cvRunAsync0<T> function

Future<T> cvRunAsync0<T>(Pointer<CvStatus> func(CvCallback_0 callback), void onComplete(Completer<T> completer))

Implementation

Future<T> cvRunAsync0<T>(
  ffi.Pointer<cvg.CvStatus> Function(cvg.CvCallback_0 callback) func,
  void Function(Completer<T> completer) onComplete,
) async {
  final completer = Completer<T>();
  late final ffi.NativeCallable<cvg.CvCallback_0Function> ccallback;
  var closed = false;
  void close() {
    if (!closed) {
      closed = true;
      ccallback.close();
    }
  }

  void onResponse() {
    onComplete(completer);
    close();
  }

  ccallback = ffi.NativeCallable.listener(onResponse);
  try {
    throwIfFailed(func(ccallback.nativeFunction));
  } catch (_) {
    close();
    rethrow;
  }
  return completer.future;
}