Esempio n. 1
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        /// <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;
        }
        /// <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;
        }