internal void UpdateSnapshot(Snapshot snapshot, bool forceFullRebuild)
{
if (SuspendRebuilding)
{
return;
}
lock (AddLock)
{
// Start by rebasing if necessary
bool forceUpdate = false;
if (RebaseBlocks)
{
snapshot.Rebase(AddressRange.Min, AddressWidth);
RebaseBlocks = false;
forceUpdate = true;
}
UInt64 maxTime = ArtificialMaxTime;
if (maxTime == 0)
{
maxTime = TimeRange.Max;
}
IEnumerable<KeyValuePair<TimeStamp, IPacket>> packets = null;
bool isBackward = false;
if (forceFullRebuild)
{
snapshot.Reset();
packets = Get();
}
else
{
// Determine what entries we need to get based off scrubber position
UInt64 timeRange = maxTime - TimeRange.Min;
// Readjust the position if needed
if (ArtificialMaxTime == 0 && timeRange > 0)
{
double rangeScale = (double)LastRange / (double)timeRange;
if (rangeScale > 0 && Scrubber._Position < 1.0)
{
// Hacky
Scrubber._Position *= rangeScale;
Scrubber._Position = Scrubber._Position.Clamp(0.0, 1.0);
Scrubber.FlagRedraw();
}
}
LastRange = timeRange;
double position = Scrubber.Position;
UInt64 currentTime = TimeRange.Min + (UInt64)((double)timeRange * position);
bool nothingToProcess = false;
if (currentTime > LastTimestamp.Time)
{
packets = GetForward(new TimeStamp(currentTime));
}
else if (currentTime < LastTimestamp.Time)
{
packets = GetBackward(new TimeStamp(currentTime));
isBackward = true;
}
else
{
nothingToProcess = true;
}
LastTimestamp = new TimeStamp(currentTime);
if (nothingToProcess && !forceUpdate)
{
return;
}
}
if (AddressRange.Max < AddressRange.Min)
{
return;
}
// Create final list, removing allocations as frees are encountered
if (packets != null)
{
int index = 0;
foreach (var pair in packets)
{
// On a full rebuild, if there's a position specified in
// the snapshot, only go up to that position
if (forceFullRebuild && snapshot.Position > 0)
{
if (index > snapshot.Position)
{
break;
}
}
// TODO: Can allocation and free processing be combined?
// They should be exact opposites of each other
if (pair.Value is Allocation)
{
Allocation allocation = pair.Value as Allocation;
if (!isBackward)
{
MemoryBlock newBlock = snapshot.Add(
allocation, AddressRange.Min, AddressWidth);
}
else
{
snapshot.Remove(allocation.Address);
}
}
else
{
Free free = pair.Value as Free;
if (snapshot.Find(free.Address) != null)
{
MemoryBlock removedBlock = snapshot.Remove(free.Address);
if (removedBlock != null)
{
removedBlock.Allocation.AssociatedFree = free;
free.AssociatedAllocation = removedBlock.Allocation;
}
}
else
{
if (isBackward)
{
MemoryBlock newBlock = snapshot.Add(
free.AssociatedAllocation, AddressRange.Min, AddressWidth);
}
}
}
index++;
}
if (!forceFullRebuild || snapshot.Position == 0)
{
snapshot.Position = Position;
}
}
if (Rebuilt != null)
{
EventArgs e = new EventArgs();
Rebuilt.Invoke(this, e);
}
} //);
}