static int semaphore1_do_test(struct vmm_chardev *cdev)
{
int rc, failures = 0;
/* Initialize semaphores */
INIT_SEMAPHORE(&s1, 1, 1);
INIT_SEMAPHORE(&s2, 1, 0);
/* s1 semaphore should be available */
if (!vmm_semaphore_avail(&s1)) {
failures++;
}
/* s2 semaphore should not be available */
if (vmm_semaphore_avail(&s2)) {
failures++;
}
/* Acquire s1 semaphore */
rc = vmm_semaphore_down(&s1);
if (rc) {
return rc;
}
/* Start workers */
vmm_threads_start(workers[0]);
/* Wait for worker0 block on s1 semaphore */
vmm_msleep(SLEEP_MSECS * 10);
/* s2 semaphore should not be available */
if (vmm_semaphore_avail(&s2)) {
failures++;
}
/* Release s1 semaphore */
rc = vmm_semaphore_up(&s1);
if (rc) {
return rc;
}
/* Wait for worker0 wakeup and release s2 semaphore */
vmm_msleep(SLEEP_MSECS * 10);
/* s2 semaphore should be available */
if (!vmm_semaphore_avail(&s2)) {
failures++;
}
/* Stop workers */
vmm_threads_stop(workers[0]);
return (failures) ? VMM_EFAIL : 0;
}
static int mutex9_do_test(struct vmm_chardev *cdev)
{
u64 i, timeout, etimeout, tstamp;
int rc, failures = 0;
/* Initialise the shared_data to zero */
shared_data = 0;
/* Start worker */
vmm_threads_start(workers[0]);
/*
* The worker thread has now been started and should take ownership
* of the mutex. We wait a while and check that shared_data has been
* modified, which proves to us that the thread has taken the mutex.
*/
vmm_msleep(SLEEP_MSECS*10);
/* Check shared data. It should be one. */
if (shared_data != 1) {
vmm_cprintf(cdev, "error: shared data unmodified\n");
failures++;
}
/* Try mutex lock with timeout few times */
for (i = 1; i <= 10; i++) {
/* Save current timestamp */
tstamp = vmm_timer_timestamp();
/* Lock mutex with timeout */
etimeout = i * SLEEP_MSECS * 1000000ULL;
timeout = etimeout;
rc = vmm_mutex_lock_timeout(&mutex1, &timeout);
if (rc != VMM_ETIMEDOUT) {
vmm_cprintf(cdev, "error: did not timeout\n");
failures++;
}
/* Check elapsed time */
tstamp = vmm_timer_timestamp() - tstamp;
if (tstamp < etimeout) {
vmm_cprintf(cdev, "error: time elapsed %"PRIu64
" nanosecs instead of %"PRIu64" nanosecs",
tstamp, etimeout);
failures++;
}
}
/* Stop worker thread. */
vmm_threads_stop(workers[0]);
return (failures) ? VMM_EFAIL : 0;
}
static int mutex4_do_test(struct vmm_chardev *cdev)
{
int done_count = 0;
/* Initialize work done completion */
INIT_COMPLETION(&work_done);
/* Acquire mutex1 */
vmm_mutex_lock(&mutex1);
/* Start workers */
vmm_threads_start(workers[0]);
vmm_threads_start(workers[1]);
vmm_threads_start(workers[2]);
vmm_threads_start(workers[3]);
vmm_msleep(SLEEP_MSECS*40);
/* Release mutex1 */
vmm_mutex_unlock(&mutex1);
/* Wait for workers to complete */
do {
if (done_count == NUM_THREADS) {
break;
}
vmm_completion_wait(&work_done);
done_count++;
} while (1);
/* Stop workers */
vmm_threads_stop(workers[3]);
vmm_threads_stop(workers[2]);
vmm_threads_stop(workers[1]);
vmm_threads_stop(workers[0]);
return 0;
}
static int mutex7_do_test(struct vmm_chardev *cdev)
{
int rc, failures = 0;
/* Initialise the shared_data to zero */
shared_data = 0;
/* Attempt to release the mutex when not owned by any thread */
rc = vmm_mutex_unlock(&mutex1);
if (rc == VMM_OK) {
vmm_cprintf(cdev, "error: unlocking mutex worked\n");
failures++;
}
/* Start worker */
vmm_threads_start(workers[0]);
/*
* The worker thread has now been started and should take ownership
* of the mutex. We wait a while and check that shared_data has been
* modified, which proves to us that the thread has taken the mutex.
*/
vmm_msleep(SLEEP_MSECS*10);
/* Attempt to release the mutex when owned by worker thread */
rc = vmm_mutex_unlock(&mutex1);
if (rc == VMM_OK) {
vmm_cprintf(cdev, "error: unlocking mutex worked\n");
failures++;
}
/* Stop worker thread */
vmm_threads_stop(workers[0]);
return (failures) ? VMM_EFAIL : 0;
}
static void daemon_mterm_exit(void)
{
vmm_threads_stop(mtctrl.thread);
vmm_threads_destroy(mtctrl.thread);
}