bbradson
49 lines
1.1 KiB
C#
49 lines
1.1 KiB
C#
// Copyright (c) 2023 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using System.Collections;
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using System.Runtime.CompilerServices;
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namespace FisheryLib.Pools;
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public record struct PooledIList<T>() : IDisposable where T : IList, new()
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{
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public T List = Get();
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private static T?[] _freeItems = new T[4];
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private static int _freeItemCount;
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public void Dispose()
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{
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if (List == null)
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return;
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Return(List);
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List = default!;
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}
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public static T Get()
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{
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if (_freeItemCount == 0)
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return Reflection.New<T>();
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var freeItem = _freeItems[--_freeItemCount];
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_freeItems[_freeItemCount] = default;
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return freeItem!;
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}
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public static void Return(T item)
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{
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item.Clear();
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if (++_freeItemCount >= _freeItems.Length)
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ExpandFreeItems();
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_freeItems[_freeItemCount - 1] = item;
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}
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[MethodImpl(MethodImplOptions.NoInlining)]
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private static void ExpandFreeItems() => Array.Resize(ref _freeItems, _freeItems.Length << 1);
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} |