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e1a479c5 |
1 | /* mro.c |
2 | * |
3 | * Copyright (c) 2007 Brandon L Black |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
8 | */ |
9 | |
10 | /* |
cac98860 |
11 | * "Which order shall we go in?" said Frodo. "Eldest first, or quickest first? |
12 | * You'll be last either way, Master Peregrin." |
13 | */ |
14 | |
15 | /* |
e1a479c5 |
16 | =head1 MRO Functions |
17 | |
18 | These functions are related to the method resolution order of perl classes |
19 | |
20 | =cut |
21 | */ |
22 | |
23 | #include "EXTERN.h" |
24 | #include "perl.h" |
25 | |
26 | struct mro_meta* |
27 | Perl_mro_meta_init(pTHX_ HV* stash) |
28 | { |
9fe4aecf |
29 | struct mro_meta* newmeta; |
e1a479c5 |
30 | |
31 | assert(stash); |
32 | assert(HvAUX(stash)); |
33 | assert(!(HvAUX(stash)->xhv_mro_meta)); |
183086be |
34 | Newxz(newmeta, 1, struct mro_meta); |
9fe4aecf |
35 | HvAUX(stash)->xhv_mro_meta = newmeta; |
dd69841b |
36 | newmeta->cache_gen = 1; |
70cd14a1 |
37 | newmeta->pkg_gen = 1; |
e1a479c5 |
38 | |
39 | return newmeta; |
40 | } |
41 | |
42 | #if defined(USE_ITHREADS) |
43 | |
44 | /* for sv_dup on new threads */ |
45 | struct mro_meta* |
46 | Perl_mro_meta_dup(pTHX_ struct mro_meta* smeta, CLONE_PARAMS* param) |
47 | { |
e1a479c5 |
48 | struct mro_meta* newmeta; |
49 | |
50 | assert(smeta); |
51 | |
33e12d9d |
52 | Newx(newmeta, 1, struct mro_meta); |
53 | Copy(smeta, newmeta, 1, struct mro_meta); |
54 | |
55 | if (newmeta->mro_linear_dfs) |
56 | newmeta->mro_linear_dfs |
57 | = (AV*) SvREFCNT_inc(sv_dup((SV*)newmeta->mro_linear_dfs, param)); |
58 | if (newmeta->mro_linear_c3) |
59 | newmeta->mro_linear_c3 |
60 | = (AV*) SvREFCNT_inc(sv_dup((SV*)newmeta->mro_linear_c3, param)); |
33e12d9d |
61 | if (newmeta->mro_nextmethod) |
62 | newmeta->mro_nextmethod |
63 | = (HV*) SvREFCNT_inc(sv_dup((SV*)newmeta->mro_nextmethod, param)); |
e1a479c5 |
64 | |
65 | return newmeta; |
66 | } |
67 | |
68 | #endif /* USE_ITHREADS */ |
69 | |
70 | /* |
71 | =for apidoc mro_get_linear_isa_dfs |
72 | |
73 | Returns the Depth-First Search linearization of @ISA |
74 | the given stash. The return value is a read-only AV*. |
75 | C<level> should be 0 (it is used internally in this |
76 | function's recursion). |
77 | |
1c908217 |
78 | You are responsible for C<SvREFCNT_inc()> on the |
79 | return value if you plan to store it anywhere |
80 | semi-permanently (otherwise it might be deleted |
81 | out from under you the next time the cache is |
82 | invalidated). |
83 | |
e1a479c5 |
84 | =cut |
85 | */ |
86 | AV* |
87 | Perl_mro_get_linear_isa_dfs(pTHX_ HV *stash, I32 level) |
88 | { |
89 | AV* retval; |
90 | GV** gvp; |
91 | GV* gv; |
92 | AV* av; |
e1a479c5 |
93 | const char* stashname; |
94 | struct mro_meta* meta; |
95 | |
96 | assert(stash); |
97 | assert(HvAUX(stash)); |
98 | |
99 | stashname = HvNAME_get(stash); |
100 | if (!stashname) |
1e05feb3 |
101 | Perl_croak(aTHX_ "Can't linearize anonymous symbol table"); |
e1a479c5 |
102 | |
103 | if (level > 100) |
104 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
105 | stashname); |
106 | |
107 | meta = HvMROMETA(stash); |
1c908217 |
108 | |
109 | /* return cache if valid */ |
e1a479c5 |
110 | if((retval = meta->mro_linear_dfs)) { |
e1a479c5 |
111 | return retval; |
112 | } |
113 | |
114 | /* not in cache, make a new one */ |
1c908217 |
115 | |
e1a479c5 |
116 | retval = newAV(); |
117 | av_push(retval, newSVpv(stashname, 0)); /* add ourselves at the top */ |
118 | |
1c908217 |
119 | /* fetch our @ISA */ |
e1a479c5 |
120 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
121 | av = (gvp && (gv = *gvp) && isGV_with_GP(gv)) ? GvAV(gv) : NULL; |
122 | |
640da897 |
123 | if(av && AvFILLp(av) >= 0) { |
1c908217 |
124 | |
125 | /* "stored" is used to keep track of all of the classnames |
126 | we have added to the MRO so far, so we can do a quick |
127 | exists check and avoid adding duplicate classnames to |
128 | the MRO as we go. */ |
129 | |
1e05feb3 |
130 | HV* const stored = (HV*)sv_2mortal((SV*)newHV()); |
ffd8da72 |
131 | SV **svp = AvARRAY(av); |
132 | I32 items = AvFILLp(av) + 1; |
1c908217 |
133 | |
134 | /* foreach(@ISA) */ |
e1a479c5 |
135 | while (items--) { |
136 | SV* const sv = *svp++; |
137 | HV* const basestash = gv_stashsv(sv, 0); |
ffd8da72 |
138 | SV *const *subrv_p; |
139 | I32 subrv_items; |
e1a479c5 |
140 | |
141 | if (!basestash) { |
1c908217 |
142 | /* if no stash exists for this @ISA member, |
143 | simply add it to the MRO and move on */ |
ffd8da72 |
144 | subrv_p = &sv; |
145 | subrv_items = 1; |
e1a479c5 |
146 | } |
147 | else { |
1c908217 |
148 | /* otherwise, recurse into ourselves for the MRO |
