75 lines
1.6 KiB
C#
75 lines
1.6 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2016 The OpenRA Developers (see AUTHORS)
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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.Collections.Generic;
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using System.Linq;
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namespace OpenRA.Mods.Common.Pathfinder
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{
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public class PathCacheStorage : ICacheStorage<List<CPos>>
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{
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class CachedPath
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{
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public List<CPos> Result;
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public int Tick;
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}
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const int MaxPathAge = 50;
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readonly World world;
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Dictionary<string, CachedPath> cachedPaths = new Dictionary<string, CachedPath>(100);
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public PathCacheStorage(World world)
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{
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this.world = world;
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}
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public void Remove(string key)
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{
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cachedPaths.Remove(key);
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}
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public void Store(string key, List<CPos> data)
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{
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// Eventually clean up the cachedPaths dictionary
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if (cachedPaths.Count >= 100)
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foreach (var cachedPath in cachedPaths.Where(p => IsExpired(p.Value)).ToList())
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cachedPaths.Remove(cachedPath.Key);
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cachedPaths.Add(key, new CachedPath
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{
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Tick = world.WorldTick,
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Result = data
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});
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}
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public List<CPos> Retrieve(string key)
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{
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CachedPath cached;
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if (cachedPaths.TryGetValue(key, out cached))
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{
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if (IsExpired(cached))
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{
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cachedPaths.Remove(key);
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return null;
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}
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return cached.Result;
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}
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return null;
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}
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bool IsExpired(CachedPath path)
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{
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return world.WorldTick - path.Tick > MaxPathAge;
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}
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}
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} |