static bool shutdown_locks(thread_db* tdbb, SSHORT flag)
{
/**************************************
*
* s h u t d o w n _ l o c k s
*
**************************************
*
* Functional description
* Release all attachment and database
* locks if database is quiet.
*
**************************************/
Database* dbb = tdbb->getDatabase();
/* Mark database and all active attachments as shutdown. */
dbb->dbb_ast_flags &= ~(DBB_shutdown | DBB_shutdown_single | DBB_shutdown_full);
switch (flag & isc_dpb_shut_mode_mask)
{
case isc_dpb_shut_normal:
break;
case isc_dpb_shut_multi:
dbb->dbb_ast_flags |= DBB_shutdown;
break;
case isc_dpb_shut_single:
dbb->dbb_ast_flags |= DBB_shutdown | DBB_shutdown_single;
break;
case isc_dpb_shut_full:
dbb->dbb_ast_flags |= DBB_shutdown | DBB_shutdown_full;
break;
default:
fb_assert(false);
}
Attachment* attachment;
for (attachment = dbb->dbb_attachments; attachment; attachment = attachment->att_next)
{
if (!(attachment->att_flags & ATT_shutdown_manager))
{
attachment->att_flags |= ATT_shutdown;
attachment->cancelExternalConnection(tdbb);
LCK_cancel_wait(attachment);
}
}
JRD_shutdown_attachments(dbb);
for (int retry = 0; retry < 10 && dbb->dbb_use_count; retry++)
{
// Let active database threads rundown
Database::Checkout dcoHolder(dbb);
THREAD_SLEEP(1 * 100);
}
if (dbb->dbb_use_count)
{
return false;
}
/* Since no attachment is actively running, release all
attachment-specfic locks while they're not looking. */
const Attachment* shut_attachment = NULL;
for (attachment = dbb->dbb_attachments; attachment; attachment = attachment->att_next)
{
if (attachment->att_flags & ATT_shutdown_manager)
{
shut_attachment = attachment;
continue;
}
if (attachment->att_id_lock)
LCK_release(tdbb, attachment->att_id_lock);
TRA_shutdown_attachment(tdbb, attachment);
}
/* Release database locks that are shared by all attachments.
These include relation and index existence locks, as well
as, relation interest and record locking locks for PC semantic
record locking. */
CMP_shutdown_database(tdbb);
/* If shutdown manager is here, leave enough database lock context
to run as a normal attachment. Otherwise, get rid of the rest
of the database locks.*/
if (!shut_attachment)
{
CCH_shutdown_database(dbb);
if (dbb->dbb_monitor_lock)
LCK_release(tdbb, dbb->dbb_monitor_lock);
if (dbb->dbb_shadow_lock)
LCK_release(tdbb, dbb->dbb_shadow_lock);
if (dbb->dbb_retaining_lock)
LCK_release(tdbb, dbb->dbb_retaining_lock);
if (dbb->dbb_lock)
LCK_release(tdbb, dbb->dbb_lock);
dbb->dbb_shared_counter.shutdown(tdbb);
dbb->dbb_backup_manager->shutdown(tdbb);
dbb->dbb_ast_flags |= DBB_shutdown_locks;
}
return true;
}
