92 lines
2.9 KiB
C#
92 lines
2.9 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="ValueBox"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Data
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{
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public interface IValueBox
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{
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ref object ValueReference { get; }
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static virtual IValueBox<T> AsGeneric<T>(IValueBox box) where T: unmanaged
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{
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if (box is not IValueBox<T> genericBox) {
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return null;
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}
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return genericBox;
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}
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static virtual bool IsGeneric<T>(IValueBox box) where T: unmanaged
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{
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return box is IValueBox<T>;
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}
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}
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public interface IValueBox<T> where T: unmanaged
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{
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T Value { get; set; }
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}
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/// <summary>
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/// A class attempt to reduce cost of boxing, though still a bit slower than direct access to
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/// _origin value type instance.
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/// </summary>
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/// <typeparam name="T">
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/// Type of instance to be boxed.
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/// </typeparam>
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public class ValueBox<T> : IValueBox, IValueBox<T> where T: unmanaged
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{
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private T _value;
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public ValueBox(T value)
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{
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_value = value;
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}
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public ref object ValueReference => ref Unsafe.As<T, object>(ref _value);
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public T Value
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{
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get => _value;
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set => _value = value;
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}
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}
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}
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