Method Send

Parallel/Core/vtkCommunicator.cxx:144–203

------------------------------------------------------------------------------ Need to add better error checking

//------------------------------------------------------------------------------
// Need to add better error checking
int vtkCommunicator::Send(vtkDataObject* data, int remoteHandle, int tag)
{
  // If the receiving end is using with ANY_SOURCE, we have a problem because
  // some versions of MPI might deliver the multiple data objects require out of
  // order.  To get around this, on the first message we send the actual source
  // and a mangled tag.  The remote process then receives the rest of the
  // messages with the specific source and mangled tag, which are guaranteed to
  // be received in the correct order.
  static int tagMangler = 1000;
  int mangledTag = tag + tagMangler++;
  int header[2];
  header[0] = this->LocalProcessId;
  header[1] = mangledTag;
  this->Send(header, 2, remoteHandle, tag);
  tag = mangledTag;

  int data_type = data ? data->GetDataObjectType() : -1;
  this->Send(&data_type, 1, remoteHandle, tag);

  switch (data_type)
  {
    case -1:
      // nullptr data.
      return 1;

    // error on types we can't send
    case VTK_DATA_OBJECT:
    case VTK_DATA_SET:
    case VTK_PIECEWISE_FUNCTION:
    case VTK_POINT_SET:
    case VTK_UNIFORM_GRID:
    case VTK_GENERIC_DATA_SET:
    case VTK_HYPER_OCTREE:
    case VTK_COMPOSITE_DATA_SET:
    case VTK_HIERARCHICAL_BOX_DATA_SET: // obsolete
    case VTK_MULTIGROUP_DATA_SET:       // obsolete
    case VTK_HIERARCHICAL_DATA_SET:     // obsolete
    default:
      vtkWarningMacro(<< "Cannot send " << data->GetClassName());
      return 0;

    // send elemental data objects
    case VTK_DIRECTED_GRAPH:
    case VTK_UNDIRECTED_GRAPH:
    case VTK_IMAGE_DATA:
    case VTK_POLY_DATA:
    case VTK_RECTILINEAR_GRID:
    case VTK_STRUCTURED_GRID:
    case VTK_STRUCTURED_POINTS:
    case VTK_TABLE:
    case VTK_TREE:
    case VTK_UNSTRUCTURED_GRID:
    case VTK_MULTIBLOCK_DATA_SET:
    case VTK_UNIFORM_GRID_AMR:
    case VTK_OVERLAPPING_AMR:
    case VTK_PARTITIONED_DATA_SET:
    case VTK_PARTITIONED_DATA_SET_COLLECTION:
      return this->SendElementalDataObject(data, remoteHandle, tag);