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zdtm/maps007: remove spinlocks from the test

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Use futex for synchronization instead of spinning on atomic variables.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin 2014-02-25 18:04:18 +04:00 committed by Pavel Emelyanov
parent 8ce7ef75ec
commit e16f0976fc
1 changed files with 5 additions and 5 deletions
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10
test/zdtm/live/transition/maps007.c
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@ -80,13 +80,12 @@ int main(int argc, char **argv)
if (child) {
futex_wait_while_gt(&shm->delta, 2 * MAX_DELTA);
futex_inc(&shm->delta);
futex_inc_and_wake(&shm->delta);
} else {
if (!futex_get(&shm->stop))
/* MAX_DELTA steps behind the parent */
while (futex_get(&shm->delta) < MAX_DELTA &&
!futex_get(&shm->stop));
else if (atomic_get(&shm->delta) == 0)
futex_wait_while_lt(&shm->delta, MAX_DELTA);
if (futex_get(&shm->stop) && atomic_get(&shm->delta) == MAX_DELTA)
break;
futex_dec_and_wake(&shm->delta);
}
@ -130,6 +129,7 @@ int main(int argc, char **argv)
/* stop the child */
futex_set(&shm->stop, 1);
futex_add_and_wake(&shm->delta, MAX_DELTA);
/* wait until the child will be in the same point */
futex_wait_until(&shm->stop, 2);