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Code review for superuser_reserved_connections patch. Don't try to do

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database access outside a transaction; revert bogus performance improvement
in SIBackendInit(); improve comments; add documentation (this part courtesy
Neil Conway).
This commit is contained in:
Tom Lane
2002-11-21 06:36:08 +00:00
parent 02d83d7565
commit 8362be35e8
5 changed files with 90 additions and 63 deletions
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24
src/backend/storage/ipc/sinvaladt.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinvaladt.c,v 1.48 2002/08/29 21:02:12 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinvaladt.c,v 1.49 2002/11/21 06:36:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -92,13 +92,6 @@ SIBackendInit(SISeg *segP)
int index;
ProcState *stateP = NULL;
if (segP->freeBackends == 0)
{
/* out of procState slots */
MyBackendId = InvalidBackendId;
return 0;
}
/* Look for a free entry in the procState array */
for (index = 0; index < segP->lastBackend; index++)
{
@@ -111,9 +104,18 @@ SIBackendInit(SISeg *segP)
if (stateP == NULL)
{
stateP = &segP->procState[segP->lastBackend];
Assert(stateP->nextMsgNum < 0);
segP->lastBackend++;
if (segP->lastBackend < segP->maxBackends)
{
stateP = &segP->procState[segP->lastBackend];
Assert(stateP->nextMsgNum < 0);
segP->lastBackend++;
}
else
{
/* out of procState slots */
MyBackendId = InvalidBackendId;
return 0;
}
}
MyBackendId = (stateP - &segP->procState[0]) + 1;