149 | of this @ISA member, and append their MRO to ours */ |
ffd8da72 |
150 | const AV *const subrv |
151 | = mro_get_linear_isa_dfs(basestash, level + 1); |
152 | |
153 | subrv_p = AvARRAY(subrv); |
154 | subrv_items = AvFILLp(subrv) + 1; |
155 | } |
156 | while(subrv_items--) { |
157 | SV *const subsv = *subrv_p++; |
158 | if(!hv_exists_ent(stored, subsv, 0)) { |
ffd8da72 |
159 | hv_store_ent(stored, subsv, &PL_sv_undef, 0); |
25270bc0 |
160 | av_push(retval, newSVsv(subsv)); |
ffd8da72 |
161 | } |
e1a479c5 |
162 | } |
163 | } |
164 | } |
165 | |
1c908217 |
166 | /* we don't want anyone modifying the cache entry but us, |
167 | and we do so by replacing it completely */ |
e1a479c5 |
168 | SvREADONLY_on(retval); |
1c908217 |
169 | |
e1a479c5 |
170 | meta->mro_linear_dfs = retval; |
171 | return retval; |
172 | } |
173 | |
174 | /* |
175 | =for apidoc mro_get_linear_isa_c3 |
176 | |
177 | Returns the C3 linearization of @ISA |
178 | the given stash. The return value is a read-only AV*. |
179 | C<level> should be 0 (it is used internally in this |
180 | function's recursion). |
181 | |
1c908217 |
182 | You are responsible for C<SvREFCNT_inc()> on the |
183 | return value if you plan to store it anywhere |
184 | semi-permanently (otherwise it might be deleted |
185 | out from under you the next time the cache is |
186 | invalidated). |
187 | |
e1a479c5 |
188 | =cut |
189 | */ |
190 | |
191 | AV* |
192 | Perl_mro_get_linear_isa_c3(pTHX_ HV* stash, I32 level) |
193 | { |
194 | AV* retval; |
195 | GV** gvp; |
196 | GV* gv; |
197 | AV* isa; |
198 | const char* stashname; |
199 | STRLEN stashname_len; |
200 | struct mro_meta* meta; |
201 | |
202 | assert(stash); |
203 | assert(HvAUX(stash)); |
204 | |
205 | stashname = HvNAME_get(stash); |
206 | stashname_len = HvNAMELEN_get(stash); |
207 | if (!stashname) |
1e05feb3 |
208 | Perl_croak(aTHX_ "Can't linearize anonymous symbol table"); |
e1a479c5 |
209 | |
210 | if (level > 100) |
211 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
212 | stashname); |
213 | |
214 | meta = HvMROMETA(stash); |
1c908217 |
215 | |
216 | /* return cache if valid */ |
e1a479c5 |
217 | if((retval = meta->mro_linear_c3)) { |
e1a479c5 |
218 | return retval; |
219 | } |
220 | |
221 | /* not in cache, make a new one */ |
222 | |
e1a479c5 |
223 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
224 | isa = (gvp && (gv = *gvp) && isGV_with_GP(gv)) ? GvAV(gv) : NULL; |
225 | |
1c908217 |
226 | /* For a better idea how the rest of this works, see the much clearer |
227 | pure perl version in Algorithm::C3 0.01: |
228 | http://search.cpan.org/src/STEVAN/Algorithm-C3-0.01/lib/Algorithm/C3.pm |
229 | (later versions go about it differently than this code for speed reasons) |
230 | */ |
8638e433 |
231 | |
e1a479c5 |
232 | if(isa && AvFILLp(isa) >= 0) { |
233 | SV** seqs_ptr; |
234 | I32 seqs_items; |
1e05feb3 |
235 | HV* const tails = (HV*)sv_2mortal((SV*)newHV()); |
236 | AV* const seqs = (AV*)sv_2mortal((SV*)newAV()); |
8638e433 |
237 | I32* heads; |
238 | |
239 | /* This builds @seqs, which is an array of arrays. |
240 | The members of @seqs are the MROs of |
241 | the members of @ISA, followed by @ISA itself. |
242 | */ |
e1a479c5 |
243 | I32 items = AvFILLp(isa) + 1; |
244 | SV** isa_ptr = AvARRAY(isa); |
245 | while(items--) { |
1e05feb3 |
246 | SV* const isa_item = *isa_ptr++; |
247 | HV* const isa_item_stash = gv_stashsv(isa_item, 0); |
e1a479c5 |
248 | if(!isa_item_stash) { |
8638e433 |
249 | /* if no stash, make a temporary fake MRO |
250 | containing just itself */ |
70cd14a1 |
251 | AV* const isa_lin = newAV(); |
e1a479c5 |
252 | av_push(isa_lin, newSVsv(isa_item)); |
70cd14a1 |
253 | av_push(seqs, (SV*)isa_lin); |
e1a479c5 |
254 | } |
255 | else { |
70cd14a1 |
256 | /* recursion */ |
257 | AV* const isa_lin = mro_get_linear_isa_c3(isa_item_stash, level + 1); |
258 | av_push(seqs, SvREFCNT_inc_simple_NN((SV*)isa_lin)); |
e1a479c5 |
259 | } |
e1a479c5 |
260 | } |
1dcae283 |
261 | av_push(seqs, SvREFCNT_inc_simple_NN((SV*)isa)); |
8638e433 |
262 | |
263 | /* This builds "heads", which as an array of integer array |
264 | indices, one per seq, which point at the virtual "head" |
265 | of the seq (initially zero) */ |
266 | Newxz(heads, AvFILLp(seqs)+1, I32); |
267 | |
268 | /* This builds %tails, which has one key for every class |
269 | mentioned in the tail of any sequence in @seqs (tail meaning |
270 | everything after the first class, the "head"). The value |
271 | is how many times this key appears in the tails of @seqs. |
272 | */ |
e1a479c5 |
273 | seqs_ptr = AvARRAY(seqs); |
274 | seqs_items = AvFILLp(seqs) + 1; |
275 | while(seqs_items--) { |
1e05feb3 |
