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 HvNAME_get(H) HvNAME(H)
35 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
39 # define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
42 /* ... Thread safety and multiplicity ...................................... */
44 #ifndef LT_MULTIPLICITY
45 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
46 # define LT_MULTIPLICITY 1
48 # define LT_MULTIPLICITY 0
51 #if LT_MULTIPLICITY && !defined(tTHX)
52 # define tTHX PerlInterpreter*
55 #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))
56 # define LT_THREADSAFE 1
58 # define MY_CXT_CLONE \
60 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
61 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
62 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
65 # define LT_THREADSAFE 0
67 # define dMY_CXT dNOOP
69 # define MY_CXT lt_globaldata
71 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
73 # define MY_CXT_INIT NOOP
75 # define MY_CXT_CLONE NOOP
86 /* --- Helpers ------------------------------------------------------------- */
88 /* ... Thread-safe hints ................................................... */
90 /* If any of those is true, we need to store the hint in a global table. */
92 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
96 #if LT_WORKAROUND_REQUIRE_PROPAGATION
101 #define PTABLE_NAME ptable_hints
102 #define PTABLE_VAL_FREE(V) { lt_hint_t *h = (V); SvREFCNT_dec(h->code); PerlMemShared_free(h); }
111 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
112 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
114 #endif /* LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION */
116 /* ... Global data ......................................................... */
118 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
121 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
122 ptable *tbl; /* It really is a ptable_hints */
127 OP * (*pp_padsv_saved)(pTHX);
132 /* ... Cloning global data ................................................. */
136 STATIC void lt_ptable_hints_clone(pTHX_ ptable_ent *ent, void *ud_) {
138 lt_hint_t *h1 = ent->val;
139 lt_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
143 if (ud->owner != aTHX) {
146 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
147 param.stashes = stashes;
149 param.proto_perl = ud->owner;
150 h2->code = sv_dup(val, ¶m);
153 SvREFCNT_dec(stashes);
157 ptable_hints_store(ud->tbl, ent->key, h2);
158 SvREFCNT_inc(h2->code);
161 STATIC void lt_thread_cleanup(pTHX_ void *);
163 STATIC void lt_thread_cleanup(pTHX_ void *ud) {
169 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
173 PerlMemShared_free(level);
174 ptable_hints_free(MY_CXT.tbl);
178 #endif /* LT_THREADSAFE */
180 /* ... Hint tags ........................................................... */
182 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
184 STATIC SV *lt_tag(pTHX_ SV *value) {
185 #define lt_tag(V) lt_tag(aTHX_ (V))
189 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
191 h = PerlMemShared_malloc(sizeof *h);
192 h->code = SvREFCNT_inc(value);
194 #if LT_WORKAROUND_REQUIRE_PROPAGATION
199 for (si = PL_curstackinfo; si; si = si->si_prev) {
202 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
203 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
205 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
210 h->requires = requires;
214 /* We only need for the key to be an unique tag for looking up the value later.
215 * Allocated memory provides convenient unique identifiers, so that's why we
216 * use the value pointer as the key itself. */
217 ptable_hints_store(MY_CXT.tbl, value, h);
219 return newSVuv(PTR2UV(value));
222 STATIC SV *lt_detag(pTHX_ const SV *hint) {
223 #define lt_detag(H) lt_detag(aTHX_ (H))
227 if (!(hint && SvOK(hint) && SvIOK(hint)))
230 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
232 #if LT_WORKAROUND_REQUIRE_PROPAGATION
237 for (si = PL_curstackinfo; si; si = si->si_prev) {
240 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
241 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
243 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
244 && ++requires > h->requires)
256 STATIC SV *lt_tag(pTHX_ SV *value) {
257 #define lt_tag(V) lt_tag(aTHX_ (V))
260 if (SvOK(value) && SvROK(value)) {
269 #define lt_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
271 #endif /* LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION */
273 STATIC U32 lt_hash = 0;
275 STATIC SV *lt_hint(pTHX) {
276 #define lt_hint() lt_hint(aTHX)
278 #if LT_HAS_PERL(5, 9, 5)
279 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
281 __PACKAGE__, __PACKAGE_LEN__,
285 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, lt_hash);
290 return lt_detag(hint);
293 /* ... op => info map ...................................................... */
295 #define PTABLE_NAME ptable_map
296 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
300 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
