/// <summary>
/// Creates a new instance of this class.
/// </summary>
/// <param name="ioSessions">IoSessions to use to read from this disk</param>
public IndexParser(SubFileDiskIoSessionPool ioSessions)
: base(ioSessions.Header.BlockSize)
{
m_subFile = ioSessions.File;
m_ioSessions = ioSessions;
m_oldFirstOffset = -1;
}
/// <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().
}
}
}
/// <summary>
/// Creates a new instance of this class.
/// </summary>
/// <param name="ioSessions">IoSessions to use to read from this disk</param>
public IndexParser(SubFileDiskIoSessionPool ioSessions)
: base(ioSessions.Header.BlockSize)
{
m_subFile = ioSessions.File;
m_ioSessions = ioSessions;
m_oldFirstOffset = -1;
}
/// <summary>
/// Creates a <see cref="ShadowCopyAllocator"/> that is used make shadow copies of blocks.
/// </summary>
/// <param name="ioSessions"></param>
public ShadowCopyAllocator(SubFileDiskIoSessionPool ioSessions)
: base(ioSessions)
{
if (ioSessions == null)
throw new ArgumentNullException("ioSessions");
if (ioSessions.IsReadOnly)
throw new ArgumentException("DataReader is read only", "ioSessions");
m_lastReadOnlyBlock = ioSessions.LastReadonlyBlock;
m_fileHeaderBlock = ioSessions.Header;
m_subFileHeader = ioSessions.File;
m_ioSessions = ioSessions;
}
/// <summary>
/// Creates a <see cref="ShadowCopyAllocator"/> that is used make shadow copies of blocks.
/// </summary>
/// <param name="ioSessions"></param>
public ShadowCopyAllocator(SubFileDiskIoSessionPool ioSessions)
: base(ioSessions)
{
if (ioSessions == null)
{
throw new ArgumentNullException("ioSessions");
}
if (ioSessions.IsReadOnly)
{
throw new ArgumentException("DataReader is read only", "ioSessions");
}
m_lastReadOnlyBlock = ioSessions.LastReadonlyBlock;
m_fileHeaderBlock = ioSessions.Header;
m_subFileHeader = ioSessions.File;
m_ioSessions = ioSessions;
}
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;
}
}
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;
}
}
/// <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().
}
}
}
