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MXS-1929: Close listener DCBs

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When a service is freed, it will free all of its listeners causing their
respective DCBs to be closed. This requires that listeners can be removed
from the worker DCB list.
This commit is contained in:
Markus Mäkelä
2018-07-18 09:41:14 +03:00
parent b93eaf6fb2
commit 23d944b82e
3 changed files with 68 additions and 38 deletions
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73
server/core/dcb.cc
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@ -2804,49 +2804,46 @@ static void dcb_add_to_list(DCB *dcb)
*/
static void dcb_remove_from_list(DCB *dcb)
{
if (dcb->dcb_role != DCB_ROLE_SERVICE_LISTENER)
int id = static_cast<RoutingWorker*>(dcb->poll.owner)->id();
if (dcb == this_unit.all_dcbs[id])
{
int id = static_cast<RoutingWorker*>(dcb->poll.owner)->id();
DCB *tail = this_unit.all_dcbs[id]->thread.tail;
this_unit.all_dcbs[id] = this_unit.all_dcbs[id]->thread.next;
if (dcb == this_unit.all_dcbs[id])
if (this_unit.all_dcbs[id])
{
DCB *tail = this_unit.all_dcbs[id]->thread.tail;
this_unit.all_dcbs[id] = this_unit.all_dcbs[id]->thread.next;
if (this_unit.all_dcbs[id])
{
this_unit.all_dcbs[id]->thread.tail = tail;
}
this_unit.all_dcbs[id]->thread.tail = tail;
}
else
{
// If the creation of the DCB failed, it will not have been added
// to the list at all. And if it happened to be the first DCB to be
// created, then `prev` is NULL at this point.
DCB *prev = this_unit.all_dcbs[id];
DCB *current = prev ? prev->thread.next : NULL;
while (current)
{
if (current == dcb)
{
if (current == this_unit.all_dcbs[id]->thread.tail)
{
this_unit.all_dcbs[id]->thread.tail = prev;
}
prev->thread.next = current->thread.next;
break;
}
prev = current;
current = current->thread.next;
}
}
/** Reset the next and tail pointers so that if this DCB is added to the list
* again, it will be in a clean state. */
dcb->thread.next = NULL;
dcb->thread.tail = NULL;
}
else
{
// If the creation of the DCB failed, it will not have been added
// to the list at all. And if it happened to be the first DCB to be
// created, then `prev` is NULL at this point.
DCB *prev = this_unit.all_dcbs[id];
DCB *current = prev ? prev->thread.next : NULL;
while (current)
{
if (current == dcb)
{
if (current == this_unit.all_dcbs[id]->thread.tail)
{
this_unit.all_dcbs[id]->thread.tail = prev;
}
prev->thread.next = current->thread.next;
break;
}
prev = current;
current = current->thread.next;
}
}
/** Reset the next and tail pointers so that if this DCB is added to the list
* again, it will be in a clean state. */
dcb->thread.next = NULL;
dcb->thread.tail = NULL;
}
/**