xrealloc

#include <stdlib.h>

void xhuge *realloc (
  void xhuge *p,           /* previously allocated block */
  unsigned long size);     /* new size for block */

The xrealloc 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

The xrealloc 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.

xcalloc, xfree, xinit_mempool, xmalloc

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

void tst_realloc (void) {
  void xhuge *p;
  void xhuge *new_p;

  p = xmalloc (100);

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

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