50 lines
1.1 KiB
C#
50 lines
1.1 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine.Assertions;
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namespace UnityEditor.ShaderGraph
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{
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class PooledHashSet<T> : HashSet<T>, IDisposable
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{
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static Stack<PooledHashSet<T>> s_Pool = new Stack<PooledHashSet<T>>();
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bool m_Active;
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PooledHashSet() { }
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public static PooledHashSet<T> Get()
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{
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if (s_Pool.Count == 0)
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{
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return new PooledHashSet<T> { m_Active = true };
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}
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var list = s_Pool.Pop();
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list.m_Active = true;
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#if DEBUG
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GC.ReRegisterForFinalize(list);
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#endif
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return list;
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}
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public void Dispose()
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{
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Assert.IsTrue(m_Active);
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m_Active = false;
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Clear();
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s_Pool.Push(this);
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#if DEBUG
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GC.SuppressFinalize(this);
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#endif
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}
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// Destructor causes some GC alloc so only do this sanity check in debug build
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#if DEBUG
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~PooledHashSet()
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{
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throw new InvalidOperationException($"{nameof(PooledHashSet<T>)} must be disposed manually.");
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}
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#endif
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}
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}
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