ext-workspace: implement v1

src/utils/opt.rs

@@ -0,0 +1,27 @@
+use {crate::utils::clonecell::CloneCell, std::rc::Rc};
+
+pub struct Opt<T> {
+    t: CloneCell<Option<Rc<T>>>,
+}
+
+impl<T> Default for Opt<T> {
+    fn default() -> Self {
+        Self {
+            t: Default::default(),
+        }
+    }
+}
+
+impl<T> Opt<T> {
+    pub fn set(&self, t: Option<Rc<T>>) {
+        self.t.set(t);
+    }
+
+    pub fn get(&self) -> Option<Rc<T>> {
+        self.t.get()
+    }
+
+    pub fn is_none(&self) -> bool {
+        self.t.is_none()
+    }
+}

src/utils/syncqueue.rs

@@ -53,4 +53,10 @@ impl<T> SyncQueue<T> {
         self.swap(&mut res);
         res
     }
+
+    pub fn clear(&self) {
+        unsafe {
+            self.el.get().deref_mut().clear();
+        }
+    }
 }