bool synchronized_await(Mutex& mtx, CondVar& cv, const TimePoint& timeout) {
CAF_ASSERT(!closed());
if (try_block()) {
std::unique_lock<Mutex> guard(mtx);
while (blocked()) {
if (cv.wait_until(guard, timeout) == std::cv_status::timeout) {
// if we're unable to set the queue from blocked to empty,
// than there's a new element in the list
return !try_unblock();
}
}
}
return true;
}
