg_wizard *) mg->mg_ptr, params);
735 #endif /* VMG_THREADSAFE */
737 static MGVTBL vmg_wizard_sv_vtbl = {
742 vmg_wizard_sv_free, /* free */
745 vmg_wizard_sv_dup, /* dup */
751 #endif /* MGf_LOCAL */
754 static SV *vmg_wizard_sv_new(pTHX_ const vmg_wizard *w) {
755 #define vmg_wizard_sv_new(W) vmg_wizard_sv_new(aTHX_ (W))
761 wiz = newSViv(PTR2IV(w));
764 vmg_sv_magicext(wiz, NULL, &vmg_wizard_sv_vtbl, w, 0);
773 #define vmg_sv_has_wizard_type(S) (SvTYPE(S) >= SVt_PVMG)
775 static const vmg_wizard *vmg_wizard_from_sv_nocheck(const SV *wiz) {
778 for (mg = SvMAGIC(wiz); mg; mg = mg->mg_moremagic) {
779 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_virtual == &vmg_wizard_sv_vtbl)
780 return (const vmg_wizard *) mg->mg_ptr;
786 #else /* VMG_THREADSAFE */
788 #define vmg_sv_has_wizard_type(S) SvIOK(S)
790 #define vmg_wizard_from_sv_nocheck(W) INT2PTR(const vmg_wizard *, SvIVX(W))
792 #endif /* !VMG_THREADSAFE */
794 #define vmg_wizard_from_sv(W) (vmg_sv_has_wizard_type(W) ? vmg_wizard_from_sv_nocheck(W) : NULL)
796 static const vmg_wizard *vmg_wizard_from_mg(const MAGIC *mg) {
797 if (mg->mg_type == PERL_MAGIC_ext && mg->mg_len == HEf_SVKEY) {
798 SV *sv = (SV *) mg->mg_ptr;
800 if (vmg_sv_has_wizard_type(sv))
801 return vmg_wizard_from_sv_nocheck(sv);
807 #define vmg_wizard_from_mg_nocheck(M) vmg_wizard_from_sv_nocheck((const SV *) (M)->mg_ptr)
809 /* --- User-level functions implementation --------------------------------- */
811 static const MAGIC *vmg_find(const SV *sv, const vmg_wizard *w) {
815 if (SvTYPE(sv) < SVt_PVMG)
818 wid = vmg_wizard_id(w);
820 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
821 const vmg_wizard *z = vmg_wizard_from_mg(mg);
823 if (z && vmg_wizard_id(z) == wid)
830 /* ... Construct private data .............................................. */
832 static SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
833 #define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
843 EXTEND(SP, items + 1);
844 PUSHs(sv_2mortal(newRV_inc(sv)));
845 for (i = 0; i < items; ++i)
849 vmg_call_sv(ctor, G_SCALAR, 0, NULL);
853 #if VMG_HAS_PERL(5, 8, 3)
854 SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
856 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
866 static SV *vmg_data_get(pTHX_ SV *sv, const vmg_wizard *w) {
867 #define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
868 const MAGIC *mg = vmg_find(sv, w);
870 return mg ? mg->mg_obj : NULL;
873 /* ... Magic cast/dispell .................................................. */
877 static I32 vmg_svt_val(pTHX_ IV, SV *);
880 struct ufuncs new_uf;
881 struct ufuncs old_uf;
884 #endif /* VMG_UVAR */
886 static void vmg_mg_del(pTHX_ SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
887 #define vmg_mg_del(S, P, M, N) vmg_mg_del(aTHX_ (S), (P), (M), (N))
891 prevmagic->mg_moremagic = moremagic;
893 SvMAGIC_set(sv, moremagic);
895 /* Destroy private data */
897 if (mg->mg_type == PERL_MAGIC_uvar) {
898 Safefree(mg->mg_ptr);
900 #endif /* VMG_UVAR */
901 if (mg->mg_obj != sv) {
902 SvREFCNT_dec(mg->mg_obj);
905 /* Unreference the wizard */
906 SvREFCNT_dec((SV *) mg->mg_ptr);
910 #endif /* VMG_UVAR */
913 mg->mg_moremagic = MY_CXT.freed_tokens;
914 MY_CXT.freed_tokens = mg;
