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
78 /* --- Helpers ------------------------------------------------------------- */
80 /* ... Thread-safe hints ................................................... */
82 /* If any of those is true, we need to store the hint in a global table. */
84 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
88 #if LT_WORKAROUND_REQUIRE_PROPAGATION
93 #define PTABLE_NAME ptable_hints
94 #define PTABLE_VAL_FREE(V) { lt_hint_t *h = (V); SvREFCNT_dec(h->code); PerlMemShared_free(h); }
103 #define ptable_hints_store(T, K, V) ptable_hints_store(aTHX_ (T), (K), (V))
104 #define ptable_hints_free(T) ptable_hints_free(aTHX_ (T))
106 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
109 ptable *tbl; /* It really is a ptable_hints */
119 STATIC void lt_ptable_hints_clone(pTHX_ ptable_ent *ent, void *ud_) {
121 lt_hint_t *h1 = ent->val;
122 lt_hint_t *h2 = PerlMemShared_malloc(sizeof *h2);
126 if (ud->owner != aTHX) {
129 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
130 param.stashes = stashes;
132 param.proto_perl = ud->owner;
133 h2->code = sv_dup(val, ¶m);
136 SvREFCNT_dec(stashes);
140 ptable_hints_store(ud->tbl, ent->key, h2);
141 SvREFCNT_inc(h2->code);
144 STATIC void lt_thread_cleanup(pTHX_ void *);
146 STATIC void lt_thread_cleanup(pTHX_ void *ud) {
152 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
156 PerlMemShared_free(level);
157 ptable_hints_free(MY_CXT.tbl);
161 #endif /* LT_THREADSAFE */
163 STATIC SV *lt_tag(pTHX_ SV *value) {
164 #define lt_tag(V) lt_tag(aTHX_ (V))
168 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
170 h = PerlMemShared_malloc(sizeof *h);
171 h->code = SvREFCNT_inc(value);
173 #if LT_WORKAROUND_REQUIRE_PROPAGATION
178 for (si = PL_curstackinfo; si; si = si->si_prev) {
181 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
182 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
184 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE)
189 h->requires = requires;
193 /* We only need for the key to be an unique tag for looking up the value later.
194 * Allocated memory provides convenient unique identifiers, so that's why we
195 * use the value pointer as the key itself. */
196 ptable_hints_store(MY_CXT.tbl, value, h);
198 return newSVuv(PTR2UV(value));
201 STATIC SV *lt_detag(pTHX_ const SV *hint) {
202 #define lt_detag(H) lt_detag(aTHX_ (H))
206 if (!(hint && SvOK(hint) && SvIOK(hint)))
209 h = ptable_fetch(MY_CXT.tbl, INT2PTR(void *, SvUVX(hint)));
211 #if LT_WORKAROUND_REQUIRE_PROPAGATION
216 for (si = PL_curstackinfo; si; si = si->si_prev) {
219 for (cxix = si->si_cxix; cxix >= 0; --cxix) {
220 const PERL_CONTEXT *cx = si->si_cxstack + cxix;
222 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_REQUIRE
223 && ++requires > h->requires)
235 STATIC SV *lt_tag(pTHX_ SV *value) {
236 #define lt_tag(V) lt_tag(aTHX_ (V))
239 if (SvOK(value) && SvROK(value)) {
248 #define lt_detag(H) (((H) && SvOK(H)) ? INT2PTR(SV *, SvUVX(H)) : NULL)
250 #endif /* LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION */
252 STATIC U32 lt_hash = 0;
254 STATIC SV *lt_hint(pTHX) {
255 #define lt_hint() lt_hint(aTHX)
257 #if LT_HAS_PERL(5, 9, 5)
258 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
260 __PACKAGE__, __PACKAGE_LEN__,
264 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, lt_hash);
269 return lt_detag(hint);
272 /* ... op => info map ...................................................... */
274 #define PTABLE_NAME ptable_map
275 #define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
279 /* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
280 #define ptable_map_store(T, K, V) ptable_map_store(aPTBLMS_ (T), (K), (V))
282 STATIC ptable *lt_op_map = NULL;
285 STATIC perl_mutex lt_op_map_mutex;
292 OP *(*pp_padsv)(pTHX);
295 STATIC void lt_map_store(pPTBLMS_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*pp_padsv)(pTHX)) {
296 #define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aPTBLMS_ (O), (OP), (TP), (TM), (PP))
300 MUTEX_LOCK(<_op_map_mutex);
303 if (!(oi = ptable_fetch(lt_op_map, o))) {
304 oi = PerlMemShared_malloc(sizeof *oi);
305 ptable_map_store(lt_op_map, o, oi);
308 oi->orig_pkg = orig_pkg;
309 oi->type_pkg = type_pkg;
