1 /* This file is part of the Lexical-Types Perl module.
2 * See http://search.cpan.org/dist/Lexical-Types/ */
4 #define PERL_NO_GET_CONTEXT
9 #define __PACKAGE__ "Lexical::Types"
10 #define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
12 /* --- Compatibility wrappers ---------------------------------------------- */
14 #define LT_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
16 #if LT_HAS_PERL(5, 10, 0) || defined(PL_parser)
17 # ifndef PL_in_my_stash
18 # define PL_in_my_stash PL_parser->in_my_stash
21 # ifndef PL_in_my_stash
22 # define PL_in_my_stash PL_Iin_my_stash
26 #ifndef LT_WORKAROUND_REQUIRE_PROPAGATION
27 # define LT_WORKAROUND_REQUIRE_PROPAGATION !LT_HAS_PERL(5, 10, 1)
31 # define LT_HAS_RPEEP LT_HAS_PERL(5, 13, 5)
35 # define HvNAME_get(H) HvNAME(H)
39 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
44 # define OpSIBLING(O) OP_SIBLING(O)
46 # define OpSIBLING(O) ((O)->op_sibling)
50 #ifndef SvREFCNT_inc_simple_void_NN
51 # define SvREFCNT_inc_simple_void_NN(S) ((void) SvREFCNT_inc(S))
55 # define LT_ASSERT(C) assert(C)
60 /* ... Thread safety and multiplicity ...................................... */
62 /* Safe unless stated otherwise in Makefile.PL */
64 # define LT_FORKSAFE 1
67 #ifndef LT_MULTIPLICITY
68 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
69 # define LT_MULTIPLICITY 1
71 # define LT_MULTIPLICITY 0
76 # define tTHX PerlInterpreter*
79 #if LT_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))
80 # define LT_THREADSAFE 1
82 # define MY_CXT_CLONE \
84 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
85 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
86 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
89 # define LT_THREADSAFE 0
91 # define dMY_CXT dNOOP
93 # define MY_CXT lt_globaldata
95 # define START_MY_CXT static my_cxt_t MY_CXT;
97 # define MY_CXT_INIT NOOP
99 # define MY_CXT_CLONE NOOP
111 /* We must use preexistent global mutexes or we will never be able to destroy
113 # if LT_HAS_PERL(5, 9, 3)
114 # define LT_LOADED_LOCK MUTEX_LOCK(&PL_my_ctx_mutex)
115 # define LT_LOADED_UNLOCK MUTEX_UNLOCK(&PL_my_ctx_mutex)
117 # define LT_LOADED_LOCK OP_REFCNT_LOCK
118 # define LT_LOADED_UNLOCK OP_REFCNT_UNLOCK
121 # define LT_LOADED_LOCK NOOP
122 # define LT_LOADED_UNLOCK NOOP
125 #if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK)
126 # define LT_CHECK_LOCK OP_CHECK_MUTEX_LOCK
127 # define LT_CHECK_UNLOCK OP_CHECK_MUTEX_UNLOCK
128 #elif LT_HAS_PERL(5, 9, 3)
129 # define LT_CHECK_LOCK OP_REFCNT_LOCK
130 # define LT_CHECK_UNLOCK OP_REFCNT_UNLOCK
132 /* Before perl 5.9.3, lt_ck_*() calls are already protected by the LT_LOADED
133 * mutex, which falls back to the OP_REFCNT mutex. Make sure we don't lock it
135 # define LT_CHECK_LOCK NOOP
136 # define LT_CHECK_UNLOCK NOOP
139 typedef OP *(*lt_ck_t)(pTHX_ OP *);
141 #ifdef wrap_op_checker
143 # define lt_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP))
147 static void lt_ck_replace(pTHX_ OPCODE type, lt_ck_t new_ck, lt_ck_t *old_ck_p){
148 #define lt_ck_replace(T, NC, OCP) lt_ck_replace(aTHX_ (T), (NC), (OCP))
151 *old_ck_p = PL_check[type];