916 mg->mg_moremagic = NULL;
921 static int vmg_magic_chain_free(pTHX_ MAGIC *mg, MAGIC *skip) {
922 #define vmg_magic_chain_free(M, S) vmg_magic_chain_free(aTHX_ (M), (S))
926 MAGIC *moremagic = mg->mg_moremagic;
939 static UV vmg_cast(pTHX_ SV *sv, const vmg_wizard *w, const SV *wiz, SV **args, I32 items) {
940 #define vmg_cast(S, W, WIZ, A, I) vmg_cast(aTHX_ (S), (W), (WIZ), (A), (I))
949 oldgmg = SvGMAGICAL(sv);
951 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
953 t = vmg_vtable_vtbl(w->vtable);
954 mg = vmg_sv_magicext(sv, data, t, wiz, HEf_SVKEY);
956 if (SvTYPE(sv) < SVt_PVHV)
959 /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
960 * magic is actually never called for them. If the GMAGICAL flag was off before
961 * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
962 * now on, then this wizard has get magic. Hence we can work around the
963 * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
964 * has uvar callbacks, it will be turned back on later. */
965 if (!oldgmg && SvGMAGICAL(sv))
970 MAGIC *prevmagic, *moremagic = NULL;
973 ud.new_uf.uf_val = vmg_svt_val;
974 ud.new_uf.uf_set = NULL;
975 ud.new_uf.uf_index = 0;
976 ud.old_uf.uf_val = NULL;
977 ud.old_uf.uf_set = NULL;
978 ud.old_uf.uf_index = 0;
980 /* One uvar magic in the chain is enough. */
981 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
982 moremagic = mg->mg_moremagic;
983 if (mg->mg_type == PERL_MAGIC_uvar)
987 if (mg) { /* Found another uvar magic. */
988 struct ufuncs *uf = (struct ufuncs *) mg->mg_ptr;
989 if (uf->uf_val == vmg_svt_val) {
990 /* It's our uvar magic, nothing to do. oldgmg was true. */
993 /* It's another uvar magic, backup it and replace it by ours. */
995 vmg_mg_del(sv, prevmagic, mg, moremagic);
999 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &ud, sizeof(ud));
1001 /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
1002 * handled by our uvar callback. */
1004 #endif /* VMG_UVAR */
1010 static UV vmg_dispell(pTHX_ SV *sv, const vmg_wizard *w) {
1011 #define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
1014 #endif /* VMG_UVAR */
1015 MAGIC *mg, *prevmagic, *moremagic = NULL;
1016 IV wid = vmg_wizard_id(w);
1018 if (SvTYPE(sv) < SVt_PVMG)
1021 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
1022 const vmg_wizard *z;
1024 moremagic = mg->mg_moremagic;
1026 z = vmg_wizard_from_mg(mg);
1028 IV zid = vmg_wizard_id(z);
1032 /* If the current has no uvar, short-circuit uvar deletion. */
1033 uvars = z->uvar ? (uvars + 1) : 0;
1035 } else if (z->uvar) {
1037 /* We can't break here since we need to find the ext magic to delete. */
1039 #else /* VMG_UVAR */
1042 #endif /* !VMG_UVAR */
1048 vmg_mg_del(sv, prevmagic, mg, moremagic);
1051 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
1052 /* mg was the first ext magic in the chain that had uvar */
1054 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
1055 const vmg_wizard *z = vmg_wizard_from_mg(mg);
1066 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
1067 moremagic = mg->mg_moremagic;
1068 if (mg->mg_type == PERL_MAGIC_uvar)
1072 ud = (vmg_uvar_ud *) mg->mg_ptr;
1073 if (ud->old_uf.uf_val || ud->old_uf.uf_set) {
1074 /* Revert the original uvar magic. */
