1 /* This file is part of the indirect Perl module.
2 * See http://search.cpan.org/dist/indirect/ */
4 #define PERL_NO_GET_CONTEXT
9 #define __PACKAGE__ "indirect"
10 #define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
12 /* --- Compatibility wrappers ---------------------------------------------- */
23 # define SvPV_const SvPV
26 #ifndef SvPV_nolen_const
27 # define SvPV_nolen_const SvPV_nolen
31 # define SvPVX_const SvPVX
34 #ifndef sv_catpvn_nomg
35 # define sv_catpvn_nomg sv_catpvn
39 # define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
43 # define HvNAME_get(H) HvNAME(H)
47 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
51 # define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
54 #define I_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
56 #if I_HAS_PERL(5, 10, 0) || defined(PL_parser)
57 # ifndef PL_lex_inwhat
58 # define PL_lex_inwhat PL_parser->lex_inwhat
61 # define PL_linestr PL_parser->linestr
64 # define PL_bufptr PL_parser->bufptr
67 # define PL_oldbufptr PL_parser->oldbufptr
70 # ifndef PL_lex_inwhat
71 # define PL_lex_inwhat PL_Ilex_inwhat
74 # define PL_linestr PL_Ilinestr
77 # define PL_bufptr PL_Ibufptr
80 # define PL_oldbufptr PL_Ioldbufptr
84 /* ... Thread safety and multiplicity ...................................... */
86 #ifndef I_MULTIPLICITY
87 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
88 # define I_MULTIPLICITY 1
90 # define I_MULTIPLICITY 0
93 #if I_MULTIPLICITY && !defined(tTHX)
94 # define tTHX PerlInterpreter*
97 #if I_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))
98 # define I_THREADSAFE 1
100 # define MY_CXT_CLONE \
102 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
103 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
104 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
107 # define I_THREADSAFE 0
109 # define dMY_CXT dNOOP
111 # define MY_CXT indirect_globaldata
113 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
115 # define MY_CXT_INIT NOOP
117 # define MY_CXT_CLONE NOOP
120 /* --- Helpers ------------------------------------------------------------- */
122 /* ... Pointer table ....................................................... */
124 #define PTABLE_NAME ptable
125 #define PTABLE_VAL_FREE(V) if ((V) && !SvIS_FREED((SV *) (V))) SvREFCNT_dec(V)
134 #define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
135 #define ptable_clear(T) ptable_clear(aTHX_ (T))
136 #define ptable_free(T) ptable_free(aTHX_ (T))
138 /* ... Thread-safe hints ................................................... */
140 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
158 #endif /* I_THREADSAFE */
164 STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
168 if (ud->owner != aTHX) {
170 AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
171 param.stashes = stashes;
173 param.proto_perl = ud->owner;
174 val = sv_dup(val, ¶m);
177 SvREFCNT_dec(stashes);
181 ptable_store(ud->tbl, ent->key, val);
185 STATIC void indirect_thread_cleanup(pTHX_ void *);
187 STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
193 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
197 PerlMemShared_free(level);
198 ptable_free(MY_CXT.map);
199 ptable_free(MY_CXT.tbl);
203 STATIC SV *indirect_tag(pTHX_ SV *value) {
204 #define indirect_tag(V) indirect_tag(aTHX_ (V))
207 value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
208 /* We only need for the key to be an unique tag for looking up the value later.
209 * Allocated memory provides convenient unique identifiers, so that's why we
210 * use the value pointer as the key itself. */
211 ptable_store(MY_CXT.tbl, value, value);
214 return newSVuv(PTR2UV(value));
217 STATIC SV *indirect_detag(pTHX_ const SV *hint) {
218 #define indirect_detag(H) indirect_detag(aTHX_ (H))
222 if (!hint || !SvOK(hint) || !SvIOK(hint))
225 tag = INT2PTR(void *, SvIVX(hint));
228 value = ptable_fetch(MY_CXT.tbl, tag);
236 STATIC SV *indirect_tag(pTHX_ SV *value) {
237 #define indirect_tag(V) indirect_tag(aTHX_ (V))
240 if (SvOK(value) && SvROK(value)) {
249 #define indirect_detag(H) INT2PTR(SV *, SvUVX(H))
251 #endif /* I_THREADSAFE */
253 STATIC U32 indirect_hash = 0;
255 STATIC SV *indirect_hint(pTHX) {
256 #define indirect_hint() indirect_hint(aTHX)
258 #if I_HAS_PERL(5, 9, 5)
259 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
261 __PACKAGE__, __PACKAGE_LEN__,
265 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
271 return (hint && SvOK(hint)) ? hint : NULL;
274 /* ... op -> source position ............................................... */
276 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
277 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
281 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
282 * In this case the linestr has temporarly changed, but the old buffer should
283 * still be alive somewhere. */
285 if (!PL_lex_inwhat) {
286 const char *pl_linestr = SvPVX_const(PL_linestr);
287 if (MY_CXT.linestr != pl_linestr) {
288 ptable_clear(MY_CXT.map);
289 MY_CXT.linestr = pl_linestr;
294 SvUPGRADE(val, SVt_PVIV);
295 SvUVX(val) = PTR2UV(src);
300 ptable_store(MY_CXT.map, o, val);
303 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
304 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
308 if (MY_CXT.linestr != SvPVX_const(PL_linestr))
311 val = ptable_fetch(MY_CXT.map, o);
318 return INT2PTR(const char *, SvUVX(val));
321 /* --- Check functions ----------------------------------------------------- */
323 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
