/* file becomes the CvFILE. For an XS, it's supposed to be static storage,
and so doesn't get free()d. (It's expected to be from the C pre-
processor __FILE__ directive). But we need a dynamically allocated one,
- and we need it to get freed. So we cheat, and take advantage of the
- fact that the first 0 bytes of any string always look the same. */
- cv = newXS(name, const_sv_xsub, file);
+ and we need it to get freed. */
+ cv = newXS_flags(name, const_sv_xsub, file, "", XS_DYNAMIC_FILENAME);
CvXSUBANY(cv).any_ptr = sv;
CvCONST_on(cv);
- /* prototype is "". But this gets free()d. :-) */
- sv_usepvn_flags((SV*)cv, file, len, SV_HAS_TRAILING_NUL);
- /* This gives us a prototype of "", rather than the file name. */
- SvCUR_set(cv, 0);
#ifdef USE_ITHREADS
if (stash)
return cv;
}
+CV *
+Perl_newXS_flags(pTHX_ const char *name, XSUBADDR_t subaddr,
+ const char *const filename, const char *const proto,
+ U32 flags)
+{
+ CV *cv = newXS(name, subaddr, filename);
+
+ if (flags & XS_DYNAMIC_FILENAME) {
+ /* We need to "make arrangements" (ie cheat) to ensure that the
+ filename lasts as long as the PVCV we just created, but also doesn't
+ leak */
+ STRLEN filename_len = strlen(filename);
+ STRLEN proto_and_file_len = filename_len;
+ char *proto_and_file;
+ STRLEN proto_len;
+
+ if (proto) {
+ proto_len = strlen(proto);
+ proto_and_file_len += proto_len;
+
+ Newx(proto_and_file, proto_and_file_len + 1, char);
+ Copy(proto, proto_and_file, proto_len, char);
+ Copy(filename, proto_and_file + proto_len, filename_len + 1, char);
+ } else {
+ proto_len = 0;
+ proto_and_file = savepvn(filename, filename_len);
+ }
+
+ /* This gets free()d. :-) */
+ sv_usepvn_flags((SV*)cv, proto_and_file, proto_and_file_len,
+ SV_HAS_TRAILING_NUL);
+ if (proto) {
+ /* This gives us the correct prototype, rather than one with the
+ file name appended. */
+ SvCUR_set(cv, proto_len);
+ } else {
+ SvPOK_off(cv);
+ }
+ } else {
+ sv_setpv((SV *)cv, proto);
+ }
+ return cv;
+}
+
/*
=for apidoc U||newXS
-Used by C<xsubpp> to hook up XSUBs as Perl subs.
+Used by C<xsubpp> to hook up XSUBs as Perl subs. I<filename> needs to be
+static storage, as it is used directly as CvFILE(), without a copy being made.
=cut
*/