87 lines
1.9 KiB
C#
87 lines
1.9 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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namespace OpenRA.Mods.Common.Pathfinder
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{
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sealed class CellInfoLayerPool
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{
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const int MaxPoolSize = 4;
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readonly Stack<CellLayer<CellInfo>> pool = new Stack<CellLayer<CellInfo>>(MaxPoolSize);
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readonly Map map;
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public CellInfoLayerPool(Map map)
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{
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this.map = map;
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}
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public PooledCellInfoLayer Get()
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{
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return new PooledCellInfoLayer(this);
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}
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CellLayer<CellInfo> GetLayer()
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{
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CellLayer<CellInfo> layer = null;
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lock (pool)
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if (pool.Count > 0)
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layer = pool.Pop();
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// As the default value of CellInfo represents an Unvisited location,
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// we don't need to initialize the values in the layer,
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// we can just clear them to the defaults.
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if (layer == null)
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layer = new CellLayer<CellInfo>(map);
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else
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layer.Clear();
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return layer;
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}
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void ReturnLayer(CellLayer<CellInfo> layer)
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{
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lock (pool)
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if (pool.Count < MaxPoolSize)
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pool.Push(layer);
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}
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public class PooledCellInfoLayer : IDisposable
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{
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CellInfoLayerPool layerPool;
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List<CellLayer<CellInfo>> layers = new List<CellLayer<CellInfo>>();
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public PooledCellInfoLayer(CellInfoLayerPool layerPool)
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{
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this.layerPool = layerPool;
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}
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public CellLayer<CellInfo> GetLayer()
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{
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var layer = layerPool.GetLayer();
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layers.Add(layer);
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return layer;
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}
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public void Dispose()
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{
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if (layerPool != null)
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foreach (var layer in layers)
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layerPool.ReturnLayer(layer);
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layers = null;
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layerPool = null;
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}
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}
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}
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}
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