1 /* This file is part of the Sub::Op Perl module.
2 * See http://search.cpan.org/dist/Sub-Op/ */
4 #define PERL_NO_GET_CONTEXT
9 #define __PACKAGE__ "Sub::Op"
10 #define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
12 /* --- Compatibility wrappers ---------------------------------------------- */
14 #define SO_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
17 # define GvCV_set(G, C) (GvCV(G) = (C))
20 /* ... Thread safety and multiplicity ...................................... */
22 #ifndef SO_MULTIPLICITY
23 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
24 # define SO_MULTIPLICITY 1
26 # define SO_MULTIPLICITY 0
29 #if SO_MULTIPLICITY && !defined(tTHX)
30 # define tTHX PerlInterpreter*
33 #if SO_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))
34 # define SO_THREADSAFE 1
36 # define MY_CXT_CLONE \
38 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
39 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
40 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
43 # define SO_THREADSAFE 0
45 # define dMY_CXT dNOOP
47 # define MY_CXT indirect_globaldata
49 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
51 # define MY_CXT_INIT NOOP
53 # define MY_CXT_CLONE NOOP
56 /* --- Global data --------------------------------------------------------- */
58 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
65 #endif /* SO_THREADSAFE */
72 STATIC SV *so_clone(pTHX_ SV *sv, tTHX owner) {
73 #define so_clone(S, O) so_clone(aTHX_ (S), (O))
78 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
81 param.stashes = stashes;
83 param.proto_perl = owner;
85 dupsv = sv_dup(sv, ¶m);
89 SvREFCNT_dec(stashes);
92 return SvREFCNT_inc(dupsv);
95 #endif /* SO_THREADSAFE */
97 /* --- Public API ---------------------------------------------------------- */
101 void sub_op_init(sub_op_config_t *c) {
113 void sub_op_register(pTHX_ const sub_op_config_t *c, U32 flags) {
116 if (!(flags & SUB_OP_REGISTER_STEAL))
117 c = sub_op_dup(aTHX_ c);
119 (void) hv_store(MY_CXT.map, c->name, c->namelen, newSViv(PTR2IV(c)), 0);
122 STATIC const char *so_strndup(pTHX_ const char *s, STRLEN len) {
123 #define so_strndup(S, L) so_strndup(aTHX_ (S), (L))
129 d = PerlMemShared_malloc(len + 1);
130 Copy(s, d, len, char);
131 ((char *) d)[len] = '\0';
136 sub_op_config_t *sub_op_dup(pTHX_ const sub_op_config_t *orig) {
137 sub_op_config_t *dupe = PerlMemShared_malloc(sizeof *dupe);
139 dupe->name = so_strndup(orig->name, orig->namelen);
140 dupe->namelen = orig->namelen;
142 dupe->proto = so_strndup(orig->proto, orig->protolen);
143 dupe->protolen = orig->protolen;
145 dupe->call = orig->call;
146 dupe->ref = orig->ref;
152 void sub_op_free(pTHX_ sub_op_config_t *c) {
153 PerlMemShared_free((char *) c->name);
154 PerlMemShared_free(c);
159 OP *sub_op_study(const OP *o, OP **last_arg_p, OP **rv2cv_p) {
160 OP *ex_list, *last_arg, *rv2cv, *gvop;
162 ex_list = cUNOPo->op_first;
163 /* pushmark when a method call */
164 if (!ex_list || ex_list->op_type != OP_NULL)
167 rv2cv = cUNOPx(ex_list)->op_first;
172 OP *next = rv2cv->op_sibling;
179 if (!(rv2cv->op_flags & OPf_KIDS))
182 gvop = cUNOPx(rv2cv)->op_first;
184 if (gvop && gvop->op_type == OP_GV)
194 *last_arg_p = last_arg;
201 /* --- Private helpers ----------------------------------------------------- */
203 STATIC IV so_hint(pTHX) {
204 #define so_hint() so_hint(aTHX)
207 #if SO_HAS_PERL(5, 9, 5)
208 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
