/// <summary>
/// Executes the Filter task over the data provided by the input pipe
/// and writes the result to the output pipe.
/// Is est, executes the operation: OutputPipe.Write(FilterTask(InputPipe.Read()));
/// </summary>
public virtual void FilterNext()
{
Monitor.Enter(oLock);
outputPipe.Write(FilterTask(inputPipe.Read()));
Monitor.PulseAll(oLock);
Monitor.Exit(oLock);
}