1076 Newx(uf, 1, struct ufuncs);
1079 mg->mg_ptr = (char *) uf;
1080 mg->mg_len = sizeof(*uf);
1082 /* Remove the uvar magic. */
1083 vmg_mg_del(sv, prevmagic, mg, moremagic);
1087 #endif /* VMG_UVAR */
1094 /* ... OP info ............................................................. */
1096 #define VMG_OP_INFO_NAME 1
1097 #define VMG_OP_INFO_OBJECT 2
1100 static perl_mutex vmg_op_name_init_mutex;
1103 static U32 vmg_op_name_init = 0;
1104 static unsigned char vmg_op_name_len[MAXO] = { 0 };
1106 static void vmg_op_info_init(pTHX_ unsigned int opinfo) {
1107 #define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
1109 case VMG_OP_INFO_NAME:
1110 VMG_LOCK(&vmg_op_name_init_mutex);
1111 if (!vmg_op_name_init) {
1113 for (t = 0; t < OP_max; ++t)
1114 vmg_op_name_len[t] = strlen(PL_op_name[t]);
1115 vmg_op_name_init = 1;
1117 VMG_UNLOCK(&vmg_op_name_init_mutex);
1119 case VMG_OP_INFO_OBJECT: {
1121 if (!MY_CXT.b__op_stashes[0]) {
1124 for (c = OPc_NULL; c < OPc_MAX; ++c)
1125 MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
1134 static SV *vmg_op_info(pTHX_ unsigned int opinfo) {
1135 #define vmg_op_info(W) vmg_op_info(aTHX_ (W))
1137 return &PL_sv_undef;
1140 case VMG_OP_INFO_NAME: {
1141 OPCODE t = PL_op->op_type;
1142 return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t]));
1144 case VMG_OP_INFO_OBJECT: {
1146 return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
1147 MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
1153 return &PL_sv_undef;
1156 /* --- svt callbacks ------------------------------------------------------- */
1158 #define VMG_CB_CALL_ARGS_MASK 15
1159 #define VMG_CB_CALL_ARGS_SHIFT 4
1160 #define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) /* 1|2 */
1161 #define VMG_CB_CALL_GUARD 4
1163 static int vmg_dispell_guard_oncroak(pTHX_ void *ud) {
1168 /* If we're at the upmost magic call and we're about to die, we can just free
1169 * the tokens right now, since we will jump past the problematic part of our
1171 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1172 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1173 MY_CXT.freed_tokens = NULL;
1179 static int vmg_dispell_guard_free(pTHX_ SV *sv, MAGIC *mg) {
1180 vmg_magic_chain_free((MAGIC *) mg->mg_ptr, NULL);
1187 static int vmg_dispell_guard_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *params) {
1188 /* The freed magic tokens aren't cloned by perl because it cannot reach them
1189 * (they have been detached from their parent SV when they were enqueued).
1190 * Hence there's nothing to purge in the new thread. */
1196 #endif /* VMG_THREADSAFE */
1198 static MGVTBL vmg_dispell_guard_vtbl = {
1203 vmg_dispell_guard_free, /* free */
1206 vmg_dispell_guard_dup, /* dup */
1212 #endif /* MGf_LOCAL */
1215 static SV *vmg_dispell_guard_new(pTHX_ MAGIC *root) {
1216 #define vmg_dispell_guard_new(R) vmg_dispell_guard_new(aTHX_ (R))
1219 guard = sv_newmortal();
1220 vmg_sv_magicext(guard, NULL, &vmg_dispell_guard_vtbl, root, 0);
1225 static int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
1228 unsigned int i, args, opinfo;
1229 MAGIC **chain = NULL;
1234 args = flags & VMG_CB_CALL_ARGS_MASK;
1235 flags >>= VMG_CB_CALL_ARGS_SHIFT;
1236 opinfo = flags & VMG_CB_CALL_OPINFO;
