void WriterNodeMove()
{
if (Node.Next == null) //next block is null
{
if (ByteBlockBuffer.LinkedList.First != ByteBlockBuffer.Reader.Node) //give priority to reuse block from beginning
{
Node = ByteBlockBuffer.LinkedList.First;
}
else //create new block
{
ByteBlockBuffer.LinkedList.AddAfter(Node, ByteBlockBuffer.CreateBlock());
Node = Node.Next;
}
}
else //next block is exist
{
if (Node.Next == ByteBlockBuffer.Reader.Node) //all blocks are occupied, create a new one
{
ByteBlockBuffer.LinkedList.AddAfter(Node, ByteBlockBuffer.CreateBlock());
Node = Node.Next;
}
else //reuse block
{
Node = Node.Next;
}
}
}
/// <summary>
/// how many bytes you have read out
/// used to move postion
/// </summary>
/// <param name="length"></param>
public void MovePosition(int length)
{
lock (Locker)
{
Position += length;
if (Position > ByteBlockBuffer.Size)
{
throw new Exception("Reader position error");
}
if (ByteBlockBuffer.IsReaderAndWriterInSameNode())
{
if (Position > ByteBlockBuffer.Writer.Position)
{
throw new Exception(
"When in same node, Reader's position must not large than Writer's postion");
}
}
if (Position == ByteBlockBuffer.Size) //current block have already read finish
{
Position = 0;
ReaderNodeMove();
}
}
}
