private void ReadChunks(IntPtr affinityMask)
{
if (_filesQueue != null)
{
try
{
TrySetAffinityForCurrentThread(affinityMask);
while (_filesQueue.Count != 0 && !_forceStop)
{
if (_sortedChunkList.Count >= _maxQueueCapacity)
{
// if _chunkQueue is full, wait and pass to the next iteration
Thread.Sleep(200);
continue;
}
if (_filesQueue.TryDequeue(out Tuple <int, string> chunkFile))
{
var zipedFile = Path.Combine(_baseDir, chunkFile.Item2);
using (MemoryStream memStream = new MemoryStream())
using (Stream zippedFileStream = File.OpenRead(zipedFile))
using (Stream csStream = new GZipStream(zippedFileStream, CompressionMode.Decompress))
{
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = csStream.Read(buffer, 0, buffer.Length)) > 0)
{
memStream.Write(buffer, 0, bytesRead);
}
CompressionChunk chunk = new CompressionChunk()
{
Number = chunkFile.Item1,
Data = memStream.ToArray()
};
lock (_sortedChunkListLocker)
{
_sortedChunkList.Add(chunk.Number, chunk);
}
}
}
}
}
catch (Exception ex)
{
HandleError($"Error accured in ReadChunks, thread name:{Thread.CurrentThread.Name} thread id:{Thread.CurrentThread.ManagedThreadId}", ex);
}
}
}
private void ProduceChunks(IntPtr affinityMask)
{
var inputFilePath = Path.Combine(_baseDir, _inputFile);
try
{
TrySetAffinityForCurrentThread(affinityMask);
using (FileStream sourceFileSream = new FileStream(inputFilePath, FileMode.Open))
{
int count = 1;
byte[] buffer = new byte[chunkSize];
int bytesRead;
while ((bytesRead = sourceFileSream.Read(buffer, 0, buffer.Length)) > 0 && !_forceStop)
{
byte[] data = new byte[bytesRead];
Buffer.BlockCopy(buffer, 0, data, 0, bytesRead);
CompressionChunk chunk = new CompressionChunk()
{
Number = count,
Data = data
};
_chunkQueue.Enqueue(chunk);
count++;
if (_chunkQueue.Count >= _maxQueueCapacity)
{
// if _chunkQueue is full, wait to slow down a little.
Thread.Sleep(200);
continue;
}
}
}
}
catch (Exception ex)
{
HandleError($"Error accured in ProduceChunks thread name:{Thread.CurrentThread.Name} thread id:{Thread.CurrentThread.ManagedThreadId}", ex);
}
_reading = false;
}
private void WriteUnzipedChunks(IntPtr affinityMask)
{
// todo: first chunk number must be past as parameter or taken from class member.
int count = 1;
var outputFilePath = Path.Combine(_baseDir, _outputFile);
CompressionChunk chunk = null;
try
{
TrySetAffinityForCurrentThread(affinityMask);
using (FileStream destFileSream = new FileStream(outputFilePath, FileMode.Create))
{
while ((_reading || _sortedChunkList.Count > 0) && !_forceStop)
{
if (_sortedChunkList.Count > 0 && _sortedChunkList.ElementAt(0).Key == count)
{
lock (_sortedChunkListLocker)
{
// no need to check twice the key existance because there is only one writer.
chunk = _sortedChunkList.ElementAt(0).Value;
_sortedChunkList.RemoveAt(0);
}
destFileSream.Write(chunk.Data, 0, chunk.Data.Length);
count++;
}
else
{
// if list is stil or already empty, wait.
Thread.Sleep(100);
}
}
}
}
catch (Exception ex)
{
HandleError($"Error accured in WriteUnzipedChunks, thread name:{Thread.CurrentThread.Name} thread id:{Thread.CurrentThread.ManagedThreadId}", ex);
}
}
