95 lines
3.0 KiB
C#
95 lines
3.0 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="ValueBox.cs"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 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: struct
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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: struct
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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: struct
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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: struct
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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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