1242 EXTEND(SP, args + 1);
1243 PUSHs(sv_2mortal(newRV_inc(sv)));
1245 for (i = 0; i < args; ++i) {
1246 SV *sva = va_arg(ap, SV *);
1247 PUSHs(sva ? sva : &PL_sv_undef);
1251 XPUSHs(vmg_op_info(opinfo));
1254 if (flags & VMG_CB_CALL_GUARD) {
1257 vmg_call_sv(cb, G_SCALAR, vmg_dispell_guard_oncroak, NULL);
1259 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens)
1260 chain = &MY_CXT.freed_tokens;
1262 vmg_call_sv(cb, G_SCALAR, 0, NULL);
1268 ret = (int) SvIV(svr);
1278 if (svr && !SvTEMP(svr))
1282 vmg_dispell_guard_new(*chain);
1289 #define VMG_CB_FLAGS(OI, A) \
1290 ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
1292 #define vmg_cb_call1(I, OI, S, A1) \
1293 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
1294 #define vmg_cb_call2(I, OI, S, A1, A2) \
1295 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
1296 #define vmg_cb_call3(I, OI, S, A1, A2, A3) \
1297 vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
1299 /* ... Default no-op magic callback ........................................ */
1301 static int vmg_svt_default_noop(pTHX_ SV *sv, MAGIC *mg) {
1305 /* ... get magic ........................................................... */
1307 static int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
1308 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1310 return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
1313 #define vmg_svt_get_noop vmg_svt_default_noop
1315 /* ... set magic ........................................................... */
1317 static int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
1318 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1320 return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
1323 #define vmg_svt_set_noop vmg_svt_default_noop
1325 /* ... len magic ........................................................... */
1327 static U32 vmg_sv_len(pTHX_ SV *sv) {
1328 #define vmg_sv_len(S) vmg_sv_len(aTHX_ (S))
1330 #if VMG_HAS_PERL(5, 9, 3)
1331 const U8 *s = VOID2(const U8 *, VOID2(const void *, SvPV_const(sv, len)));
1333 U8 *s = SvPV(sv, len);
1336 return DO_UTF8(sv) ? utf8_length(s, s + len) : len;
1339 static U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
1340 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1341 unsigned int opinfo = w->opinfo;
1344 svtype t = SvTYPE(sv);
1353 PUSHs(sv_2mortal(newRV_inc(sv)));
1354 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1356 len = vmg_sv_len(sv);
1358 } else if (t == SVt_PVAV) {
1359 len = av_len((AV *) sv) + 1;
1363 PUSHs(&PL_sv_undef);
1366 XPUSHs(vmg_op_info(opinfo));
1369 vmg_call_sv(w->cb_len, G_SCALAR, 0, NULL);
1373 ret = SvOK(svr) ? (U32) SvUV(svr) : len;
1384 static U32 vmg_svt_len_noop(pTHX_ SV *sv, MAGIC *mg) {
1386 svtype t = SvTYPE(sv);
1389 len = vmg_sv_len(sv);
1390 } else if (t == SVt_PVAV) {
1391 len = (U32) av_len((AV *) sv);
1397 /* ... clear magic ......................................................... */
1399 static int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
1400 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1401 unsigned int flags = w->opinfo;
1403 #if !VMG_HAS_PERL(5, 12, 0)
1404 flags |= VMG_CB_CALL_GUARD;
1407 return vmg_cb_call1(w->cb_clear, flags, sv, mg->mg_obj);