310 oi->type_meth = type_meth;
311 oi->pp_padsv = pp_padsv;
314 MUTEX_UNLOCK(<_op_map_mutex);
318 STATIC const lt_op_info *lt_map_fetch(const OP *o, lt_op_info *oi) {
319 const lt_op_info *val;
322 MUTEX_LOCK(<_op_map_mutex);
325 val = ptable_fetch(lt_op_map, o);
332 MUTEX_UNLOCK(<_op_map_mutex);
338 STATIC void lt_map_delete(pTHX_ const OP *o) {
339 #define lt_map_delete(O) lt_map_delete(aTHX_ (O))
341 MUTEX_LOCK(<_op_map_mutex);
344 ptable_map_store(lt_op_map, o, NULL);
347 MUTEX_UNLOCK(<_op_map_mutex);
351 /* --- Hooks --------------------------------------------------------------- */
353 /* ... Our pp_padsv ........................................................ */
355 STATIC OP *lt_pp_padsv(pTHX) {
358 if ((PL_op->op_private & OPpLVAL_INTRO) && lt_map_fetch(PL_op, &oi)) {
359 PADOFFSET targ = PL_op->op_targ;
360 SV *sv = PAD_SVl(targ);
376 items = call_sv(oi.type_meth, G_ARRAY | G_METHOD);
386 croak("Typed scalar initializer method should return zero or one scalar, but got %d", items);
394 return CALL_FPTR(oi.pp_padsv)(aTHX);
397 return CALL_FPTR(PL_ppaddr[OP_PADSV])(aTHX);
400 STATIC OP *(*lt_pp_padsv_saved)(pTHX) = 0;
402 STATIC void lt_pp_padsv_save(void) {
403 if (lt_pp_padsv_saved)
406 lt_pp_padsv_saved = PL_ppaddr[OP_PADSV];
407 PL_ppaddr[OP_PADSV] = lt_pp_padsv;
410 STATIC void lt_pp_padsv_restore(OP *o) {
411 if (!lt_pp_padsv_saved)
414 if (o->op_ppaddr == lt_pp_padsv)
415 o->op_ppaddr = lt_pp_padsv_saved;
417 PL_ppaddr[OP_PADSV] = lt_pp_padsv_saved;
418 lt_pp_padsv_saved = 0;
421 /* ... Our ck_pad{any,sv} .................................................. */
423 /* Sadly, the PADSV OPs we are interested in don't trigger the padsv check
424 * function, but are instead manually mutated from a PADANY. This is why we set
425 * PL_ppaddr[OP_PADSV] in the padany check function so that PADSV OPs will have
426 * their pp_ppaddr set to our pp_padsv. PL_ppaddr[OP_PADSV] is then reset at the
427 * beginning of every ck_pad{any,sv}. Some unwanted OPs can still call our
428 * pp_padsv, but much less than if we would have set PL_ppaddr[OP_PADSV]
431 STATIC SV *lt_default_meth = NULL;
433 STATIC OP *(*lt_old_ck_padany)(pTHX_ OP *) = 0;
435 STATIC OP *lt_ck_padany(pTHX_ OP *o) {
439 lt_pp_padsv_restore(o);
441 o = CALL_FPTR(lt_old_ck_padany)(aTHX_ o);
443 stash = PL_in_my_stash;
444 if (stash && (code = lt_hint())) {
445 SV *orig_pkg = newSVpvn(HvNAME_get(stash), HvNAMELEN_get(stash));
446 SV *orig_meth = lt_default_meth;
448 SV *type_meth = NULL;
453 SvREADONLY_on(orig_pkg);
464 items = call_sv(code, G_ARRAY);
468 croak(__PACKAGE__ " mangler should return zero, one or two scalars, but got %d", items);
470 SvREFCNT_dec(orig_pkg);
477 type_meth = newSVsv(rsv);
478 SvREADONLY_on(type_meth);
483 type_pkg = newSVsv(rsv);
484 SvREADONLY_on(type_pkg);
494 SvREFCNT_inc(orig_pkg);
498 type_meth = orig_meth;
499 SvREFCNT_inc(orig_meth);
504 lt_map_store(o, orig_pkg, type_pkg, type_meth, lt_pp_padsv_saved);
513 STATIC OP *(*lt_old_ck_padsv)(pTHX_ OP *) = 0;
515 STATIC OP *lt_ck_padsv(pTHX_ OP *o) {
516 lt_pp_padsv_restore(o);
520 return CALL_FPTR(lt_old_ck_padsv)(aTHX_ o);
523 STATIC U32 lt_initialized = 0;
525 /* --- XS ------------------------------------------------------------------ */
527 MODULE = Lexical::Types PACKAGE = Lexical::Types
533 if (!lt_initialized++) {
535 #if LT_THREADSAFE || LT_WORKAROUND_REQUIRE_PROPAGATION
537 MY_CXT.tbl = ptable_new();
543 lt_op_map = ptable_new();
545 MUTEX_INIT(<_op_map_mutex);
548 lt_default_meth = newSVpvn("TYPEDSCALAR", 11);
549 SvREADONLY_on(lt_default_meth);
551 PERL_HASH(lt_hash, __PACKAGE__, __PACKAGE_LEN__);
553 lt_old_ck_padany = PL_check[OP_PADANY];
554 PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_ck_padany);
555 lt_old_ck_padsv = PL_check[OP_PADSV];
556 PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_ck_padsv);
558 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
559 newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
575 ud.tbl = t = ptable_new();
576 ud.owner = MY_CXT.owner;
577 ptable_walk(MY_CXT.tbl, lt_ptable_hints_clone, &ud);
585 level = PerlMemShared_malloc(sizeof *level);
588 SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
598 RETVAL = lt_tag(value);