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 STATIC const char *so_strndup(pTHX_ const char *s, STRLEN len) {
119 #define so_strndup(S, L) so_strndup(aTHX_ (S), (L))
125 d = PerlMemShared_malloc(len + 1);
126 Copy(s, d, len, char);
127 ((char *) d)[len] = '\0';
132 sub_op_config_t *sub_op_dup(pTHX_ const sub_op_config_t *orig) {
133 sub_op_config_t *dupe = PerlMemShared_malloc(sizeof *dupe);
135 dupe->name = so_strndup(orig->name, orig->namelen);
136 dupe->namelen = orig->namelen;
138 dupe->proto = so_strndup(orig->proto, orig->protolen);
139 dupe->protolen = orig->protolen;
141 dupe->call = orig->call;
142 dupe->ref = orig->ref;
148 void sub_op_free(pTHX_ sub_op_config_t *c) {
149 PerlMemShared_free((char *) c->name);
150 PerlMemShared_free(c);
155 OP *sub_op_study(const OP *o, OP **last_arg_p, OP **rv2cv_p) {
156 OP *ex_list, *last_arg, *rv2cv, *gvop;
158 ex_list = cUNOPo->op_first;
159 /* pushmark when a method call */
160 if (!ex_list || ex_list->op_type != OP_NULL)
163 rv2cv = cUNOPx(ex_list)->op_first;
168 OP *next = rv2cv->op_sibling;
175 if (!(rv2cv->op_flags & OPf_KIDS))
178 gvop = cUNOPx(rv2cv)->op_first;
180 if (gvop && gvop->op_type == OP_GV)
190 *last_arg_p = last_arg;
197 /* --- Private helpers ----------------------------------------------------- */
199 STATIC IV so_hint(pTHX) {
200 #define so_hint() so_hint(aTHX)
203 #if SO_HAS_PERL(5, 9, 5)
204 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
206 __PACKAGE__, __PACKAGE_LEN__,
211 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
218 return (SvOK(hint) && SvIOK(hint)) ? SvIVX(hint) : 0;
221 STATIC OP *so_find_gvop(const OP *o) {
222 OP *ex_list, *last_arg, *rv2cv, *gvop;
224 ex_list = cUNOPo->op_first;
225 /* pushmark when a method call */
226 if (!ex_list || ex_list->op_type != OP_NULL)
229 rv2cv = cUNOPx(ex_list)->op_first;
234 OP *next = rv2cv->op_sibling;
240 if (!(rv2cv->op_flags & OPf_KIDS))
243 gvop = cUNOPx(rv2cv)->op_first;
244 if (gvop && gvop->op_type == OP_GV)
251 STATIC OP *(*so_old_ck_entersub)(pTHX_ OP *) = 0;
253 STATIC OP *so_ck_entersub(pTHX_ OP *o) {
254 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
260 if (o->op_type != OP_ENTERSUB)
262 if (o->op_private & OPpENTERSUB_AMPER) /* hopefully \&foo */
265 gvop = so_find_gvop(o);
269 gv = cGVOPx_gv(gvop);
274 const char *name = GvNAME(gv);
275 I32 len = GvNAMELEN(gv);
276 const sub_op_config_t *c;
279 svp = hv_fetch(MY_CXT.map, name, len, 0);
283 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
285 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
291 o = CALL_FPTR(c->call)(aTHX_ o, c->ud);
299 STATIC OP *(*so_old_ck_refgen)(pTHX_ OP *) = 0;
301 STATIC OP *so_ck_refgen(pTHX_ OP *o) {
302 o = CALL_FPTR(so_old_ck_refgen)(aTHX_ o);
309 while (kid->op_flags & OPf_KIDS) {
311 kid = cUNOPx(kid)->op_first;
317 for (kid; kid; prev = kid, kid = kid->op_sibling) {
320 const sub_op_config_t *c;
322 if (kid->op_type != OP_RV2CV)
325 gvop = so_find_gvop(kid);
329 gv = cGVOPx_gv(gvop);
333 const char *name = GvNAME(gv);
334 I32 len = GvNAMELEN(gv);
337 svp = hv_fetch(MY_CXT.map, name, len, 0);
341 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
345 OP *new_kid = CALL_FPTR(c->ref)(aTHX_ kid, c->ud);
347 if (new_kid != kid) {
348 new_kid->op_sibling = kid->op_sibling;
349 new_kid->op_next = new_kid;
351 prev->op_sibling = new_kid;
353 cUNOPx(parent)->op_first = new_kid;
365 STATIC OP *(*so_old_ck_gelem)(pTHX_ OP *) = 0;
367 STATIC OP *so_ck_gelem(pTHX_ OP *o) {
368 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
374 rv2gv = cUNOPo->op_first;
378 gvop = cUNOPx(rv2gv)->op_first;
379 if (!gvop || gvop->op_type != OP_GV)
382 gv = cGVOPx_gv(gvop);
390 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
401 /* --- XS ------------------------------------------------------------------ */
403 MODULE = Sub::Op PACKAGE = Sub::Op
410 MY_CXT.map = newHV();
411 MY_CXT.placeholder = NULL;
414 #endif /* SO_THREADSAFE */
416 so_old_ck_entersub = PL_check[OP_ENTERSUB];
417 PL_check[OP_ENTERSUB] = so_ck_entersub;
418 so_old_ck_refgen = PL_check[OP_REFGEN];
419 PL_check[OP_REFGEN] = so_ck_refgen;
420 so_old_ck_gelem = PL_check[OP_GELEM];
421 PL_check[OP_GELEM] = so_ck_gelem;
436 owner = MY_CXT.owner;
437 map = (HV *) so_clone((SV *) MY_CXT.map, owner);
438 placeholder = (CV *) so_clone((SV *) MY_CXT.placeholder, owner);
443 MY_CXT.placeholder = placeholder;
448 #endif /* SO_THREADSAFE */
456 if (SvTYPE(sv) >= SVt_PVCV) {
458 SvREFCNT_dec(MY_CXT.placeholder);
459 MY_CXT.placeholder = (CV *) SvREFCNT_inc(sv);
465 _constant_sub(SV *sv)
471 if (SvTYPE(sv) < SVt_PVCV)
473 ST(0) = sv_2mortal(newSVuv(CvCONST(sv)));
477 _get_prototype(SV *name)
481 const sub_op_config_t *c;
484 he = hv_fetch_ent(MY_CXT.map, name, 0, 0);
487 c = INT2PTR(const sub_op_config_t *, SvIVX(HeVAL(he)));
490 ST(0) = sv_2mortal(newSVpvn(c->proto, c->protolen));