Function wakeup_task

os/src/task/manager.rs:37–42

(task: Arc<TaskControlBlock>)

}

pub fn wakeup_task(task: Arc<TaskControlBlock>) {
    let mut task_inner = task.inner_exclusive_access();
    task_inner.task_status = TaskStatus::Ready;
    drop(task_inner);
    add_task(task);
}

pub fn fetch_task() -> Option<Arc<TaskControlBlock>> {
    TASK_MANAGER.exclusive_access().fetch()