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))
38 #ifndef SvREFCNT_inc_simple_NN
39 # define SvREFCNT_inc_simple_NN SvREFCNT_inc
43 #if defined(ENTER_with_name) && !LT_HAS_PERL(5, 11, 4)
44 # define ENTERn(N) ENTER_with_name(N)
46 # define ENTERn(N) ENTER
50 #if defined(LEAVE_with_name) && !LT_HAS_PERL(5, 11, 4)
51 # define LEAVEn(N) LEAVE_with_name(N)
53 # define LEAVEn(N) LEAVE
56 /* ... Thread safety and multiplicity ...................................... */
58 #ifndef LT_MULTIPLICITY
59 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
60 # define LT_MULTIPLICITY 1
62 # define LT_MULTIPLICITY 0
65 #if LT_MULTIPLICITY && !defined(tTHX)
66 # define tTHX PerlInterpreter*
69 #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))
70 # define LT_THREADSAFE 1
72 # define MY_CXT_CLONE \
74 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
75 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
76 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
79 # define LT_THREADSAFE 0
81 # define dMY_CXT dNOOP
83 # define MY_CXT lt_globaldata
85 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
87 # define MY_CXT_INIT NOOP
89 # define MY_CXT_CLONE NOOP
100 /* --- Helpers ------------------------------------------------------------- */
102 /* ... Thread-safe hints ................................................... */
104 #if LT_WORKAROUND_REQUIRE_PROPAGATION
111 #define LT_HINT_STRUCT 1
113 #define LT_HINT_CODE(H) ((H)->code)
115 #define LT_HINT_FREE(H) { \
116 lt_hint_t *h = (H); \
117 SvREFCNT_dec(h->code); \
118 PerlMemShared_free(h); \
121 #else /* LT_WORKAROUND_REQUIRE_PROPAGATION */
123 typedef SV lt_hint_t;
125 #define LT_HINT_STRUCT 0
127 #define LT_HINT_CODE(H) (H)
129 #define LT_HINT_FREE(H) SvREFCNT_dec(H);
131 #endif /* !LT_WORKAROUND_REQUIRE_PROPAGATION */
135 #define PTABLE_NAME ptable_hints
136 #define PTABLE_VAL_FREE(V) LT_HINT_FREE(V)
145 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
146 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
148 #endif /* LT_THREADSAFE */
150 /* ... Global data ......................................................... */
152 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
156 ptable *tbl; /* It really is a ptable_hints */
160 OP * (*pp_padsv_saved)(pTHX);
165 /* ... Cloning global data ................................................. */
169 STATIC SV *lt_clone(pTHX_ SV *sv, tTHX owner) {
170 #define lt_clone(S, O) lt_clone(aTHX_ (S), (O))
175 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
178 param.stashes = stashes;
180 param.proto_perl = owner;
182 dupsv = sv_dup(sv, ¶m);
186 SvREFCNT_dec(stashes);
189 return SvREFCNT_inc(dupsv);
192 STATIC void lt_ptable_hints_clone(pTHX_ ptable_ent *ent, void *ud_) {
194 lt_hint_t *h1 = ent->val;
197 if (ud->owner == aTHX)
202 h2 = PerlMemShared_malloc(sizeof *h2);
203 h2->code = lt_clone(h1->code, ud->owner);
204 SvREFCNT_inc(h2->code);
205 #if LT_WORKAROUND_REQUIRE_PROPAGATION
206 h2->cxreq = h1->cxreq;
209 #else /* LT_HINT_STRUCT */
211 h2 = lt_clone(h1, ud->owner);
214 #endif /* !LT_HINT_STRUCT */
216 ptable_hints_store(ud->tbl, ent->key, h2);
219 STATIC void lt_thread_cleanup(pTHX_ void *);
221 STATIC void lt_thread_cleanup(pTHX_ void *ud) {
227 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
231 PerlMemShared_free(level);
232 ptable_hints_free(MY_CXT.tbl);
236 #endif /* LT_THREADSAFE */
238 /* ... Hint tags ........................................................... */
240 #if LT_WORKAROUND_REQUIRE_PROPAGATION
241 STATIC IV lt_require_tag(pTHX) {
242 #define lt_require_tag() lt_require_tag(aTHX)
245 for (si = PL_curstackinfo; si; si = si->si_prev) {
248 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
249 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
251 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
258 #endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
260 STATIC SV *lt_tag(pTHX_ SV *value) {
261 #define lt_tag(V) lt_tag(aTHX_ (V))
268 if (SvTYPE(value) >= SVt_PVCV) {
270 SvREFCNT_inc_simple_NN(code);
275 h = PerlMemShared_malloc(sizeof *h);
277 # if LT_WORKAROUND_REQUIRE_PROPAGATION
278 h->cxreq = lt_require_tag();
279 # endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
280 #else /* LT_HINT_STRUCT */
282 #endif /* !LT_HINT_STRUCT */
285 /* We only need for the key to be an unique tag for looking up the value later.