152 PL_check[type] = new_ck;
159 static void lt_ck_restore(pTHX_ OPCODE type, lt_ck_t *old_ck_p) {
160 #define lt_ck_restore(T, OCP) lt_ck_restore(aTHX_ (T), (OCP))
163 PL_check[type] = *old_ck_p;
169 /* --- Helpers ------------------------------------------------------------- */
171 /* ... Check if the module is loaded ....................................... */
173 static I32 lt_loaded = 0;
177 #define PTABLE_NAME ptable_loaded
178 #define PTABLE_NEED_DELETE 1
179 #define PTABLE_NEED_WALK 0
183 #define ptable_loaded_store(T, K, V) ptable_loaded_store(aPTBLMS_ (T), (K), (V))
184 #define ptable_loaded_delete(T, K) ptable_loaded_delete(aPTBLMS_ (T), (K))
185 #define ptable_loaded_free(T) ptable_loaded_free(aPTBLMS_ (T))
187 static ptable *lt_loaded_cxts = NULL;
191 static int lt_is_loaded(pTHX_ void *cxt) {
192 #define lt_is_loaded(C) lt_is_loaded(aTHX_ (C))
196 if (lt_loaded_cxts && ptable_fetch(lt_loaded_cxts, cxt))
203 #endif /* DEBUGGING */
205 static int lt_set_loaded_locked(pTHX_ void *cxt) {
206 #define lt_set_loaded_locked(C) lt_set_loaded_locked(aTHX_ (C))
207 int global_setup = 0;
209 if (lt_loaded <= 0) {
210 LT_ASSERT(lt_loaded == 0);
211 LT_ASSERT(!lt_loaded_cxts);
212 lt_loaded_cxts = ptable_new();
216 LT_ASSERT(lt_loaded_cxts);
217 ptable_loaded_store(lt_loaded_cxts, cxt, cxt);
222 static int lt_clear_loaded_locked(pTHX_ void *cxt) {
223 #define lt_clear_loaded_locked(C) lt_clear_loaded_locked(aTHX_ (C))
224 int global_teardown = 0;
227 LT_ASSERT(lt_loaded_cxts);
228 ptable_loaded_delete(lt_loaded_cxts, cxt);
230 } else if (lt_loaded_cxts) {
231 LT_ASSERT(lt_loaded == 1);
232 ptable_loaded_free(lt_loaded_cxts);
233 lt_loaded_cxts = NULL;
238 return global_teardown;
243 #define lt_is_loaded(C) (lt_loaded > 0)
244 #define lt_set_loaded_locked(C) ((lt_loaded++ <= 0) ? 1 : 0)
245 #define lt_clear_loaded_locked(C) ((--lt_loaded <= 0) ? 1 : 0)
249 /* ... Thread-safe hints ................................................... */
251 #if LT_WORKAROUND_REQUIRE_PROPAGATION
258 #define LT_HINT_STRUCT 1
260 #define LT_HINT_CODE(H) ((H)->code)
262 #define LT_HINT_FREE(H) { \
263 lt_hint_t *h = (H); \
264 SvREFCNT_dec(h->code); \
265 PerlMemShared_free(h); \
268 #else /* LT_WORKAROUND_REQUIRE_PROPAGATION */
270 typedef SV lt_hint_t;
272 #define LT_HINT_STRUCT 0
274 #define LT_HINT_CODE(H) (H)
276 #define LT_HINT_FREE(H) SvREFCNT_dec(H);
278 #endif /* !LT_WORKAROUND_REQUIRE_PROPAGATION */
282 #define PTABLE_NAME ptable_hints
283 #define PTABLE_VAL_FREE(V) LT_HINT_FREE(V)
284 #define PTABLE_NEED_DELETE 0
285 #define PTABLE_NEED_WALK 1
294 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
295 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
297 #endif /* LT_THREADSAFE */
299 /* ... "Seen" pointer table ................................................ */
301 #define PTABLE_NAME ptable_seen
302 #define PTABLE_NEED_DELETE 0
303 #define PTABLE_NEED_WALK 0
307 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
308 #define ptable_seen_store(T, K, V) ptable_seen_store(aPTBLMS_ (T), (K), (V))
309 #define ptable_seen_clear(T) ptable_seen_clear(aPTBLMS_ (T))
