Function plock_add

dpdk/app/test/test_barrier.c:121–128

* grab the lock, update both counters, release the lock. */

 * grab the lock, update both counters, release the lock.
 */
static void
plock_add(struct plock_test *pt, uint32_t self, uint32_t n)
{
	plock_lock(&pt->lock, self);
	pt->iter++;
	pt->val += n;
	plock_unlock(&pt->lock, self);
}

static int
plock_test1_lcore(void *data)