Function libevent_sys::bufferevent_filter_new

pub unsafe extern "C" fn bufferevent_filter_new(
    underlying: *mut bufferevent, 
    input_filter: bufferevent_filter_cb, 
    output_filter: bufferevent_filter_cb, 
    options: c_int, 
    free_context: Option<unsafe extern "C" fn(arg1: *mut c_void)>, 
    ctx: *mut c_void
) -> *mut bufferevent