-#if defined(USE_ITHREADS)
-PERL_CALLCONV void Perl_sharedsv_init(pTHX);
-PERL_CALLCONV shared_sv* Perl_sharedsv_new(pTHX);
-PERL_CALLCONV shared_sv* Perl_sharedsv_find(pTHX_ SV* sv);
-PERL_CALLCONV void Perl_sharedsv_lock(pTHX_ shared_sv* ssv);
-PERL_CALLCONV void Perl_sharedsv_unlock(pTHX_ shared_sv* ssv);
-PERL_CALLCONV void Perl_sharedsv_unlock_scope(pTHX_ shared_sv* ssv);
-PERL_CALLCONV void Perl_sharedsv_thrcnt_inc(pTHX_ shared_sv* ssv);
-PERL_CALLCONV void Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv);
-#endif
-