internal VirtualView(VirtualViewContainer accessor, long view_offset, long offset, long capacity)
{
m_viewoffset = view_offset;
m_viewaccessor = accessor;
m_offset = offset;
m_capacity = capacity;
}
/// <summary>
/// Create a VirtualView
/// </summary>
/// <param name="offset">absolute offset</param>
/// <param name="length">length of virtual view</param>
/// <returns>VirtualView instance</returns>
public VirtualView CreateView(long offset, long length)
{
var range = new Range <Int64> {
Minimum = offset, Maximum = offset + length
};
//look for views in that size
var view = GetViewByRange(range);
if (view != null)
{
Statistics.NumberOfViewReuse++;
//if found, create MappedViewContainer
var mappedViewContainer = new VirtualViewContainer {
Container = view, Range = range
};
mappedViewContainer.MappedView = new VirtualView(mappedViewContainer, view.Range.Minimum, offset, length);
view.MappedViews.Add(mappedViewContainer);
//ClearUnusedMappings();
return(mappedViewContainer.MappedView);
}
//if not found, create view, create MappedViewContainer
var maximized = GetMaximizedRange(offset, length);
var container = new MemoryMappedViewContainer();
container.Range = maximized;
container.MemoryMapper = this;
//container.View = m_mmf.CreateViewAccessor(maximized.Minimum, maximized.Maximum - maximized.Minimum, MemoryMappedFileAccess.ReadWrite);
m_views.Add(container);
Statistics.NumberOfViewCreates++;
//recursively get view (no reason to implement logic twice, only for optimizations)
return(CreateView(offset, length));
}
public void Dispose()
{
//m_viewaccessor.Container.View.Flush();
m_viewaccessor.Container.MappedViews.Remove(m_viewaccessor);
m_viewaccessor = null;
}