1410 #define vmg_svt_clear_noop vmg_svt_default_noop
1412 /* ... free magic .......................................................... */
1414 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1416 static OP *vmg_pp_propagate_errsv(pTHX) {
1417 SVOP *o = cSVOPx(PL_op);
1420 sv_setsv(ERRSV, o->op_sv);
1421 SvREFCNT_dec(o->op_sv);
1428 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1430 static int vmg_propagate_errsv_free(pTHX_ SV *sv, MAGIC *mg) {
1432 sv_setsv(ERRSV, mg->mg_obj);
1437 /* perl is already kind enough to handle the cloning of the mg_obj member,
1438 hence we don't need to define a dup magic callback. */
1440 static MGVTBL vmg_propagate_errsv_vtbl = {
1445 vmg_propagate_errsv_free, /* free */
1450 #endif /* MGf_LOCAL */
1457 } vmg_svt_free_cleanup_ud;
1459 static int vmg_svt_free_cleanup(pTHX_ void *ud_) {
1460 vmg_svt_free_cleanup_ud *ud = VOID2(vmg_svt_free_cleanup_ud *, ud_);
1463 U32 optype = PL_op ? PL_op->op_type : OP_NULL;
1465 if (optype == OP_LEAVETRY || optype == OP_LEAVEEVAL) {
1466 SV *errsv = newSVsv(ERRSV);
1469 LEAVE_SCOPE(ud->base);
1471 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1472 if (optype == OP_LEAVETRY) {
1474 PL_op = vmg_trampoline_bump(&MY_CXT.propagate_errsv, errsv, PL_op);
1475 } else if (optype == OP_LEAVEEVAL) {
1476 SV *guard = sv_newmortal();
1477 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1479 #else /* !VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1480 # if !VMG_HAS_PERL(5, 8, 9)
1482 SV *guard = sv_newmortal();
1483 vmg_sv_magicext(guard, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1486 vmg_sv_magicext(ERRSV, errsv, &vmg_propagate_errsv_vtbl, NULL, 0);
1488 #endif /* VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE */
1493 /* Don't propagate */
1499 /* We are about to croak() while sv is being destroyed. Try to clean up
1503 vmg_mg_del(sv, NULL, mg, mg->mg_moremagic);
1508 vmg_dispell_guard_oncroak(aTHX_ NULL);
1510 /* After that, propagate the error upwards. */
1515 static int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
1516 vmg_svt_free_cleanup_ud ud;
1517 const vmg_wizard *w;
1523 /* During global destruction, we cannot be sure that the wizard and its free
1524 * callback are still alive. */
1528 w = vmg_wizard_from_mg_nocheck(mg);
1530 /* So that it survives the temp cleanup below */
1531 SvREFCNT_inc_simple_void(sv);
1533 #if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
1534 /* The previous magic tokens were freed but the magic chain wasn't updated, so
1535 * if you access the sv from the callback the old deleted magics will trigger
1536 * and cause memory misreads. Change 32686 solved it that way : */
1537 SvMAGIC_set(sv, mg);
1541 if (cxstack_ix < cxstack_max) {
1542 ud.in_eval = (CxTYPE(cxstack + cxstack_ix + 1) == CXt_EVAL);
1543 ud.base = ud.in_eval ? PL_scopestack[PL_scopestack_ix] : 0;
1554 PUSHs(sv_2mortal(newRV_inc(sv)));
1555 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
1557 XPUSHs(vmg_op_info(w->opinfo));
1563 vmg_call_sv(w->cb_free, G_SCALAR, vmg_svt_free_cleanup, &ud);
1565 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1566 /* Free all the tokens in the chain but the current one (if it's present).