286 * Allocated memory provides convenient unique identifiers, so that's why we
287 * use the hint as the key itself. */
288 ptable_hints_store(MY_CXT.tbl, h, h);
289 #endif /* LT_THREADSAFE */
291 return newSViv(PTR2IV(h));
294 STATIC SV *lt_detag(pTHX_ const SV *hint) {
295 #define lt_detag(H) lt_detag(aTHX_ (H))
299 if (!(hint && SvIOK(hint)))
302 h = INT2PTR(lt_hint_t *, SvIVX(hint));
304 h = ptable_fetch(MY_CXT.tbl, h);
305 #endif /* LT_THREADSAFE */
306 #if LT_WORKAROUND_REQUIRE_PROPAGATION
307 if (lt_require_tag() != h->cxreq)
309 #endif /* LT_WORKAROUND_REQUIRE_PROPAGATION */
311 return LT_HINT_CODE(h);
314 STATIC U32 lt_hash = 0;
316 STATIC SV *lt_hint(pTHX) {
317 #define lt_hint() lt_hint(aTHX)
319 #if LT_HAS_PERL(5, 9, 5)
320 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
322 __PACKAGE__, __PACKAGE_LEN__,
326 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, lt_hash);
331 return lt_detag(hint);
334 /* ... op => info map ...................................................... */
336 #define PTABLE_NAME ptable_map
337 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
341 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
342 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
344 STATIC ptable *lt_op_map = NULL;
347 STATIC perl_mutex lt_op_map_mutex;
352 STRLEN buf_size, orig_pkg_len, type_pkg_len, type_meth_len;
354 #else /* MULTIPLICITY */
358 #endif /* !MULTIPLICITY */
359 OP *(*old_pp_padsv)(pTHX);
362 STATIC void lt_map_store(pTHX_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*old_pp_padsv)(pTHX)) {
363 #define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aTHX_ (O), (OP), (TP), (TM), (PP))
367 MUTEX_LOCK(<_op_map_mutex);
370 if (!(oi = ptable_fetch(lt_op_map, o))) {
371 oi = PerlMemShared_malloc(sizeof *oi);
372 ptable_map_store(lt_op_map, o, oi);
376 #else /* MULTIPLICITY */
378 SvREFCNT_dec(oi->orig_pkg);
379 SvREFCNT_dec(oi->type_pkg);
380 SvREFCNT_dec(oi->type_meth);
381 #endif /* !MULTIPLICITY */
386 STRLEN op_len = SvCUR(orig_pkg);
387 STRLEN tp_len = SvCUR(type_pkg);
388 STRLEN tm_len = SvCUR(type_meth);
389 STRLEN new_buf_size = op_len + tp_len + tm_len;
391 if (new_buf_size > oi->buf_size) {
392 PerlMemShared_free(oi->buf);
393 oi->buf = PerlMemShared_malloc(new_buf_size);
394 oi->buf_size = new_buf_size;
397 Copy(SvPVX(orig_pkg), buf, op_len, char);
399 Copy(SvPVX(type_pkg), buf, tp_len, char);
401 Copy(SvPVX(type_meth), buf, tm_len, char);
402 oi->orig_pkg_len = op_len;
403 oi->type_pkg_len = tp_len;
404 oi->type_meth_len = tm_len;
405 SvREFCNT_dec(orig_pkg);
406 SvREFCNT_dec(type_pkg);
407 SvREFCNT_dec(type_meth);
409 #else /* MULTIPLICITY */
410 oi->orig_pkg = orig_pkg;
411 oi->type_pkg = type_pkg;
