Perl_sys_intern_init
Perl_custom_op_name
Perl_custom_op_desc
-Perl_sharedsv_init
-Perl_sharedsv_new
-Perl_sharedsv_find
-Perl_sharedsv_lock
-Perl_sharedsv_unlock
-Perl_sharedsv_thrcnt_inc
-Perl_sharedsv_thrcnt_dec
+Perl_sv_nosharing
+Perl_sv_nolocking
+Perl_sv_nounlocking
Perl_sv_setsv_flags
Perl_sv_catpvn_flags
Perl_sv_catsv_flags