=for apidoc hv_clear
Frees the all the elements of a hash, leaving it empty.
-The XS equivalent of %hash = (). See also L</hv_undef>.
+The XS equivalent of C<%hash = ()>. See also L</hv_undef>.
+
+If any destructors are triggered as a result, the hv itself may
+be freed.
=cut
*/
xhv = (XPVHV*)SvANY(hv);
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(hv));
if (SvREADONLY(hv) && HvARRAY(hv) != NULL) {
/* restricted hash: convert all keys to placeholders */
STRLEN i;
mro_isa_changed_in(hv);
HvEITER_set(hv, NULL);
}
+ LEAVE;
}
/*
/*
=for apidoc hv_undef
-Undefines the hash. The XS equivalent of undef(%hash).
+Undefines the hash. The XS equivalent of C<undef(%hash)>.
As well as freeing all the elements of the hash (like hv_clear()), this
also frees any auxiliary data and storage associated with the hash.
+
+If any destructors are triggered as a result, the hv itself may
+be freed.
+
See also L</hv_clear>.
=cut
dVAR;
register XPVHV* xhv;
const char *name;
+ const bool save = !!SvREFCNT(hv);
if (!hv)
return;
);
hv_name_set(hv, NULL, 0, 0);
}
+ if (save) {
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(hv));
+ }
hfreeentries(hv);
if (SvOOK(hv)) {
struct xpvhv_aux * const aux = HvAUX(hv);
xhv->xhv_max = 7; /* HvMAX(hv) = 7 (it's a normal hash) */
HvARRAY(hv) = 0;
}
- HvPLACEHOLDERS_set(hv, 0);
+ /* if we're freeing the HV, the SvMAGIC field has been reused for
+ * other purposes, and so there can't be any placeholder magic */
+ if (SvREFCNT(hv))
+ HvPLACEHOLDERS_set(hv, 0);
if (SvRMAGICAL(hv))
mg_clear(MUTABLE_SV(hv));
+ if (save) LEAVE;
}
/*
set the placeholders keys (for restricted hashes) will be returned in addition
to normal keys. By default placeholders are automatically skipped over.
Currently a placeholder is implemented with a value that is
-C<&Perl_sv_placeholder>. Note that the implementation of placeholders and
+C<&PL_sv_placeholder>. Note that the implementation of placeholders and
restricted hashes may change, and the implementation currently is
insufficiently abstracted for any change to be tidy.
memEQ(HEK_KEY(chain->refcounted_he_hek), keypv, keylen) &&
utf8_flag == (HEK_FLAGS(chain->refcounted_he_hek) & HVhek_UTF8)
#endif
- )
- return
- flags & REFCOUNTED_HE_EXISTS
- ? (chain->refcounted_he_data[0] & HVrhek_typemask)
- == HVrhek_delete
- ? NULL
- : &PL_sv_yes
- : sv_2mortal(refcounted_he_value(chain));
+ ) {
+ if (flags & REFCOUNTED_HE_EXISTS)
+ return (chain->refcounted_he_data[0] & HVrhek_typemask)
+ == HVrhek_delete
+ ? NULL : &PL_sv_yes;
+ return sv_2mortal(refcounted_he_value(chain));
+ }
}
return flags & REFCOUNTED_HE_EXISTS ? NULL : &PL_sv_placeholder;
}
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
- * indent-tabs-mode: t
+ * indent-tabs-mode: nil
* End:
*
- * ex: set ts=8 sts=4 sw=4 noet:
+ * ex: set ts=8 sts=4 sw=4 et:
*/