C ++ virtual table error?

Question

I have the following structure:

//Unmanaged(.h)
class myInterface
{
public:
   virtual bool Send(char* myChar);
}

//Managed (.h)
class myClass;

public ref class Parser
{
   bool Transmit(String^ mString);
}

class myClass : public myInterface
{
public:
   virtual bool Send(char* myChar);
private:
   gcroot<Parser^> pParser;
}

My problem is that somewhere in my unmanaged code I have to call the send function. It calls a function from the sent managed code, but the Send function calls the transfer method from the Parser class. The problem is that when I debug, the pParser instance is empty (even if I already created it earlier in the constructor).

Is this a garbage collector or erroneous virtual table problem? How can I fix it? Thank!

UPDATE: After some additional debugging, I realized that if I included other instances of gcroot, for example:

gcroot<AppDomaion^> pDomain;

and then in code I tried to execute:

pDomain = AppDomain::CurrentDomain;

The debugger will show the same empty value as for pParser. Is there something wrong with what I'm doing? Should I create an instance of the class differently?

UPDATE2:

/ :

: (wrapper.h)

public ref class Wrapper
{
public:
   Send(String^ mSendMessage);
   Parse(String^ mMessageString);
...
private:
   ComLayer* mComm;
   CInferface mInterface;
};

private class CInterface : public IIterface
{
public:
   virtual bool Deliver(CMessage mMessage);
...
private:
   gcroot<Wrapper^> mParent;
};

(wrapper.cpp)

Wrapper::Send(String^ mSendMessage)
{
...
mComm->Send(mMessage);
}
Wrapper::Parse(String^ mMessageString)
{
...
}

CInterface::Deliver(CMessage* mMessage)
{
...
//Here, mParent value is empty under Labview, not while Debug/VS/WindowsForm
mParent->Parse(mMessageString)
}

: (commLayer.h)

class CommLayer
{
public:
//Send:
   bool Send(CMessage* mMessage);
...
private:
//instead of CInterface, IInterface.
   IInterface mInterface;
};

: (IInterface.h)

class IInterface
{
public:
//Response:
   virtual bool Deliver(CMessage mMessage);
};

, mInferface- > Deliver (mMessage); mParent . Wrapper mParent (value = null); IInterface, Wrapper ^ CInterface.

Answer 1

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