Function libevent_sys::evbuffer_add_reference

pub unsafe extern "C" fn evbuffer_add_reference(
    outbuf: *mut evbuffer, 
    data: *const c_void, 
    datlen: usize, 
    cleanupfn: evbuffer_ref_cleanup_cb, 
    cleanupfn_arg: *mut c_void
) -> c_int