db-4.7.25.NC/lock/lock_deadlock.c

120 	DB_LOCKREGION *region;
146 	region = lt->reginfo.primary;
149 	if (region->need_dd == 0 &&
150 	     (!timespecisset(&region->next_timeout) ||
151 	     !__lock_expired(env, &now, &region->next_timeout))) {
154 	if (region->need_dd == 0)
158 	region->need_dd = 0;
163 	lock_max = region->stat.st_cur_maxid;
191 	 * We need the cur_maxid from the txn region as well.  In order
193 	 * regions, we simply unlock the lock region and then lock the
194 	 * txn region.  This introduces a small window during which the
323 				region->need_dd = 1;
385 	DB_LOCKREGION *region;
396 	region = lt->reginfo.primary;
408 	LOCK_SYSTEM_LOCK(lt, region);
410 skip:		LOCK_DD(env, region);
411 		op = SH_TAILQ_FIRST(&region->dd_objs, __db_lockobj);
415 			UNLOCK_DD(env, region);
416 			OBJECT_LOCK_NDX(lt, region, indx);
418 				OBJECT_UNLOCK(lt, region, indx);
441 			LOCK_DD(env, region);
443 			OBJECT_UNLOCK(lt, region, indx);
445 		UNLOCK_DD(env, region);
446 		LOCK_SYSTEM_UNLOCK(lt, region);
451 	 * Allocate after locking the region
454 	LOCK_LOCKERS(env, region);
455 	count = region->stat.st_nlockers;
457 		UNLOCK_LOCKERS(env, region);
470 		UNLOCK_LOCKERS(env, region);
476 		UNLOCK_LOCKERS(env, region);
483 		UNLOCK_LOCKERS(env, region);
493 	SH_TAILQ_FOREACH(lip, &region->lockers, ulinks, __db_locker) {
529 	LOCK_DD(env, region);
530 	op = SH_TAILQ_FIRST(&region->dd_objs, __db_lockobj);
534 		UNLOCK_DD(env, region);
536 		OBJECT_LOCK_NDX(lt, region, indx);
538 			OBJECT_UNLOCK(lt, region, indx);
655 		LOCK_DD(env, region);
657 		OBJECT_UNLOCK(lt, region, indx);
659 	UNLOCK_DD(env, region);
694 				OBJECT_LOCK_NDX(lt, region, ndx);
698 					OBJECT_UNLOCK(lt, region, ndx);
707 					OBJECT_UNLOCK(lt, region, ndx);
717 			OBJECT_LOCK_NDX(lt, region, ndx);
720 				OBJECT_UNLOCK(lt, region, ndx);
734 			OBJECT_UNLOCK(lt, region, ndx);
739 	UNLOCK_LOCKERS(env, region);
740 	LOCK_SYSTEM_UNLOCK(lt, region);
751 done:	if (timespecisset(&region->next_timeout))
752 		region->next_timeout = min_timeout;
831 	DB_LOCKREGION *region;
838 	region = lt->reginfo.primary;
842 	LOCK_SYSTEM_LOCK(lt, region);
843 	LOCK_LOCKERS(env, region);
863 	OBJECT_LOCK_NDX(lt, region, info->last_ndx);
887 		LOCK_DD(env, region);
888 		SH_TAILQ_REMOVE(&region->dd_objs,
890 		UNLOCK_DD(env, region);
895 	STAT(region->stat.st_ndeadlocks++);
896 done:	OBJECT_UNLOCK(lt, region, info->last_ndx);
898 out:	UNLOCK_LOCKERS(env, region);
899 	LOCK_SYSTEM_UNLOCK(lt, region);