Function my_realloc

mysys/my_malloc.c:80–126

@brief wrapper around realloc() @param oldpoint pointer to currently allocated area @param size new size requested, must be >0 @param my_flags flags @note if size==0 realloc() may return NULL; my_realloc() treats this as an error which is not the intention of realloc() */

   error which is not the intention of realloc()
*/
void *my_realloc(void *oldpoint, size_t size, myf my_flags)
{
  void *point;
  DBUG_ENTER("my_realloc");
  DBUG_PRINT("my",("ptr: %p  size: %lu  my_flags: %d", oldpoint,
                   (ulong) size, my_flags));

  DBUG_ASSERT(size > 0);
  /* These flags are mutually exclusive. */
  DBUG_ASSERT(!((my_flags & MY_FREE_ON_ERROR) &&
                (my_flags & MY_HOLD_ON_ERROR)));
  DBUG_EXECUTE_IF("simulate_out_of_memory",
                  point= NULL;
                  goto end;);
  if (!oldpoint && (my_flags & MY_ALLOW_ZERO_PTR))
    DBUG_RETURN(my_malloc(size, my_flags));
#ifdef USE_HALLOC
  point= malloc(size);
#else
  point= realloc(oldpoint, size);
#endif
#ifndef DBUG_OFF
end:
#endif
  if (point == NULL)
  {
    if (my_flags & MY_HOLD_ON_ERROR)
      DBUG_RETURN(oldpoint);
    if (my_flags & MY_FREE_ON_ERROR)
      my_free(oldpoint);
    my_errno=errno;
    if (my_flags & (MY_FAE+MY_WME))
      my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ ME_WAITTANG + ME_FATALERROR),
               size);
    DBUG_EXECUTE_IF("simulate_out_of_memory",
                    DBUG_SET("-d,simulate_out_of_memory"););
  }
#ifdef USE_HALLOC
  else
  {
    memcpy(point,oldpoint,size);
    free(oldpoint);
  }
#endif
  DBUG_PRINT("exit",("ptr: %p", point));
  DBUG_RETURN(point);
}


/**