A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using System;
2using System.Collections.Generic;
3
4namespace Unity.VisualScripting
5{
6 public static class HashSetPool<T>
7 {
8 private static readonly object @lock = new object();
9 private static readonly Stack<HashSet<T>> free = new Stack<HashSet<T>>();
10 private static readonly HashSet<HashSet<T>> busy = new HashSet<HashSet<T>>();
11
12 public static HashSet<T> New()
13 {
14 lock (@lock)
15 {
16 if (free.Count == 0)
17 {
18 free.Push(new HashSet<T>());
19 }
20
21 var hashSet = free.Pop();
22
23 busy.Add(hashSet);
24
25 return hashSet;
26 }
27 }
28
29 public static void Free(HashSet<T> hashSet)
30 {
31 lock (@lock)
32 {
33 if (!busy.Remove(hashSet))
34 {
35 throw new ArgumentException("The hash set to free is not in use by the pool.", nameof(hashSet));
36 }
37
38 hashSet.Clear();
39
40 free.Push(hashSet);
41 }
42 }
43 }
44
45 public static class XHashSetPool
46 {
47 public static HashSet<T> ToHashSetPooled<T>(this IEnumerable<T> source)
48 {
49 var hashSet = HashSetPool<T>.New();
50
51 foreach (var item in source)
52 {
53 hashSet.Add(item);
54 }
55
56 return hashSet;
57 }
58
59 public static void Free<T>(this HashSet<T> hashSet)
60 {
61 HashSetPool<T>.Free(hashSet);
62 }
63 }
64}