pgsql: Clarify what is protected by WaitLSNLock - Mailing list pgsql-committers

Clarify what is protected by WaitLSNLock

Not just WaitLSNState.waitersHeap, but also WaitLSNState.procInfos and
updating of WaitLSNState.minWaitedLSN is protected by WaitLSNLock.  There
is one now documented exclusion on fast-path checking of
WaitLSNProcInfo.inHeap flag.

Discussion: https://postgr.es/m/202404030658.hhj3vfxeyhft%40alvherre.pgsql

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/ee79928441e7e291532b833455ebfee27d7cab5c

Modified Files
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src/backend/commands/waitlsn.c | 10 ++++++++--
src/include/commands/waitlsn.h |  7 +++++--
2 files changed, 13 insertions(+), 4 deletions(-)