xref: /DragonOS/kernel/src/sched/idle.rs (revision 9fab312ea9921618629924ab15c28c2d255b21c6)
1 use super::Scheduler;
2 
3 pub struct IdleScheduler;
4 
5 impl Scheduler for IdleScheduler {
6     fn enqueue(
7         _rq: &mut super::CpuRunQueue,
8         _pcb: alloc::sync::Arc<crate::process::ProcessControlBlock>,
9         _flags: super::EnqueueFlag,
10     ) {
11         // idle已经被设置,无需入队
12     }
13 
14     fn dequeue(
15         _rq: &mut super::CpuRunQueue,
16         _pcb: alloc::sync::Arc<crate::process::ProcessControlBlock>,
17         _flags: super::DequeueFlag,
18     ) {
19     }
20 
21     fn yield_task(_rq: &mut super::CpuRunQueue) {}
22 
23     fn check_preempt_currnet(
24         rq: &mut super::CpuRunQueue,
25         _pcb: &alloc::sync::Arc<crate::process::ProcessControlBlock>,
26         _flags: super::WakeupFlags,
27     ) {
28         rq.resched_current();
29     }
30 
31     fn pick_task(
32         _rq: &mut super::CpuRunQueue,
33     ) -> Option<alloc::sync::Arc<crate::process::ProcessControlBlock>> {
34         panic!()
35     }
36 
37     /// ### 表示idle被选中
38     ///
39     /// 主要做一些统计工作
40     fn pick_next_task(
41         _rq: &mut super::CpuRunQueue,
42         _pcb: Option<alloc::sync::Arc<crate::process::ProcessControlBlock>>,
43     ) -> Option<alloc::sync::Arc<crate::process::ProcessControlBlock>> {
44         // TODO: Fixme
45         // 做一些统计工作
46         None
47     }
48 
49     fn tick(
50         _rq: &mut super::CpuRunQueue,
51         _pcb: alloc::sync::Arc<crate::process::ProcessControlBlock>,
52         _queued: bool,
53     ) {
54         // Nothing to do
55     }
56 
57     fn task_fork(_pcb: alloc::sync::Arc<crate::process::ProcessControlBlock>) {
58         todo!()
59     }
60 
61     fn put_prev_task(
62         _rq: &mut super::CpuRunQueue,
63         _prev: alloc::sync::Arc<crate::process::ProcessControlBlock>,
64     ) {
65         // Nothing todo
66     }
67 }
68