276 | AV* const seq = (AV*)*seqs_ptr++; |
e1a479c5 |
277 | I32 seq_items = AvFILLp(seq); |
278 | if(seq_items > 0) { |
279 | SV** seq_ptr = AvARRAY(seq) + 1; |
280 | while(seq_items--) { |
1e05feb3 |
281 | SV* const seqitem = *seq_ptr++; |
282 | HE* const he = hv_fetch_ent(tails, seqitem, 0, 0); |
e1a479c5 |
283 | if(!he) { |
284 | hv_store_ent(tails, seqitem, newSViv(1), 0); |
285 | } |
286 | else { |
1e05feb3 |
287 | SV* const val = HeVAL(he); |
e1a479c5 |
288 | sv_inc(val); |
289 | } |
290 | } |
291 | } |
292 | } |
293 | |
1dcae283 |
294 | /* Initialize retval to build the return value in */ |
295 | retval = newAV(); |
296 | av_push(retval, newSVpvn(stashname, stashname_len)); /* us first */ |
297 | |
8638e433 |
298 | /* This loop won't terminate until we either finish building |
299 | the MRO, or get an exception. */ |
e1a479c5 |
300 | while(1) { |
e1a479c5 |
301 | SV* cand = NULL; |
302 | SV* winner = NULL; |
8638e433 |
303 | int s; |
304 | |
305 | /* "foreach $seq (@seqs)" */ |
1e05feb3 |
306 | SV** const avptr = AvARRAY(seqs); |
8638e433 |
307 | for(s = 0; s <= AvFILLp(seqs); s++) { |
e1a479c5 |
308 | SV** svp; |
1e05feb3 |
309 | AV * const seq = (AV*)(avptr[s]); |
310 | SV* seqhead; |
8638e433 |
311 | if(!seq) continue; /* skip empty seqs */ |
312 | svp = av_fetch(seq, heads[s], 0); |
313 | seqhead = *svp; /* seqhead = head of this seq */ |
e1a479c5 |
314 | if(!winner) { |
1e05feb3 |
315 | HE* tail_entry; |
316 | SV* val; |
8638e433 |
317 | /* if we haven't found a winner for this round yet, |
318 | and this seqhead is not in tails (or the count |
319 | for it in tails has dropped to zero), then this |
320 | seqhead is our new winner, and is added to the |
321 | final MRO immediately */ |
e1a479c5 |
322 | cand = seqhead; |
323 | if((tail_entry = hv_fetch_ent(tails, cand, 0, 0)) |
324 | && (val = HeVAL(tail_entry)) |
25270bc0 |
325 | && (SvIVX(val) > 0)) |
e1a479c5 |
326 | continue; |
327 | winner = newSVsv(cand); |
328 | av_push(retval, winner); |
8638e433 |
329 | /* note however that even when we find a winner, |
330 | we continue looping over @seqs to do housekeeping */ |
e1a479c5 |
331 | } |
332 | if(!sv_cmp(seqhead, winner)) { |
8638e433 |
333 | /* Once we have a winner (including the iteration |
334 | where we first found him), inc the head ptr |
335 | for any seq which had the winner as a head, |
336 | NULL out any seq which is now empty, |
337 | and adjust tails for consistency */ |
338 | |
1e05feb3 |
339 | const int new_head = ++heads[s]; |
8638e433 |
340 | if(new_head > AvFILLp(seq)) { |
1dcae283 |
341 | SvREFCNT_dec(avptr[s]); |
8638e433 |
342 | avptr[s] = NULL; |
343 | } |
344 | else { |
1e05feb3 |
345 | HE* tail_entry; |
346 | SV* val; |
8638e433 |
347 | /* Because we know this new seqhead used to be |
348 | a tail, we can assume it is in tails and has |
349 | a positive value, which we need to dec */ |
350 | svp = av_fetch(seq, new_head, 0); |
351 | seqhead = *svp; |
352 | tail_entry = hv_fetch_ent(tails, seqhead, 0, 0); |
353 | val = HeVAL(tail_entry); |
354 | sv_dec(val); |
355 | } |
e1a479c5 |
356 | } |
357 | } |
8638e433 |
358 | |
359 | /* if we found no candidates, we are done building the MRO. |
360 | !cand means no seqs have any entries left to check */ |
361 | if(!cand) { |
362 | Safefree(heads); |
363 | break; |
364 | } |
365 | |
366 | /* If we had candidates, but nobody won, then the @ISA |
367 | hierarchy is not C3-incompatible */ |
e1a479c5 |
368 | if(!winner) { |
8638e433 |
369 | /* we have to do some cleanup before we croak */ |
8638e433 |
370 | |
e1a479c5 |
371 | SvREFCNT_dec(retval); |
8638e433 |
372 | Safefree(heads); |
373 | |
e1a479c5 |
374 | Perl_croak(aTHX_ "Inconsistent hierarchy during C3 merge of class '%s': " |
375 | "merging failed on parent '%"SVf"'", stashname, SVfARG(cand)); |
376 | } |
377 | } |
378 | } |
1dcae283 |
379 | else { /* @ISA was undefined or empty */ |
380 | /* build a retval containing only ourselves */ |
381 | retval = newAV(); |
382 | av_push(retval, newSVpvn(stashname, stashname_len)); |
383 | } |
e1a479c5 |
384 | |
1c908217 |
385 | /* we don't want anyone modifying the cache entry but us, |
386 | and we do so by replacing it completely */ |
e1a479c5 |
387 | SvREADONLY_on(retval); |
1c908217 |
388 | |
e1a479c5 |
389 | meta->mro_linear_c3 = retval; |
390 | return retval; |
391 | } |
392 | |
393 | /* |
394 | =for apidoc mro_get_linear_isa |
395 | |
396 | Returns either C<mro_get_linear_isa_c3> or |
397 | C<mro_get_linear_isa_dfs> for the given stash, |
398 | dependant upon which MRO is in effect |
399 | for that stash. The return value is a |
400 | read-only AV*. |
401 | |
1c908217 |
402 | You are responsible for C<SvREFCNT_inc()> on the |
