Method wait_with_mutex

os/src/sync/condvar.rs:50–57

(&self, mutex: Arc<dyn Mutex>)

    }

    pub fn wait_with_mutex(&self, mutex: Arc<dyn Mutex>) {
        mutex.unlock();
        self.inner.exclusive_session(|inner| {
            inner.wait_queue.push_back(current_task().unwrap());
        });
        block_current_and_run_next();
        mutex.lock();
    }
}