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原标题:Call c++ function pointer from c#

可能的话,就象这样说一个C(++)固定功能点(而不是代表)

typedef int (*MyCppFunc)(void* SomeObject);

页: 1

void CallFromCSharp(MyCppFunc funcptr, IntPtr param)
{
  funcptr(param);
}

我需要能够从C#向一些老的C++级退学。 C++管理起来,但是这些班级不改课。

到目前为止,我不知道如何从c#中调用一个C++功能点,这是可能的吗?

最佳回答

dtb是正确的。 这里是沼泽地的一个更详细的例子。 GetDelegateForFunctionPointer. 它应为你工作。

C++:

static int __stdcall SomeFunction(void* someObject, void*  someParam)
{
  CSomeClass* o = (CSomeClass*)someObject;
  return o->MemberFunction(someParam);
}

int main()
{
  CSomeClass o;
  void* p = 0;
  CSharp::Function(System::IntPtr(SomeFunction), System::IntPtr(&o), System::IntPtr(p));
}

C#:

public class CSharp
{
  delegate int CFuncDelegate(IntPtr Obj, IntPtr Arg);
  public static void Function(IntPtr CFunc, IntPtr Obj, IntPtr Arg)
  {
    CFuncDelegate func = (CFuncDelegate)Marshal.GetDelegateForFunctionPointer(CFunc, typeof(CFuncDelegate));
    int rc = func(Obj, Arg);
  }
}
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