/*
* ResourceOwnerDelete
* Delete an owner object and its descendants.
*
* The caller must have already released all resources in the object tree.
*/
void
ResourceOwnerDelete(ResourceOwner owner)
{
/* We had better not be deleting CurrentResourceOwner ... */
Assert(owner != CurrentResourceOwner);
/* And it better not own any resources, either */
Assert(owner->nbuffers == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
Assert(owner->ncatrefs == 0);
Assert(owner->ncatlistrefs == 0);
Assert(owner->nrelrefs == 0);
Assert(owner->ndsms == 0);
Assert(owner->nplanrefs == 0);
Assert(owner->ntupdescs == 0);
Assert(owner->nsnapshots == 0);
Assert(owner->nfiles == 0);
/*
* Delete children. The recursive call will delink the child from me, so
* just iterate as long as there is a child.
*/
while (owner->firstchild != NULL)
ResourceOwnerDelete(owner->firstchild);
/*
* We delink the owner from its parent before deleting it, so that if
* there's an error we won't have deleted/busted owners still attached to
* the owner tree. Better a leak than a crash.
*/
ResourceOwnerNewParent(owner, NULL);
/* And free the object. */
if (owner->buffers)
pfree(owner->buffers);
if (owner->catrefs)
pfree(owner->catrefs);
if (owner->catlistrefs)
pfree(owner->catlistrefs);
if (owner->relrefs)
pfree(owner->relrefs);
if (owner->planrefs)
pfree(owner->planrefs);
if (owner->tupdescs)
pfree(owner->tupdescs);
if (owner->snapshots)
pfree(owner->snapshots);
if (owner->files)
pfree(owner->files);
if (owner->dsms)
pfree(owner->dsms);
pfree(owner);
}
/*
* Pre-subcommit processing for portals.
*
* Reassign the portals created in the current subtransaction to the parent
* subtransaction.
*/
void
AtSubCommit_Portals(SubTransactionId mySubid,
SubTransactionId parentSubid,
ResourceOwner parentXactOwner)
{
HASH_SEQ_STATUS status;
PortalHashEnt *hentry;
hash_seq_init(&status, PortalHashTable);
while ((hentry = (PortalHashEnt *) hash_seq_search(&status)) != NULL)
{
Portal portal = hentry->portal;
if (portal->createSubid == mySubid)
{
portal->createSubid = parentSubid;
if (portal->resowner)
ResourceOwnerNewParent(portal->resowner, parentXactOwner);
}
}
}
/*
* Subtransaction abort handling for portals.
*
* Deactivate portals created during the failed subtransaction.
* Note that per AtSubCommit_Portals, this will catch portals created
* in descendants of the subtransaction too.
*
* We don't destroy any portals here; that's done in AtSubCleanup_Portals.
*/
void
AtSubAbort_Portals(SubTransactionId mySubid,
SubTransactionId parentSubid,
ResourceOwner parentXactOwner)
{
HASH_SEQ_STATUS status;
PortalHashEnt *hentry;
hash_seq_init(&status, PortalHashTable);
while ((hentry = (PortalHashEnt *) hash_seq_search(&status)) != NULL)
{
Portal portal = hentry->portal;
if (portal->createSubid != mySubid)
continue;
/*
* Force any active portals of my own transaction into FAILED state.
* This is mostly to ensure that a portal running a FETCH will go
* FAILED if the underlying cursor fails. (Note we do NOT want to do
* this to upper-level portals, since they may be able to continue.)
*
* This is only needed to dodge the sanity check in PortalDrop.
*/
if (portal->status == PORTAL_ACTIVE)
portal->status = PORTAL_FAILED;
/*
* If the portal is READY then allow it to survive into the parent
* transaction; otherwise shut it down.
*
* Currently, we can't actually support that because the portal's
* query might refer to objects created or changed in the failed
* subtransaction, leading to crashes if execution is resumed. So,
* even READY portals are deleted. It would be nice to detect whether
* the query actually depends on any such object, instead.
*/
#ifdef NOT_USED
if (portal->status == PORTAL_READY)
{
portal->createSubid = parentSubid;
if (portal->resowner)
ResourceOwnerNewParent(portal->resowner, parentXactOwner);
}
else
#endif
{
/* let portalcmds.c clean up the state it knows about */
if (PointerIsValid(portal->cleanup))
{
(*portal->cleanup) (portal);
portal->cleanup = NULL;
}
/*
* Any resources belonging to the portal will be released in the
* upcoming transaction-wide cleanup; they will be gone before we
* run PortalDrop.
*/
portal->resowner = NULL;
}
}
}