/// <summary>
/// Complete the change by copying the temporary buffer to the actual parity
/// </summary>
public void Save()
{
DateTime start = DateTime.Now;
byte[] data = new byte[Parity.BLOCK_SIZE];
try {
saveBlock = startBlock;
UInt32 endBlock = block;
if (mmfStream != null)
{
mmfStream.Seek(0, SeekOrigin.Begin); // return MMF stream to its start (it may still be at the end if on-disk temp was never used)
while (saveBlock < endBlock && saveBlock < lastMMFBlock)
{
mmfStream.Read(data, 0, Parity.BLOCK_SIZE);
parity.WriteBlock(saveBlock, data);
saveBlock++;
}
FreeMMF();
}
if (tempFileStream != null)
{
#if DEBUG
LogFile.Log("Flushing MMF parity took {0} seconds", (DateTime.Now - start).TotalSeconds);
#endif
tempFileStream.Seek(0, SeekOrigin.Begin);
while (saveBlock < endBlock)
{
tempFileStream.Read(data, 0, Parity.BLOCK_SIZE);
parity.WriteBlock(saveBlock, data);
saveBlock++;
}
}
}
catch (Exception e) {
LogFile.Log("Fatal error in ParityChange.Save(): " + e.Message);
throw new Exception("A fatal error occurred (" + e.Message + ") when writing to parity. Parity data may be damaged.", e);
}
}
public bool Write(UInt32 block)
{
return(parity.WriteBlock(block, data));
}