PERL_EXPORT_C IV PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab);
/* Raw */
-PERL_EXPORT_C PerlIO * PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *old, int narg, SV **args);
PERL_EXPORT_C IV PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab);
/* Stdio */
PERL_EXPORT_C SSize_t PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count);
PERL_EXPORT_C int PerlIOUnix_refcnt_dec(int fd);
PERL_EXPORT_C void PerlIOUnix_refcnt_inc(int fd);
+PERL_EXPORT_C int PerlIOUnix_refcnt(int fd);
PERL_EXPORT_C IV PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence);
PERL_EXPORT_C Off_t PerlIOUnix_tell(pTHX_ PerlIO *f);
PERL_EXPORT_C SSize_t PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count);