public IoSession(SubFileStream stream)
{
m_stream = stream;
m_lastEditedBlock = stream.m_dataReader.LastCommittedHeader.LastAllocatedBlock;
m_isReadOnly = stream.m_isReadOnly;
m_blockDataLength = m_stream.m_blockSize - FileStructureConstants.BlockFooterLength;
m_ioSessions = new SubFileDiskIoSessionPool(stream.m_dataReader, stream.m_fileHeaderBlock, stream.m_subFile, stream.m_isReadOnly);
if (m_isReadOnly)
{
m_parser = new IndexParser(m_ioSessions);
}
else
{
m_pager = new ShadowCopyAllocator(m_ioSessions);
m_parser = m_pager;
}
}
private void ClearIndexNodeCache(IoSession caller, IndexParser mostRecentParser)
{
if (!m_fileHeaderBlock.IsSimplifiedFileFormat)
{
if (m_ioStream1 != null && !m_ioStream1.IsDisposed && m_ioStream1 != caller)
(m_ioStream1 as IoSession).ClearIndexCache(mostRecentParser);
if (m_ioStream2 != null && !m_ioStream2.IsDisposed && m_ioStream2 != caller)
(m_ioStream2 as IoSession).ClearIndexCache(mostRecentParser);
}
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="IoSession"/> object and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected override void Dispose(bool disposing)
{
if (!m_disposed)
{
try
{
// This will be done regardless of whether the object is finalized or disposed.
if (disposing)
{
if (m_ioSessions != null)
{
m_ioSessions.Dispose();
m_ioSessions = null;
}
// This will be done only when the object is disposed by calling Dispose().
}
}
finally
{
m_parser = null;
m_pager = null;
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
public void ClearIndexCache(IndexParser mostRecentParser)
{
if (IsDisposed || m_ioSessions.IsDisposed)
throw new ObjectDisposedException(GetType().FullName);
m_parser.ClearIndexCache(mostRecentParser);
}
/// <summary>
/// Resets the index cache with the information from the supplied <see cref="mostRecentParser"/>
/// </summary>
/// <param name="mostRecentParser"></param>
public void ClearIndexCache(IndexParser mostRecentParser)
{
FirstIndirectBlockAddress = mostRecentParser.FirstIndirectBlockAddress;
SecondIndirectBlockAddress = mostRecentParser.SecondIndirectBlockAddress;
ThirdIndirectBlockAddress = mostRecentParser.ThirdIndirectBlockAddress;
FourthIndirectBlockAddress = mostRecentParser.FourthIndirectBlockAddress;
DataClusterAddress = mostRecentParser.DataClusterAddress;
MapPosition(mostRecentParser.BaseVirtualAddressIndexValue);
m_oldFirstOffset = -1;
}