403 | return value if you plan to store it anywhere |
404 | semi-permanently (otherwise it might be deleted |
405 | out from under you the next time the cache is |
406 | invalidated). |
407 | |
e1a479c5 |
408 | =cut |
409 | */ |
410 | AV* |
411 | Perl_mro_get_linear_isa(pTHX_ HV *stash) |
412 | { |
413 | struct mro_meta* meta; |
2c7f4b87 |
414 | |
e1a479c5 |
415 | assert(stash); |
2c7f4b87 |
416 | if(!SvOOK(stash)) |
417 | Perl_croak(aTHX_ "Can't linearize anonymous symbol table"); |
e1a479c5 |
418 | |
419 | meta = HvMROMETA(stash); |
420 | if(meta->mro_which == MRO_DFS) { |
421 | return mro_get_linear_isa_dfs(stash, 0); |
422 | } else if(meta->mro_which == MRO_C3) { |
423 | return mro_get_linear_isa_c3(stash, 0); |
424 | } else { |
14f97ce6 |
425 | Perl_croak(aTHX_ "panic: invalid MRO!"); |
e1a479c5 |
426 | } |
7caa839c |
427 | return NULL; /* NOT REACHED */ |
e1a479c5 |
428 | } |
429 | |
430 | /* |
431 | =for apidoc mro_isa_changed_in |
432 | |
1c908217 |
433 | Takes the necessary steps (cache invalidations, mostly) |
e1a479c5 |
434 | when the @ISA of the given package has changed. Invoked |
435 | by the C<setisa> magic, should not need to invoke directly. |
436 | |
437 | =cut |
438 | */ |
439 | void |
440 | Perl_mro_isa_changed_in(pTHX_ HV* stash) |
441 | { |
442 | dVAR; |
443 | HV* isarev; |
444 | AV* linear_mro; |
445 | HE* iter; |
446 | SV** svp; |
447 | I32 items; |
1e05feb3 |
448 | bool is_universal; |
2c7f4b87 |
449 | struct mro_meta * meta; |
e1a479c5 |
450 | |
1e05feb3 |
451 | const char * const stashname = HvNAME_get(stash); |
452 | const STRLEN stashname_len = HvNAMELEN_get(stash); |
e1a479c5 |
453 | |
2c7f4b87 |
454 | if(!stashname) |
455 | Perl_croak(aTHX_ "Can't call mro_isa_changed_in() on anonymous symbol table"); |
456 | |
e1a479c5 |
457 | /* wipe out the cached linearizations for this stash */ |
2c7f4b87 |
458 | meta = HvMROMETA(stash); |
e1a479c5 |
459 | SvREFCNT_dec((SV*)meta->mro_linear_dfs); |
460 | SvREFCNT_dec((SV*)meta->mro_linear_c3); |
461 | meta->mro_linear_dfs = NULL; |
462 | meta->mro_linear_c3 = NULL; |
463 | |
70cd14a1 |
464 | /* Inc the package generation, since our @ISA changed */ |
465 | meta->pkg_gen++; |
466 | |
e1a479c5 |
467 | /* Wipe the global method cache if this package |
468 | is UNIVERSAL or one of its parents */ |
dd69841b |
469 | |
470 | svp = hv_fetch(PL_isarev, stashname, stashname_len, 0); |
471 | isarev = svp ? (HV*)*svp : NULL; |
472 | |
473 | if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL")) |
474 | || (isarev && hv_exists(isarev, "UNIVERSAL", 9))) { |
e1a479c5 |
475 | PL_sub_generation++; |
dd69841b |
476 | is_universal = TRUE; |
477 | } |
1e05feb3 |
478 | else { /* Wipe the local method cache otherwise */ |
dd69841b |
479 | meta->cache_gen++; |
1e05feb3 |
480 | is_universal = FALSE; |
481 | } |
e1a479c5 |
482 | |
483 | /* wipe next::method cache too */ |
484 | if(meta->mro_nextmethod) hv_clear(meta->mro_nextmethod); |
1e05feb3 |
485 | |
e1a479c5 |
486 | /* Iterate the isarev (classes that are our children), |
487 | wiping out their linearization and method caches */ |
dd69841b |
488 | if(isarev) { |
e1a479c5 |
489 | hv_iterinit(isarev); |
490 | while((iter = hv_iternext(isarev))) { |
1e05feb3 |
491 | SV* const revkey = hv_iterkeysv(iter); |
e1a479c5 |
492 | HV* revstash = gv_stashsv(revkey, 0); |
bc2cbbac |
493 | struct mro_meta* revmeta; |
494 | |
495 | if(!revstash) continue; |
496 | revmeta = HvMROMETA(revstash); |
e1a479c5 |
497 | SvREFCNT_dec((SV*)revmeta->mro_linear_dfs); |
498 | SvREFCNT_dec((SV*)revmeta->mro_linear_c3); |
499 | revmeta->mro_linear_dfs = NULL; |
500 | revmeta->mro_linear_c3 = NULL; |
dd69841b |
501 | if(!is_universal) |
502 | revmeta->cache_gen++; |
e1a479c5 |
503 | if(revmeta->mro_nextmethod) |
504 | hv_clear(revmeta->mro_nextmethod); |
505 | } |
506 | } |
507 | |
1c908217 |
508 | /* Now iterate our MRO (parents), and do a few things: |
509 | 1) instantiate with the "fake" flag if they don't exist |
510 | 2) flag them as universal if we are universal |
511 | 3) Add everything from our isarev to their isarev |
512 | */ |
513 | |
514 | /* We're starting at the 2nd element, skipping ourselves here */ |
e1a479c5 |
515 | linear_mro = mro_get_linear_isa(stash); |
516 | svp = AvARRAY(linear_mro) + 1; |
517 | items = AvFILLp(linear_mro); |
1c908217 |
518 | |
e1a479c5 |
519 | while (items--) { |
520 | SV* const sv = *svp++; |
e1a479c5 |
521 | HV* mroisarev; |
522 | |
1e05feb3 |
523 | HE *he = hv_fetch_ent(PL_isarev, sv, 0, 0); |
dd69841b |
524 | if(!he) { |
525 | he = hv_store_ent(PL_isarev, sv, (SV*)newHV(), 0); |
e1a479c5 |
526 | } |
dd69841b |
527 | mroisarev = (HV*)HeVAL(he); |
e1a479c5 |
528 | |
25270bc0 |