412 oi->type_meth = type_meth;
413 #endif /* !MULTIPLICITY */
415 oi->old_pp_padsv = old_pp_padsv;
418 MUTEX_UNLOCK(<_op_map_mutex);
422 STATIC const lt_op_info *lt_map_fetch(const OP *o, lt_op_info *oi) {
423 const lt_op_info *val;
426 MUTEX_LOCK(<_op_map_mutex);
429 val = ptable_fetch(lt_op_map, o);
436 MUTEX_UNLOCK(<_op_map_mutex);
442 STATIC void lt_map_delete(pTHX_ const OP *o) {
443 #define lt_map_delete(O) lt_map_delete(aTHX_ (O))
445 MUTEX_LOCK(<_op_map_mutex);
448 ptable_map_store(lt_op_map, o, NULL);
451 MUTEX_UNLOCK(<_op_map_mutex);
455 /* --- Hooks --------------------------------------------------------------- */
457 /* ... Our pp_padsv ........................................................ */
459 STATIC OP *lt_pp_padsv(pTHX) {
462 if ((PL_op->op_private & OPpLVAL_INTRO) && lt_map_fetch(PL_op, &oi)) {
463 PADOFFSET targ = PL_op->op_targ;
464 SV *sv = PAD_SVl(targ);
467 SV *orig_pkg, *type_pkg, *type_meth;
476 STRLEN op_len = oi.orig_pkg_len, tp_len = oi.type_pkg_len;
478 orig_pkg = sv_2mortal(newSVpvn(buf, op_len));
479 SvREADONLY_on(orig_pkg);
481 type_pkg = sv_2mortal(newSVpvn(buf, tp_len));
482 SvREADONLY_on(type_pkg);
484 type_meth = sv_2mortal(newSVpvn(buf, oi.type_meth_len));
485 SvREADONLY_on(type_meth);
487 #else /* MULTIPLICITY */
488 orig_pkg = oi.orig_pkg;
489 type_pkg = oi.type_pkg;
490 type_meth = oi.type_meth;
491 #endif /* !MULTIPLICITY */
500 items = call_sv(type_meth, G_ARRAY | G_METHOD);
510 croak("Typed scalar initializer method should return zero or one scalar, but got %d", items);
518 return CALL_FPTR(oi.old_pp_padsv)(aTHX);
521 return CALL_FPTR(PL_ppaddr[OP_PADSV])(aTHX);
524 STATIC void lt_pp_padsv_save(pMY_CXT) {
525 #define lt_pp_padsv_save() lt_pp_padsv_save(aMY_CXT)
526 if (MY_CXT.pp_padsv_saved)
529 MY_CXT.pp_padsv_saved = PL_ppaddr[OP_PADSV];
530 PL_ppaddr[OP_PADSV] = lt_pp_padsv;
533 STATIC void lt_pp_padsv_restore(pMY_CXT_ OP *o) {
534 #define lt_pp_padsv_restore(O) lt_pp_padsv_restore(aMY_CXT_ (O))
535 OP *(*saved)(pTHX) = MY_CXT.pp_padsv_saved;
540 if (o->op_ppaddr == lt_pp_padsv)
541 o->op_ppaddr = saved;
543 PL_ppaddr[OP_PADSV] = saved;
544 MY_CXT.pp_padsv_saved = 0;
547 /* ... Our ck_pad{any,sv} .................................................. */
549 /* Sadly, the PADSV OPs we are interested in don't trigger the padsv check
550 * function, but are instead manually mutated from a PADANY. This is why we set
551 * PL_ppaddr[OP_PADSV] in the padany check function so that PADSV OPs will have
552 * their pp_ppaddr set to our pp_padsv. PL_ppaddr[OP_PADSV] is then reset at the
553 * beginning of every ck_pad{any,sv}. Some unwanted OPs can still call our
554 * pp_padsv, but much less than if we would have set PL_ppaddr[OP_PADSV]
