Function jack_sys::jack_get_cycle_times

pub unsafe extern fn jack_get_cycle_times(client: *const jack_client_t,
                                          current_frames: *mut jack_nframes_t,
                                          current_usecs: *mut jack_time_t,
                                          next_usecs: *mut jack_time_t,
                                          period_usecs: *mut c_float)
                                          -> c_int