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Rename assorted LWLock tranches.

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Choose names that fit into the conventions for wait event names
(particularly, that multi-word names are in the style MultiWordName)
and hopefully convey more information to non-hacker users than the
previous names did.

Also rename SerializablePredicateLockListLock to
SerializablePredicateListLock; the old name was long enough to cause
table formatting problems, plus the double occurrence of "Lock" seems
confusing/error-prone.

Also change a couple of particularly opaque LWLock field names.

Discussion: https://postgr.es/m/28683.1589405363@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2020-05-15 18:11:03 -04:00
parent a0ab4f4909
commit 36ac359d36
15 changed files with 311 additions and 267 deletions
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8
src/include/storage/predicate_internals.h
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@@ -92,8 +92,12 @@ typedef struct SERIALIZABLEXACT
SHM_QUEUE finishedLink; /* list link in
* FinishedSerializableTransactions */
LWLock predicateLockListLock; /* protects predicateLocks in parallel
* mode */
/*
* perXactPredicateListLock is only used in parallel queries: it protects
* this SERIALIZABLEXACT's predicate lock list against other workers of
* the same session.
*/
LWLock perXactPredicateListLock;
/*
* for r/o transactions: list of concurrent r/w transactions that we could