/// <summary>
/// create a new table-lock
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
private LockEntry CreateTabLock(ref LockContext ctx)
{
if (!TabLocks.TryGetValue(ctx.Index, out var list))
{
list = new LinkedList <LockEntry>();
TabLocks[ctx.Index] = list;;
}
var tx = ctx.Transaction;
var entry = new LockEntry(ctx.Page, ctx.Flags, ctx.RecordCount);
if (entry.IsWaiting)
{
tx.WaitLock = entry;
}
list.AddLast(entry);
tx.Locks.AddLast(entry);
entry.GNode = list.Last;
entry.TNode = tx.Locks.Last;
entry.Index = ctx.Index;
entry.Transaction = ctx.Transaction;
entry.Thread = Thread.CurrentThread.ManagedThreadId;
return(entry);
}
internal LockEntry FindFirstTabLockEntry(TableIndex index)
{
return(TabLocks.TryGetValue(index, out var list) ? list.First.Value : null);
}