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1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
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4 | |
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5 | #define NEED_sv_2pv_flags |
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6 | #define NEED_sv_2pv_nolen |
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7 | #include "ppport.h" |
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8 | |
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9 | SV *key_name; |
10 | U32 hash_name; |
11 | |
12 | SV *key_package; |
13 | U32 hash_package; |
14 | |
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15 | SV *key_package_name; |
16 | U32 hash_package_name; |
17 | |
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18 | SV *key_body; |
19 | U32 hash_body; |
20 | |
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21 | SV* method_metaclass; |
22 | SV* associated_metaclass; |
23 | SV* wrap; |
24 | |
25 | |
26 | #define check_package_cache_flag(stash) mop_check_package_cache_flag(aTHX_ stash) |
27 | #ifdef HvMROMETA /* 5.10.0 */ |
28 | |
29 | #ifndef mro_meta_init |
30 | #define mro_meta_init(stash) Perl_mro_meta_init(aTHX_ stash) /* used in HvMROMETA macro */ |
31 | #endif /* !mro_meta_init */ |
32 | |
33 | static UV |
34 | mop_check_package_cache_flag(pTHX_ HV* stash) { |
35 | assert(SvTYPE(stash) == SVt_PVHV); |
36 | |
37 | return HvMROMETA(stash)->pkg_gen; /* mro::get_pkg_gen($pkg) */ |
38 | } |
39 | |
40 | #else /* pre 5.10.0 */ |
41 | |
42 | static UV |
43 | mop_check_package_cache_flag(pTHX_ HV* stash) { |
44 | PERL_UNUSED_ARG(stash); |
45 | assert(SvTYPE(stash) == SVt_PVHV); |
46 | |
47 | return PL_sub_generation; |
48 | } |
49 | #endif |
50 | |
51 | #define call0(s, m) mop_call0(aTHX_ s, m) |
52 | static SV* |
53 | mop_call0(pTHX_ SV* const self, SV* const method) { |
54 | dSP; |
55 | SV* ret; |
56 | |
57 | PUSHMARK(SP); |
58 | XPUSHs(self); |
59 | PUTBACK; |
60 | |
61 | call_sv(method, G_SCALAR | G_METHOD); |
62 | |
63 | SPAGAIN; |
64 | ret = POPs; |
65 | PUTBACK; |
66 | |
67 | return ret; |
68 | } |
69 | |
70 | static void |
71 | mop_update_method_map(pTHX_ SV* const self, SV* const class_name, HV* const stash, HV* const map) { |
72 | const char* const class_name_pv = HvNAME(stash); /* must be HvNAME(stash), not SvPV_nolen_const(class_name) */ |
73 | SV* method_metaclass_name; |
74 | char* method_name; |
75 | I32 method_name_len; |
76 | GV* gv; |
77 | dSP; |
78 | |
79 | hv_iterinit(stash); |
80 | while((gv = (GV*)hv_iternextsv(stash, &method_name, &method_name_len))) { |
81 | CV* cv; |
82 | if ( SvROK(gv) ) { |
83 | /* rafl says that this wastes memory savings that GvSVs have |
84 | in 5.8.9 and 5.10.x. But without it some tests fail. rafl |
85 | says the right thing to do is to handle GvSVs differently |
86 | here. */ |
87 | gv_init((GV*)gv, stash, method_name, method_name_len, GV_ADDMULTI); |
88 | } |
89 | |
90 | if ( SvTYPE(gv) == SVt_PVGV && (cv = GvCVu(gv)) ) { |
91 | GV* const cvgv = CvGV(cv); |
92 | /* ($cvpkg_name, $cv_name) = get_code_info($cv) */ |
93 | const char* const cvpkg_name = HvNAME(GvSTASH(cvgv)); |
94 | const char* const cv_name = GvNAME(cvgv); |
95 | SV* method_slot; |
96 | SV* method_object; |
97 | |
98 | /* this checks to see that the subroutine is actually from our package */ |
99 | if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) { |
100 | if ( strNE(cvpkg_name, class_name_pv) ) { |
101 | continue; |
102 | } |
103 | } |
104 | |
105 | method_slot = *hv_fetch(map, method_name, method_name_len, TRUE); |
106 | if ( SvOK(method_slot) ) { |
107 | SV* const body = call0(method_slot, key_body); /* $method_object->body() */ |
108 | if ( SvROK(body) && ((CV*) SvRV(body)) == cv ) { |
109 | continue; |
110 | } |
111 | } |
112 | |
113 | method_metaclass_name = call0(self, method_metaclass); /* $self->method_metaclass() */ |
114 | |
115 | /* |
116 | $method_object = $method_metaclass->wrap( |
117 | $cv, |
118 | associated_metaclass => $self, |
119 | package_name => $class_name, |
120 | name => $method_name |
121 | ); |
122 | */ |
123 | ENTER; |
124 | SAVETMPS; |
125 | |
126 | PUSHMARK(SP); |
127 | EXTEND(SP, 8); |
