示例#1
0
    async Task <int> Read(byte[] buffer, int offset, int count, bool async, CancellationToken cancellationToken = default)
    {
        if (buffer == null)
        {
            throw new ArgumentNullException(nameof(buffer));
        }
        if (offset < 0)
        {
            throw new ArgumentOutOfRangeException(nameof(offset));
        }
        if (count < 0)
        {
            throw new ArgumentOutOfRangeException(nameof(count));
        }
        if (buffer.Length - offset < count)
        {
            throw new ArgumentException("Invalid offset or count for this buffer");
        }

        CheckDisposed();

        var chunkCount = Math.Min(count, _manager.MaxTransferBlockSize);
        var read       = 0;

        while (read < count)
        {
            var bytesRead = await _manager.ExecuteFunctionGetBytes(
                "loread", buffer, offset + read, count - read, async, cancellationToken, _fd, chunkCount);

            _pos += bytesRead;
            read += bytesRead;
            if (bytesRead < chunkCount)
            {
                return(read);
            }
        }
        return(read);
    }