private int AllocateBlockId()
{
var freeBlock = FreeBlocks.Where(b => !InitialFreeBlocks.Contains(b)).FirstOrDefault();
if (freeBlock == 0)
{
freeBlock = FreeBlocks.FirstOrDefault();
}
if (freeBlock == 0)
{
freeBlock = TailBlockId++;
}
FreeBlocks.Remove(freeBlock);
AllocatedBlocks.Add(freeBlock);
return(freeBlock);
}
public void FreeBlock(int blockId)
{
VerifyValidDataBlock(blockId);
IsChanged = true;
var chainedBlock = _blocks[blockId];
if (AllocatedBlocks.Contains(blockId) || InitialFreeBlocks.Contains(blockId))
{
foreach (var id in chainedBlock.BlockIds)
{
FreeBlocks.Add(id);
}
}
else
{
foreach (var id in chainedBlock.BlockIds)
{
GarbageBlocks.Add(id);
}
}
_blocks.Remove(blockId);
}
