Function rte_mempool_populate_anon

dpdk/lib/mempool/rte_mempool.c:661–712

populate the mempool with an anonymous mapping */

/* populate the mempool with an anonymous mapping */
int
rte_mempool_populate_anon(struct rte_mempool *mp)
{
	ssize_t size;
	int ret;
	char *addr;

	/* mempool is already populated, error */
	if ((!STAILQ_EMPTY(&mp->mem_list)) || mp->nb_mem_chunks != 0) {
		rte_errno = EINVAL;
		return 0;
	}

	ret = mempool_ops_alloc_once(mp);
	if (ret < 0) {
		rte_errno = -ret;
		return 0;
	}

	size = get_anon_size(mp);
	if (size < 0) {
		rte_errno = -size;
		return 0;
	}

	/* get chunk of virtually continuous memory */
	addr = rte_mem_map(NULL, size, RTE_PROT_READ | RTE_PROT_WRITE,
		RTE_MAP_SHARED | RTE_MAP_ANONYMOUS, -1, 0);
	if (addr == NULL)
		return 0;
	/* can't use MMAP_LOCKED, it does not exist on BSD */
	if (rte_mem_lock(addr, size) < 0) {
		rte_mem_unmap(addr, size);
		return 0;
	}

	ret = rte_mempool_populate_virt(mp, addr, size, rte_mem_page_size(),
		rte_mempool_memchunk_anon_free, addr);
	if (ret == 0) /* should not happen */
		ret = -ENOBUFS;
	if (ret < 0) {
		rte_errno = -ret;
		goto fail;
	}

	rte_mempool_trace_populate_anon(mp);
	return mp->populated_size;

 fail:
	rte_mempool_free_memchunks(mp);
	return 0;
}

/* free a mempool */
void