529 | /* This hash only ever contains PL_sv_yes. Storing it over itself is |
530 | almost as cheap as calling hv_exists, so on aggregate we expect to |
531 | save time by not making two calls to the common HV code for the |
532 | case where it doesn't exist. */ |
533 | |
dd69841b |
534 | hv_store(mroisarev, stashname, stashname_len, &PL_sv_yes, 0); |
e1a479c5 |
535 | |
536 | if(isarev) { |
537 | hv_iterinit(isarev); |
538 | while((iter = hv_iternext(isarev))) { |
dd69841b |
539 | I32 revkeylen; |
1e05feb3 |
540 | char* const revkey = hv_iterkey(iter, &revkeylen); |
dd69841b |
541 | hv_store(mroisarev, revkey, revkeylen, &PL_sv_yes, 0); |
e1a479c5 |
542 | } |
543 | } |
544 | } |
545 | } |
546 | |
547 | /* |
548 | =for apidoc mro_method_changed_in |
549 | |
47c9dd14 |
550 | Invalidates method caching on any child classes |
551 | of the given stash, so that they might notice |
552 | the changes in this one. |
e1a479c5 |
553 | |
554 | Ideally, all instances of C<PL_sub_generation++> in |
dd69841b |
555 | perl source outside of C<mro.c> should be |
556 | replaced by calls to this. |
557 | |
558 | Perl automatically handles most of the common |
559 | ways a method might be redefined. However, there |
560 | are a few ways you could change a method in a stash |
561 | without the cache code noticing, in which case you |
562 | need to call this method afterwards: |
e1a479c5 |
563 | |
dd69841b |
564 | 1) Directly manipulating the stash HV entries from |
565 | XS code. |
e1a479c5 |
566 | |
dd69841b |
567 | 2) Assigning a reference to a readonly scalar |
568 | constant into a stash entry in order to create |
569 | a constant subroutine (like constant.pm |
570 | does). |
571 | |
572 | This same method is available from pure perl |
573 | via, C<mro::method_changed_in(classname)>. |
e1a479c5 |
574 | |
575 | =cut |
576 | */ |
577 | void |
578 | Perl_mro_method_changed_in(pTHX_ HV *stash) |
579 | { |
1e05feb3 |
580 | const char * const stashname = HvNAME_get(stash); |
581 | const STRLEN stashname_len = HvNAMELEN_get(stash); |
dd69841b |
582 | |
1e05feb3 |
583 | SV ** const svp = hv_fetch(PL_isarev, stashname, stashname_len, 0); |
584 | HV * const isarev = svp ? (HV*)*svp : NULL; |
e1a479c5 |
585 | |
2c7f4b87 |
586 | if(!stashname) |
587 | Perl_croak(aTHX_ "Can't call mro_method_changed_in() on anonymous symbol table"); |
588 | |
70cd14a1 |
589 | /* Inc the package generation, since a local method changed */ |
590 | HvMROMETA(stash)->pkg_gen++; |
591 | |
e1a479c5 |
592 | /* If stash is UNIVERSAL, or one of UNIVERSAL's parents, |
593 | invalidate all method caches globally */ |
dd69841b |
594 | if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL")) |
595 | || (isarev && hv_exists(isarev, "UNIVERSAL", 9))) { |
e1a479c5 |
596 | PL_sub_generation++; |
597 | return; |
598 | } |
599 | |
600 | /* else, invalidate the method caches of all child classes, |
601 | but not itself */ |
dd69841b |
602 | if(isarev) { |
1e05feb3 |
603 | HE* iter; |
604 | |
e1a479c5 |
605 | hv_iterinit(isarev); |
606 | while((iter = hv_iternext(isarev))) { |
1e05feb3 |
607 | SV* const revkey = hv_iterkeysv(iter); |
608 | HV* const revstash = gv_stashsv(revkey, 0); |
bc2cbbac |
609 | struct mro_meta* mrometa; |
610 | |
611 | if(!revstash) continue; |
612 | mrometa = HvMROMETA(revstash); |
dd69841b |
613 | mrometa->cache_gen++; |
e1a479c5 |
614 | if(mrometa->mro_nextmethod) |
615 | hv_clear(mrometa->mro_nextmethod); |
616 | } |
617 | } |
618 | } |
619 | |
620 | /* These two are static helpers for next::method and friends, |
621 | and re-implement a bunch of the code from pp_caller() in |
622 | a more efficient manner for this particular usage. |
623 | */ |
624 | |
625 | STATIC I32 |
626 | __dopoptosub_at(const PERL_CONTEXT *cxstk, I32 startingblock) { |
627 | I32 i; |
628 | for (i = startingblock; i >= 0; i--) { |
629 | if(CxTYPE((PERL_CONTEXT*)(&cxstk[i])) == CXt_SUB) return i; |
630 | } |
631 | return i; |
632 | } |
633 | |
e1a479c5 |
634 | #include "XSUB.h" |
635 | |
636 | XS(XS_mro_get_linear_isa); |
637 | XS(XS_mro_set_mro); |
638 | XS(XS_mro_get_mro); |
639 | XS(XS_mro_get_isarev); |
640 | XS(XS_mro_is_universal); |
c5860d66 |
641 | XS(XS_mro_invalidate_method_caches); |
e1a479c5 |
642 | XS(XS_mro_method_changed_in); |
70cd14a1 |
643 | XS(XS_mro_get_pkg_gen); |
f58cd386 |
644 | XS(XS_mro_nextcan); |
e1a479c5 |
645 | |
646 | void |
647 | Perl_boot_core_mro(pTHX) |
648 | { |
649 | dVAR; |
650 | static const char file[] = __FILE__; |
651 | |
652 | newXSproto("mro::get_linear_isa", XS_mro_get_linear_isa, file, "$;$"); |
653 | newXSproto("mro::set_mro", XS_mro_set_mro, file, "$$"); |
654 | newXSproto("mro::get_mro", XS_mro_get_mro, file, "$"); |
