void
bqueue_dequeue_wait(bounded_queue_t q, void **data, sched_task_t stask)
{
for (int i = 0; i < 32; i++)
{
if(queue_impl_dequeue(q->impl, data))
{
task_mutex_lock(q->not_full_mutex, stask);
task_condition_signal_all(q->not_full, stask);
task_mutex_unlock(q->not_full_mutex, stask);
return;
}
}
if (!queue_impl_dequeue(q->impl, data))
{
task_mutex_lock(q->not_empty_mutex, stask);
while (!queue_impl_dequeue(q->impl, data))
{
DEBUG_LOG(2, "%p waiting to dequeue in %p\n", stask, q);
task_condition_wait(q->not_empty, q->not_empty_mutex, stask);
}
/* task_condition_signal(q->not_empty); */
task_mutex_unlock(q->not_empty_mutex, stask);
}
DEBUG_LOG(2, "%p bounded queue notifying not full %p\n", stask, q);
task_mutex_lock(q->not_full_mutex, stask);
task_condition_signal_all(q->not_full, stask);
task_mutex_unlock(q->not_full_mutex, stask);
}
void
proc_wait_for_available(processor_t proc, processor_t client)
{
task_mutex_lock(proc->mutex, &client->stask);
proc->last_waiter = client;
while (proc->last_waiter == client)
{
task_condition_wait(proc->cv, proc->mutex, &client->stask);
}
task_mutex_unlock(proc->mutex, &client->stask);
}
void
mutex_task(void* data)
{
sched_task_t stask = (sched_task_t) data;
for (int i = 0; i < NUM_ITERS; i++)
{
task_mutex_lock(mutex, stask);
finished++;
task_mutex_unlock(mutex, stask);
}
}
void
worker_task(sched_task_t stask, int flag)
{
for (int i = 0; i < NUM_ITERS; i++)
{
task_mutex_lock(mutex, stask);
while (finished % 2 == flag)
{
task_condition_wait(cv, mutex, stask);
}
finished++;
task_condition_signal_all(cv, stask);
task_mutex_unlock(mutex, stask);
}
}
void Task50(void)
{
int rv;
/* Wait for private mutex to be released */
rv = task_mutex_lock(private_mutex, TICKS_UNLIMITED);
if (rv != RC_OK) {
tcRC = TC_FAIL;
TC_ERROR("Failed to obtain private mutex\n");
return;
}
/* Wait a bit, then release the mutex */
task_sleep(HALF_SECOND);
task_mutex_unlock(private_mutex);
} /* Task50 */
static
void
notify_available(processor_t proc)
{
// If we're processing a wait condition, then we don't want to
// notify any other threads that this processor is available,
// because here availability means:
//
// This processor might have undergone a state change so
// check your wait-condition again.
//
// This is designed to prevent wait conditions from waking up other
// wait conditions.
/* if (!proc->processing_wait) */
/* { */
task_mutex_lock(proc->mutex, &proc->stask);
proc->last_waiter = NULL;
task_condition_signal_all(proc->cv, &proc->stask);
task_mutex_unlock(proc->mutex, &proc->stask);
/* } */
/* proc->processing_wait = false; */
}