310 #define ptable_seen_free(T) ptable_seen_free(aPTBLMS_ (T))
312 /* ... Global data ......................................................... */
314 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
318 ptable *seen; /* It really is a ptable_seen */
320 ptable *tbl; /* It really is a ptable_hints */
328 /* ... Cloning global data ................................................. */
334 #if LT_HAS_PERL(5, 13, 2)
335 CLONE_PARAMS *params;
339 } lt_ptable_clone_ud;
341 #if LT_HAS_PERL(5, 13, 2)
342 # define lt_ptable_clone_ud_init(U, T, O) \
344 (U).params = Perl_clone_params_new((O), aTHX)
345 # define lt_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
346 # define lt_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
348 # define lt_ptable_clone_ud_init(U, T, O) \
350 (U).params.stashes = newAV(); \
351 (U).params.flags = 0; \
352 (U).params.proto_perl = (O)
353 # define lt_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
354 # define lt_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
357 static void lt_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
358 lt_ptable_clone_ud *ud = ud_;
359 lt_hint_t *h1 = ent->val;
364 h2 = PerlMemShared_malloc(sizeof *h2);
365 h2->code = lt_dup_inc(h1->code, ud);
366 #if LT_WORKAROUND_REQUIRE_PROPAGATION
367 h2->require_tag = PTR2IV(lt_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
370 #else /* LT_HINT_STRUCT */
372 h2 = lt_dup_inc(h1, ud);
374 #endif /* !LT_HINT_STRUCT */
376 ptable_hints_store(ud->tbl, ent->key, h2);
379 #endif /* LT_THREADSAFE */
381 /* ... Hint tags ........................................................... */
383 #if LT_WORKAROUND_REQUIRE_PROPAGATION
385 static IV lt_require_tag(pTHX) {
386 #define lt_require_tag() lt_require_tag(aTHX)
387 const CV *cv, *outside;
392 /* If for some reason the pragma is operational at run-time, try to discover
393 * the current cv in use. */
396 for (si = PL_curstackinfo; si; si = si->si_prev) {
399 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
400 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
402 switch (CxTYPE(cx)) {
405 /* The propagation workaround is only needed up to 5.10.0 and at that
406 * time format and sub contexts were still identical. And even later the
407 * cv members offsets should have been kept the same. */
409 goto get_enclosing_cv;
411 cv = cx->blk_eval.cv;
412 goto get_enclosing_cv;
423 for (outside = CvOUTSIDE(cv); outside; outside = CvOUTSIDE(cv))
429 #endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
431 static SV *lt_tag(pTHX_ SV *value) {
432 #define lt_tag(V) lt_tag(aTHX_ (V))
440 #endif /* LT_THREADSAFE */
444 if (SvTYPE(value) >= SVt_PVCV) {
446 SvREFCNT_inc_simple_void_NN(code);
451 h = PerlMemShared_malloc(sizeof *h);
453 # if LT_WORKAROUND_REQUIRE_PROPAGATION
454 h->require_tag = lt_require_tag();
455 # endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
456 #else /* LT_HINT_STRUCT */
458 #endif /* !LT_HINT_STRUCT */
461 /* We only need for the key to be an unique tag for looking up the value later
462 * Allocated memory provides convenient unique identifiers, so that's why we
463 * use the hint as the key itself. */
