#include <stdlib.h>

void far *realloc_b (
  void far *p,       /* previously allocated block */
  size_t size);      /* new size for block */

or

void huge *realloc_b (
  void huge *p,      /* previously allocated block */
  size_t size);      /* new size for block */

The realloc_b function changes the size of a previously allocated memory block. The p argument points to the allocated block and size specifies the new size for the block. The contents of the existing block are copied to the new block. Any additional area in the new block, due to a larger block size, is not initialized.

Note

• Source code for this routine is provide in the LIB folder. You may modify the source to customize this function for your particular hardware environment.
• Pointer arguments and return values are far in Small, Medium, Compact, and Large Memory Models and huge in HCompact, HLarge, and XLarge Memory Models. This function is not supported in the Tiny Memory Model.

The realloc_b function returns a pointer to the new block. If there is not enough memory in the memory pool to satisfy the memory request, a null pointer is returned and the original memory block is not affected.

calloc_b, free_b, init_mempool_b, malloc_b

#include <stdlib.h>
#include <stdio.h> /* for printf */

void tst_realloc_b (void) {
  void far *p;
  void far *new_p;

  p = malloc_b (100);

  if (p != NULL) {
    new_p = realloc_b (p, 200);

    if (new_p != NULL)
      p = new_p;
    else
      printf ("Reallocation failed\n");
  }
}