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Rename two functions that wake up other processes

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Instead of talking about setting latches, which is a pretty low-level
mechanism, emphasize that they wake up other processes.

This is in preparation for replacing Latches with a new abstraction.
That's still work in progress, but this seems a little tidier anyway,
so let's get this refactoring out of the way already.

Discussion: https://www.postgresql.org/message-id/391abe21-413e-4d91-a650-b663af49500c%40iki.fi
This commit is contained in:
Heikki Linnakangas
2024-11-01 13:47:24 +02:00
parent a9c546a5a3
commit 368d8270c8
6 changed files with 8 additions and 8 deletions
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4
src/backend/access/transam/xlog.c
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@ -6178,7 +6178,7 @@ StartupXLOG(void)
* Wake up all waiters for replay LSN. They need to report an error that
* recovery was ended before reaching the target LSN.
*/
WaitLSNSetLatches(InvalidXLogRecPtr);
WaitLSNWakeup(InvalidXLogRecPtr);
/*
* Shutdown the recovery environment. This must occur after
@ -7303,7 +7303,7 @@ CreateCheckPoint(int flags)
* until after the above call that flushes the XLOG_CHECKPOINT_ONLINE
* record.
*/
SetWalSummarizerLatch();
WakeupWalSummarizer();
/*
* Let smgr do post-checkpoint cleanup (eg, deleting old files).

2
src/backend/access/transam/xlogrecovery.c
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@ -1837,7 +1837,7 @@ PerformWalRecovery(void)
if (waitLSNState &&
(XLogRecoveryCtl->lastReplayedEndRecPtr >=
pg_atomic_read_u64(&waitLSNState->minWaitedLSN)))
WaitLSNSetLatches(XLogRecoveryCtl->lastReplayedEndRecPtr);
WaitLSNWakeup(XLogRecoveryCtl->lastReplayedEndRecPtr);
/* Else, try to fetch the next WAL record */
record = ReadRecord(xlogprefetcher, LOG, false, replayTLI);

2
src/backend/access/transam/xlogwait.c
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@ -151,7 +151,7 @@ deleteLSNWaiter(void)
* and set latches for all waiters.
*/
void
WaitLSNSetLatches(XLogRecPtr currentLSN)
WaitLSNWakeup(XLogRecPtr currentLSN)
{
int i;
ProcNumber *wakeUpProcs;

4
src/backend/postmaster/walsummarizer.c
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@ -626,7 +626,7 @@ GetOldestUnsummarizedLSN(TimeLineID *tli, bool *lsn_is_exact)
}
/*
* Attempt to set the WAL summarizer's latch.
* Wake up the WAL summarizer process.
*
* This might not work, because there's no guarantee that the WAL summarizer
* process was successfully started, and it also might have started but
@ -634,7 +634,7 @@ GetOldestUnsummarizedLSN(TimeLineID *tli, bool *lsn_is_exact)
* latch set, but there's no guarantee.
*/
void
SetWalSummarizerLatch(void)
WakeupWalSummarizer(void)
{
ProcNumber pgprocno;

2
src/include/access/xlogwait.h
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@ -82,7 +82,7 @@ extern PGDLLIMPORT WaitLSNState *waitLSNState;
extern Size WaitLSNShmemSize(void);
extern void WaitLSNShmemInit(void);
extern void WaitLSNSetLatches(XLogRecPtr currentLSN);
extern void WaitLSNWakeup(XLogRecPtr currentLSN);
extern void WaitLSNCleanup(void);
extern WaitLSNResult WaitForLSNReplay(XLogRecPtr targetLSN, int64 timeout);

2
src/include/postmaster/walsummarizer.h
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@ -29,7 +29,7 @@ extern void GetWalSummarizerState(TimeLineID *summarized_tli,
int *summarizer_pid);
extern XLogRecPtr GetOldestUnsummarizedLSN(TimeLineID *tli,
bool *lsn_is_exact);
extern void SetWalSummarizerLatch(void);
extern void WakeupWalSummarizer(void);
extern void WaitForWalSummarization(XLogRecPtr lsn);
#endif