464 ptable_hints_store(MY_CXT.tbl, h, h);
465 #endif /* LT_THREADSAFE */
467 return newSViv(PTR2IV(h));
470 static SV *lt_detag(pTHX_ const SV *hint) {
471 #define lt_detag(H) lt_detag(aTHX_ (H))
478 #endif /* LT_THREADSAFE */
480 if (!(hint && SvIOK(hint)))
483 h = INT2PTR(lt_hint_t *, SvIVX(hint));
485 h = ptable_fetch(MY_CXT.tbl, h);
486 #endif /* LT_THREADSAFE */
487 #if LT_WORKAROUND_REQUIRE_PROPAGATION
488 if (lt_require_tag() != h->require_tag)
490 #endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
492 return LT_HINT_CODE(h);
495 static VOL U32 lt_hash = 0;
497 static SV *lt_hint(pTHX) {
498 #define lt_hint() lt_hint(aTHX)
500 #ifdef cop_hints_fetch_pvn
501 hint = cop_hints_fetch_pvn(PL_curcop, __PACKAGE__, __PACKAGE_LEN__, lt_hash,0);
502 #elif LT_HAS_PERL(5, 9, 5)
503 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
505 __PACKAGE__, __PACKAGE_LEN__,
509 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
514 return lt_detag(hint);
517 /* ... op => info map ...................................................... */
519 #define PTABLE_NAME ptable_map
520 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
521 #define PTABLE_NEED_DELETE 1
522 #define PTABLE_NEED_WALK 0
526 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
527 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
528 #define ptable_map_delete(T, K) ptable_map_delete(aPTBLMS_ (T), (K))
532 static perl_mutex lt_op_map_mutex;
534 #define LT_LOCK(M) MUTEX_LOCK(M)
535 #define LT_UNLOCK(M) MUTEX_UNLOCK(M)
537 #else /* USE_ITHREADS */
542 #endif /* !USE_ITHREADS */
544 static ptable *lt_op_padxv_map = NULL;
549 STRLEN buf_size, orig_pkg_len, type_pkg_len, type_meth_len;
551 #else /* MULTIPLICITY */
555 #endif /* !MULTIPLICITY */
558 static void lt_op_padxv_info_call(pTHX_ const lt_op_padxv_info *oi, SV *sv) {
559 #define lt_op_padxv_info_call(O, S) lt_op_padxv_info_call(aTHX_ (O), (S))
560 SV *orig_pkg, *type_pkg, *type_meth;
569 STRLEN op_len = oi->orig_pkg_len, tp_len = oi->type_pkg_len;
571 orig_pkg = sv_2mortal(newSVpvn(buf, op_len));
572 SvREADONLY_on(orig_pkg);
574 type_pkg = sv_2mortal(newSVpvn(buf, tp_len));
575 SvREADONLY_on(type_pkg);
577 type_meth = sv_2mortal(newSVpvn(buf, oi->type_meth_len));
578 SvREADONLY_on(type_meth);
580 #else /* MULTIPLICITY */
581 orig_pkg = oi->orig_pkg;
582 type_pkg = oi->type_pkg;
583 type_meth = oi->type_meth;
584 #endif /* !MULTIPLICITY */
593 items = call_sv(type_meth, G_ARRAY | G_METHOD);
603 croak("Typed scalar initializer method should return zero or one scalar, but got %d", items);
613 static void lt_padxv_map_store(pTHX_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*old_pp)(pTHX)) {
614 #define lt_padxv_map_store(O, OP, TP, TM, PP) lt_padxv_map_store(aTHX_ (O), (OP), (TP), (TM), (PP))
615 lt_op_padxv_info *oi;
617 LT_LOCK(<_op_map_mutex);
619 if (!(oi = ptable_fetch(lt_op_padxv_map, o))) {
620 oi = PerlMemShared_malloc(sizeof *oi);
621 ptable_map_store(lt_op_padxv_map, o, oi);
625 #else /* MULTIPLICITY */
627 SvREFCNT_dec(oi->orig_pkg);
628 SvREFCNT_dec(oi->type_pkg);
629 SvREFCNT_dec(oi->type_meth);
630 #endif /* !MULTIPLICITY */
