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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| using System; | ||
| using System.Buffers; | ||
| using System.Runtime.CompilerServices; | ||
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|
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| namespace DotRecast.Core.Buffers | ||
| { | ||
| public static class RcRentedArray | ||
| { | ||
| public static RcRentedArray<T> RentDisposableArray<T>(int minimumLength) | ||
| { | ||
| var array = ArrayPool<T>.Shared.Rent(minimumLength); | ||
| return new RcRentedArray<T>(ArrayPool<T>.Shared, array, minimumLength); | ||
| } | ||
| } | ||
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|
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| public class RcRentedArray<T> : IDisposable | ||
| { | ||
| private ArrayPool<T> _owner; | ||
| private T[] _array; | ||
| private readonly RcAtomicInteger _disposed; | ||
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| public int Length { get; } | ||
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| internal RcRentedArray(ArrayPool<T> owner, T[] array, int length) | ||
| { | ||
| _owner = owner; | ||
| _array = array; | ||
| Length = length; | ||
| _disposed = new RcAtomicInteger(0); | ||
| } | ||
|
|
||
| public T this[int index] | ||
| { | ||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| get | ||
| { | ||
| ThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length); | ||
| return _array[index]; | ||
| } | ||
|
|
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| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| set | ||
| { | ||
| ThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length); | ||
| _array[index] = value; | ||
| } | ||
| } | ||
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| public void Dispose() | ||
| { | ||
| if (1 != _disposed.IncrementAndGet()) | ||
| return; | ||
|
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| _owner?.Return(_array, true); | ||
| _array = null; | ||
| _owner = null; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using DotRecast.Core.Buffers; | ||
| using NUnit.Framework; | ||
|
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| namespace DotRecast.Core.Test; | ||
|
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| public class RcRentedArrayTest | ||
| { | ||
| public List<int> RandomValues(int length) | ||
| { | ||
| var rand = new RcRand(); | ||
|
|
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| // excepted values | ||
| var list = new List<int>(); | ||
| for (int i = 0; i < length; ++i) | ||
| { | ||
| list.Add(rand.NextInt32()); | ||
| } | ||
|
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| return list; | ||
| } | ||
|
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||
| [Test] | ||
| public void Test() | ||
| { | ||
| var rand = new RcRand(); | ||
| for (int loop = 0; loop < 1024; ++loop) | ||
| { | ||
| int length = (int)(rand.Next() * 2048); | ||
| var values = RandomValues(length); | ||
| using var array = RcRentedArray.RentDisposableArray<float>(length); | ||
|
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| for (int i = 0; i < array.Length; ++i) | ||
| { | ||
| array[i] = values[i]; | ||
| } | ||
|
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| for (int i = 0; i < array.Length; ++i) | ||
| { | ||
| Assert.That(array[i], Is.EqualTo(values[i])); | ||
| } | ||
|
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| Assert.That(array[^1], Is.EqualTo(values[^1])); | ||
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| Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0); | ||
| Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0); | ||
| Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]); | ||
| Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]); | ||
| } | ||
| } | ||
| } |