work

kernel/src/util/spin.rs

@@ -0,0 +1,19 @@
+use core::sync::atomic::{AtomicBool, Ordering};
+
+pub struct SpinLock {
+    pub locked: AtomicBool,
+}
+
+impl SpinLock {
+    pub fn new() -> Self {
+        Self {
+            locked: AtomicBool::new(false),
+        }
+    }
+    pub fn lock(&mut self) {
+        while self.locked.swap(true, Ordering::Acquire) {}
+    }
+    pub fn unlock(&mut self) {
+        self.locked.store(false, Ordering::Release)
+    }
+}