예제 #1
0
파일: LockManager.cs 프로젝트: zuvys/Vicuna
        /// <summary>
        /// is other's transaction has held the table's lock and conflict with the ctx-lock
        /// </summary>
        /// <param name="ctx"></param>
        /// <returns></returns>
        private bool IsOthersHeldOrWaitConflictTabLock(Transaction tx, TableIndex index, LockFlags flags, LockEntry endEntry = null)
        {
            var locks = TabLocks.GetValueOrDefault(index);

            if (locks == null)
            {
                return(false);
            }

            for (var node = locks.First; node != null; node = node.Next)
            {
                var entry = node.Value;
                if (entry == endEntry)
                {
                    break;
                }

                if (entry.Transaction == tx)
                {
                    continue;
                }

                if (entry.IsExclusive || flags.IsExclusive())
                {
                    return(true);
                }
            }

            return(false);
        }
예제 #2
0
파일: LockManager.cs 프로젝트: zuvys/Vicuna
        /// <summary>
        /// is other's transaction has held the recrod's lock and conflict with the ctx-lock
        /// </summary>
        /// <param name="ctx"></param>
        /// <returns></returns>
        private bool IsOthersHeldOrWaitConflictRecLock(Transaction tx, PagePosition page, int slot, LockFlags flags, LockEntry endEntry = null)
        {
            var locks = RecLocks.GetValueOrDefault(page);

            if (locks == null)
            {
                return(false);
            }

            for (var node = locks.First; node != null; node = node.Next)
            {
                var entry = node.Value;
                if (entry == endEntry)
                {
                    break;
                }

                if (entry.Transaction == tx ||
                    entry.GetBit(slot) == 0)
                {
                    continue;
                }

                if (entry.IsExclusive || flags.IsExclusive())
                {
                    return(true);
                }
            }

            return(false);
        }