/// <summary>
/// Processes all pages, computing checksums to determine chunks of virtual pages that have changed
/// </summary>
private void ProcessPages()
{
// Check for newly allocated pages
lock (this.ChunkLock)
{
foreach (RegionProperties newPage in this.CollectNewPages())
{
this.ChunkList.AddFirst(newPage);
}
}
Int32 chunkLimit;
if (this.IsTaskComplete)
{
chunkLimit = ChunkLinkedListPrefilter.ChunkLimit;
}
else
{
chunkLimit = ChunkLinkedListPrefilter.RampUpChunkLimit;
}
lock (this.ChunkLock)
{
// Process the allowed amount of chunks from the priority queue
Parallel.For(
0,
Math.Min(this.ChunkList.Count, chunkLimit),
SettingsViewModel.GetInstance().ParallelSettings,
index =>
{
RegionProperties chunk;
Boolean success = false;
// Grab next available element
lock (this.ElementLock)
{
chunk = this.ChunkList.FirstOrDefault();
if (chunk == null)
{
return;
}
this.ChunkList.RemoveFirst();
// Do not process chunks that have been marked as changed
if (chunk.HasChanged)
{
this.ChunkList.AddLast(chunk);
return;
}
}
// Read current page data for chunk
Byte[] pageData = EngineCore.GetInstance().OperatingSystemAdapter?.ReadBytes(chunk.BaseAddress, chunk.RegionSize, out success);
// Read failed; Deallocated page
if (!success)
{
return;
}
// Update chunk
chunk.Update(pageData);
// Recycle it
lock (this.ElementLock)
{
ChunkList.AddLast(chunk);
}
});
}
}