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))))))
16 /* ... Thread safety and multiplicity ...................................... */
18 #ifndef SO_MULTIPLICITY
19 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
20 # define SO_MULTIPLICITY 1
22 # define SO_MULTIPLICITY 0
25 #if SO_MULTIPLICITY && !defined(tTHX)
26 # define tTHX PerlInterpreter*
29 #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))
30 # define SO_THREADSAFE 1
32 # define MY_CXT_CLONE \
34 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
35 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
36 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
39 # define SO_THREADSAFE 0
41 # define dMY_CXT dNOOP
43 # define MY_CXT indirect_globaldata
45 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
47 # define MY_CXT_INIT NOOP
49 # define MY_CXT_CLONE NOOP
52 /* --- Global data --------------------------------------------------------- */
54 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
61 #endif /* SO_THREADSAFE */
68 STATIC SV *so_clone(pTHX_ SV *sv, tTHX owner) {
69 #define so_clone(S, O) so_clone(aTHX_ (S), (O))
74 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
77 param.stashes = stashes;
79 param.proto_perl = owner;
81 dupsv = sv_dup(sv, ¶m);
85 SvREFCNT_dec(stashes);
88 return SvREFCNT_inc(dupsv);
91 #endif /* SO_THREADSAFE */
93 /* --- Public API ---------------------------------------------------------- */
97 void sub_op_init(sub_op_config_t *c) {
109 void sub_op_register(pTHX_ const sub_op_config_t *c, U32 flags) {
112 if (!(flags & SUB_OP_REGISTER_STEAL))
113 c = sub_op_dup(aTHX_ c);
115 (void) hv_store(MY_CXT.map, c->name, c->namelen, newSViv(PTR2IV(c)), 0);
118 sub_op_config_t *sub_op_dup(pTHX_ const sub_op_config_t *orig) {
120 sub_op_config_t *dupe = PerlMemShared_malloc(sizeof *dupe);
124 dupe->name = PerlMemShared_malloc(len + 1);
125 Copy(orig->name, dupe->name, len, char);
126 ((char *) dupe->name)[len] = '\0';
132 len = orig->protolen;
134 dupe->proto = PerlMemShared_malloc(len + 1);
135 Copy(orig->proto, dupe->proto, len, char);
136 ((char *) dupe->proto)[len] = '\0';
140 dupe->protolen = len;
142 dupe->call = orig->call;
143 dupe->ref = orig->ref;
149 void sub_op_free(pTHX_ sub_op_config_t *c) {
150 PerlMemShared_free((char *) c->name);
151 PerlMemShared_free(c);
156 OP *sub_op_study(const OP *o, OP **last_arg_p, OP **rv2cv_p) {
157 OP *ex_list, *last_arg, *rv2cv, *gvop;
159 ex_list = cUNOPo->op_first;
160 /* pushmark when a method call */
161 if (!ex_list || ex_list->op_type != OP_NULL)
164 rv2cv = cUNOPx(ex_list)->op_first;
169 OP *next = rv2cv->op_sibling;
176 if (!(rv2cv->op_flags & OPf_KIDS))
179 gvop = cUNOPx(rv2cv)->op_first;
181 if (gvop && gvop->op_type == OP_GV)
191 *last_arg_p = last_arg;
198 /* --- Private helpers ----------------------------------------------------- */
200 STATIC IV so_hint(pTHX) {
201 #define so_hint() so_hint(aTHX)
204 #if SO_HAS_PERL(5, 9, 5)
205 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
207 __PACKAGE__, __PACKAGE_LEN__,
212 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
219 return (SvOK(hint) && SvIOK(hint)) ? SvIVX(hint) : 0;
222 STATIC OP *so_find_gvop(const OP *o) {
