Method PruneUnusedObjects

Serialization/Manager/vtkObjectManager.cxx:561–602

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//------------------------------------------------------------------------------
void vtkObjectManager::PruneUnusedObjects()
{
  // Find strong objects not referenced by states
  vtkMarshalContext::StrongObjectStore staleStrongObjects;
  for (const auto& iter : this->Context->StrongObjects())
  {
    for (const auto& object : iter.second)
    {
      auto identifier = this->Context->GetId(object);
      auto key = vtk::to_string(identifier);
      if (!this->Context->States().contains(key))
      {
        staleStrongObjects[iter.first].insert(object);
      }
    }
  }
  for (auto& iter : staleStrongObjects)
  {
    for (const auto& object : iter.second)
    {
      vtkVLog(this->GetObjectManagerLogVerbosity(),
        << "Remove stale strong object: " << iter.first << ":" << object);
      this->Context->Retire(iter.first, object);
    }
  }
  staleStrongObjects.clear();
  // Clear out stale weak references to objects
  std::vector<vtkTypeUInt32> staleIds;
  staleIds.reserve(this->Context->WeakObjects().size());
  for (const auto& iter : this->Context->WeakObjects())
  {
    if (iter.second == nullptr)
    {
      staleIds.emplace_back(iter.first);
      vtkVLog(this->GetObjectManagerLogVerbosity(), << "Remove stale object: " << iter.first);
    }
  }
  for (const auto& identifier : staleIds)
  {
    this->Context->UnRegisterObject(identifier);
  }
}

//------------------------------------------------------------------------------
void vtkObjectManager::PruneUnusedBlobs()