Alien module structs

[webultra]

I have the following structs on C++ (h file):

struct CCount
    {
      unsigned long* countLines;
      int            numCountLines;
      int            maxLines;
      unsigned long  countTime;

      CCount()
      {
        countLines = NULL;
        numCountLines = 0;
        maxLines = 0;
        countTime = 0;
      }

      CCount(int nMaxLines)
      {
        countLines = new unsigned long[nMaxLines];
        numCountLines = 0;
        maxLines = nMaxLines;
        countTime = 0;
      }

      ~CCount()
      {
        delete[] countLines;
      }
    };
    struct CCounts
    {
      CCount* pCounts;
      int nCounts;
      int nMaxCounts;
      int nMaxLines;

      CCounts(int maxCounts, int maxLines)
      {
        pCounts = new CCount[maxCounts];
        for(int i=0; i<maxCounts; i++)
        {
          pCounts[i].countLines = new unsigned long[maxLines];
          pCounts[i].maxLines = maxLines;
        }
        nCounts = 0;
        nMaxCounts = maxCounts;
        nMaxLines = maxLines;
      }
      ~CCounts()
      {
        delete[] pCounts;
      }
    }; 

And, on the other side (lua) i'm using the alien module to define the structs like this:

CCounts = alien.defstruct{
  {'pCounts', 'pointer'},
  {'nCounts', 'int'},
  {'nMaxCounts', 'int'},
  {'nMaxLines', 'int'}
}

CCount = alien.defstruct{
  {'countLines', 'ulong'},
  {'numCountLines', 'int'},
  {'maxLines', 'int'},
  {'countTime', 'ulong'}
}; 

I know I can't define (for now) the default struct "__construct" callbacks (like setting default values for nMaxCounts, etc), so I'm doing it after create the struct object. My problem is at the "CCount" struct when I create a new "CCounts" struct, because I don't know how to replicate this callback:

pCounts = new CCount[maxCounts];
        for(int i=0; i<maxCounts; i++)
        {
          pCounts[i].countLines = new unsigned long[maxLines];
          pCounts[i].maxLines = maxLines;
        } 

The pCounts attribute is a CCount instance, and the for loop indicates that the CCount object is indexable. Should the CCount struct be different?