| private GetBlockIndexValue ( uint blockIndex, int offset, BlockType blockType, uint blockBaseIndex ) : uint | ||
| blockIndex | uint | the index of the block to read |
| offset | int | the offset inside the block to use to determine the next index block |
| blockType | BlockType | the value 1-4 which tell what indirect block this is |
| blockBaseIndex | uint | the lowest virtual address that can be referenced from this indirect block |
| return | uint | |
private uint GetBlockIndexValue(uint blockIndex, int offset, BlockType blockType, uint blockBaseIndex)
{
DiskIoSession buffer = m_ioSessions.SourceIndex;
if (blockIndex == 0)
return 0;
//Skip the redundant read if this block is still cached.
if (!buffer.IsValid || buffer.BlockIndex != blockIndex)
{
buffer.Read(blockIndex, blockType, blockBaseIndex);
}
return *(uint*)(buffer.Pointer + (offset << 2));
}