128 | PUSHs(method_metaclass_name); /* invocant */ |
129 | mPUSHs(newRV_inc((SV*)cv)); |
130 | PUSHs(associated_metaclass); |
131 | PUSHs(self); |
132 | PUSHs(key_package_name); |
133 | PUSHs(class_name); |
134 | PUSHs(key_name); |
135 | mPUSHs(newSVpv(method_name, method_name_len)); |
136 | PUTBACK; |
137 | |
138 | call_sv(wrap, G_SCALAR | G_METHOD); |
139 | SPAGAIN; |
140 | method_object = POPs; |
141 | PUTBACK; |
142 | /* $map->{$method_name} = $method_object */ |
143 | sv_setsv(method_slot, method_object); |
144 | |
145 | FREETMPS; |
146 | LEAVE; |
147 | } |
148 | } |
149 | } |
150 | |
151 | |
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152 | /* |
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153 | get_code_info: |
154 | Pass in a coderef, returns: |
155 | [ $pkg_name, $coderef_name ] ie: |
156 | [ 'Foo::Bar', 'new' ] |
157 | */ |
158 | |
159 | MODULE = Class::MOP PACKAGE = Class::MOP |
160 | |
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161 | BOOT: |
162 | key_name = newSVpvs("name"); |
163 | key_body = newSVpvs("body"); |
164 | key_package = newSVpvs("package"); |
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165 | key_package_name = newSVpvs("package_name"); |
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166 | |
167 | PERL_HASH(hash_name, "name", 4); |
168 | PERL_HASH(hash_body, "body", 4); |
169 | PERL_HASH(hash_package, "package", 7); |
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170 | PERL_HASH(hash_package_name, "package_name", 12); |
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171 | |
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172 | method_metaclass = newSVpvs("method_metaclass"); |
173 | wrap = newSVpvs("wrap"); |
174 | associated_metaclass = newSVpvs("associated_metaclass"); |
175 | |
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176 | |
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177 | PROTOTYPES: ENABLE |
178 | |
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179 | |
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180 | void |
181 | get_code_info(coderef) |
182 | SV* coderef |
183 | PREINIT: |
184 | char* name; |
185 | char* pkg; |
186 | PPCODE: |
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187 | if( SvOK(coderef) && SvROK(coderef) && SvTYPE(SvRV(coderef)) == SVt_PVCV) { |
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188 | coderef = SvRV(coderef); |
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189 | /* I think this only gets triggered with a mangled coderef, but if |
190 | we hit it without the guard, we segfault. The slightly odd return |
191 | value strikes me as an improvement (mst) |
192 | */ |
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193 | #ifdef isGV_with_GP |
194 | if ( isGV_with_GP(CvGV(coderef))) { |
195 | #endif |
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196 | pkg = HvNAME( GvSTASH(CvGV(coderef)) ); |
197 | name = GvNAME( CvGV(coderef) ); |
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198 | #ifdef isGV_with_GP |
199 | } else { |
200 | pkg = "__UNKNOWN__"; |
201 | name = "__ANON__"; |
202 | } |
203 | #endif |
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204 | |
205 | EXTEND(SP, 2); |
206 | PUSHs(newSVpvn(pkg, strlen(pkg))); |
207 | PUSHs(newSVpvn(name, strlen(name))); |
208 | } |
209 | |
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210 | |
211 | MODULE = Class::MOP PACKAGE = Class::MOP::Package |
212 | |
213 | void |
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214 | get_all_package_symbols(self, ...) |
215 | SV *self |
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216 | PROTOTYPE: $;$ |
217 | PREINIT: |
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218 | HV *stash = NULL; |
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219 | SV *type_filter = NULL; |
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220 | register HE *he; |
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221 | PPCODE: |
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222 | if (! SvROK(self)) { |
223 | die("Cannot call get_all_package_symbols as a class method"); |
224 | } |
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225 | |
