XiuXianGame/Assets/Scripts/GameLogic/MyPlugin.cs

using UnityEngine;
using System.Runtime.InteropServices;

public class MyPlugin : MonoBehaviour
{
    // 声明C++函数
    [DllImport("ThreadTool")]
    private static extern int Add(int a, int b);

    [DllImport("ThreadTool")]
    private static extern void CallCSharpFunction(Callback callback);

    // 定义回调委托
    public delegate int Callback(int value);

    // C#回调函数
    private int MyCallback(int value)
    {
        Debug.Log("C# received value from C++: " + value);
        return value * 2;
    }

    void Start()
    {
        // 调用C++函数
        int result = Add(5, 3);
        Debug.Log("Result from C++: " + result);  // 输出: Result from C++: 8

        // 注册C#回调函数并调用C++函数
        CallCSharpFunction(MyCallback);
    }
}