635 STRLEN op_len = SvCUR(orig_pkg);
636 STRLEN tp_len = SvCUR(type_pkg);
637 STRLEN tm_len = SvCUR(type_meth);
638 STRLEN new_buf_size = op_len + tp_len + tm_len;
640 if (new_buf_size > oi->buf_size) {
641 PerlMemShared_free(oi->buf);
642 oi->buf = PerlMemShared_malloc(new_buf_size);
643 oi->buf_size = new_buf_size;
646 Copy(SvPVX(orig_pkg), buf, op_len, char);
648 Copy(SvPVX(type_pkg), buf, tp_len, char);
650 Copy(SvPVX(type_meth), buf, tm_len, char);
651 oi->orig_pkg_len = op_len;
652 oi->type_pkg_len = tp_len;
653 oi->type_meth_len = tm_len;
654 SvREFCNT_dec(orig_pkg);
655 SvREFCNT_dec(type_pkg);
656 SvREFCNT_dec(type_meth);
658 #else /* MULTIPLICITY */
659 oi->orig_pkg = orig_pkg;
660 oi->type_pkg = type_pkg;
661 oi->type_meth = type_meth;
662 #endif /* !MULTIPLICITY */
666 LT_UNLOCK(<_op_map_mutex);
669 static const lt_op_padxv_info *lt_padxv_map_fetch(const OP *o, lt_op_padxv_info *oi) {
670 const lt_op_padxv_info *val;
672 LT_LOCK(<_op_map_mutex);
674 val = ptable_fetch(lt_op_padxv_map, o);
680 LT_UNLOCK(<_op_map_mutex);
685 #if LT_HAS_PERL(5, 17, 6)
687 static ptable *lt_op_padrange_map = NULL;
691 const OP *padxv_start;
692 } lt_op_padrange_info;
694 static void lt_padrange_map_store(pTHX_ const OP *o, const OP *s, OP *(*old_pp)(pTHX)) {
695 #define lt_padrange_map_store(O, S, PP) lt_padrange_map_store(aTHX_ (O), (S), (PP))
696 lt_op_padrange_info *oi;
698 LT_LOCK(<_op_map_mutex);
700 if (!(oi = ptable_fetch(lt_op_padrange_map, o))) {
701 oi = PerlMemShared_malloc(sizeof *oi);
702 ptable_map_store(lt_op_padrange_map, o, oi);
708 LT_UNLOCK(<_op_map_mutex);
711 static const lt_op_padrange_info *lt_padrange_map_fetch(const OP *o, lt_op_padrange_info *oi) {
712 const lt_op_padrange_info *val;
714 LT_LOCK(<_op_map_mutex);
716 val = ptable_fetch(lt_op_padrange_map, o);
722 LT_UNLOCK(<_op_map_mutex);
729 static void lt_map_delete(pTHX_ const OP *o) {
730 #define lt_map_delete(O) lt_map_delete(aTHX_ (O))
731 LT_LOCK(<_op_map_mutex);
733 ptable_map_delete(lt_op_padxv_map, o);
734 #if LT_HAS_PERL(5, 17, 6)
735 ptable_map_delete(lt_op_padrange_map, o);
738 LT_UNLOCK(<_op_map_mutex);
741 /* --- Hooks --------------------------------------------------------------- */
743 /* ... Our pp_padsv ........................................................ */
745 static OP *lt_pp_padsv(pTHX) {
748 if (lt_padxv_map_fetch(PL_op, &oi)) {
750 lt_op_padxv_info_call(&oi, TARG);
751 return oi.old_pp(aTHX);
754 return PL_op->op_ppaddr(aTHX);
757 /* ... Our pp_padrange (on perl 5.17.6 and above) .......................... */
759 #if LT_HAS_PERL(5, 17, 6)
761 static OP *lt_pp_padrange(pTHX) {
762 lt_op_padrange_info roi;
764 if (lt_padrange_map_fetch(PL_op, &roi)) {
765 PADOFFSET i, base, count;
768 base = PL_op->op_targ;
769 count = PL_op->op_private & OPpPADRANGE_COUNTMASK;
771 for (i = 0, p = roi.padxv_start; i < count && p; ++i, p = p->op_next) {
772 while (p->op_type == OP_NULL)
775 if (p->op_type == OP_PADSV && lt_padxv_map_fetch(p, &oi))
776 lt_op_padxv_info_call(&oi, PAD_SV(base + i));
779 return roi.old_pp(aTHX);
782 return PL_op->op_ppaddr(aTHX);
