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 */
128 OP * (*pp_padsv_saved)(pTHX);
133 /* ... Cloning global data ................................................. */
137 STATIC SV *lt_clone(pTHX_ SV *sv, tTHX owner) {
138 #define lt_clone(S, O) lt_clone(aTHX_ (S), (O))
143 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
146 param.stashes = stashes;
148 param.proto_perl = owner;
150 dupsv = sv_dup(sv, ¶m);
154 SvREFCNT_dec(stashes);
157 return SvREFCNT_inc(dupsv);
160 STATIC void lt_ptable_hints_clone(pTHX_ ptable_ent *ent, void *ud_) {
162 lt_hint_t *h1 = ent->val;
163 lt_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
167 if (ud->owner != aTHX)
168 h2->code = lt_clone(h1->code, ud->owner);
170 ptable_hints_store(ud->tbl, ent->key, h2);
171 SvREFCNT_inc(h2->code);
174 STATIC void lt_thread_cleanup(pTHX_ void *);
176 STATIC void lt_thread_cleanup(pTHX_ void *ud) {
182 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
186 PerlMemShared_free(level);
187 ptable_hints_free(MY_CXT.tbl);
191 #endif /* LT_THREADSAFE */
193 /* ... Hint tags ........................................................... */
195 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
197 STATIC SV *lt_tag(pTHX_ SV *value) {
198 #define lt_tag(V) lt_tag(aTHX_ (V))
202 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
204 h = PerlMemShared_malloc(sizeof *h);
205 h->code = SvREFCNT_inc(value);
207 #if LT_WORKAROUND_REQUIRE_PROPAGATION
212 for (si = PL_curstackinfo; si; si = si->si_prev) {
215 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
216 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
218 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
223 h->requires = requires;
227 /* We only need for the key to be an unique tag for looking up the value later.
228 * Allocated memory provides convenient unique identifiers, so that's why we
229 * use the value pointer as the key itself. */
230 ptable_hints_store(MY_CXT.tbl, value, h);
232 return newSVuv(PTR2UV(value));
235 STATIC SV *lt_detag(pTHX_ const SV *hint) {
236 #define lt_detag(H) lt_detag(aTHX_ (H))
240 if (!(hint && SvOK(hint) && SvIOK(hint)))
243 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
245 #if LT_WORKAROUND_REQUIRE_PROPAGATION
250 for (si = PL_curstackinfo; si; si = si->si_prev) {
253 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
254 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
256 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
257 && ++requires > h->requires)
269 STATIC SV *lt_tag(pTHX_ SV *value) {
270 #define lt_tag(V) lt_tag(aTHX_ (V))
273 if (SvOK(value) && SvROK(value)) {
282 #define lt_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
284 #endif /* LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION */
286 STATIC U32 lt_hash = 0;
288 STATIC SV *lt_hint(pTHX) {
289 #define lt_hint() lt_hint(aTHX)
291 #if LT_HAS_PERL(5, 9, 5)
292 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
294 __PACKAGE__, __PACKAGE_LEN__,
298 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, lt_hash);
303 return lt_detag(hint);
306 /* ... op => info map ...................................................... */
308 #define PTABLE_NAME ptable_map
309 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
313 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
