74 lines
2.4 KiB
C#
74 lines
2.4 KiB
C#
/*
|
|
* Copyright 2022 Peter Han
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
|
|
* and associated documentation files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all copies or
|
|
* substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
|
|
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
using System;
|
|
|
|
namespace PeterHan.PLib.Detours {
|
|
/// <summary>
|
|
/// Stores a detoured method, only performing the expensive reflection when the detour is
|
|
/// first used.
|
|
///
|
|
/// This class is not thread safe.
|
|
/// <typeparam name="D">The delegate type to be used to call the detour.</typeparam>
|
|
/// </summary>
|
|
public sealed class DetouredMethod<D> where D : Delegate {
|
|
/// <summary>
|
|
/// Emulates the ability of Delegate.Invoke to actually call the method.
|
|
/// </summary>
|
|
public D Invoke {
|
|
get {
|
|
Initialize();
|
|
return delg;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The method name.
|
|
/// </summary>
|
|
public string Name { get; }
|
|
|
|
/// <summary>
|
|
/// The delegate method which will be called.
|
|
/// </summary>
|
|
private D delg;
|
|
|
|
/// <summary>
|
|
/// The target type.
|
|
/// </summary>
|
|
private readonly Type type;
|
|
|
|
internal DetouredMethod(Type type, string name) {
|
|
this.type = type ?? throw new ArgumentNullException(nameof(type));
|
|
Name = name ?? throw new ArgumentNullException(nameof(name));
|
|
delg = null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes the getter and setter functions immediately if necessary.
|
|
/// </summary>
|
|
public void Initialize() {
|
|
if (delg == null)
|
|
delg = PDetours.Detour<D>(type, Name);
|
|
}
|
|
|
|
public override string ToString() {
|
|
return string.Format("LazyDetouredMethod[type={1},name={0}]", Name, type.FullName);
|
|
}
|
|
}
|
|
}
|