int test_scen2_workerL(void *OS_UNUSED(param))
{
int ret;
/* take the ownership of mutex, as we would be owner of mtx H should boost
* our prio during their lock for mtx */
ret = os_mtx_lock(&test_mtx[0]);
test_assert(0 == ret);
/* now signalize/wake up the H and M */
/* following call will cause context switch to H and prio boost of this task
**/
os_sem_up(&test_sem[0]);
/* once H will call os_mtx_lock we will return here (since it will block on
* mtx). Since now we have effective prio equal to H (prio boost) following
* call should not cause context switch to M */
os_sem_up(&test_sem[1]);
/* unlock the mtx and reset the effective prio of this task to L
* following call should switch context to H which ten will finish (exit the
* task function). This should then cause context switch to M, which will
* verify values in test_atomic[0] and also exit the task function. */
os_mtx_unlock(&test_mtx[0]);
/* finally after yet another context switch we should return here
* verify that M finished task function */
test_assert(2 == test_atomic[0]);
return 0;
}
static FFTW_WORKER worker(void *arg)
{
struct worker *ego = (struct worker *)arg;
struct work *w;
for (;;) {
/* wait until work becomes available */
os_sem_down(&ego->ready);
w = ego->w;
/* !w->proc ==> terminate worker */
if (!w->proc) break;
/* do the work */
w->proc(&w->d);
/* signal that work is done */
os_sem_up(&ego->done);
}
/* termination protocol */
os_sem_up(&termination_semaphore);
os_destroy_thread();
/* UNREACHABLE */
return 0;
}
int test_scen4_workerL(void *OS_UNUSED(param))
{
int ret;
test_assert(0 == test_atomic[0]);
test_atomic[0] = 1;
/* lock mtx0 and mtx1 */
ret = os_mtx_lock(&test_mtx[0]);
test_assert(0 == ret);
ret = os_mtx_lock(&test_mtx[1]);
test_assert(0 == ret);
test_assert(1 == test_atomic[0]);
test_atomic[0] = 2;
/* switch context to M */
os_sem_up(&test_sem[0]);
/* we will return from M */
test_assert(4 == test_atomic[0]);
test_atomic[0] = 5;
/* switch context to HM */
os_sem_up(&test_sem[1]);
/* we will return from HM */
test_assert(6 == test_atomic[0]);
test_atomic[0] = 7;
/* switch context to H */
os_sem_up(&test_sem[2]);
/* we will return from H */
test_assert(8 == test_atomic[0]);
test_atomic[0] = 9;
/* unlock mtx1, this should not cause switch to HM since we still holds mtx0
* on which M is blocked which in turn holds mtx2 on which H is blocked. So
* following call should not make context switch since L should remain on
* boosted prio = p(H) */
os_mtx_unlock(&test_mtx[1]);
test_assert(9 == test_atomic[0]);
test_atomic[0] = 10;
/* the effective priority of this task should still be on H level */
test_assert(4 == task_worker[3].prio_current);
/* unlock mtx0, there should be context switch to M */
os_mtx_unlock(&test_mtx[0]);
/* we should switch from M */
test_assert(17 == test_atomic[0]);
test_atomic[0] = 18;
return 0;
}
int test_scen3_workerL(void *OS_UNUSED(param))
{
int ret;
test_assert(0 == test_atomic[0]);
test_atomic[0] = 1;
/* lock mtx1 */
ret = os_mtx_lock(&test_mtx[1]);
test_assert(0 == ret);
test_assert(1 == test_atomic[0]);
test_atomic[0] = 2;
/* switch context to LM */
os_sem_up(&test_sem[1]);
/* we will return here when LM will lock on mtx1 */
test_assert(4 == test_atomic[0]);
test_atomic[0] = 5;
/* also this means that L should now have p(LM) */
test_assert(2 == task_worker[3].prio_current);
/* switch context to LM */
os_sem_up(&test_sem[0]);
/* we will return here when H will lock on mtx1 */
