76 lines
1.6 KiB
C#
76 lines
1.6 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2019 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version. For more
|
|
* information, see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
|
|
namespace OpenRA.Mods.Common.Pathfinder
|
|
{
|
|
public class PathCacheStorage : ICacheStorage<List<CPos>>
|
|
{
|
|
class CachedPath
|
|
{
|
|
public List<CPos> Result;
|
|
public int Tick;
|
|
}
|
|
|
|
const int MaxPathAge = 50;
|
|
readonly World world;
|
|
Dictionary<string, CachedPath> cachedPaths = new Dictionary<string, CachedPath>(100);
|
|
|
|
public PathCacheStorage(World world)
|
|
{
|
|
this.world = world;
|
|
}
|
|
|
|
public void Remove(string key)
|
|
{
|
|
cachedPaths.Remove(key);
|
|
}
|
|
|
|
public void Store(string key, List<CPos> data)
|
|
{
|
|
// Eventually clean up the cachedPaths dictionary
|
|
if (cachedPaths.Count >= 100)
|
|
foreach (var cachedPath in cachedPaths.Where(p => IsExpired(p.Value)).ToList())
|
|
cachedPaths.Remove(cachedPath.Key);
|
|
|
|
cachedPaths.Add(key, new CachedPath
|
|
{
|
|
Tick = world.WorldTick,
|
|
Result = data
|
|
});
|
|
}
|
|
|
|
public List<CPos> Retrieve(string key)
|
|
{
|
|
CachedPath cached;
|
|
if (cachedPaths.TryGetValue(key, out cached))
|
|
{
|
|
if (IsExpired(cached))
|
|
{
|
|
cachedPaths.Remove(key);
|
|
return null;
|
|
}
|
|
|
|
return cached.Result;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
bool IsExpired(CachedPath path)
|
|
{
|
|
return world.WorldTick - path.Tick > MaxPathAge;
|
|
}
|
|
}
|
|
}
|