Function allocate_dynamic

mysys/array.c:270–304

*/

my_bool allocate_dynamic(DYNAMIC_ARRAY *array, size_t max_elements)
{
  DBUG_ENTER("allocate_dynamic");

  if (max_elements >= array->max_element)
  {
    size_t size;
    uchar *new_ptr;
    size= (max_elements + array->alloc_increment)/array->alloc_increment;
    size*= array->alloc_increment;
    if (array->malloc_flags & MY_INIT_BUFFER_USED)
    {
       /*
         In this scenario, the buffer is statically preallocated,
         so we have to create an all-new malloc since we overflowed
       */
       if (!(new_ptr= (uchar *) my_malloc(array->m_psi_key, size *
                                          array->size_of_element,
                                          MYF(array->malloc_flags | MY_WME))))
         DBUG_RETURN(TRUE);
       memcpy(new_ptr, array->buffer,
              array->elements * array->size_of_element);
       array->malloc_flags&= ~MY_INIT_BUFFER_USED;
    }
    else if (!(new_ptr= (uchar*) my_realloc(array->m_psi_key,
                                            array->buffer,size *
                                            array->size_of_element,
                                            MYF(MY_WME | MY_ALLOW_ZERO_PTR |
                                                array->malloc_flags))))
      DBUG_RETURN(TRUE);
    array->buffer= new_ptr;
    array->max_element= size;
  }
  DBUG_RETURN(FALSE);
}


/*