Can't get custom allocation function to work

["kathrin_69@..." <kathrin_69@...>]

Hi,

I'm trying to replace the Lua default l_alloc function with my own one. 
My aim is to have all memory Lua allocates inside a single array of 
pre-allocated memory.

I've tried different implementations of a custom function with less and 
less features. None of that worked (the library functions crashed due to 
memory access error after a time).

Now I tried the very simplest version of a custom function I could come 
up with. It just allocs and returns the memory asked for. It doesn't 
care about freeing of memory, re-allocation, corruption checks, 
fragmentation or anything else.


void* alloc_impl_manual( void* ptr, size_t osize, size_t nsize )
{
  if (nsize)
  {
      std::vector<unsigned char>* mem = new std::vector<unsigned 
char>(nsize);
               //yes, it will leak. don't care for now

      return &(*mem)[0]; //returned memory position should be aligned 
by new
  }
  return NULL;
}



The problems/crashes remains.
I must do some fundamental error or understand some detail wrong. Any 
Ideas?

Thank you in advance!

Regards
Joerg