655 | newXSproto("mro::get_isarev", XS_mro_get_isarev, file, "$"); |
656 | newXSproto("mro::is_universal", XS_mro_is_universal, file, "$"); |
c5860d66 |
657 | newXSproto("mro::invalidate_all_method_caches", XS_mro_invalidate_method_caches, file, ""); |
e1a479c5 |
658 | newXSproto("mro::method_changed_in", XS_mro_method_changed_in, file, "$"); |
70cd14a1 |
659 | newXSproto("mro::get_pkg_gen", XS_mro_get_pkg_gen, file, "$"); |
f58cd386 |
660 | newXS("mro::_nextcan", XS_mro_nextcan, file); |
e1a479c5 |
661 | } |
662 | |
663 | XS(XS_mro_get_linear_isa) { |
664 | dVAR; |
665 | dXSARGS; |
666 | AV* RETVAL; |
667 | HV* class_stash; |
668 | SV* classname; |
669 | |
670 | PERL_UNUSED_ARG(cv); |
671 | |
672 | if(items < 1 || items > 2) |
673 | Perl_croak(aTHX_ "Usage: mro::get_linear_isa(classname [, type ])"); |
674 | |
675 | classname = ST(0); |
676 | class_stash = gv_stashsv(classname, 0); |
e1a479c5 |
677 | |
70cd14a1 |
678 | if(!class_stash) { |
679 | /* No stash exists yet, give them just the classname */ |
680 | AV* isalin = newAV(); |
681 | av_push(isalin, newSVsv(classname)); |
682 | ST(0) = sv_2mortal(newRV_noinc((SV*)isalin)); |
683 | XSRETURN(1); |
684 | } |
685 | else if(items > 1) { |
1e05feb3 |
686 | const char* const which = SvPV_nolen(ST(1)); |
e1a479c5 |
687 | if(strEQ(which, "dfs")) |
688 | RETVAL = mro_get_linear_isa_dfs(class_stash, 0); |
689 | else if(strEQ(which, "c3")) |
690 | RETVAL = mro_get_linear_isa_c3(class_stash, 0); |
691 | else |
692 | Perl_croak(aTHX_ "Invalid mro name: '%s'", which); |
693 | } |
694 | else { |
695 | RETVAL = mro_get_linear_isa(class_stash); |
696 | } |
697 | |
698 | ST(0) = newRV_inc((SV*)RETVAL); |
699 | sv_2mortal(ST(0)); |
700 | XSRETURN(1); |
701 | } |
702 | |
703 | XS(XS_mro_set_mro) |
704 | { |
705 | dVAR; |
706 | dXSARGS; |
707 | SV* classname; |
708 | char* whichstr; |
709 | mro_alg which; |
710 | HV* class_stash; |
711 | struct mro_meta* meta; |
712 | |
713 | PERL_UNUSED_ARG(cv); |
714 | |
715 | if (items != 2) |
716 | Perl_croak(aTHX_ "Usage: mro::set_mro(classname, type)"); |
717 | |
718 | classname = ST(0); |
719 | whichstr = SvPV_nolen(ST(1)); |
720 | class_stash = gv_stashsv(classname, GV_ADD); |
721 | if(!class_stash) Perl_croak(aTHX_ "Cannot create class: '%"SVf"'!", SVfARG(classname)); |
722 | meta = HvMROMETA(class_stash); |
723 | |
724 | if(strEQ(whichstr, "dfs")) |
725 | which = MRO_DFS; |
726 | else if(strEQ(whichstr, "c3")) |
727 | which = MRO_C3; |
728 | else |
729 | Perl_croak(aTHX_ "Invalid mro name: '%s'", whichstr); |
730 | |
731 | if(meta->mro_which != which) { |
732 | meta->mro_which = which; |
733 | /* Only affects local method cache, not |
734 | even child classes */ |
dd69841b |
735 | meta->cache_gen++; |
e1a479c5 |
736 | if(meta->mro_nextmethod) |
737 | hv_clear(meta->mro_nextmethod); |
738 | } |
739 | |
740 | XSRETURN_EMPTY; |
741 | } |
742 | |
743 | |
744 | XS(XS_mro_get_mro) |
745 | { |
746 | dVAR; |
747 | dXSARGS; |
748 | SV* classname; |
749 | HV* class_stash; |
e1a479c5 |
750 | |
751 | PERL_UNUSED_ARG(cv); |
752 | |
753 | if (items != 1) |
754 | Perl_croak(aTHX_ "Usage: mro::get_mro(classname)"); |
755 | |
756 | classname = ST(0); |
757 | class_stash = gv_stashsv(classname, 0); |
e1a479c5 |
758 | |
70cd14a1 |
759 | if(!class_stash || HvMROMETA(class_stash)->mro_which == MRO_DFS) |
e1a479c5 |
760 | ST(0) = sv_2mortal(newSVpvn("dfs", 3)); |
761 | else |
762 | ST(0) = sv_2mortal(newSVpvn("c3", 2)); |
763 | |
764 | XSRETURN(1); |
765 | } |
766 | |
767 | XS(XS_mro_get_isarev) |
768 | { |
769 | dVAR; |
770 | dXSARGS; |
771 | SV* classname; |
dd69841b |
772 | SV** svp; |
e1a479c5 |
773 | HV* isarev; |
70cd14a1 |
774 | char* classname_pv; |
775 | STRLEN classname_len; |
776 | AV* ret_array; |
e1a479c5 |
777 | |
778 | PERL_UNUSED_ARG(cv); |
779 | |
780 | if (items != 1) |
781 | Perl_croak(aTHX_ "Usage: mro::get_isarev(classname)"); |
782 | |
783 | classname = ST(0); |
784 | |
e1a479c5 |
785 | SP -= items; |
dd69841b |
786 | |
70cd14a1 |
787 | |
788 | classname_pv = SvPV_nolen(classname); |
789 | classname_len = strlen(classname_pv); |
790 | svp = hv_fetch(PL_isarev, classname_pv, classname_len, 0); |
dd69841b |
791 | isarev = svp ? (HV*)*svp : NULL; |
70cd14a1 |
792 | |
793 | ret_array = newAV(); |
dd69841b |
794 | if(isarev) { |
e1a479c5 |
795 | HE* iter; |
796 | hv_iterinit(isarev); |
797 | while((iter = hv_iternext(isarev))) |
70cd14a1 |
798 | av_push(ret_array, newSVsv(hv_iterkeysv(iter))); |
e1a479c5 |
799 | } |
70cd14a1 |
800 | XPUSHs(sv_2mortal(newRV_noinc((SV*)ret_array))); |
e1a479c5 |
801 | |
802 | PUTBACK; |
803 | return; |
804 | } |
805 | |
806 | XS(XS_mro_is_universal) |
807 | { |
808 | dVAR; |
