Struct os::task::TaskManager

pub struct TaskManager {
    num_app: usize,
    inner: UPSafeCell<TaskManagerInner>,
}

Fields

num_app: usize

total number of tasks

inner: UPSafeCell<TaskManagerInner>

use inner value to get mutable access

Implementations

impl TaskManager

fn run_first_task(&self) -> !

Run the first task in task list.

Generally, the first task in task list is an idle task (we call it zero process later). But in ch3, we load apps statically, so the first task is a real app.

fn mark_current_suspended(&self)

Change the status of current Running task into Ready.

fn mark_current_exited(&self)

Change the status of current Running task into Exited.

fn find_next_task(&self) -> Option<usize>

Find next task to run and return app id.

In this case, we only return the first Ready task in task list.

fn run_next_task(&self)

Switch current Running task to the task we have found, or there is no Ready task and we can exit with all applications completed