314 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
316 STATIC ptable *lt_op_map = NULL;
319 STATIC perl_mutex lt_op_map_mutex;
324 STRLEN buf_size, orig_pkg_len, type_pkg_len, type_meth_len;
326 #else /* MULTIPLICITY */
330 #endif /* !MULTIPLICITY */
331 OP *(*pp_padsv)(pTHX);
334 STATIC void lt_map_store(pTHX_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*pp_padsv)(pTHX)) {
335 #define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aTHX_ (O), (OP), (TP), (TM), (PP))
339 MUTEX_LOCK(<_op_map_mutex);
342 if (!(oi = ptable_fetch(lt_op_map, o))) {
343 oi = PerlMemShared_malloc(sizeof *oi);
344 ptable_map_store(lt_op_map, o, oi);
348 #else /* MULTIPLICITY */
350 SvREFCNT_dec(oi->orig_pkg);
351 SvREFCNT_dec(oi->type_pkg);
352 SvREFCNT_dec(oi->type_meth);
353 #endif /* !MULTIPLICITY */
358 STRLEN op_len = SvCUR(orig_pkg);
359 STRLEN tp_len = SvCUR(type_pkg);
360 STRLEN tm_len = SvCUR(type_meth);
361 STRLEN new_buf_size = op_len + tp_len + tm_len;
363 if (new_buf_size > oi->buf_size) {
364 PerlMemShared_free(oi->buf);
365 oi->buf = PerlMemShared_malloc(new_buf_size);
366 oi->buf_size = new_buf_size;
369 Copy(SvPVX(orig_pkg), buf, op_len, char);
371 Copy(SvPVX(type_pkg), buf, tp_len, char);
373 Copy(SvPVX(type_meth), buf, tm_len, char);
374 oi->orig_pkg_len = op_len;
375 oi->type_pkg_len = tp_len;
376 oi->type_meth_len = tm_len;
377 SvREFCNT_dec(orig_pkg);
378 SvREFCNT_dec(type_pkg);
379 SvREFCNT_dec(type_meth);
381 #else /* MULTIPLICITY */
382 oi->orig_pkg = orig_pkg;
383 oi->type_pkg = type_pkg;
384 oi->type_meth = type_meth;
385 #endif /* !MULTIPLICITY */
387 oi->pp_padsv = pp_padsv;
390 MUTEX_UNLOCK(<_op_map_mutex);
394 STATIC const lt_op_info *lt_map_fetch(const OP *o, lt_op_info *oi) {
395 const lt_op_info *val;
398 MUTEX_LOCK(<_op_map_mutex);
401 val = ptable_fetch(lt_op_map, o);
408 MUTEX_UNLOCK(<_op_map_mutex);
414 STATIC void lt_map_delete(pTHX_ const OP *o) {
415 #define lt_map_delete(O) lt_map_delete(aTHX_ (O))
417 MUTEX_LOCK(<_op_map_mutex);
420 ptable_map_store(lt_op_map, o, NULL);
423 MUTEX_UNLOCK(<_op_map_mutex);
427 /* --- Hooks --------------------------------------------------------------- */
429 /* ... Our pp_padsv ........................................................ */
431 STATIC OP *lt_pp_padsv(pTHX) {
434 if ((PL_op->op_private & OPpLVAL_INTRO) && lt_map_fetch(PL_op, &oi)) {
435 PADOFFSET targ = PL_op->op_targ;
436 SV *sv = PAD_SVl(targ);
439 SV *orig_pkg, *type_pkg, *type_meth;
448 STRLEN op_len = oi.orig_pkg_len, tp_len = oi.type_pkg_len;
450 orig_pkg = sv_2mortal(newSVpvn(buf, op_len));
451 SvREADONLY_on(orig_pkg);
453 type_pkg = sv_2mortal(newSVpvn(buf, tp_len));
454 SvREADONLY_on(type_pkg);
456 type_meth = sv_2mortal(newSVpvn(buf, oi.type_meth_len));
457 SvREADONLY_on(type_meth);
459 #else /* MULTIPLICITY */
460 orig_pkg = oi.orig_pkg;
461 type_pkg = oi.type_pkg;
462 type_meth = oi.type_meth;
463 #endif /* !MULTIPLICITY */
472 items = call_sv(type_meth, G_ARRAY | G_METHOD);
482 croak("Typed scalar initializer method should return zero or one scalar, but got %d", items);
490 return CALL_FPTR(oi.pp_padsv)(aTHX);
493 return CALL_FPTR(PL_ppaddr[OP_PADSV])(aTHX);
496 STATIC void lt_pp_padsv_save(pMY_CXT) {
497 #define lt_pp_padsv_save() lt_pp_padsv_save(aMY_CXT)