809 | dXSARGS; |
810 | SV* classname; |
dd69841b |
811 | HV* isarev; |
70cd14a1 |
812 | char* classname_pv; |
813 | STRLEN classname_len; |
dd69841b |
814 | SV** svp; |
e1a479c5 |
815 | |
816 | PERL_UNUSED_ARG(cv); |
817 | |
818 | if (items != 1) |
dd69841b |
819 | Perl_croak(aTHX_ "Usage: mro::is_universal(classname)"); |
e1a479c5 |
820 | |
821 | classname = ST(0); |
e1a479c5 |
822 | |
70cd14a1 |
823 | classname_pv = SvPV_nolen(classname); |
824 | classname_len = strlen(classname_pv); |
dd69841b |
825 | |
70cd14a1 |
826 | svp = hv_fetch(PL_isarev, classname_pv, classname_len, 0); |
dd69841b |
827 | isarev = svp ? (HV*)*svp : NULL; |
828 | |
70cd14a1 |
829 | if((classname_len == 9 && strEQ(classname_pv, "UNIVERSAL")) |
dd69841b |
830 | || (isarev && hv_exists(isarev, "UNIVERSAL", 9))) |
9edc5bb8 |
831 | XSRETURN_YES; |
832 | else |
833 | XSRETURN_NO; |
e1a479c5 |
834 | } |
835 | |
c5860d66 |
836 | XS(XS_mro_invalidate_method_caches) |
e1a479c5 |
837 | { |
838 | dVAR; |
839 | dXSARGS; |
840 | |
841 | PERL_UNUSED_ARG(cv); |
842 | |
843 | if (items != 0) |
844 | Perl_croak(aTHX_ "Usage: mro::invalidate_all_method_caches()"); |
845 | |
846 | PL_sub_generation++; |
847 | |
848 | XSRETURN_EMPTY; |
849 | } |
850 | |
e1a479c5 |
851 | XS(XS_mro_method_changed_in) |
852 | { |
853 | dVAR; |
854 | dXSARGS; |
855 | SV* classname; |
856 | HV* class_stash; |
857 | |
858 | PERL_UNUSED_ARG(cv); |
859 | |
860 | if(items != 1) |
861 | Perl_croak(aTHX_ "Usage: mro::method_changed_in(classname)"); |
862 | |
863 | classname = ST(0); |
864 | |
865 | class_stash = gv_stashsv(classname, 0); |
866 | if(!class_stash) Perl_croak(aTHX_ "No such class: '%"SVf"'!", SVfARG(classname)); |
867 | |
868 | mro_method_changed_in(class_stash); |
869 | |
870 | XSRETURN_EMPTY; |
871 | } |
872 | |
70cd14a1 |
873 | XS(XS_mro_get_pkg_gen) |
874 | { |
875 | dVAR; |
876 | dXSARGS; |
877 | SV* classname; |
878 | HV* class_stash; |
879 | |
880 | PERL_UNUSED_ARG(cv); |
881 | |
882 | if(items != 1) |
883 | Perl_croak(aTHX_ "Usage: mro::get_pkg_gen(classname)"); |
884 | |
885 | classname = ST(0); |
886 | |
887 | class_stash = gv_stashsv(classname, 0); |
888 | |
889 | SP -= items; |
890 | |
891 | XPUSHs(sv_2mortal(newSViv( |
892 | class_stash ? HvMROMETA(class_stash)->pkg_gen : 0 |
893 | ))); |
894 | |
895 | PUTBACK; |
896 | return; |
897 | } |
898 | |
f58cd386 |
899 | XS(XS_mro_nextcan) |
e1a479c5 |
900 | { |
901 | dVAR; |
902 | dXSARGS; |
f58cd386 |
903 | SV* self = ST(0); |
904 | const I32 throw_nomethod = SvIVX(ST(1)); |
bbd28cb9 |
905 | register I32 cxix = cxstack_ix; |
f58cd386 |
906 | register const PERL_CONTEXT *ccstack = cxstack; |
907 | const PERL_SI *top_si = PL_curstackinfo; |
908 | HV* selfstash; |
909 | SV *stashname; |
910 | const char *fq_subname; |
911 | const char *subname; |
912 | STRLEN stashname_len; |
913 | STRLEN subname_len; |
914 | SV* sv; |
915 | GV** gvp; |
916 | AV* linear_av; |
917 | SV** linear_svp; |
918 | const char *hvname; |
919 | I32 entries; |
920 | struct mro_meta* selfmeta; |
921 | HV* nmcache; |
bbd28cb9 |
922 | I32 i; |
e1a479c5 |
923 | |
48fc4736 |
924 | PERL_UNUSED_ARG(cv); |
925 | |
f58cd386 |
926 | SP -= items; |
927 | |
928 | if(sv_isobject(self)) |
929 | selfstash = SvSTASH(SvRV(self)); |
930 | else |
931 | selfstash = gv_stashsv(self, 0); |
932 | |
933 | assert(selfstash); |
934 | |
935 | hvname = HvNAME_get(selfstash); |
936 | if (!hvname) |
937 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
938 | |
f58cd386 |
939 | /* This block finds the contextually-enclosing fully-qualified subname, |
940 | much like looking at (caller($i))[3] until you find a real sub that |
bbd28cb9 |
941 | isn't ANON, etc (also skips over pureperl next::method, etc) */ |
942 | for(i = 0; i < 2; i++) { |
943 | cxix = __dopoptosub_at(ccstack, cxix); |
944 | for (;;) { |
945 | GV* cvgv; |
946 | STRLEN fq_subname_len; |
947 | |
948 | /* we may be in a higher stacklevel, so dig down deeper */ |
949 | while (cxix < 0) { |
950 | if(top_si->si_type == PERLSI_MAIN) |
951 | Perl_croak(aTHX_ "next::method/next::can/maybe::next::method must be used in method context"); |
952 | top_si = top_si->si_prev; |
953 | ccstack = top_si->si_cxstack; |
954 | cxix = __dopoptosub_at(ccstack, top_si->si_cxix); |
955 | } |
f58cd386 |
956 | |
bbd28cb9 |
957 | if(CxTYPE((PERL_CONTEXT*)(&ccstack[cxix])) != CXt_SUB |
958 | || (PL_DBsub && GvCV(PL_DBsub) && ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))) { |
959 | cxix = __dopoptosub_at(ccstack, cxix - 1); |
960 | continue; |
961 | } |
e1a479c5 |
962 | |
bbd28cb9 |
963 | { |
964 | const I32 dbcxix = __dopoptosub_at(ccstack, cxix - 1); |
965 | if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub)) { |