1567 * It will be taken care of by our caller, Perl_mg_free(). */
1568 vmg_magic_chain_free(MY_CXT.freed_tokens, mg);
1569 MY_CXT.freed_tokens = NULL;
1576 ret = (int) SvIV(svr);
1582 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
1583 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
1586 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
1587 * mg->mg_ptr reference count */
1591 #define vmg_svt_free_noop vmg_svt_default_noop
1593 #if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
1594 # define VMG_SVT_COPY_KEYLEN_TYPE I32
1596 # define VMG_SVT_COPY_KEYLEN_TYPE int
1599 /* ... copy magic .......................................................... */
1601 static int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1602 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1606 if (keylen == HEf_SVKEY) {
1609 keysv = newSVpvn(key, keylen);
1612 if (SvTYPE(sv) >= SVt_PVCV)
1613 nsv = sv_2mortal(newRV_inc(nsv));
1615 ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
1617 if (keylen != HEf_SVKEY) {
1618 SvREFCNT_dec(keysv);
1624 static int vmg_svt_copy_noop(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, VMG_SVT_COPY_KEYLEN_TYPE keylen) {
1628 /* ... dup magic ........................................................... */
1631 static int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
1634 #define vmg_svt_dup_noop vmg_svt_dup
1637 /* ... local magic ......................................................... */
1641 static int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
1642 const vmg_wizard *w = vmg_wizard_from_mg_nocheck(mg);
1644 return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
1647 #define vmg_svt_local_noop vmg_svt_default_noop
1649 #endif /* MGf_LOCAL */
1651 /* ... uvar magic .......................................................... */
1655 static OP *vmg_pp_reset_rmg(pTHX) {
1656 SVOP *o = cSVOPx(PL_op);
1658 SvRMAGICAL_on(o->op_sv);
1664 static I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
1666 MAGIC *mg, *umg, *moremagic;
1667 SV *key = NULL, *newkey = NULL;
1670 umg = mg_find(sv, PERL_MAGIC_uvar);
1671 /* umg can't be NULL or we wouldn't be there. */
1673 ud = (vmg_uvar_ud *) umg->mg_ptr;
1675 if (ud->old_uf.uf_val)
1676 ud->old_uf.uf_val(aTHX_ action, sv);
1677 if (ud->old_uf.uf_set)
1678 ud->old_uf.uf_set(aTHX_ action, sv);
1680 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
1681 const vmg_wizard *w;
1683 /* mg may be freed later by the uvar call, so we need to fetch the next
1684 * token before reaching that fateful point. */
1685 moremagic = mg->mg_moremagic;
1687 switch (mg->mg_type) {
1688 case PERL_MAGIC_ext:
1690 case PERL_MAGIC_tied:
1697 w = vmg_wizard_from_mg(mg);
1706 newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
1710 & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)) {
1713 vmg_cb_call2(w->cb_fetch, w->opinfo | VMG_CB_CALL_GUARD, sv,
1716 case HV_FETCH_ISSTORE:
1717 case HV_FETCH_LVALUE:
1718 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
1720 vmg_cb_call2(w->cb_store, w->opinfo | VMG_CB_CALL_GUARD, sv,
1723 case HV_FETCH_ISEXISTS:
1725 vmg_cb_call2(w->cb_exists, w->opinfo | VMG_CB_CALL_GUARD, sv,
1730 vmg_cb_call2(w->cb_delete, w->opinfo | VMG_CB_CALL_GUARD, sv,
1736 if (SvRMAGICAL(sv) && !tied && !(action & (HV_FETCH_ISSTORE|HV_DELETE))) {
1737 /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
1738 * mistaken for a tied hash by the rest of hv_common. It will be reset by
1739 * the op_ppaddr of a new fake op injected between the current and the next
1742 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1746 PL_op = vmg_trampoline_bump(&MY_CXT.reset_rmg, sv, PL_op);
