|
public abstract GetBlock ( |
||
| args | The block request that needs to be fulfilled by this IoSession. | |
| return | void | |
/// <summary>
/// Updates the local buffer data.
/// </summary>
/// <param name="isWriting">hints to the stream if write access is desired.</param>
public override void UpdateLocalBuffer(bool isWriting)
{
//If the block block is already looked up, skip this step.
if (isWriting && LastWrite - Current > 0 || !isWriting && LastRead - Current > 0) //RemainingWriteLength == (m_lastWrite - m_current) //RemainingReadLength = (m_lastRead - m_current)
{
return;
}
long position = FirstPosition + (Current - First);
m_args.Position = position;
m_args.IsWriting = isWriting;
PointerVersion++;
m_mainIoSession.GetBlock(m_args);
FirstPosition = m_args.FirstPosition;
First = (byte *)m_args.FirstPointer;
LastRead = First + m_args.Length;
Current = First + (position - FirstPosition);
LastPosition = FirstPosition + m_args.Length;
if (m_args.SupportsWriting)
{
LastWrite = LastRead;
}
else
{
LastWrite = First;
}
}