966 | if(CxTYPE((PERL_CONTEXT*)(&ccstack[dbcxix])) != CXt_SUB) { |
967 | cxix = dbcxix; |
968 | continue; |
969 | } |
f58cd386 |
970 | } |
971 | } |
f58cd386 |
972 | |
bbd28cb9 |
973 | cvgv = CvGV(ccstack[cxix].blk_sub.cv); |
f58cd386 |
974 | |
bbd28cb9 |
975 | if(!isGV(cvgv)) { |
976 | cxix = __dopoptosub_at(ccstack, cxix - 1); |
977 | continue; |
978 | } |
f58cd386 |
979 | |
bbd28cb9 |
980 | /* we found a real sub here */ |
981 | sv = sv_2mortal(newSV(0)); |
f58cd386 |
982 | |
bbd28cb9 |
983 | gv_efullname3(sv, cvgv, NULL); |
f58cd386 |
984 | |
bbd28cb9 |
985 | fq_subname = SvPVX(sv); |
986 | fq_subname_len = SvCUR(sv); |
f58cd386 |
987 | |
bbd28cb9 |
988 | subname = strrchr(fq_subname, ':'); |
989 | if(!subname) |
990 | Perl_croak(aTHX_ "next::method/next::can/maybe::next::method cannot find enclosing method"); |
f58cd386 |
991 | |
bbd28cb9 |
992 | subname++; |
993 | subname_len = fq_subname_len - (subname - fq_subname); |
994 | if(subname_len == 8 && strEQ(subname, "__ANON__")) { |
995 | cxix = __dopoptosub_at(ccstack, cxix - 1); |
996 | continue; |
997 | } |
998 | break; |
f58cd386 |
999 | } |
bbd28cb9 |
1000 | cxix--; |
e1a479c5 |
1001 | } |
f58cd386 |
1002 | |
1003 | /* If we made it to here, we found our context */ |
1004 | |
1005 | /* Initialize the next::method cache for this stash |
1006 | if necessary */ |
1007 | selfmeta = HvMROMETA(selfstash); |
1008 | if(!(nmcache = selfmeta->mro_nextmethod)) { |
1009 | nmcache = selfmeta->mro_nextmethod = newHV(); |
1010 | } |
1011 | else { /* Use the cached coderef if it exists */ |
1012 | HE* cache_entry = hv_fetch_ent(nmcache, sv, 0, 0); |
1013 | if (cache_entry) { |
1014 | SV* const val = HeVAL(cache_entry); |
1015 | if(val == &PL_sv_undef) { |
1016 | if(throw_nomethod) |
1017 | Perl_croak(aTHX_ "No next::method '%s' found for %s", subname, hvname); |
1018 | XSRETURN_EMPTY; |
1019 | } |
1020 | XPUSHs(sv_2mortal(newRV_inc(val))); |
1021 | XSRETURN(1); |
1022 | } |
e1a479c5 |
1023 | } |
1024 | |
f58cd386 |
1025 | /* beyond here is just for cache misses, so perf isn't as critical */ |
e1a479c5 |
1026 | |
f58cd386 |
1027 | stashname_len = subname - fq_subname - 2; |
1028 | stashname = sv_2mortal(newSVpvn(fq_subname, stashname_len)); |
e1a479c5 |
1029 | |
f58cd386 |
1030 | linear_av = mro_get_linear_isa_c3(selfstash, 0); /* has ourselves at the top of the list */ |
e1a479c5 |
1031 | |
f58cd386 |
1032 | linear_svp = AvARRAY(linear_av); |
1033 | entries = AvFILLp(linear_av) + 1; |
e1a479c5 |
1034 | |
f58cd386 |
1035 | /* Walk down our MRO, skipping everything up |
1036 | to the contextually enclosing class */ |
1037 | while (entries--) { |
1038 | SV * const linear_sv = *linear_svp++; |
1039 | assert(linear_sv); |
1040 | if(sv_eq(linear_sv, stashname)) |
1041 | break; |
1042 | } |
e1a479c5 |
1043 | |
f58cd386 |
1044 | /* Now search the remainder of the MRO for the |
1045 | same method name as the contextually enclosing |
1046 | method */ |
1047 | if(entries > 0) { |
1048 | while (entries--) { |
1049 | SV * const linear_sv = *linear_svp++; |
1050 | HV* curstash; |
1051 | GV* candidate; |
1052 | CV* cand_cv; |
e1a479c5 |
1053 | |
f58cd386 |
1054 | assert(linear_sv); |
1055 | curstash = gv_stashsv(linear_sv, FALSE); |
1056 | |
1057 | if (!curstash) { |
1058 | if (ckWARN(WARN_SYNTAX)) |
1059 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
1060 | (void*)linear_sv, hvname); |
1061 | continue; |
1062 | } |
1063 | |
1064 | assert(curstash); |
1065 | |
1066 | gvp = (GV**)hv_fetch(curstash, subname, subname_len, 0); |
1067 | if (!gvp) continue; |
1068 | |
1069 | candidate = *gvp; |
1070 | assert(candidate); |
1071 | |
1072 | if (SvTYPE(candidate) != SVt_PVGV) |
1073 | gv_init(candidate, curstash, subname, subname_len, TRUE); |
1074 | |
1075 | /* Notably, we only look for real entries, not method cache |
1076 | entries, because in C3 the method cache of a parent is not |
1077 | valid for the child */ |
1078 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
1079 | SvREFCNT_inc_simple_void_NN((SV*)cand_cv); |
1080 | hv_store_ent(nmcache, newSVsv(sv), (SV*)cand_cv, 0); |
1081 | XPUSHs(sv_2mortal(newRV_inc((SV*)cand_cv))); |
1082 | XSRETURN(1); |
1083 | } |
1084 | } |
e1a479c5 |
1085 | } |
1086 | |
f58cd386 |
1087 | hv_store_ent(nmcache, newSVsv(sv), &PL_sv_undef, 0); |
1088 | if(throw_nomethod) |
1089 | Perl_croak(aTHX_ "No next::method '%s' found for %s", subname, hvname); |
1090 | XSRETURN_EMPTY; |
e1a479c5 |
1091 | } |
1092 | |
1093 | /* |
1094 | * Local variables: |
1095 | * c-indentation-style: bsd |
1096 | * c-basic-offset: 4 |
1097 | * indent-tabs-mode: t |
1098 | * End: |
1099 | * |
1100 | * ex: set ts=8 sts=4 sw=4 noet: |
1101 | */ |