226 | switch ( GIMME_V ) { |
227 | case G_VOID: return; break; |
228 | case G_SCALAR: ST(0) = &PL_sv_undef; return; break; |
229 | } |
230 | |
231 | if ( items > 1 ) type_filter = ST(1); |
232 | |
233 | PUTBACK; |
234 | |
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235 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package))) |
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236 | stash = gv_stashsv(HeVAL(he),0); |
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237 | |
238 | if ( stash ) { |
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239 | |
240 | (void)hv_iterinit(stash); |
241 | |
242 | if ( type_filter && SvPOK(type_filter) ) { |
243 | const char *const type = SvPV_nolen(type_filter); |
244 | |
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245 | while ((he = hv_iternext(stash))) { |
246 | SV *const gv = HeVAL(he); |
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247 | SV *sv; |
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248 | char *key; |
249 | STRLEN keylen; |
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250 | char *package; |
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251 | SV *fq; |
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252 | |
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253 | switch( SvTYPE(gv) ) { |
254 | case SVt_PVGV: |
255 | switch (*type) { |
256 | case 'C': sv = (SV *)GvCVu(gv); break; /* CODE */ |
257 | case 'A': sv = (SV *)GvAV(gv); break; /* ARRAY */ |
258 | case 'I': sv = (SV *)GvIO(gv); break; /* IO */ |
259 | case 'H': sv = (SV *)GvHV(gv); break; /* HASH */ |
260 | case 'S': sv = (SV *)GvSV(gv); break; /* SCALAR */ |
261 | default: |
262 | croak("Unknown type %s\n", type); |
263 | } |
264 | break; |
265 | case SVt_RV: |
266 | /* BAH! constants are horrible */ |
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267 | |
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268 | if (!SvROK (gv)) { |
269 | continue; |
270 | } |
271 | |
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272 | /* we don't really care about the length, |
273 | but that's the API */ |
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274 | key = HePV(he, keylen); |
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275 | package = HvNAME(stash); |
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276 | fq = newSVpvf("%s::%s", package, key); |
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277 | sv = (SV*)get_cv(SvPV_nolen(fq), 0); |
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278 | break; |
279 | default: |
280 | continue; |
281 | } |
282 | |
283 | if ( sv ) { |
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284 | SV *key = hv_iterkeysv(he); |
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285 | SPAGAIN; |
286 | EXTEND(SP, 2); |
287 | PUSHs(key); |
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288 | PUSHs(sv_2mortal(newRV_inc(sv))); |
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289 | PUTBACK; |
290 | } |
291 | } |
292 | } else { |
293 | EXTEND(SP, HvKEYS(stash) * 2); |
294 | |
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295 | while ((he = hv_iternext(stash))) { |
296 | SV *key = hv_iterkeysv(he); |
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297 | SV *sv = HeVAL(he); |
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298 | SPAGAIN; |
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299 | PUSHs(key); |
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300 | PUSHs(sv); |
301 | PUTBACK; |
302 | } |
303 | } |
304 | |
305 | } |
306 | |
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307 | void |
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308 | name(self) |
309 | SV *self |
310 | PREINIT: |
311 | register HE *he; |
312 | PPCODE: |
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313 | if (! SvROK(self)) { |
314 | die("Cannot call name as a class method"); |
315 | } |
316 | |
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317 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package))) |
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318 | XPUSHs(HeVAL(he)); |
319 | else |
320 | ST(0) = &PL_sv_undef; |
