用于DOTNET的包装，以C ++ CLI BestWay编写的本机传递结构?

本文介绍了用于DOTNET的包装，以C ++ CLI BestWay编写的本机传递结构?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

但是，我正在用C ++ CLI为我们的应用程序编写包装器，以节省一些新部分(用C#编写)并易于访问旧的本机库.因此，我需要将一些结构从C#传递到C ++.这些结构是在C ++ Cli(dotnet)和C ++中定义的.

Yet I am writing a wrapper in C++ CLI for our application to give some new parts (written in C#) save and easy access to old native libraries. Therefore I need to pass some structures from C# to C++. These structures are defined in C++ Cli (dotnet) and also in C++.

示例:

\\C+++ typedef struct { INFO16 jahr ; INFO8 monat ; INFO8 tag ; INFO8 stunde ; INFO8 minute ; } SDATUM; \\c++ cli [StructLayout(LayoutKind::Explicit)] public value struct SDATUM { public: [FieldOffset(0)] UInt16 jahr; [FieldOffset(2)] Byte monat; [FieldOffset(3)] Byte tag; [FieldOffset(4)] Byte stunde; [FieldOffset(5)] Byte minute; };

现在，我在C ++ cli中提供了一些函数，它们通过值，引用(基准百分比)和指针基准*的形式接受该类型作为点网类型SDATUM，就像那里的相应本机函数一样.我需要转换/广播这些结构吗?

Now I provide some functions in C++ cli which accept this type as dotnet type SDATUM in form of pass by value,by reference (sdatum%) and pointer sdatum* like there corresponding native functions. What do I need to convert/cast these struct?

推荐答案

我发现了另一种解决方案，该解决方案非常简单，简短，并且不需要复制数据. 您可以通过以下方式调用需要C SDATUM的本机函数:

I found another solution which is very easy, short and does not need copying data. You could call native functions which want a C SDATUM in this way:

//signature void someFunction(SDATUM datum); void someFunctionWrapper(SDATUM datum){ pin_ptr<SDATUM> datum_pin=&datum; //::SDATUM refers to the C-Type someFunction(*(::SDATUM*)datum_pin); }

我对其进行了测试，因为两个SDATUM结构都具有相同的位结构，所以它可以工作.因为我只打电话 简短的本地函数，我认为碎片是没有问题的.

I tested it and it works because both SDATUM Structs have the same bit structure. Because I only call short native functions I think fragmentation is no problem.