serialization of a complex object

19 Jul 2004

      Dear list,

I have tried many ways but could not figure out how to boost::serialize 
the following object:

Basically, to maintain a big chunk of small objects, I use a memory pool 
to allocate a big trunk of memory and return the pointers to small 
objects. 

struct small
{
  int size;
  int * ptr;
  init(int s, int* p){ size = s; ptr = p; }
}

struct All
{
  vector<int> data;
  vector<small> objs;
  All(int num_obj, int size_obj)
  {
    data.resize( num_obj * size_obj);
    for(int i=0; i<num_obj; i++)
      objs[i].init( size_obj, &data[i* size_obj]);
  }
}

It is easy to serialize All::data but how to deal with small::ptr is 
beyond me. I tried the following ways:

1.  in small     ar & size & ptr.    --- template expansion error.
2.  in small     ar & size & reinterpret_cast<unsigned int>ptr --- core 
    dump.

What I am trying to do in 2 is that in load(....), I want to
  ar & objs;   /// get the number of old pointer back.
  find the smallest number of objs[i].ptr
  relocate objs[i].ptr to &data[0] + objs[i].ptr - smallest point.

However, I can not do this in the load(...) function. The template 
expansion does not allow changes to objs (this does not make sense to me 
though).

3. ignore ptr   --- can compile, core dump.

Can someone give me a bit of insights how I can make things work?

Thanks.

Bo Peng

Bo Peng

Bo Peng

Jeff Garland

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