private void RemoveState(int frame, int branch = -1)
{
if (branch == -1)
{
accessed.Remove(States[frame]);
}
else if (accessed.Contains(BranchStates[frame][branch]) && !Settings.EraseBranchStatesFirst)
{
accessed.Remove(BranchStates[frame][branch]);
}
StateManagerState state;
bool hasDuplicate = stateHasDuplicate(frame, branch) != -2;
if (branch == -1)
{
state = States[frame];
if (States[frame].IsOnDisk)
{
States[frame].Dispose();
}
else
{
Used -= (ulong)States[frame].Length;
}
States.RemoveAt(States.IndexOfKey(frame));
}
else
{
state = BranchStates[frame][branch];
if (BranchStates[frame][branch].IsOnDisk)
{
BranchStates[frame][branch].Dispose();
}
else
{
Used -= (ulong)BranchStates[frame][branch].Length;
}
BranchStates[frame].RemoveAt(BranchStates[frame].IndexOfKey(branch));
if (BranchStates[frame].Count == 0)
{
BranchStates.Remove(frame);
}
}
if (!hasDuplicate)
{
lowPriorityStates.Remove(state);
}
}
/// <summary>
/// X is the frame of the state, Y is the branch (-1 for current).
/// </summary>
private Point StateToRemove()
{
// X is frame, Y is branch
Point shouldRemove = new Point(-1, -1);
if (BranchStates.Any() && Settings.EraseBranchStatesFirst)
{
var kvp = BranchStates.Count() > 1 ? BranchStates.ElementAt(1) : BranchStates.ElementAt(0);
shouldRemove.X = kvp.Key;
shouldRemove.Y = kvp.Value.Keys[0];
return(shouldRemove);
}
int i = 0;
int markerSkips = maxStates / 2;
// lowPrioritySates (e.g. states with only lag frames between them)
do
{
if (lowPriorityStates.Count > i)
{
shouldRemove = findState(lowPriorityStates[i]);
}
else
{
break;
}
// Keep marker states
markerSkips--;
if (markerSkips < 0)
{
shouldRemove.X = -1;
}
i++;
} while (StateIsMarker(shouldRemove.X, shouldRemove.Y) && markerSkips > -1 || shouldRemove.X == 0);
// by last accessed
markerSkips = maxStates / 2;
if (shouldRemove.X < 1)
{
i = 0;
do
{
if (accessed.Count > i)
{
shouldRemove = findState(accessed[i]);
}
else
{
break;
}
// Keep marker states
markerSkips--;
if (markerSkips < 0)
{
shouldRemove.X = -1;
}
i++;
} while (StateIsMarker(shouldRemove.X, shouldRemove.Y) && markerSkips > -1 || shouldRemove.X == 0);
}
if (shouldRemove.X < 1) // only found marker states above
{
if (BranchStates.Any() && !Settings.EraseBranchStatesFirst)
{
var kvp = BranchStates.Count() > 1 ? BranchStates.ElementAt(1) : BranchStates.ElementAt(0);
shouldRemove.X = kvp.Key;
shouldRemove.Y = kvp.Value.Keys[0];
}
else
{
StateManagerState s = States.Values[1];
shouldRemove.X = s.Frame;
shouldRemove.Y = -1;
}
}
return(shouldRemove);
}