scm_tc16_mutex = scm_make_smob_type ("mutex", sizeof (coop_m));
scm_tc16_condvar = scm_make_smob_type ("condition-variable", sizeof (coop_c));
scm_tc16_mutex = scm_make_smob_type ("mutex", sizeof (coop_m));
scm_tc16_condvar = scm_make_smob_type ("condition-variable", sizeof (coop_c));