proc: basic infra for multithreading

including task and scheduler wrapper, context swap assembly, and some
notes... The lifetime of task is tricky, I'll fix it later

Signed-off-by: Tianhao Wang <shrik3@mailbox.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/proc/sched.rs b/src/proc/sched.rs
new file mode 100644
index 0000000..8e86c7f
--- /dev/null
+++ b/src/proc/sched.rs
@@ -0,0 +1,17 @@
+use crate::proc::task::*;
+use alloc::collections::linked_list::LinkedList;
+// TODO the lifetime here is pretty much broken. Fix this later
+pub struct Scheduler<'a> {
+	run_list: LinkedList<&'a Task>,
+}
+
+impl<'a> Scheduler<'a> {
+	#[inline]
+	pub fn pop_front(&mut self) -> Option<&Task> {
+		self.run_list.pop_front()
+	}
+	#[inline]
+	pub fn push_back(&mut self, t: &'a Task) {
+		self.run_list.push_back(t);
+	}
+}