Zephyr queueing system data model. Includes definition of JSON queue message that is serializable and deserializable (credit to https://github.com/nlohmann/json).
Run make to build library archive. To use archive externally, install lib/message.a into ext directory of a separate project, and compile with:
gcc src/main.o src/blah1.o src/blah2.o -L ext/message.a