public long?TryAllocateFromFreeSpace(LowLevelTransaction tx, int num)
{
if (tx.RootObjects == null)
{
return(null);
}
if (_disableStatus.DisableCount > 0)
{
return(null);
}
if (_guard.IsProcessingFixedSizeTree)
{
return(null);
}
using (_guard.Enter(tx))
{
var freeSpaceTree = GetFreeSpaceTree(tx);
if (freeSpaceTree.NumberOfEntries == 0)
{
return(null);
}
using (var it = freeSpaceTree.Iterate())
{
if (it.Seek(0) == false)
{
return(null);
}
if (num < NumberOfPagesInSection)
{
return(TryFindSmallValue(tx, freeSpaceTree, it, num));
}
return(TryFindLargeValue(tx, freeSpaceTree, it, num));
}
}
}
public long?TryAllocateFromFreeSpace(Transaction tx, int num)
{
if (tx.State.FreeSpaceRoot == null)
{
return(null); // initial setup
}
if (tx.FreeSpaceRoot.State.EntriesCount == 0)
{
return(null);
}
if (_disableStatus.DisableCount > 0)
{
return(null);
}
if (_guard.IsEntered)
{
return(null);
}
using (_guard.Enter(tx))
{
using (var it = tx.FreeSpaceRoot.Iterate())
{
if (it.Seek(Slice.BeforeAllKeys) == false)
{
return(null);
}
if (num < NumberOfPagesInSection)
{
return(TryFindSmallValue(tx, it, num));
}
return(TryFindLargeValue(tx, it, num));
}
}
}
