cs_m : critical section.
The thing is, even knowing 'm' stands for mutex, a google search of cs mutex doesn't lead to critical section, the meaning of cs as it turns out.
pto : I'm guessing it stands for 'pointer o' but what's the o, and where can I become more literate in the codebase as far as chosen variables and expressions are concerned? C++ reference material obvious doesn't refer/handle our naming conventions.
Edit: I am referring to Bitcoin Core. For example2.
pto appears 63 times in
src/net_processing.cpp - first on Line 4927