private List<int> DiffMethod(ThreadSafeFileLineQueue queueA, ThreadSafeFileLineQueue queueB)
{
var diffIndexes = new List<int>();
int lineIndex = 0;
string lineA, lineB;
while ((lineA = queueA.Dequeue()) != null & (lineB = queueB.Dequeue()) != null)
{
if (lineA != lineB)
{
diffIndexes.Add(lineIndex);
}
lineIndex++;
}
while (lineA != null)
{
diffIndexes.Add(lineIndex++);
lineA = queueA.Dequeue();
}
while (lineB != null)
{
diffIndexes.Add(lineIndex++);
lineB = queueB.Dequeue();
}
return diffIndexes;
}
private void ReadFileMethod(string fileName, ThreadSafeFileLineQueue queue)
{
using (var fileStreamA = new StreamReader(File.OpenRead(fileName)))
{
while (!fileStreamA.EndOfStream)
{
queue.Enqueue(fileStreamA.ReadLine());
}
queue.FinishAdding();
}
}
public List<int> FindDiff(string fileNameA, string fileNameB)
{
_stopwatch.Start();
var queueA = new ThreadSafeFileLineQueue();
var queueB = new ThreadSafeFileLineQueue();
var taskA = Task.Run(() => ReadFileMethod(fileNameA, queueA));
var taskB = Task.Run(() => ReadFileMethod(fileNameB, queueB));
var taskC = Task.Run(() => DiffMethod(queueA, queueB));
Task.WaitAll(taskA, taskB, taskC);
_stopwatch.Stop();
return taskC.Result;
}