557 STATIC OP *(*lt_old_ck_padany)(pTHX_ OP *) = 0;
559 STATIC OP *lt_ck_padany(pTHX_ OP *o) {
564 lt_pp_padsv_restore(o);
566 o = CALL_FPTR(lt_old_ck_padany)(aTHX_ o);
568 stash = PL_in_my_stash;
569 if (stash && (code = lt_hint())) {
570 SV *orig_pkg = newSVpvn(HvNAME_get(stash), HvNAMELEN_get(stash));
571 SV *orig_meth = MY_CXT.default_meth;
573 SV *type_meth = NULL;
578 SvREADONLY_on(orig_pkg);
589 items = call_sv(code, G_ARRAY);
593 croak(__PACKAGE__ " mangler should return zero, one or two scalars, but got %d", items);
595 SvREFCNT_dec(orig_pkg);
604 type_meth = newSVsv(rsv);
605 SvREADONLY_on(type_meth);
610 type_pkg = newSVsv(rsv);
611 SvREADONLY_on(type_pkg);
621 SvREFCNT_inc(orig_pkg);
625 type_meth = orig_meth;
626 SvREFCNT_inc(orig_meth);
631 lt_map_store(o, orig_pkg, type_pkg, type_meth, MY_CXT.pp_padsv_saved);
640 STATIC OP *(*lt_old_ck_padsv)(pTHX_ OP *) = 0;
642 STATIC OP *lt_ck_padsv(pTHX_ OP *o) {
645 lt_pp_padsv_restore(o);
649 return CALL_FPTR(lt_old_ck_padsv)(aTHX_ o);
652 STATIC U32 lt_initialized = 0;
654 STATIC void lt_teardown(pTHX_ void *root) {
666 ptable_hints_free(MY_CXT.tbl);
668 SvREFCNT_dec(MY_CXT.default_meth);
670 PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_old_ck_padany);
671 lt_old_ck_padany = 0;
672 PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_old_ck_padsv);
678 STATIC void lt_setup(pTHX) {
679 #define lt_setup() lt_setup(aTHX)
686 MY_CXT.tbl = ptable_new();
689 MY_CXT.pp_padsv_saved = 0;
690 MY_CXT.default_meth = newSVpvn("TYPEDSCALAR", 11);
691 SvREADONLY_on(MY_CXT.default_meth);
694 lt_old_ck_padany = PL_check[OP_PADANY];
695 PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_ck_padany);
696 lt_old_ck_padsv = PL_check[OP_PADSV];
697 PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_ck_padsv);
700 call_atexit(lt_teardown, aTHX);
702 call_atexit(lt_teardown, NULL);
708 STATIC U32 lt_booted = 0;
710 /* --- XS ------------------------------------------------------------------ */
712 MODULE = Lexical::Types PACKAGE = Lexical::Types
721 lt_op_map = ptable_new();
723 MUTEX_INIT(<_op_map_mutex);
726 PERL_HASH(lt_hash, __PACKAGE__, __PACKAGE_LEN__);
728 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
729 newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
743 SV *cloned_default_meth;
748 ud.tbl = t = ptable_new();
749 ud.owner = MY_CXT.owner;
750 ptable_walk(MY_CXT.tbl, lt_ptable_hints_clone, &ud);
751 cloned_default_meth = lt_clone(MY_CXT.default_meth, MY_CXT.owner);
757 MY_CXT.pp_padsv_saved = 0;
758 MY_CXT.default_meth = cloned_default_meth;
761 level = PerlMemShared_malloc(sizeof *level);
764 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
775 RETVAL = lt_tag(value);