/// <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);
}
/// <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);
}
