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Avoid delaying postmaster shutdown by up to 10 seconds on platforms

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where signals do not terminate sleep() delays.
This commit is contained in:
Tom Lane 2004-02-12 20:07:26 +00:00
parent 4a1c29f87e
commit da99cce7cd
1 changed files with 18 additions and 2 deletions
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20
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.159 2004/02/12 15:06:56 wieck Exp $ * $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.160 2004/02/12 20:07:26 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -943,6 +943,7 @@ BufferBackgroundWriter(void)
for (;;) for (;;)
{ {
int n; int n;
long udelay;
/* /*
* Call BufferSync() with instructions to keep just the * Call BufferSync() with instructions to keep just the
@ -970,8 +971,23 @@ BufferBackgroundWriter(void)
/* /*
* Nap for the configured time or sleep for 10 seconds if * Nap for the configured time or sleep for 10 seconds if
* there was nothing to do at all. * there was nothing to do at all.
*
* On some platforms, signals won't interrupt the sleep. To ensure
* we respond reasonably promptly when the postmaster signals us,
* break down the sleep into 1-second increments, and check for
* interrupts after each nap.
*/ */
pg_usleep((n > 0) ? BgWriterDelay * 1000L : 10000000L); udelay = ((n > 0) ? BgWriterDelay : 10000) * 1000L;
while (udelay > 1000000L)
{
pg_usleep(1000000L);
udelay -= 1000000L;
if (InterruptPending)
return;
}
pg_usleep(udelay);
if (InterruptPending)
return;
} }
} }