/// <summary>
/// Writes text from <see cref="queue"/> into the file.
/// </summary>
private void Write(string fileName, long fileSize)
{
var spin = new SpinWait();
var starvation = Stopwatch.StartNew();
using (var stream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write))
{
do
{
// until queue is not empty
while (queue.TryDequeue(out string text))
{
if (stream.Length + text.Length >= fileSize)
{
// need to replace last '\r\n' if it is the last one part
string replace = new StringRandomizer().CreateRandomString(2);
text = text.Substring(0, text.Length - 2) + replace;
stream.Write(Encoding.UTF8.GetBytes(text));
return;
}
stream.Write(Encoding.UTF8.GetBytes(text));
starvation.Restart();
}
// give to another threads processor quants
spin.SpinOnce();
// small waiting if any object has not in queue yet
} while (starvation.ElapsedMilliseconds < 300);
}
}
/// <summary>
/// Creates the file with specified size.
/// Do not use any lock to increase performance
/// </summary>
public void CreateFile(string fileName, long fileSize)
{
DeleteFileIfExists(fileName);
long totalSize = 0;
for (var i = 0; i < Environment.ProcessorCount - 1; i++)
{
Task.Run(() =>
{
var randomizer = new StringRandomizer();
while (totalSize < fileSize)
{
queue.Enqueue(randomizer.GetString(Settings.BatchGenerationSize, Settings.RepeatCount));
totalSize += Settings.BatchGenerationSize;
}
});
}
Write(fileName, fileSize);
}
