Overloading the __huge new Operator

The information in this article applies to:

• Microsoft Visual C++ for Windows, version 1.0

When an application overloads the __huge version of operator new with C/C++ version 8.0 for MS-DOS, you must verify that the declaration properly specifies two parameters.

Microsoft confirmed a problem using the __huge operator new in C/C++ version 7.0 for MS-DOS and documented the methods to work around the problem in the Microsoft Knowledge Base. For more information, please search on the following words:

   huge operator new

MORE INFORMATION

An operator new that returns a huge pointer acts like an array allocator. It has two parameters: the number of elements to allocate and the size of each element. If the total size of the array is greater than 128K, the size of each element must be a power of 2.

The correct declaration for the __huge version of operator new is as follows:

   void __huge *operator new(unsigned long elems, size_t size);

   Q111754: BUG: __Huge New Operator Fails with Variable Size

Sample Code

/*
 * Compiler options needed: /AL /Od /Zi
 */

#include <iostream.h>
#include <malloc.h>
#include <stdio.h>

void __huge *operator new(unsigned long num, size_t size);

void __huge *operator new(unsigned long num, size_t size)

   cout << "Inside __huge new\n";
   return _halloc(num, size);

void main()

   int __huge *h_ptr;

   h_ptr = new __huge int[10000L];
   if (h_ptr == NULL)
      cout << "Alloc failed\n";

   delete h_ptr;