Function rte_realloc_socket

dpdk/lib/eal/common/rte_malloc.c:164–210

* Resize allocated memory on specified heap. */

 * Resize allocated memory on specified heap.
 */
void *
rte_realloc_socket(void *ptr, size_t size, unsigned int align, int socket)
{
	size_t user_size;

	if (ptr == NULL)
		return rte_malloc_socket(NULL, size, align, socket);

	struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (elem == NULL) {
		RTE_LOG(ERR, EAL, "Error: memory corruption detected\n");
		return NULL;
	}

	user_size = size;

	size = RTE_CACHE_LINE_ROUNDUP(size), align = RTE_CACHE_LINE_ROUNDUP(align);

	/* check requested socket id and alignment matches first, and if ok,
	 * see if we can resize block
	 */
	if ((socket == SOCKET_ID_ANY ||
	     (unsigned int)socket == elem->heap->socket_id) &&
			RTE_PTR_ALIGN(ptr, align) == ptr &&
			malloc_heap_resize(elem, size) == 0) {
		rte_eal_trace_mem_realloc(size, align, socket, ptr);

		asan_set_redzone(elem, user_size);

		return ptr;
	}

	/* either requested socket id doesn't match, alignment is off
	 * or we have no room to expand,
	 * so move the data.
	 */
	void *new_ptr = rte_malloc_socket(NULL, size, align, socket);
	if (new_ptr == NULL)
		return NULL;
	/* elem: |pad|data_elem|data|trailer| */
	const size_t old_size = old_malloc_size(elem);
	rte_memcpy(new_ptr, ptr, old_size < size ? old_size : size);
	rte_free(ptr);

	rte_eal_trace_mem_realloc(size, align, socket, new_ptr);
	return new_ptr;
}

/*
 * Resize allocated memory.