C / C++ / MFC

li zhiyuan wrote:

...anyone can list what i can check step by step for this issue?

George_George wrote:

But why do we sometimes need to call release method on auto_ptr to go back to the style of manual management?

void producer::loop()
{
   while (!exitEvent())
   {
      auto_ptr<data> pi(produce());
      if (waitForExitorConsumeEvent())
      {
         if(ConsumeEvent())
         {
          consumer.consume(pi.release()) 
          // get the object from auto_ptr without deleting it
          // consumer will take care of deleting it
          // otherwise autoptr
         }
      }
   }
}

auto_ptr<data> pi(produce());
</data>

George_George wrote:

So, the function produce returns an object on heap?

int EXPORT CMyClass::nValue = 0;

Prasanth M V wrote:

Unfortunately that thread lost, i do not how that happend.

#ifdef CPPDLL_EXPORTS
#define CPPDLL_API __declspec(dllexport)
#else
#define CPPDLL_API __declspec(dllimport)
#endif

class CPPDLL_API CCppDll {
public:
	CCppDll(void);
	~CCppDll(void);
	// TODO: add your methods here.

	static int nValue;
};

// DLLMain stuff omitted
CCppDll::CCppDll()
{
	return;
}
CCppDll::~CCppDll()
{
	return;
}
int CCppDll::nValue = 0;

#include "stdafx.h"
#include "..\\..\\CppDLL\\CppDLL\CppDLL.h"

int _tmain(int argc, _TCHAR* argv[])
{
	CCppDll::nValue =5;
}