498 if (MY_CXT.pp_padsv_saved)
501 MY_CXT.pp_padsv_saved = PL_ppaddr[OP_PADSV];
502 PL_ppaddr[OP_PADSV] = lt_pp_padsv;
505 STATIC void lt_pp_padsv_restore(pMY_CXT_ OP *o) {
506 #define lt_pp_padsv_restore(O) lt_pp_padsv_restore(aMY_CXT_ (O))
507 OP *(*saved)(pTHX) = MY_CXT.pp_padsv_saved;
512 if (o->op_ppaddr == lt_pp_padsv)
513 o->op_ppaddr = saved;
515 PL_ppaddr[OP_PADSV] = saved;
516 MY_CXT.pp_padsv_saved = 0;
519 /* ... Our ck_pad{any,sv} .................................................. */
521 /* Sadly, the PADSV OPs we are interested in don't trigger the padsv check
522 * function, but are instead manually mutated from a PADANY. This is why we set
523 * PL_ppaddr[OP_PADSV] in the padany check function so that PADSV OPs will have
524 * their pp_ppaddr set to our pp_padsv. PL_ppaddr[OP_PADSV] is then reset at the
525 * beginning of every ck_pad{any,sv}. Some unwanted OPs can still call our
526 * pp_padsv, but much less than if we would have set PL_ppaddr[OP_PADSV]
529 STATIC OP *(*lt_old_ck_padany)(pTHX_ OP *) = 0;
531 STATIC OP *lt_ck_padany(pTHX_ OP *o) {
536 lt_pp_padsv_restore(o);
538 o = CALL_FPTR(lt_old_ck_padany)(aTHX_ o);
540 stash = PL_in_my_stash;
541 if (stash && (code = lt_hint())) {
542 SV *orig_pkg = newSVpvn(HvNAME_get(stash), HvNAMELEN_get(stash));
543 SV *orig_meth = MY_CXT.default_meth;
545 SV *type_meth = NULL;
550 SvREADONLY_on(orig_pkg);
561 items = call_sv(code, G_ARRAY);
565 croak(__PACKAGE__ " mangler should return zero, one or two scalars, but got %d", items);
567 SvREFCNT_dec(orig_pkg);
574 type_meth = newSVsv(rsv);
575 SvREADONLY_on(type_meth);
580 type_pkg = newSVsv(rsv);
581 SvREADONLY_on(type_pkg);
591 SvREFCNT_inc(orig_pkg);
595 type_meth = orig_meth;
596 SvREFCNT_inc(orig_meth);
601 lt_map_store(o, orig_pkg, type_pkg, type_meth, MY_CXT.pp_padsv_saved);
610 STATIC OP *(*lt_old_ck_padsv)(pTHX_ OP *) = 0;
612 STATIC OP *lt_ck_padsv(pTHX_ OP *o) {
615 lt_pp_padsv_restore(o);
619 return CALL_FPTR(lt_old_ck_padsv)(aTHX_ o);
622 STATIC U32 lt_initialized = 0;
624 /* --- XS ------------------------------------------------------------------ */
626 MODULE = Lexical::Types PACKAGE = Lexical::Types
632 if (!lt_initialized++) {
636 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
637 MY_CXT.tbl = ptable_new();
642 MY_CXT.pp_padsv_saved = 0;
643 MY_CXT.default_meth = newSVpvn("TYPEDSCALAR", 11);
644 SvREADONLY_on(MY_CXT.default_meth);
646 lt_op_map = ptable_new();
648 MUTEX_INIT(<_op_map_mutex);
651 PERL_HASH(lt_hash, __PACKAGE__, __PACKAGE_LEN__);
653 lt_old_ck_padany = PL_check[OP_PADANY];
654 PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_ck_padany);
655 lt_old_ck_padsv = PL_check[OP_PADSV];
656 PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_ck_padsv);
658 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
659 newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
671 SV *cloned_default_meth;
676 ud.tbl = t = ptable_new();
677 ud.owner = MY_CXT.owner;
678 ptable_walk(MY_CXT.tbl, lt_ptable_hints_clone, &ud);
679 cloned_default_meth = lt_clone(MY_CXT.default_meth, MY_CXT.owner);
685 MY_CXT.pp_padsv_saved = 0;
686 MY_CXT.default_meth = cloned_default_meth;
689 level = PerlMemShared_malloc(sizeof *level);
692 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
702 RETVAL = lt_tag(value);