210 __PACKAGE__, __PACKAGE_LEN__,
215 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
222 return (SvOK(hint) && SvIOK(hint)) ? SvIVX(hint) : 0;
225 STATIC OP *so_find_gvop(const OP *o) {
226 OP *ex_list, *last_arg, *rv2cv, *gvop;
228 ex_list = cUNOPo->op_first;
229 /* pushmark when a method call */
230 if (!ex_list || ex_list->op_type != OP_NULL)
233 rv2cv = cUNOPx(ex_list)->op_first;
238 OP *next = rv2cv->op_sibling;
244 if (!(rv2cv->op_flags & OPf_KIDS))
247 gvop = cUNOPx(rv2cv)->op_first;
248 if (gvop && gvop->op_type == OP_GV)
255 STATIC OP *(*so_old_ck_entersub)(pTHX_ OP *) = 0;
257 STATIC OP *so_ck_entersub(pTHX_ OP *o) {
258 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
264 if (o->op_type != OP_ENTERSUB)
266 if (o->op_private & OPpENTERSUB_AMPER) /* hopefully \&foo */
269 gvop = so_find_gvop(o);
273 gv = cGVOPx_gv(gvop);
278 const char *name = GvNAME(gv);
279 I32 len = GvNAMELEN(gv);
280 const sub_op_config_t *c;
283 svp = hv_fetch(MY_CXT.map, name, len, 0);
287 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
289 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
295 o = CALL_FPTR(c->call)(aTHX_ o, c->ud);
303 STATIC OP *(*so_old_ck_refgen)(pTHX_ OP *) = 0;
305 STATIC OP *so_ck_refgen(pTHX_ OP *o) {
306 o = CALL_FPTR(so_old_ck_refgen)(aTHX_ o);
313 while (kid->op_flags & OPf_KIDS) {
315 kid = cUNOPx(kid)->op_first;
321 for (kid; kid; prev = kid, kid = kid->op_sibling) {
324 const sub_op_config_t *c;
326 if (kid->op_type != OP_RV2CV)
329 gvop = so_find_gvop(kid);
333 gv = cGVOPx_gv(gvop);
337 const char *name = GvNAME(gv);
338 I32 len = GvNAMELEN(gv);
341 svp = hv_fetch(MY_CXT.map, name, len, 0);
345 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
349 OP *new_kid = CALL_FPTR(c->ref)(aTHX_ kid, c->ud);
351 if (new_kid != kid) {
352 new_kid->op_sibling = kid->op_sibling;
353 new_kid->op_next = new_kid;
355 prev->op_sibling = new_kid;
357 cUNOPx(parent)->op_first = new_kid;
369 STATIC OP *(*so_old_ck_gelem)(pTHX_ OP *) = 0;
371 STATIC OP *so_ck_gelem(pTHX_ OP *o) {
372 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
378 rv2gv = cUNOPo->op_first;
382 gvop = cUNOPx(rv2gv)->op_first;
383 if (!gvop || gvop->op_type != OP_GV)
386 gv = cGVOPx_gv(gvop);
394 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
405 /* --- XS ------------------------------------------------------------------ */
407 MODULE = Sub::Op PACKAGE = Sub::Op
414 MY_CXT.map = newHV();
415 MY_CXT.placeholder = NULL;
418 #endif /* SO_THREADSAFE */
420 so_old_ck_entersub = PL_check[OP_ENTERSUB];
421 PL_check[OP_ENTERSUB] = so_ck_entersub;
422 so_old_ck_refgen = PL_check[OP_REFGEN];
423 PL_check[OP_REFGEN] = so_ck_refgen;
424 so_old_ck_gelem = PL_check[OP_GELEM];
425 PL_check[OP_GELEM] = so_ck_gelem;
440 owner = MY_CXT.owner;
441 map = (HV *) so_clone((SV *) MY_CXT.map, owner);
442 placeholder = (CV *) so_clone((SV *) MY_CXT.placeholder, owner);
447 MY_CXT.placeholder = placeholder;
452 #endif /* SO_THREADSAFE */
460 if (SvTYPE(sv) >= SVt_PVCV) {
462 SvREFCNT_dec(MY_CXT.placeholder);
463 MY_CXT.placeholder = (CV *) SvREFCNT_inc(sv);
469 _constant_sub(SV *sv)
475 if (SvTYPE(sv) < SVt_PVCV)
477 ST(0) = sv_2mortal(newSVuv(CvCONST(sv)));
481 _get_prototype(SV *name)
485 const sub_op_config_t *c;
488 he = hv_fetch_ent(MY_CXT.map, name, 0, 0);
491 c = INT2PTR(const sub_op_config_t *, SvIVX(HeVAL(he)));
494 ST(0) = sv_2mortal(newSVpvn(c->proto, c->protolen));