Tom Lane <tgl@sss.pgh.pa.us> writes:
> creatingOffsetZero will be a bool that gets set before releasing
> MultiXactGenLock if offset 0 is being returned, and then we clear it
> after updating the slru data structures if we had starting offset 0.
If you're going to have a special flag indicating this couldn't you just have
a special flag indicating that the offset isn't ready yet? Loop until that
flag is cleared instead of looking for offset != 0 at all.
--
greg