internal DiskManager(EngineSettings settings, Factories factories, IPieceWriter?writer = null)
{
ReadLimiter = new RateLimiter();
ReadQueue = new Queue <BufferedIO> ();
WriteLimiter = new RateLimiter();
WriteQueue = new Queue <BufferedIO> ();
UpdateTimer = ValueStopwatch.StartNew();
Factories = factories ?? throw new ArgumentNullException(nameof(factories));
Settings = settings ?? throw new ArgumentNullException(nameof(settings));
writer ??= factories.CreatePieceWriter(settings.MaximumOpenFiles);
Cache = factories.CreateBlockCache(writer, settings.DiskCacheBytes, BufferPool);
Cache.ReadThroughCache += (o, e) => WriterReadMonitor.AddDelta(e.RequestLength);
Cache.WrittenThroughCache += (o, e) => WriterWriteMonitor.AddDelta(e.RequestLength);
IncrementalHashCache = new Cache <IncrementalHashData> (() => new IncrementalHashData());
}
