How do we get the actual pgproc object from the
SHMEM_OFFSET proc /* link to pgproc of owning backend*/ in the PROCLOCKTAG struct in file Lock.h
The same question also for SHMEM_OFFSET lock /*link to per-lockable-object information*/ in the same struct
Is SHMEM_OFFSET a pointer to an address which has the "header" of the unique pgproc object? '
So, again, how to get the actual PGPROC and LOCK object from SHMEM_OFFSET?
Any help will be greatly appreciated,

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