Function lock

dpdk/lib/eal/linux/eal_memalloc.c:213–232

returns 1 on successful lock, 0 on unsuccessful lock, -1 on error */

/* returns 1 on successful lock, 0 on unsuccessful lock, -1 on error */
static int lock(int fd, int type)
{
	int ret;

	/* flock may be interrupted */
	do {
		ret = flock(fd, type | LOCK_NB);
	} while (ret && errno == EINTR);

	if (ret && errno == EWOULDBLOCK) {
		/* couldn't lock */
		return 0;
	} else if (ret) {
		RTE_LOG(ERR, EAL, "%s(): error calling flock(): %s\n",
			__func__, strerror(errno));
		return -1;
	}
	/* lock was successful */
	return 1;
}

static int
get_seg_memfd(struct hugepage_info *hi __rte_unused,