C++ 层初始化

// Initialize `dart_api_dl.h`
DART_EXPORT intptr_t InitDartApiDL(void* data) {
  return Dart_InitializeApiDL(data);
}

DART_EXPORT void RegisterSendPort(Dart_Port send_port) {
  send_port_ = send_port;
}

Dart 层初始化

void doDynamicLinking() {
  Expect.isTrue(NativeApi.majorVersion == 2);
  Expect.isTrue(NativeApi.minorVersion >= 0);
  final initializeApi = testLibrary.lookupFunction<
      IntPtr Function(Pointer<Void>),
      int Function(Pointer<Void>)>("InitDartApiDL");
  Expect.isTrue(initializeApi(NativeApi.initializeApiDLData) == 0);
}

  final initializeApi = dl.lookupFunction<IntPtr Function(Pointer<Void>),
      int Function(Pointer<Void>)>("InitDartApiDL");
  Expect.isTrue(initializeApi(NativeApi.initializeApiDLData) == 0);

  final interactiveCppRequests = ReceivePort()..listen(handleCppRequests);
  final int nativePort = interactiveCppRequests.sendPort.nativePort;
  registerSendPort(nativePort);

final registerSendPort = dl.lookupFunction<Void Function(Int64 sendPort),
    void Function(int sendPort)>('RegisterSendPort');

https://github.com/archanpaul/medium-flutter_with_go/issues/3

使用

const bool result = Dart_PostCObject_DL(send_port, &dart_object);
  if (!result) {
    FATAL("C   :  Posting message to port failed.");
  }