787 /* ... Our ck_pad{any,sv} .................................................. */
789 /* Sadly, the padsv OPs we are interested in don't trigger the padsv check
790 * function, but are instead manually mutated from a padany. So we store
791 * the op entry in the op map in the padany check function, and we set their
792 * op_ppaddr member in our peephole optimizer replacement below. */
794 static OP *(*lt_old_ck_padany)(pTHX_ OP *) = 0;
796 static OP *lt_ck_padany(pTHX_ OP *o) {
800 o = lt_old_ck_padany(aTHX_ o);
802 stash = PL_in_my_stash;
803 if (stash && (code = lt_hint())) {
805 SV *orig_pkg = newSVpvn(HvNAME_get(stash), HvNAMELEN_get(stash));
806 SV *orig_meth = MY_CXT.default_meth; /* Guarded by lt_hint() */
808 SV *type_meth = NULL;
813 SvREADONLY_on(orig_pkg);
824 items = call_sv(code, G_ARRAY);
828 croak(__PACKAGE__ " mangler should return zero, one or two scalars, but got %d", items);
830 SvREFCNT_dec(orig_pkg);
839 type_meth = newSVsv(rsv);
840 SvREADONLY_on(type_meth);
845 type_pkg = newSVsv(rsv);
846 SvREADONLY_on(type_pkg);
856 SvREFCNT_inc_simple_void_NN(orig_pkg);
860 type_meth = orig_meth;
861 SvREFCNT_inc_simple_void_NN(orig_meth);
864 lt_padxv_map_store(o, orig_pkg, type_pkg, type_meth, o->op_ppaddr);
873 static OP *(*lt_old_ck_padsv)(pTHX_ OP *) = 0;
875 static OP *lt_ck_padsv(pTHX_ OP *o) {
878 return lt_old_ck_padsv(aTHX_ o);
881 /* ... Our peephole optimizer .............................................. */
883 #if LT_HAS_PERL(5, 17, 6)
885 static int lt_maybe_padrange_setup(pTHX_ OP *o, const OP *start) {
886 #define lt_maybe_padrange_setup(O, S) lt_maybe_padrange_setup(aTHX_ (O), (S))
890 count = o->op_private & OPpPADRANGE_COUNTMASK;
892 for (i = 0, p = start; i < count && p; ++i, p = p->op_next) {
893 if (p->op_type == OP_PADSV) {
894 /* In a padrange sequence, either all lexicals are typed, or none are.
895 * Thus we can stop at the first padsv op. However, note that these
896 * lexicals can need to call different methods in different packages. */
897 LT_LOCK(<_op_map_mutex);
898 if (ptable_fetch(lt_op_padxv_map, p)) {
899 LT_UNLOCK(<_op_map_mutex);
900 lt_padrange_map_store(o, start, o->op_ppaddr);
901 o->op_ppaddr = lt_pp_padrange;
903 LT_UNLOCK(<_op_map_mutex);
914 static void lt_peep_rec(pTHX_ OP *o, ptable *seen) {
915 #define lt_peep_rec(O) lt_peep_rec(aTHX_ (O), seen)
916 for (; o; o = o->op_next) {
917 if (ptable_fetch(seen, o))
919 ptable_seen_store(seen, o, o);
921 switch (o->op_type) {
923 if (o->op_ppaddr != lt_pp_padsv && o->op_private & OPpLVAL_INTRO) {
924 lt_op_padxv_info *oi;
925 LT_LOCK(<_op_map_mutex);
926 oi = ptable_fetch(lt_op_padxv_map, o);
928 oi->old_pp = o->op_ppaddr;
929 o->op_ppaddr = lt_pp_padsv;
931 LT_UNLOCK(<_op_map_mutex);
934 #if LT_HAS_PERL(5, 17, 6)
936 /* We deal with special padrange ops later, in the aassign op they belong
938 if (o->op_ppaddr != lt_pp_padrange && o->op_private & OPpLVAL_INTRO
939 && !(o->op_flags & OPf_SPECIAL)) {
940 /* A padrange op is guaranteed to have previously been a pushmark.
941 * Moreover, for non-special padrange ops (i.e. that aren't for
942 * my (...) = @_), the first original padxv is its sibling or nephew.
