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 #if defined(OP_CHECK_MUTEX_LOCK) && defined(OP_CHECK_MUTEX_UNLOCK)
57 # define SO_CHECK_MUTEX_LOCK OP_CHECK_MUTEX_LOCK
58 # define SO_CHECK_MUTEX_UNLOCK OP_CHECK_MUTEX_UNLOCK
60 # define SO_CHECK_MUTEX_LOCK OP_REFCNT_LOCK
61 # define SO_CHECK_MUTEX_UNLOCK OP_REFCNT_UNLOCK
64 typedef OP *(*so_ck_t)(pTHX_ OP *);
66 #ifdef wrap_op_checker
68 # define so_ck_replace(T, NC, OCP) wrap_op_checker((T), (NC), (OCP))
72 STATIC void so_ck_replace(pTHX_ OPCODE type, so_ck_t new_ck, so_ck_t *old_ck_p){
73 #define so_ck_replace(T, NC, OCP) so_ck_replace(aTHX_ (T), (NC), (OCP))
76 *old_ck_p = PL_check[type];
77 PL_check[type] = new_ck;
79 SO_CHECK_MUTEX_UNLOCK;
84 STATIC void so_ck_restore(pTHX_ OPCODE type, so_ck_t *old_ck_p) {
85 #define so_ck_restore(T, OCP) so_ck_restore(aTHX_ (T), (OCP))
88 PL_check[type] = *old_ck_p;
91 SO_CHECK_MUTEX_UNLOCK;
94 /* --- Global data --------------------------------------------------------- */
96 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
103 #endif /* SO_THREADSAFE */
110 STATIC SV *so_clone(pTHX_ SV *sv, tTHX owner) {
111 #define so_clone(S, O) so_clone(aTHX_ (S), (O))
116 if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
119 param.stashes = stashes;
121 param.proto_perl = owner;
123 dupsv = sv_dup(sv, ¶m);
127 SvREFCNT_dec(stashes);
130 return SvREFCNT_inc(dupsv);
133 #endif /* SO_THREADSAFE */
135 /* --- Public API ---------------------------------------------------------- */
139 void sub_op_init(sub_op_config_t *c) {
151 void sub_op_register(pTHX_ const sub_op_config_t *c, U32 flags) {
154 if (!(flags & SUB_OP_REGISTER_STEAL))
155 c = sub_op_dup(aTHX_ c);
157 (void) hv_store(MY_CXT.map, c->name, c->namelen, newSViv(PTR2IV(c)), 0);
160 STATIC const char *so_strndup(pTHX_ const char *s, STRLEN len) {
161 #define so_strndup(S, L) so_strndup(aTHX_ (S), (L))
167 d = PerlMemShared_malloc(len + 1);
168 Copy(s, d, len, char);
169 ((char *) d)[len] = '\0';
174 sub_op_config_t *sub_op_dup(pTHX_ const sub_op_config_t *orig) {
175 sub_op_config_t *dupe = PerlMemShared_malloc(sizeof *dupe);
177 dupe->name = so_strndup(orig->name, orig->namelen);
178 dupe->namelen = orig->namelen;
180 dupe->proto = so_strndup(orig->proto, orig->protolen);
181 dupe->protolen = orig->protolen;
183 dupe->call = orig->call;
184 dupe->ref = orig->ref;
190 void sub_op_free(pTHX_ sub_op_config_t *c) {
191 PerlMemShared_free((char *) c->name);
192 PerlMemShared_free(c);
197 OP *sub_op_study(const OP *o, OP **last_arg_p, OP **rv2cv_p) {
198 OP *ex_list, *last_arg, *rv2cv, *gvop;
200 ex_list = cUNOPo->op_first;
201 /* pushmark when a method call */
202 if (!ex_list || ex_list->op_type != OP_NULL)
205 rv2cv = cUNOPx(ex_list)->op_first;
210 OP *next = rv2cv->op_sibling;
217 if (!(rv2cv->op_flags & OPf_KIDS))
220 gvop = cUNOPx(rv2cv)->op_first;
222 if (gvop && gvop->op_type == OP_GV)
232 *last_arg_p = last_arg;
239 /* --- Private helpers ----------------------------------------------------- */
241 STATIC IV so_hint(pTHX) {
242 #define so_hint() so_hint(aTHX)
245 #if SO_HAS_PERL(5, 9, 5)
246 hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
248 __PACKAGE__, __PACKAGE_LEN__,
253 SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
