int mc_options_get_progress_usec (const struct mc_options *);
void mc_options_set_progress_usec (struct mc_options *, int progress_usec);
mc_progress_func *mc_options_get_progress_func (const struct mc_options *);
int mc_options_get_progress_usec (const struct mc_options *);
void mc_options_set_progress_usec (struct mc_options *, int progress_usec);
mc_progress_func *mc_options_get_progress_func (const struct mc_options *);