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* Make all structs readonly when applicable. It should reduce amount of needless defensive copies * Make structs with trivial boilerplate equality code record structs * Remove unnecessary readonly modifiers from TextureCreateInfo * Make BitMap structs readonly too
90 lines
2.6 KiB
C#
90 lines
2.6 KiB
C#
using System;
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namespace Ryujinx.Common.Memory
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{
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/// <summary>
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/// A struct that can represent both a Span and Array.
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/// This is useful to keep the Array representation when possible to avoid copies.
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/// </summary>
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/// <typeparam name="T">Element Type</typeparam>
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public readonly ref struct SpanOrArray<T> where T : unmanaged
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{
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public readonly T[] Array;
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public readonly ReadOnlySpan<T> Span;
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/// <summary>
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/// Create a new SpanOrArray from an array.
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/// </summary>
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/// <param name="array">Array to store</param>
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public SpanOrArray(T[] array)
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{
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Array = array;
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Span = ReadOnlySpan<T>.Empty;
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}
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/// <summary>
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/// Create a new SpanOrArray from a readonly span.
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/// </summary>
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/// <param name="array">Span to store</param>
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public SpanOrArray(ReadOnlySpan<T> span)
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{
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Array = null;
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Span = span;
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}
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/// <summary>
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/// Return the contained array, or convert the span if necessary.
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/// </summary>
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/// <returns>An array containing the data</returns>
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public T[] ToArray()
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{
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return Array ?? Span.ToArray();
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}
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/// <summary>
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/// Return a ReadOnlySpan from either the array or ReadOnlySpan.
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/// </summary>
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/// <returns>A ReadOnlySpan containing the data</returns>
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public ReadOnlySpan<T> AsSpan()
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{
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return Array ?? Span;
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}
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/// <summary>
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/// Cast an array to a SpanOrArray.
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/// </summary>
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/// <param name="array">Source array</param>
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public static implicit operator SpanOrArray<T>(T[] array)
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{
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return new SpanOrArray<T>(array);
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}
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/// <summary>
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/// Cast a ReadOnlySpan to a SpanOrArray.
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/// </summary>
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/// <param name="span">Source ReadOnlySpan</param>
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public static implicit operator SpanOrArray<T>(ReadOnlySpan<T> span)
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{
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return new SpanOrArray<T>(span);
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}
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/// <summary>
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/// Cast a Span to a SpanOrArray.
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/// </summary>
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/// <param name="span">Source Span</param>
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public static implicit operator SpanOrArray<T>(Span<T> span)
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{
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return new SpanOrArray<T>(span);
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}
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/// <summary>
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/// Cast a SpanOrArray to a ReadOnlySpan
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/// </summary>
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/// <param name="spanOrArray">Source SpanOrArray</param>
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public static implicit operator ReadOnlySpan<T>(SpanOrArray<T> spanOrArray)
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{
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return spanOrArray.AsSpan();
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}
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}
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}
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