test_assert(6 == test_atomic[0]);
test_atomic[0] = 7;
/* also this means that L should now have p(H) and LM also should have p(H)
**/
test_assert(4 == task_worker[2].prio_current);
test_assert(4 == task_worker[3].prio_current);
/* try to woke up the M but this should not cause context switch */
os_sem_up(&test_sem[0]);
test_assert(7 == test_atomic[0]);
test_atomic[0] = 8;
/* release mtx2, whis should cause switch to LM */
os_mtx_unlock(&test_mtx[1]);
/* we will return here when all task will finish */
test_assert(13 == test_atomic[0]);
test_atomic[0] = 14;
/* also this means that L should now have original prio */
test_assert(1 == task_worker[3].prio_current);
return 0;
}
/**
* test procedure for test1 task2
*/
int test1_task_proc2(void *OS_UNUSED(param))
{
int ret;
/* wait until timeout - (if still exist the bug will not update the priomax
* while wakup by timeout) */
ret = os_sem_down(&(worker_tasks[0].sem), 10);
test_assert(OS_TIMEOUT == ret);
/* signalize the same sem to wake up the task1 */
os_sem_up(&(worker_tasks[0].sem));
return 0;
}
int task_proc(void* param)
{
int ret;
unsigned idx = (unsigned)(size_t)param;
while(task_data[idx].loop < TEST_CYCLES)
{
++(task_data[idx].loop);
os_sem_up(&(task_data[(idx + 1) % 2].sem));
ret = os_sem_down(&(task_data[idx].sem), OS_TIMEOUT_INFINITE);
test_assert(0 == ret);
}
return 0;
}
int test_scen6_workerM(void *OS_UNUSED(param))
{
int ret;
/* block on sem, allow L to progress */
ret = os_sem_down(&test_sem[0], OS_TIMEOUT_INFINITE);
test_assert(0 == ret);
test_assert(2 == test_atomic[0]);
test_atomic[0] = 3;
/* switch context to H */
os_sem_up(&test_sem[1]);
/* finish test */
test_assert(7 == test_atomic[0]);
test_atomic[0] = 8;
return 0;
}
int test_scen6_workerL(void *OS_UNUSED(param))
{
int ret;
test_assert(0 == test_atomic[0]);
test_atomic[0] = 1;
/* lock mtx0 and mtx1 */
ret = os_mtx_lock(&test_mtx[0]);
test_assert(0 == ret);
ret = os_mtx_lock(&test_mtx[1]);
test_assert(0 == ret);
test_assert(1 == test_atomic[0]);
test_atomic[0] = 2;
/* switch context to M */
os_sem_up(&test_sem[0]);
/* we will return from H */
test_assert(4 == test_atomic[0]);
test_atomic[0] = 5;
/* unlock mtx0 we want to release mtx in the same order as we lock them (not
* reverse order), in properly implemented priority inversion this should
* wake up the task H since nothing more block it from running This is
* allowed since mutex does not enforce any locking sequence. User should
* prevent from making deadlock possible */
os_mtx_unlock(&test_mtx[0]);
test_assert(8 == test_atomic[0]);
test_atomic[0] = 9;
/* finish test */
os_mtx_unlock(&test_mtx[1]);
test_assert(9 == test_atomic[0]);
test_atomic[0] = 10;
return 0;
}
int test_scen5_workerL(void *OS_UNUSED(param))
{
int ret;
test_assert(0 == test_atomic[0]);
test_atomic[0] = 1;
/* lock mtx0 and mtx1 */
ret = os_mtx_lock(&test_mtx[0]);
test_assert(0 == ret);
ret = os_mtx_lock(&test_mtx[1]);
test_assert(0 == ret);
test_assert(1 == test_atomic[0]);
test_atomic[0] = 2;
/* switch context to M */
os_sem_up(&test_sem[0]);
/* we will return from H */
test_assert(4 == test_atomic[0]);
test_atomic[0] = 5;
/* unlock mtx1. In properly implemented priority inversion this should wake
* up the task H since nothing more block it from running */
os_mtx_unlock(&test_mtx[1]);
test_assert(8 == test_atomic[0]);
test_atomic[0] = 9;
/* finish test */
os_mtx_unlock(&test_mtx[0]);
test_assert(9 == test_atomic[0]);
test_atomic[0] = 10;
return 0;
}