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1 | #include "mop.h" |
2 | |
3 | void |
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4 | mop_call_xs (pTHX_ XSPROTO(subaddr), CV *cv, SV **mark) |
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5 | { |
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6 | dSP; |
7 | PUSHMARK(mark); |
8 | (*subaddr)(aTHX_ cv); |
9 | PUTBACK; |
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10 | } |
11 | |
12 | #if PERL_VERSION >= 10 |
13 | UV |
14 | mop_check_package_cache_flag (pTHX_ HV *stash) |
15 | { |
16 | assert(SvTYPE(stash) == SVt_PVHV); |
17 | |
18 | /* here we're trying to implement a c version of mro::get_pkg_gen($stash), |
19 | * however the perl core doesn't make it easy for us. It doesn't provide an |
20 | * api that just does what we want. |
21 | * |
22 | * However, we know that the information we want is, inside the core, |
23 | * available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the |
24 | * HvMROMETA macro is public, it is implemented using Perl_mro_meta_init, |
25 | * which is not public and only available inside the core, as the mro |
26 | * interface as well as the structure returned by mro_meta_init isn't |
27 | * considered to be stable yet. |
28 | * |
29 | * Perl_mro_meta_init isn't declared static, so we could just define it |
30 | * ourselfs if perls headers don't do that for us, except that won't work |
31 | * on platforms where symbols need to be explicitly exported when linking |
32 | * shared libraries. |
33 | * |
34 | * So our, hopefully temporary, solution is to be even more evil and |
35 | * basically reimplement HvMROMETA in a very fragile way that'll blow up |
36 | * when the relevant parts of the mro implementation in core change. |
37 | * |
38 | * :-( |
39 | * |
40 | */ |
41 | |
42 | return HvAUX(stash)->xhv_mro_meta |
43 | ? HvAUX(stash)->xhv_mro_meta->pkg_gen |
44 | : 0; |
45 | } |
46 | |
47 | #else /* pre 5.10.0 */ |
48 | |
49 | UV |
50 | mop_check_package_cache_flag (pTHX_ HV *stash) |
51 | { |
52 | PERL_UNUSED_ARG(stash); |
53 | assert(SvTYPE(stash) == SVt_PVHV); |
54 | |
55 | return PL_sub_generation; |
56 | } |
57 | #endif |
58 | |
59 | SV * |
60 | mop_call0 (pTHX_ SV *const self, SV *const method) |
61 | { |
62 | dSP; |
63 | SV *ret; |
64 | |
65 | PUSHMARK(SP); |
66 | XPUSHs(self); |
67 | PUTBACK; |
68 | |
69 | call_sv(method, G_SCALAR | G_METHOD); |
70 | |
71 | SPAGAIN; |
72 | ret = POPs; |
73 | PUTBACK; |
74 | |
75 | return ret; |
76 | } |
77 | |
78 | int |
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79 | mop_get_code_info (SV *coderef, char **pkg, char **name) |
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80 | { |
81 | if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) { |
82 | return 0; |
83 | } |
84 | |
85 | coderef = SvRV(coderef); |
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86 | |
87 | /* sub is still being compiled */ |
88 | if (!CvGV(coderef)) { |
89 | return 0; |
90 | } |
91 | |
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92 | /* I think this only gets triggered with a mangled coderef, but if |
93 | we hit it without the guard, we segfault. The slightly odd return |
94 | value strikes me as an improvement (mst) |
95 | */ |
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96 | |
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97 | if ( isGV_with_GP(CvGV(coderef)) ) { |
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98 | GV *gv = CvGV(coderef); |
99 | *pkg = HvNAME( GvSTASH(gv) ? GvSTASH(gv) : CvSTASH(coderef) ); |
100 | *name = GvNAME( CvGV(coderef) ); |
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101 | } else { |
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102 | *pkg = "__UNKNOWN__"; |
103 | *name = "__ANON__"; |
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104 | } |
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105 | |
106 | return 1; |
107 | } |
108 | |
109 | void |
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110 | mop_get_package_symbols (HV *stash, type_filter_t filter, get_package_symbols_cb_t cb, void *ud) |
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111 | { |
112 | HE *he; |
113 | |
114 | (void)hv_iterinit(stash); |
115 | |
116 | if (filter == TYPE_FILTER_NONE) { |
117 | while ( (he = hv_iternext(stash)) ) { |
118 | STRLEN keylen; |
119 | const char *key = HePV(he, keylen); |
120 | if (!cb(key, keylen, HeVAL(he), ud)) { |
121 | return; |
122 | } |
123 | } |
124 | return; |
125 | } |
126 | |
127 | while ( (he = hv_iternext(stash)) ) { |
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128 | GV * const gv = (GV*)HeVAL(he); |
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129 | STRLEN keylen; |
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130 | const char * const key = HePV(he, keylen); |
131 | SV *sv = NULL; |
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132 | |
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133 | if(isGV(gv)){ |
134 | switch (filter) { |
135 | case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break; |