321 | |
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322 | MODULE = Class::MOP PACKAGE = Class::MOP::Attribute |
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323 | |
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324 | void |
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325 | name(self) |
326 | SV *self |
327 | PREINIT: |
328 | register HE *he; |
329 | PPCODE: |
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330 | if (! SvROK(self)) { |
331 | die("Cannot call name as a class method"); |
332 | } |
333 | |
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334 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name))) |
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335 | XPUSHs(HeVAL(he)); |
336 | else |
337 | ST(0) = &PL_sv_undef; |
338 | |
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339 | MODULE = Class::MOP PACKAGE = Class::MOP::Method |
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340 | |
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341 | void |
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342 | name(self) |
343 | SV *self |
344 | PREINIT: |
345 | register HE *he; |
346 | PPCODE: |
347 | if (! SvROK(self)) { |
348 | die("Cannot call name as a class method"); |
349 | } |
350 | |
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351 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name))) |
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352 | XPUSHs(HeVAL(he)); |
353 | else |
354 | ST(0) = &PL_sv_undef; |
355 | |
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356 | void |
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357 | package_name(self) |
358 | SV *self |
359 | PREINIT: |
360 | register HE *he; |
361 | PPCODE: |
362 | if (! SvROK(self)) { |
363 | die("Cannot call package_name as a class method"); |
364 | } |
365 | |
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366 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_package_name, 0, hash_package_name))) |
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367 | XPUSHs(HeVAL(he)); |
368 | else |
369 | ST(0) = &PL_sv_undef; |
370 | |
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371 | void |
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372 | body(self) |
373 | SV *self |
374 | PREINIT: |
375 | register HE *he; |
376 | PPCODE: |
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377 | if (! SvROK(self)) { |
378 | die("Cannot call body as a class method"); |
379 | } |
380 | |
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381 | if ((he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body))) |
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382 | XPUSHs(HeVAL(he)); |
383 | else |
384 | ST(0) = &PL_sv_undef; |
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385 | |
386 | |
387 | MODULE = Class::MOP PACKAGE = Class::MOP::Class |
388 | |
389 | void |
390 | get_method_map(self) |
391 | SV* self |
392 | INIT: |
393 | if ( !SvRV(self) ) { |
394 | die("Cannot call get_method_map as a class method"); |
395 | } |
396 | CODE: |
397 | HE* const he = hv_fetch_ent((HV*)SvRV(self), key_package, TRUE, hash_package); /* $self->name() */ |
398 | SV* const class_name = HeVAL(he); |
399 | HV* const stash = gv_stashsv(class_name, TRUE); |
400 | UV const current = check_package_cache_flag(stash); |
401 | SV* const cache_flag = *hv_fetchs((HV*)SvRV(self), "_package_cache_flag", TRUE); |
402 | SV* const map_ref = *hv_fetchs((HV*)SvRV(self), "methods", TRUE); |
403 | |
404 | /* in $self->{methods} does not yet exist (or got deleted) */ |
405 | if ( ! (SvROK(map_ref) && SvTYPE(SvRV(map_ref)) == SVt_PVHV) ) { |
406 | SV* new_map_ref = newRV_noinc((SV*)newHV()); |
407 | sv_2mortal(new_map_ref); |
408 | sv_setsv(map_ref, new_map_ref); |
409 | } |
410 | |
411 | if ( ! (SvOK(cache_flag) && SvUV(cache_flag) == current) ) { |
412 | ENTER; |
413 | SAVETMPS; |
414 | |
415 | mop_update_method_map(aTHX_ self, class_name, stash, (HV*)SvRV(map_ref)); |
416 | sv_setuv(cache_flag, check_package_cache_flag(stash)); /* update_cache_flag() */ |
417 | |
418 | FREETMPS; |
419 | LEAVE; |
420 | } |
421 | ST(0) = map_ref; /* map_ref is already mortal */ |