324 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
326 const char *p = NULL, *r = SvPV_const(sv, len);
328 if (len >= 1 && *r == '$') {
341 p = strstr(p + 1, r);
347 /* ... ck_const ............................................................ */
349 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
351 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
352 o = CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
354 if (indirect_hint()) {
356 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV))
357 indirect_map_store(o, indirect_find(sv, PL_oldbufptr), sv);
363 /* ... ck_rv2sv ............................................................ */
365 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
367 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
368 if (indirect_hint()) {
369 OP *op = cUNOPo->op_first;
371 const char *name = NULL, *s;
373 OPCODE type = (OPCODE) op->op_type;
378 GV *gv = cGVOPx_gv(op);
384 if ((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP) {
385 SV *nsv = cSVOPx_sv(op);
386 if (SvPOK(nsv) && (SvTYPE(nsv) >= SVt_PV))
387 name = SvPV_const(nsv, len);
393 sv = sv_2mortal(newSVpvn("$", 1));
394 sv_catpvn_nomg(sv, name, len);
395 s = indirect_find(sv, PL_oldbufptr);
396 if (!s) { /* If it failed, retry without the current stash */
397 const char *stash = HvNAME_get(PL_curstash);
398 STRLEN stashlen = HvNAMELEN_get(PL_curstash);
400 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
401 || name[stashlen] != ':' || name[stashlen+1] != ':') {
402 /* Failed again ? Try to remove main */
405 if ((len < stashlen + 2) || strnNE(name, stash, stashlen)
406 || name[stashlen] != ':' || name[stashlen+1] != ':')
410 sv_setpvn(sv, "$", 1);
412 sv_catpvn_nomg(sv, name + stashlen, len - stashlen);
413 s = indirect_find(sv, PL_oldbufptr);
418 o = CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
419 indirect_map_store(o, s, sv);
424 return CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
427 /* ... ck_padany ........................................................... */
429 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
431 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
432 o = CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
434 if (indirect_hint()) {
436 const char *s = PL_oldbufptr, *t = PL_bufptr - 1;
438 while (s < t && isSPACE(*s)) ++s;
439 if (*s == '$' && ++s <= t) {
440 while (s < t && isSPACE(*s)) ++s;
441 while (s < t && isSPACE(*t)) --t;
442 sv = sv_2mortal(newSVpvn("$", 1));
443 sv_catpvn_nomg(sv, s, t - s + 1);
444 indirect_map_store(o, s, sv);
451 /* ... ck_method ........................................................... */
453 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
455 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
456 if (indirect_hint()) {
457 OP *op = cUNOPo->op_first;
459 const char *s = indirect_map_fetch(op, &sv);
462 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
464 sv = sv_mortalcopy(sv);
465 s = indirect_find(sv, PL_oldbufptr);
467 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
468 /* o may now be a method_named */
469 indirect_map_store(o, s, sv);
474 return CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
477 /* ... ck_entersub ......................................................... */
479 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
481 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
482 SV *hint = indirect_hint();
484 o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
487 const char *mpos, *opos;
488 SV *mnamesv, *onamesv;
494 lop = (LISTOP *) oop;
495 if (!(lop->op_flags & OPf_KIDS))
498 } while (oop->op_type != OP_PUSHMARK);
499 oop = oop->op_sibling;
502 if (mop->op_type == OP_METHOD)
503 mop = cUNOPx(mop)->op_first;
504 else if (mop->op_type != OP_METHOD_NAMED)
507 mpos = indirect_map_fetch(mop, &mnamesv);
511 opos = indirect_map_fetch(oop, &onamesv);
516 SV *code = indirect_detag(hint);
526 onamesv = sv_mortalcopy(onamesv);
527 mnamesv = sv_mortalcopy(mnamesv);
530 file = sv_2mortal(newSVpv(CopFILE(&PL_compiling), 0));
532 file = sv_mortalcopy(CopFILESV(&PL_compiling));
534 line = CopLINE(&PL_compiling);
544 call_sv(code, G_VOID);
558 STATIC U32 indirect_initialized = 0;
560 /* --- XS ------------------------------------------------------------------ */
562 MODULE = indirect PACKAGE = indirect
568 if (!indirect_initialized++) {
572 MY_CXT.map = ptable_new();
573 MY_CXT.linestr = NULL;
575 MY_CXT.tbl = ptable_new();
579 PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
581 indirect_old_ck_const = PL_check[OP_CONST];
582 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
583 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
584 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
585 indirect_old_ck_padany = PL_check[OP_PADANY];
586 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
587 indirect_old_ck_method = PL_check[OP_METHOD];
588 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
589 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
590 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);
592 stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
593 newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
609 ud.tbl = t = ptable_new();
610 ud.owner = MY_CXT.owner;
611 ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
615 MY_CXT.map = ptable_new();
616 MY_CXT.linestr = NULL;
621 level = PerlMemShared_malloc(sizeof *level);
624 SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
634 RETVAL = indirect_tag(value);