在c＃中使用c ++ dll的main函数是否可以 [英] Is it ok to use main function for c++ dll in c#

问题描述

我创建了一个c ++ dll，其中我返回一个最初作为参数传递给它的修改过的字符串，

i我在c＃中调用main函数使用

i have created a c++ dll in which i am returning a modified string originally passed to it as argument,
i am calling main function in my c# using

[DllImport("StringManupulation.dll", CallingConvention = CallingConvention.Cdecl)]
        static extern IntPtr main(string a);

可以使用这样的主要功能，我没有要求再调用除main之外的其他功能。





你也将如何在c＃~main（）的每次调用中破坏主函数分配的内存？我想在它们返回值后删除c＃中指针分配的memroy



ifstream :: pos_type size;

char * memblock;

char * CodeSend;



//逻辑在这里



删除[ ] memblock;

delete [] CodeSend;

返回CodeSend;

但这在我的情况下不起作用

is it ok to use main function like that, i dont have requriement to call any more functions other than main.


also how would you destory the memory allocated by main function in each call from c# ~main() ? i want to delete the memroy allocated by pointer in c# after they have returned value

ifstream::pos_type size;
char * memblock;
char* CodeSend;

//logic here

delete [] memblock;
delete [] CodeSend;
return CodeSend;
but this would not work in my case

推荐答案

一个DLL文件不应该有一个 main fucntion - 它意味着它有一个入口点，可以单独运行 - 它不应该。



因为你创建了DLL，我会重命名函数ModString或者描述它对参数的作用 - 这就是代码使用它更自我记录。



要释放内存，我有一个发布方法，或者更好的是在已经分配的块中有C＃传递该函数可以放置修改后的版本的内存。如果你那样做，那么确保你不会因内存泄漏而更加安全和容易。

A DLL file shouldn't have a main fucntion - it implies it has an entry point and can be run in isolation - which it shouldn't.

Since you created the DLL, I'd rename the function "ModString" or something which describes what it does to the parameter - that way the code using it is more self documenting.

To deallocate the memory, I'd have a "release" method, or better still have the C# pass in an already allocated block of memory in which the function can place the modified version. It's a lot safer and easier than trying to ensure you don't end up with memory leaks if you do it that way.

答案是：不！

1.这是一个保留名称，所以它不会被使用。

2.使用说话名称也是一种对话，所以每个人（甚至在10年内）都知道这个功能是什么。

The answer is: No!
1. It is a "reserved name" so it makes sence not to used.
2. It is also convetion to use "speaking name" so everybody (even in 10 years) know what the function makes.

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