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Commit74d0994

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committed
Measure WaitLatch's timeout parameter in milliseconds, not microseconds.
The original definition had the problem that timeouts exceeding about 2100seconds couldn't be specified on 32-bit machines. Milliseconds seem likesufficient resolution, and finer grain than that would be fantasy anywayon many platforms.Back-patch to 9.1 so that this aspect of the latch API won't change between9.1 and later releases.Peter Geoghegan
1 parent6760a4d commit74d0994

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5 files changed

+7
-7
lines changed

5 files changed

+7
-7
lines changed

‎src/backend/access/transam/xlog.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -10161,7 +10161,7 @@ XLogPageRead(XLogRecPtr *RecPtr, int emode, bool fetching_ckpt,
1016110161
/*
1016210162
* Wait for more WAL to arrive, or timeout to be reached
1016310163
*/
10164-
WaitLatch(&XLogCtl->recoveryWakeupLatch,5000000L);
10164+
WaitLatch(&XLogCtl->recoveryWakeupLatch,5000L);
1016510165
ResetLatch(&XLogCtl->recoveryWakeupLatch);
1016610166
}
1016710167
else

‎src/backend/port/unix_latch.c‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -134,7 +134,7 @@ DisownLatch(volatile Latch *latch)
134134
* Wait for given latch to be set or until timeout is exceeded.
135135
* If the latch is already set, the function returns immediately.
136136
*
137-
* The 'timeout' is given inmicroseconds, and -1 means wait forever.
137+
* The 'timeout' is given inmilliseconds, and -1 means wait forever.
138138
* On some platforms, signals cause the timeout to be restarted, so beware
139139
* that the function can sleep for several times longer than the specified
140140
* timeout.
@@ -173,8 +173,8 @@ WaitLatchOrSocket(volatile Latch *latch, pgsocket sock, bool forRead,
173173
/* Initialize timeout */
174174
if (timeout >=0)
175175
{
176-
tv.tv_sec=timeout /1000000L;
177-
tv.tv_usec=timeout %1000000L;
176+
tv.tv_sec=timeout /1000L;
177+
tv.tv_usec=(timeout %1000L)*1000L;
178178
tvp=&tv;
179179
}
180180

‎src/backend/port/win32_latch.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -137,7 +137,7 @@ WaitLatchOrSocket(volatile Latch *latch, pgsocket sock, bool forRead,
137137
}
138138

139139
rc=WaitForMultipleObjects(numevents,events, FALSE,
140-
(timeout >=0) ?(timeout /1000) :INFINITE);
140+
(timeout >=0) ?timeout :INFINITE);
141141
if (rc==WAIT_FAILED)
142142
elog(ERROR,"WaitForMultipleObjects() failed: error code %d", (int)GetLastError());
143143
elseif (rc==WAIT_TIMEOUT)

‎src/backend/replication/syncrep.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -251,7 +251,7 @@ SyncRepWaitForLSN(XLogRecPtr XactCommitLSN)
251251
* cancel/die signal or postmaster death regularly while waiting. Note
252252
* that timeout here does not necessarily release from loop.
253253
*/
254-
WaitLatch(&MyProc->waitLatch,60000000L);
254+
WaitLatch(&MyProc->waitLatch,60000L);
255255
}
256256

257257
/*

‎src/backend/replication/walsender.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -807,7 +807,7 @@ WalSndLoop(void)
807807
/* Sleep */
808808
WaitLatchOrSocket(&MyWalSnd->latch,MyProcPort->sock,
809809
true,pq_is_send_pending(),
810-
sleeptime*1000L);
810+
sleeptime);
811811

812812
/* Check for replication timeout */
813813
if (replication_timeout>0&&

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