89 lines
2.4 KiB
C#
89 lines
2.4 KiB
C#
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//#define ASTAR_NO_POOLING // Disable pooling for some reason. Maybe for debugging or just for measuring the difference.
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using System;
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using System.Collections.Generic;
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namespace Pathfinding {
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/// <summary>Pools path objects to reduce load on the garbage collector</summary>
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public static class PathPool {
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static readonly Dictionary<Type, Stack<Path> > pool = new Dictionary<Type, Stack<Path> >();
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static readonly Dictionary<Type, int> totalCreated = new Dictionary<Type, int>();
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/// <summary>
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/// Adds a path to the pool.
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/// This function should not be used directly. Instead use the Path.Claim and Path.Release functions.
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/// </summary>
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public static void Pool (Path path) {
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#if !ASTAR_NO_POOLING
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lock (pool) {
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if (((IPathInternals)path).Pooled) {
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throw new System.ArgumentException("The path is already pooled.");
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}
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Stack<Path> poolStack;
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if (!pool.TryGetValue(path.GetType(), out poolStack)) {
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poolStack = new Stack<Path>();
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pool[path.GetType()] = poolStack;
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}
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((IPathInternals)path).Pooled = true;
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((IPathInternals)path).OnEnterPool();
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poolStack.Push(path);
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}
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#endif
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}
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/// <summary>Total created instances of paths of the specified type</summary>
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public static int GetTotalCreated (Type type) {
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int created;
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if (totalCreated.TryGetValue(type, out created)) {
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return created;
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} else {
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return 0;
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}
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}
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/// <summary>Number of pooled instances of a path of the specified type</summary>
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public static int GetSize (Type type) {
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Stack<Path> poolStack;
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if (pool.TryGetValue(type, out poolStack)) {
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return poolStack.Count;
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} else {
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return 0;
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}
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}
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/// <summary>Get a path from the pool or create a new one if the pool is empty</summary>
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public static T GetPath<T>() where T : Path, new() {
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#if ASTAR_NO_POOLING
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T result = new T();
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((IPathInternals)result).Reset();
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return result;
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#else
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lock (pool) {
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T result;
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Stack<Path> poolStack;
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if (pool.TryGetValue(typeof(T), out poolStack) && poolStack.Count > 0) {
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// Guaranteed to have the correct type
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result = poolStack.Pop() as T;
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} else {
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result = new T();
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// Make sure an entry for the path type exists
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if (!totalCreated.ContainsKey(typeof(T))) {
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totalCreated[typeof(T)] = 0;
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}
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totalCreated[typeof(T)]++;
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}
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((IPathInternals)result).Pooled = false;
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((IPathInternals)result).Reset();
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return result;
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}
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#endif
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}
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}
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}
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