private static extern int uv_idle_start(IntPtr idle, uv_handle_cb callback);
static extern int uv_check_start(IntPtr check, uv_handle_cb callback);
private static extern int uv_prepare_start(IntPtr prepare, uv_handle_cb callback);
private static extern int uv_async_init(IntPtr loop, IntPtr handle, uv_handle_cb callback);
static extern int uv_async_init(IntPtr loop, IntPtr handle, uv_handle_cb callback);
static extern int uv_idle_start(IntPtr idle, uv_handle_cb callback);
static extern int uv_prepare_start(IntPtr prepare, uv_handle_cb callback);