136 | case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break; |
137 | case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break; |
138 | case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break; |
139 | case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break; |
140 | default: |
141 | croak("Unknown type"); |
142 | } |
143 | } |
144 | /* expand the gv into a real typeglob if it |
145 | * contains stub functions or constants and we |
146 | * were asked to return CODE references */ |
147 | else if (filter == TYPE_FILTER_CODE) { |
148 | gv_init(gv, stash, key, keylen, GV_ADDMULTI); |
149 | sv = (SV *)GvCV(gv); |
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150 | } |
151 | |
152 | if (sv) { |
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153 | if (!cb(key, keylen, sv, ud)) { |
154 | return; |
155 | } |
156 | } |
157 | } |
158 | } |
159 | |
160 | static bool |
161 | collect_all_symbols (const char *key, STRLEN keylen, SV *val, void *ud) |
162 | { |
163 | HV *hash = (HV *)ud; |
164 | |
165 | if (!hv_store (hash, key, keylen, newRV_inc(val), 0)) { |
166 | croak("failed to store symbol ref"); |
167 | } |
168 | |
169 | return TRUE; |
170 | } |
171 | |
172 | HV * |
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173 | mop_get_all_package_symbols (HV *stash, type_filter_t filter) |
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174 | { |
175 | HV *ret = newHV (); |
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176 | mop_get_package_symbols (stash, filter, collect_all_symbols, ret); |
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177 | return ret; |
178 | } |
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179 | |
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180 | #define DECLARE_KEY(name) { #name, #name, NULL, 0 } |
181 | #define DECLARE_KEY_WITH_VALUE(name, value) { #name, value, NULL, 0 } |
182 | |
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183 | /* the order of these has to match with those in mop.h */ |
184 | static struct { |
185 | const char *name; |
186 | const char *value; |
187 | SV *key; |
188 | U32 hash; |
189 | } prehashed_keys[key_last] = { |
190 | DECLARE_KEY(name), |
191 | DECLARE_KEY(package), |
192 | DECLARE_KEY(package_name), |
193 | DECLARE_KEY(body), |
194 | DECLARE_KEY_WITH_VALUE(package_cache_flag, "_package_cache_flag"), |
195 | DECLARE_KEY(methods), |
196 | DECLARE_KEY(VERSION), |
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197 | DECLARE_KEY(ISA), |
198 | DECLARE_KEY_WITH_VALUE(_version, "-version") |
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199 | }; |
200 | |
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201 | SV * |
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202 | mop_prehashed_key_for (mop_prehashed_key_t key) |
203 | { |
204 | return prehashed_keys[key].key; |
205 | } |
206 | |
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207 | U32 |
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208 | mop_prehashed_hash_for (mop_prehashed_key_t key) |
209 | { |
210 | return prehashed_keys[key].hash; |
211 | } |
212 | |
213 | void |
214 | mop_prehash_keys () |
215 | { |
216 | int i; |
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217 | for (i = 0; i < key_last; i++) { |
218 | const char *value = prehashed_keys[i].value; |
219 | prehashed_keys[i].key = newSVpv(value, strlen(value)); |
220 | PERL_HASH(prehashed_keys[i].hash, value, strlen(value)); |
221 | } |
222 | } |
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223 | |
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224 | XS(mop_xs_simple_reader) |
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225 | { |
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226 | #ifdef dVAR |
227 | dVAR; dXSARGS; |
228 | #else |
229 | dXSARGS; |
230 | #endif |
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231 | register HE *he; |
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232 | mop_prehashed_key_t key = (mop_prehashed_key_t)CvXSUBANY(cv).any_i32; |
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233 | SV *self; |
234 | |
235 | if (items != 1) { |
236 | croak("expected exactly one argument"); |
237 | } |
238 | |
239 | self = ST(0); |
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240 | |
241 | if (!SvROK(self)) { |
242 | croak("can't call %s as a class method", prehashed_keys[key].name); |
243 | } |
244 | |
245 | if (SvTYPE(SvRV(self)) != SVt_PVHV) { |
246 | croak("object is not a hashref"); |
247 | } |
248 | |
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249 | if ((he = hv_fetch_ent((HV *)SvRV(self), prehashed_keys[key].key, 0, prehashed_keys[key].hash))) { |
250 | ST(0) = HeVAL(he); |
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251 | } |
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252 | else { |
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253 | ST(0) = &PL_sv_undef; |
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254 | } |
255 | |
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256 | XSRETURN(1); |
257 | } |
258 | |