301 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
303 STATIC ptable *lt_op_map = NULL;
306 STATIC perl_mutex lt_op_map_mutex;
313 OP *(*pp_padsv)(pTHX);
316 STATIC void lt_map_store(pPTBLMS_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*pp_padsv)(pTHX)) {
317 #define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aPTBLMS_ (O), (OP), (TP), (TM), (PP))
321 MUTEX_LOCK(<_op_map_mutex);
324 if (!(oi = ptable_fetch(lt_op_map, o))) {
325 oi = PerlMemShared_malloc(sizeof *oi);
326 ptable_map_store(lt_op_map, o, oi);
329 oi->orig_pkg = orig_pkg;
330 oi->type_pkg = type_pkg;
331 oi->type_meth = type_meth;
332 oi->pp_padsv = pp_padsv;
335 MUTEX_UNLOCK(<_op_map_mutex);
339 STATIC const lt_op_info *lt_map_fetch(const OP *o, lt_op_info *oi) {
340 const lt_op_info *val;
343 MUTEX_LOCK(<_op_map_mutex);
346 val = ptable_fetch(lt_op_map, o);
353 MUTEX_UNLOCK(<_op_map_mutex);
359 STATIC void lt_map_delete(pTHX_ const OP *o) {
360 #define lt_map_delete(O) lt_map_delete(aTHX_ (O))
362 MUTEX_LOCK(<_op_map_mutex);
365 ptable_map_store(lt_op_map, o, NULL);
368 MUTEX_UNLOCK(<_op_map_mutex);
372 /* --- Hooks --------------------------------------------------------------- */
374 /* ... Our pp_padsv ........................................................ */
376 STATIC OP *lt_pp_padsv(pTHX) {
379 if ((PL_op->op_private & OPpLVAL_INTRO) && lt_map_fetch(PL_op, &oi)) {
380 PADOFFSET targ = PL_op->op_targ;
381 SV *sv = PAD_SVl(targ);
397 items = call_sv(oi.type_meth, G_ARRAY | G_METHOD);
407 croak("Typed scalar initializer method should return zero or one scalar, but got %d", items);
415 return CALL_FPTR(oi.pp_padsv)(aTHX);
418 return CALL_FPTR(PL_ppaddr[OP_PADSV])(aTHX);
421 STATIC void lt_pp_padsv_save(pMY_CXT) {
422 #define lt_pp_padsv_save() lt_pp_padsv_save(aMY_CXT)
423 if (MY_CXT.pp_padsv_saved)
426 MY_CXT.pp_padsv_saved = PL_ppaddr[OP_PADSV];
427 PL_ppaddr[OP_PADSV] = lt_pp_padsv;
430 STATIC void lt_pp_padsv_restore(pMY_CXT_ OP *o) {
431 #define lt_pp_padsv_restore(O) lt_pp_padsv_restore(aMY_CXT_ (O))
432 OP *(*saved)(pTHX) = MY_CXT.pp_padsv_saved;
437 if (o->op_ppaddr == lt_pp_padsv)
438 o->op_ppaddr = saved;
440 PL_ppaddr[OP_PADSV] = saved;
441 MY_CXT.pp_padsv_saved = 0;
444 /* ... Our ck_pad{any,sv} .................................................. */
446 /* Sadly, the PADSV OPs we are interested in don't trigger the padsv check
447 * function, but are instead manually mutated from a PADANY. This is why we set
448 * PL_ppaddr[OP_PADSV] in the padany check function so that PADSV OPs will have
449 * their pp_ppaddr set to our pp_padsv. PL_ppaddr[OP_PADSV] is then reset at the
450 * beginning of every ck_pad{any,sv}. Some unwanted OPs can still call our
451 * pp_padsv, but much less than if we would have set PL_ppaddr[OP_PADSV]
454 STATIC SV *lt_default_meth = NULL;
456 STATIC OP *(*lt_old_ck_padany)(pTHX_ OP *) = 0;
458 STATIC OP *lt_ck_padany(pTHX_ OP *o) {
463 lt_pp_padsv_restore(o);
465 o = CALL_FPTR(lt_old_ck_padany)(aTHX_ o);
467 stash = PL_in_my_stash;
468 if (stash && (code = lt_hint())) {
469 SV *orig_pkg = newSVpvn(HvNAME_get(stash), HvNAMELEN_get(stash));
470 SV *orig_meth = lt_default_meth;
472 SV *type_meth = NULL;
477 SvREADONLY_on(orig_pkg);
488 items = call_sv(code, G_ARRAY);
492 croak(__PACKAGE__ " mangler should return zero, one or two scalars, but got %d", items);
494 SvREFCNT_dec(orig_pkg);
501 type_meth = newSVsv(rsv);
502 SvREADONLY_on(type_meth);
507 type_pkg = newSVsv(rsv);
508 SvREADONLY_on(type_pkg);
518 SvREFCNT_inc(orig_pkg);
522 type_meth = orig_meth;
523 SvREFCNT_inc(orig_meth);
528 lt_map_store(o, orig_pkg, type_pkg, type_meth, MY_CXT.pp_padsv_saved);
537 STATIC OP *(*lt_old_ck_padsv)(pTHX_ OP *) = 0;
539 STATIC OP *lt_ck_padsv(pTHX_ OP *o) {
542 lt_pp_padsv_restore(o);
546 return CALL_FPTR(lt_old_ck_padsv)(aTHX_ o);
549 STATIC U32 lt_initialized = 0;
551 /* --- XS ------------------------------------------------------------------ */
553 MODULE = Lexical::Types PACKAGE = Lexical::Types
559 if (!lt_initialized++) {
563 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
564 MY_CXT.tbl = ptable_new();
569 MY_CXT.pp_padsv_saved = 0;
571 lt_op_map = ptable_new();
573 MUTEX_INIT(<_op_map_mutex);
576 lt_default_meth = newSVpvn("TYPEDSCALAR", 11);
577 SvREADONLY_on(lt_default_meth);
579 PERL_HASH(lt_hash, __PACKAGE__, __PACKAGE_LEN__);
581 lt_old_ck_padany = PL_check[OP_PADANY];
582 PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_ck_padany);
583 lt_old_ck_padsv = PL_check[OP_PADSV];
584 PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_ck_padsv);
586 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
587 newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
603 ud.tbl = t = ptable_new();
604 ud.owner = MY_CXT.owner;
605 ptable_walk(MY_CXT.tbl, lt_ptable_hints_clone, &ud);
611 MY_CXT.pp_padsv_saved = 0;
614 level = PerlMemShared_malloc(sizeof *level);
617 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
627 RETVAL = lt_tag(value);