/// <summary>
/// Initializes a new instance of the BlockCacheStream class.
/// </summary>
/// <param name="toWrap">The stream to wrap.</param>
/// <param name="ownership">Whether to assume ownership of <c>toWrap</c>.</param>
/// <param name="settings">The cache settings.</param>
public BlockCacheStream(SparseStream toWrap, Ownership ownership, BlockCacheSettings settings)
{
if (!toWrap.CanRead)
{
throw new ArgumentException("The wrapped stream does not support reading", nameof(toWrap));
}
if (!toWrap.CanSeek)
{
throw new ArgumentException("The wrapped stream does not support seeking", nameof(toWrap));
}
_wrappedStream = toWrap;
_ownWrapped = ownership;
_settings = new BlockCacheSettings(settings);
if (_settings.OptimumReadSize % _settings.BlockSize != 0)
{
throw new ArgumentException("Invalid settings, OptimumReadSize must be a multiple of BlockSize",
nameof(settings));
}
_readBuffer = new byte[_settings.OptimumReadSize];
_blocksInReadBuffer = _settings.OptimumReadSize / _settings.BlockSize;
int totalBlocks = (int)(_settings.ReadCacheSize / _settings.BlockSize);
_cache = new BlockCache <Block>(_settings.BlockSize, totalBlocks);
_stats = new BlockCacheStatistics();
_stats.FreeReadBlocks = totalBlocks;
}
/// <summary>
/// Creates a new instance.
/// </summary>
/// <param name="toWrap">The stream to wrap</param>
/// <param name="ownership">Whether to assume ownership of <c>toWrap</c></param>
/// <param name="settings">The cache settings</param>
public BlockCacheStream(SparseStream toWrap, Ownership ownership, BlockCacheSettings settings)
{
if (!toWrap.CanRead)
{
throw new ArgumentException("The wrapped stream does not support reading", "toWrap");
}
if (!toWrap.CanSeek)
{
throw new ArgumentException("The wrapped stream does not support seeking", "toWrap");
}
_wrappedStream = toWrap;
_ownWrapped = ownership;
_settings = new BlockCacheSettings(settings);
if (_settings.OptimumReadSize % _settings.BlockSize != 0)
{
throw new ArgumentException("Invalid settings, OptimumReadSize must be a multiple of BlockSize", "settings");
}
_readBuffer = new byte[_settings.OptimumReadSize];
_blocksInReadBuffer = _settings.OptimumReadSize / _settings.BlockSize;
_totalBlocks = (int)(_settings.ReadCacheSize / _settings.BlockSize);
_stats = new BlockCacheStatistics();
_stats.FreeReadBlocks = _totalBlocks;
_blocks = new Dictionary <long, CacheBlock>();
_lru = new LinkedList <CacheBlock>();
_freeBlocks = new List <CacheBlock>(_totalBlocks);
}
/// <summary>
/// Initializes a new instance of the BlockCacheStream class.
/// </summary>
/// <param name="toWrap">The stream to wrap.</param>
/// <param name="ownership">Whether to assume ownership of <c>toWrap</c>.</param>
/// <param name="settings">The cache settings.</param>
public BlockCacheStream(SparseStream toWrap, Ownership ownership, BlockCacheSettings settings)
{
if (!toWrap.CanRead)
{
throw new ArgumentException("The wrapped stream does not support reading", "toWrap");
}
if (!toWrap.CanSeek)
{
throw new ArgumentException("The wrapped stream does not support seeking", "toWrap");
}
_wrappedStream = toWrap;
_ownWrapped = ownership;
_settings = new BlockCacheSettings(settings);
if (_settings.OptimumReadSize % _settings.BlockSize != 0)
{
throw new ArgumentException("Invalid settings, OptimumReadSize must be a multiple of BlockSize", "settings");
}
_readBuffer = new byte[_settings.OptimumReadSize];
_blocksInReadBuffer = _settings.OptimumReadSize / _settings.BlockSize;
int totalBlocks = (int)(_settings.ReadCacheSize / _settings.BlockSize);
_cache = new BlockCache<Block>(_settings.BlockSize, totalBlocks);
_stats = new BlockCacheStatistics();
_stats.FreeReadBlocks = totalBlocks;
}