260 return (SvOK(hint) && SvIOK(hint)) ? SvIVX(hint) : 0;
263 STATIC OP *so_find_gvop(const OP *o) {
264 OP *ex_list, *last_arg, *rv2cv, *gvop;
266 ex_list = cUNOPo->op_first;
267 /* pushmark when a method call */
268 if (!ex_list || ex_list->op_type != OP_NULL)
271 rv2cv = cUNOPx(ex_list)->op_first;
276 OP *next = rv2cv->op_sibling;
282 if (!(rv2cv->op_flags & OPf_KIDS))
285 gvop = cUNOPx(rv2cv)->op_first;
286 if (gvop && gvop->op_type == OP_GV)
293 STATIC OP *(*so_old_ck_entersub)(pTHX_ OP *) = 0;
295 STATIC OP *so_ck_entersub(pTHX_ OP *o) {
296 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
302 if (o->op_type != OP_ENTERSUB)
304 if (o->op_private & OPpENTERSUB_AMPER) /* hopefully \&foo */
307 gvop = so_find_gvop(o);
311 gv = cGVOPx_gv(gvop);
316 const char *name = GvNAME(gv);
317 I32 len = GvNAMELEN(gv);
318 const sub_op_config_t *c;
321 svp = hv_fetch(MY_CXT.map, name, len, 0);
325 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
327 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
333 o = CALL_FPTR(c->call)(aTHX_ o, c->ud);
341 STATIC OP *(*so_old_ck_refgen)(pTHX_ OP *) = 0;
343 STATIC OP *so_ck_refgen(pTHX_ OP *o) {
344 o = CALL_FPTR(so_old_ck_refgen)(aTHX_ o);
351 while (kid->op_flags & OPf_KIDS) {
353 kid = cUNOPx(kid)->op_first;
359 for (kid; kid; prev = kid, kid = kid->op_sibling) {
362 const sub_op_config_t *c;
364 if (kid->op_type != OP_RV2CV)
367 gvop = so_find_gvop(kid);
371 gv = cGVOPx_gv(gvop);
375 const char *name = GvNAME(gv);
376 I32 len = GvNAMELEN(gv);
379 svp = hv_fetch(MY_CXT.map, name, len, 0);
383 c = INT2PTR(const sub_op_config_t *, SvIVX(*svp));
387 OP *new_kid = CALL_FPTR(c->ref)(aTHX_ kid, c->ud);
389 if (new_kid != kid) {
390 new_kid->op_sibling = kid->op_sibling;
391 new_kid->op_next = new_kid;
393 prev->op_sibling = new_kid;
395 cUNOPx(parent)->op_first = new_kid;
407 STATIC OP *(*so_old_ck_gelem)(pTHX_ OP *) = 0;
409 STATIC OP *so_ck_gelem(pTHX_ OP *o) {
410 o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
416 rv2gv = cUNOPo->op_first;
420 gvop = cUNOPx(rv2gv)->op_first;
421 if (!gvop || gvop->op_type != OP_GV)
424 gv = cGVOPx_gv(gvop);
432 if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
443 /* --- XS ------------------------------------------------------------------ */
445 MODULE = Sub::Op PACKAGE = Sub::Op
452 MY_CXT.map = newHV();
453 MY_CXT.placeholder = NULL;
456 #endif /* SO_THREADSAFE */
458 so_ck_replace(OP_ENTERSUB, so_ck_entersub, &so_old_ck_entersub);
459 so_ck_replace(OP_REFGEN, so_ck_refgen, &so_old_ck_refgen);
460 so_ck_replace(OP_GELEM, so_ck_gelem, &so_old_ck_gelem);
475 owner = MY_CXT.owner;
476 map = (HV *) so_clone((SV *) MY_CXT.map, owner);
477 placeholder = (CV *) so_clone((SV *) MY_CXT.placeholder, owner);
482 MY_CXT.placeholder = placeholder;
487 #endif /* SO_THREADSAFE */
495 if (SvTYPE(sv) >= SVt_PVCV) {
497 SvREFCNT_dec(MY_CXT.placeholder);
498 MY_CXT.placeholder = (CV *) SvREFCNT_inc(sv);
504 _constant_sub(SV *sv)
510 if (SvTYPE(sv) < SVt_PVCV)
512 ST(0) = sv_2mortal(newSVuv(CvCONST(sv)));
516 _get_prototype(SV *name)
520 const sub_op_config_t *c;
523 he = hv_fetch_ent(MY_CXT.map, name, 0, 0);
526 c = INT2PTR(const sub_op_config_t *, SvIVX(HeVAL(he)));
529 ST(0) = sv_2mortal(newSVpvn(c->proto, c->protolen));