Topology
One of the goals of GRAS is to be able to dynamically reconfigure the flow graph while it executes. A lightweight library, Apology (short for Actor Topology) was created to facilitate the comprehension of hierarchy and connections, and to deal with such in a thread-safe manner:
The project page is here: https://github.com/guruofquality/Apology
So, there isnt much in Apology. This project is just directly submoduled and compiled into GRAS. But in its simplicity, it is powerful:
One of the nice things about Apology is that GRAS needs little or no information about how to handle connections and hierarchy; allowing the implementation of GRAS to be simpler and more on focus.
Simply as a side-effect of the implementation of Apology, the following long-term GNU Radio issues have been addressed:
- users will be able to connect and disconnect blocks in a live flow graph
- hierarchical blocks can have optional or dynamic number of ports
- hierarchical blocks will be able to internally connect inputs to outputs
- recover from exceptions thrown in hierarchical block constructors