private void MoveMemoryToQueue()
{
using (memoryLocker.Using())
{
streamsToWrite.Enqueue(fileBlock, 0L);
}
if (streamsAvailable.Count == 0)
{
fileBlock = new FileBlock(fileHeader.blockSize);
}
else
{
using (memoryLocker.Using())
{
streamsAvailable.Dequeue(out fileBlock);
}
}
}
private unsafe void CreateFileForWriting()
{
fs = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.Read, 1024, FileOptions.WriteThrough);
log.Debug("OpenFileForWriting()");
fileHeader.blockHeader.version = 1;
fileHeader.blockHeader.type = BlockType.FileHeader;
fileHeader.blockSize = 1024 * 8;
fileHeader.utcTimeStamp = Factory.Parallel.UtcNow.Internal;
fileHeader.SetChecksum();
var headerBytes = new byte[fileHeader.blockSize];
fixed(byte *bptr = headerBytes)
{
*((TickFileHeader *)bptr) = fileHeader;
}
fs.Write(headerBytes, 0, fileHeader.blockSize);
fileBlock = new FileBlock(fileHeader.blockSize);
}
private unsafe void OpenFileForReading()
{
for (int retry = 0; retry < 3; retry++)
{
try
{
if (!quietMode)
{
LogInfo("Reading from file: " + fileName);
}
Directory.CreateDirectory(Path.GetDirectoryName(fileName));
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
var headerBytes = new byte[sizeof(TickFileHeader)];
var headerSize = sizeof(TickFileHeader);
var readBytes = fs.Read(headerBytes, 0, headerSize);
if (readBytes != headerSize)
{
throw new InvalidOperationException("Number of header bytes " + readBytes + " differs from size of the header " + headerSize);
}
fixed(byte *headerPtr = headerBytes)
{
fileHeader = *((TickFileHeader *)headerPtr);
}
if (!fileHeader.VerifyChecksum())
{
throw new InvalidOperationException("Checksum failed for file header.");
}
// Read the entire header block including all padding.
fs.Seek(fileHeader.blockSize, SeekOrigin.Begin);
// Verify the version number.
switch (fileHeader.blockHeader.version)
{
case 1:
break;
default:
throw new InvalidOperationException("Unrecognized tick file version " + fileHeader.blockHeader.version);
}
if (!quietMode || debug)
{
if (debug)
{
log.Debug("Starting to read data.");
}
}
fileBlock = new FileBlock(fileHeader.blockSize);
readFileStopwatch = new Stopwatch();
readFileStopwatch.Start();
break;
}
catch (InvalidOperationException)
{
throw;
}
catch (Exception e)
{
if (e is CollectionTerminatedException)
{
log.Warn("Reader queue was terminated.");
}
else if (e is ThreadAbortException)
{
//
}
else if (e is FileNotFoundException)
{
log.Error("ERROR: " + e.Message);
}
else
{
log.Error("ERROR: " + e);
Factory.Parallel.Sleep(1000);
}
}
}
}
