public void Collect(List <uint> roots)
{
// first, unset every allocation's Mark flag if it isn't pinned, otherwise treat as root and scan if pinned
foreach (var alloc in _heap)
{
alloc.Mark = alloc.Pin;
if (alloc.Pin)
{
Scan(alloc.Handle);
}
}
// next, scan each of the given roots
foreach (var ptr in roots)
{
Scan(ptr);
}
// at this point, any allocation we failed to mark is unused and may be collected
foreach (var alloc in _heap)
{
if (!alloc.Mark)
{
_usedMem -= alloc.Memory.Memory.Length;
_allocator.Free(alloc.Memory);
alloc.Memory = new MemorySpan(null);
alloc.Type = null;
}
}
}
public void Release()
{
if (--_useCount == 0)
{
_memoryAllocator.Free(this);
}
Debug.Assert(_useCount >= 0);
}