1748 #else /* !VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1750 OP *nop = PL_op->op_next;
1753 if (nop && nop->op_ppaddr == vmg_pp_reset_rmg) {
1754 svop = (SVOP *) nop;
1756 NewOp(1101, svop, 1, SVOP);
1757 svop->op_type = OP_STUB;
1758 svop->op_ppaddr = vmg_pp_reset_rmg;
1759 svop->op_next = nop;
1761 svop->op_private = 0;
1763 PL_op->op_next = (OP *) svop;
1768 #endif /* VMG_RESET_RMG_NEEDS_TRAMPOLINE */
1776 #endif /* VMG_UVAR */
1778 /* --- Module setup/teardown ----------------------------------------------- */
1782 static I32 vmg_loaded = 0;
1784 /* We must use preexistent global mutexes or we will never be able to destroy
1786 # if VMG_HAS_PERL(5, 9, 3)
1787 # define VMG_LOADED_LOCK MUTEX_LOCK(&PL_my_ctx_mutex)
1788 # define VMG_LOADED_UNLOCK MUTEX_UNLOCK(&PL_my_ctx_mutex)
1790 # define VMG_LOADED_LOCK OP_REFCNT_LOCK
1791 # define VMG_LOADED_UNLOCK OP_REFCNT_UNLOCK
1794 static void vmg_global_teardown_late_locked(pTHX) {
1795 #define vmg_global_teardown_late_locked() vmg_global_teardown_late_locked(aTHX)
1796 MUTEX_DESTROY(&vmg_op_name_init_mutex);
1797 MUTEX_DESTROY(&vmg_vtable_refcount_mutex);
1802 static int vmg_global_teardown_free(pTHX_ SV *sv, MAGIC *mg) {
1805 if (vmg_loaded == 0)
1806 vmg_global_teardown_late_locked();
1813 static MGVTBL vmg_global_teardown_vtbl = {
1818 vmg_global_teardown_free
1830 static signed char vmg_destruct_level(pTHX) {
1831 #define vmg_destruct_level() vmg_destruct_level(aTHX)
1834 lvl = PL_perl_destruct_level;
1838 const char *s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1841 #if VMG_HAS_PERL(5, 21, 3)
1842 if (strEQ(s, "-1")) {
1845 # if VMG_HAS_PERL(5, 21, 10)
1847 if (Perl_grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
1851 # else /* VMG_HAS_PERL(5, 21, 3) && !VMG_HAS_PERL(5, 21, 10) */
1852 i = Perl_grok_atou(s, NULL);
1855 #else /* !VMG_HAS_PERL(5, 21, 3) */
1867 #endif /* VMG_THREADSAFE */
1869 static void vmg_teardown(pTHX_ void *param) {
1875 if (vmg_loaded == 1) {
1877 if (vmg_destruct_level() == 0) {
1878 vmg_global_teardown_late_locked();
1881 PL_strtab = newHV();
1882 vmg_sv_magicext((SV *) PL_strtab, NULL, &vmg_global_teardown_vtbl, NULL, 0);
1885 VMG_ASSERT(vmg_loaded > 1);
1892 if (MY_CXT.depth == 0 && MY_CXT.freed_tokens) {
1893 vmg_magic_chain_free(MY_CXT.freed_tokens, NULL);
1894 MY_CXT.freed_tokens = NULL;
1900 static void vmg_setup(pTHX) {
1901 #define vmg_setup() vmg_setup(aTHX)
1909 if (vmg_loaded == 0) {
1910 MUTEX_INIT(&vmg_vtable_refcount_mutex);
1911 MUTEX_INIT(&vmg_op_name_init_mutex);
1914 VMG_ASSERT(vmg_loaded > 0);
1921 for (c = OPc_NULL; c < OPc_MAX; ++c)
1922 MY_CXT.b__op_stashes[c] = NULL;
1925 MY_CXT.freed_tokens = NULL;
1927 #if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
1928 vmg_trampoline_init(&MY_CXT.propagate_errsv, vmg_pp_propagate_errsv);
1930 #if VMG_RESET_RMG_NEEDS_TRAMPOLINE
1931 vmg_trampoline_init(&MY_CXT.reset_rmg, vmg_pp_reset_rmg);
1934 stash = gv_stashpv(__PACKAGE__, 1);
1935 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
1936 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
1937 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
1938 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
1939 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
1940 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
1941 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
1942 newSVuv(VMG_COMPAT_SCALAR_NOLEN));
1943 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
1944 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
1945 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
1946 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
1947 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
