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Tweak palloc/repalloc to allow zero bytes to be requested, as per recent

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proposal.  Eliminate several dozen now-unnecessary hacks to avoid palloc(0).
(It's likely there are more that I didn't find.)
This commit is contained in:
Tom Lane
2004-06-05 19:48:09 +00:00
parent 24a1e20f14
commit c3a153afed
19 changed files with 113 additions and 113 deletions
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7
src/backend/storage/lmgr/deadlock.c
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@@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/deadlock.c,v 1.27 2003/12/01 21:59:25 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/lmgr/deadlock.c,v 1.28 2004/06/05 19:48:08 tgl Exp $
*
* Interface:
*
@@ -147,11 +147,10 @@ InitDeadLockChecking(void)
* We need to consider rearranging at most MaxBackends/2 wait queues
* (since it takes at least two waiters in a queue to create a soft
* edge), and the expanded form of the wait queues can't involve more
* than MaxBackends total waiters. (But avoid palloc(0) if
* MaxBackends = 1.)
* than MaxBackends total waiters.
*/
waitOrders = (WAIT_ORDER *)
palloc(((MaxBackends + 1) / 2) * sizeof(WAIT_ORDER));
palloc((MaxBackends / 2) * sizeof(WAIT_ORDER));
waitOrderProcs = (PGPROC **) palloc(MaxBackends * sizeof(PGPROC *));
/*