private void GrowLocked(int capacity)
{
var newSize = UnorderedList <T> .PickGrowthSize(_Items.Length, capacity);
var newItems = new InternalWorkItem <T> [newSize];
if (_Count > 0)
{
if (_Head < _Tail)
{
Array.Copy(_Items, _Head, newItems, 0, _Count);
}
else
{
Array.Copy(_Items, _Head, newItems, 0, _Items.Length - _Head);
Array.Copy(_Items, 0, newItems, _Items.Length - _Head, _Tail);
}
}
_Items = newItems;
_Head = 0;
_Tail = (_Count == capacity) ? 0 : _Count;
}