1948 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
1949 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
1950 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
1951 newCONSTSUB(stash, "VMG_COMPAT_HASH_DELETE_NOUVAR_VOID",
1952 newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
1953 newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
1954 newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
1955 newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
1956 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
1957 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
1958 newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
1959 newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
1960 newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
1962 call_atexit(vmg_teardown, NULL);
1967 /* --- Macros for the XS section ------------------------------------------- */
1970 # define VMG_CVOK(C) \
1971 ((CvISXSUB(C) ? (void *) CvXSUB(C) : (void *) CvROOT(C)) ? 1 : 0)
1973 # define VMG_CVOK(C) (CvROOT(C) || CvXSUB(C))
1976 #define VMG_CBOK(S) ((SvTYPE(S) == SVt_PVCV) ? VMG_CVOK(S) : SvOK(S))
1978 #define VMG_SET_CB(S, N) { \
1980 if (SvOK(cb) && SvROK(cb)) { \
1983 SvREFCNT_inc_simple_void(cb); \
1992 #define VMG_SET_SVT_CB(S, N) { \
1994 if (SvOK(cb) && SvROK(cb)) { \
1996 if (VMG_CBOK(cb)) { \
1997 t->svt_ ## N = vmg_svt_ ## N; \
1998 SvREFCNT_inc_simple_void(cb); \
2000 t->svt_ ## N = vmg_svt_ ## N ## _noop; \
2004 t->svt_ ## N = NULL; \
2010 /* --- XS ------------------------------------------------------------------ */
2012 MODULE = Variable::Magic PACKAGE = Variable::Magic
2027 U32 had_b__op_stash = 0;
2033 for (c = OPc_NULL; c < OPc_MAX; ++c) {
2034 if (MY_CXT.b__op_stashes[c])
2035 had_b__op_stash |= (((U32) 1) << c);
2037 old_depth = MY_CXT.depth;
2041 for (c = OPc_NULL; c < OPc_MAX; ++c) {
2042 MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
2043 ? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
2045 MY_CXT.depth = old_depth;
2046 MY_CXT.freed_tokens = NULL;
2048 VMG_ASSERT(vmg_loaded > 0);
2054 #endif /* VMG_THREADSAFE */
2061 SV *op_info, *copy_key;
2067 #endif /* MGf_LOCAL */
2070 #endif /* VMG_UVAR */
2071 ) { croak(vmg_wrongargnum); }
2074 w = vmg_wizard_alloc(SvOK(op_info) ? SvUV(op_info) : 0);
2075 t = vmg_vtable_vtbl(w->vtable);
2077 VMG_SET_CB(ST(i++), data);
2079 VMG_SET_SVT_CB(ST(i++), get);
2080 VMG_SET_SVT_CB(ST(i++), set);
2081 VMG_SET_SVT_CB(ST(i++), len);
2082 VMG_SET_SVT_CB(ST(i++), clear);
2083 VMG_SET_SVT_CB(ST(i++), free);
2084 VMG_SET_SVT_CB(ST(i++), copy);
2085 /* VMG_SET_SVT_CB(ST(i++), dup); */
2090 VMG_SET_SVT_CB(ST(i++), local);
2091 #endif /* MGf_LOCAL */
2093 VMG_SET_CB(ST(i++), fetch);
2094 VMG_SET_CB(ST(i++), store);
2095 VMG_SET_CB(ST(i++), exists);
2096 VMG_SET_CB(ST(i++), delete);
2099 if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
2100 w->uvar = SvTRUE(copy_key) ? 2 : 1;
2101 #endif /* VMG_UVAR */
2103 RETVAL = newRV_noinc(vmg_wizard_sv_new(w));
2107 SV *cast(SV *sv, SV *wiz, ...)
2108 PROTOTYPE: \[$@%&*]$@
2110 const vmg_wizard *w = NULL;
2119 wiz = SvRV_const(wiz);
2120 w = vmg_wizard_from_sv(wiz);
2123 croak(vmg_invalid_wiz);
2124 RETVAL = newSVuv(vmg_cast(SvRV(sv), w, wiz, args, i));
2129 getdata(SV *sv, SV *wiz)
2130 PROTOTYPE: \[$@%&*]$
2132 const vmg_wizard *w = NULL;
2136 w = vmg_wizard_from_sv(SvRV_const(wiz));
2138 croak(vmg_invalid_wiz);
2139 data = vmg_data_get(SvRV(sv), w);
2145 SV *dispell(SV *sv, SV *wiz)
2146 PROTOTYPE: \[$@%&*]$
2148 const vmg_wizard *w = NULL;
2151 w = vmg_wizard_from_sv(SvRV_const(wiz));
2153 croak(vmg_invalid_wiz);
2154 RETVAL = newSVuv(vmg_dispell(SvRV(sv), w));