Using GetLockStatusData in main

Hi,

 Iam trying to collect informatin about the locks in postgresql and I am thinking about making a call to GetLockStatusData (present in /src/backend/storage/lmrg/lock.c) from src/backend/main/main.c . Would the informatin I collect by calling GetLockStatusData in

src/backend/main/main.c  be accurate representation of the locks presently being held or waited on in postgresql?

thank you

J