223 OP *ex_list, *last_arg, *rv2cv, *gvop;
225 ex_list = cUNOPo->op_first;
226 /* pushmark when a method call */
227 if (!ex_list || ex_list->op_type != OP_NULL)
230 rv2cv = cUNOPx(ex_list)->op_first;
235 OP *next = rv2cv->op_sibling;
241 if (!(rv2cv->op_flags & OPf_KIDS))
244 gvop = cUNOPx(rv2cv)->op_first;
245 if (gvop && gvop->op_type == OP_GV)
252 STATIC OP *(*so_old_ck_entersub)(pTHX_ OP *) = 0;
254 STATIC OP *so_ck_entersub(pTHX_ OP *o) {
255 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
261 if (o->op_type != OP_ENTERSUB)
263 if (o->op_private & OPpENTERSUB_AMPER) /* hopefully \&foo */
266 gvop = so_find_gvop(o);
270 gv = cGVOPx_gv(gvop);
275 const char *name = GvNAME(gv);
276 I32 len = GvNAMELEN(gv);
277 const sub_op_config_t *c;
280 svp = hv_fetch(MY_CXT.map, name, len, 0);
284 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
286 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
292 o = CALL_FPTR(c->call)(aTHX_ o, c->ud);
300 STATIC OP *(*so_old_ck_refgen)(pTHX_ OP *) = 0;
302 STATIC OP *so_ck_refgen(pTHX_ OP *o) {
303 o = CALL_FPTR(so_old_ck_refgen)(aTHX_ o);
310 while (kid->op_flags & OPf_KIDS) {
312 kid = cUNOPx(kid)->op_first;
318 for (kid; kid; prev = kid, kid = kid->op_sibling) {
321 const sub_op_config_t *c;
323 if (kid->op_type != OP_RV2CV)
326 gvop = so_find_gvop(kid);
330 gv = cGVOPx_gv(gvop);
334 const char *name = GvNAME(gv);
335 I32 len = GvNAMELEN(gv);
338 svp = hv_fetch(MY_CXT.map, name, len, 0);
342 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
346 OP *new_kid = CALL_FPTR(c->ref)(aTHX_ kid, c->ud);
348 if (new_kid != kid) {
349 new_kid->op_sibling = kid->op_sibling;
350 new_kid->op_next = new_kid;
352 prev->op_sibling = new_kid;
354 cUNOPx(parent)->op_first = new_kid;
366 STATIC OP *(*so_old_ck_gelem)(pTHX_ OP *) = 0;
368 STATIC OP *so_ck_gelem(pTHX_ OP *o) {
369 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
375 rv2gv = cUNOPo->op_first;
379 gvop = cUNOPx(rv2gv)->op_first;
380 if (!gvop || gvop->op_type != OP_GV)
383 gv = cGVOPx_gv(gvop);
391 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
402 /* --- XS ------------------------------------------------------------------ */
404 MODULE = Sub::Op PACKAGE = Sub::Op
411 MY_CXT.map = newHV();
412 MY_CXT.placeholder = NULL;
415 #endif /* SO_THREADSAFE */
417 so_old_ck_entersub = PL_check[OP_ENTERSUB];
418 PL_check[OP_ENTERSUB] = so_ck_entersub;
419 so_old_ck_refgen = PL_check[OP_REFGEN];
420 PL_check[OP_REFGEN] = so_ck_refgen;
421 so_old_ck_gelem = PL_check[OP_GELEM];
422 PL_check[OP_GELEM] = so_ck_gelem;
437 owner = MY_CXT.owner;
438 map = (HV *) so_clone((SV *) MY_CXT.map, owner);
439 placeholder = (CV *) so_clone((SV *) MY_CXT.placeholder, owner);
444 MY_CXT.placeholder = placeholder;
449 #endif /* SO_THREADSAFE */
457 if (SvTYPE(sv) >= SVt_PVCV) {
459 SvREFCNT_dec(MY_CXT.placeholder);
460 MY_CXT.placeholder = (CV *) SvREFCNT_inc(sv);
466 _constant_sub(SV *sv)
472 if (SvTYPE(sv) < SVt_PVCV)
474 ST(0) = sv_2mortal(newSVuv(CvCONST(sv)));
478 _get_prototype(SV *name)
482 const sub_op_config_t *c;
485 he = hv_fetch_ent(MY_CXT.map, name, 0, 0);
488 c = INT2PTR(const sub_op_config_t *, SvIVX(HeVAL(he)));
491 ST(0) = sv_2mortal(newSVpvn(c->proto, c->protolen));