close over the coercion sub separately
[gitmo/Moose.git] / mop.c
CommitLineData
38bf2a25 1#include "mop.h"
2
3void
4mop_call_xs (pTHX_ XSPROTO(subaddr), CV *cv, SV **mark)
5{
6 dSP;
7 PUSHMARK(mark);
8 (*subaddr)(aTHX_ cv);
9 PUTBACK;
10}
11
12#if PERL_VERSION >= 10
13UV
14mop_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
49UV
50mop_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
59SV *
60mop_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
78int
79mop_get_code_info (SV *coderef, char **pkg, char **name)
80{
81 if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) {
82 return 0;
83 }
84
85 coderef = SvRV(coderef);
86
87 /* sub is still being compiled */
88 if (!CvGV(coderef)) {
89 return 0;
90 }
91
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 */
96
97 if ( isGV_with_GP(CvGV(coderef)) ) {
98 GV *gv = CvGV(coderef);
99 *pkg = HvNAME( GvSTASH(gv) ? GvSTASH(gv) : CvSTASH(coderef) );
100 *name = GvNAME( CvGV(coderef) );
101 } else {
102 *pkg = "__UNKNOWN__";
103 *name = "__ANON__";
104 }
105
106 return 1;
107}
108
109/* XXX: eventually this should just use the implementation in Package::Stash */
110void
111mop_get_package_symbols (HV *stash, type_filter_t filter, get_package_symbols_cb_t cb, void *ud)
112{
113 HE *he;
114
115 (void)hv_iterinit(stash);
116
117 if (filter == TYPE_FILTER_NONE) {
118 while ( (he = hv_iternext(stash)) ) {
119 STRLEN keylen;
120 const char *key = HePV(he, keylen);
121 if (!cb(key, keylen, HeVAL(he), ud)) {
122 return;
123 }
124 }
125 return;
126 }
127
128 while ( (he = hv_iternext(stash)) ) {
129 GV * const gv = (GV*)HeVAL(he);
130 STRLEN keylen;
131 const char * const key = HePV(he, keylen);
132 SV *sv = NULL;
133
134 if(isGV(gv)){
135 switch (filter) {
136 case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break;
137 case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break;
138 case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break;
139 case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break;
140 case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break;
141 default:
142 croak("Unknown type");
143 }
144 }
145 /* expand the gv into a real typeglob if it
146 * contains stub functions or constants and we
147 * were asked to return CODE references */
148 else if (filter == TYPE_FILTER_CODE) {
149 gv_init(gv, stash, key, keylen, GV_ADDMULTI);
150 sv = (SV *)GvCV(gv);
151 }
152
153 if (sv) {
154 if (!cb(key, keylen, sv, ud)) {
155 return;
156 }
157 }
158 }
159}
160
161static bool
162collect_all_symbols (const char *key, STRLEN keylen, SV *val, void *ud)
163{
164 HV *hash = (HV *)ud;
165
166 if (!hv_store (hash, key, keylen, newRV_inc(val), 0)) {
167 croak("failed to store symbol ref");
168 }
169
170 return TRUE;
171}
172
173HV *
174mop_get_all_package_symbols (HV *stash, type_filter_t filter)
175{
176 HV *ret = newHV ();
177 mop_get_package_symbols (stash, filter, collect_all_symbols, ret);
178 return ret;
179}
180
181#define DECLARE_KEY(name) { #name, #name, NULL, 0 }
182#define DECLARE_KEY_WITH_VALUE(name, value) { #name, value, NULL, 0 }
183
184/* the order of these has to match with those in mop.h */
185static struct {
186 const char *name;
187 const char *value;
188 SV *key;
189 U32 hash;
190} prehashed_keys[key_last] = {
191 DECLARE_KEY(_expected_method_class),
192 DECLARE_KEY(ISA),
193 DECLARE_KEY(VERSION),
194 DECLARE_KEY(accessor),
195 DECLARE_KEY(associated_class),
196 DECLARE_KEY(associated_metaclass),
197 DECLARE_KEY(associated_methods),
198 DECLARE_KEY(attribute_metaclass),
199 DECLARE_KEY(attributes),
200 DECLARE_KEY(body),
201 DECLARE_KEY(builder),
202 DECLARE_KEY(clearer),
203 DECLARE_KEY(constructor_class),
204 DECLARE_KEY(constructor_name),
205 DECLARE_KEY(definition_context),
206 DECLARE_KEY(destructor_class),
207 DECLARE_KEY(immutable_trait),
208 DECLARE_KEY(init_arg),
209 DECLARE_KEY(initializer),
210 DECLARE_KEY(insertion_order),
211 DECLARE_KEY(instance_metaclass),
212 DECLARE_KEY(is_inline),
213 DECLARE_KEY(method_metaclass),
214 DECLARE_KEY(methods),
215 DECLARE_KEY(name),
216 DECLARE_KEY(package),
217 DECLARE_KEY(package_name),
218 DECLARE_KEY(predicate),
219 DECLARE_KEY(reader),
220 DECLARE_KEY(wrapped_method_metaclass),
221 DECLARE_KEY(writer),
222 DECLARE_KEY_WITH_VALUE(package_cache_flag, "_package_cache_flag"),
223 DECLARE_KEY_WITH_VALUE(_version, "-version")
224};
225
226SV *
227mop_prehashed_key_for (mop_prehashed_key_t key)
228{
229 return prehashed_keys[key].key;
230}
231
232U32
233mop_prehashed_hash_for (mop_prehashed_key_t key)
234{
235 return prehashed_keys[key].hash;
236}
237
238void
239mop_prehash_keys ()
240{
241 int i;
242 for (i = 0; i < key_last; i++) {
243 const char *value = prehashed_keys[i].value;
244 prehashed_keys[i].key = newSVpv(value, strlen(value));
245 PERL_HASH(prehashed_keys[i].hash, value, strlen(value));
246 }
247}
248
249XS(mop_xs_simple_reader)
250{
251#ifdef dVAR
252 dVAR; dXSARGS;
253#else
254 dXSARGS;
255#endif
256 register HE *he;
257 mop_prehashed_key_t key = (mop_prehashed_key_t)CvXSUBANY(cv).any_i32;
258 SV *self;
259
260 if (items != 1) {
261 croak("expected exactly one argument");
262 }
263
264 self = ST(0);
265
266 if (!SvROK(self)) {
267 croak("can't call %s as a class method", prehashed_keys[key].name);
268 }
269
270 if (SvTYPE(SvRV(self)) != SVt_PVHV) {
271 croak("object is not a hashref");
272 }
273
274 if ((he = hv_fetch_ent((HV *)SvRV(self), prehashed_keys[key].key, 0, prehashed_keys[key].hash))) {
275 ST(0) = HeVAL(he);
276 }
277 else {
278 ST(0) = &PL_sv_undef;
279 }
280
281 XSRETURN(1);
282}
283