[Dev-C++] Crash with macro to template conversion

[David M. <ci...@ya...>]

Ok here is my problem.

I want to replace:
#define CREATE(result, type, number)                \
do                              \
{                               \
    if (!((result) = (type *) calloc ((number), sizeof(type)))) \
    {                               \
    perror("malloc failure");               \
    fprintf(stderr, "Malloc failure @ %s:%d\n", __FILE__, __LINE__ );
\
    abort();                        \
    }                               \
} while(0)

With it's C++ equivalent.

So far I have:
#define CREATE(result, type, num)   = create<type>((result),(num))
template<class T>
void create(T * ptr, int number, char * f_name = __FILE__, int l_num
=
__LINE__)
{
  try {
    ptr = new T[number];
  }
  catch(bad_alloc& b)
  {
    perror("malloc failure");
    fprintf( stderr, "Malloc failure @ %s:%d\n", f_name, l_num );
    abort();
  }
  if ( !ptr )
  {
    perror("malloc failure");
    fprintf( stderr, "Malloc failure @ %s:%d\n", f_name, l_num );
    abort();
  }
  return ptr;
}

But the program crashes after the function call when any attempt to
acces
the data occours:
e.g.
OBJ_DATA * obj;
CREATE( obj , OBJ_DATA, 1 );

obj->some_field = 5; //Crashes here and obj = 0x0 from gdb.

Thanks in Advance
David McKen


__________________________________
Do you Yahoo!?
Get better spam protection with Yahoo! Mail.
http://antispam.yahoo.com/tools