*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.192 2010/01/28 10:05:37 sriggs Exp $
+ * $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.193 2010/01/29 19:45:12 sriggs Exp $
*
* NOTES
* A lock table is a shared memory hash table. When
VirtualTransactionId *
GetLockConflicts(const LOCKTAG *locktag, LOCKMODE lockmode)
{
- static VirtualTransactionId *vxids = NULL;
+ static VirtualTransactionId *vxids;
LOCKMETHODID lockmethodid = locktag->locktag_lockmethodid;
LockMethod lockMethodTable;
LOCK *lock;
/*
* Allocate memory to store results, and fill with InvalidVXID. We only
* need enough space for MaxBackends + a terminator, since prepared xacts
- * don't count.
+ * don't count. InHotStandby allocate once in TopMemoryContext.
*/
- if (!InHotStandby)
- vxids = (VirtualTransactionId *)
- palloc0(sizeof(VirtualTransactionId) * (MaxBackends + 1));
- else
+ if (InHotStandby)
{
if (vxids == NULL)
- {
vxids = (VirtualTransactionId *)
- malloc(sizeof(VirtualTransactionId) * (MaxBackends + 1));
- if (vxids == NULL)
- ereport(ERROR,
- (errcode(ERRCODE_OUT_OF_MEMORY),
- errmsg("out of memory")));
-
- }
+ MemoryContextAlloc(TopMemoryContext,
+ sizeof(VirtualTransactionId) * (MaxBackends + 1));
}
+ else
+ vxids = (VirtualTransactionId *)
+ palloc0(sizeof(VirtualTransactionId) * (MaxBackends + 1));
/*
* Look up the lock object matching the tag.