private MoveSet GetValidMoves(PieceName pieceName)
{
if (null == _cachedValidMovesByPiece)
{
_cachedValidMovesByPiece = new MoveSet[EnumUtils.NumPieceNames];
}
int pieceNameIndex = (int)pieceName;
if (null != _cachedValidMovesByPiece[pieceNameIndex])
{
// MoveSet is cached in L1 cache
ValidMoveCacheMetricsSet["ValidMoves." + EnumUtils.GetShortName(pieceName)].Hit();
}
else
{
// MoveSet is not cached in L1 cache
ValidMoveCacheMetricsSet["ValidMoves." + EnumUtils.GetShortName(pieceName)].Miss();
// Calculate MoveSet
Piece targetPiece = GetPiece(pieceName);
MoveSet moves = GetValidMovesInternal(targetPiece);
moves.Lock();
// Populate cache
_cachedValidMovesByPiece[pieceNameIndex] = moves;
}
return(_cachedValidMovesByPiece[pieceNameIndex]);
}
public MoveSet GetValidMoves()
{
MoveSet moves = new MoveSet();
if (GameInProgress)
{
foreach (PieceName pieceName in CurrentTurnPieces)
{
moves.Add(GetValidMoves(pieceName));
}
if (moves.Count == 0)
{
moves.Add(Move.Pass);
}
}
moves.Lock();
return(moves);
}