944 OP *kid = OpSIBLING(o);
945 if (kid->op_type == OP_NULL && kid->op_flags & OPf_KIDS) {
946 kid = kUNOP->op_first;
947 if (kid->op_type == OP_NULL)
948 kid = OpSIBLING(kid);
950 lt_maybe_padrange_setup(o, kid);
955 if (cBINOPo->op_first && cBINOPo->op_first->op_flags & OPf_KIDS
956 && (op = cUNOPx(cBINOPo->op_first)->op_first)
957 && op->op_type == OP_PADRANGE
958 && op->op_ppaddr != lt_pp_padrange
959 && op->op_private & OPpLVAL_INTRO
960 && op->op_flags & OPf_SPECIAL) {
961 const OP *start = cUNOPx(cBINOPo->op_last)->op_first;
962 if (start->op_type == OP_PUSHMARK)
963 start = OpSIBLING(start);
964 lt_maybe_padrange_setup(op, start);
978 # if LT_HAS_PERL(5, 10, 0)
983 lt_peep_rec(cLOGOPo->op_other);
987 lt_peep_rec(cLOOPo->op_redoop);
988 lt_peep_rec(cLOOPo->op_nextop);
989 lt_peep_rec(cLOOPo->op_lastop);
991 # if LT_HAS_PERL(5, 9, 5)
993 lt_peep_rec(cPMOPo->op_pmstashstartu.op_pmreplstart);
999 lt_peep_rec(cPMOPo->op_pmreplstart);
1002 #endif /* !LT_HAS_RPEEP */
1009 static void lt_peep(pTHX_ OP *o) {
1013 LT_ASSERT(lt_is_loaded(&MY_CXT));
1015 MY_CXT.old_peep(aTHX_ o);
1019 ptable_seen_clear(seen);
1021 ptable_seen_clear(seen);
1025 /* --- Module setup/teardown ----------------------------------------------- */
1027 static void lt_teardown(pTHX_ void *root) {
1032 if (lt_clear_loaded_locked(&MY_CXT)) {
1033 lt_ck_restore(OP_PADANY, <_old_ck_padany);
1034 lt_ck_restore(OP_PADSV, <_old_ck_padsv);
1036 ptable_map_free(lt_op_padxv_map);
1037 lt_op_padxv_map = NULL;
1039 #if LT_HAS_PERL(5, 17, 6)
1040 ptable_map_free(lt_op_padrange_map);
1041 lt_op_padrange_map = NULL;
1045 MUTEX_DESTROY(<_op_map_mutex);
1051 if (MY_CXT.old_peep) {
1053 PL_rpeepp = MY_CXT.old_peep;
1055 PL_peepp = MY_CXT.old_peep;
1057 MY_CXT.old_peep = 0;
1060 ptable_seen_free(MY_CXT.seen);
1064 ptable_hints_free(MY_CXT.tbl);
1068 SvREFCNT_dec(MY_CXT.default_meth);
1069 MY_CXT.default_meth = NULL;
1074 static void lt_setup(pTHX) {
1075 #define lt_setup() lt_setup(aTHX)
1076 MY_CXT_INIT; /* Takes/release PL_my_ctx_mutex */
1080 if (lt_set_loaded_locked(&MY_CXT)) {
1081 PERL_HASH(lt_hash, __PACKAGE__, __PACKAGE_LEN__);
1083 lt_op_padxv_map = ptable_new();
1084 #if LT_HAS_PERL(5, 17, 6)
1085 lt_op_padrange_map = ptable_new();
1089 MUTEX_INIT(<_op_map_mutex);
1092 lt_ck_replace(OP_PADANY, lt_ck_padany, <_old_ck_padany);
1093 lt_ck_replace(OP_PADSV, lt_ck_padsv, <_old_ck_padsv);
1101 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
1102 newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
1103 newCONSTSUB(stash, "LT_FORKSAFE", newSVuv(LT_FORKSAFE));
1107 if (PL_rpeepp != lt_peep) {
1108 MY_CXT.old_peep = PL_rpeepp;
1109 PL_rpeepp = lt_peep;
1112 if (PL_peepp != lt_peep) {
1113 MY_CXT.old_peep = PL_peepp;
1118 MY_CXT.old_peep = 0;
1121 MY_CXT.seen = ptable_new();
1124 MY_CXT.tbl = ptable_new();
1125 MY_CXT.owner = aTHX;
1128 MY_CXT.default_meth = newSVpvn("TYPEDSCALAR", 11);
1129 SvREADONLY_on(MY_CXT.default_meth);
1131 call_atexit(lt_teardown, NULL);
1136 /* --- XS ------------------------------------------------------------------ */
1138 MODULE = Lexical::Types PACKAGE = Lexical::Types
1155 SV *cloned_default_meth;
1159 lt_ptable_clone_ud ud;
1163 lt_ptable_clone_ud_init(ud, t, MY_CXT.owner);
1164 ptable_walk(MY_CXT.tbl, lt_ptable_clone, &ud);
1165 cloned_default_meth = lt_dup_inc(MY_CXT.default_meth, &ud);
1166 lt_ptable_clone_ud_deinit(ud);
1174 MY_CXT.owner = aTHX;
1175 MY_CXT.default_meth = cloned_default_meth;
1179 global_setup = lt_set_loaded_locked(&MY_CXT);
1180 LT_ASSERT(!global_setup);
1192 RETVAL = lt_tag(value);