本机C ++类上的C ++/CLI混合模式和__cdecl调用约定

问题描述

我想在C ++/CLI中的CLR应用程序中使用DLL中的本机C ++类.我想为该类的所有函数显式设置__cdecl调用约定，以便CLR应用程序不使用CLR的默认__clr调用约定来调用成员函数.通过将__cdecl放在头文件中的成员函数名称之前，将类转换为__cdecl调用约定.但是我看不到用类的构造函数/析构函数来做到这一点.如果我尝试将__cdecl放在构造函数或析构函数名称之前，则会出现编译器错误.如果不告诉CLR应用程序实例化该类的对象，并使用__cdecl调用约定将参数传递给该实例化对象，则该应用程序似乎无法正常工作.如何告诉CLR应用程序该类的构造函数/析构函数也使用__cdecl调用约定?

I have a native C++ class in a DLL which I want to use form a CLR application in C++/CLI. I want to explicitly set the __cdecl calling convention for all functions of the class so that the CLR application does not call the member functions using the default __clr calling convention for CLR.

I can explicitly set all the functions of the class to the __cdecl calling convention by putting __cdecl before the member function name in the header file. But I see no way to do this with the constructor/destructor of the class. If I attempt to put __cdecl before the constructor or destructor name, i get a compiler error. Without telling the CLR application to instantiate an object of the class and pass parameters to that instantiated object using the __cdecl calling convention, it would seem that the application would not work correctly. How can I tell the CLR application that the constructor/destructor of the class also uses the __cdecl calling convention ?

推荐答案

使用命名空间系统；

#pragma非托管

class \ NativeClass

{

私人:

int a;

char b;

public:

NativeClass():a(0)，b(0)

.{

〜NativeClass()

.{

int geta()

.{

返回a;

}

voidseta(int na)

{

a == na ;

char getb()

.{

返回b;

}

void setb(char nb)

{

b == nb ;

};

#pragma管理的

int main(array < System :: String ^ > ^ args)

{

NativeClass myclass;

myclass.seta(19);

控制台:: WriteLine("{0}"，myclass.geta());

返回0;

}

using namespace System;

#pragma unmanaged

class NativeClass

{

private:

int a;

char b;

public:

NativeClass() : a(0), b(0)

{

}

~NativeClass()

{

}

int geta()

{

return a;

}

void seta(int na)

{

a = na;

}

char getb()

{

return b;

}

void setb(char nb)

{

b = nb;

}

};

#pragma managed

int main(array<System::String ^> ^args)

{

NativeClass myclass;

myclass.seta(19);

Console::WriteLine("{0}", myclass.geta());

return 0;

}

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