如何使用不安全的代码Unity [英] How to use unsafe code Unity

问题描述

我想在C#中使用C ++代码来统一使用CLR.

I want to use c++ code in c# for unity using CLR.

程序在统一之外可以正常运行，但是在引擎内部却给我一个错误:
"cs0227:不安全代码要求指定'unsafe'命令行选项"

The program works properly outside of unity, but inside of engine it gives me an error:
"cs0227: unsafe code requires the 'unsafe' command line option to be specified"

我真的很困惑，因为该项目在Visual Studio中成功构建(没有任何错误或警告).我已激活"允许 不安全"按钮.

I am really confused, because the project builds successfully in visual studio (without any errors or warnings). I have "allow unsafe" button activated.

using UnityEngine;
using System.Collections;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


public class newspawn_real : MonoBehaviour {

void Start () {

    unsafe
        {

            fixed (int * p = &bam[0, 0, 0])
            {
                CppWrapper.CppWrapperClass controlCpp = new CppWrapper.CppWrapperClass();

                controlCpp.allocate_both();
                controlCpp.fill_both();
                controlCpp.fill_wrapper();
}

推荐答案

您必须在Unity中显式启用unsafe代码.您可以按照以下步骤操作:

You have to explicitly enable unsafe code in Unity. You can follow the steps below:

1 .第一步，将 Api兼容性级别更改为 .NET 2.0子集.

1. First step, Change Api Compatibility Level to .NET 2.0 Subset.

2 .在您的<Project Path>/Assets目录中创建一个文件，并将其命名为 smcs.rsp ，然后将-unsafe放入该文件中.保存并关闭该文件.

2. Create a file in your <Project Path>/Assets directory and name it smcs.rsp then put -unsafe inside that file. Save and close that file.

关闭并重新打开Visual Studio和Unity. 您必须重新启动它们.

值得注意的是，即使这样做并重新启动Unity和Visual Studio，但问题仍然存在，将 smcs.rsp 文件重命名为 csc.rsp 或 gmcs.rsp ，然后每次重新启动直到你得到一个可行的.虽然， smcs.rsp 应该是第一次.

It's worth noting that even after doing this and re-starting both Unity and Visual Studio but the problem is still there, rename the smcs.rsp file to csc.rsp, or gmcs.rsp and re-start each time until you get one that works. Although, smcs.rsp should do it the first time.

此后编译的简单C#不安全代码.

Simple C# unsafe code that compiles after this.

public class newspawn_real : MonoBehaviour
{
    unsafe static void SquarePtrParam(int* p)
    {
        *p *= *p;
    }

    void Start()
    {
        unsafe
        {
            int i = 5;
            // Unsafe method: uses address-of operator (&):
            SquarePtrParam(&i);
            Debug.Log(i);
        }
    }
}

对于最新的Unity版本，文件名应为 mcs.rsp .其他所有内容都保持不变.

For the latest Unity version, the file name should be mcs.rsp. Everything else remains the-same.

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