public static T Clone <T>(T obj) where T : class, ISerializeBinary
{
T clone;
// todo: don't use AcquireBuffer here!
using (var buffer = BufferManager.AcquireBuffer())
{
using (var ms = new MemoryStream(buffer.Data, true))
{
ms.Position = 0;
using (var writer = new BinaryWriter(ms))
{
writer.Write(obj);
}
}
using (var ms = new MemoryStream(buffer.Data))
{
ms.Position = 0;
using (var reader = new BinaryReader(ms))
{
clone = reader.ReadObject <T>();
}
}
}
return(clone);
}
public FileStreamUnbufferedSequentialWrite(string path, long length, long startPosition, bool truncateOnClose)
{
m_path = path;
m_id = IdentityManager.AcquireIdentity(string.Format("{0}:{1}", this.GetType().Name, m_path));
m_buffer = BufferManager.AcquireBuffer(m_id, true);
m_sectorSize = PathUtil.GetDriveSectorSize(m_path);
m_length = length;
m_lengthAligned = (m_length + (m_sectorSize - 1)) & (~(long)(m_sectorSize - 1));
m_truncateOnClose = truncateOnClose;
const FileMode mode = FileMode.OpenOrCreate;
const FileAccess access = FileAccess.Write;
const FileShare share = FileShare.None;
const FileOptions options = (FileFlagNoBuffering | FileOptions.WriteThrough | FileOptions.SequentialScan);
m_stream = new FileStream(m_path, mode, access, share, BUFFER_SIZE, options);
m_stream.SetLength(m_lengthAligned);
long startPositionAligned = ((startPosition + (m_sectorSize - 1)) & (~(long)(m_sectorSize - 1))) - m_sectorSize;
if (startPositionAligned >= 0)
{
m_stream.Seek(startPositionAligned, SeekOrigin.Begin);
}
else
{
startPositionAligned = 0;
}
m_bufferIndex = (int)(startPosition - startPositionAligned);
}
public FileStreamUnbufferedSequentialRead(string path, long startPosition)
{
m_path = path;
m_id = IdentityManager.AcquireIdentity(string.Format("{0}:{1}", GetType().Name, m_path));
m_buffer = BufferManager.AcquireBuffer(m_id, true);
m_sectorSize = PathUtil.GetDriveSectorSize(m_path);
m_bufferValidSize = m_buffer.Length;
const FileMode mode = FileMode.Open;
const FileAccess access = FileAccess.Read;
const FileShare share = FileShare.Read;
const FileOptions options = (FileFlagNoBuffering | FileOptions.WriteThrough | FileOptions.SequentialScan);
m_stream = new FileStream(m_path, mode, access, share, BUFFER_SIZE, options);
m_streamEnd = new FileStream(m_path, mode, access, share, BUFFER_SIZE, FileOptions.WriteThrough);
Seek(startPosition);
}
public BufferInstance AcquireBuffer(int size, bool pin)
{
return(BufferManager.AcquireBuffer(m_id, size, pin));
}
public BufferInstance AcquireBuffer(bool pin)
{
return(BufferManager.AcquireBuffer(m_id, pin));
}
