public IMemoryOwner <byte> GetMemory(PoolPointer poolPointer)
{
lock (PoolPointers)
{
PinnedPointers.Add(poolPointer);
return(new AllocatorMemoryOwner(this, poolPointer, UnderlyingMemory.Slice((int)poolPointer.Offset, (int)poolPointer.Length)));
}
}
public void Compact()
{
lock (PoolPointers)
{
long currentScanOffset = 0;
int currentPinnedPointerIndex = 0;
var pinnedPointers = PinnedPointers
.Concat(PoolPointers.Where(x => x.Fixed))
.OrderBy(x => x.Offset)
.ToArray();
var movablePointers = PoolPointers
.Except(pinnedPointers)
.OrderBy(x => x.Offset);
foreach (var pointer in movablePointers)
{
if (currentScanOffset == pointer.Offset)
{
// Block is already in optimal position
currentScanOffset += pointer.Length;
continue;
}
while (pinnedPointers[currentPinnedPointerIndex].Offset - currentScanOffset < pointer.Length)
{
// There is a pinned pointer in the way. Skip over it
currentScanOffset = pinnedPointers[currentPinnedPointerIndex].Offset +
pinnedPointers[currentPinnedPointerIndex].Length;
currentPinnedPointerIndex++;
}
var originalPosition = UnderlyingMemory.Slice((int)pointer.Offset, (int)pointer.Length);
var newPosition = UnderlyingMemory.Slice((int)currentScanOffset, (int)pointer.Length);
originalPosition.CopyTo(newPosition);
pointer.Offset = currentScanOffset;
currentScanOffset += pointer.Length;
}
}
}
