How to custom copy function of TBB flowgraph's broadcast_node

[Ds_Good]

How can I use the broadcast_node of TBB to customize the copying of node data? Since my data is quite large and encapsulated with std::shared_ptr, now I need to automatically complete the customized copying when the broadcast_node outputs. How should I achieve this?

[digixvalley]

To customize the copying behavior in TBB's broadcast_node, you can use a function_node to apply custom logic to each message before it reaches the broadcast stage:

Steps:

1. Create a Custom Node: Use a function_node to process or modify messages as needed (e.g., apply a custom copy or transformation). This node will handle any pre-broadcast customization.
2. Connect to Broadcast: Link the function_node to a broadcast_node, which will then distribute the modified message to all connected receivers.

Example Workflow:

• The custom node processes each message, performing the desired customization (e.g., doubling the value or applying a specific transformation).
• The broadcast node receives the modified message from the custom node and forwards it to multiple receiver nodes.
• Receiver nodes then process the final message.

This approach gives you flexibility in how each message is copied or transformed before being sent to multiple destinations.